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Displaying 38451 - 38475 of 73829

Precision Feshbach Spectroscopy of Ultracold Cs-2

September 1, 2004
Author(s)
C Chin, Vladan Vuletic, A J. Kerman, S G. Chu, Eite Tiesinga, P J. Leo, Carl J. Williams
We have observed > 60 magnetic field-induced Feshbach resonances in ultra-cold collisions of ground-state cesium atoms. The resonances have been detected using three different scattering processes: elastic collisions, inelastic collisions and radiative

Rate Adaptive Video Transmission Over Ad-Hoc Networks

September 1, 2004
Author(s)
Hamid Gharavi, K Ban
In mobile ad-hoc network environments where the network topology is expected to change considerably, providing reliable video communications is a challenging task. This paper is mainly concerned with developing a packet control mechanism to reduce bursts

Real-Time Monitoring of Polymer Nanocomposites Composition during Extrusion Compounding

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

Sooting Behavior of Ethanol Droplet Combustion at Elevated Pressures Under Microgravity Conditions

September 1, 2004
Author(s)
B D. Urban, K Kroenlein, A Kazakov, F L. Dryer, A Yozgatligil, M Y. Choi, Samuel Manzello, K O. Lee, R Dobashi
Liquid ethanol is widely used in practical fuels as a means to extend petroleum-derived resources or as a fuel additive to reduce emissions of carbon monoxide from spark ignition engines. Recent research has also suggested that ethanol and other oxygenates

Technical Digest, Symposium on Optical Fiber Measurements 2004

September 1, 2004
Author(s)
Paul A. Williams, Gordon W. Day
This digest is made up of technical papers presented at the 13th biennial Symposium on Optical Fiber Measurements (SOFM 2004)in Boulder, Colorado, September 28-30, 2004. Paper categories include wavelength metrology, nonlinear measurements, fiber

Template Fabrication of Protein-Functionalized Gold-Polypyrrole-Gold Segmented Nanowires

September 1, 2004
Author(s)
R M. Hernandez, Lee J. Richter, Stephen Semancik, Stephan J. Stranick, Thomas E. Mallouk
Gold nanowires containing protein-modified poly(pyrrole) (Ppy) junctions were synthesized electrochemically using porous aluminum oxide as a template. The effects of the conditions of electrochemical synthesis on Ppy growth and protein (avidin or

The NIST 3 Megawatt Quantitative Heat Release Rate Facility - Description and Procedures

September 1, 2004
Author(s)
Rodney A. Bryant, Thomas J. Ohlemiller, Erik L. Johnsson, Anthony P. Hamins, B S. Grove, William F. Guthrie, Alexander Maranghides, George W. Mulholland
The 3 Megawatt Heat Release Rate Facility was developed at NIST as a first step toward having broad capabilities for making quantitative large scale fire measurements. Such capabilities will be used at NIST to validate fire models and to develop sub-grid

Transformation of Phase Size Distribution Into Scattering Intensity

September 1, 2004
Author(s)
Barry J. Bauer
A practical method of calculating the small angle scattering intensity (SAS) and the density correlation function (CF) from the phase size distribution (PSD) is presented for a sample with a two-phase morphology. The CF can be calculated in terms of joint

Triple-Detector GPC Characterization and Processing Behavior of Long-Chain-Branched Polyethylene Prepared by Solution Polymerization With Constrained Geometry Catalyst

September 1, 2004
Author(s)
W Wang, S B. Kharchenko, Kalman D. Migler, S Zhu
Fourteen long-chain branched (LCB) polyethylene (PE) samples were prepared by a constrained geometry catalyst. The PE samples had average branching frequencies of 0.06 to 0.98 branches per polymer chain, determined by 13C NMR. These samples as well as five

Uncertainty Analysis of Radar Cross Section Calibration at Etcheron Valley Range

September 1, 2004
Author(s)
Lorant A. Muth, Dale M. Diamond, John A. Lelis
The Etcheron Valley Range, Naval Air Warfare Center, Weapons Division at China Lake, CA conducts monostatic and bistatic radar cross section measurements on various targets of interest to DoD. This document, which follows general guidelines proposed by the

Uncertainty and Traceability for the CEESI Iowa Natural Gas Facility

September 1, 2004
Author(s)
Aaron N. Johnson, Tom Kegel
This paper presents an uncertainty analysis for the CEESI Iowa natural gas calibration facility. This facility calibrates flow meters up to flows of 10.7 actual m3/s, at nominal pressures of 174 kPa. Flow meters are calibrated by a set of nine turbine
Displaying 38451 - 38475 of 73829
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