Now showing items 21-40 of 3128

    • A diffusion-viscous analysis and experimental verification of defect formation in sintered silver bond-line 

      Xiao, K.; Ngo, K. D. T.; Lu, G. Q. (Cambridge University Press, 2014-04-01)
      The low-temperature joining technique (LTJT) by silver sintering is being implemented by major manufacturers of power electronic devices and modules for bonding power semiconductor chips. A common die-attach material used ...
    • A Framework for Occupancy Tracking in a Building via Structural Dynamics Sensing of Footstep Vibrations 

      Poston, Jeffrey D.; Buehrer, R. Michael; Tarazaga, Pablo A. (Frontiers, 2017-11-06)
      Counting the number of occupants in building areas over time—occupancy tracking— provides valuable information for responding to emergencies, optimizing thermal conditions or managing personnel. This capability is distinct ...
    • A human exposome framework for guiding risk management and holistic assessment of recycled water quality 

      Garner, Emily; Zhu, Ni; Strom, Laurel; Edwards, Marc A.; Pruden, Amy (Royal Society of Chemistry, 2016-04-12)
      Challenges associated with water scarcity and increasing water demand are leading many cities around the globe to consider water reuse as a step towards water sustainability. Recycled water may be used in a spectrum of ...
    • A Modest Proposal for Open Market Risk Assessment to Solve the Cyber-Security Problem 

      O’Shea, Timothy J.; Mondl, Adam; Clancy, T. Charles (Virginia Tech, 2016-04-29)
      We introduce a model for a market based economic system of cyber-risk valuation to correct fundamental problems of incentives within the information technology and information processing industries. We assess the makeup ...
    • A Simulation Optimization Approach to Epidemic Forecasting 

      Nsoesie, Elaine O.; Beckman, Richard J.; Shashaani, Sara; Nagaraj, Kalyani S.; Marathe, Madhav V. (PLOS, 2013-06-27)
      Reliable forecasts of influenza can aid in the control of both seasonal and pandemic outbreaks. We introduce a simulation optimization (SIMOP) approach for forecasting the influenza epidemic curve. This study represents ...
    • A systematic review of studies on forecasting the dynamics of influenza outbreaks 

      Nsoesie, Elaine O.; Brownstein, John S.; Ramakrishnan, Naren; Marathe, Madhav V. (Wiley, 2013-12-23)
      Forecasting the dynamics of influenza outbreaks could be useful for decision-making regarding the allocation of public health resources. Reliable forecasts could also aid in the selection and implementation of interventions ...
    • Ablation outcome of irreversible electroporation on potato monitored by impedance spectrum under multi-electrode system 

      Zhao, Yajun; Liu, Hongmei; Bhonsle, Suyashree P.; Wang, Yilin; Davalos, Rafael V.; Yao, Chenguo (2018-09-20)
      Background Irreversible electroporation (IRE) therapy relies on pulsed electric fields to non-thermally ablate cancerous tissue. Methods for evaluating IRE ablation in situ are critical to assessing treatment ...
    • The Abridgment and Relaxation Time for a Linear Multi-Scale Model Based on Multiple Site Phosphorylation 

      Wang, Shuo; Cao, Yang (PLOS, 2015-08-11)
      Random effect in cellular systems is an important topic in systems biology and often simulated with Gillespie’s stochastic simulation algorithm (SSA). Abridgment refers to model reduction that approximates a group of ...
    • Abstraction Mechanisms in Support of Top-Down and Bottom-Up Task Specification 

      Raghu, K. S.; Arthur, James D. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1988), TR-88-15
      Abstraction is a powerful mechanism for describing objects and relationships from multiple, yet consistent, perspectives. When properly applied to interface design, abstraction mechanisms can provide the interaction ...
    • The Abstraction Refinement Model and the Modification-Cost Problem 

      Keller, Benjamin J.; Nance, Richard E. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1992), TR-92-29
      A problem common to systems and software engineering is that of estimating the cost of making changes to a system. For system modifications that include changes to the design history of the system this is the "modification-cost" ...
    • The Academy: A Community of Information Retrieval Agents 

      France, Robert K. (1994-09-06)
      We commonly picture text as a sequence of words; or alternatively as a sequence of paragraphs, each of which is composed of a sequence of sentences, each of which is itself a sequence of words. It is also worth noting that ...
    • Accelerating Data-Serial Applications on Data-Parallel GPGPUs: A Systems Approach 

