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Displaying records 61 to 70 of 183 records.
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61. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51268

62. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=902386

63. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890002

64. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=890014

65. Fast Iterative Solver for Convection-Diffusion Systems with Spectral Elements
Series: NIST Interagency/Internal Report (NISTIR)
Report Number: 7574
Topic: Math
Published: 3/5/2009
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=902034

66. We'll Take Care of All Your Problems
Topic: Math
Published: 3/1/2009
Author: Isabel M Beichl
Abstract: No abstract
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=901368

67. Extending Measurement Science to Interactive Visualization Environments
Topic: Math
Published: 1/30/2009
Authors: Judith Ellen Terrill, William L George, Terence J. Griffin, John G Hagedorn, John T. Kelso, Thomas M Olano, Adele P Peskin, Steven G Satterfield, James S Sims, Jeffrey W Bullard, Joy P Dunkers, Nicos Martys, Agnes (Abbie) O'Gallagher, Gillian Haemer
Abstract: We describe a method for creating a visual laboratory to interactively measure and analyze scientific data. We move the normal activities that scientists perform to understand their data into the visualization environment. The visualization environme ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51227

68. 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 ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51274

69. Bifurcations, Center Manifolds, and Periodic Solutions
Topic: Math
Published: 1/15/2009
Author: David E. Gilsinn
Abstract: Nonlinear time delay differential equations are well known to have arisen in models in physiology, biology, and population dynamics. They have also arisen in models of metal cutting processes. Machine tool chatter, from a process called regenerative ...
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=51255

70. Begin at the beginning
Topic: Math
Published: 1/1/2009
Author: Isabel M Beichl
Abstract: No abstract
http://www.nist.gov/manuscript-publication-search.cfm?pub_id=900936