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Displaying 32126 - 32150 of 74303

A new model of pulse oximetry: Two-dimensional pulsation

March 14, 2007
Author(s)
Shao Yang, Paul B. Batchelder, Dena M. Raley
We developed a two-dimensional pulsation model of pulse oximetry. Instead of a one-dimensional single layer as in the conventional theory, the arteries pulsate in two dimensions taking into account the effect of probing light that does not pass through the

Absolute frequency measurement of the neutral 40 Ca optical frequency standard at 657 nm based on microkelvin atoms

March 14, 2007
Author(s)
G Wilpers, Christopher W. Oates, Scott A. Diddams, A Bartels, Tara M. Fortier, Windell Oskay, James C. Bergquist, Steven R. Jefferts, Thomas P. Heavner, Thomas E. Parker, Leo W. Hollberg
We report an absolute frequency measurement of the optical clock transition at 657 nm in 40Ca with a relative uncertainty of 7.5x10 -15, the most accurate frequency measurement of a neutral atom optical transition to date. Relative instabilities of 2x10

Properties of a 50/50 Mixture of Jet-A + S-8

March 14, 2007
Author(s)
Thomas J. Bruno, Arno D. Laesecke, Stephanie L. Outcalt, Hans-Dieter Seelig, Beverly L. Smith
This report describes measurement efforts performed on the mixture of aviation fuels: Jet-A + S-8*. The primary mixture is a 50/50 (vol/vol) combination of the two fuels. Measurements include chemical analysis, density, viscosity, speed of sound and vapor

Reliability and Characterization Challenges for Nano-Scale Electronic Devices

March 14, 2007
Author(s)
John S. Suehle, Hao Xiong, Moshe Gurfinkel
Scaling electronic devices to nano-scale dimensions may introduce unforeseen physical mechanisms that may seriously compromise device reliability. It has been discussed that as individual atoms comprise a larger fraction of the actual device area, defects

Segmentation and Classification of Human Forms Using LADAR Data

March 14, 2007
Author(s)
James S. Albus, Tsai Hong Hong, Tommy Chang
High resolution LADAR images of scenes containing human forms have been segmented and algorithms developed for recognizing human forms in various positions in both cluttered and uncluttered scenes. Registration of LADAR and color CCD images enhance the

Sensor Location through Linear Programming with Arrival Angle Constraints

March 14, 2007
Author(s)
Camillo Gentile, J Shiu
In previous work, we established a linear programming framework to determine sensor location from measured link distances between neighboring nodes in a network. Besides providing greater accuracy compared to other techniques, linear programs in particular

Chip scale atomic devices

March 13, 2007
Author(s)
Svenja A. Knappe, P Schwindt, Vladislav Gerginov, V Shah, Alan Brannon, Brad Lindseth, Li-Anne Liew, Hugh Robinson, John Moreland, Z Popovic, Leo W. Hollberg, John E. Kitching
We give an overview over our research on chip-scale atomic devices. By miniaturizing optical setups based on precision spectroscopy, we develop small atomic sensors and atomic references such as atomic clocks, atomic magnetometers, and optical wavelength

Estimating Common Vector Parameters in Interlaboratory Studies

March 13, 2007
Author(s)
Andrew L. Rukhin
The primary goal of this work is to extend two methodsof random effects models to multiparameter situation. These methods comprise the DerSimonian-Laird estimator, arising in the meta-analysis, and the Mandel-Paule algorithm widely used in interlaboratory

Numerical Path-Integration Technique for the Calculation of Transport Properties

March 13, 2007
Author(s)
E Kang, M Mansfield, Jack F. Douglas
We present a new technique for the computation of both the translational diffusivity and the intrinsic viscosity of macromolecules, and apply it here to approximately 1000 different protein structures. The computed translational diffusivities and intrinsic

Usability Testing of Ten-Print Fingerprint Capture

March 13, 2007
Author(s)
Mary Theofanos, Brian Stanton, Shahram Orandi, Ross J. Micheals, Nien F. Zhang
The Department of Homeland Security (DHS) and the United States Visitor and Immigrant Status Indicator Technology (US-VISIT) program are migrating from a two print capture process (left and right index fingers) to a ten-print slap fingerprint capture

An Athena Validation Pilot Showcase for Automotive Industry

March 12, 2007
Author(s)
Nenad Ivezic, Pat Snack
The Automotive Industry Action Group- (AIAG) led consortium, formed to execute an ATHENA project validation pilot, demonstrated initial results at the AIAG Enterprise Interoperability Showcase on November 15 in Detroit, Michigan. As the basis of the ATHENA

On-Chip Characterization of Molecular Electronic Devices using CMOS: The Design and Simulation of a Hybrid Circuit Based on Experimental Molecular Electronic Device Results

March 11, 2007
Author(s)
Nadine Gergel-Hackett, Garrett S. Rose, Pater Paliwoda, Christina Hacker, Curt A. Richter
The focus of the field of molecular electronics in recent years has been mostly limited to the development of molecular electronic test devices and the characterization of electron transport through organic molecules. However, in order for molecular

Annual Report of the National Earthquake Hazards Reduction Program (NEHRP)

March 7, 2007
Author(s)
John(Jack) R. Hayes Jr., Edward Laatsch, Joy Pauschke, David Applegate, John Filson
This annual report is submitted by the interagency Coordinating Committee (ICC) of NEHRP in compliance with Public Law 108-360. As specified in the legislation, this report provides proposed budgets for Fiscal Year (FY) 2007 and 2008 and describes program

Controlling Diffusion and Exchange in Layer-by-Layer Assemblies

March 6, 2007
Author(s)
Nicole Zacharia, Dean DeLongchamp, Miguel Modestino, P T. Hammond
Here we present a layer-by-layer (LbL) assembled device architecture that serves as a model heterostructure to study the atypical assembly that can result from the bottom-up combination of multiple multilayers of different compositions. Heterostructure

Intermolecular potential and second virial coefficient of the water-nitrogen complex

March 6, 2007
Author(s)
Allan H. Harvey, Akyl S. Tulegenov, Richard J. Wheatley, Matthew P. Hodges
We construct a rigid-body (five-dimensional) potential-energy surface for the water-nitrogen complex using the systematic intermolecular potential extrapolation routine (SIMPER). The intermolecular potential is then extrapolated to the limit of a complete
Displaying 32126 - 32150 of 74303