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Topic Area: Math

Displaying records 91 to 100 of 220 records.
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91. Modeling Microstructures with OOF2
Topic: Math
Published: 9/1/2009
Authors: Andrew C.E. Reid, Rhonald Lua, R E Garcia, Valerie R. Coffman, Stephen 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 ...

92. Where the Rubber Meets the Road
Topic: Math
Published: 9/1/2009
Author: Isabel M Beichl
Abstract: This is an editorial on the importance of scientific computing.

93. Estimating Volumes of Simulated Lung Cancer Nodules
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7571
Topic: Math
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 ...

94. Lower Bounds for Accessing Information on Pure Pointer Machines
Topic: Math
Published: 7/13/2009
Authors: Brian Dale Cloteaux, Desh Ranjan
Abstract: We study the complexity of representing an array on a Pure Pointer Machine (PPM) or a pointer machine without arithmetic capabilities. In particular, we show that lower bounds in access time for information retrieval on a PPM arise from two different ...

95. 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 ...

96. The contribution of lipid layer movement to tear film thinning and breakup
Topic: Math
Published: 6/15/2009
Authors: Geoffrey B McFadden, P. Ewan King-Smith, Barbara A. Fink, Jason J. Nichols, Richard J Braun
Abstract: The purpose of this study is to investigate the origin of the tear film thinning between blinks, which can lead to tear film breakup and ocular surface damage. Two mechanisms of thinning are considered: "tangential flow" of the tear film along the su ...

97. 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 ...

98. Rectangular Distribution Whose Width is Not Exactly Known: Isocurvilinear Trapezoidal Distribution
Topic: Math
Published: 6/1/2009
Authors: Raghu N Kacker, James F Lawrence
Abstract: After the Gaussian distribution, the probability distribution most commonly used in evaluating uncertainty in measurement is the rectangular distribution. When the mid-point of a rectangular distribution is fixed but the half-width is uncertain and ...

99. Tensor Product Grid Generation for Complex Surface Visualizations in a Digital Library of Mathematical Functions
Topic: Math
Published: 5/25/2009
Authors: Bonita V Saunders, Qiming Wang
Abstract: We have used tensor product B-spline grids to develop accurate plots that wnhance the understanding of high level mathematical functions described in the National Institute of Standards and Technology (NIST) Digital Library of Mathematical Functions. ...

100. Quadratic Fermionic Interactions Yield Hamiltonians with Large Ground-state Energy Gaps
Topic: Math
Published: 3/24/2009
Authors: Dianne M O'Leary, Michael J. O'Hara
Abstract: Polynomially-large ground-state energy gaps are rare in many-body quantum systems, but required for adiabatic quantum computing. We show analytically that the gap is generically polynomially-large for quadratic fermionic Hamiltonians, first conside ...

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