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Search Publications

NIST Authors in Bold

Displaying 42476 - 42500 of 73697

Surface and Interface Properties of PVDF/Acrylic Copolymer Blends

November 1, 2002
Author(s)
Xiaohong Gu, Tinh Nguyen, Mark R. VanLandingham, D Nguyen
Poly(vinylidene fluoride) (PVDF) is commonly blended with amorphous polymers to improve its optical property. The surface and interface properties of PVDF blended with different amounts of poly(methyl methacrylate) and poly(ethyl acrylate) copolymer (PMMA

Systems Administration Guidance for Securing Microsoft Windows 2000 Professional System

November 1, 2002
Author(s)
Murugiah P. Souppaya, Anthony B. Harris, Mark McLarnon, Nikolaos Selimis
The document is intended to assist the users and system administrators of Windows 2000 Professional systems in configuring their hosts by providing configuration templates and security checklists. The guide provides detailed information about the security

Talking Ceramics

November 1, 2002
Author(s)
Terrell A. Vanderah
This is an invited Perspective article describing the technical needs and state-of-the-art research activities in the materials science of microwave ceramics, especially dielectric materials which serve as critical elements in resonators and filters

Temperature Dependence of the Acid Dissociation Constant of the Hydroxyl Radical

November 1, 2002
Author(s)
G A. Poskrebyshev, Pedatsur Neta, Robert E. Huie
The acid dissociation constant of the hydroxyl radical in aqueous solution was determined by pulse radiolysis from the pH dependence of the rate constant for reaction of the OH/O - radical with benzoate ions. The rate constant and the pKa( OH) values were

The Development of Microcalorimeter EDS Arrays

November 1, 2002
Author(s)
Kent D. Irwin, James A. Beall, Steven Deiker, Gene C. Hilton, L. King, Sae Woo Nam, Dale Newbury, Carl D. Reintsema, John A. Small, Leila R. Vale
High-energy-resolution cryogenic microcalorimeters are a powerful new tool for x-ray microanalysis. With demonstrated energy resolution 20 times better than with conventional semiconductor EDS, microcalorimeters are useful in applications such as nanoscale

Ultracold Ground-State Molecule Production in Sodium

November 1, 2002
Author(s)
F K. Fatemi, Kevin Jones, Paul D. Lett, Eite Tiesinga
We have observed the formation of ground state Na 2 molecules via the spontaneous decay of excited molecules created by the photoassociation of ultracold atoms. We measure the energies of ground state molecules formed in three hyperfine components of the

Knowledge Engineering for Real Time Control

October 30, 2002
Author(s)
John Evans, Elena R. Messina, James S. Albus, Craig I. Schlenoff
The key to real-time intelligent control lies in the knowledge models that the system contains. Three main classes of knowledge are identified: parametric, geometric/iconic, and symbolic. Each of these classes provides unique perspectives and advantages

Towards a Formal Representation of Driving Behaviors

October 28, 2002
Author(s)
Craig I. Schlenoff, Michael Gruninger
To successfully perform their required tasks, intelligent information agents require accurate and meaningful communication and integration among other agents and information resources. However, the applications and infrastructure of information technology

Thermal Component Models for Electro-Thermal Analysis of Multichip Power Modules

October 24, 2002
Author(s)
J J. Rodriguez, John V. Reichl, Zharadeen R. Parrilla, Allen R. Hefner Jr., David W. Berning, M Velez-Reyes, Jih-Sheng Lai
Thermal component models are developed for multi-chip IGBT power electronic modules (PEM) and associated high-power converter heatsinks. The models are implemented in SABER and are combined with the electro-thermal IGBT and diode models to simulate the

Testing with Model Checkers: Insuring Fault Visibility

October 23, 2002
Author(s)
Vadim Okun, Paul E. Black, Y Yesha
To detect a fault in software, a test case execution must be chosen so intermediate errors propagate to the output. We describe two modeling methods for specification-based mutation testing using model checkers that guarantee this propagation. We evaluate

Development of High Throughput Methods for Polymer Nanocomposite Research

October 22, 2002
Author(s)
Jeffrey W. Gilman, Rick D. Davis, Marc R. Nyden, Takashi Kashiwagi, John R. Shields, W -. Demory
This chapter will present an overview of the development of two high throughput (HT) methods: 1) preparation of formulated polymer libraries using extrusion, 2) screening of flammability properties using flame spread measurements.

Defect Generation in Ultra-thin Oxide Over Large Fluence Range

October 21, 2002
Author(s)
Da-Wei Heh, Eric M. Vogel, J B. Bernstein
The defect generation rate (P g) during constant voltage stress is investigated by using short-time voltage pulses over large fluence range. It is found that P g is not constant as a function of injected charge and the voltage acceleration of P g in the

Round Robin Assessment of the Single Fiber Fragmentation Test

October 21, 2002
Author(s)
M J. Rich, L T. Drzal, Donald L. Hunston, Gale A. Holmes, Walter G. McDonough
The Versailles Project on Advanced Materials and Standards (VAMAS) was established following an economic summit meeting in 1982 held at Versailles by the Heads of State of the seven leading industrial nations and representatives from the Commission of the

Stiffness and Failure Behavior of Model Hybrid Composites

October 21, 2002
Author(s)
Donald L. Hunston, Walter G. McDonough
Many applications are exploring the use of hybrid composites; i.e., polymers reinforced with two different types of fibers, because such systems can have a superior balance of properties and/or a better balance of properties and cost. Unfortunately, the
Displaying 42476 - 42500 of 73697
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