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NIST Authors in Bold

Displaying 34826 - 34850 of 74229

Anisotropic elastic properties of nanocrystalline nickel thin films

May 1, 2006
Author(s)
Donna C. Hurley, Roy H. Geiss, N Jennett, Malgorzata Kopycinska-Mueller, A Maxwell, Jens Mueller, David T. Read, J Wright
As length scales continue to shrink, new tools are needed to measure mechanical properties. We are developing two such tools using different nondestructive acoustical techniques. Surface acoustic wave spectroscopy (SAWS) uses laser-ultrasonic methods to

Automatically Testing Interacting Software Components

May 1, 2006
Author(s)
Leonard J. Gallagher, Jeff Offutt
One goal of integration testing for object-oriented software is to ensure high object interoperability. Sent messages should have the intended effects on the states and subsequent actions of the receiving objects. This is especially difficult when software

Chemical and Physical Characterization of Poly(p-phenylene benzobisoxazole) Fibers Used in Body Armor

May 1, 2006
Author(s)
Joannie W. Chin, E Byrd, Amanda L. Forster, Xiaohong Gu, Tinh Nguyen, Kirk D. Rice, Walter J. Rossiter Jr, S J. Scierka, John R. Sieber, Paul E. Stutzman, Li Piin Sung
Problems with the performance and durability of body armor based on poly(p-phenylene benzobisoxazole (PBO) fiber became apparent in the summer of 2003, when PBO-based body armor that was less than 8 months was penetrated by a bullet. Mechanical testing of

Control Based Mobile Ad-hoc Networks For Video Communications

May 1, 2006
Author(s)
Hamid Gharavi
This paper presents a feedback control scheme for transmission of video signals over mobile ad-hoc channels. The scheme is a combination of cross-layer (local) feedback and receiver feedback. The receiver feedback is based on the real time transport

Damping mechanisms for precision applications in UHV environment

May 1, 2006
Author(s)
Sumanth B. Chikkamaranahalli, R. R. Vallance, Bradley N. Damazo, Richard M. Silver
Surface analysis techniques such as scanning probe microscopy (SPM) have undergone significant advances and are attractive for application to electron and optical devices such as micro lenses, vacuum tubes, electron tubes, etc. For surface stability

Evaluating Reasoning Systems

May 1, 2006
Author(s)
Conrad Bock, Michael Gruninger, Donald E. Libes, Joshua Lubell, Eswaran Subrahmanian
A review of the literature on evaluating reasoning systems reveals that it is a very broad area with wide variation in depth and breadth of research on metrics and tests. Consolidation is hampered by nonstandard terminology, differing methodologies

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
Displaying 34826 - 34850 of 74229
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