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Displaying 34451 - 34475 of 73832

Evaluation of Aerodynamic Drag and Torque for External Tanks in Low Earth Orbit

May 1, 2006
Author(s)
William C. Stone, Christoph J. Witzgall
A numerical procedure is described in which the aerodynamic drag and torque in low Earth orbit are calculated for a prototype Space Shuttle external tank and its components, the "LO2" and "LH2" tanks, carrying liquid oxygen and hydrogen, respectively, for

Exchange Coupling in Magnetic Multilayers

May 1, 2006
Author(s)
Mark D. Stiles
In magnetic multilayers, the magnetizations of two ferromagnetic layers separated by a non-magnetic spacer layer are coupled by the electrons in the spacer layer. This coupling oscillates in sign as a function of the thickness of the spacer layer

Excimer Laser Treatment of Carbon Nanotubes

May 1, 2006
Author(s)
Katie Hurst, Darryl A. Keenan, Anne Dillon, Thomas Gennett, Paul Rice, John H. Lehman
Raman spectroscopy and spectral responsivity measurements are performed to investigate the alteration of sample purity and morphology, caused by varying pulse parameters for laser treatment of bulk carbon nanotubes using a 248 nm excimer-laser.

Manufacturing Interoperability

May 1, 2006
Author(s)
Steven R. Ray, Albert T. Jones
National Institute of Standards and Technology, Gaithersburg, MD 20899, USA ABSTRACT: As manufacturing and commerce become ever more global in nature, companies are increasingly dependent upon the efficient and effective exchange of information with their

Mutationism and the dual causation of evolutionary change

May 1, 2006
Author(s)
Arlin B. Stoltzfus
The rediscovery of Mendel's laws a century ago launched the science that William Bateson called "genetics," and led to a new view of evolution combining selection, particulate inheritance, and the newly characterized phenomenon of "mutation." This

Optimization of Sensor Locations for Spindle Condition Monitoring

May 1, 2006
Author(s)
Li Zhang, Robert Gao, Kang B. Lee
This paper presents an approach to optimizing the location of vibration sensors on a spindle, based on the concept of Effective Independence (EfI). The study is aimed at investigating the effect of sensor placement on spindle vibration measurement, and its

Performance of the GHRS Pt-Ne Hollow-Cathode Lamps After Their Return From Space and Comparison With Archival Data

May 1, 2006
Author(s)
F Kerber, D Lindler, P Bristow, Gillian Nave, Joseph Reader, Craig J. Sansonetti, D Lembke, S Heap, Michael R. Rosa, H J. Wood
The Space Telescope European Co-ordinating Facility (ST-ECF) and the National Institute of Standards and Technology (NIST) are collaborating to study hollow cathode calibration lamps as used onboard the Hubble Space Telescope (HST). As part of the STIS

Phase-Stabilized Ultrafast Lasers Signal New Era Measurement and Research

May 1, 2006
Author(s)
Tara M. Fortier, A Bartels, Scott A. Diddams
The development of short pulsed lasers has progressed steadily over the past 30 years. In the search for better techniques and materials to generate shorter and shorter pulses, the 1990's witnessed the arrival of Kerr-lens mode locked Ti:sapphire lasers as

Probing the Interfacial Adhesion Strength in Compositional Libraries of Epoxy Films

May 1, 2006
Author(s)
Christopher Stafford, J Y. Kim, D Kawaguchi, Gareth Royston, Martin Chiang
We are developing a measurement platform, based on the edge lift-off test geometry, geared towards combinatorial and high-throughput (C&HT) assessment of interfacial reliability in thermally cured epoxy materials. A critical parameter space to be explored

Radio Controlled Wristwatches

May 1, 2006
Author(s)
Michael A. Lombardi
A review article that briefly summarizes the various types of radio controlled wristwatches and the technology behind them. It includes a short description of NIST radio station WWVB, and other signal sources used to synchronize radio controlled

Recent experiments in trapped-ion quantum information processing at NIST

May 1, 2006
Author(s)
J Chiaverini, Murray D. Barrett, Brad R. Blakestad, Joseph W. Britton, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, Dietrich G. Leibfried, R Ozeri, Tobias Schaetz, David J. Wineland
Atomic ions confined in segmented trap arrays provide a system for quantum information processing. We report on the execution of two simple quantum algorithms, quantum error correction and the quantum Fourier transform, using this implementation. The

Recent experiments in trapped-ion quantum information processing at NIST

May 1, 2006
Author(s)
J Chiaverini, Matthew P. Barrett, Brad R. Blakestad, Joseph W. Britton, Wayne M. Itano, John D. Jost, Emanuel H. Knill, C. Langer, Dietrich G. Leibfried, R Ozeri, T Schaetz, David J. Wineland
Atomic ions confined in segmented trap arrays provide a system for quantum information processing. We report on the execution of two simple quantum algorithms, quantum error correction and the quantum Fourier transform, using this implementation. The

RM 8111: Development of a Prototype Linewidth Standard

May 1, 2006
Author(s)
Michael W. Cresswell, William Gutherie, R. Dixon, Richard A. Allen, Christine E. Murabito, Joaquin (. Martinez
Staff of the Semiconductor Electronics Division, the Information Technology Laboratory, and the Precision Engineering Laboratory at NIST, in collaboration with VLSI Standards, Inc., of San Jose, California, have developed a new generation of prototype
Displaying 34451 - 34475 of 73832
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