2026-04-13T22:18:47Zhttps://vtechworks.lib.vt.edu/server/oai/request

oai:vtechworks.lib.vt.edu:10919/1034242025-08-26T21:00:21Zcom_10919_5534col_10919_9291

Harlos, Annellie Rae Department of Biomedical Engineering and Mechanics Rowson, Steven Urban, Jillian Duma, Stefan M. 2021-05-21T08:00:39Z 2021-05-21T08:00:39Z 2021-05-20 vt_gsexam:30343 http://hdl.handle.net/10919/103424 Cycling is an increasingly popular mode of transportation and a preferred form of exercise worldwide. From 1990 to 2015, commuting via bicycle increased as much as four-fold in cities across North America and Europe. However, this increase in cycling is associated with an increase in cycling related fatalities and head injuries. The best way to prevent severe head injury while cycling is to wear a bike helmet. Bike helmets are designed to decrease the linear acceleration of the head, decreasing the rider's risk of severe head injuries, such as skull fracture. In order to sell a bike helmet, it must meet a minimum standard of protection based on linear acceleration of the head upon impact. However, bike helmet impacts are not completely linear in nature and experience a tangential component through angled impacts of the helmet, resulting in rotational accelerations and shear-strain at the skull-brain interface. This strain cause brain injuries such as concussion. Therefore, recent helmet advancements have aimed to decrease rotational acceleration of the head. To continue the advancement of helmet technology and the subsequent decrease of brain injury risk to riders, investigating the impact conditions of real-world impacts is pertinent. This thesis aimed to increase the current body of knowledge of cycling related head impacts. The first aim was to quantify real-world impact locations and analyze how impact location may influence helmet performance. The second aim of this thesis was to investigate the impact velocities and resulting kinematics of real-world crashes based on the magnitude of corresponding damage conditions. Additionally, this aim analyzed the impact conditions from cases which resulted in concussion. Together these studies aim to provide valuable real-world data to be used for the advancement of helmet technologies and design. Master of Science Cycling is an increasingly popular mode of transportation and a preferred form of exercise worldwide. From 1990 to 2015, commuting via bicycle increased as much as four-fold in cities across North America and Europe. However, this increase in cycling is associated with an increase in cycling related fatalities and head injuries. The best way to prevent severe head injury while cycling is to wear a bike helmet. Bike helmets are designed to decrease the linear acceleration of the head, decreasing the rider's risk of severe head injuries, such as skull fracture. In order to sell a bike helmet, it must meet a minimum standard of protection based on linear acceleration of the head upon impact. However, bike helmet impacts are not completely linear in nature and experience a tangential component through angled impacts of the helmet, resulting in rotational accelerations and shear-strain at the skull-brain interface. This strain cause brain injuries such as concussion. Therefore, recent helmet advancements have aimed to decrease rotational acceleration of the head. To continue the advancement of helmet technology and the subsequent decrease of brain injury risk to riders, investigating the impact conditions of real-world impacts is pertinent. This thesis aimed to increase the current body of knowledge of cycling related head impacts. The first aim was to quantify real-world impact locations and analyze how impact location may influence helmet performance. The second aim of this thesis was to investigate the impact velocities and resulting kinematics of real-world crashes based on the magnitude of corresponding damage conditions. Additionally, this aim analyzed the impact conditions from cases which resulted in concussion. Together these studies aim to provide valuable real-world data to be used for the advancement of helmet technologies and design. ETD Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ injury biomechanics concussion bike helmet kinematics Quantifying the Characteristics of Real-World Bicycle Helmet Impacts Thesis Master of Science masters Virginia Polytechnic Institute and State University Biomedical Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/866962025-08-28T17:38:38Zcom_10919_91436com_10919_5532col_10919_97333

2019-01-14T18:30:33Z 2019-01-14T18:30:33Z 2007 http://hdl.handle.net/10919/86696 6 1 https://www.hort.vt.edu/hhg/newsletters/2007_Summer.pdf This newsletter provides updates on activities, events, and educational programs at the Hahn Horticulture Garden. 8 pages application/pdf en Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Garden Leaflet, Summer 2007 Periodical Text StillImage School of Plant and Environmental Sciencesopen.access

oai:vtechworks.lib.vt.edu:10919/597092020-10-09T20:52:18Zcom_10919_86184com_10919_11358col_10919_86187

Elliott, Jean Blacksburg, Va. 2015-10-29T21:07:53Z 2015-10-29T21:07:53Z 2006-09-29 http://hdl.handle.net/10919/59709 Dan Brown has made some colorful (and controversial) historical claims in his The Da Vinci Code - claims only stoked by the recent release of the Da Vinci movie, starring Tom Hanks and directed by Ron Howard. Virginia Tech. University Relations In Copyright http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech. University Relations College of Liberal Arts and Human Sciences Faculty Examine the real and the imagined in The Da Vinci Code Press release Textopen.access

oai:vtechworks.lib.vt.edu:10919/525172025-08-28T17:38:38Zcom_10919_18732com_10919_19035com_10919_5539col_10919_52364

Virginia Tech. Digital Library Research Laboratory Virginia Tech. Department of Computer Science Farag, Mohamed M. G. Khan, Mohammed Saquib Akmal Ganesh, Prasad Krishnamurthi Mishra, Gaurav Fox, Edward A. Khandeparker, Ashwin S. Yang, Seungwon Ewers, John Kanan, Tarek Palani, Ashwin Chitturi, Kiran Fox, Edward A. Digital Library Research Laboratory Computer Science 2015-05-22T14:18:52Z 2015-05-22T14:18:52Z 2012-11-28 http://hdl.handle.net/10919/52517 http://curric.dlib.vt.edu/modDev/modules/Module_Crawling.2012-11-28.pdf This module covers the basic concepts of Web crawling, policies, techniques and how these can be applied to Digital Libraries. Draft 17 pages application/pdf en Digital Library Curriculum Project In Copyright http://rightsstatements.org/vocab/InC/1.0/ Computer science Digital libraries Web crawling Web policies Crawling Learning object Textopen.access

oai:vtechworks.lib.vt.edu:10919/1172222024-03-12T19:59:32Zcom_10919_5com_10919_25799com_10919_24217com_10919_5539col_10919_70873col_10919_24292

Kim, Sunwook Moore, Albert Ojelade, Aanuoluwapo Gutierrez, Nancy Harris-Adamson, Carisa Barr, Alan Srinivasan, Divya Nussbaum, Maury A. 2023-12-19T14:20:47Z 2023-12-19T14:20:47Z 2023-10-25 2169-5067 https://hdl.handle.net/10919/117222 https://doi.org/10.1177/21695067231192932 Kim, Sun Wook [0000-0003-3624-1781] Nussbaum, Maury [0000-0002-1887-8431] Ojelade, Aanuoluwapo [0000-0001-9715-3254] 1071-1813 Work-related musculoskeletal disorders (WMSDs) remain an important heath concern for construction workers. Occupational exoskeletons (EXOs) are a new ergonomic intervention to control WMSD risk, yet their adoption has been low in construction. We explored contributing factors to EXO use-intention, by building a decision tree to predict the intention to try an exoskeleton using responses to an online survey. Variable selection and hyperparameter tuning were used respectively to reduce the number of potential predictors, and for a better prediction performance. Performance was assessed using four common metrics. The importance of variables in the final tree was calculated to understand which variable had a greater influence. The final tree had moderate prediction performance. Important variables identified were associated with opinions on EXO use, demographics, job demands, and perceived potential risks. The key influential variables were EXOs becoming standard equipment and fatigue reduction with EXO use. Practical implications of the findings are discussed. Accepted version application/pdf en SAGE In Copyright http://rightsstatements.org/vocab/InC/1.0/ Exoskeletons Construction A data-driven approach to understand factors contributing to exoskeleton use-intention in construction Proceedings of the Human Factors and Ergonomics Society Annual Meeting Article - Refereed Text /Virginia Tech /Virginia Tech/Engineering /Virginia Tech/Engineering/Industrial and Systems Engineering /Virginia Tech/Faculty of Health Sciences /Virginia Tech/All T&R Faculty /Virginia Tech/Engineering/COE T&R Faculty /Virginia Tech/Graduate students /Virginia Tech/Graduate students/Doctoral studentsopen.access

oai:vtechworks.lib.vt.edu:10919/112362024-04-21T22:23:06Zcom_10919_5534col_10919_11041

Liu, Sixin Crop and Soil Environmental Sciences Wilkinson, Carol A. Veilleux, Richard E. Stromberg, Erik L. Griffey, Carl A. Saghai-Maroof, Mohammad A. 2011-08-22T19:04:14Z 2011-08-22T19:04:14Z 2000-05-02 1999-12-19 2001-01-05 2000-01-05 etd-121999-232244 http://hdl.handle.net/10919/11236 http://scholar.lib.vt.edu/theses/available/etd-121999-232244 Powdery mildew, caused by Blumeria graminis (DC.) E.O. Speer f. sp. tritici E'm. Marchal (syn. Erysiphe graminis f. sp. tritici), is one of the major diseases of wheat (Triticum aestivum L.) worldwide. The use of cultivars with resistance to powdery mildew is an efficient, economical and environmentally safe way to control powdery mildew. Race-specific resistance has been extensively used in breeding programs; however, it is ephemeral. Adult plant resistance (APR) to powdery mildew is more durable as demonstrated by the cultivar Massey, which has maintained its APR to powdery mildew since its release in 1981. To develop an efficient breeding strategy, it is essential to understand the genetic basis of APR. The objectives of this study were to identify molecular markers associated with APR to powdery mildew in common wheat Massey and to verify their association using recombinant inbred (RI) lines. A cross was made between the powdery mildew susceptible cultivar Becker and Massey. One hundred and eighty F2:3 lines were rated for disease severity under natural pressure of powdery mildew in field. Using both restriction fragment length polymorphism (RFLP) and microsatellite markers, three quantitative trait loci (QTL), designated as QPm.vt-1B, QPm.vt-2A and QPm.vt-2B, were identified in the Becker x Massey F2:3 generation. These loci are located on chromosomes 1B, 2A and 2B, respectively, and explained 17%, 29% and 11% of the total variation among F2:3 lines for powdery mildew resistance, respectively. Cumulatively, the three QTLs explained 50% of the phenotypic variation among F2:3 lines in a multi-QTL model. The three QTLs associated with APR to powdery mildew were derived from Massey and displayed additive gene action. QPm.vt-2B also fits a recessive model for APR to powdery mildew. In the second part of this study, 97 RI lines were developed from the Becker x Massey cross. The RI lines were evaluated for APR to powdery mildew under natural disease pressure for three years. Both single marker analysis and interval mapping confirmed the presence of the three QTLs identified in the F2:3 generation. The three QTLs, QPm.vt-1B, QPm.vt-2A and QPm.vt-2B, accounted for 15%, 26% and 15% of the variation of mean powdery mildew severity of the RI lines over three years. In a multi-QTL model, the three QTLs explained 44% of the phenotypic variation of the RI lines. The RI lines were grouped according to the genotype of the three QTLs, represented by markers GWM304a, KSUD22 and PSP3100, respectively. The RI lines with Massey alleles at all three loci had a mean disease severity of 3.4%, whereas the RI lines with Becker alleles at all three loci had a mean disease severity of 22.3%. These severity values are similar to those of the corresponding parents. The molecular markers identified and verified as to their association with APR to powdery mildew in Massey have the potential for use in marker-assisted selection for resistance to powdery mildew and in pyramiding powdery mildew resistance genes, as well as facilitating a better understanding of the molecular basis of APR to powdery mildew. Ph. D. ETD Virginia Tech etd-powdery.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ Blumeria graminis f. sp. tritici Erysiphe graminis f. sp. tritici wheat RFLP SSR QTL adult plant resistance Molecular marker analysis of adult plant resistance to powdery mildew in common wheat Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Crop and Soil Environmental Sciencesopen.access

oai:vtechworks.lib.vt.edu:10919/1203882024-06-29T07:00:15Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Schmidt, W. E. 2024-06-28T21:25:16Z 2024-06-28T21:25:16Z 1923-11-30 vcest013014 https://hdl.handle.net/10919/120388 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture reports field crops livestock Washington Co., County Agent Annual Report, 1923 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/1363412025-07-15T21:00:17Zcom_10919_121368com_10919_121365com_10919_11358col_10919_136126

Virginia Tech. Commission on Undergraduate Studies and Policies 2025-07-15T17:47:31Z 2025-07-15T17:47:31Z 2019-09-23 https://hdl.handle.net/10919/136341 9 pages application/pdf en Virginia Tech In Copyright (InC) http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech Commission on Undergraduate Studies and Policies: September 23, 2019 Meeting minutes Textopen.access

oai:vtechworks.lib.vt.edu:10919/1275982025-04-30T21:00:19Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Hamelin, Marguerite F. 2025-04-30T16:18:27Z 2025-04-30T16:18:27Z 1948 vcest087095 https://hdl.handle.net/10919/127598 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture reports field crops livestock Annual Narrative Report of Home Demonstration Work in Arlington County, Virginia 1948 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/910742025-08-28T17:38:38Zcom_10919_5534col_10919_9291

Ashayeri, Diane L. Human Nutrition and Foods 2019-07-03T18:56:49Z 2019-07-03T18:56:49Z 1987 http://hdl.handle.net/10919/91074 This study investigated the effects of ionic strength, pH, gum concentration, and protein type on protein - xanthan gum interactions. Commercial soy sauce and tamari sauce as well as model systems of soy protein isolate and whey protein concentrate were the sources of protein used for evaluation with xanthan gum. Preliminary research indicated that when either soy sauce or tamari sauce were mixed with xanthan gum, stable solutions with notable viscosity synergisms resulted. The soy protein and whey protein systems were subsequently prepared with a range of 0 to 5% added sodium chloride. Results indicated that an equilibrium existed between proteins and xanthan gum such that increased sodium chloride initially increased solution stability; but when in excess, the sodium chloride led to a loss of protein - xanthan gum solution solubility and in some cases to precipitation. Precipitation was also noted at the pH extremes of 2,3, and 9 and when xanthan gum was present in excess, or at 0.25%. The effects of sodium chloride, protein type, and pH on the rheological parameters of model solutions were also examined. Higher sodium chloride levels yielded greater viscosity synergisms. Those solutions made.with intact protein were generally higher in apparent viscosity than similar solutions made with hydrolyzed protein. Solutions at pH 5 were generally higher in viscosity than were similar solutions at pH 7. Several factors that appeared to affect the stability, solubility, and the rheological parameters of protein - xanthan gum solutions were sodium chloride concentration, gum concentration, pH, and protein type. M.S. xiii, 186 leaves application/pdf en Virginia Polytechnic Institute and State University OCLC# 16365616 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V855 1987.A79 Gel permeation chromatography Proteins -- Research Rheology Soyfoods Soy protein-xanthan gum interaction:stability and rheology Thesis Text M.S. masters Virginia Polytechnic Institute and State University Human Nutrition and Foodsopen.access

oai:vtechworks.lib.vt.edu:10919/1080872024-04-21T14:55:51Zcom_10919_5534col_10919_11041

Taheri Hosseinabadi, Sayedsina Electrical Engineering Kekatos, Vasileios Bansal, Manish Liu, Chen-Ching Centeno, Virgilio A. Saad, Walid 2022-02-02T09:01:37Z 2022-02-02T09:01:37Z 2022-02-01 vt_gsexam:33664 http://hdl.handle.net/10919/108087 With the integration of renewable and distributed energy resources (DER) and advances in metering infrastructure, power systems are undergoing rapid modernization that brings forward new challenges and possibilities, which call for more advanced learning, analysis, and planning tools. While there are numerous problems present in the modern power grid, in this work, this work has addressed four of the most prominent challenges and has shown that how the new advances in generation and metering can be leveraged to address the challenges that arose by them. With regards to learning in power systems, we first have tackled power distribution system topology identification, since knowing the topology of the power grid is a crucial piece in any meaningful optimization and control task. The topology identification presented in this work is based on the idea of emph{prob-to-learn}, which is perturbing the power grid with small power injections and using the metered response to learn the topology. By using maximum-likelihood estimation, we were able to formulate the topology identification problem as a mixed-integer linear program. We next have tackled the prominent challenge of finding optimal flexibility of aggregators in distribution systems, which is a crucial step in utilizing the capacity of distributed energy resources as well as flexible loads of the distribution systems and to aid transmission systems to be more efficient and reliable. We have shown that the aggregate flexibility of a group of devices with uncertainties and non-convex models can be captured with a quadratic classifier and using that classifier we can design a virtual battery model that best describes the aggregate flexibility. For power system analysis and planning, we have addressed fast probabilistic hosting capacity analysis (PHCA), which is studying how DERs and the intermittency that they bring to the power system can impact the power grid operation in the long term. We have shown that interconnection studies can be sped up by a factor of 20 without losing any accuracy. By formulating a penalized optimal power flow (OPF), we were able to pose PHCA as an instance of multiparametric programming (MPP), and then leveraged the nice properties of MPP to efficiently solve a large number of OPFs. Regarding planning in power systems, we have tackled the problem of strategic investment in energy markets, in which we have utilized the powerful toolbox of multiparametric programming to develop two algorithms for strategic investment. Our MPP-aided grid search algorithm is useful when the investor is only considering a few locations and our MPP-aided gradient descent algorithm is useful for investing in a large number of locations. We next have presented a data-driven approach in finding the flexibility of aggregators in power systems. Finding aggregate flexibility is an important step in utilizing the full potential of smart and controllable loads in the power grid and it's challenging since an aggregator controls a large group of time-coupled devices that operate with non-convex models and are subject to random externalities. We have shown that the aggregate flexibility can be accurately captured with an ellipsoid and then used Farkas' lemma to fit a maximal volume polytope inside the aforementioned ellipsoid. The numerical test showcases that we can capture 10 times the volume that conventional virtual generator models can capture. Doctor of Philosophy With the integration of renewable and distributed energy resources (DER) and advances in metering infrastructure, power systems are undergoing rapid modernization that brings forward new challenges and possibilities, which call for more advanced learning, analysis, and planning tools. While there are numerous problems present in the modern power grid, in this work, this work has addressed four of the most prominent challenges and has shown that how the new advances in generation and metering can be leveraged to address the challenges that arose by them. With regards to learning in power systems, we first have tackled power distribution system topology identification, since knowing the topology of the power grid is a crucial piece in any meaningful optimization and control task. We next have tackled the prominent challenge of finding optimal flexibility of aggregators in distribution systems, which is a crucial step in utilizing the capacity of distributed energy resources as well as flexible loads of the distribution systems and to aid transmission systems to be more efficient and reliable. For power system analysis and planning, we have addressed fast probabilistic hosting capacity analysis (PHCA), which is studying how DERs and the intermittency that they bring to the power system can impact the power grid operation in the long term. We have shown that interconnection studies can be sped up by a factor of 20 without losing any accuracy. Regarding planning in power systems, we have tackled the problem of strategic investment in energy markets, in which we have utilized the powerful toolbox of multiparametric programming to develop two algorithms for strategic investment. We next have presented a data-driven approach in finding the flexibility of aggregators in power systems. Finding aggregate flexibility is an important step in utilizing the full potential of smart and controllable loads in the power grid and it's challenging since an aggregator controls a large group of time-coupled devices that operate with non-convex models and are subject to random externalities. ETD en Virginia Tech Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Topology Identification Strategic Inestment Probabalistic Hosting Capacity Analysis Aggregate Flexibility Fast and Scalable Power System Learning, Analysis, and Planning Dissertation Doctor of Philosophy doctoral Virginia Polytechnic Institute and State University Electrical Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/403912022-02-22T19:58:14Zcom_10919_5534col_10919_11041

