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Displaying 31051 - 31075 of 73830

Methods for Producing Optical Coherent State Superpositions

May 1, 2008
Author(s)
Scott C. Glancy, Hilma M. Vasconcelos
We discuss several methods to produce superpositions of optical coherent states (also known as "cat states"). Cat states have remarkable properties which could allow them to be powerful tools for quantum information processing and metrology. A number of

Mode-selective acoustic spectroscopy of trigonal piezoelectric crystals

May 1, 2008
Author(s)
Ward L. Johnson, Carlos F. Martino, Sudook A. Kim, Paul R. Heyliger
A noncontacting electromagnetic-acoustic-resonance technique is presented for generating and detecting vibrational modes with prescribed symmetries in piezoelectric trigonal crystals with cylindrical geometry. This technique provides the experimental basis

On the Development and Characterization of a Firebrand Generator

May 1, 2008
Author(s)
Samuel L. Manzello, John R. Shields, Thomas G. Cleary, Alexander Maranghides, William E. Mell, Yoshihiko Hayashi, Daisaku Nii, Tsuyoshi Kurita
An experimental apparatus has been constructed in order to generate a controlled and repeatable size and mass distribution of glowing firebrands. The present study reports on a series of experiments conducted in order to characterize the performance of

On the Development and Characterization of a Firebrand Generator

May 1, 2008
Author(s)
Samuel L. Manzello, John R. Shields, Thomas G. Cleary, Alexander Maranghides, William E. Mell, Jiann C. Yang, Yoshihiko Hayashi, Daisaku Nii, Tsuyoshi Kurita
A unique experimental apparatus has been constructed in order to generate a controlled and repeatable size and mass distribution of glowing firebrands. The present study reports on a series of experiments conducted in order to characterize the performance

Optical fiber metrology

May 1, 2008
Author(s)
Gordon W. Day, Douglas L. Franzen, Kent B. Rochford
The development of metrology to support the optical fiber communications industry is an excellent case study of how stakeholders ? fiber manufacturers, their customers, standards-developing organizations, and (in the U.S.) the Federal Government ? worked

Understanding the IPC 175X Data Model

May 1, 2008
Author(s)
Eric D. Simmon, John V. Messina
More and more political bodies (countries, states, and unions) are enacting legislation designed to protect the environment from the impact of manufacturing. One category of restrictive legislation is called Extended Producer Responsibilities (EPR). The

Collaborating with Customers

April 30, 2008
Author(s)
Mylene S. Ouimette, Jo Ann Remshard
Moving to a new information or knowledge management system can be a challenge for any institution, but for a large federal government agency the scope of such a project and the effort required can be particularly demanding. This article describes training

Fifty years of AAPM Involvement in Radiation Dosimetry

April 30, 2008
Author(s)
Geoffrey S. Ibbott, C-M Ma, D W O Rogers, Stephen M. Seltzer, J Williamson
This paper reviews the involvement of the AAPM in various aspects of radiation dosimetry over its fifty year history, emphasizing the especially important role that external beam dosimetry played in the early formation of the organization. Topics covered

Measurements for the Reliability and Electrical Characterization of Semiconductor Nanowires

April 30, 2008
Author(s)
Curt A. Richter, Hao Xiong, Xiaoxiao Zhu, Wenyong Wang, Vincent M. Stanford, Qiliang Li, D. E. Ioannou, Woong-Ki Hong, Takhee Lee
Nanoelectronic devices based upon self-assembled semiconductor nanowires are excellent research tools for investigating the behavior of structures with sub-lithographic features as well as a promising basis for future information processing technologies

Metrology and Standards Needs of Some Categories of Medical Devices

April 30, 2008
Author(s)
J C. Chiao, Julian M. Goldman, David A. Heck, Peter Kazanzides, William J. Peine, James B. Stiehl, Dwight Yen, Nicholas Dagalakis
With rapid advances in meso, micro and nano scale technology devices and electronics a new generation of advance medical devices is emerging, which promises less invasive and more accurate, automated and effective medical treatments. We examined the

On The TREC Blog Track

April 30, 2008
Author(s)
Iadh Ounis, Craig Macdonald, Ian Soboroff
The rise of blogging as a new grassroots publishing medium and the many interesting peculiarities that characterize blogs compared to other genres of documents opened up several new interesting research areas in the information retrieval field. The Blog