      Aji, Ashwin M.; Feng, Wu-chun (Department of Computer Science, Virginia Polytechnic Institute & State University, 2008), TR-08-24
      The general-purpose graphics processing unit (GPGPU) continues to make significant strides in high-end computing by delivering unprecedented performance at a commodity price. However, the many-core architecture of the GPGPU ...
    • Accelerating Electrostatic Surface Potential Calculation with Multiscale Approximation on Graphics Processing Units 

      Anandakrishnan, Ramu; Scogland, Thomas R. W.; Fenley, Andrew T.; Gordon, John; Feng, Wu-chun; Onufriev, Alexey V. (Department of Computer Science, Virginia Polytechnic Institute & State University, 2009), TR-09-15
      Tools that compute and visualize biomolecular electrostatic surface potential have been used extensively for studying biomolecular function. However, determining the surface potential for large biomolecules on a typical ...
    • Accelerating Workloads on FPGAs via OpenCL: A Case Study with OpenDwarfs 

      Verma, Anshuman; Helal, Ahmed E.; Krommydas, Konstantinos; Feng, Wu-chun (Department of Computer Science, Virginia Polytechnic Institute & State University, 2016-05-13), TR-16-04
      For decades, the streaming architecture of FPGAs has delivered accelerated performance across many application domains, such as option pricing solvers in finance, computational fluid dynamics in oil and gas, and packet ...
    • Acceptance Procedures for New and Quality Control Procedures for Existing Types of Corrosion-Resistant Reinforcing Steel 

      Stephen R. Sharp; Larry J. Lundy; Harikrishnan Nair; Moen, Cristopher Dennis; Josiah B. Johnson; Sarver, Brian E. (Virginia Center for Transportation Innovation and Research, 2011-06-01)
      As the Virginia Department of Transportation (VDOT) continues to move forward with implementing the use of corrosion-resistant reinforcing (CRR) bars, it is important for VDOT to have a means of characterizing the candidate ...
    • Access Control Design on Highway Interchanges 

      Hesham Rakha; Alejandra Medina Flintsch; Mazen Arafeh; Abdel-Salam Gomaa Abdel-Salam; Dhruv Dua; Abbas, Montasir (Virginia Center for Transportation Innovation and Research, 2008-01-01)
      The adequate spacing and design of access to crossroads in the vicinity of freeway ramps are critical to the safety and traffic operations of both the freeway and the crossroad. The research presented in this report develops ...
    • Accounts from a Claims Reuse Experience: Design of an Airline Fares Tracker 

      Montabert, Cyril; Tarpley III, Anderson Ray (Department of Computer Science, Virginia Polytechnic Institute & State University, 2007-12-01), TR-07-18
      Previous research efforts have led to the establishment of a repository of claims as reusable knowledge entities. Through the analysis, design, and prototyping of a notification system aimed at monitoring airfares across ...
    • Achieving Asynchronous Speedup While Preserving Synchronous Semantics: An Implementation of Instructional Footprinting in Linda 

      Landry, Kenneth D.; Arthur, James D. (Department of Computer Science, Virginia Polytechnic Institute & State University, 1993), TR-93-33
      Linda is a coordination language designed to support process creation and inter-process communication within conventional computational languages. Although the Linda paradigm touts architectural and language independence, ...
    • Achieving Very High Order for Implicit Explicit Time Stepping: Extrapolation Methods 

      Constantinescu, Emil M.; Sandu, Adrian (Department of Computer Science, Virginia Polytechnic Institute & State University, 2008-07-01), TR-08-13
      In this paper we construct extrapolated implicit-explicit time stepping methods that allow to efficiently solve problems with both stiff and non-stiff components. The proposed methods can provide very high order discretizations ...
    • Acoustic Effects Accurately Predict an Extreme Case of Biological Morphology 

      Zhang, Z. W.; Truong, S. N.; Müller, Rolf (American Physical Society, 2009-07-17)
      The biosonar system of bats utilizes physical baffle shapes around the sites of ultrasound emission for diffraction-based beam forming. Among these shapes, some extreme cases have evolved that include a long noseleaf ...