Gunn, Reamous Jr. Educational Leadership and Policy Studies Curcio, Claire Cole Vaught Parks, David J. Carlton, Patrick W. Salmon, Richard G. Yakimowski-Srebnick, Mary E. 2014-03-14T21:23:19Z 2014-03-14T21:23:19Z 1999-09-14 1999-12-03 2000-07-11 1999-07-11 etd-120399-131826 http://hdl.handle.net/10919/40391 http://scholar.lib.vt.edu/theses/available/etd-120399-131826/ The purpose of this study was to determine the effects of conflict resolution training on the number and severity of discipline referral offenses committed by high school students in one urban school. Effectiveness was measured by the number and severity of student discipline referrals to the school administration. Additionally, data were gathered and analyzed regarding student perceptions following application of conflict resolution training. The population (N=155) consisted of black and white students in grades nine through 12 who had previously received conflict-related discipline referrals. The samples (n=32) were selected using simple random sampling. Identified students were randomly assigned to one of two groups (treatment v. control). The treatment group received twelve hours of conflict resolution training. In addition, a four hour follow-up training session was conducted 60 days later. The control group did not receive training. Both quantitative and qualitative methodologies were used to determine the effects of conflict resolution training in this study. The independent variables were conflict resolution training, gender, and eligibility. The dependent variables were number of referrals and level of referrals. Data were collected from student discipline records and by conducting focus groups and individual interviews. The quantitative data were analyzed using the Statistical Package for the Social Sciences (SPSS-X). Two three-way analysis of variance (ANOVA) were used to test all hypotheses. When an alpha level of .05 was used, only the interaction between gender and eligibility was significant with respect to both the number and level of discipline referrals. Further analyses were conducted to "tease apart" the interactions. In order to ascertain participants' perceptions of the effects of conflict resolution training, the qualitative data were content analyzed to record emerging themes. When the data were content analyzed, 10 themes emerged with respect to the participants' perceptions. These themes revealed that participants' perceptions were mostly positive. Participants reported that the training influenced positive changes in their own behavior and the behavior of others. Ed. D. Virginia Tech Dissertation710.PDF In Copyright http://rightsstatements.org/vocab/InC/1.0/ Discipline Referrals Secondary Schools Conflict Resolution The Effects of Conflict Resolution Training on Students with Previous Discipline Referrals Dissertation Doctor of Education doctoral Virginia Polytechnic Institute and State University Educational Leadership and Policy Studiesopen.access

oai:vtechworks.lib.vt.edu:10919/156442024-04-22T17:46:18Zcom_10919_11335com_10919_25799col_10919_11385

Whiting, Shawn Layman 2012-03-12T15:10:10Z 2012-03-12T15:10:10Z c. 2007 2012-03-12 prevails3T00048 S3L2T0048 http://hdl.handle.net/10919/15644 image/jpeg Digital Library and Archives, University Libraries, Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Card from the Layman Family in Buffalo, New York Card Image Image Buffalo New York United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/640712025-08-28T17:38:38Zcom_10919_5534col_10919_9291

Willey, Clarke R. Economic Entomology and Horticulture 2015-11-13T20:44:24Z 2015-11-13T20:44:24Z 1922 http://hdl.handle.net/10919/64071 6 leaves application/pdf en Virginia Agricultural and Mechanical College and Polytechnic Institute OCLC# 30367304 Creative Commons Public Domain Mark 1.0 http://creativecommons.org/publicdomain/mark/1.0/ LD5655.V855 1922.W555A Peach twig-borer Peach -- Diseases and pests The peach twig borer Thesis Text Master of Science Master of Science masters Virginia Agricultural and Mechanical College and Polytechnic Institute Economic Entomology and Horticultureopen.access

oai:vtechworks.lib.vt.edu:10919/1312992025-05-09T16:00:22Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Washington, Elaine M. Kelly, D. J. Settle, F. Gerald Oliver, W. W. 2025-05-09T14:52:40Z 2025-05-09T14:52:40Z 1959 vcest124107 https://hdl.handle.net/10919/131299 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture reports field crops livestock Elaine M. Washington's Annual Report of County Extension Home Demonstration Work in King and Queen County and County Agent D.J. Kelly's Annual Report of Agricultural Extension Service in King William County, Virginia 1959 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/499182024-05-24T02:52:36Zcom_10919_5534col_10919_11041

Arenburg, Robert Thomas Engineering Mechanics Reddy, Junuthula N. Aboudi, J. Hendricks, Scott L. Henneke, Edmund G. Johnson, Eric R. Mook, Dean T. 2014-08-13T14:38:47Z 2014-08-13T14:38:47Z 1988 http://hdl.handle.net/10919/49918 The nonlinear behavior of continuous-fiber-reinforced metal-matrix composite structures is examined using a micromechanical constitutive theory. Effective lamina and laminate constitutive relations based on the Aboudi micromechanics theory are presented. The inelastic matrix behavior is modeled by the unified viscoplasticity theory of Bodner and Partom. The laminate constitutive relations are incorporated into a first-order shear deformation plate theory. The resulting boundary value problem is solved by utilizing the finite element method. · Computational aspects of the numerical solution, such as the temporal integration of the inelastic strains and the spatial integration of bending moments are addressed. Numerical results are presented which illustrate the nonlinear response of metal matrix composites subjected to extensional and bending loads. Experimental data from available literature are in good agreement with the numerical results. Ph. D. incomplete_metadata xi, 179 leaves application/pdf Virginia Polytechnic Institute and State University OCLC# 19719229 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V856 1988.A736 Metallic composites Composite construction Structural analysis (Engineering) Analysis of metal matrix composite structures using a micromechanical constitutive theory Dissertation Text Ph. D. doctoral Virginia Polytechnic Institute and State University Engineering Mechanicsopen.access

oai:vtechworks.lib.vt.edu:10919/1385312025-10-21T21:00:08Zcom_10919_121367com_10919_121365com_10919_11358col_10919_137144

Virginia Tech. Staff Senate 2025-10-21T17:21:48Z 2025-10-21T17:21:48Z 1999-02-18 https://hdl.handle.net/10919/138531 4 pages application/pdf en Virginia Tech In Copyright (InC) http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech Staff Senate: February 18, 1999 Meeting minutes Textopen.access

oai:vtechworks.lib.vt.edu:10919/368402024-04-07T03:21:16Zcom_10919_5534col_10919_9291

Navarra, Kelly R. Mechanical Engineering O'Brien, Walter F. Jr. Gord, J. R. Rabe, Douglas C. Dancey, Clinton L. 2014-03-14T20:51:58Z 2014-03-14T20:51:58Z 1997-04-24 1997-04-24 1997-07-16 1997-07-16 etd-61597-17256 http://hdl.handle.net/10919/36840 http://scholar.lib.vt.edu/theses/available/etd-61597-17256/ A new pressure-measurement technique which employs the tools of molecular spectroscopy has recently received considerable attention in the fluid mechanics community. Measurements are made via oxygen-sensitive molecules attached to the surface of interest as a coating, or paint. The pressure-sensitive-paint (PSP) technique is now commonly used in stationary wind-tunnel tests; this thesis presents the extension of the technique to advanced turbomachinery applications. New pressure- and temperature-sensitive paints (TSPs) have been developed for application to a state-of-the-art transonic compressor where pressures up to 2 atm and surface temperatures up to 140° C are expected for the first-stage rotor. PSP and TSP data has been acquired from the suction surface of the first-stage rotor of a transonic compressor operating at its peak-efficiency condition. The shock structure is clearly visible in the pressure image, and visual comparison to the corresponding computational fluid dynamics (CFD) prediction shows qualitative agreement to the PSP data. Master of Science Virginia Tech Thesisetd.PDF In Copyright http://rightsstatements.org/vocab/InC/1.0/ Pressure-sensitive paint turbomachinery optical pressure measurement techniques luminescence quenching. Development of the Pressure-Sensitive-Paint Technique for Advanced Turbomachinery Applications Thesis Master of Science masters Virginia Polytechnic Institute and State University Mechanical Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/821372025-08-28T17:38:38Zcom_10919_112356com_10919_23261com_10919_5539com_10919_79468com_10919_78628col_10919_112357col_10919_79481

2018-02-15T19:03:41Z 2018-02-15T19:03:41Z 2013-02 http://hdl.handle.net/10919/82137 http://seb199.me.vt.edu/cehms/downloads/chronicles/ 1 2 This is the quarterly newsletter for the Center for Energy Harvesting Materials and Systems. en Virginia Tech Creative Commons Attribution-NonCommercial 3.0 United States http://creativecommons.org/licenses/by-nc/3.0/us/ The CEHMS Chronicle, February 2013 Periodicalopen.access

oai:vtechworks.lib.vt.edu:10919/535202025-08-28T17:38:38Zcom_10919_5534col_10919_11041

Gramoll, Kurt C. Engineering Mechanics Hendricks, Scott L. Reifsnider, Kenneth L. Knight, Charles E. Brinson, H.F. Dillard, D.A. 2015-06-24T13:35:04Z 2015-06-24T13:35:04Z 1988 http://hdl.handle.net/10919/53520 This study consisted of two main parts, the thermoviscoelastic characterization of Kevlar 49/Fiberite 7714A epoxy composite lamina and the development of a numerical procedure to predict the viscoelastic response of any general laminate constructed from the same material. The four orthotropic material properties, S₁₁, S₁₂, S₂₂, and S₆₆, were characterized by 20 minute static creep tests on unidirectional ([0]₈, [10]₈, and [90]₁₆) lamina specimens. The Time-Temperature-Superposition-Principle (TTSP) was used successfully to accelerate the characterization process. A nonlinear constitutive model was developed to describe the stress dependent viscoelastic response for each of the material properties. A new numerical procedure to predict long term laminate properties from lamina properties (obtained experimentally) was developed. Numerical instabilities and time constraints associated with viscoelastic numerical techniques were discussed and solved. The numerical procedure was incorporated into a user friendly microcomputer program called Viscoelastic Composite Analysis Program (VCAP), which is available for IBM ‘PC’ type computers. The program was designed for ease of use and includes graphics, menus, help messages, etc. The final phase of the study involved testing actual laminates constructed from the characterized material, Kevlar/epoxy, at various temperature and load levels for 4 to 5 weeks. These results were then compared with the VCAP program predictions to verify the testing procedure (i.e., the applicability of TTSP in characterizing composite materials) and to check the numerical procedure used in the program. The actual tests and predictions agreed, within experimental error and scatter, for all test cases which included 1, 2, 3, and 4 fiber direction laminates. The end result of the study was the development and validation of a user friendly microcomputer program that can be used by design engineers in industry to predict thermoviscoelastic properties of orthotropic composite materials. Ph. D. vii, 293 leaves application/pdf en Virginia Polytechnic Institute and State University OCLC# 18361233 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V856 1988.G725 Viscoelasticity Laminated materials Epoxy compounds -- Testing Thermoviscoelastic characterization and predictions of Kevlar/epoxy composite laminates Dissertation Text Ph. D. doctoral Virginia Polytechnic Institute and State University Engineering Mechanicsopen.access

oai:vtechworks.lib.vt.edu:10919/390682024-05-24T02:46:27Zcom_10919_5534col_10919_11041

Zeccolo, Peggy L. Public Administration and Policy Goodsell, Charles T. Kuhns, C. Silva, M.C. Wolf, J.F. White, O.F. 2014-03-14T21:17:19Z 2014-03-14T21:17:19Z 1996 2007-08-06 2007-08-06 2007-08-06 etd-08062007-094417 http://hdl.handle.net/10919/39068 http://scholar.lib.vt.edu/theses/available/etd-08062007-094417/ The nature, origin and validity of ethics for nursing administrators were studied using a historical design with analytical and conceptual methodologies. This was done for the purpose of clarifying those issues for the practical matter of ethical decision making for nursing administrators. Research in that area has been limited. An extensive analysis of 491 ethical articles, published from 1900-1989 and classified as personal, professional and administrative ethics; an analysis of the nursing codes of ethics and registration laws; trends in case and statute law; as well as conceptual literature and research provided the base for the facts, reasoned arguments, conclusions, interpretations and recommendations. Validity control features, (e.g., primary sources, multiple types of sources, and historical comparisons of trends) were used to minimize internal and external criticisms, as well as ensure integrity. Inter-rater reliability (90%) was ascertained to establish the consistency of the classifications of the data for the sake of replication. The results of this research supported the hypothesis that there is a distinctive nature to the ethics for nursing administrators, especially those employed in public organizations. This research also concluded that the ethic of the traditional staff nurse is inappropriate for nursing administrators. Less significant results and conclusions linked nursing administration with fresh ideas such as the public interest, public advocacy, public policy, constitutional competency, utilitarianism, and collective ethical decision making. A new model termed Collective Caring, was introduced as a more valid ethic. The Collective Caring Model has three major components (i.e., caring, cooperation and collectives) enhanced by utilitarianism. Collective Caring should be used to depersonalize the situation and integrate the values of the different collectives, as well as encourage utilitarianism, sharing, caring and cooperating for collective ethical decision making. Nursing administrators would be more critically aware of collective (e.g., public) values and more thoughtful about making ethical decisions. In addition, the effectiveness of the profession would be improved by clarifying and enhancing professional and collective relationships. Ph. D. ix, 234 leaves BTD application/pdf en Virginia Tech OCLC# 35301188 LD5655.V856_1996.Z433.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V856 1996.Z433 The nature, origin, and validity of ethics for nursing administrators Dissertation Text Ph. D. doctoral Virginia Polytechnic Institute and State University Public Administration and Policyopen.access

oai:vtechworks.lib.vt.edu:10919/1055972024-04-21T11:33:12Zcom_10919_5523col_10919_5548

Virginia Cooperative Extension Jamison, Kathleen Bonnett, Erika 2021-10-21T02:27:47Z 2021-10-21T02:27:47Z 2021-02-01 2021-02-01 http://hdl.handle.net/10919/105597 https://resources.ext.vt.edu/contentdetail?contentid=2504&contentname=Virginia%204-H%20Fashion%20Revue%2FClothing%20Record Virginia 4-H Fashion Revue/Clothing Record 3 pages application/pdf en Virginia Cooperative Extension Publication (Virginia Cooperative Extension); 346-147 Publication (Virginia Cooperative Extension); 4H-472NP Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Club resources Record Books 4-H clubs competitive ability records Virginia 4-H Fashion Revue/Clothing Record Extension publication Textopen.access

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Virginia Cooperative Extension Service Relf, Diane Adler, Barry, 1952- McDaniel, Alan, 1948- 2017-11-30T20:18:44Z 2017-11-30T20:18:44Z 1981-01 http://hdl.handle.net/10919/80904 Provides a summary of a wide range of information concerning the culture, nutritional value, harvest, and storage of garlic. Reprinted. 2 pages application/pdf en Virginia Cooperative Extension Service MH (Virginia Cooperative Extension Service) ; 428 Virginia Home Food Production Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. LD5655.A761 Allium sativum Crop production Nutrition Garlic Extension publication Textopen.access

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Virginia Tech. Commission on University Support 2025-10-27T17:33:48Z 2025-10-27T17:33:48Z 2015-09-17 https://hdl.handle.net/10919/138671 16 pages application/pdf en Virginia Tech In Copyright (InC) http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech Commission on University Support: September 17, 2015 Meeting minutes Textopen.access

oai:vtechworks.lib.vt.edu:10919/262112024-04-23T06:42:10Zcom_10919_5534col_10919_11041

Zhang, Wenyan Plant Pathology, Physiology, and Weed Science Chevone, Boris I. Grabau, Elizabeth A. Hess, John L. Beers, Eric P. Nessler, Craig L. 2014-03-14T20:07:32Z 2014-03-14T20:07:32Z 2007-02-01 2007-02-15 2008-03-27 2007-03-27 etd-02152007-110933 http://hdl.handle.net/10919/26211 http://scholar.lib.vt.edu/theses/available/etd-02152007-110933/ Vitamin C (ascorbic acid, AsA), an important primary metabolite of plants, functions as an antioxidant, an enzyme cofactor, and a cell-signaling modulator in a wide array of crucial physiological processes including biosynthesis of the cell wall, secondary metabolites and phytohormones, stress resistance, photoprotection, cell division, senescence, and growth. To identify genes that may regulate vitamin C levels in plants, about 3000 activation-tagged Arabidopsis lines were treated with ozone, which is a power oxidizing agent. Two mutants were selected for identification of potential genes involved in the regulation of vitamin C synthesis. A putative F-box gene, VCF1, and a purple acid phosphatase, AtPAP15, were identified for further characterization. Two homozygous SALK T-DNA knockouts in the open reading frame (ORF) of VCF1 exhibited high tolerance to ozone when treated with 450 ppb for 3 hours and the AsA levels of these mutants were 2 to 3 fold higher than wild-type (wt) plants. Developmental studies, using RT-PCR, indicated that foliar expression of the VCF1 gene increased with plant age from 1 to 5 weeks, whereas AsA decreased during this same period. The expression of VCF1 was higher under a low-light condition in which AsA was reduced considerably. The AsA levels in two VCF1 overexpressing lines were only 50 to 70% of wt plants. These results suggested that the putative F-box gene functions as a negative regulator of leaf ascorbate content. Overexpression of AtPAP15 with the CaMV 35S promoter resulted in up to 3-fold higher AsA levels than wt plants, where two independent SALK T-DNA insertion mutants in AtPAP15 had 50% less AsA than wt plants. Enzyme activity of bacterially expressed GST:AtPAP15 was greatest with phytate as a substrate indicating that AtPAP15 is a phytase. Phytase catalyzes hydrolysis of phytate (myo-inositol hexakisphosphate) to yield myo-inositol and free phosphate. Thus, AtPAP15 may regulate AsA levels by controlling the input of myo-inositol into this branch of AsA biosynthesis in Arabidopsis. AtPAP15 was expressed in all tested organs in wt plants and suggests that the enzyme may have functions other than phytate degradation during seed germination. Ph. D. Virginia Tech Thesis_Zhang.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ RT-PCR GUS TAIL-PCR activation tagging AtPAP15 VCF1 ascorbate Arabidopsis Identification and Characterization of Genes Involved in Regulation of Ascorbate Metabolic Pathway(s) in Arabidopsis thaliana Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Plant Pathology, Physiology, and Weed Scienceopen.access

oai:vtechworks.lib.vt.edu:10919/307092024-04-24T23:01:50Zcom_10919_5534col_10919_11041

