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Displaying 40426 - 40450 of 73960

Combinatorial Chemistry

October 13, 2003
Author(s)
J D. Hewes, Debra L. Kaiser, Alamgir Karim, Eric J. Amis
In 1995, the rapid fabrication of tens, hundreds, and, eventually, tens of thousands of samples in two-dimensional arrays of discrete microscaled samples (pixels) using lithography methods developed for the electronics industry was reported. Importantly

Guide to Information Technology Security Services

October 13, 2003
Author(s)
Timothy Grance, Joan Hash, Marc Stevens, K O'Neal, N Bartol
Organizations frequently must evaluate and select a variety of information technology (IT) security services in order to maintain and improve their overall IT security program and enterprise architecture. IT security services, which range from security

EMI Characterization with Parasitic Modeling for a Permanent Magnet Motor Drive

October 12, 2003
Author(s)
Xudong Huang, Pepa Elton, Jih-Sheng Lai, Allen R. Hefner Jr., David W. Berning, Shaotang Chen, Thomas Nehl
In this paper , a permanent magnet ac motor drive is tested extensively, and the prominent frequencies are identified for their relationship with the noise sources and their propagation paths. Switching characteristics of the power MOSFETs are evaluated

High Speed IGBT Module Transient Thermal Response Measurements for Model Validation

October 12, 2003
Author(s)
David W. Berning, John V. Reichl, Allen R. Hefner Jr., Mora Hernandez, Colleen E. Hood, Jih-Sheng Lai
A measurement system operates a multi-chip insulated gate bipolar transistor (IGBT) that is part of an integrated power electronic module (IPEM) in a high-pulsed-power linear mode for validation of dynamic thermal models. It is found that the gate-cathode

What is the Future for Technology Roadmaps on Optoelectronics Packaging

October 11, 2003
Author(s)
Herbert S. Bennett
Reasons for why you should become more involved with technology roadmaps for optoelectronics packaging are given. Unlike the silicon CMOS (complementary metal-oxide semiconductor) industry, the optoelectronics packaging industry does not have an

Guide to Information Technology Security Services

October 9, 2003
Author(s)
Timothy Grance, Joan Hash, Marc Stevens, Kristofor O'Neal, Nadya Bartol
Organizations frequently must evaluate and select a variety of information technology (IT) security services in order to maintain and improve their overall IT security program and enterprise architecture. IT security services, which range from security

Guide to Selecting Information Technology Security Products

October 9, 2003
Author(s)
Timothy Grance, Marc Stevens, Marissa Myers
The selection of IT security products is an integral part of the design, development and maintenance of an IT security infrastructure that ensures confidentiality, integrity, and availability of mission critical information. The guide seeks to assist in

Facility for Pulsed Extreme Ultraviolet Detector Calibration

October 8, 2003
Author(s)
Steven E. Grantham, Robert E. Vest, Charles S. Tarrio, Thomas B. Lucatorto
All of the Extreme Ultraviolet light sources currently under consideration for Extreme Ultraviolet lithography are based on plasmas that emit radiation with a wavelength of approximately 13.4 nm. These sources whether they are produced by a discharge or

RF and IF mixer optimum matching impedances extracted by large-signal vectorial measurements

October 7, 2003
Author(s)
Alessandro Cidronali, Giovanni Loglio, Jeffrey Jargon, Kate Remley, I. Magrini, Donald C. DeGroot, Dominique Schreurs, Kuldip Gupta, Gianfranco Manes
This paper introduces a new technique that allows us to measure the admittance conversion matrix of a two-port device, using a Nonlinear Vector Network Analyzer. This method is applied to extract the conversion matrix of a 0.2 micron pHEMT, driven by a 4.8

RF Behavioural Modelling from Multisine Measurements: Influence of Excitation Type

October 7, 2003
Author(s)
Dominique Schreurs, M. Myslinski, Catherine A. Remley
Behavioural models for RF devices are typically based on large-signal RF measurements. Until now, those measurements were usually limited to single-tone excitations. In this work, we focus on the use of multisines in the experiment design, and, more

Real-Space Imaging of Structural Transitions in the Vortex Lattice of V 3 Si

October 6, 2003
Author(s)
C Sosolik, Joseph A. Stroscio, Mark D. Stiles, E Hudson, Steven R. Blankenship, Aaron P. Fein, Robert Celotta
The predictions of nonlocal London theory are confirmed by real-space measurements of the hexagonal to nearly square transition in the vortex lattice structure of V 3Si. We observe that the lattice transforms from hexagonal to nearly square over the field

Scattering by Slightly Non-Spherical Particles on Surfaces

October 6, 2003
Author(s)
Thomas A. Germer
We investigate the shape dependence of the scattering by dielectric and metallic particles on surfaces by considering particles whose free-space scattering properties are nearly identical. The scattering by metallic particles is fund to be strongly

The Role of Carrier Lifetime in Forward Bias Degradation of 4H-SiC PiN Diodes

October 5, 2003
Author(s)
Allen R. Hefner Jr., Ty R. McNutt, David W. Berning, Ranbir Singh, Adwoa Akuffo
Abstract. The role of excess carrier lifetime reduction in the mechanism for on-state voltage (Vf) degradation of high voltage 4H-SiC PiN diodes is investigated. A method is developed to electrically monitor the emitter, base, and end region excess carrier

An All-Fiber, Phase-Locked Supercontinuum Source for Frequency Metrology

October 2, 2003
Author(s)
Brian Washburn, Jeffrey W. Nicholson, M. Yan, C. G. Jorgensen, Scott Diddams, Nathan R. Newbury
A phase-locked IR frequency comb is produced by an all-fiber supercontinuum source based on an amplified mode-locked Erbium fiber laser and highly nonlinear, dispersion-shifted fiber. Stabilization of the carrier envelope offset frequency and repetition
Displaying 40426 - 40450 of 73960
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