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Displaying 30976 - 31000 of 73830

Microfabricated Atomic Magnetometers and Applications

May 19, 2008
Author(s)
John E. Kitching, Svenja A. Knappe, Vishal Shah, P Schwindt, William C. Griffith, Ricardo Jimenez Martinez, Jan Preusser
We describe recent work at NIST to develop compact, sensitive atomic magnetometers using a combination of precision optical spectroscopy, atomic physics and techniques of micro-electro-mechanical systems (MEMS). These instruments have sensor head volumes

The Role of Folding in the Degradation of Ballistic Fibers

May 19, 2008
Author(s)
Walter G. McDonough, Gale A. Holmes, Jae Hyun Kim, Derek L. Ho
Research has indicated that the folding of ballistic fibers comprising soft body armor may be a factor in the performance deterioration that has been observed. To quantify the impact of this failure mechanism on body armor performance, an apparatus was

Time and Frequency Transfer Using a WAAS Satellite with L1 and L5 Code and Carrier

May 19, 2008
Author(s)
Marc A. Weiss, P Fenton, Edward Powers, A. Kropp, Raymond Pelletier
Two Wide Area Augmentation System (WAAS) satellites are now transmitting the standard L1 and L5 carriers and codes of the Global Positioning System (GPS). Since these are geostationary satellites, it is possible to aim a parabolic dish at one and obtain

Vibration-induced PM noise measurements of a rigid optical fiber spool

May 19, 2008
Author(s)
Jennifer A. Taylor, Craig W. Nelson, Archita Hati, Neil Ashby, David A. Howe
The opto-electronic oscillator (OEO) has emerged in recent years as an excellent low-noise source that rivals the best RF oscillators over broad offset frequencies. The main sources of noise in an OEO are the laser and RF modulator, photo detector, loop

ECS Transactions

May 18, 2008
Author(s)
Yaw S. Obeng, Stephen Knight, Joaquin (. Martinez
Nanoelectronics require the introduction of several new uncharacterized material(s) combinations and new processing techniques. The critical metrology and characterization needs of the nanoelectronics industry are being addressed with a broad range of

Combinatorial study of the crystallinity boundary in the HfO2-TiO2-Y2O3 system using pulsed laser deposition library thin films

May 16, 2008
Author(s)
Peter K. Schenck, Jennifer L. Klamo, Nabil Bassim, Peter G. Burke, Yvonne B. Gerbig, Martin L. Green
HfO2-TiO2-Y2O3 is an interesting high-k dielectric system. Combinatorial library films of this system enable the study of the role of composition on phase formation as well as optical and mechanical properties. A library film of this system deposited at

A Passive Heterodyne HEB Imager Operating at 850 GHz

May 15, 2008
Author(s)
Eyal Gerecht, Dazhen Gu, Lixing You, Sigfrid Yngvessen
We report the development and characterization of a passive heterodyne hot electron bolometer (HEB) imager operating at 850 GHz. HEB detectors provide unprecedented sensitivity and spectral resolution at terahertz frequencies covering the frequency range

Finite element analysis of a crack tip in silicate glass: No evidence for a plastic zone

May 15, 2008
Author(s)
Theo Fett, G Rizzi, D Creek, Susanne Wagner, J.P. Guinn, JM Lopez-Cepero, Sheldon M. Wiederhorn
Recently, the claim was made that cracks in silicate glasses propagate by the nucleation, growth, and coalescence of cavities at crack tips, which is the same way as in metals but at a much smaller scale. This hypothesis for crack growth is based in part

ISCD-NIST DXA Survey: Preliminary Report

May 15, 2008
Author(s)
Andrew M. Dienstfrey, Tammy L. Oreskovic, Lawrence T. Hudson, Herbert S. Bennett
This article reports and discusses briefly the preliminary results from the recent International Society for Clinical Densitometry (ISCD)-National Institute of Standards and Technology (NIST) dual-energy x-ray absorptiometry (DXA) Survey. The 1074 Survey

Peer Review Report: PHMSA Programs

May 14, 2008
Author(s)
Thomas A. Siewert, Michael Else, Richard J. Fields, Joe C. Bowles, L. J. Moore, Philip D. Flenner, Mario Macia, Jerry Rau, Steven E. Powell
The Pipeline and Hazardous Materials Safety Administration s (PHMSA) Pipeline Safety Research and Development (R&D) Program held its first structured peer review of active research projects in February 2006 and the most recent peer review on May 2008. The

Peer review report: Pipeline and hazardous materials safety administration, pipeline safety research and development program

May 14, 2008
Author(s)
Richard J. Fields, Louis E. Hayden, Thomas J. O'Grady, Joseph D. McColskey, Joe C. Bowles, T. R. Webb, Christopher N. McCowan, Dennis W. Hinnah, Ronald W. Haupt, Thomas A. Siewert
The purpose of this document is to report findings from the research peer reviews held March 27-29, 2007 for PHMSA's Pipeline Safety Research and Development Program. The findings and recommendations in this report derive from the scoring and comments

The Impact of the Dielectric / Semiconductor Interface on Microstructure and Charge Carrier Transport in High-Performance Polythiophene Transistors

May 14, 2008
Author(s)
Youngsuk Jung, Regis J. Kline, Eric K. Lin, Daniel A. Fischer, Michael F. Toney, Martin Heeney, Iain McCulloch, Dean DeLongchamp
The performance of organic field-effect transistors (OFETs) significantly depends on the properties of the interface between the semiconductor and gate dielectric. Here, we study the impact of chemically modified and morphologically controlled dielectrics

Aminoxyl (nitroxyl)Radicals in the Decomposition of RDX

May 13, 2008
Author(s)
Karl K. Irikura
The explosive RDX (1,3,5-trinitrohexahydro-s-triazine) is thought to decompose by homolytic N-N bond cleavage, among other possible initiation reactions. Quantum chemistry calculations show that the resulting aminyl radical can abstract an oxygen atom from

Relating Taxonomies with Regulations

May 13, 2008
Author(s)
Chin P. Cheng, Jiayi Pan, Gloria T. Lau, Kincho H. Law, Albert T. Jones
Increasingly, taxonomies are being developed for a wide variety of industrial domains and specific applications within those domains. These taxonomies attempt to represent formally the vocabularies commonly used by domain practitioners. These formal
Displaying 30976 - 31000 of 73830
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