STRESS-INDUCED DEFECT GENERATION IN HFO2/SIO2 STACKS OBSERVED BY USING CHARGE PUMPING AND LOW FREQUENCY NOISE MEASUREMENTS

April 30, 2008
Author(s)
Hao Xiong, Dawei Heh, Shuo Yang, Moshe Gurfinkel, Gennadi Bersuker, D. E. Ioannou, Curt A. Richter, Kin P. Cheung, John S. Suehle
A novel approach combining the low frequency drain current noise and the frequency-dependent charge pumping techniques has been employed to extract the trap densities in both the interfacial SiO2 layer and high-k layer in the n-type MOSFETs with HfO2/SiO2

Measured Performance of Three Residential Fuel Cell Systems

April 29, 2008
Author(s)
Mark W. Davis
Under a program to develop a consumer-oriented rating methodology for residential cogeneration fuel cells, the performance of three systems was characterized in the NIST Residential Fuel Cell Test Facility. These systems differed with respect to the type

Tight Bounds for the Multiplicative Complexity of Symmetric Functions

April 28, 2008
Author(s)
Joan Boyar, Rene Peralta
The multiplicative complexity of a Boolean function f is defined as the minimum number of binary conjunction (AND) gates required to construct a circuit representing f , when only exclusive-or, conjunction and negation gates may be used. This article

THE FAST INITIAL THRESHOLD VOLTAGE SHIFT: NBTI OR HIGH-FIELD STRESS

April 27, 2008
Author(s)
Jason P. Campbell, Kin P. Cheung, John S. Suehle
Recent 'NBTI' studies have come to involve very high electric fields, yet these same studies are used to criticize the lower field 'NBTI' models. This study examines both high- and low-field degradation phenomena by monitoring the initial threshold voltage

Codes for the Identification of Federal and Federally-Assisted Organization

April 25, 2008
Author(s)
William C. Barker, Hildegard Ferraiolo
The Homeland Security Presidential Directive HSPD-12 called for new standards to be adopted governing the interoperable use of identity credentials to allow physical and logical access to Federal government locations and systems. The Personal Identity

Progress in Developing Dietary Supplement Databases: Analytically Validated Dietary Supplement Ingredient Database (DSID) and Dietary Supplement Label Database (DSLD) at NIH s Office of Dietary Supplements

April 24, 2008
Author(s)
J T. Dwyer, Mary F. Picciano, J. M. Betz, Kenneth D. Fisher, L G. Saldanha, Elizabeth A. Yetley, Paul M. Coates, John A. Milner, Jackie Whitted, Vicki Burt, K Radimer, Jaimie Wilger, Katherine E. Sharpless, Joanne M. Holden, K W. Andrews, Janet M. Roseland, Cuiwei Zhao, Amy Schweitzer, J Harnly, W Wolf, C R. Perry
Although an estimated 50% of US adults consume dietary supplements, analytically substantiated data on their bioactive constituents are sparse. Several programs funded by the Office of Dietary Supplements (ODS) at the National Institutes of Health enhance

USDA Dietary Supplement Ingredient Database (DSID): Preliminary Research Studies Address Basic Questions for Adult Multivitamin/Minerals

April 24, 2008
Author(s)
Janet M. Roseland, Joanne M. Holden, K W. Andrews, Cuiwei Zhao, Amy Schweitzer, J Harnly, W R. Wolf, C R. Perry, J T. Dwyer, Mary F. Picciano, J. M. Betz, L G. Saldanha, Elizabeth A. Yetley, Kenneth D. Fisher, Katherine E. Sharpless
The Nutrient Data Laboratory, USDA, is collaborating with the Office of Dietary Supplements (ODS), the National Center for Health Statistics, and other government agencies to design and populate a Dietary Supplement Ingredient Database (DSID). This

A Comparison of Cs Fountain Primary Frequency Standards

April 23, 2008
Author(s)
Thomas E. Parker
There are currently 9 cesium fountain primary frequency standards reporting calibrations of TAI to the Bureau International des Poids et Measures (BIPM). An investigation has been carried out using data from the BIPM publication Circular T to evaluate the
Displaying 31051 - 31075 of 73830
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