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Displaying records 131 to 140 of 231 records.
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131. Lattice Symmetry and Identification--The Fundamental Role of Reduced Cells in Materials Characterization
Series: Journal of Research (NIST JRES)
Topic: Math
Published: 2/1/2002
Author: Alan D. Mighell
Abstract: In theory, physical crystals can be represented by idealized mathematical lattices. Under appropriate conditions, these representations can be used for a variety of purposes such as identifying, classifying, and understanding the physical properties ...

132. Light a Single Candle: Studying Supernovae
Topic: Math
Published: 3/1/2012
Authors: Dianne M O'Leary, Bert W Rust
Abstract: At peak luminosity, Type Ia supernovae can be even brighter than their parent galaxies, and their light curves display a very uniform and regular behavior. This makes them excellent candidates for a role as standard candles in measuring the distance ...

133. Linear Algebra and Sequential Importance Ssampling for Network Reliability
Topic: Math
Published: 12/11/2011
Authors: David G. Harris, Francis Sullivan, Isabel M Beichl
Abstract: The reliability polynomial of a graph gives the probability that a graph is connected as a function of the probability that each edge is connected. The coefficients of the reliability polynomial count the number of connected subgraphs of various size ...

134. Linear Stability of Cylindrical Couette Flow Using a Convection Regime Base Flow
Topic: Math
Published: 5/3/2005
Authors: M E Ali, Geoffrey B McFadden
Abstract: Instability of steady circular Couette flow with radial heating across a vertically oriented annulus with inner cylinder rotating and outer cylinder stationary is investigated using linear stability analysis. The convection regime base flow is devel ...

135. Local Bounds on Effective Hamiltonians for Stabilizer Codes
Topic: Math
Published: 1/22/2009
Authors: Stephen Bullock, Dianne M O'Leary
Abstract: This paper introduces various notion of k-locality of stabilizer codes inherited from the associated stabilizer groups. A choice of generators for the group leads to a Hamiltonian with the code in its groundspace, while a Hamiltonian holding the code ...

136. Logarithmic Convexity and the 'Slow Evolution' Constraint in Ill-Posed Initial Value Problems
Topic: Math
Published: 1/15/1999
Author: Alfred S Carasso
Abstract: This paper examines a wide class of ill-posed initial value problems for partial differential equations, and surveys logarithmic convexity results leading to Hoelder-continuous dependence on data for solutions satisfying prescribed bounds. The discus ...

137. 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 ...

138. MGGHAT User's Guide Version 1.1
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 5948
Topic: Math
Published: 1/1/1997
Author: William F Mitchell

139. Mathematical Optimization of Procedures for Cryoprotectant Equilibration Using a Toxicity Cost Function
Topic: Math
Published: 1/10/2012
Authors: Adam Zachary Higgins, James Benson, Anthony J Kearsley
Abstract: Cryopreservation nearly universally depends on the equilibration of cells and tissues with high concentrations of permeating chemicals known as cryoprotective agents, or CPAs. Despite their protective properties, CPAs can cause damage as a result of ...

140. Mathematical and Computational Sciences Division Summary of Activities for Fiscal Year 2009
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7671
Topic: Math
Published: 2/25/2010
Author: Ronald F Boisvert
Abstract: This report summarizes the technical work of the Mathematical and Computational Sciences Division (MCSD) of NIST s Information Technology Laboratory. Part I (Overview) provides a high-level overview of the Division s activities, including highlight ...

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