Now showing items 2916-2935 of 3843

    • R 

      Fouh, Eric; Poirel, Christopher (2010-11-25)
      This module covers use of the R language for performing the statistical analysis needed for several information retrieval (IR) techniques. The R language is extremely extensive and a powerful tool. R will not be covered ...
    • Race, Rigor, and Selectivity in US Engineering: The History of an Occupational Color Line 

      Borrego, Maura Jenkins (Johns Hopkins Univ Press, 2011)
    • Radiation Mapping in Post-Disaster Environments Using an Autonomous Helicopter 

      Towler, Jerry; Krawiec, Bryan; Kochersberger, Kevin (MDPI, 2012-07-05)
      Recent events have highlighted the need for unmanned remote sensing in dangerous areas, particularly where structures have collapsed or explosions have occurred, to limit hazards to first responders and increase their ...
    • Radiation Search Operations using Scene Understanding with Autonomous UAV and UGV 

      Christie, Gordon; Shoemaker, Adam; Kochersberger, Kevin; Tokekar, Pratap; McLean, Lance; Leonessa, Alexander (Virginia Tech, 2016-08-31)
      Autonomously searching for hazardous radiation sources requires the ability of the aerial and ground systems to understand the scene they are scouting. In this paper, we present systems, algorithms, and experiments to ...
    • Rail Surface Measurement And Multi-Scale Modeling Of Wheel-Rail Contact 

      Alemi, MM; Taheri, S (Amer Soc Mechanical Engineers, 2016-01-01)
    • Raman and electron microscopy analysis of carbon nanotubes exposed to high power laser irradiance 

      Ramadurai, Krishna; Cromer, Christopher L.; Dillon, Anne C.; Mahajan, Roop L.; Lehman, John H. (American Institute of Physics, 2009-05-01)
      High power laser radiometry requires efficient and damage-resistant detectors. The current study explores the evolving nature of carbon nanotube coatings for such detectors upon their exposure to incrementally increasing ...
    • Raman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 single crystals as a function of temperature and composition 

      Luo, Liang; Ge, Wenwei; Li, Jiefang; Viehland, Dwight D.; Farley, Charles; Bodnar, Robert J.; Zhang, Qinhui; Luo, Haosu (American Institute of Physics, 2011-06-01)
      A Raman spectroscopic study of Na1/2Bi1/2TiO3-x%BaTiO3 (NBT-x%BT) single crystals with x=0 and 5.6 has been performed as a function of temperature from 25 to 600 degrees C. The general features of the Raman spectra for the ...
    • The Rametrix (TM) PRO Toolbox v1.0 for MATLAB (R) 

      Senger, Ryan S.; Robertson, John L. (2020-01-06)
      Background. Existing tools for chemometric analysis of vibrational spectroscopy data have enabled characterization of materials and biologicals by their broad molecular composition. The Rametrix (TM) LITE Toolbox v1.0 for ...
    • Random vibration of laminated plates modeled within a high-order shear deformation theory 

      Cederbaum, Gabriel; Librescu, Liviu; Elishakoff, Isaac (Acoustical Society of America, 1988-09-01)
      This article deals with the dynamic response of simply supported, symmetric cross-ply laminates to stationary random load. The theory of laminated plates used here takes into account transverse shear flexibility, transverse ...
    • Ranges of Injury Risk Associated with Impact from Unmanned Aircraft Systems 

      Campolettano, Eamon T.; Bland, Megan L.; Gellner, Ryan A.; Sproule, David W.; Rowson, Bethany; Tyson, Abigail M.; Duma, Stefan M.; Rowson, Steven (2017-12)
      Regulations have allowed for increased unmanned aircraft systems (UAS) operations over the last decade, yet operations over people are still not permitted. The objective of this study was to estimate the range of injury ...
    • Rapid Modeling, Prototyping, and Generation of Digital Libraries- a Theory-Based Approach 

