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Displaying records 51 to 60 of 103 records.
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51. Fast Iterative Solver for Convection-Diffusion Systems with Spectral Elements
Topic: Math
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 ...

52. A Combinatorial Approach to Building Navigation Graphs for Dynamic Web Applications
Topic: Math
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 ...

53. Modeling Microstructures with OOF2
Topic: Math
Published: 9/1/2009
Authors: Andrew Charles edmu Reid, Rhonald Lua, R E Garcia, Valerie R. Coffman, Stephen A Langer
Abstract: OOF2 is a program for computing the properties and behavior of material microstructures, beginning with an image of the microstructural geometry. OOF2 uses finite elements, but is designed to be used by materials scientists with little or no finite e ...

54. Design of the DEMO Fusion Reactor Following ITER
Series: Journal of Research (NIST JRES)
Topic: Math
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 ...

55. Atmospheric Retention of Man-made CO^d2^ Emissions
Topic: Math
Published: 6/8/2009
Author: Bert W Rust
Abstract: Rust and Thijsse have shown that global annual average temperature anomalies T(t^di^) vary linearly with atmospheric CO^d2^ concentrations c(t^di^). The c(t^di^) can be related to man-made CO^d2^ emissions F(t^di^) by a linear regression model whose ...

56. An Interaction-based Test Sequence Generation Approach for Testing Web Applications
Topic: Math
Published: 12/3/2008
Authors: Wenhua Wang, Sreedevi Sampath, Yu Lei, Raghu N Kacker
Abstract: Web applications often use dynamic pages that interact with each other by accessing shared objects, e.g., session objects. Interactions between dynamic pages need to be carefully tested, as they may give rise to subtle faults that cannot be detected ...

57. Classical and Bayesian Interpretation of the Birge Test of Consistency and Its Generalized Version in Interlaboratory Evaluations
Topic: Math
Published: 4/10/2008
Authors: Raghu N Kacker, Alistair Forbes, Ruediger Kessel, K D Sommer
Abstract: The results from an interlaboratory evaluation are said to be consistent if their dispersion is not more than what can reasonably be attributed to their stated variances. A well known test of consistency in interlaboratory evaluations is the Birge te ...

58. IPOG/IPOG-D: Efficient Test Generation for Multi-way Combinatorial Testing
Topic: Math
Published: 11/29/2007
Authors: Yu Lei, Raghu N Kacker, David R Kuhn, Vadim Okun, James F Lawrence
Abstract: We present two strategies for multi-way testing (i.e., t-way testing with t > 2). The first strategy generalizes an existing strategy, called In-Parameter-Order, from pairwise testing to multi-way testing. This strategy requires all t-way combination ...

59. Evolution of Modern Approaches to Express Uncertainty in Measurement
Topic: Math
Published: 11/27/2007
Authors: Raghu N Kacker, K D Sommer, Bernd Siebert
Abstract: The object of this paper is to discuss evolution of the concept of uncertainty in measurement and methods for its quantification from the classical error analysis to the modern approaches based on the Guide to the Expression of Uncertainty in Measure ...

60. Modeling of Photochemical Reactions in a Focused Laser Beam
Series: Journal of Research (NIST JRES)
Topic: Math
Published: 7/1/2007
Authors: Fern Y Hunt, Adolfas Kastytis Gaigalas, Lili Wang
Abstract: This paper presents a mathematical model of photodegradation of fluorophores passing through a laser beam. The beam is focused on the sample and thus the power distribution of incident light is strongly dependent on spatial location while the fluorop ...

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