Read, Frederick R. Adult and Continuing Education Wiswell, Albert K. Stout, M. Belli, Gabriella M. McKeen, Ronald L. Stubblefield, Harold W. 2014-03-14T20:22:32Z 2014-03-14T20:22:32Z 1997-05-19 1997-05-19 1997-09-30 1997-09-30 etd-81297-152342 http://hdl.handle.net/10919/30709 http://scholar.lib.vt.edu/theses/available/etd-81297-152342/ The purpose of this study was to determine the value, if any, of a mentoring program for beginning U.S. Army Reserve Forces School instructors, specifically: how mentored and unmentored beginning instructors differ in their perception of a mentorship program, how do mentors improve, if at all, the beginner's instructional practice, how mentors assist the beginner's understanding of the school's operating procedures, and how formally and informally mentored instructors differ in their perception of a mentorship program. Army Reserve instructors teaching the Command and General Staff Course (CGSOC) and the Combined Arms Services Staff Course (CAS3), were the subjects for this study. The total population of 267 instructors was surveyed by questionnaire, 217 (81.3%) usable responses were received. ANOVA and t-test statistic calculations showed a significant difference between the mean responses of instructors with a formal mentor and those with an informal or no mentor. Instructors with formal mentors strongly agree that mentorship is beneficial to beginners and should be part of an induction program. Formal mentors helped improve practice through observation, feedback, counseling, and direct assistance. Instructors with formal mentors state they were provided an orientation into administrative, logistical, and standard operating procedures. Finally, the formally mentored group report they were helped to become better instructors, guided in professional development, given a formal assessment of their instructional abilities, and provided materials to improve practice and maintain competence. The data appear to suggest that a formal mentorship program produces a more prepared beginning instructor. Ed. D. Virginia Tech ReadDis.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ induction mentors mentoring The Perceived Value of Mentoring by Beginning Usarf Instructors With Formal, Informal and No Mentors Dissertation Doctor of Education doctoral Virginia Polytechnic Institute and State University Adult and Continuing Educationopen.access

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Becker, Matthew H. Harris, Reid N. Biological Sciences 2018-11-12T20:11:11Z 2018-11-12T20:11:11Z 2010-06-04 e10957 http://hdl.handle.net/10919/85821 https://doi.org/10.1371/journal.pone.0010957 5 6 20532032 1932-6203 Chytridiomycosis, caused by the fungal pathogen Batrachochytrium dendrobatidis (Bd), is an infectious disease that causes population declines of many amphibians. Cutaneous bacteria isolated from redback salamanders, Plethodon cinereus, and mountain yellow-legged frogs, Rana muscosa, inhibit the growth of Bd in vitro. In this study, the bacterial community present on the skin of P. cinereus individuals was investigated to determine if it provides protection to salamanders from the lethal and sub-lethal effects of chytridiomycosis. When the cutaneous bacterial community was reduced prior to Bd exposure, salamanders experienced a significantly greater decrease in body mass, which is a symptom of the disease, when compared to infected individuals with a normal bacterial community. In addition, a greater proportion of infected individuals with a reduced bacterial community experienced limb-lifting, a behavior seen only in infected individuals. Overall, these results demonstrate that the cutaneous bacterial community of P. cinereus provides protection to the salamander from Bd and that alteration of this community can change disease resistance. Therefore, symbiotic microbes associated with this species appear to be an important component of its innate skin defenses. Published version application/pdf en PLOS Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Cutaneous Bacteria of the Redback Salamander Prevent Morbidity Associated with a Lethal Disease PLOS ONE Article - Refereed Textopen.access

oai:vtechworks.lib.vt.edu:10919/332312024-04-25T04:10:21Zcom_10919_5534col_10919_9291

Heath, Shannon Raelene English Graham, Peter W. Radcliffe, David H. Anderson, Linda 2014-03-14T20:38:35Z 2014-03-14T20:38:35Z 2007-05-21 2007-05-25 2007-06-01 2007-06-01 etd-05252007-154850 http://hdl.handle.net/10919/33231 http://scholar.lib.vt.edu/theses/available/etd-05252007-154850/ In the eighteenth and early nineteenth centuries, the duel of honor functioned as a formal recourse to attacks on a gentleman's reputation. Concurrently, many notable literary figures such as Samuel Johnson, William Gifford, Thomas Moore, and Lord Byron were involved in literary disputes featuring duels or the threat of physical violence, a pattern indicating a connection between authorship and dueling. This study explicitly examines this connection, particularly as it relates to social acceptance, the gentrification of authorship, and the business of publishing. The act of publishing, putting one's work into the public sphere for consumption as well as critique, created an acute sensitivity to issues of honor because publishing automatically broadcast insults or accusations of dishonorable conduct to the reading public. This study requires a grounded discussion of complex, interconnected concepts, specifically: masculine identity, social hierarchy, and violence; satire; dueling; and authorship. Discussion moves from a foundational concern with violence and the assertion of social status, to the relationship between status and honor, to specific modes of defending honor, and finally to the attempt to establish authorship as an honorable profession. Although each of these quarrels exhibits physical violence or the threat of physical violence, these examples also exhibit verbal violence through satiric assaults or an exchange of verbal attacks and parries. As professional writers struggled to overcome the stereotype of the literary hack and gain social respectability, dueling, with either lead or paper bullets, became a way for authors to defend and maintain the fragile social status they had gained. Master of Arts Virginia Tech SRHeathThesisETD.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ Wolcot Byron Moore Jeffrey Pindar Gifford Johnson dueling satire Macpherson “Paper Bullets of the Brain”: Satire, Dueling and the Rise of the Gentleman Author Thesis Master of Arts masters Virginia Polytechnic Institute and State University Englishopen.access

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2017-10-26T16:50:34Z 2017-10-26T16:50:34Z 2016 http://hdl.handle.net/10919/79801 http://cnre.vt.edu/magazine/ This is the quarterly news magazine of Virginia Tech's College of Natural Resources and Environment. en Virginia Tech Creative Commons Attribution-NonCommercial 3.0 United States http://creativecommons.org/licenses/by-nc/3.0/us/ CNRE News, Fall 2016 Periodical College of Natural Resources and Environment (CNRE)open.access

oai:vtechworks.lib.vt.edu:10919/364522024-04-25T10:41:54Zcom_10919_5534col_10919_9291

Constantine, Irene Elizabeth Architecture Galloway, William U. Feuerstein, Marcia F. Schneider, Mark E. 2014-03-14T20:50:48Z 2014-03-14T20:50:48Z 2001-06-15 2007-12-26 2008-02-11 2008-02-11 etd-12262007-155504 http://hdl.handle.net/10919/36452 http://scholar.lib.vt.edu/theses/available/etd-12262007-155504/ Architecture exists through human experience. As the product of the relationship between a building and a person, architecture gains meaning when it is viewed and contemplated by an individual moving throughout a building. Architecture simultaneously engages the body and mind of one who experiences it, and its intentions become visible through a continuous weaving of motion through situations that constitute a place. My thesis examines the interplay between architecture and human action. Manifest in the following thesis are explorations of the institution of the museum. From its earliest forms to its present day forms, the museum has undergone many changes due to a number of influences. In this thesis I will look at the cultural dynamics that shape museums. Specifically, my critique will be through the lens of its cultural history, my own culturally based observations, and through a design: the demonstration. One objective of this thesis is to revive the idea of the museum as a place of the muses, where the muses inspire those people who experience the place. I have selected Charleston and its historic setting for the project location of a Museum. This is a place where one might participate in a journey of initiation, education, and cultivation. Through design, I demonstrate a museum, which aims to initiate and encourage self-cultivation by one's experience of the objects in the museum and the space that surrounds the objects. It is perhaps through a perusal of objects contained without authoritative concepts applied that one may acquire knowledge and become inspired. Master of Architecture Virginia Tech constantineMARCHETD.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ matrix institution Hunley submarine artifacts Charleston Architecture muses museum Architecture and the Inspiration of the Museum Thesis Master of Architecture masters Virginia Polytechnic Institute and State University Architectureopen.access

oai:vtechworks.lib.vt.edu:10919/272502024-04-07T03:24:11Zcom_10919_5534com_10919_78363com_10919_5549col_10919_11041col_10919_82827

Matovic, Dragan Hospitality and Tourism Management McCleary, Ken W. Weaver, Pamela A. Renaghan, Leo Murrmann, Suzanne K. Williams, John A. 2014-03-14T20:10:44Z 2014-03-14T20:10:44Z 2002-04-17 2002-04-25 2003-05-06 2002-05-06 etd-04252002-163659 http://hdl.handle.net/10919/27250 http://scholar.lib.vt.edu/theses/available/etd-04252002-163659/ The primary objective of this study was to explore the relationship among various market structure constructs (consisting of barriers to entry, competition, growth, and market share) and their potential impact on financial performance. By applying theoretical underpinnings from the disciplines of marketing, strategy and industrial organization economics, and adapting them to the unique characteristics of the U.S. lodging industry, the above constructs were linked to produce the Lodging Market Structure (LMS) Model. The study consisted of a cross-sectional analysis using a sample of 67 well-recognized hotel brands operating in the U.S. (representing 63 percent of the national guestroom inventory), covering a four-year period between 1996 and 1999. Correlation and multiple regression analysis were used to examine the hypothesized relationships within the LMS model. This study represented the first comprehensive investigation of the competitive market structure of the U.S. lodging industry. The key findings of the study indicate that the financial performance of hotel brands in the United States is strongly impacted by competitive market structure. Among the various market structure constructs studied, barriers to entry played the most dominant role in determining the level of financial performance of hotel brands. Based on a strong negative relationship, barriers to entry are very effective in reducing competition in the U.S. lodging industry. Also, of the constructs studied, barriers to entry had the greatest influence on enhancing the market share of incumbent hotel brands. The growth rate of those incumbent brands has a positive relationship with barriers to entry. As competition intensifies, the growth rate of hotel brands slows down. Increases in competition are negatively correlated with a brand's market share. Competition has a strong negative relationship with the financial performance of hotel brands. Market share improves as the growth rate of hotel brands increases. As the growth rate of brands increases, profitability also improves. Likewise, improvements in a hotel brand's market share are positively related to increases in profitability. Lastly, the U.S. lodging market is becoming more competitive, and the industry has reached the mature stage of its lifecycle. Ph. D. Virginia Tech matovic.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ financial performance competition market structure lodging brands The Competitive Market Structure of the U.S. Lodging Industry and its Impact on the Financial Performance of Hotel Brands Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Hospitality and Tourism Managementopen.access

oai:vtechworks.lib.vt.edu:10919/953542025-10-03T13:52:03Zcom_10919_24227com_10919_5532col_10919_87778

Virginia Tech, Extension Service Virginia Cooperative Extension (VCE) Biological Systems Engineering V.P.I._Campus,_Blacksburg,_VA Virginia Montgomery County (Va.) 2019-11-08T16:37:38Z 2019-11-08T16:37:38Z 1945-05-02 AE_Archives_box06_env074_image01 http://hdl.handle.net/10919/95354 General photo of TVA-John Deere multiple-use drill. Close-up of connection to tractor. negative, 3.5 x 5 in. image/jpeg Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Biological Systems Engineering, Virginia Tech Applied Science Agriculture Virginia Extension - Project 10 Agricultural Engineering Multiple Use Drill Farm Implements Farm Operating Equipment Project 10 Image - VA Montgomery County - 1945-05-02 Photograph StillImageopen.access

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Toomhirun, Sontichai Electrical Engineering 2017-11-09T20:41:33Z 2017-11-09T20:41:33Z 1987 http://hdl.handle.net/10919/80046 Residential demand is a large and important factor of the utility load during the system peak period. And the control of residential demand can make a significant change to the system load of the utility. This research is designed to study the residential end-use appliances under various direct load control schemes. These appliances are water heaters, air conditioners, and space heaters which are the major electrical demand of the residential load. The study will apply the LOADSIM, an Electrical Power Research Institute (EPRI) load simulation program, to conduct load control strategies of these residential appliances. The LOADSIM program can be applied both for cycling and shedding control strategies during a specified control period. In this study, the cycling control is done on an air conditioner and space heater. The water heating control is performed under shedding strategy. The research has studied the appliance use of four house types under the same weather and control conditions. A total of 100,000 houses have been used in the study. These houses have the same dwelling and appliance characteristics but their house insulations are different. Diversity in house insulations gives different results in terms of load reduction and temperature change due to the load control. For example, a better-insulated house demands less electricity for its appliance than a low-insulated house. This study also uses the EPRl-LOADSIM program to estimate the load reduction and temperature change of each house type under the load control. Master of Science xi, 128 leaves application/pdf en Virginia Polytechnic Institute and State University OCLC# 17604974 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V855 1987.T668 Electric utilities -- Time-of-use pricing Study of residential demand for electricity as functions of load control schemes and dwelling characteristics Thesis Text Master of Science masters Virginia Polytechnic Institute and State University Electrical Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/1202122024-06-29T07:00:19Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Buchanan, Frank A. 2024-06-28T21:17:18Z 2024-06-28T21:17:18Z 1923 vcest010057 https://hdl.handle.net/10919/120212 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture reports field crops livestock Dairy Report Nov 30, 1922- Dec. 1, 1923 Annual Diarying Extension Work Report Project No. 8 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/966262025-08-28T17:38:38Zcom_10919_5523col_10919_5548

Virginia Polytechnic Institute and State University. Extension Division Virginia Cooperative Extension Service Porter, Marjorie A. 2020-01-30T23:07:53Z 2020-01-30T23:07:53Z 1970-09 http://hdl.handle.net/10919/96626 Provides tips for buying nutritious food while still saving money. Revised 12 pages application/pdf en Virginia Polytechnic Institute and State University. Extension Division Publication (Virginia Polytechnic Institute and State University. Extension Division) ; 14 Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Grocery shopping Food Shopping Buying food Extension publication Textopen.access

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2018-08-15T17:51:21Z 2018-08-15T17:51:21Z 2013-12 http://hdl.handle.net/10919/84721 https://medicine.vtc.vt.edu/faculty-affairs/faculty-development/free.html 1 2 This newsletter focuses each month on some aspect of faculty development, including tips, resources and various opportunities designed to support faculty success at the Virginia Tech Carilion School of Medicine. In this issue: The Learning Environment (Part One). 2 pages application/pdf en Virginia Tech In Copyright (InC) This Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s). For other uses you need to obtain permission from the rights holder(s). http://rightsstatements.org/vocab/InC/1.0/ Faculty Resources for Educational Excellence (FREE) Newsletter, December 2013 Periodical textopen.access

oai:vtechworks.lib.vt.edu:10919/1020342024-04-21T06:10:06Zcom_10919_5534col_10919_11041

Asgari, Elham Management Hunt, Richard A. Gnyawali, Devi R. Srivastava, Manish Kumar Tegarden, Linda F. Townsend, David M. 2021-01-24T07:00:31Z 2021-01-24T07:00:31Z 2019-08-02 vt_gsexam:21901 http://hdl.handle.net/10919/102034 In my dissertation, I examine varied types of knowledge and how they contribute to innovation generation and selection at both the firm and the industry level using the emerging industry context of small satellites. My research is divided into three papers. In Paper One, I take a supply-demand perspective and examine how suppliers of technology—with their unique knowledge of science and technology—and users of technology—with their unique knowledge of demand—contribute to innovation generation and selection over the industry lifecycle. Results show that the contributions of suppliers and users vary based on unique aspects of innovation, such as novelty, breadth, and coherence – and also over the industry life cycle. In Paper Two, I study how firms overcome science-business tension in their pursuit of novel innovation. I examine unique aspects of knowledge: scientists' business knowledge and CEOs' scientific knowledge. I show that CEOs' scientific knowledge is an important driver of firms' novel pursuits and that this impact is higher when scientists do not have business knowledge. In the third paper, I further examine how scientists with high technological and scientific knowledge—i.e., star scientists—impact firm innovation generation and selection. With a focus on explorative and exploitative innovation, I develop theory on the boundary conditions of stars' impact on firm level outcomes. I propose that individual level contingencies—i.e., stage of employment—and organizational level contingencies—explorative or exploitative innovation—both facilitate and hinder stars' impact on firms' innovative pursuits. Doctor of Philosophy In my dissertation, I study innovation at both the firm level and the industry level using the emerging industry context of small satellites. My dissertation divides into three papers. In Paper One, I study unique aspects of innovation at the industry level taking a supply-demand perspective. Since novelty, breadth, and convergence of innovation are all important drivers of the emergence and evolution of industries, I examine how supply side or demand side actors contribute to unique aspects of innovation over the industry life cycle. Results suggest that both suppliers and users of technology make important contributions to innovation, however, their respective contributions vary to novelty, breadth, and convergence of innovation. This impact varies over the industry life cycle. In Paper Two, I study how firms pursue novel innovation as main creator of economic value for firms. Firms need both scientific and technological knowledge in their pursuit of novel innovation. However, firms often struggle to overcome science-business tensions. Focusing on CEOs and scientists as two main drivers of innovation, I study how CEOs’ scientific knowledge and scientists’ business knowledge help firms overcome business-science tension. Results suggest that the likelihood of firms’ novel pursuit is higher when CEOs have scientific knowledge and scientists do not have business knowledge. In Paper Three, I further examine how high-performing scientists—i.e., star scientists—impact explorative and exploitative innovation. I propose that the stage of employment of individuals and goal context of firms are important contingencies that impact how stars impact firm level innovation. ETD Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Innovation Demand-Side Perspective Industry Evolution Scientific Knowledge Business Knowledge Small Satellite Industry Topic Modeling The Impact of Varied Knowledge on Innovation and the Fate of Organizations Dissertation Doctor of Philosophy doctoral Virginia Polytechnic Institute and State University Business, Managementopen.access

