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Displaying 31626 - 31650 of 73929

Ultraviolet Photoemission Spectra of Para-Phenylene-Ethynylene Thiols Chemisorbed on Gold

January 1, 2008
Author(s)
Christopher D. Zangmeister, Roger D. van Zee, Steven W. Robey, N E. Gruhn, Yuxing Yao, J M. Tour
Photoemission spectra of para-phenylene-ethynylene thiols chemisorbed on gold have been measured. Four compounds were studied: 4,4'-bis(phenylethynyl)-benzenethiol, 4 (phenylethynyl)benzenethiol, 4-ethynylbenzenethiol, and benzenethiol. The spectra were

Detection of Interstellar Cyanoformaldehyde (CNCHO)

December 31, 2007
Author(s)
Francis J. Lovas, Anthony J. Remijan, Jan M. Hollis, Wilmer D. Stork, Phil R. Jewell, D Meier
Cyanoformaldehyde (CNCHO) has been detected toward the star-forming region Sagittarius B2(N) with the 100 m Green Bank Telescope (GBT) by means of four P-branch rotational transitions in emission, the 7(0, 7) 6(1, 6) at 8.6GHz, the 8(0, 8) 7(1, 7) at 19.4

Developments in nano-oscillators based upon spin-transfer point-contact devices

December 31, 2007
Author(s)
Thomas J. Silva, William H. Rippard
We review the current status of research on microwave nano-oscillators that utilize spin transfer devices with point-contact geometry, with an emphasis on the open questions that still prevent our full understanding of device properties. In particular, we

Dynamically Programmable Digital Tissue Phantoms

December 31, 2007
Author(s)
Steven W. Brown, Joseph P. Rice, David W. Allen, Maritoni A. Litorja, Karel Zuzak, Edward Livingston
As optical imaging modalities gain acceptance for medical diagnostics and become common in clinical applications, standardized protocols to quantitatively assess optical sensor performance are required to ensure commonality in measurements and to validate

Integrating Learning Into a Hierarchical Vehicle Control System

December 31, 2007
Author(s)
James S. Albus, Roger V. Bostelman, Tsai H. Hong, Tommy Chang, William P. Shackleford, Michael O. Shneier
The National Institute of Standards and Technology s (NIST) Intelligent Systems Division (ISD) is a participant in the Defense Advanced Research Projects Agency (DARPA) LAGR (Learning Applied to Ground Robots) Program. The NIST team s objective for the

International Legal Metrology Organizational Primer

December 31, 2007
Author(s)
S. W. Stiefel
The world's metrology and legal metrology infrastructure abounds with organizations that play differing roles such as measurement research, standards, and accreditation. Associated with these organizations is a bewildering assortment of acronyms. This

Making Biometric Systems Usable Let's Not Forget the User

December 31, 2007
Author(s)
Mary F. Theofanos, Brian C. Stanton
The use of physical identifiable characteristics (biometrics) in border and transportation security has increased since 9/11. Currently, the United States Visitor and Immigrant Status Indicator Technology (US-VISIT) program collects a right and left index

Multi-Channel Mobile Ad-Hoc Links for Multimedia Communications

December 31, 2007
Author(s)
Hamid Gharavi
This paper is mainly concerned with multi-channel transmission of real-time information such as video over multi-hop ad-hoc links. We propose two multi-channel routing protocols. The first is based on single-path routing and aims at suppressing the intra

Multi-Probe Assembly

December 31, 2007
Author(s)
John Wason, William Gressick, J Wen, Jason J. Gorman, Nicholas Dagalakis
This paper describes the algorithm development and experimental results of a multi-probe micro-assembly system. The experimental testbed consists of two actuated probes, an actuated die stage, and vision feedback. The kinematics relationships for the

Multiscale modeling of point defects in strained silicon

December 31, 2007
Author(s)
Vinod Tewary, B. Yang
A multiscale Green's function method is described for modeling substitutional point defects and vacancies in strained silicon. The model seamlessly links the length scales from atomistic to macro. The model accounts for the discrete lattice effects
Displaying 31626 - 31650 of 73929
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