Now showing items 2686-2705 of 3583

    • Quality Assurance Testing of a High Performance Steel Bridge in Virginia 

      Duke, John C., Jr.; Reynolds, William T. (Virginia Center for Transportation Innovation and Research, 2005-04-01)
      One of the original objectives of this study was to recommend appropriate procedures for welding bridge members of high performance steel HPS70W to assure quality welds. The final objective was to determine whether ...
    • Quantifying Human Mobility Perturbation and Resilience in Hurricane Sandy 

      Wang, Qi; Taylor, John E. (Public Library of Science, 2014-11-19)
      Human mobility is influenced by environmental change and natural disasters. Researchers have used trip distance distribution, radius of gyration of movements, and individuals' visited locations to understand and capture ...
    • Quantifying mammalian genomic DNA hydroxymethylcytosine content using solid-state nanopores 

      Zahid, Osama K.; Zhao, Boxuan Simen; He, Chuan; Hall, Adam R. (Springer Nature, 2016-07-07)
      5-hydroxymethylcytosine (5 hmC), the oxidized form of 5-methylcytosine (5 mC), is a base modification with emerging importance in biology and disease. However, like most epigenetic elements, it is transparent to many ...
    • Quantifying the major mechanisms of recent gene duplications in the human and mouse genomes: a novel strategy to estimate gene duplication rates 

      Pan, Deng; Zhang, Liqing (2007-08-02)
      Background The rate of gene duplication is an important parameter in the study of evolution, but the influence of gene conversion and technical problems have confounded previous attempts to provide a satisfying estimate. ...
    • Quantitative analysis of fiber texture in cubic films 

      Rao, Satish I.; Houska, Charles R. (American Institute of Physics, 1983)
      The method of Roe and Krigbaum for determining fiber texture has been extended to thin film applications. It is often desirable to make i n s i t u pole density measurements of a film on a thick substrate. This does not ...
    • Quantitative Assessment of the Software Maintenance Process 

      Henry, Joel; Henry, Sallie M.; Kafura, Dennis G.; Matheson, Lance A. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1993), TR-93-04
      This paper describes analysis techniques used to assess quantitatively the software maintenance process of a large military contractor, and the results obtained. The analysis techniques make use of basic data collected ...
    • Quantitative phase spectroscopy. 

      Rinehart, M; Zhu, Y; Wax, A (2012-05-01)
      Quantitative phase spectroscopy is presented as a novel method of measuring the wavelength-dependent refractive index of microscopic volumes. Light from a broadband source is filtered to an ~5 nm bandwidth and rapidly tuned ...
    • Quantitative prediction of the effect of genetic variation using hidden Markov models 

      Liu, Mingming; Watson, Layne T.; Zhang, Liqing (2014-01-09)
      Background With the development of sequencing technologies, more and more sequence variants are available for investigation. Different classes of variants in the human genome have been identified, including single nucleotide ...
    • Quantitative Relative Comparison of CFD Simulation Uncertainties for a Transonic Diffuser Problem 

      Hosder, Serhat; Grossman, Bernard; Haftka, Raphael T.; Mason, William H.; Watson, Layne T. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2004), TR-04-20
      Different sources of uncertainty in CFD simulations are illustrated by a detailed study of two-dimensional, turbulent, transonic flow in a converging-diverging channel. Runs were performed with the commercial CFD code GASP ...
    • Quantitative Spatio-Temporal Characterization of Scour at the Base of a Cylinder 

      Bouratsis, Pol; Diplas, Panayiotis; Dancey, Clinton L.; Apsilidis, Nikolaos (MDPI, 2017-03-20)
      The measurement of the morphologic characteristics of evolving sediment beds around hydraulic structures is crucial for the understanding of the physical processes that drive scour. Although there has been significant ...
    • Quantum Computing Applied to Optimization 

      Yuzhen, Ge; Watson, Layne T. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1999-09-01), TR-99-03
      Optimization problems represent a class of problems that can be time consuming to solve and very complex. In this paper, a quantum algorithm for solving optimization problems is proposed. The algorithm utilizes the encoding ...
    • A quasi(unidirectional) Tellegen gyrator 

      Zhai, Junyi; Li, Jiefang; Dong, Shuxiang; Viehland, Dwight D.; Bichurin, Mirza I. (American Institute of Physics, 2006-12-15)
      We show that magnetoelectric (ME) laminate composites have characteristics of a previously conjectured, but unfound, fifth network circuit element-the Tellegen gyrator. Our findings establish that ME laminate composites ...
    • Quasi-Brittle Fracture Modeling of Preflawed Bitumen Using a Diffuse Interface Model 

      Hou, Yue; Sun, Fengyan; Sun, Wenjuan; Guo, Meng; Xing, Chao; Wu, Jiangfeng (Hindawi, 2016-06-09)
      Fundamental understandings on the bitumen fracture mechanism are vital to improve the mixture design of asphalt concrete. In this paper, a diffuse interface model, namely, phase-field method is used for modeling the ...
    • Quasi-zero lattice mismatch and band alignment of BaTiO3 on epitaxial (110)Ge 

      Hudait, Mantu K.; Zhu, Yizheng; Jain, Nikhil; Maurya, Deepam; Zhou, Y.; Priya, Shashank (American Institute of Physics, 2013-07-14)
      Growth, structural, and band alignment properties of pulsed laser deposited amorphous BaTiO3 on epitaxial molecular beam epitaxy grown (110) Ge layer, as well as their utilization in low power transistor are reported. ...
    • Query Composition: Why Does It Have to Be So Hard? 

      Nowell, Lucy Terry; Hix, Deborah; Labow, Eric D. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1993), TR-93-19
      Project Envision, a large research effort at Virginia Tech, focuses on developing a user centered multimedia database from the computer science literature with full-text searching and full-content retrieval capabilities. ...
    • A Query Language for Information Graphs 

      Betrabet, Sangita C.; Fox, Edward A.; Chen, Qi-Fan (Department of Computer Science, Virginia Polytechnic Institute & State University, 1993), TR-93-03
      In this paper we propose a database model and query language for information retrieval systems. The information graph model and Graph Object Access Language (GOAL) allow integrated handling of data, information and knowledge ...
    • Query Processing Strategies for Distributed Database Systems 

      Egyhazy, Csaba J. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1983), CS83016-R
      No abstract available.
    • Queue Layouts and Staircase Covers of Matrices 

      Abrams, Marc; Batongbacal, Alan; Ribler, Randy; Vazirani, Devendra; Heath, Lenwood S.; Pemmaraju, Sriram V. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1994-06-01), TR-94-22
      A connection between a queue layout of an undirected graph and a staircase cover of its adjacency matrix is established. The connection is exploited to establish a number of combinatorial results relating the number of ...
    • A Queueing Network Analysis of Dynamic Recon-figurability in a Hierarchical Information Network 

      Nance, Richard E.; Bhat, U. Narayan (Department of Computer Science, Virginia Polytechnic Institute & State University, 1992), TR-92-62
      Using a queueing network model of a hierarchical information network, we compare the effect of limited dynamic reconfiguration on expected transmission delays. Two distinctive features characterize the queueing network ...
    • 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 ...