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Displaying 30926 - 30950 of 73697

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

The SIM Network: Improved Time Coordination for North, Central, and South America

April 23, 2008
Author(s)
Jose M. Lopez, Michael A. Lombardi, Andrew Novick, Jean-Simon Boulanger, R. de Carvalho, R. Solis, Francisco Jimenez
The Sistema Interamericano de Metrologia (SIM) consists of national metrology institutes (NMIs) located in the 34 member nations of the Organization of American States (OAS), which extends throughout North, Central, and South America, and the Caribbean

Fast-responding nonlinear phase shifter using a signal-wave gain medium

April 22, 2008
Author(s)
Lu Deng, Edward W. Hagley, Kaijun Jiang, Marvin G. Payne
Using a full density matrix formalism we show that for a lifetime broadened four-level scheme with a signal wave gain medium a large nonlinear phase shift can be induced without signal wave slowdown and attenuation. In this system the signal wave acquires

Fundamental Constants and Tests of Theory in Rydberg States of Hydrogen-like Ions

April 22, 2008
Author(s)
Ulrich D. Jentschura, Peter Mohr, Joseph N. Tan, B. J. Wundt
A comparison of precision frequency measurements to quantum electrodynamics (QED) predictions for Rydberg states of hydrogen-like ions can yield information on values of fundamental constants and test theory. With the results of a calculation of a key QED

Microstructure of oligofluorene asymmetric derivatives in organic thin film transistors

April 22, 2008
Author(s)
Quan Yuan, Stefan C. Mannsfeld, Ming L. Tang, Mark Roberts, Michael F. Toney, Dean DeLongchamp, Zhenan Bao
In organic thin film transistors (OTFT), modifying the molecular chemical structure affects the molecular packing and thin film morphology, which both sensitively influence the charge carrier mobility. A detailed understanding of the interplay of molecular
Displaying 30926 - 30950 of 73697
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