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NIST Authors in Bold

Displaying 35976 - 36000 of 74178

Practical High-Resolution Programmable Josephson Voltage Standards using Double- and Triple-Stacked MoSi 2 -Barrier Junctions

June 1, 2005
Author(s)
Yonuk Chong, Charles J. Burroughs, Paul Dresselhaus, Nicolas Hadacek, Hirotake Yamamori, Samuel Benz
We have developed vertically stacked superconductor-normal metal- superconductor Josephson junction technology for the next generation quantum voltage standards. Stacked junctions provide a practical way of increasing the output voltage and operating

Preparation of Homogeneously Dispersed Trialkyl Imidazolium Compatibilized Multi Walled Carbon Nanotube/Polystyrene Nanocomposites via Melt Extrusion

June 1, 2005
Author(s)
S Bellayer, Jeffrey W. Gilman, Naomi Eidelman, S Bourbigot, X Flambard, D M. Fox, Hugh C. De Long, Paul C. Trulove
Trialkylimidazolium-tetrafluoroborate, (IM) compatibilized, multiwalled carbon nanotubes (MWNT) were used to prepare well dispersed polystyrene (PS) IM-MWNT nanocomposites via melt extrusion. Quantitative TEM image analysis revealed superior dispersion of

Proximity Beacons and Mobile Device Authentication: an Overview and Implementation

June 1, 2005
Author(s)
Wayne Jansen, Serban I. Gavrila, Vladimir Korolev
The use of mobile handheld devices within the workplace is expanding rapidly. These devices are no longer viewed as coveted gadgets for early technology adopters, but have instead become indispensable tools that offer competitive business advantages for

RFID 101

June 1, 2005
Author(s)
Leonard E. Miller
We have implemented a quantum key distribution (QKD) system with polarization encoding at 850 nm over 1 km of optical fiber. The high-speed management of the bit-stream, generation of random numbers and processing of the sifting algorithm are all handled

Scalable Register Initialization for Quantum Computing in a Optical Lattice

June 1, 2005
Author(s)
G K. Brennen, G Pupillo, A M. Rey, Charles W. Clark, Carl J. Williams
The Mott insulator state created by loading an atomic Bose-Einstein condensate (BEC) into an optical lattice may be used as a means to prepare a register of atomic qubits in an quantum computer. Such architecture requires a lattice commensurately filled

Software Assurances Metrics and Tool Evaluation

June 1, 2005
Author(s)
Paul E. Black
NIST is starting two ambitious projects to (1) develop a taxonomy of software security flaws and vulnerabilities, (2) develop a taxonomy of software assurance (SA) functions and techniques which detect those flaws, (3) perform and maintain a survey of SA

Stacked Niobium-MoSi 2 -Niobium Josephson Junctions for AC Voltage Standards

June 1, 2005
Author(s)
Paul Dresselhaus, Yonuk Chong, Samuel Benz
Superconductor-normal metal-superconductor (SNS) Josephson junctions have proven to be a critical technology for voltage standards. NIST has used SNS junctions for both programmable DC and AC voltage standards. Previous devices have primarily used PdAu as

Stresses in Ion Exchange Layers of Soda-Lime-Silicate Glass

June 1, 2005
Author(s)
Theo Fett, J -. Guin, Sheldon M. Wiederhorn
This paper presents a new method to determine both the magnitude and the sign of the surface stresses that develop as a consequence of sodium/hydrogen ion exchange in soda-lime-silicate glass immersed in water. At 90 degrees C very thin layers that develop

SysML and UML 2 Support for Activity Modeling

June 1, 2005
Author(s)
Conrad E. Bock
This article describes activity modeling as specified by the Systems Modeling Language (SysML) and the finalization of the Unified Modeling Language version 2 (UML 2). It reviews and updates an earlier proposed alignment between Enhanced Functional Flow

Thermal Imaging Research Needs for First Responders: Workshop Proceedings

June 1, 2005
Author(s)
Francine K. Amon, Nelson P. Bryner, Anthony P. Hamins
This workshop provided a forum to discuss the strategies, technologies, procedures, best practices, research and development that can significantly improve thermal imaging technology. The goal of the workshop was to identify barriers that impede advances

Tuning of Tungsten Thin Film Superconducting Transition Temperature for Fabrication of Photon Number Resolving Detectors

June 1, 2005
Author(s)
Adriana Lita, Danna Rosenberg, Sae Woo Nam, Aaron J. Miller, Davor Balzar, L. M. Kaatz, R. E. Schwall
Tungsten thin films can form in one of two crystal structures: alpha (bcc), with a superconducting transition temperature (T c) of 15 mK, and beta (A15), with a T c between 1 and 4 K. Films with intermediate T cs are composed of both alpha and beta phases

Unexpected Effect of Field Angle in Magnetoresistance Measurements of High-Purity Nb

June 1, 2005
Author(s)
Loren F. Goodrich, Theodore C. Stauffer, Jolene Splett, Dominic F. Vecchia
We report on unexpected field-angle dependence of the magnetoresistance measurements of commercial, high-purity Nb discovered during our study of residual resistivity ratio ( RRR) measurements. The ( RRR) value indicates the purity and the low-temperature
Displaying 35976 - 36000 of 74178