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Displaying 38301 - 38325 of 74067

XML Conformance Test Process Document

December 1, 2004
Author(s)
Sandra Martinez
The goal of this document is to help W3C editors write better specifications, by making a specification easier to interpret without ambiguity and clearer as to what is required in order to conform. It focuses on how to define and specify conformance. It

XML Schema Validation Process for CORE.GOV

December 1, 2004
Author(s)
KC Morris, Boonserm Kulvatunyou, Simon P. Frechette, Joshua Lubell, Puja Goyal
Many integration projects today rely on shared semantic models based on standards represented using Extensible Mark up Language (XML) technologies. Shared semantic models typically evolve and require maintenance. In addition, to promote interoperability

High Inversion Current in Silicon Nanowire Field Effect Transistors

November 30, 2004
Author(s)
Sang-Mo Koo, Jin-Ping Han, Eric M. Vogel, Curt A. Richter, J. Vahakangas, Akira Fujiwara
Silicon nanowire (SiNW) field effect transistors (FETs) with channel widths down to 20 nm have been fabricated by a conventional 'top-down?approach using electron-beam lithography. The SiNW device shows higher inversion channel current density than the

Radio-frequency and Analog/Mixed-signal Circuits and Devices for Wireless Communications

November 30, 2004
Author(s)
Herbert S. Bennett, Ralf Brederlow, Julio Costa, Margaret Huang, Anthony A. Immorlica, Jan-Erik Mueller, Marco Racanelli, Charles E. Weitzel, Bin Zhao
Wireless communications have evolved from the traditional radio and TV broadcasting to a broad spectrum of exciting applications in bi-directional and interactive wireless communications such as cellular system/phones, smart handheld devices, wireless

Matching Performance for the US-Visit IDENT System Using Flat Fingerprints

November 29, 2004
Author(s)
Charles L. Wilson, Michael D. Garris, Craig I. Watson
This report discusses the flat to flat matching performance of the US-VISIT fingerprint matching system. Both one-to-many matching used to detect duplicate visa enrollments and one-to-one matching used to verify the identity of the visa holder are

Mechanical Behavior of Electrodeposited Copper Film at Elevated Temperatures

November 19, 2004
Author(s)
David T. Read, Yi-Wen Cheng, Roy H. Geiss
The temperature dependence of the strength of a thin copper electrodeposit has been measured from room temperature to 150 °C by microtensile testing. The ultimate tensile strength decreased from around 240 MPa at room temperature to just above 200 MPa at

Properties of water and aqueous systems: Metrological applications

November 19, 2004
Author(s)
Daniel G. Friend, Allan H. Harvey
Water and aqueous systems are widely used in metrology, which is a major focus of the National Institute of Standards and Technology (NIST). Standards such as those produced by IAPWS can be used to calibrate instruments and validate protocols. In this work

Standards of time and frequency at the outset of the 21st century

November 19, 2004
Author(s)
Scott Diddams, James C. Bergquist, Steven R. Jefferts, Christopher W. Oates
In this paper we review state-of-the-art atomic time and frequency standards and discuss some of their uses in science and technology. After fifty years of development, microwave atomic clocks based on cesium have achieved fractional uncertainties below 1

Unusual Multilayered Structures in PEO/Laponite Nanocomposite Films

November 19, 2004
Author(s)
Avinash Dundigalla, Sheng Lin-Gibson, F Ferreiro, M M. Malwitz
The unusual structure of poly-ethylene-oxide and Laponite clay in transparentnanocomposite films was investigated using scanning electron, atomic force, optical microscopy, and X-ray scattering. Each method is sensitive to different aspects of structural

Competing Damage Modes in All-Ceramic Crowns: Fatigue and Lifetime

November 15, 2004
Author(s)
Yu Zhang, Brian R. Lawn
A study is made of fracture from cyclic loading of WC spheres on the surfaces of brittle layers on compliant substrates, as representative of repetitive occlusal contact on dental crowns. Several damage modes radial cracks at both top surface and

Time-division multiplexing of high-resolution TES X-ray microcalotimeters: Four pixels and beyond

November 15, 2004
Author(s)
W.Bertrand (Randy) Doriese, James A. Beall, Steven Deiker, William Duncan, S. L. Ferreira, Gene C. Hilton, Kent D. Irwin, Carl D. Reintsema, Joel Ullom, Leila R. Vale, Yizi Xu
We present experimental results from a four-pixel array of transition-edge-sensor, x-ray microcalorimeters read out through a single amplifier channel via a time-division superconducting quantum interference device multiplexer. We map the dependence of the

Boltzmann Test of Slonczewski's Theory of Spin Transfer Torque

November 12, 2004
Author(s)
J Xiao, A Zangwill, Mark D. Stiles
We use a matrix Boltzmann equation formalism to test the accuracy of Slonczewski's theory of spin-transfer torque in thin-film heterostructures where a non-magnetic spacer layer separates two non-collinear ferromagnetic layers connected to non-magnetic

Effect of Steel and Tungsten Carbide Ball Indenters on Rockwell Hardness Tests

November 11, 2004
Author(s)
Li Ma, Samuel R. Low III, J L. Fink
Rockwell hardness (HR) is a valuable and widely used indentation hardness test for evaluating mechanical properites of metallic materials. For the Rockwell scales that use a ball indenter, either a steel or tungsten carbide (WC) ball indenter is permitted

Monolayer Formation of PBLG-PEO Block Copolymers at the Air-Water Interface

November 11, 2004
Author(s)
Y Park, Y W. Choi, SK Park, C S. Cho, Michael J. Fasolka, Daeson Sohn
Physicochemical properties of PBLG (poly(gamma-benzyl-L-glutamate))-PEO (poly(ethylene oxide)) diblock copolymers composed of PBLG as the hydrophobic rod component and PEO as the hydrophilic component were investigated at the air-water interface. Surface

Permeability of Polymeric Scaffolds With Defined Pore Micro-Architecture and Interconnectivity Fabricated by Solid Free-Form Microprinting

November 7, 2004
Author(s)
K W. Lee, E Jabbari, L L. Lu, B L. Currier, Joy Dunkers, Martin Chiang, John A. Tesk, Marcus T. Cicerone, M J. Yaszemski
The hydraulic permeability of was measured as a function of interconnectivity of the pores. The hydraulic permeability of porous scaffolds for tissue engineering of bone was measured as interconnectivity of the pores was changed from 100 % to 70 %. The
Displaying 38301 - 38325 of 74067
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