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Virginia Cooperative Extension Service Faiszt, James A. 2017-11-30T20:18:21Z 2017-11-30T20:18:21Z 1978-03 http://hdl.handle.net/10919/80823 Describes the purposes of planting small flowering trees around your home. Provides a list of small trees that are readily available and can be grown under a wide range of cultural conditions. Reprinted. 4 pages application/pdf en Virginia Cooperative Extension Service MH (Virginia Cooperative Extension Service) ; 158 Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. LD5655.A761 Ornamental woody plants Landscaping Small Flowering Trees Extension publication Textopen.access

oai:vtechworks.lib.vt.edu:10919/974212023-11-29T02:11:38Zcom_10919_78363com_10919_5549col_10919_78369

Honerkamp, Vincent 2020-03-22T03:36:30Z 2020-03-22T03:36:30Z 2020-03-12 http://hdl.handle.net/10919/97421 This article examines the organization phenomenon of coercive acquaintance advertising, which is born of social media context and emerging in tourism and hospitality industry. Empirical results analyzing the multisource and time-lagged data collected from 358 travel agency employees provide general support for our hypotheses. Specifically, this article finds that the practice of coercive acquaintance advertising leads employees to suffer from inter role conflict arising from being a worker and “friend” simultaneously on their personal social media networks, which in turn can affect their job performance, job satisfaction, and turnover intention. In addition, such mediation process can be strengthened by the high-level of employee’s feedback sensitivity such that there is the moderated mediation mechanism in the relationships between coercive acquaintance advertising and employee work outcomes. The findings have theoretical and practical implications for researchers and practitioners. en Virginia Tech Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ advertising Trapped as a Good Worker: The Influence of Coercive Acquaintance Advertising on Work Outcomes [Summary] Summaryopen.access

oai:vtechworks.lib.vt.edu:10919/1383472025-10-21T21:00:10Zcom_10919_121367com_10919_121365com_10919_11358col_10919_137144

Virginia Tech. Staff Senate 2025-10-21T17:21:29Z 2025-10-21T17:21:29Z 2010-02-18 https://hdl.handle.net/10919/138347 1 page 1 page application/pdf en Virginia Tech In Copyright (InC) http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech Staff Senate: February 18, 2010 Meeting minutes Textopen.access

oai:vtechworks.lib.vt.edu:10919/530472024-04-27T08:51:24Zcom_10919_5534col_10919_9291

Dunay, Donna W. Architecture 2015-06-23T19:08:13Z 2015-06-23T19:08:13Z 1975 http://hdl.handle.net/10919/53047 The work is divided into two parts, a verbal section and a visual section. The former is supportive, the latter is the main body of the work. Described, this thesis would be closer to a philosophy of design rather than a polemic or manifesto about design. Although it is concerned with the investigation of aesthetic qualities of single objects, within each project lies a universal concern, the struggle for order. The intent is to address the gap between art and daily life and through the design of the immediate environment bring about a more pleasurable and meaningful set of experiences. The role of a designer is briefly discussed and the concept of always dealing with two as an approach to design is elaborated. But the important meaning of the work is succinctly expressed in a statement by David Jones, "There is no surrogate for being on the job." The designer must acknowledge the obligation not only to generate new ideas, but translate them into three dimensional realities. Master of Architecture vi, 68 leaves application/pdf en Virginia Polytechnic Institute and State University OCLC# 39010807 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V855 1975.D847 Too (2): offerings of small environments Thesis Text Master of Architecture masters Virginia Polytechnic Institute and State University Architectureopen.access

oai:vtechworks.lib.vt.edu:10919/987162024-04-29T09:09:51Zcom_10919_91912com_10919_23198col_10919_98494

2020-06-03T20:28:54Z 2020-06-03T20:28:54Z 2019-10 http://hdl.handle.net/10919/98716 38 https://www.teach.vtc.vt.edu/wp-content/uploads/2019/11/e-TEACH-Oct-2019.pdf The e-TEACH Newsletter features highlights of many of our resources, as well as links to other leading educator websites. Each edition features timely information about hot topics and upcoming professional development opportunities. 1 page application/pdf en TEACH (Teaching Excellence Academy for Collaborative Healthcare) In Copyright (InC) This Item is protected by copyright and/or related rights. Some uses of this Item may be deemed fair and permitted by law even without permission from the rights holder(s). For other uses you need to obtain permission from the rights holder(s). http://rightsstatements.org/vocab/InC/1.0/ e-TEACH Newsletter, October 2019 Periodical Text StillImageopen.access

oai:vtechworks.lib.vt.edu:10919/772952025-08-28T17:38:38Zcom_10919_5534col_10919_11041

Pinto, Ameet John Civil Engineering Love, Nancy G. Bott, Charles B. Stevens, Ann M. Novak, John T. Puri, Ishwar K. 2017-04-06T15:44:36Z 2017-04-06T15:44:36Z 2009-12-07 2009-12-21 2016-10-17 2010-01-15 etd-12212009-094300 http://hdl.handle.net/10919/77295 http://scholar.lib.vt.edu/theses/available/etd-12212009-094300/ This study consists of three research phases. First, we developed corrective action strategies to mitigate the impact of calcium hypochlorite and cadmium pulse shocks for the Plum Island Wastewater Treatment Plant (WWTP) in Charleston, SC. The corrective action strategies were developed in consultation with industrial consultants and operational personnel from the utility. These strategies were tested using a laboratory scale system, which was constructed and operated similar to the parent facility. Two corrective actions were tested for calcium hypochlorite, while only one strategy was tested for the cadmium at the laboratory scale. This study shows that no corrective action strategies are required for an acute hypochlorite stress. This is due to the fact that hypochlorite is highly reactive and dissipates rapidly on contact with the wastewater matrix, thus causing only low level process deterioration. In fact, implementation of corrective action strategies results in greater process deterioration as compared to the non-intervention approach. The corrective action tested for cadmium stress showed potential for reducing the peak impact of the toxin and allowed for faster process recovery as compared to the unstressed control. For the second phase, the corrective actions were tested at a pilot scale facility operated at the Plum Island wastewater treatment plant. We tested two different corrective action strategies for cadmium, while only one strategy was tested for hypochlorite during the pilot scale study. Similar to the laboratory scale experiments, we conclude that no mitigative approaches are necessary for an acute hypochlorite stress. Additionally, the implementation of mitigative approaches for the pilot scale cadmium stress events resulted in greater process deterioration as compared to the non-intervention approach. In contrast to the laboratory scale experiments, theoretical effluent blending calculations showed that corrective actions may not reduce the impact of the cadmium stress. This was attributed to the lower intensity of process deterioration caused by the simulated cadmium stress. The pilot scale study shows that prior to implementing a corrective action strategy, the operator should determine the probable extent of process deterioration due to the detected chemical contaminant before deciding if a corrective action is needed. The pilot scale study also evaluated the effectiveness of current sensor technologies towards the upstream detection of influent anomalies and reliable monitoring of process performance during an upset event. Multivariate analysis on the rate of change of influent sensor signals was reliably able to detect the presence of both toxins tested during this study. For the third phase of this research, we investigated the impact of cadmium stress on the structure and function of bioreactor microbial communities. We observed significant increases in post-stress heterotrophic and autotrophic bacterial respiration rates for the bioreactors subjected to cadmium stress. The higher respiration rates were due to an increase in bacterial abundance in the cadmium stressed reactors. We were also able to show that the increase in bacterial abundance was not due to changes in community structure or due to cadmium induced deflocculation. In fact, this study demonstrates that transient cadmium stress reduces predator abundance within the activated sludge community and this reduction in predator grazing was responsible for the increase in bacterial abundance. This research highlights the importance of higher life forms, specifically eukaryotic microorganisms, in regulating bacterial community dynamics in systems undergoing chemical perturbations. Ph. D. en Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ microbial community hypochlorite corrective action sensors cadmium activated sludge upset event predator grazing Upset Events At Wastewater Treatment Plants: Implications for Mitigative Strategy Development and Bioreactor Microbial Ecology Dissertation Text Ph. D. doctoral Virginia Polytechnic Institute and State University Civil Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/672802025-08-28T17:38:38Zcom_10919_5532col_10919_64847

Aklilu, H. A. Almekinders, C. J. M. Udo, H. M. J. Van der Zijpp, A. J. Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase Ethiopia 2016-04-19T19:30:41Z 2016-04-19T19:30:41Z 2007 3130 Tropical Animal Health and Production 39(3): 165-177 0049-4747 http://hdl.handle.net/10919/67280 Metadata only record This study was conducted in three different locations to understand poultry consumption and marketing in relation to gender, socio-cultural events and market access in Tigray, Ethiopia. Qualitative and quantitative data was collected over a period of 12 months. Results show that market access was linked to shorter market chain and higher prices for the producers. The majority of producers and sellers are women, but men dominate the group of intermediaries. This is due to men's greater access to financial resources, market information, and ability to take risks. The sale and consumption per family member is between 25 to 66 percent higher in female-headed household compared to male-headed households. Women are more likely to have control over the money from their own sales than when men do the selling for them. According to previous studies women also tend to spend their money on family needs. Men tend to become more involved in selling poultry only when market access increases. Improving market access can improve poor households. text/plain en In Copyright http://rightsstatements.org/vocab/InC/1.0/ Copyright 2007 Springer Science and Business Media B.V. Women Markets Gender Local markets Ethiopia Methodology Market access Religious festivals Village poultry Households Village poultry consumption and marketing in relation to gender, religious festivals and market access Abstract Textmetadata.only

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Virginia Cooperative Extension Chase, Melissa W. Brooks, Austin Boyer, Renee R. Rafie, Carlin Carrington, Anne-Carter 2017-03-08T18:02:20Z 2017-03-08T18:02:20Z 2015-11-18 2016-03-21 http://hdl.handle.net/10919/75382 http://www.pubs.ext.vt.edu/HNFE/HNFE-320/HNFE-320-10/HNFE-320-10-pdf.pdf A factsheet for using cucumbers as a source of food, including quick tips for use and preparation and two recipes. 1 page application/pdf en Virginia Cooperative Extension Publication (Virginia Cooperative Extension) ; HNFE-320-10NP Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Health & Nutrition Cucumbers food preparation Eat Smart, Move More at Farmers Markets: Cucumbers Cucumbers Extension publication Textopen.access

oai:vtechworks.lib.vt.edu:10919/776132024-12-17T20:37:08Zcom_10919_10194col_10919_18655

Bologna-Jill, Stephen Duong, Kevin Ha, Jason Yongjoo Zurita, Jazmine Sume, Tinsaye Smith, Ryan 2017-05-12T16:39:12Z 2017-05-12T16:39:12Z 2017-04-28 http://hdl.handle.net/10919/77613 This project provides users with a means to organize, graph, and analyze specific data recorded from Stroubles Creek. The website will be utilized by an Undergraduate Biological Systems Engineering class to help with their labs that deal with the health of Stroubles Creek. Our team was designated with the task of improving a website that was created by a past Computer Science capstone team. The website we started with was barely functional and could not yet be used by the Undergraduate Biological Systems Engineering class. The website required many modifications in both the front end interface as well as the backend. Our team split up into three two-person groups based off of skill and desired learning objectives. These teams include a backend team, a front end user-interface team, and a data graphing team. The main front-end improvements that were enacted on the website include a complete overhaul of the entire user-interface and the addition of a usable navigation bar that enables users to easily use all features of the website. Backend improvements include major changes to the tables in the MySQL database as well as PHP functions that make utilizing the database extremely easy for the data graphing team. The changes made to the database tables allowed for a more straightforward representation of the data and enabled saving graphs for a specific experiment. Most of the improvements were on the data graphing aspect of the website. Users are now able to analyze six years of data collected from Stroubles Creek. They can analyze this data by creating either line graphs or scatter plots of whatever specific creek data they want. The graphs provide users with the ability to see trends in creek health over the course of many years. Currently, the website is ready to be used by Undergraduate Biological Systems Engineering classes. It provides all the functionality that our client required and does so in a clean, easy-to-use manner. Even though the website is ready for use, there are still areas that can be improved upon. These areas include more graph options, easier ways to upload new data sets, graphing large amounts of data points, and the aesthetics of the graphs. DataB1StageWQ_Polys170421clean.csv - The complete dataset of Stroubles Creek data in CSV format StreamFieldFinalReport.docx - The Word document format of the final report StreamFieldFinalReport.pdf - The PDF format of the final report StreamFieldPresentation.pptx - The PowerPoint format of the final presentation StreamFieldPresentation.pdf - The PDF format of the final presentation stream_lab.zip - The compressed zip file of the entire project's files application/pdf en Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Stroubles Creek Experiments website graph dataset Fusality for Stream and Field Dataset Presentation Report Software Textopen.access

oai:vtechworks.lib.vt.edu:10919/1325622025-05-19T21:00:20Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Morton, Lee W. Jr. Barbour, Kermit Shaw, R. L. Jr. West, Thomas E. Yates, Bertie R. Cox, Kitty Sue 2025-05-19T17:43:03Z 2025-05-19T17:43:03Z 1961 vcest130165 https://hdl.handle.net/10919/132562 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture reports field crops livestock Lee W. Morton, Jr. and Bertie R. Yates's Combined Annual Statistical Report of County Extension Workers in Charlotte County, Virginia 1961 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/829202024-04-29T00:14:49Zcom_10919_5534col_10919_11041

Arca, Hale Cigdem Learning Sciences and Technologies Edgar, Kevin J. Davis, Richey M. Turner, S. Richard Sriranganathan, Nammalwar Taylor, Lynne S. 2018-04-26T06:00:32Z 2018-04-26T06:00:32Z 2016-11-01 vt_gsexam:8931 http://hdl.handle.net/10919/82920 Amorphous solid dispersion (ASD) is a popular method to increase drug solubility and consequently poor drug bioavailability. Cellulose ω-carboxyesters were designed and synthesized specifically for ASD preparations in Edgar lab that can meet the ASD expectations such as high Tg, recrystallization prevention and pH-triggered release due to the free -COOH groups. Rifampicin (Rif), Ritonavir (Rit), Efavirenz (Efa), Etravirine (Etra) and Quercetin (Que) cellulose ester ASDs were investigated in order to increase drug solubility, prevent release at low pH and controlled release of the drug at small intestine pH that can improve drug bioavailability, decrease needed drug content and medication price to make it affordable in third world countries, and extent pill efficiency period to improve patient quality of life and adherence to the treatment schedule. The studies were compared with cellulose based commercial polymers to prove the impact of the investigation and potential for the application. Furthermore, the in vitro results obtained were further supported by in vivo studies to prove the significant increase in bioavailability and show the extended release. The need of new cellulose derivatives for ASD applications extended the research area, the design and synthesis of a new class of polymers, alkyl cellulose ω-carboxyesters for ASD formulations investigated and the efficiency of the polymers were summarized to show that they have the anticipated properties. The polymers were synthesized by the reaction of commercial cellulose alkyl ethers with benzyl ester protected, monofunctional hydrocarbon chain acid chlorides, followed by removal of protecting group using palladium hydroxide catalyzed hydrogenolysis to form the alkyl cellulose wcarboxyalkanoate. Having been tested for ASD preparation, it was proven that the polymers were efficient in maintaining the drug in amorphous solid state, release the drug at neutral pH and prevent the recrystallization for hours, as predicted. Ph. D. ETD Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Cellulose esters cellulose ether esters Amorphous solid dispersions structure-property relationship anti-HIV rifampicin quercetin solubility enhancement Cellulose Esters and Cellulose Ether Esters for Oral  Drug Delivery Systems Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Macromolecular Science and Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/550482025-08-28T17:38:38Zcom_10919_5523col_10919_5548

Sanchez, Elsa 2015-07-31T19:25:23Z 2015-07-31T19:25:23Z 2008-09-10 2014-10-07 http://hdl.handle.net/10919/55048 http://pubs.ext.vt.edu/2906/2906-1374/2906-1374_pdf.pdf In organic growing the philosophy behind soil fertility is to feed the soil and the soil in turn will feed the cash crop. Cover crops, green manures, animal manures and sound crop rotations are used to improve and/or maintain soil fertility. This article focuses on the use of green manures. 2 pages application/pdf en Virginia Cooperative Extension Publication (Virginia Cooperative Extension) ; 2906-1374 Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Soils Green manures Organic farming Cover crops The Organic Way -- Selecting Green Manure Crops for Soil Fertility Extension publication Textopen.access

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Virginia Polytechnic Institute. Agricultural Extension Service Barton, Jo Anne 2018-04-11T18:45:14Z 2018-04-11T18:45:14Z 1964-04 http://hdl.handle.net/10919/82797 Discusses making bread and provides recipes for various types of bread. Revised 7 pages application/pdf en Virginia Polytechnic Institute. Agricultural Extension Service. Circular (Virginia Polytechnic Institute. Agricultural Extension Service) ; 383 Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Cooking (Bread) Cooking, American bread breadmaking Making bread at home Extension publication Textopen.access

oai:vtechworks.lib.vt.edu:10919/1224672024-11-13T22:00:14Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Jamison, Ruth 2024-11-13T18:42:21Z 2024-11-13T18:42:21Z 1930-11-30 vcest029042 https://hdl.handle.net/10919/122467 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture field crops livestock Annual narrative report of home demonstration work, Augusta county, Virginia Annual Narratives & Statistical Reports from state offices and county agents Virginia United States Textopen.access

oai:vtechworks.lib.vt.edu:10919/785442024-04-28T16:16:15Zcom_10919_5523com_10919_91436com_10919_5532col_10919_5548col_10919_97229

Behl, Harry D. Thomason, Wade E. Hokanson, Liz Virginia Cooperative Extension (VCE) School of Plant and Environmental Sciences 2016 2017-07-31T19:45:12Z 2017-07-31T19:45:12Z 2016-10-21 2016-11-04 http://hdl.handle.net/10919/78544 http://www.pubs.ext.vt.edu/CSES/CSES-173/CSES-173-pdf.pdf This report contains the results for performance trials from commercial corn hybrids produced for silage at four locations in Virginia in 2016 as well as two and three year average performance, when available. Multi-year yields are presented as a percentage of the total called relative yield at that particular site-year combination 36 pages application/pdf en Virginia Cooperative Extension Publication (Virginia Cooperative Extension) ; CSES-173NP Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Grains Corn Silage Commercial hybrids Performance testing Virginia Tech Corn Silage Testing 2016 Extension publication Textopen.access

