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Displaying 37701 - 37725 of 74047

Microwave SQUID multiplexer

September 13, 2004
Author(s)
Kent D. Irwin, Konrad Lehnert
We describe a superconducting quantum interference device (SQUID) multiplexer operated at microwave frequencies. The outputs of multiple SQUIDs are simultaneously modulated at different frequencies, frequency-division multiplexed, and amplified using a

Vapour Pressure of Diethyl Phthalate

September 11, 2004
Author(s)
Vladimir Rohac, Kvetoslav Ruzicka, Vlastimil Ruzicka, Dzmitry H. Zaitsau, Gennady J. Kabo, Vladimir Diky, Karel Aim
Measurements of vapour pressure in the liquid phase and of enthalpy of vaporisation and results of calculation of ideal gas properties for diethyl phthalate are reported. The method of comparative ebulliometry, the static method, and the Knudsen mass loss

3rd Annual PKI R&D Workshop Proceedings

September 8, 2004
Author(s)
K I. Sankar, William Polk, Nelson Hastings
NIST hosted the third annual Public Key Infrastructure (PKI) Research Workshop on April 12-14, 2004. The two and a half day event brought together PKI experts from academia, industry, and government to explore the remaining challenges in deploying public

Antenna Gain Factor Equivanlent for TEM Cells

September 6, 2004
Author(s)
Perry F. Wilson
This paper derives a gain factor equivalent for TEM cells. The gain factor is then used in simple transmission fomulas to investigate emissions tests in TEM cells and correlation of TEM cell emissions measuremetns to other methods. The correlation

The Effects of Loading Configurations on the Performance of Reverberation Chambers

September 6, 2004
Author(s)
Christopher L. Holloway, Todd Lammers, John M. Ladbury
The presence of lossy objects in reverberation chamber may significantly disturb the reverberant environment and affect the desired field statistics. In this paper, we present a numerical study of the effects of different loading configurations on the

Structure of Polystyrene at the Interface With Various Liquids

September 4, 2004
Author(s)
Clayton S. Yang, P T. Wilson, Lee J. Richter
Vibrationally resonant sum frequency generation (VR-SFG) is used to determine the structure of the phenyl side groups of deuterated polystyrene at the liquid/solid interface for the nonsolvent liquids: hexane, methanol, ethanol, glycerol, and water. The

Structure of Alanine Dehydrogenase from Archaeoglobus: Active Site Analysis and Relation to Bacterial Cyclodeaminases and Mammalian mu Crystallin

September 3, 2004
Author(s)
David T. Gallagher, H G. Monbouquette, I Schroder, Hugh Robinson, Marcia J. Holden, N Smith
The hyperthermophilic archaeon Archaeoglobus fulgidus contains an L-Ala dehydrogenase (AlaDH, EC 1.4.1.1) that is not homologous to known bacterial dehydrogenases and appears to represent a previously unrecognized archaeal group of NAD-dependent

Letter Report of a Life Cycle Cost Analysis for GSA Chillers

September 2, 2004
Author(s)
Mark A. Kedzierski
A life-cycle-cost analysis revealed that the combined GSA regions would save nearly half a billion dollars over 15 years in electricity costs with a hypothetical 30 % increase in chiller efficiency. The largest savings were apparent for GSA regions 2, 4, 7

4p 6 4d 8 -(4d 7 5p+4d 7 4f+4p 5 4d 9 ) Transitions in Xe XI

September 1, 2004
Author(s)
S S. Churilov, Y N. Joshi, Joseph Reader, R R. Kildiyarova
The spectrum of ten-times ionized xenon Xe XI was observed in the region 105 Angstrom} to 157 Angstrom} with a low-inductance vacuum spark and a 10.7 m grazing-incidence spectrograph. About 200 lines belonging to the 4p 64d 8-(4d 75p+4d 74f+4p 54d 9)

A Neutral Data Interface Specification for Simulating Machine Shop Operations

September 1, 2004
Author(s)
Yung-Tsun Lee, Charles R. McLean
In most cases, the effort required to develop a meaningful simulation for a small machine shop exceeds the resources available. Machine shops typically do not have staff with appropriate technical qualifications required to develop custom simulations of

Accuracy limits for simple molecular absorption based wavelength references

September 1, 2004
Author(s)
William C. Swann, Sarah L. Gilbert
We present limitations on the characterization and use of molecular absorption lines for wavelength calibration purposes. These limits assume a Doppler and pressure-broadened absorption spectrum obtained by transmitting light through a simple gas cell

An Integrating Framework for Modeling and Simulation for Emergency Response

September 1, 2004
Author(s)
Sanjay Jain, Charles R. McLean
A number of modeling and simulation tools have been developed and more are being developed for emergency response applications. Each of these tools has focused on a specific aspect of the selected problem, for example, the modeling of spread of an agent

Applications of PSL to Semantic Web Services

September 1, 2004
Author(s)
Michael Gruninger
In this paper we will show how the ontology of the Process Specification Language can be used as an upper-level process ontology that serves as the semantic foundation for the DAML-S ontology for web services.

Counterion associative behavior with flexible polyelectrolytes

September 1, 2004
Author(s)
Vivek M. Prabhu, Eric J. Amis, N S. Rosov
At low ionic strength, organic counterions dress a flexible charged polymer as measured directly by small-angle neutron scattering (SANS) and neutron spin-echo (NSE) spectroscopy. This dressed state, quantified by the concentration dependence of the static

Development Life Cycle and Tools for XML Content Models

September 1, 2004
Author(s)
Boonserm Kulvatunyou, KC Morris, Jeong Buhwan, Puja Goyal
Many integration projects today rely on shared semantic models based on standards represented using Extensible Mark up Language (XML) technologies. Shared semantic models typically evolve and require maintenance. In addition, to promote interoperability

Dielectric Spectroscopy During Extrusion Processing of Polymer Nanocomposites: a High Throughput Processing/Characterization Method to Measure Layered Silicate Content and Exfoliation

September 1, 2004
Author(s)
Rick D. Davis, Anthony J. Bur, M M. McBrearty, Y E. Lee, Jeffrey W. Gilman, P R. Start
Dielectric spectroscopy was conducted during extrusion processing of polyamide-6 (PA6) and layered silicate/polyamide-6 nanocomposites. Dielectric dispersion parameters were identified that appear sensitive to layered silicate concentration and degree of
Displaying 37701 - 37725 of 74047