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Topic Area: Modeling
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Displaying records 91 to 100 of 131 records.
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91. A Structural Approach to the Temporal Modeling of Networks
Topic: Modeling
Published: 12/14/2009
Authors: Brian Dale Cloteaux, Isabel M Beichl
Abstract: Simulation of many dynamic real world systems such as the Internet and social networks requires developing dynamic models for the underlying networks in these systems. Currently, there is a large body of work devoted towards determining the underlyin ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902636

92. Artificial Intelligence Tools for Failure Event Data Management and Probability Risk Analysis for Failure Prevention
Topic: Modeling
Published: 10/25/2009
Authors: Jeffrey T Fong, Pedro Vincente Marcal
Abstract: Over the last thirty years, much research has been done on the development of failure event databases and fatigue modeling of crack growth in pressure vessels and piping. According to a USNRC report (NUREG/CR6674, 2000), results of a fatigue crack g ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903592

93. Measuring the Utility/Path Diversity Tradeoff in Multipath Protocols
Topic: Modeling
Published: 10/20/2009
Authors: Fern Y Hunt, Vladimir V Marbukh
Abstract: We derive a model of congestion control where the trade-off between utility and path diversity can be investigated. In a network where there can be multiple routes between locations, each source is assigned a route according to a random allocation s ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=904662

94. Fast Iterative Solver for Convection-Diffusion Systems with Spectral Elements
Topic: Modeling
Published: 10/16/2009
Authors: Aaron Lott, Howard Elman
Abstract: We introduce a solver and preconditioning technique based on Domain Decomposition and the Fast Diagonalization Method that can be applied to tensor product based discretizations of the steady convection-diffusion equation. The method is based on iter ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901466

95. Spectrum Simulation in DTSA-II
Report Number: 832430
Topic: Modeling
Published: 10/1/2009
Author: Nicholas W m Ritchie
Abstract: Spectrum simulation is a useful practical and pedagogical tool. Particularly with complex samples or trace constituents, a simulation can help to understand the limits of the technique and how to optimize the tools for the optimal measurement. DTSA- ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=832430

96. Gauging the Repeatability of 3D Imaging Systems by Sphere Fitting
Topic: Modeling
Published: 9/30/2009
Authors: Marek Franaszek, Geraldine S Cheok, Kamel Shawki Saidi
Abstract: Multiple scans of the same object acquired with 3D imaging system (e.g., laser scanner) in the same experimental conditions could provide valuable information about the instrument s performance (e.g., stability, existence of bias, measurement error). ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=903444

97. Parallelizing a Micromagnetic Program for Use on Multi-processor Shared Memory Computers
Topic: Modeling
Published: 9/22/2009
Author: Michael J Donahue
Abstract: Parallelization of a finite difference micromagnetic program on shared memory computer systems is studied. Efficiency is found to be limited by memory bandwidth, and techniques are introduced to reduce memory traffic. Computations are sped up by a fa ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902207

98. A Combinatorial Approach to Building Navigation Graphs for Dynamic Web Applications
Topic: Modeling
Published: 9/20/2009
Authors: Raghu N Kacker, David R Kuhn, James F Lawrence, Wenhua Wang, Yu Lei, Sreedevi Sampath
Abstract: Modeling the navigation structure of a dynamic web application is a challenging task because of the presence of dynamic pages. In particular, there are two problems to be dealt with: (1) the page explosion problem, i.e., the number of dynamic pages m ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902865

99. Estimating Volumes of Simulated Lung Cancer Nodules
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7571
Topic: Modeling
Published: 7/15/2009
Authors: David E. Gilsinn, Bruce R. Borchardt, Amelia Tebbe
Abstract: Lung cancer is a disease of uncontrolled cell growth in tissues of the lung. Computed tomography (CT) shows promise in detecting lung cancers at earlier, more operable stages, when survival is better. CT scans generate multiple 2-D slice images of th ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901958

100. Design of the DEMO Fusion Reactor Following ITER
Series: Journal of Research (NIST JRES)
Topic: Modeling
Published: 7/1/2009
Authors: Geoffrey B McFadden, Paul R. Garabedian
Abstract: Runs of the NSTAB equilibrium and stability code show there are many 3D solutions of the advanced tokamak problem subject to axially symmetric boundary conditions. These numerical simulations based on mathematical equations in conservation form predi ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902386



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