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Gohain, Pradip Kumar Electrical Engineering 2016-04-21T15:34:58Z 2016-04-21T15:34:58Z 1968 http://hdl.handle.net/10919/70513 Theoretical analysis and comparison of three basic digital data communication systems, namely, amplitude-shift keying (ASK), frequency-shift keying (FSK), and phase-shift keying (PSK), for both binary coded and M-ary coded transmissions are presented in this paper. The analysis is limited to only nonfading received signal in additive Gaussian noise. Both coherent and noncoherent detection schemes are considered. A symbol error-rate or probability of error is used as the performance criterion for comparison purpose. Master of Science iii, 74 leaves application/pdf en Virginia Polytechnic Institute OCLC# 38300972 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V855 1968.G6 Error-rates of digital signaling with coherent and noncoherent detections Thesis Text Master of Science masters Virginia Polytechnic Institute Electrical Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/598512024-04-27T17:01:10Zcom_10919_86184com_10919_11358col_10919_86187

Douglas, Jeffrey S. Blacksburg, Va. 2015-10-29T21:08:15Z 2015-10-29T21:08:15Z 2006-12-20 http://hdl.handle.net/10919/59851 For many, Christmas is a time to count your blessings, appreciate the love of family and friends and reach out to others. Virginia Tech. University Relations In Copyright http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech. University Relations Virginia-Maryland College of Veterinary Medicine Holiday blessings for a boy and his dog Press release Textopen.access

oai:vtechworks.lib.vt.edu:10919/832352024-08-27T14:38:05Zcom_10919_5534col_10919_9291

Holmes, David Alexander Mechanical Engineering Gabler, Hampton Clay Southward, Steve C. Hardy, Warren N. 2018-05-17T08:00:24Z 2018-05-17T08:00:24Z 2018-05-16 vt_gsexam:15225 http://hdl.handle.net/10919/83235 Cross-centerline crashes occur rarely in the United States but are especially severe. This type of crash is characterized by one vehicle departing over a centerline and encountering a vehicle traveling in the opposite direction. In recent years, automakers have started developing and implementing lane departure warning (LDW) on newer vehicles. This system provides the potential to reduce or significantly impact the frequency of cross-centerline crashes. The objective of this thesis was to estimate the potential crash and injury benefits of a LDW system if installed on every vehicle in the US fleet. This research includes the following 1) a characterization of cross-centerline crashes in the United States today with current and future prevention methods, 2) a reconstruction methodology used for all crashes including rollovers and heavy vehicles, and 3) a simulation model and approach method used to estimate potential benefits of LDW systems on cross-centerline crashes. Cross over to left crashes account for only 4% of non-junction non-interchange crashes but account for 44% of serious injury crashes of the same type. As part of this research, 42 cross-centerline crashes were reconstructed and simulated as if they had a LDW system installed. Accounting for driver capability to react to a LDW alert, crash reduction benefits ranged from 22 – 30%.Using injury risk curves, the probability of experiencing a MAIS2+ injury in a cross-centerline crash was reduced by 29% when using a LDW system. Master of Science Cross over to left crashes occur rarely but are typically very severe. Cross over to left crashes include wrong side of road crashes, cross over to left due to loss of control, and cross over to left over centerline crashes, also known as cross-centerline crashes. Cross-centerline crashes are typically very severe due to the high closing speeds of both vehicles. Lane departure warning (LDW) is a safety system developed by auto manufacturers designed to help drivers stay in their travel lane. Upon leaving your lane without using a turn signal, a LDW system will provide an alert to warn you to stay in your lane. While LDW systems have been found to be effective for preventing road departure crashes, there have been few studies on their effectiveness for preventing cross-centerline crashes. The research objective of this thesis was to estimate the number of crashes in the United States that would be avoided if every vehicle was equipped with a LDW system. It was also of interest to determine the number of front-row occupants who would not experience a greater than moderate level of injury (MAIS2+) with a LDW system installed. To form the dataset, 42 crashes were initially selected, reconstructed, and simulated as if the encroaching vehicle had a LDW system installed. The speed profile of the vehicle was constructed using crash simulation software and an approach model in order to predict the vehicle speed prior to the crash. Driver capability to react to a LDW warning was also accounted for resulting in a range of benefits. With a LDW system installed, 22- 30% of cross-centerline crashes would be avoided. The probability of experiencing a MAIS2+ injury was also reduced by 29% when a LDW system was installed. ETD Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ active safety car crashes lane departure warning The Effect of Lane Departure Warning Systems on Cross-Centerline Crashes Thesis Master of Science masters Virginia Polytechnic Institute and State University Mechanical Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/885052025-08-28T17:38:38Zcom_10919_5540col_10919_25336

Feerrar, Julia Miller, Rebecca K. 2019-03-20T17:44:23Z 2019-03-20T17:44:23Z 2015-10 http://hdl.handle.net/10919/88505 As instructors for many core undergraduate courses, graduate teaching assistants (GTAs) are important university library partners in learning and information literacy. But as novice teachers and budding scholars themselves, GTAs have their own unique needs. How can librarians support GTAs and other new academics in their teaching and learning roles? en Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States http://creativecommons.org/licenses/by-nc-sa/3.0/us/ Student, teacher, and partner: Understanding and supporting the many roles of graduate teaching assistants Presentationopen.access

oai:vtechworks.lib.vt.edu:10919/103552023-11-29T18:57:50Zcom_10919_85650com_10919_5540col_10919_88463

Rorer, Sarah Tyson Heston Virginia Tech. University Libraries. Special Collections Department Virginia Tech. Digital Library and Archives Philadelphia, Pa. 2011-08-14T22:16:14Z 2011-08-14T22:16:14Z 1914 http://hdl.handle.net/10919/10355 557 pages application/pdf Arnold Creative Commons Public Domain Mark 1.0 http://creativecommons.org/publicdomain/mark/1.0/ http://scholar.lib.vt.edu/digital_books/index.html Diet in disease Cooking for the sick Mrs. Rorer's Diet for the Sick; Dietetic Treating of Diseases of the Body Book Textopen.access

oai:vtechworks.lib.vt.edu:10919/647362024-04-27T22:01:56Zcom_10919_5534col_10919_11041

Altizer, Carol Jane Supervision 2016-02-01T18:34:22Z 2016-02-01T18:34:22Z 1977 http://hdl.handle.net/10919/64736 The purpose of this exploratory research study was to investigate, both theoretically and experimentally, the hypothesis that the manipulation of concrete materials can contribute substantively to the learning of the operation of multiplication of polynomials and its inverse, factorization, in children who are in eighth-grade pre-algebra mathematics classes. The study involved a comparison of the achievement of students who used manipulatives to learn how to multiply and factor polynomials with the achievement of those who did not use manipulatives to learn to operate on the polynomials. The instructional material designed for use by both treatment groups was based on the theory of learning developed by this writer. It was theorized that as students use manipulatives to learn mathematical concepts the actions performed upon the concrete materials would be abstracted or internalized in the mind as operations. The study involved four teachers and 173 students from two middle schools in the Pulaski County School System, Pulaski, Virginia. The means and standard deviations of the students' scores on both the immediate posttest and retention test were compared as well as inferences made from the data using several analyses of covariance. The Orleans-Hanna Algebra Prognosis Test served as the pretest for this study. The F ratios from the analyses of covariance conducted on the immediate posttest scores from Experiment I indicated that (1) using the total population of students, there was no statistical difference in mean scores between the manipulative and nonmanipulative groups (p = 0.385); (2) using only Teacher A's students, there was no statistical difference in mean scores between the manipulative and nonmanipulative groups (p = 0.609); and (3) using only Teacher B's students, there was a marginal difference in mean scores between the manipulative and nonmanipulative groups (p = 0.071), favoring the nonmanipulative group. The F ratios from analyses of covariance conducted on the retention test scores from Experiment I indicated that (1) using the total population of students, there was a statistical difference in mean scores between the manipulative and nonmanipulative groups (p < 0.005), favoring the manipulative groups; (2) using only Teacher A's students, there was a statistical difference in mean scores between the manipulative and nonmanipulative groups (p < 0.009), favoring the manipulative group; (3) using only Teacher B's students there was no statistical difference in mean scores between the manipulative and the nonmanipulative groups (p = 0.241). However, the mean score of Teacher B's manipulative group was higher than the mean score of his nonmanipulative group. The study was replicated (Experiment II) immediately following Experiment I in two classes taught by Teacher D.* The F ratio from an analysis of covariance conducted on the immediate posttest scores indicated that there was no statistical difference in mean scores between the manipulative and nonmanipulative groups (p = 0.762). The F ratio from an analysis of covariance conducted on the retention test scores indicated that there was no statistical difference in mean scores between the manipulative and nonmanipulative groups (p = 0.143). However, the mean score of the manipulative group was higher than the mean score of the nonmanipulative group. In summary, there are implications from these findings that the manipulation of concrete materials by students does aid the learning of the mathematical transformation of multiplication of polynomials and its inverse, factorization. This was especially evident for retention of the operations. These findings support the theory of learning conceptualized for this study. *Teacher C was omitted from the analyses of the data since she taught only a manipulative group. ED. D. ix, 211 leaves application/pdf en Virginia Polytechnic Institute and State University OCLC# 40244494 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V856 1977.A48 The role of manipulatives in learning to multiply and factor polynomials Dissertation Text ED. D. doctoral Virginia Polytechnic Institute and State University Supervisionopen.access

oai:vtechworks.lib.vt.edu:10919/731612024-12-10T14:33:02Zcom_10919_5com_10919_25799com_10919_24211com_10919_5553col_10919_70873col_10919_24287

Schwabl, Franz Täuber, Uwe C. Trigg, GL Physics 2016-10-04T17:26:24Z 2016-10-04T17:26:24Z 1995 http://hdl.handle.net/10919/73161 13 343 - 371 page(s) en VCH http://www.wiley.com/WileyCDA/WileyTitle/productCd-3527404783.html In Copyright http://rightsstatements.org/vocab/InC/1.0/ Phase transitions: renormalization and scaling Encyclopedia of Applied Physics Article Text /Virginia Tech /Virginia Tech/All T&R Faculty /Virginia Tech/Science /Virginia Tech/Science/COS T&R Faculty /Virginia Tech/Science/Physicsopen.access

oai:vtechworks.lib.vt.edu:10919/1187612025-08-28T17:38:38Zcom_10919_10194col_10919_105656

Harris, Silver Brinson, Greg Mistry, Aastha Dinesh, Tanya Harris, Violet 2024-05-04T19:29:06Z 2024-05-04T19:29:06Z 2024-05-03 https://hdl.handle.net/10919/118761 Cold Caller Final Presentation Video Cold Caller is a volunteer management system for political candidates to use when polling the public. We have an admin side to manage/create volunteer accounts, track their progress and most recent activity, and view the survey responses in mass. The volunteer side accesses a database of voters that will pull a set and assign to volunteers for calling and surveying. The volunteer starts a survey and is given step-by-step instructions on what to say and immediately records the voter’s response. They are prompted to submit and save that response as soon as they finish the survey. We track the volunteer’s performance and give a visual reward upon completing a full set of calls. The platform is extremely user friendly and designed for users without technical prowess. en Attribution-NonCommercial-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nc-nd/4.0/ Cold Caller Final Presentation Video Presentationopen.access

oai:vtechworks.lib.vt.edu:10919/956162024-04-29T02:25:41Zcom_10919_24227com_10919_5532col_10919_87778

Virginia Tech, Extension Service Virginia Cooperative Extension (VCE) Biological Systems Engineering Virginia Agricultural Experiment Station, Blacksburg, VA Virginia Montgomery County (Va.) 2019-11-19T00:17:31Z 2019-11-19T00:17:31Z 1905-04-26 AE_Archives_box07_env068_image01 http://hdl.handle.net/10919/95616 View up W-III draw - camera located on apron of gaging station. Note that strips have not yet been established at top of hill adjacent to R-II. 1 negative, 3.5 x 5 in. image/jpeg Virginia Tech Creative Commons Public Domain Mark 1.0 http://creativecommons.org/publicdomain/mark/1.0/ Applied Science Agriculture Virginia Extension - Project 10 Agricultural Engineering Watershed Water Runoff Soil and Water Conservation Project 10 Image - VA Montgomery County - 1905-04-26 Photograph StillImageopen.access

oai:vtechworks.lib.vt.edu:10919/623382020-10-09T20:59:37Zcom_10919_86184com_10919_11358col_10919_86187

Elliott, Jean Blacksburg, Va. 2015-10-29T21:35:22Z 2015-10-29T21:35:22Z 2009-09-11 http://hdl.handle.net/10919/62338 The LGBT faculty-staff caucus at Virginia Tech will host best-selling author Dorothy Allison as the speaker for the 5th annual Gay in Appalachia event on Friday, Sept. 18 at 7 p.m. in the Squires Studio Theatre. text/html Virginia Tech. University Relations In Copyright http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech. University Relations College of Liberal Arts and Human Sciences Fifth annual Gay in Appalachia event to feature Dorothy Allison Press release Textopen.access

oai:vtechworks.lib.vt.edu:10919/357532024-04-25T09:13:40Zcom_10919_5534col_10919_9291

Hu, Yongxuan Electrical and Computer Engineering Lee, Fred C. Lindner, Douglas K. Boroyevich, Dushan 2014-03-14T20:48:06Z 2014-03-14T20:48:06Z 2001-11-19 2001-11-19 2002-11-26 2001-11-26 etd-11192001-150026 http://hdl.handle.net/10919/35753 http://scholar.lib.vt.edu/theses/available/etd-11192001-150026/ The High-Intensity-Discharge Lamps (HID), consisting of a broad range of gas discharge lamps, are notable for their high luminous efficacy, good color rendering, and long life. Metal halide lamps have the best combination of the above properties and are considered the most ideal light sources. Recently, there has been an emerging demand to replace the conventional halogen headlamps with the newly introduced small-wattage metal halide HID lamps. However, this lamp demands a highly efficient ballast and very complex control circuitry that can achieve fast turn-on and different regulation modes during the lamp start-up process. Due to the complex lamp v-i profile and timing control requirements, control circuit built with conventional analog control is unavoidably cumbersome. With the unparalleled flexibility and programmability, digital control shows more advantages in this application. An automotive HID ballast with digital controller is developed to demonstrate the feasibility of the digital control along with some key issues in digital controller selection and design. Results show that the microcontroller-based HID ballast can successfully realize the required control functions and achieve a smooth turn-on process and a fast turn-on time of 8 seconds. One of the major issues of ballast design is the ballast/HID lamp system stability, which originates from the lamp negative incremental impedance. The lamp small-signal model is presented with simulation and measurements. The negative incremental impedance is attributed to a RHP zero in the small-signal model. A new analysis approach, impedance ratio criterion, is proposed to analyze the system stability. With this approach, it clearly shows how the control configurations and converter and control design affect the system stability. The results can provide guidance and be easily used in control configuration selection and converter and control design. Analysis shows that ballast based on PWM converter without inner current loop is unstable and with inner current loop can stabilized the system. This is the reason why for a microcontroller-based ballast system the inner current loop has to be used. HID lamp has its special acoustic resonance problem and thus a low-frequency unregulated full-bridge is used following the front-end DC/DC converter. To prevent from lamp re-igniting during each bridge commutation, a minimum current changing slope has to be guaranteed. In order to help design the converter, the ballast/lamp re-ignition analysis is presented. With this analysis, it shows that the output capacitance has to be small enough to ensure adequate current slope during zero crossing. Though some approximation is used to simplify the analysis, the results can provide qualitative guidance in the ballast design. Master of Science Virginia Tech Thesis_Yongxuan_Hu.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ HID Lamp Ballast Small-Signal Model Analysis and Design of High-Intensity-Discharge Lamp Ballast for Automotive Headlamp Thesis Master of Science masters Virginia Polytechnic Institute and State University Electrical and Computer Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/661452025-08-28T17:38:38Zcom_10919_5532col_10919_64847

Henson, J. B. Dollahite, J. W. Bridges, C. Rao, R. R. Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase 2016-04-19T18:56:17Z 2016-04-19T18:56:17Z 1965 1438 Journal of the American Veterinary Medical Association 147(2): 142-145 0003-1488 http://hdl.handle.net/10919/66145 Metadata only record Widespread skeletal myodegeneration in cattle was associated with a disease syndrome characterized by an afebrile course, abnormally dark red urine, incoordination, recumbency, and death. The plants Cassia occidentalis or Cassia obtusifolia grew in the pastures and has been grazed by affected cattle, and appeared to have caused the disease. text/plain en American Veterinary Medical Association Grazing Cattle Cassia Obtusifolia Myodegeneration Field Scale Myodegeneration in cattle grazing Cassia species Abstract Textmetadata.only

oai:vtechworks.lib.vt.edu:10919/296032024-04-24T20:39:01Zcom_10919_5534col_10919_11041

Witt, Kathy Educational Leadership and Policy Studies Craig, James Richard Earthman, Glen I. Sellers, James L. Tripp, Norman Wayne 2014-03-14T20:18:35Z 2014-03-14T20:18:35Z 2011-11-01 2011-11-15 2011-12-05 2011-12-05 etd-11152011-123804 http://hdl.handle.net/10919/29603 http://scholar.lib.vt.edu/theses/available/etd-11152011-123804/ In the early 1970s, Henry County, Virginia experienced rapid growth but by the late 1970s the population began to decline. In 1982, talks of building a new high school to consolidate two smaller high schools began with the school to be built on the North Carolina boarder. Between 1993 and 2003 approximately 10,523 jobs were lost in Henry County. At this time Henry County operated 20 public schools. In 2000, Dr. Sharon Dodson became the superintendent of Henry County. She was hired to make schools more efficient by using the best available spaces and closing facilities in need of structural repair. In 2001 the school board voted to close three schools but the board of supervisors refused necessary funding for consolidation. During the 2003/04 school year, the school board had no other choice but to revisit the idea of consolidation. In the fall of 2004, reconfiguration occurred which eliminated four facilities with a fifth building closing in the spring of 2008. Today, Henry County operates 14 schools. This study examined the politics associated with the consolidation process in Henry County and closure of five facilities. The literature associated with consolidation concerning divisions and schools within a division was reviewed to provide context and better understanding of the consolidation process. Historical case study methods where employed to conduct the study. Data were collected from primary sources and interviews were handled qualitatively. Triangulation verification techniques were used to describe and verify consolidation events in Henry County. The findings express the issues and challenges faced and met by Henry County during consolidation. The events that led to school closings and some course offerings and programs are described. The findings indicate that consolidation can be successful even when some stakeholders reject the idea and plan of consolidation. Continued research in the field of consolidation could possibly benefit educational and community leaders considering reconfiguration within a school division. Additional research comparing the cost of operating a division before and after consolidation of schools may provide insights that educational and community members should consider before embarking on consolidation. Ed. D. Virginia Tech Witt_K_D_2011.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ Consolidation and Per Pupil Cost Consolidation in the Henry County Public School System Dissertation Doctor of Education doctoral Virginia Polytechnic Institute and State University Educational Leadership and Policy Studiesopen.access

oai:vtechworks.lib.vt.edu:10919/1309912025-05-09T16:00:24Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Flora, J. B. 2025-05-09T14:27:21Z 2025-05-09T14:27:21Z 1959 vcest122113 https://hdl.handle.net/10919/130991 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture reports field crops livestock Virginia Agricultural Extension Service West Central District Agent Plan of Work for 1959 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/555592025-08-28T17:38:38Zcom_10919_5523col_10919_5548