      Goncalves, Marcos A.; Zhu, Qinwei; Kelapure, Rohit; Fox, Edward A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2003), TR-03-16
      Despite some development in the area of DL architectures and systems, there is still little support for the complete life cycle of DL development, including requirements gathering, conceptual modeling, rapid prototyping, ...
    • Rapid Prototyping in Human-Computer Interface Development 

      Hartson, H. Rex; Smith, Eric C. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1989), TR-89-03
      Some conventional approaches to interactive system development tend to force commitment to design detail without a means for visualizing the result until it is too late to make significant changes. Rapid prototyping and ...
    • Rapid Prototyping in Human-Computer Interface Development 

      Hartson, H. Rex; Smith, Eric C. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1989), TR-89-42
      Some conventional approaches to interactive system development tend to force commitment to design detail without a means for visualizing the result until it is too late to make significant changes. Rapid prototyping and ...
    • Rapid Replacement of Tangier Island Bridges Including Lightweight and Durable Fiber-Reinforced Polymer Deck Systems 

      Cousins, Thomas E.; Lesko, John J.; Majumdar, P.K.; Liu, Z. (Virginia Center for Transportation Innovation and Research, 2009-09-01)
      Fiber-reinforced polymer (FRP) composite cellular deck systems were used as new bridge decks on two replacement bridges on Tangier Island, Virginia. The most important characteristics of this application were reduced ...
    • Rapid Screening of Transformed Data Leaks with Efficient Algorithms and Parallel Computing 

      Shu, Xiaokui; Zhang, Jing; Yao, Danfeng (Daphne); Feng, Wu-Chun (ACM, 2015-03)
      The leak of sensitive data on computer systems poses a serious threat to organizational security. Organizations need to identify the exposure of sensitive data by screening the content in storage and transmission, i.e., ...
    • Rapid Stereomicroscopic Imaging of HER2 Overexpression in Ex Vivo Breast Tissue Using Topically Applied Silica-Based Gold Nanoshells 

      Bickford, Lissett R.; Langsner, Robert J.; Chang, Joseph; Kennedy, Laura C.; Agollah, Germaine D.; Drezek, Rebekah (Hindawi, 2012-10-22)
      Tumor margin detection for patients undergoing breast conservation surgery primarily occurs postoperatively. Previously, we demonstrated that gold nanoshells rapidly enhance contrast of HER2 overexpression in ex vivo tissue ...
    • RapidRadio: A Domain-Specific Productivity Enhancing Framework 

      Surís, Jorge A.; Recio, Adolfo; Athanas, Peter (Hindawi, 2011-02-14)
      The RapidRadio framework for signalclassification and receiver deployment is discussed. The frameworkis a productivity enhancing tool that reduces the requiredknowledge-base for implementing a receiver on an FPGA-basedSDR ...
    • Ratio of dynamic moduli and estimation of relaxation times 

      Huang, J. H.; Baird, Donald G. (AIP Publishing, 2002-07-01)
      In this paper, the theoretical interrelation between the ratio of dynamic moduli and the number and distribution of relaxation times required to fit the generalized Maxwell model to the data was investigated. Theorems were ...
    • RAxML-Cell: Parallel Phylogenetic Tree Inference on the Cell Broadband Engine 

      Blagojevic, Filip; Stamatakis, Alexandros; Antonopoulos, Christos; Nikolopoulos, Dimitrios (Department of Computer Science, Virginia Polytechnic Institute & State University, 2006), TR-06-23
      Phylogenetic tree reconstruction is one of the grand challenge problems in Bioinformatics. The search for a best-scoring tree with 50 organisms, under a reasonable optimality criterion, creates a topological search space ...
    • Rayleigh Processes in Single-Phase Fluids 

      Cramer, Mark S. (AIP Publishing, 2006-01-01)
      In the present study we examine Rayleigh flows of single-phase, nonreacting fluids. When the fluid is of the Bethe-Zel'dovich-Thompson type, it is shown that as many as three sonic points and extrema of the entropy, enthalpy, ...