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Displaying 45776 - 45800 of 74141

Thermodynamic Regulation of Actin Polymerization

June 1, 2001
Author(s)
P S. Niranjan, J G. Forbes, S C. Greer, J Dudowicz, Karl Freed, Jack F. Douglas
A Flory-Huggins-type lattice model of actin polymerization under equilibrium conditions is employed to analyze new spectroscopic measurements for the extent of actin polymerization diameter} as a function of temperature T, salt concentration [KC1], and the

Towards Multiscale Simulations of Filled and Nanofilled Polymers

June 1, 2001
Author(s)
S C. Glotzer, Francis W. Starr
We perform simulations of filled and nanofilled polymers using a combination of molecular and mesoscale simulation techniques. Molecular dynamics simulations provide insight into the effect of a nanoscopic filler on the structure, dynamics, and glass

Transient Application, Recirculating Pool Fire, Agent Effectiveness Screen. Final Report.

June 1, 2001
Author(s)
William L. Grosshandler, Anthony P. Hamins, Jiann C. Yang, Kevin B. McGrattan, Cary Presser
A three-year research effort has been conducted as part of the Next Generation Program (NGP) to develop a laboratory screening device suitable for predicting the behavior of halon alternatives in full-scale fire suppression experiments. Most of the work

Uncertainty of the NIST Low Frost-Point Humidity Generator

June 1, 2001
Author(s)
Gregory E. Scace, Joseph T. Hodges
The NIST Low Frost-point Humidity Generator (LFPG) produces water vapor gas mixtures with mole fractions from approximately 5 nmol/mol to 4 mmol/mol for research, calibration of transfer standards, and testing and development of new humidity

Using Ab Initio Calculations in the CALPHAD Environment

June 1, 2001
Author(s)
Benjamin P. Burton, N Dupin, S Fries, G Grimvall, A F. Guillermet, P Miodownik, W A. Oates, V Vinograd
Previous Ringberg working groups have discussed possible applications of first principles (FP) calculations to CALPHAD modeling, and have considered the problems from neglect of short range order (SRO) in CALPHAD Gibbs energy models [1]. Particular

Validation of Scanning Probe Moire Technique With the CTE of Gold

June 1, 2001
Author(s)
Elizabeth S. Drexler, T A. Winningham
Low expansion materials used in electronic devices require a tool that has a commensurate resolution for measuring deformation, such as the atomic force or scanning probe microscope (SPM). The SPM was evaluated for this purpose by conducting experiments

X-Ray Metrology by Diffraction and Reflectivity

June 1, 2001
Author(s)
D K. Bowen, R Deslattes
X-ray methods can provide measurements that, for certain parameters of great technological importance, are the most accurate and sensitive available. Their importance is likely to grow as layer thicknesses shrink, and as novel materials such as porous

Hysteresis in transport critical-current measurements of oxide superconductors

May 31, 2001
Author(s)
Loren F. Goodrich, Theodore C. Stauffer
We investigated magnetic hysteresis in transport critical-current (I c) measurement of Ag-matrix (B i,Pb) 2Sr 2Ca 2Cu 3O^10-x^ *Bi-2223) and AgMg-matrix Bi 2Sr 2CaCu 2O 8+X (Bi-2212) tapes. The effect of magnetic hysteresis on the measured critical current

Electronic Interconnection Standards for E-Commerce

May 28, 2001
Author(s)
Michael McLay
The IPC Data Transfer Solutions (DTS) committee has created the Electronic Interconnection Standards for E-Commerce (the IPC-2500 series) to support the industry need for standard communication protocols within an enterprise as well as between trading

Security Requirements for Cryptographic Modules [includes Change Notices as of 12/3/2002]

May 25, 2001
Author(s)
National Institute of Standards and Technology (NIST), Annabelle Lee, Miles E. Smid, Stanley R. Snouffer
This Federal Information Processing Standard (140-2) specifies the security requirements that will be satisfied by a cryptographic module, providing four increasing, qualitative levels intended to cover a wide range of potential applications and

Physical and Chemical Aspects of Fire Suppression in Extraterrestrial Environments

May 22, 2001
Author(s)
Fumiaki Takahashi, Gregory T. Linteris, Vishwanath R. Katta
A fire, whether in a spacecraft or in occupied spaces on extraterrestrial bases, can lead to mission termination or loss of life. While the fire-safety record of US space missions has been excellent, the advent of longer duration missions to Mars, the moon

Trioxane-Air Counterflow Diffusion Flames in Normal and Microgravity

May 22, 2001
Author(s)
Gregory T. Linteris, M D. Rumminger, D L. Urban
Trioxane, a weakly bound polymer of formaldehyde (C3H6O3, melting point 61 deg C, boiling point 115 deg C), is a uniquely suited compound for studying material flammability. Like many of the more commonly used materials for such tests (e.g. delrin

Broadband Josephson Voltage Standards

May 20, 2001
Author(s)
Clark A. Hamilton, Samuel P. Benz
A Josephson junction is a perfect frequency to voltage converter, that is, V=f/K j where K j = 483597.9 GHz/V. This unique property has been used to convert a narrow (1 Hz) band 75 GHz reference frequency to a dc voltage standard. Josephson standards use

A Statistical Test Suite for Random and Pseudorandom Number Generators for Cryptographic Applications

May 15, 2001
Author(s)
Andrew L. Rukhin, Juan Soto, James R. Nechvatal, Miles E. Smid, Elaine B. Barker, Stefan D. Leigh, M Levenson, M Vangel, D L. Banks, Nathanael A. Heckert, James F. Dray Jr., S C. Vo
[Superseded by SP 800-22 Revision 1a (April 2010): http://www.nist.gov/manuscript-publication-search.cfm?pub_id=906762] This paper discusses some aspects of selecting and testing random and pseudorandom number generators. The outputs of such generators may
Displaying 45776 - 45800 of 74141
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