Virginia Cooperative Extension Service Huff, Arden N. 2015-08-05T19:33:07Z 2015-08-05T19:33:07Z 1976-08 http://hdl.handle.net/10919/55559 20 pages application/pdf en Virginia Cooperative Extension Service Record Book ; 105 Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. LD5655.A761 R38 Horses Virginia 4-H Horse Project. Horses Are Fun Virginia 4-H Horse Project Horses Are Fun Extension publication Text Virginia United States Reprintopen.access

oai:vtechworks.lib.vt.edu:10919/1077502025-02-19T14:14:50Zcom_10919_5com_10919_25799com_10919_24235com_10919_5532col_10919_70873col_10919_24309

Lopez, Lorena Liburd, Oscar 2022-01-18T14:54:08Z 2022-01-18T14:54:08Z 2021-07 2022-01-18T14:54:04Z http://hdl.handle.net/10919/107750 Lopez, Lorena [0000-0003-3123-3715] Florida (USA) is a major producer of squash, Cucurbita pepo L. (Cucurbitaceae), with approximated 16% of the US production in 2019, valued at about 35 million USD. Major insect pests, including the sweetpotato whitefly MEAM1, Bemisia tabaci Gennadius (Hemiptera: Aleyrodidae), and the melon aphid, Aphis gossypii Glover (Hemiptera: Aphididae), jeopardize plant development and transmit viruses of economic importance that can cause up to 50% yield loss in squash crops. Pesticides are generally used for insect management in squash, but the development of insecticide resistance and their non-target effects are major concerns. A combination of non-pesticidal approaches was evaluated, including intercropping flowering plants, augmentation, and conservation biological control to manage key pests in organic squash. Refugia increased natural enemies around the squash; however, only a few beneficial arthropods moved from the companion plants towards the squash plants. Whitefly densities and squash silverleaf ratings were reduced, whereas natural enemies were more abundant when the predatory mite Amblyseius swirskii Athias-Henriot (Acari: Phytoseiidae) was released alone or together with sweet alyssum, Lobularia maritima (L.) Desv. (Brassicaceae). All companion plants used in this study increased natural enemies, but only African marigolds and sweet alyssum ultimately increased biological control activities. Accepted version application/pdf en In Copyright http://rightsstatements.org/vocab/InC/1.0/ Can the introduction of companion plants increase biological control services of key pests in organic squash? Entomologia Experimentalis et Applicata Article - Refereed Article Text 2021-09-09 /Virginia Tech /Virginia Tech/Agriculture & Life Sciences /Virginia Tech/Agriculture & Life Sciences/Eastern Shore ARECopen.access

oai:vtechworks.lib.vt.edu:10919/282972024-04-24T17:54:54Zcom_10919_5534col_10919_11041

El-Nainay, Mustafa Y. Electrical and Computer Engineering MacKenzie, Allen B. El-Derini, Mohamed N. DaSilva, Luiz A. Bostian, Charles W. Aly, Hussien H. Midkiff, Scott F. Marathe, Madhav V. 2014-03-14T20:14:02Z 2014-03-14T20:14:02Z 2009-07-01 2009-07-14 2009-07-24 2009-07-24 etd-07142009-101727 http://hdl.handle.net/10919/28297 http://scholar.lib.vt.edu/theses/available/etd-07142009-101727/ The heterogeneity and complexity of modern communication networks demands coupling network nodes with intelligence to perceive and adapt to different network conditions autonomously. Cognitive Networking is an emerging networking research area that aims to achieve this goal by applying distributed reasoning and learning across the protocol stack and throughout the network. Various cognitive node and cognitive network architectures with different levels of maturity have been proposed in the literature. All of them adopt the idea of coupling network devices with sensors to sense network conditions, artificial intelligence algorithms to solve problems, and a reconfigurable platform to apply solutions. However, little further research has investigated suitable reasoning and learning algorithms. In this dissertation, we take cognitive network research a step further by investigating the reasoning component of cognitive networks. In a deviation from previous suggestions, we suggest the use of a single flexible distributed reasoning algorithm for cognitive networks. We first propose an architecture for a cognitive node in a cognitive network that is general enough to apply to future networking challenges. We then introduce and justify our choice of the island genetic algorithm (iGA) as the distributed reasoning algorithm. Having introduced our cognitive node architecture, we then focus on the applicability of the island genetic algorithm as a single reasoning algorithm for cognitive networks. Our approach is to apply the island genetic algorithm to different single and cross layer communication and networking problems and to evaluate its performance through simulation. A proof of concept cognitive network is implemented to understand the implementation challenges and assess the island genetic algorithm performance in a real network environment. We apply the island genetic algorithm to three problems: channel allocation, joint power and channel allocation, and flow routing. The channel allocation problem is a major challenge for dynamic spectrum access which, in turn, has been the focal application for cognitive radios and cognitive networks. The other problems are examples of hard cross layer problems. We first apply the standard island genetic algorithm to a channel allocation problem formulated for the dynamic spectrum cognitive network environment. We also describe the details for implementing a cognitive network prototype using the universal software radio peripheral integrated with our extended implementation of the GNU radio software package and our island genetic algorithm implementation for the dynamic spectrum channel allocation problem. We then develop a localized variation of the island genetic algorithm, denoted LiGA, that allows the standard island genetic algorithm to scale and apply it to the joint power and channel allocation problem. In this context, we also investigate the importance of power control for cognitive networks and study the effect of non-cooperative behavior on the performance of the LiGA. The localized variation of the island genetic algorithm, LiGA, is powerful in solving node-centric problems and problems that requires only limited knowledge about network status. However, not every communication and networking problems can be solved efficiently in localized fashion. Thus, we propose a generalized version of the LiGA, namely the K-hop island genetic algorithm, as our final distributed reasoning algorithm proposal for cognitive networks. The K-hop island genetic algorithm is a promising algorithm to solve a large class of communication and networking problems with controllable cooperation and migration scope that allows for a tradeoff between performance and cost. We apply it to a flow routing problem that includes both power control and channel allocation. For all problems simulation results are provided to quantify the performance of the island genetic algorithm variation. In most cases, simulation and experimental results reveal promising performance for the island genetic algorithm. We conclude our work with a discussion of the shortcomings of island genetic algorithms without guidance from a learning mechanism and propose the incorporation of two learning processes into the cognitive node architecture to solve slow convergence and manual configuration problems. We suggest the cultural algorithm framework and reinforcement learning techniques as candidate leaning techniques for implementing the learning processes. However, further investigation and implementation is left as future work. Ph. D. Virginia Tech MustafaElNainay_IslandGeneticAlgorithmbasedCognitiveNetworks.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ channel allocation power control flow routing cognitive networks island genetic algorithm distributed reasoning and learning dynamic spectrum access Island Genetic Algorithm-based Cognitive Networks Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Electrical and Computer Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/795112025-08-20T17:09:12Zcom_10919_24253com_10919_5555com_10919_79468com_10919_78628col_10919_24327col_10919_79480

Virginia Tech Zanotti, Laura Stephenson, Max O. Jr. Schnitzer, Marcy H. 2017-10-05T18:54:35Z 2017-10-05T18:54:35Z 2015-03-25 http://hdl.handle.net/10919/79511 https://doi.org/10.1080/13533312.2015.1017082 22 2 The peacebuilding political rationality established in the first years of the current century broadened the target of such efforts from state institutions to populations and adopted an array of disciplinary and biopolitical techniques aimed at changing individuals and the ways they live together. This article explores international organization discourses on sport and peacebuilding and argues that the broad consensus on sport as a peacebuilding strategy is most fruitfully explored in light of the intensification of the biopolitical and disciplinary trajectories of the liberal peace. Published version application/pdf en Taylor & Francis In Copyright http://rightsstatements.org/vocab/InC/1.0/ Biopolitical and Disciplinary Peacebuilding: Sport, Reforming Bodies and Rebuilding Societies International Peackeeping Article - Refereed Textopen.access

oai:vtechworks.lib.vt.edu:10919/1359842025-07-14T21:00:21Zcom_10919_121368com_10919_121365com_10919_11358col_10919_135978

Virginia Tech. Commission on Equal Opportunity and Diversity 2025-07-14T17:46:36Z 2025-07-14T17:46:36Z 2020-02-25 https://hdl.handle.net/10919/135984 3 pages application/pdf en Virginia Tech In Copyright (InC) http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech Commission on Equal Opportunity and Diversity: February 25, 2020 Meeting minutes Textopen.access

oai:vtechworks.lib.vt.edu:10919/1259272025-04-24T21:00:25Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Allen, A. V. 2025-04-24T17:19:50Z 2025-04-24T17:19:50Z 1939 vcest062004 https://hdl.handle.net/10919/125927 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture field crops livestock Annual narrative report of extension work, Grayson county, Virginia Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/869662024-12-17T20:37:08Zcom_10919_111117com_10919_111116com_10919_5555col_10919_111122

Harrell, Sara Coles, Ann 2019-01-25T16:46:10Z 2019-01-25T16:46:10Z 2015 2018-08-22 http://hdl.handle.net/10919/86966 https://www.nacacnet.org/globalassets/documents/publications/research/excelencia.pdf The Hispanic population represents a significant portion of American society. With regard to postsecondary enrollment, this ethnic group will experience the largest growth among all racial and ethnic groups and grow by 27% between 2011 and 2022. In order to understand the role of the school counselor in preparing Latino and other underrepresented students for the transition to college, Excelencia in Education and NACAC conducted a national survey and observed counseling practices at six US high schools that were successfully supporting underrepresented populations during the college application process. National Association for College Admission Counseling (NACAC) Excelencia in Education application/pdf en National Association for College Admission Counseling (NACAC) American School Counselor Association (ASCA) Creative Commons Attribution-NoDerivatives 4.0 International http://creativecommons.org/licenses/by-nd/4.0/ college application process Latin American students college enrollment counseling in higher education College Counseling for Latino and Underrepresented Students Report Textopen.access

oai:vtechworks.lib.vt.edu:10919/1008142024-12-17T20:37:08Zcom_10919_11358col_10919_97217

2020-11-10T13:38:28Z 2020-11-10T13:38:28Z 2020-11-04 http://hdl.handle.net/10919/100814 https://graduateschool.vt.edu/content/dam/graduateschool_vt_edu/graduate-ed-task-force-report/final-getf-report-public-version-11-04-20.pdf In late spring of 2019, a group of faculty members, staff, and graduate students from across Virginia Tech’s colleges received a charge from Provost Cyril Clarke and Vice President and Dean for Graduate Education Karen P. DePauw: Conduct a comparative analysis of Virginia Tech’s research-based graduate education programs relative to peer land-grant universities across the nation and draft recommendations for further enhancement. This report details their findings. application/pdf en Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Report of the Graduate Education Task Force (GETF) Report Textopen.access

oai:vtechworks.lib.vt.edu:10919/1171912024-11-22T15:55:01Zcom_10919_8195com_10919_25799com_10919_18738com_10919_5539col_10919_78882col_10919_23145

Ambarkutuk, Murat Alajlouni, Sa’ed Tarazaga, Pablo Alberto Plassmann, Paul E. 2023-12-14T13:02:46Z 2023-12-14T13:02:46Z 2023-11-21 2023-12-13T14:23:42Z Ambarkutuk, M.; Alajlouni, S.; Tarazaga, P.A.; Plassmann, P.E. A Multi-Sensor Stochastic Energy-Based Vibro-Localization Technique with Byzantine Sensor Elimination. Sensors 2023, 23, 9309. https://hdl.handle.net/10919/117191 https://doi.org/10.3390/s23239309 This paper presents an occupant localization technique that determines the location of individuals in indoor environments by analyzing the structural vibrations of the floor caused by their footsteps. Structural vibration waves are difficult to measure as they are influenced by various factors, including the complex nature of wave propagation in heterogeneous and dispersive media (such as the floor) as well as the inherent noise characteristics of sensors observing the vibration wavefronts. The proposed vibration-based occupant localization technique minimizes the errors that occur during the signal acquisition time. In this process, the likelihood function of each sensor&mdash;representing where the occupant likely resides in the environment&mdash;is fused to obtain a consensual localization result in a collective manner. In this work, it becomes evident that the above sources of uncertainties can render certain sensors deceptive, commonly referred to as &ldquo;Byzantines.&rdquo; Because the ratio of Byzantines among the set sensors defines the success of the collective localization results, this paper introduces a Byzantine sensor elimination (BSE) algorithm to prevent the unreliable information of Byzantine sensors from affecting the location estimations. This algorithm identifies and eliminates sensors that generate erroneous estimates, preventing the influence of these sensors on the overall consensus. To validate and benchmark the proposed technique, a set of previously conducted controlled experiments was employed. The empirical results demonstrate the proposed technique&rsquo;s significant improvement (<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mover><mn>3</mn><mo stretchy="false">~</mo></mover></semantics></math></inline-formula>0%) over the baseline approach in terms of both accuracy and precision. Published version application/pdf en MDPI Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ occupant localization structural vibrations sensor fusion Byzantine sensor elimination A Multi-Sensor Stochastic Energy-Based Vibro-Localization Technique with Byzantine Sensor Elimination Sensors Article - Refereed Textopen.access

oai:vtechworks.lib.vt.edu:10919/131112024-04-22T09:13:26Zcom_10919_11335com_10919_25799col_10919_11385

John's Camera Corner by Jimmie Elwell Northern Virginia Community College, Manassas 2012-03-12T15:05:58Z 2012-03-12T15:05:58Z 2007 2012-03-12 prevails1B00579 S1L1B0579 http://hdl.handle.net/10919/13111 image/jpeg Digital Library and Archives, University Libraries, Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Banner from Northern Virginia Community College-Manassas Campus Banner Image Image Manassas Virginia United States 20109open.access

oai:vtechworks.lib.vt.edu:10919/925882024-08-27T17:50:14Zcom_10919_5534col_10919_11041

Feng, Xuewen Plant Pathology, Physiology and Weed Science Baudoin, Antonius B. Haak, David C. Vinatzer, Boris A. Nita, Mizuho Schmale, David G. III 2019-08-01T06:00:47Z 2019-08-01T06:00:47Z 2018-02-06 vt_gsexam:13603 http://hdl.handle.net/10919/92588 Development of fungicide resistance in fungal and oomycete pathogens is a serious problem in grape production. Quinoxyfen is a fungicide widely used against grape powdery mildew (Erysiphe necator). In 2013, E. necator isolates with reduced quinoxyfen sensitivity (designated as quinoxyfen lab resistance or QLR) were detected in Virginia. Field trials were conducted in 2014, 2015, and 2016 at the affected vineyard to determine to what extent quinoxyfen might still contribute to disease control. Powdery mildew control by quinoxyfen was good, similar to, or only slightly less, than that provided by myclobutanil and boscalid in all three years. The frequency of QLR in vines not treated with quinoxyfen declined only slowly over the three years, from 65% to 46%. Information about the mode of action of quinoxyfen is limited; previous research suggests that quinoxyfen interferes with the signal transduction process. We profiled the transcriptomes of QLR and sensitive isolates in response to quinoxyfen treatment, providing support for this hypothesis. Additional transcriptional targets of quinoxyfen were revealed to be involved in the positive regulation of the MAPK signaling cascade, pathogenesis, and sporulation activity. Grape downy mildew (Plasmopara viticola), another important grape pathogen, is commonly controlled by phosphite fungicides. A field trial and laboratory bioassays were conducted to determine whether P. viticola isolates from vineyards with suspected control failures showed reduced sensitivity against phosphite fungicides. Prophyt applied at 14-day intervals under high disease pressure provided poor downy mildew control in the field. Next-generation sequencing technologies were utilized to identify 391,930 single nucleotide polymorphisms (SNPs) and generated a draft P. viticola genome assembly at ~130 megabase (Mb). Finally, field isolates of P. viticola collected from a Virginia vineyard with suspected mandipropamid control failure were bioassayed. The EC50 values of the isolates were >240 μg.ml-1 for mandipropamid, well above the field rate. The PvCesA3 gene of two resistant isolates was sequenced revealing that these isolates had a GGC-to-AGC substitution at codon 1105, the same mutation that has been found associated with CAA resistance elsewhere. PHD Powdery and downy mildew are two diseases of grapes that can cause large yield losses, and are usually controlled by regular fungicide applications. Development of fungicide resistance has been a growing challenge. Quinoxyfen is a protectant fungicide commonly used against powdery mildews. Unusual grape powdery mildew isolates that grew well on quinoxyfen-treated plants in the laboratory (designated as quinoxyfen lab resistance or QLR) were detected in a Virginia vineyard. In 2014, the first year of this study, 65% of powdery mildew isolates from parts of this vineyard that received no further quinoxyfen treatments had the QLR type of resistance, and this declined only slowly to 46% by the third year. Field trials were conducted in 2014, 2015, and 2016 to determine the efficacy of quinoxyfen in the presence of QLR. Powdery mildew control by quinoxyfen on both grape clusters and leaves was similar to, or only slightly less, than that provided by the standard anti-powdery mildew fungicides myclobutanil and boscalid in all three years. In order to gain a better understanding of the mode(s) of action and resistance mechanism(s) of quinoxyfen, gene expression of QLR and sensitive isolates, both in the presence and absence of quinoxyfen, was analyzed by nucleic acid sequencing. This study confirms previous research suggesting that quinoxyfen interferes with the important biological process signal transduction, and revealed additional gene targets of quinoxyfen. The phosphites are a group of fungicides commonly used to control grape downy mildew. Control failures after phosphite application have occasionally been suspected, and downy mildew isolates from vineyards with and without suspected control failures were tested in laboratory bioassays to determine if any level of resistance could be demonstrated. There was a limited range of sensitivity, and none of the isolates showed a notable loss of sensitivity. A field trial was conducted to determine the efficacy of one phosphite fungicide, Prophyt, applied at 14-day intervals under conditions favorable for disease development. Prophyt provided poor downy mildew control, suggesting that it has to be applied more frequently. Next-generation sequencing technologies were utilized to identify genetic markers for clade identification and generated a draft genome assembly of grape downy mildew, which improves the understanding of grape downy mildew genome. Grape downy mildew isolates collected from a vineyard in Virginia where mandipropamid provided poor control of downy mildew were bioassayed. The isolates tolerated mandipropamid rates well above the field rate, showing that they were indeed resistant. The mutation that confers mandipropamid resistance on other continents was found in the PvCesA3 gene of two resistant isolates. ETD Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Erysiphe necator Plasmopara viticola grape powdery mildew grape downy mildew fungicide resistance quinoxyfen Prophyt mandipropamid RNA-seq whole genome sequencing single nucleotide polymorphism (SNP) Characterization of fungicide resistance in grape powdery and downy mildew using field trials, bioassays, genomic, and transcriptomic approaches: quinoxyfen, phosphite, and mandipropamid Dissertation PHD doctoral Virginia Polytechnic Institute and State University Plant Pathology, Physiology and Weed Scienceopen.access

oai:vtechworks.lib.vt.edu:10919/813842024-04-28T21:35:44Zcom_10919_5534col_10919_11041

