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Search Publications

NIST Authors in Bold

Displaying 45326 - 45350 of 73960

Studies of polymer-filler interactions in filled systems

August 1, 2001
Author(s)
Alamgir Karim, Jack F. Douglas, K A. Barnes, A Nakatani, D W. Liu, Eric J. Amis
We observe that the presence of filler partiocles can have a major impact on the properties of filled polymer blend materials. The filler particles, which are found in many commercial polymer blends, modify the phase boundary (interfacial tension, rate of

Surface and Interface Effects in the Growth of Giant Magnetoresistance Spin Valves for Ultrahigh-Density Data-Storage Applications

August 1, 2001
Author(s)
William F. Egelhoff Jr., P J. Chen, Cedric J. Powell, Robert D. McMichael, Mark D. Stiles
The current generation of hard disk drives use Giant Magnetoresistance (GMR) spin valves as the read-head because the GMR effect is currently the most sensitive way to detect magnetic fields at submicron length scales and data rates of {approximately equal

Temporal Character of Pulsed-Laser Cone Emission

August 1, 2001
Author(s)
W Gawlik, R Shuker, Alan Gallagher
Temporal character of cone emission from Sr vapor excited with 3 ns, near-resonant laser pulses is studied with 0.5 ns resolution. The cone pulses appear significantly narrower than the laser pulse. Their properties (amplitude, width, energy, delay and

The Art and Science of Lamp Photometry

August 1, 2001
Author(s)
R S. Bergman, Yoshi Ohno
This paper first overviews photometric quantities of lamps - luminous flux, luminous intensity, illuminance, and luminance - and general techniques for measurement of these quantities to characterize lamps. The total luminous flux of lamps (in lumens) is

The Conformational Structures and Dipole Moments of Ethyl Sulfide in the Gas Phase

August 1, 2001
Author(s)
David F. Plusquellic, R D. Suenram, B Mate, J O. Jensen, A C. Samuels
The pure rotational spectrum of ethyl sulfide has been measured from 12 gHz to 21 GHz in a 1 K Jet-cooled expansion using a Fourier-transform microwave (FTMW) spectrometer. Prominent features in the spectrum are assigned to transitions from three

Thermochemistry of Adenosine

August 1, 2001
Author(s)
J A. Boerio-Goates, M R. Francis, Robert N. Goldberg, M A. Ribeiro da Silva, M D. Ribeiro da Silva, Yadu D. Tewari
The thermochemistry of adenosine(cr) was studied by a variety of methods: the standard (pressure p = 0.1 MPa) molar enthalpy of combustion in oxygen at T = 298.15 K was measured by means of combustion calorimetry and was found to be Δ} cH m = -(5139.4 3.3)

Total Luminous Flux Calibrations of LEDs at NIST

August 1, 2001
Author(s)
Carl C. Miller, Yoshihiro Ohno
The total luminous flux (lumen) is one of the most important characteristics of Light Emitting Diodes (LEDs), and is commonly measured using integrating sphere photometers. Large variations of measurement results are reported among different manufacturers

Toward Self-Integrating Software Applications for Supply Chain

August 1, 2001
Author(s)
Michael Gruninger, Nenad Ivezic, Albert W. Jones
Each paper in this special issue deals with a particular aspect of supply chain management. Nevertheless, they all point to a common need for meaningful and timely information exchange across the supply chain. The Internet and the existing Web technologies

Understanding TREC Results - the Role of Statistics

August 1, 2001
Author(s)
Walter S. Liggett Jr, Paul D. Over
The challenge in empirical development of information retrieval systems at TREC is obtaining general conclusions from IR system responses to a sample of perhaps 50 topics, that is, 50 statements of information need. Treating such a sample as a simple

Basic Procedures in Force Calibration at NIST

July 29, 2001
Author(s)
Ricky L. Seifarth, Samuel L. Ho
Force calibrations obtainable at the National Institute of Standards and Technology (NIST) continue to focus on extracting the maximum performance from the primary force standard deadweight machines, the ratiometric electrical readout systems and the

The Effect of Query Choice on Information Retrieval

July 20, 2001
Author(s)
Walter S. Liggett Jr, C E. Buckley
Analysis of the Query Track of the Eighth Text Retrieval Conference (TREC-8) shows how the presence or absence of a word or two in a query can make a large difference in information retrieval performance. The Query Track contains results from 8 systems

PVT Measurements for Toluene in the Near-Critical and Supercritical Regions

July 19, 2001
Author(s)
Asbat E. Bazaev, Ilmutdin Abdulagatov, Joe W. Magee, Emil Bazaev, Michail Rabezkii
The PVT relationships of toluene were measured in the near-critical and supercritical regions. Measurements were made using a constant-volume peizometer immersed in a precision thermostat. The volume of the piezometer V PT was corrected for both
Displaying 45326 - 45350 of 73960
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