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Displaying 40551 - 40575 of 74099

Urethane Methacrylate Resin Based Amorphous Calcium Phosphate Composites

October 22, 2003
Author(s)
W F. Regnault, Drago Skrtic, Joseph M. Antonucci
This study investigates the mechanical and ion-release properties of potentially bioactive amorphous calcium phosphate composites derived from three types of urethane dimethacrylate resins. Both the biaxial flexure strength, especially after immersion in

IEEE Standard 802.16 for Global Broadband Wireless Access

October 21, 2003
Author(s)
Roger Marks
Global standardization is a key issue for the success of broadband wireless access systems. The IEEE 802.16 Working Group on Broadband Wireless Access, with hundreds of participants worldwide, has developed IEEE Standard 802.16, with its WirelessMAN air

Phase-Dependent RCS Measurements in the Presence of Outliers

October 19, 2003
Author(s)
Lorant A. Muth, Timothy Conn
Coherent radar cross section measurements on a target moving along the line-of-sight in free space will trace a circle centered on the origin of the complex (I,Q) plane. The presence of additional complex signals (for example, background, clutter, average

Uncertainty Analysis for Spherical Near-Field Measurement

October 19, 2003
Author(s)
Michael H. Francis, Ronald C. Wittmann
A general approach is introduced for estimating uncertainties in far-field paramenters from spherical near-field measurements. Although the analysis is incomplete at present, we expect that as the measurement radius increases, our results will transform

Uncertainty Analysis of RCS Calibrations at the Etcheron Valley Range

October 19, 2003
Author(s)
Lorant A. Muth, Dale M. Diamond, John Liles, James Adams
We have been developing the uncertainty analysis of RCS calibrations and measurements at the Etcheron Valley RCS outdoor ground-bounce facility in the 2-18 GHz range. In this study we report on the results of the uncertainty analysis primarily at 11.3 GHz

Highly Multiplexed Assays for Measuring Polymorphisms on the Y-Chromosome

October 17, 2003
Author(s)
John M. Butler, R Schoske, Peter Vallone
A multiplex PCR assay capable of amplifying 20 Y chromosome short tandem repeat (STR) markers simultaneously has been developed. These markers include all of the Y STRs that make up the extended haplotype used in Europe (DYS19, DYS385, DYS389I/II, DYS390

The 2002 Materials Research Society (MRS) Fall Meeting report

October 17, 2003
Author(s)
Winnie K. Wong-Ng
Following tradition, the 2002 Materials Research Society (MRS) annual meeting again took place from in Boston Copely Plaza from December 1 to 6 (in the spacious Hynes Convention Center). Attending the Boston MRS Fall meeting, for many attendees, has also

A Simulation Analysis of BACnet Local Area Networks

October 15, 2003
Author(s)
W Song, S Hong, Steven T. Bushby
Cnet is a standard data communication protocol for building automation and control systems. BACnet defines an object-base model of the information that is exchanged between components of the building automation system and an application layer protocol that

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
Displaying 40551 - 40575 of 74099
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