NOTICE: Due to a lapse in annual appropriations, most of this website is not being updated. Learn more.

Form submissions will still be accepted but will not receive responses at this time. Sections of this site for programs using non-appropriated funds (such as NVLAP) or those that are excepted from the shutdown (such as CHIPS and NVD) will continue to be updated.

U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Search Publications

NIST Authors in Bold

Displaying 47376 - 47400 of 73697

Linear Procedures for Structures with Velocity-Dependent Dampers

August 1, 2000
Author(s)
Fahim Sadek, B Mohraz, Michael A. Riley
Passive energy dissipation devices are used to reduce the damaging effects of earthquakes. These devices can absorb a portion of the earthquake-induced energy in structures and thus reduce the energy demand on structural members. Wide acceptance of these

Microcalorimeter EDS: Benefits and Drawbacks

August 1, 2000
Author(s)
David A. Wollman, Dale Newbury, Sae Woo Nam, Gene C. Hilton, Kent D. Irwin, David A. Rudman, Steven Deiker, Norman F. Bergren, John M. Martinis
The commercial introduction of high-count-rate, near-room-temperature silicon drift detectors (presently available) and high-energy-resolution cryogenic microcalorimeters (forthcoming) is an exciting development in x-ray microanalysis, in which detector

Model of Particle Growth in Silane Discharges

August 1, 2000
Author(s)
Alan Gallagher
The growth of silicon particles in the neutral plasma region of pure silane, rf capacitively coupled, steady-state discharges is calculated with a homogenous, plasma-chemistry model. Plasma conditions are typical of those used in hydrogenated amorphous

Molecular Orientation of Single and Two-Armed Monodendron Semifluorinated Chains on Soft and Hard Surfaces Studied Using NEXAFS

August 1, 2000
Author(s)
Jan Genzer, E Sivaniah, E K. Kramer, J G. Wang, M Xiang, K Char, Christopher K. Ober, Robert A. Bubeck, Daniel A. Fischer, M Graupe, R Colorado, O E. Shmakova, T R. Lee
Near-edge absorption fine structure (NEXAFS) measurements are used to probe the molecular orientation of semifluorinated (SF) mesogens, -(CH 2)x(CF 2)yF, which are attached to I) the isoprene backbone of polyisoprene or a styrene-isoprene diblock copolymer

Morphological Partitioning of Ethylene Defects in Random Propylene-Ethylene Copolymers

August 1, 2000
Author(s)
R G. Alamo, David L. VanderHart, Marc R. Nyden, L Mandelkern
A series of four propylene/ethylene, metallocene-catalyzed copolymer samples, with ethylene mole fractions ranging from 0.8 to 7.5 mol % and melt-crystallization histories of cooling at 1 C/min, were studied by 13C solid state NMR techniques. The principal

Multizone Modeling as an Indoor Air Quality Design Tool

August 1, 2000
Author(s)
Amy Musser
Increased public awareness and changing industry standards have highlighted the importance of indoor air quality in the building design process. At the same time, many owners would like to construct buildings that conserve energy and minimize environmental

Neutron Reflectivity Study of Diblock Formation During Reactive Blending Processes

August 1, 2000
Author(s)
Makoto Hayashi, H Grull, A R. Esker, M J. Weber, Li Piin Sung, Sushil K. Satija, Charles C. Han, TT Hashimoto
In a series of neutron reflectivity experiments, we studied the fundamental process of diblock formation during reactive blending processes of an immiscible blend comprised of normal polysulfone (hPSU) containing 30 % reactive endgroup-modified deuterated

NIST Workshop on Needs for Reference Biomaterials

August 1, 2000
Author(s)
John A. Tesk
On November 13, 1998, a workshop was held at the National Institute of Standards and Technology (NIST) to obtain a clearer assessment of the current needs for reference biomaterials (RBMs) with regard to standards, research, and regulatory purposes. In

Observation of Resonances Associated With Stereo and Regio Defects in the Crystalline Regions of Isotatic Polypropylene: Towards a Determination of Morphological Partitioning

August 1, 2000
Author(s)
David L. VanderHart, R G. Alamo, Marc R. Nyden, M S. Kim, L Mandelkern
We report defect-resonance patterns associated with 2 kinds of low-concentration defects typically found in metallocene-synthesized isotactic polypropylenes (iPPs). These defects are the simple mrrm stereo defect and the regio 2,1-erythro defect. This work

Optical Fiber Power Meter Nonlinearity Calibrations at NIST

August 1, 2000
Author(s)
Igor Vayshenker, Shao Yang, Xiaoyu X. Li, Thomas Scott, Christopher L. Cromer
We describe a system for measuring the response nonlinearity of optical fiber power meters and detectors over a wide power dynamic range at telecommunication wavelengths. The system uses optical fiber components and is designed to accommodate commonly used

Percolation Aspects of Cement Paste and Concrete - Properties and Durability

August 1, 2000
Author(s)
Edward J. Garboczi, Dale P. Bentz
Synopsis: Portland cement concrete is a composite material, where the matrix consists of portland cement paste. Cement paste forms from the hydration reaction of portland cement with water. The microstructure of cement paste changes drastically over a time

Performance Metrics for Intelligent Systems

August 1, 2000
Author(s)
John Evans, Elena R. Messina
Research into intelligent systems and intelligent control is burgeoning. However, there is no consensus on how to define or measure an intelligent system. This lack of rigor hinders the ability to measure progress in the field and to compare different

Phonons and Static Dielectric Constant in CaTiO 3 From First Principles

August 1, 2000
Author(s)
Eric J. Cockayne, Benjamin P. Burton
CaTiO 3 has a static dielectric constant that extrapolates to a value greater than 300 at zero temperature. We investigate the origin of this large dielectric response on a microscopic level, using first-principles plane-wave pseudopotential density
Displaying 47376 - 47400 of 73697
Was this page helpful?