Bonakdar, Mohammad Mechanical Engineering Davalos, Rafael V. Verbridge, Scott Paul, Mark R. Bickford, Lissett R. Lee, Yong Woo 2017-12-22T07:00:28Z 2017-12-22T07:00:28Z 2016-06-29 vt_gsexam:8241 http://hdl.handle.net/10919/81384 Recent attempts to investigate living systems from a biophysical point of view has opened new windows for development of new diagnostic methods and therapies. Pulsed electric fields (PEFs) are a new class of therapies that take advantage of biophysical properties and have proven to be effective in drug delivery and treating several disorders including tumors. While animal models are commonly being used for development of new therapies, the high cost and complexity of these models along with the difficulties to control the electric field in the animal tissue are some of the obstacles toward the development of PEFs-based therapies. Microengineered models of organs or Organs-on-Chip have been recently introduced to overcome the hurdles of animal models and provide a flexible and cost-effective platform for early investigation of a variety of new therapies. In this study microfluidic platforms with integrated micro-sensors were designed, fabricated and employed to study the consequences of PEFs at the cellular level. These platforms were specifically used to study the effects of PEFs on the permeabilization of the blood-brain barrier for enhanced drug delivery to the brain. Different techniques such as fluorescent microscopy and electrical impedance spectroscopy were used to monitor the response of the cell monolayers under investigation. Irreversible electroporation is a new focal ablation therapy based on PEFs that has enabled ablation of tumors in a non-thermal, minimally invasive procedure. Despite promising achievements and treatment of more than 5500 human patients by this technique, real-time monitoring of the treatment progress in terms of the size of the ablated region is still needed. To address that necessity we have developed micro-sensor arrays that can be implemented on the ablation probe and give real-time feedback about the size of the ablated region by measuring the electrical impedance spectrum of the tissue. Ph. D. ETD Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Blood-brain barrier Electroporation Microfluidics Drug delivery Electrical impedance spectroscopy Microdevices for Investigating Pulsed Electric Fields-Mediated Therapies at Cellular and Tissue Level Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Mechanical Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/1285482025-05-01T21:00:20Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Hale, Janie C. 2025-05-01T17:47:39Z 2025-05-01T17:47:39Z 1951 vcest097005 https://hdl.handle.net/10919/128548 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture field crops livestock Agricultural Extension Service Home Demonstration Work Annual Narrative Report for Stafford County, Virginia 1951 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/624442020-10-09T20:59:53Zcom_10919_86184com_10919_11358col_10919_86187

Trulove, Susan Blacksburg, Va. 2015-10-29T21:35:42Z 2015-10-29T21:35:42Z 2009-10-22 http://hdl.handle.net/10919/62444 In the course of doing research on the mosquito-borne pathogens chikungunya virus (CHIKV) and o' nyong-nyong virus (ONNV), Virginia Tech researchers have discovered an inconvenient truth about an assay, strand-specific quantitative real-time PCR (ssqPCR), increasingly being used to detect and measure replicating viral RNA in infected cells and tissues. The method most labs are using for ssqPCR is unreliable. text/html Virginia Tech. University Relations In Copyright http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech. University Relations Research Widely-used virus assay shown unreliable when compared to other methods Press release Textopen.access

oai:vtechworks.lib.vt.edu:10919/687242025-08-28T17:38:38Zcom_10919_5532col_10919_64847

Bissett, M. J. O'Leary, G. J. Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase Southeastern Australia 1980 - 1990 2016-04-19T20:07:09Z 2016-04-19T20:07:09Z 1996 4422 Australian Journal of Soil Research 34(2): 299-308 0004-9573 1446-568X http://hdl.handle.net/10919/68724 https://doi.org/10.1071/SR9960299 Metadata only record This paper reports on a study in Southeast Australia comparing water infiltration on two soil types (gray cracking clay and sandy loam) under two tillage systems - conservation tillage (zero and sub-soil, residues retained) and conventional tillage (frequently tined tillage, no surface residues). The objective of the study is to determine if conservation tillage increases the water infiltration rate on two different soils, with the hope of better explaining the mechanism for previously observed increases in soil water storage. text/plain en CSIRO Publishing In Copyright http://rightsstatements.org/vocab/InC/1.0/ Copyright CSIRO 1996 Surface water Soil management Semiarid zones Conservation tillage Disc permeameter Hydraulic conductivity Soil water Field Scale Effects of conservation tillage on water infiltration in two soils in south-eastern Australia Abstract Textmetadata.only

oai:vtechworks.lib.vt.edu:10919/733122024-04-07T03:35:07Zcom_10919_5534col_10919_11041

Zheng, Hanguang Materials Science and Engineering Lu, Guo Quan Ngo, Khai D. Guido, Louis J. Aning, Alexander O. 2016-10-21T06:00:19Z 2016-10-21T06:00:19Z 2015-04-29 vt_gsexam:5067 http://hdl.handle.net/10919/73312 Die-attachment, as the first level of electronics packaging, plays a key role for the overall performance of the power electronics packages. Nanosilver sintering has becoming an emerging solder-free, environmental friendly die-attach technology. Researchers have demonstrated the feasibility of die-attachment on silver (Ag) or gold (Au) surfaces by pressure-less or low-pressure (< 5 MPa) nanosilver sintering. This study extended the application of nanosilver sintering die-attach technique to copper (Cu) surface. The main challenge of nanosilver sintering on Cu is the formation of thick Cu oxide during processing, which may lead to weak joints. In this study, different processes were developed based on the die size: for small-area dice (< 5 * 5 mm2), different sintering atmospheres (e.g. forming gas) were applied to protect Cu surface from oxidation; for large-area dice (> 5 * 5 mm2), a double-print, low-pressure (< 5 MPa) assisted sintering process was developed. For both processes, die-shear tests demonstrated die-shear strength can reach 40 MPa. The effects of different sintering parameters of the processing were analyzed by different material characterization techniques. With forming gas as sintering atmosphere, not only Cu surface was protected from oxidation, but also the organics in the paste were degraded with nanosilver particles as catalyst. External pressure applied in the processing not only increased the density of sintered Ag, but also enhanced the contact area of sintered-Ag/Cu interface. Microstructure of Ag/Cu interface were characterized by transmission electron microscopy (TEM). Characterization results indicate that Ag/Cu metallic bonds formed at the interface, which verified the high die-shear strength of the die-attachment. Thermal performance of nanosilver sintered die-attachment on Cu was evaluated. A system was designed and constructed for measuring both transient thermal impedance (Zth) and steady-state thermal resistance (Rth) of insulated gate bipolar transistor (IGBT) packages. The coefficient of variation (CV) of Zth measurement by the system was lower than 0.5%. Lead-free solder (SAC305) was applied in comparison of thermal performance with nanosilver paste. With same sample geometry and heating power level, nanosilver sintered joints on Cu showed in average 12.6% lower Zth and 20.1% lower Rth than SAC305 soldered joints. Great thermal performances of nanosilver sintering die-attachment on Cu were mainly due to the low thermal resistivity of sintered-Ag and the good bonding quality. Both passive temperature cycling and active power cycling tests were conducted to evaluate the reliability of nanosilver sintered joints on Cu. For passive temperature cycling tests (-40 - 125 C), the die-shear strengths of mechanical samples had no significant drop over 1000 cycles, and nanosilver sintered IGBT on Cu packages showed almost no change on Zth after 800 cycles. For active power cycling test (Tj = 45 - 175 C), nanosilver sintered IGBT on Cu assembly had a lifetime over 48,000 cycles. The failure point of the assembly was the detachment of the wirebonds. Great reliability performances of nanosilver sintered die-attachment on Cu were mainly due to the low mismatch of coefficient of thermal expansion (CTE) between sintered-Ag and Cu. Meanwhile, low inter-diffusion rate between Ag and Cu prevented the interface from the reliability issue related to Kirkendall voids, which often took place in tin (Sn) -based solder joints. Ph. D. ETD Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Die-attachment nanosilver sintering copper processing characterization reliability. Die-Attachment on Copper by Nanosilver Sintering: Processing, Characterization and Reliability Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Materials Science and Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/660212025-08-28T17:38:38Zcom_10919_5532col_10919_64847

Roe, E. Huntsinger, L. Labnow, K. Sustainable Agriculture and Natural Resource Management (SANREM) Knowledgebase 2016-04-19T18:55:55Z 2016-04-19T18:55:55Z 1998 1314 Journal of Arid Environments 39(1): 39-55 0140-1963 http://hdl.handle.net/10919/66021 https://doi.org/10.1006/jare.1998.0375 Metadata only record In contrast to the view of pastoralism as being driven by risk aversion, new disequilibrium-based models of ecological dynamics on rangelands enable us to see pastoralism as what organization theorists term as high reliability institution. Such institutions seek and attain reliable peak performance by managing highly complex technologies to better manage risk. Nine features of high-reliability organizations are described and linked to published observations of pastoralist organization and practice. Although superficially similar, thinking of pastoralist objectives in terms of searching for reliability, rather than escaping from hazard, has important implications for interpreting pastoralist behavior, and for development policy. --co. 1998 Academic Press Limited text/plain en Academic Press Limited In Copyright http://rightsstatements.org/vocab/InC/1.0/ Copyright 1998 Academic Press Limited Vulnerability and risk Over grazing Livestock Pastoralism Risk aversion International development High reliability Ecosystem High reliability pastoralism Abstract Textmetadata.only

oai:vtechworks.lib.vt.edu:10919/189192023-12-11T16:08:07Zcom_10919_8195com_10919_25799com_10919_25796col_10919_18629col_10919_25797

Torto-Alalibo, Trudy Collmer, Candace W. Lindeberg, Magdalen Bird, David Collmer, Alan Tyler, Brett M. 2012-08-24T12:10:33Z 2012-08-24T12:10:33Z 2009-02-19 2012-08-24T12:10:33Z BMC Microbiology. 2009 Feb 19;9(Suppl 1):S3 http://hdl.handle.net/10919/18919 https://doi.org/10.1186/1471-2180-9-S1-S3 A wide diversity of plant-associated symbionts, including microbes, produce proteins that can enter host cells, or are injected into host cells in order to modify the physiology of the host to promote colonization. These molecules, termed effectors, commonly target the host defense signaling pathways in order to suppress the defense response. Others target the gene expression machinery or trigger specific modifications to host morphology or physiology that promote the nutrition and proliferation of the symbiont. When recognized by the host's surveillance machinery, which includes cognate resistance (R) gene products, defense responses are engaged to restrict pathogen proliferation. Effectors from diverse symbionts may be delivered into plant cells via varied mechanisms, including whole organism cellular entry (viruses, some bacteria and fungi), type III and IV secretion (in bacteria), physical injection (nematodes and insects) and protein translocation signal sequences (oomycetes and fungi). This mini-review will summarize both similarities and differences in effectors and effector delivery systems found in diverse plant-associated symbionts as well as how these are described with Plant-Associated Microbe Gene Ontology (PAMGO) terms. Published version application/pdf en Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ Trudy Torto-Alalibo et al.; licensee BioMed Central Ltd. Common and contrasting themes in host cell-targeted effectors from bacterial, fungal, oomycete and nematode plant symbionts described using the Gene Ontology BMC Microbiology Article - Refereed Textopen.access

oai:vtechworks.lib.vt.edu:10919/1428182026-04-08T21:00:11Zcom_10919_121368com_10919_121365com_10919_11358col_10919_137295

Virginia Tech. Commission on Outreach and International Affairs 2026-04-08T17:14:41Z 2026-04-08T17:14:41Z 2023-09-21 https://hdl.handle.net/10919/142818 23 pages 1 page application/pdf en Virginia Tech In Copyright (InC) http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech Commission on Outreach and International Affairs: September 21, 2023 Meeting minutes Textopen.access

oai:vtechworks.lib.vt.edu:10919/1333232025-05-20T16:00:20Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Nottingham, Roy U. Revell, Catherine W. Schools, Russell C. 2025-05-20T12:15:41Z 2025-05-20T12:15:41Z 1962 vcest135066 https://hdl.handle.net/10919/133323 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture reports field crops livestock Combined Annual Report of Agricultural And Home Demonstration Extension Service in Northampton County, Virginia 1962 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/259182025-08-20T17:09:12Zcom_10919_18738com_10919_5539com_10919_24211com_10919_5553col_10919_23145col_10919_24287

Virginia Tech Kandas, Ishac L. N. Zhang, Baigang Daengngam, Chalongrat Ashry, Islam Jao, Chih-Yu Peng, Bo Ozdemir, Sahin K. Robinson, Hans D. Heflin, James R. Yang, Lan Xu, Yong Electrical and Computer Engineering Physics 2014-03-14T15:08:14Z 2014-03-14T15:08:14Z 2013-09-01 2014-02-06 Ishac Kandas, Baigang Zhang, Chalongrat Daengngam, Islam Ashry, Chih-Yu Jao, Bo Peng, Sahin K. Ozdemir, Hans D. Robinson, James R. Heflin, Lan Yang, and Yong Xu, "High quality factor silica microspheres functionalized with self-assembled nanomaterials," Opt. Express 21, 20601-20610 (2013); doi: 10.1364/oe.21.020601 1094-4087 http://hdl.handle.net/10919/25918 http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-21-18-20601 https://doi.org/10.1364/oe.21.020601 With extremely low material absorption and exceptional surface smoothness, silica-based optical resonators can achieve extremely high cavity quality (Q) factors. However, the intrinsic material limitations of silica (e. g., lack of second order nonlinearity) may limit the potential applications of silica-based high Q resonators. Here we report some results in utilizing layer-by-layer self-assembly to functionalize silica microspheres with nonlinear and plasmonic nanomaterials while maintaining Q factors as high as 10(7). We compare experimentally measured Q factors with theoretical estimates, and find good agreement. (C) 2013 Optical Society of America National Institute of Occupational Safety and Health 1U60OH009761-01 VT-MENA program U.S. Army Research Office W911NF-12-1-0026 Published version application/pdf en Optical Society of America In Copyright http://rightsstatements.org/vocab/InC/1.0/ Whispering-gallery modes Optical microcavities Surfaces Microresonators Resonators Adsorption Scattering Molecules High quality factor silica microspheres functionalized with self-assembled nanomaterials Optics Express Article - Refereed Textopen.access

oai:vtechworks.lib.vt.edu:10919/1298542025-05-08T16:00:22Zcom_10919_5523col_10919_119164

Virginia Cooperative Extension Goode, F. B. 2025-05-08T13:35:54Z 2025-05-08T13:35:54Z 1955 vcest111034 https://hdl.handle.net/10919/129854 The agent's annual report proving complete summary of all the work performed during the year. This would include but not limited to systematic records of notes of tasks completed, brief observations of general conditions observed, as well as detailed information regarding certain localities. application/pdf en Virginia Cooperative Extension Virginia Cooperative Extension materials are available for public use, re-print, or citation without further permission, provided the use includes credit to the author and to Virginia Cooperative Extension, Virginia Tech, and Virginia State University. Virginia Cooperative Extension Service agriculture field crops livestock Local Farm Agent F.B. Goode's Combined Annual Statistical Report of County Extension Workers in Gloucester County, Virginia 1955 Annual Narratives & Statistical Reports from state offices and county agents Report Text Virginia United Statesopen.access

oai:vtechworks.lib.vt.edu:10919/97102024-04-29T05:25:27Zcom_10919_5534col_10919_9291

Warner, Sandra McCarthy Geosciences Burbey, Thomas J. Blewitt, Geoff Schreiber, Madeline E. 2011-08-06T14:45:40Z 2011-08-06T14:45:40Z 2000-09-19 2004-01-26 2004-02-11 2004-02-11 etd-01262004-202558 http://hdl.handle.net/10919/9710 http://scholar.lib.vt.edu/theses/available/etd-01262004-202558 The horizontal component of land subsidence is typically assumed to be negligible, although recently, theoretical simulations have shown that horizontal strain is significant. A field based investigation in Mesquite, NV, was undertaken from May to July, 2003, for the purpose of evaluating the significance of horizontal strain during an aquifer test. The hydraulic heads in the aquifer were monitored within a meter of the municipal pumping well used for the aquifer test and also at a distance of approximately 1,470 meters from the pumping well. Aquifer deformation in the horizontal and vertical directions were measured using GPS for the first 22 days of pumping in 10 different locations at radial distances from the well varying from 100 meters to 2500 meters. From 22 to 60 days of the aquifer test, the number of GPS stations monitoring deformation was reduced to five. Radial displacement was measured at all monitoring stations during the aquifer test, indicating that the aquifer is moving closer to the pumping well. The greatest magnitude displacement measured 140 m from the well was approximately 10 mm at the land surface. A zone of radial compression occurred between the pumping well and the first monitoring station 140 m away from the pumping well. Vertical displacement was measured in decreasing magnitude with increasing distance from the well. Because GPS is not as precise a tool in the vertical direction as it is in the horizontal, the vertical signal of displacement is not as accurate. Numerical simulations using the BIOT and IBS codes were performed to reproduce the aquifer test and land deformation. The model included six layers representing three hydrogeologic units: a bottom aquifer (four layers) in which pumping occurred , a top aquifer (one layer) in which the monitoring well was screened, and a semi-confining bed (one layer) between the two aquifers that represented an equivalent thickness of interbeds and clays layers. The Biot code was used to simulate radial and vertical movements in an axisymmetrical simulation, while the IBS code was used to simulate only vertical displacement but also provided for the simulation of elastic and inelastic storage and compression. The vertical distribution of radial displacement was simulated using the BIOT code. At the onset of pumping, the greatest radial displacement occurred in the bottom aquifer in which pumping occurred. At a distance of 2,000 m from the well, the radial displacement was uniform over all depths indicating that the differences in hydraulic diffusivity are not as important a factor at distance from the well. The change in porosity that occurred as a result of horizontal strain was greatest in the bottom aquifer. Using the strain calculated directly from the GPS measurements at the land surface, vertical strain comprised almost 99% of the volume strain at the land surface. However, when the strain was simulated over the entire aquifer system, the radial and hoop strain contributed more than vertical strain in the bottom aquifer at a radius of 100 m from the pumping well at the onset of pumping until the aquifer reached near equilibrium, at which time vertical strain again dominated. Master of Science ETD Virginia Tech warneretd.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ aquifer test GPS Muddy Creek subsidence horizontal deformation Using GPS to Quantify Three Dimensional Storage and Aquifer Deformation in the Virgin River Valley, NV Thesis Master of Science masters Virginia Polytechnic Institute and State University Geosciencesopen.access

