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Displaying 34176 - 34200 of 73832

Methods to Characterize Ricin for the Development of Reference Materials

July 1, 2006
Author(s)
Sung Kim, Diane K. Hancock, Lili Wang, Kenneth D. Cole, Prasad T. Reddy
Ricin is an abundant protein from the castor bean plant Ricinus communis. Because of its high toxicity and the simplicity of producing mass quantities, ricin is considered a biological terrorism agent. We have characterized ricin extensively with a view to

Modeling and Simulation of Nanometer Scale Copper Resistivity

July 1, 2006
Author(s)
Emre Yarimbiyik, Harry A. Scahfft, Richard A. Allen, Mona E. Zaghloul
A highly flexible simulation program to calculate the resistivity of thin films and lines with various line widths has been developed. The program takes into account the effect of surface and grain boundary scatterings, as well as temperature, on

Multi-path Multi-Channel Routing Protocol

July 1, 2006
Author(s)
Bo Yan, Hamid Gharavi
In this paper we present a DSR-based multi-path Routing protocol, which has been developed for transmission of Multiple Description Coded (MDC) packets in wireless ad-hoc network environments. The protocol is designed to eliminate co-channel interference

NCMC Workshop ReportNCMC-9: Combinatorial Methods for Nanostructured Materials

July 1, 2006
Author(s)
Michael J. Fasolka, Carol E. Laumeier
NCMC-9: Combinatorial Methods for Nanostructured Materials was a forum to examine the application and development of nanostructured materials by industry, with a focus on polymeric products, such as films, coatings and paints, adhesives, and personal care

New reference standards and artifacts for nanoscale physical property characterization

July 1, 2006
Author(s)
Jon R. Pratt, John A. Kramar, Gordon Shaw, Richard Gates, Paul Rice, John M. Moreland
This paper provides an overview of calibration artifacts being developed at the National Institute of Standards and Technology (NIST) that are intended to aid the accurate determination of nanoscale physical properties across a broad range of applications

NIST Sampling System for Accurate Ac Waveform Parameter Measurements

July 1, 2006
Author(s)
David I. Bergman
This paper summarizes efforts at the National Institute of Standards and Technology to develop a waveform sampling and digitizing system with accuracy comparable to that of an ac-dc thermal transfer standard for ac voltage measurements over the frequency

Performance of a C 60 + Ion Source on a Dynamic SIMS Instrument

July 1, 2006
Author(s)
Albert J. Fahey, John G. Gillen, P Chi, Christine M. Mahoney
An IonOptika [1] C60+ ion source has been fitted onto a CAMECA [1] ims-4f. Stable ion beams of C60+ and C602+ have been obtained with typical currents approaching 20 nA under conditions that allow for several days of source operation. The beam has been

Proceedings of the Static Analysis Summit

July 1, 2006
Author(s)
Paul E. Black, Helen Gill, W. E. Martin, Elizabeth N. Fong
This is the proceeding of a summit held in June 2006 at the National Institute of Standards and Technology (NIST). This Static Analysis Summit is one of a series of meetings in the NIST Software Assurance Measurement and Tool Evaluation (SAMATE) project

Recovering Circles and Spheres from Point Data

July 1, 2006
Author(s)
Christoph J. Witzgall, Geraldine Cheok, Anthony J. Kearsley
Methods for fitting circles and spheres to point sets are discussed. LADAR (LAser Detection And Ranging) scanners, in particular, are capable of generating "point clouds" containing the x, y, z coordinates of up to several millions of points reflecting the

SIMS Depth Profiling of Polymer Blends With Protein Based Drugs

July 1, 2006
Author(s)
Christine M. Mahoney, J Yu, Albert J. Fahey, J Gardella
The use of SF5+ cluster ions for depth profiling has been successful for polymer-drug mixtures and polymer blends. This study reports results of the surface and in-depth characterization of two component blend films of poly(L-lactic acid) (PLLA) and

The Film Boiling Reactor: A New Environment for Chemical Processing

July 1, 2006
Author(s)
Bryan J. Urban, Charles T. Avedisian, Wing Tsang
A new platform, based on film boiling, is described for chemical processing by catalytic decomposition of organic liquids. A model for conversion of pure methanol to hydrogen and carbon monoxide is used to illustrate the operational and performance

The Seventh Intercomparison of Josephson Voltage Standards in North America

July 1, 2006
Author(s)
Yi-hua D. Tang, Clark A. Hamilton, David Deaver, Harold Parks, Barry Wood
The 7th Interlaboratory comparison (ILC) of Josephson Voltage Standards (JVS) at 10 V is sponsored by the National Conference of Standard Laboratories International (NCSLI) and took place from April to October 2005 with 15 participating labs. NIST's

Time Signal Stations

July 1, 2006
Author(s)
Michael A. Lombardi
A review article that looks at the history of time signal stations, beginning with the first radio experiments in the 1890's and continuing to the present day. It discusses both shortwave time signal stations, best known for their voice announcements of

Transition From Direct Tunneling to Field Emission in Metal-Molecule-Metal Junctions

July 1, 2006
Author(s)
J M. Beebe, BongSoo Kim, John William Gadzuk, C D. Frisbie, James G. Kushmerick
Current-voltage measurements of metal-molecule-metal tunnel junctions formed from p-conjugated thiols exhibit an inflection point on a plot of ln(I/V2) against 1/V, consistent with a transition in tunneling barrier shape from trapezoidal to triangular. The

A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing

June 30, 2006
Author(s)
Signe Seidelin, J Chiaverini, Rainer Reichle, John J. Bollinger, Dietrich G. Leibfried, Joseph W. Britton, Janus Wesenberg, Brad R. Blakestad, John D. Jost, David Hume, C. Langer, R Ozeri, Nobuyasu Shiga, David J. Wineland
We demonstrate confinement of individual atomic ions in an RF Paul trap with novel geometry where the electrodes are located in a single plane and the ions confined above this plane. This device is realized with a simple fabrication procedure and has

A Microfabricated Surface-Electrode Ion Trap for Scalable Quantum Information Processing

June 30, 2006
Author(s)
Signe Seidelin, J Chiaverini, Rainer Reichle, John J. Bollinger, Dietrich G. Leibfried, Joseph W. Britton, Janus Wesenberg, Brad R. Blakestad, John D. Jost, David Hume, C. Langer, R Ozeri, Nobuyasu Shiga, David J. Wineland
We demonstrate confinement of individual atomic ions in an RF Paul trap with novel geometry where the electrodes are located in a single plane and the ions confined above this plane. This device is realized with a simple fabrication procedure and has
Displaying 34176 - 34200 of 73832
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