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Displaying 41101 - 41125 of 73970

Stacked SNS Josephson Junction Arrays for Quantum Voltage Standards

June 1, 2003
Author(s)
Paul Dresselhaus, Yonuk Chong, J. Plantenberg, Samuel Benz
NIST is using and developing superconductor-normal metal-superconductor (SNS) Josephson arrays for both programmable DC and AC voltage standards. Increasing the output voltage is difficult because the output voltage per junction is small; hence series

Stray-Light Correction of the Marine Optical Buoy

June 1, 2003
Author(s)
Steven W. Brown, Bettye C. Johnson, S Flora, M Feinholz, M Yarbrough, R Barnes, Y S. Kim, Keith R. Lykke, D K. Clark
In ocean-color remote sensing, approximately 90% of the flux at the sensor originates from atmospheric scattering, with the water-leaving radiance contribution the remaining 10 % of the total flux. Consequently, errors in the measured top-of-the atmosphere

Sub-Nanometer Wavelength Metrology of Lithographically Prepared Structures: A Comparison of Neutron and X-Ray Scattering

June 1, 2003
Author(s)
Ronald L. Jones, T Hu, Eric K. Lin, Wen-Li Wu, D M. Casa, Ndubuisi George Orji, Theodore V. Vorburger, P J. Bolton, Z Barclay
The challenges facing current metrologies based on SEM, AFM, and light scatterometry for technology nodes of 157 nm imaging and beyond suggest that the development of new metrologies capable of routine measurement in this regime are required. We provide

Superconducting Multiplexers for Transition-Edge Sensors

June 1, 2003
Author(s)
Kent D. Irwin, James A. Beall, Joern Beyer, Steven Deiker, W.Bertrand (Randy) Doriese, S. L. Ferreira, Gene C. Hilton, Sae Woo Nam, Carl D. Reintsema, Joel Ullom, Leila R. Vale
Superconducting multiplexers make it possible to build arrays of thousands of low-temperature bolometers and microcalorimeters based on superconducting transition-edge sensors with a manageable number of readout channels. Our first generation SQUID

Surface Micromachining for Transition-Edge Detectors

June 1, 2003
Author(s)
Gene C. Hilton, James A. Beall, Steven Deiker, Joern Beyer, Leila R. Vale, Joel Ullom, Kent D. Irwin
We are developing arrays of high performance detectors based on superconducting transition-edge sensors (TES) for application in x-ray materials analysis as well as x-ray and sub-mm astronomy. In order to obtain the desired thermal time constants, as well

T c Suppression in Superconducting Films for use in Transition Edge Sensors

June 1, 2003
Author(s)
Steven Deiker, Gene C. Hilton, Kent D. Irwin, William Rippard, Steve Ruggiero, Leila R. Vale, B. A. Young
Transition edge sensor (TES) microcalorimeters have proved their value as photon detectors in several wavelength regimes. The central elecement of a TES is a superconducting film with a transition temperature designed to be at a specific temperature

Technical Requirements for Construction Materials Testing

June 1, 2003
Author(s)
Mary J. DiBernardo
This document describes accreditation requirements for laboratories operating in the Construction Materials Testing (CMT) field. It was prepared by the Construction Materials Testing Sub-Committee of the NACLA Association for Laboratory Accreditation

Test Environment and Procedures for Testing SafeBack 2.18

June 1, 2003
Author(s)
James R. Lyle
This document describes the testing of SafeBack 1.18. The Test cases that were applied are described in Disk Imaging Tool Specification, Version 1.1.6.The tests were run on test systems in the Computer Forensics Tool Testing Lab at the National Institute

The Common Industry Format: A Way for Vendors and Customers to Talk About Software Usability

June 1, 2003
Author(s)
Jean C. Scholtz, Emile L. Morse, Sharon J. Laskowski, A Wichansky, K Butler, K Sullivan
One way to encourage software developers to integrate usability engineering into their development process is for purchasers to require evidence of product usability. Until recently this presented a difficulty because usability and ¿user friendly software¿

Thermal and Flammability Properties of a Silica-PMMA Nanocomposite

June 1, 2003
Author(s)
Takashi Kashiwagi, A B. Morgan, Joseph M. Antonucci, Mark R. VanLandingham, Richard H. Harris Jr., W H. Awad, John R. Shields
PMMA, poly(metheylmethacrylate), nanocomposites were made by in situ radical polymerization of MMA, methylmethacrylate, with colloidal silica (ca. 12 nm) to study the effects of nanoscale silica particles on the physical properties and flammability

Tolerance Synthesis Scheme

June 1, 2003
Author(s)
Utpal Roy, N Pramanik, Sudarsan Rachuri, Ram D. Sriram, Kevin W. Lyons
The objective of this report is to identify representations and issues for the generic assembly information model and its use in a proactive tolerance synthesis scheme. It is proposed to use the small displacement torsors (the screw parameters) as a

Towards Modeling the Evolution of Product Families

June 1, 2003
Author(s)
Fujun Wang, Steven J. Fenves, Sudarsan Rachuri, Ram D. Sriram
A strategy successfully used by manufacturing companies is to develop product families so as to offer a variety of products with reduced development costs. This paper introduces our initial research on the representation of the evolution of product

Transverse Compressive Stress Effect in Y-Ba-Cu-O Coatings on Biaxially Textured Ni and Ni-5at.%W Substrates

June 1, 2003
Author(s)
Najib Cheggour, John (Jack) W. Ekin, Cameron C. Clickner, D. T. Verebelyi, C. L. H. Thieme, Ron Feenstra, P Goyal, D F. Paranthaman
Electromechanical properties of yttrium-barium-copper-oxide (YBCO) coatings on both pure Ni and Ni-5at.%W alloy rolling-assisted, biaxially-textured substrates (RABiTS) were investigated. The effect of transverse compressive stress on transport critical

Tungsten Transition-Edge Sensors for IR/Optical/UV Photon Counting

June 1, 2003
Author(s)
Aaron J. Miller, Sae Woo Nam, John M. Martinis, Alexander V. Sergienko
Tungsten transition-edge sensors have been demonstrated to have impressive photon-counting capabilities. Of particular interest is the expected impact to the applications of low-flux astronomy and photonic quantum information. The combination of high

Tunnel-Coupled Quantum Dots: Atomistic Theory of Quantum Dot Molecules and Arrays

June 1, 2003
Author(s)
Garnett W. Bryant, Javier Aizpurua, W Jaskolski, M Zielinski
An understanding of how dots couple in quantum dot molecules and arrays is needed so that the possibilities for tailored nanooptics in these systems can be explored. The properties of tunnel-coupled dots will be determined by how the dots couple through
Displaying 41101 - 41125 of 73970
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