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Jones, Letitia Power Environmental Sciences and Engineering 2019-01-31T18:27:17Z 2019-01-31T18:27:17Z 1982 http://hdl.handle.net/10919/87210 As a consequence of new coal mining practices, coal preparation plants have been inundated with increased loads of coal and clay particles in their wastewaters. Traditionally, the industry has employed primary sedimentation as the fundamental treatment scheme for these sediment-laden blackwaters. This study was undertaken to determine the effects of a combination of coagulant addition and rapid mixing on the settleability of these particles. After initial testing, aluminum sulfate and two low molecular weight cationic polymers, Cyanamid Magnifloc 513C and Cyanamid 515C, were chosen as primary coagulants for use in this work. An artificial wastewater was prepared from finely powdered (62 to <38 microns) raw coal samples and tap water, after initial tests indicated that typical frothing and/or collector agents had no demonstrable effect on coagulant function. Initially determined optimum coagulant dosages, as well as flocculation and sedimentation times, were kept constant while rapid mix intensities were varied at G values of 330 sec⁻¹, 700 sec⁻¹, 2000 sec⁻¹ and 7000 sec⁻¹ for each sample. Using a combination of residual turbidity and particle size analyses to determine the effectiveness of each rapid mix intensity, it was discovered that only the highest mixing intensities and durations (G(t) values) caused floe disintegration due to overmixing. At the lower G(t) matrices floe formation and settleability was consistently good. When aluminum sulfate was used as a coagulant, the wastewater was tested at a high pH of 8.1 to 8.3 and a low pH of 5.5 to observe floe behavior under different conditions of coagulant mechanism. The test results were similar for both pH values except at the lowest mixing intensities where the high pH samples settled well, resulting in low residual turbidities, but the low pH samples had relatively high turbidities. Master of Science ix, 99, [2] leaves application/pdf en Virginia Polytechnic Institute and State University OCLC# 8749129 In Copyright http://rightsstatements.org/vocab/InC/1.0/ LD5655.V855 1982.J663 Coal mines and mining -- Waste disposal Coal washing Water -- Purification -- Flocculation The effects of rapid mixing on the coagulation and sedimentation of ultra-fine coal and clay particles Thesis Text Master of Science masters Virginia Polytechnic Institute and State University Environmental Sciences and Engineeringopen.access

oai:vtechworks.lib.vt.edu:10919/1167512023-12-05T06:57:44Zcom_10919_97449com_10919_86778com_10919_11358col_10919_97450

2023-12-05T04:35:13Z 2023-12-05T04:35:13Z 2023-01-25 https://hdl.handle.net/10919/116751 20 3 Virginia Tech News is published weekly during fall and spring semester and bimonthly during the summer sessions, by the Division of Human Resources and the Office of University Relations as a service to university employees who do not have computer access on campus. 2 pages application/pdf en Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Virginia Tech News, January 25, 2023 Periodical Textopen.access

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Strozier, Jariah Li'Shey Sociology Baldwin, Andrea N. Precoda, Karl R. Labuski, Christine Brown, Letisha Faulkner, Brandy S. 2022-07-15T08:00:12Z 2022-07-15T08:00:12Z 2022-07-14 vt_gsexam:35300 http://hdl.handle.net/10919/111256 First described by physician William Dietz in 1995, the "Food Insecurity-Obesity Paradox" (FIOP) attempts to explain the biology and behaviors of people who are simultaneously overweight and food-insecure. I was introduced to this theory as a Behavioral Health graduate student and, in that context, was taught to understand it as a fact. My personal experiences as a Black woman, however, alongside ongoing engagement with Black feminist thought and critical medical sociology, have taught me otherwise. This disssertation takes Dietz's theory as a starting point in order to argue that Black women in the US experience fatphobic and racial discrimination while being "cared for" by western institutional medicine. I argue that discourses like the FIOP, though framed as benevolent clinical theories, do more harm than good: not only do they multiply pathologize so-called "fat" Black women by drawing on disparaging stereotypes, but they simultaneously ignore the specific health and wellness needs that emerge at the intersection of weight, size, skin color, gender, ability, and economic class. My broader dissertation project is an interdisciplinary critique of pathologizing discourses about Black women, including medically "legitimate" ones like the FIOP. Via critical analysis of these discourses, and employing Black feminist and medical sociological perspectives, I explore how stereotypes of Black women correlate with how these women are perceived and treated by physicians and other health professionals. These racialized perceptions and forms of discriminatory medical treatment are instances of what has been labeled, variously, as a racial formation (Omi and Winant, 1997), a matrix of domination (Patricia Hill Collins, 1990) and a racial ideology (Feagin, 2006). These processes are further extended by physicians who use these pathologizing discourses and practices to advance their own careers. Black feminist theorists have described the multiple marginalizations experienced by contemporary Black women in the US and my project places weight and body size within this marginalizing dynamic. After tracing the long history of medical "othering" of Black women by science, I show the persistence of these ideologies in contemporary medical practice. My interviews with Black women investigate their lived experiences of these ideologies and practices, and allow women to speak for themselves in a space that so often speaks for them. Doctor of Philosophy Black women's historical experiences in the US, including my own story, are akin to what Black feminist Melissa Harris-Perry in her book, Sister Citizen: Shame, Stereotypes, and Black Women in America (2011), calls the crooked room. Applying Harris-Perry's theorization of the crooked room to how medical institutions operate to cause Black thick women to be so quickly categorized as diseased, I have developed the concept of the Crooked Room of Medicine (CRoM) to describe the mental, emotional, and physical struggles Black women face at the intersection of race and gender stereotypes and false narratives particularly in medical settings. I utilize and build upon Black feminist theoretical frameworks as well as my own personal narrative to investigate how a society that is built on racialized and gendered systems has implications for how the large Black female body is interpreted as unhealthy and diseased when treated within these social and medical settings. Building on Tressie McMillan Cottom's scholarship, I utilize a methodology of what I call Thick Studies to develop a Gender Race Weight (GRW) matrix from the crooked room of medicine, to map out our experiences and develop a theory that focuses on healing. The result of Black women's disproportionately poor health outcomes is a result of a complex environment of barriers from quality health care, to racism, and stress correlated with the distinct social experiences of Black womanhood in U.S. society (Chinn. Martin, Redmond 2021). The heaviness of generational racialized trauma is still in our DNA (Degruy-Leary 2017). Racism and gender discrimination have profound impacts on the well-being of Black women. I argue for a holistic health treatment that addresses mind, body, emotion, and spirit and for an acknowledgement of Black women's knowledge of health and healing in relation to Black women, weight, and medical space. ETD en Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Black feminisms medical sociology Thick Studies embodiment healing A Black Feminist's Critique of the Crooked Room of Medicine (CRoM): Innovation of Thick Studies and the Gender, Race, Weight (GRW) Matrix Dissertation Doctor of Philosophy doctoral Virginia Polytechnic Institute and State University Sociologyopen.access

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Lumina Foundation 2020-06-16T20:05:37Z 2020-06-16T20:05:37Z 2019 2020-06-02 http://hdl.handle.net/10919/98985 The need for universal post-high school education is rooted in the global shift from an industrial economy to a knowledge economy. The vast majority of jobs being created require education beyond high school, and that trend shows no sign of abating. Unfortunately, fewer than half of Americans ages 25-64 hold a credential beyond high school. Still, there is cause for optimism because many of those who lack credentials do hold some college credit or have skills that should be recognized. This report tracks Puerto Rico' s progress in terms of educational attainment. Lumina Foundation application/pdf en Lumina Foundation Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International http://creativecommons.org/licenses/by-nc-sa/4.0/ state and higher education knowledge economy higher education credentials educational attainment Puerto Rico A Stronger Nation, Learning Beyond High School Builds American Talent: Puerto Rico' s Report 2019 Report Textopen.access

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Skift 2021-03-13T19:18:11Z 2021-03-13T19:18:11Z 2021-03 http://hdl.handle.net/10919/102691 https://skift.com/insight/skift-report-state-corporate-travel-expense-2021/ Corporate Travel has completely shifted due to the onset of the COVID-19 pandemic. However, Skift's recent report surronding Business Travel indicated that the demands of building relationships among businesses in person has increased. Technology will continue to play a massive role in the safety of travel and in-person meetings as the world continues to adjust to living with the treat of COVID-19. application/pdf en Skift In Copyright (InC) http://rightsstatements.org/vocab/InC/1.0/ Business Skift COVID-19 Response The State of Corporate T&E 2021: The Path to Recovery Article Textopen.access

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Hogan, John 2018-01-10T05:00:43Z 2018-01-10T05:00:43Z 2011-12-19 http://hdl.handle.net/10919/81665 https://www.hospitalitynet.org/opinion/4054205.html Sometimes opportunity knocks, but most of the time it sneaks up and then quietly steal away. Doug Larson, nationally syndicated American columnist for the Wisconsin-based newspapers Green Bay Press-Gazette and the Door County Advocate The co-authors of a new book on Social Media shared a somewhat unique perspective in their 12.6.11 blog posted on the Harvard Business School site. The blog title - People Are Not Your Greatest Asset - did not dismiss the value of people in today's corporate culture, but offered a sentiment for leaders that went beyond to examine how we treat the people in our organizations. en Hospitality Net In Copyright http://rightsstatements.org/vocab/InC/1.0/ Hospitality industry Success Team empower invest academic and corporate educator How do you spell SUCCESS? Article Textopen.access

oai:vtechworks.lib.vt.edu:10919/1240502025-02-19T14:14:50Zcom_10919_5com_10919_25799com_10919_24217com_10919_5539col_10919_70873col_10919_24292

Dam, Abhraneil Lee, YeaJi Siddiqui, Arsh Lages, Wallace Santos Jeon, Myounghoon 2025-01-09T19:59:40Z 2025-01-09T19:59:40Z 2024-11 ARTN 103329 (Article number) 1071-5819 https://hdl.handle.net/10919/124050 https://doi.org/10.1016/j.ijhcs.2024.103329 191 Jeon, Myounghoon [0000-0003-2908-671X] 1095-9300 Augmenting visual art in art galleries can be an effective Audio Augmented Reality (AAR) application for indoor exploration. In the current study, eight paintings from four genres were augmented with audio through their sonification. Basic Audio was generated using a sonification algorithm by identifying the major colors of the paintings, and Enhanced Audio was generated by a musician enhancing the Basic Audio; these were presented with the paintings to compare against No Audio. Twenty-six participants viewed each painting in all three conditions; eye gaze metrics, and qualitative data were collected. Results showed that Enhanced Audio led to significantly greater engagement and positive sentiments, compared to Basic Audio. Thematic analysis showed semantic and syntactic relationships of the audio with the paintings, and a tendency to guide users’ gaze over time. Findings from this study can guide future AAR developments to improve auditory display designs to enhance visual experiences. Published version 14 page(s) application/pdf en Academic Press – Elsevier In Copyright http://rightsstatements.org/vocab/InC/1.0/ Augmented reality Sonification Painting Visual art Audio augmented reality using sonification to enhance visual art experiences: Lessons learned International Journal of Human-Computer Studies Article - Refereed Article Journal Text Virginia Tech Virginia Tech/Engineering Virginia Tech/Engineering/Industrial and Systems Engineering Virginia Tech/All T&R Faculty Virginia Tech/Engineering/COE T&R Facultyopen.access

oai:vtechworks.lib.vt.edu:10919/316442024-04-25T00:55:10Zcom_10919_5534col_10919_9291

Cowing, Brandy Ellen Human Nutrition, Foods, and Exercise Davis, Barbara A. Bunce, George Edwin Talmadge, Robert J. 2014-03-14T20:33:13Z 2014-03-14T20:33:13Z 2000-04-04 2000-04-07 2001-04-14 2000-04-14 etd-04072000-08550041 http://hdl.handle.net/10919/31644 http://scholar.lib.vt.edu/theses/available/etd-04072000-08550041/ The growth of many breast cancers is stimulated by the action of the hormone estrogen. Hormonal therapy used to treat these estrogen-dependent breast cancers acts by interfering with the action of estrogen. Current treatments, such as tamoxifen, are not consistently useful due to development of resistance to these drugs. Tamoxifen treatment can also lead to the development of other gynecological cancers, therefore the discovery of novel treatment options for breast cancer is critical. Vitamin B6 is well documented for its role as a modulator of steroid hormones. Pyridoxal phosphate (PLP), the active form of Vitamin B6, may interfere with the action of the estrogen receptor (ER) by blocking the hormone-binding and/or DNA-binding site of the ER. The objective of this study was to examine the effects of Vitamin B6 supplementation on cell proliferation and estrogen-dependent gene expression in breast cancer cells. To accomplish this, estrogen-dependent (MCF-7 and T-47D) and estrogen-independent (BT-20) breast cancer cells were grown in medium supplemented with 0,100, or 300 µM pyridoxal (PL) in the absence or presence of 0.01µM estradiol. Cell counts and [3H]-thymidine incorporation into DNA were assessed in all cell lines. The expression of pS2, an estrogen-sensitive gene, was performed using RNA extracted from MCF-7 cells. PL supplementation was found to significantly decrease total cell numbers and DNA synthesis in both the estrogen-dependent (ER+) and -independent (ER-) breast cancer cells, but did not alter the expression of pS2. These results indicate that PL significantly impairs growth of breast cancer cells and may be exerting its effects via a steroid-independent mechanism. Master of Science Virginia Tech brandyellen1.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ Estrogen Pyridoxal Vitamin B6 Breast Cancer Steroid Hormone Mammary Vitamin B6 Decreases Proliferation and DNA Synthesis in Human Mammary Carcinoma Cell Lines In Vitro Thesis Master of Science masters Virginia Polytechnic Institute and State University Human Nutrition, Foods, and Exerciseopen.access

oai:vtechworks.lib.vt.edu:10919/792342024-04-28T17:24:50Zcom_10919_8195com_10919_25799com_10919_23747com_10919_5539col_10919_78882col_10919_23748

Olabisi, Laura Schmitt Wang, Ryan Qi Ligmann-Zielinska, Arika Civil and Environmental Engineering 2017-09-20T18:21:49Z 2017-09-20T18:21:49Z 2015-10-22 2017-09-20T18:21:49Z Olabisi, L.S.; Wang, R.Q.; Ligmann-Zielinska, A. Why Don’t More Farmers Go Organic? Using A Stakeholder-Informed Exploratory Agent-Based Model to Represent the Dynamics of Farming Practices in the Philippines. Land 2015, 4, 979-1002. http://hdl.handle.net/10919/79234 https://doi.org/10.3390/land4040979 In spite of a growing interest in organic agriculture; there has been relatively little research on why farmers might choose to adopt organic methods, particularly in the developing world. To address this shortcoming, we developed an exploratory agent-based model depicting Philippine smallholder farmer decisions to implement organic techniques in rice paddy systems. Our modeling exercise was novel in its combination of three characteristics: first, agent rules were based on focus group data collected in the system of study. Second, a social network structure was built into the model. Third, we utilized variance-based sensitivity analysis to quantify model outcome variability, identify influential drivers, and suggest ways in which further modeling efforts could be focused and simplified. The model results indicated an upper limit on the number of farmers adopting organic methods. The speed of information spread through the social network; crop yields; and the size of a farmer’s plot were highly influential in determining agents’ adoption rates. The results of this stylized model indicate that rates of organic farming adoption are highly sensitive to the yield drop after switchover to organic techniques, and to the speed of information spread through existing social networks. Further research and model development should focus on these system characteristics. Published version application/pdf en MDPI Creative Commons Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ organic agriculture agent-based modeling sensitivity analysis social networks Philippines Why Don’t More Farmers Go Organic? Using A Stakeholder-Informed Exploratory Agent-Based Model to Represent the Dynamics of Farming Practices in the Philippines Land Article - Refereed Text Philippinesopen.access

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Kline, Vincent Long John Silvers 2012-03-12T15:12:06Z 2012-03-12T15:12:06Z 2007-04 2012-03-12 prevails6C01416 S6L1C1416 http://hdl.handle.net/10919/17055 image/jpeg Digital Library and Archives, University Libraries, Virginia Tech In Copyright http://rightsstatements.org/vocab/InC/1.0/ Card from Long John Silvers - Bluefield West Virginia Card Image Image Bluefield West Virginia United States 24701open.access

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Tan, Roy Patrick Computer Science Edwards, Stephen H. Tegarden, David P. Pérez-Quiñones, Manuel A. Arthur, James D. Ramakrishnan, Naren 2014-03-14T20:15:18Z 2014-03-14T20:15:18Z 2007-08-08 2007-08-16 2007-08-27 2007-08-27 etd-08162007-161911 http://hdl.handle.net/10919/28684 http://scholar.lib.vt.edu/theses/available/etd-08162007-161911/ Software testing is a necessary and integral part of the software quality process. It is estimated that inadequate testing infrastructure cost the US economy between $22.2 and $59.5 billion. We present Sulu, a programming language designed with automated unit testing specifically in mind, as a demonstration of how software testing may be more integrated and automated into the software development process. Sulu's runtime and tools support automated testing from end to end; automating the generation, execution, and evaluation of test suites using both code coverage and mutation analysis. Sulu is also designed to fully integrate automatically generated tests with manually written test suites. Sulu's tools incorporate pluggable test case generators, which enables the software developer to employ different test case generation algorithms. To show the effectiveness of this integrated approach, we designed an experiment to evaluate a family of test suites generated using one test case generation algorithm, which exhaustively enumerates every sequence of method calls within a certain bound. The results show over 80\% code coverage and high mutation coverage for the most comprehensive test suite generated. Ph. D. Virginia Tech sulu.zip thesis.pdf In Copyright http://rightsstatements.org/vocab/InC/1.0/ programming language software engineering Sulu unit testing software testing Programming Language and Tools for Automated Testing Dissertation Ph. D. doctoral Virginia Polytechnic Institute and State University Computer Scienceopen.accessdim////100