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Displaying 43426 - 43450 of 73812

Video Transmission for Multi-Hop Networks Using IEEE 802.11 FHSS

May 1, 2002
Author(s)
K Ban, Hamid Gharavi
In many applications such as construction, manufacturing, ground robotic vehicles, and rescue operations, there are many issues that necessitate the capability of transmitting digital video and that such transmissions should be performed wirelessly and in

Wafer Emissivity Effects on Light Pipe Radiometry in RTP Tools

May 1, 2002
Author(s)
Kenneth G. Kreider, David W. Allen, D H. Chen, D P. DeWitt, Christopher W. Meyer, Benjamin K. Tsai
We investigated the effect of different wafer emissivities and the effect of low emissivity films on RTP wafer temperature measurements using light pipe radiation thermometers (LPRTs). These tests were performed in the NIST RTP test bed. We used a NIST

Wavelength references for 1300-nm wavelength division multiplexing

May 1, 2002
Author(s)
Tasshi Dennis, E. A. Curtis, C. W. Oates, Leo W. Hollberg, Sarah L. Gilbert
We have conducted a study of potential wavelength calibration references for use as both moderate-accuracy transfer standards and high-accuracy National Institute of Standards and Technology (NIST) internal references in the 1280-1320 nm wavelength

Webpage for Optical Technology Division: SIRCUS Facility

May 1, 2002
Author(s)
Sally Bruce, Steven W. Brown, Keith R. Lykke
Spectral irradiance and Radiance Calibrations with Uniform Sources (SIRCUS) is a reference calibration facility that transfers detector based spectral irradiance scales derived from the High Accuracy Cryogenic Radiometer, to broadband filtered detector

Discharge of CF3I in a Cold Simulated Aircraft Engine Nacelle

April 30, 2002
Author(s)
Jiann C. Yang, Samuel L. Manzello, Marc R. Nyden, M D. Connaghan
An aircraft engine nacelle refers to the region between the engine body and its casing. Fuel and hydraulic lines, pumps, and lubrication systems are located within the nacelle. Air is vented through the nacelle to prevent any build-up of combustible vapors

Multi-Step Magnetic Switching in Single-Crystal (001) Co 2 MnGe Films

April 23, 2002
Author(s)
F Y. Yang, C H. Shang, T Ambrose, J J. Krebs, G A. Prinz, Valerian I. Nikitenko, V S. Gornakov, Alexander J. Shapiro, Robert D. Shull, C L. Chien
Multi-step magnetic switching with single, double, and triple loops has been observed in single-crystal (001) Co2MnGe Heusler alloy films epitaxially grown on GaAs (001) substrates due to a combined magnetic anisotropy consisting of cubic

Automatic Capture, Representation, and Analysis of User Behavior

April 22, 2002
Author(s)
Sharon J. Laskowski, J A. Landay, M Lister
With the advent of the Web and the refinement of instrumentation and monitoring tools, software user interactions are being captured on a much larger scale than ever before. Automated support for the capture, representation, and empirical analysis of user

Precessional switching in submicrometer spin valves

April 22, 2002
Author(s)
Shehzaad F. Kaka, Stephen E. Russek
Small spin valves are switched using a subnanosecond field pulse applied alongdg the magnetization hard-axis fields increases as the duration is decreased from 325 to 230 ps. This indicates a large-angle precessional motion in response to the transverse

Tri-Alpha-Napthyl Benzene as a Crystalline or Glassy MALDI Matrix

April 19, 2002
Author(s)
Barry J. Bauer, Charles M. Guttman, Da-Wei Liu, William R. Blair
Tri-alpha-napthyl benzene (TANB) is used as a matrix in matrix-assisted laser desorption/ionization (MALDI) spectroscopy. Electrosprayed TANB is crystalline and has a melting point of 180 2 C. A glass of TANB is obtained with a glass transition temperature

Performance of Personal Alert Safety Systems in Laboratory and Full-Scale Experiments

April 18, 2002
Author(s)
Nelson P. Bryner, Daniel M. Madrzykowski, D W. Stroup, J H. Lee
In 1998, over 500 firefighters in the United States were trapped in structure fires that resulted in injury or death of firefighters. Firefighters can be quickly overcome by the heat or smoke of a fire and may be unable to alert other fire ground personnel

The TREC-2001 Video Track Report

April 18, 2002
Author(s)
Alan Smeaton, Paul D. Over, R Taban
New in TREC-2001 was the Video Track, the goal of which was to promote progress in content-based retrieval from digital video open, metrics-based evaluation. The track built on publicly available video provided by the Open Video Project of the University

New Optical Metrology at NIST for Semiconductor Lithography

April 17, 2002
Author(s)
Ulf Griesmann, Tony L. Schmitz, Johannes A. Soons
Optical semiconductor lithography in the deep ultraviolet (DUV) and next generation lithographies such as extreme ultraviolet lithography (EUVL) create many new challenges for surface figure metrology. We discuss the needs for flatness metrology of silicon

IEEE 802.16 Marks Broadband Wireless Access Maturation

April 15, 2002
Author(s)
Roger Marks
With the completion of the IEEE Standard 802.16 WirelessMAN {trademark} air interface, broadband wireless access (BWA) is reaching maturity as a serious alternative for broadband access deployment. Once the 802.16 amendment is complete, the standard will

Polymerase Chain Reaction Amplification of DNA From Aged Blood Stains: Quantitative Evaluation of the Suitability for Purpose of Four Filter Papers as Archival Media

April 15, 2002
Author(s)
Margaret C. Kline, David L. Duewer, Janette W. Redman, John M. Butler, D A. Boyer
In collaboration with the Armed Forces Institute of Pathology's Department of Defense DNA Registry, the National Institute of Standards and Technology recently evaluated the performance of a short tandem repeat (STR) multiplex with dried whole blood stains

TREC-2001 Interactive Track Report

April 15, 2002
Author(s)
William Hersh, Paul D. Over
In the TREC 2001 Interactive Track six research teams carried out observational studies which increased the realism of the searching by allowing the use of data and search systems/tools publicly accessible via the Internet. To the extent possible

Parallel Cantilever Biaxial Micro-Positioner

April 12, 2002
Author(s)
E Amatucci, Nicholas Dagalakis
The Parallel Cantilever Biaxial Micro-Positioner (PCBMP) has a novel configuration and design in that it has two parallel sets of cantilever beam flexures. This design reduces crosstalk in the X and Y translations and creates motions that are more linear

Thermodynamics of Reactions Catalyzed by PABA Synthase

April 10, 2002
Author(s)
Yadu D. Tewari, P Y. Jensen, N Kishore, M P. Mayhew, J F. Parsons, Edward Eisenstein, Robert N. Goldberg
Microcalorimetry and high performance liquid chromatography (HPLC) have been used to conduct a thermodynamic investigation of reactions catalyzed by PABA synthase, the enzyme located at the first step in the shikimic acid metabolic pathway leading from
Displaying 43426 - 43450 of 73812
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