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Displaying 32826 - 32850 of 73929

High Carrier Mobility Polythiophene Thin Films: Structure Determination by Experiment and Theory

March 19, 2007
Author(s)
Dean M. DeLongchamp, Regis J. Kline, Eric K. Lin, Daniel A. Fischer, Lee J. Richter, Leah A. Lucas, Martin Heeney, Iain McCulloch, John E. Northrup
We exploit the unprecedented crystallinity of poly(2,5-bis(3-alkylthiophene-2-yl)thieno[3,2-b]thiophenes) (pBTTTs) high performance semiconducting polymers to study structural detail within 25 nm thick films of a pBTTT with tetradecyl side chains (pBTTT

Mid-Infrared Imaging With a Solid Immersion Lens and Broadband Laser Source

March 19, 2007
Author(s)
Chris A. Michaels
An approach to increasing the spatial resolution attainable with infrared (IR) microscopy involves the application of hemispherical solid immersion lenses (SIL). The hemispherical SIL lens can produces image formation free of geometric aberration, wherein

Estimation of Kov ts Retention Indices Using Group Contributions

March 17, 2007
Author(s)
Stephen E. Stein, Valeri I. Babushok, Robert L. Brown, Peter J. Linstrom
We have constructed a group contribution method for estimating Kov ts retention indices by using observed data from a set of diverse organic compounds. Our database contains observed retention indices for over 35,000 different molecules. These were

Asymmetrical Domain Nucleation and Unusual Magnetization Reversal of Ultrathin Co Films and Co/Pt Multilayers With Perpendicular Anisotropy

March 16, 2007
Author(s)
Yu L. Iunin, Yury P. Kabanov, Valerian I. Nikitenko, X M. Cheng, Alexander J. Shapiro, Robert D. Shull, C L. Chien
The features of magnetization reversal in Pt/[CO/Pt]_n}/Pt multilayers (n = 1, 2, 4) have been studied using magneto-optical Kerr microscopy. Asymmetric nucleation centers were revealed where domains form at different positions for up or down magnetic

Component Segregation in Model Chemically Amplified Resists

March 15, 2007
Author(s)
John T. Woodward IV, Theodore Fedynyshyn, David Astolfi, Susan Cann, Michael Leeson
We have applied chemical force microscopy (CFM) to probe the chemical segregation of resist materials. CFM is capable of providing simultaneous information about surface topography and chemical heterogeneity of partiallt developed resist films. We have

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
Displaying 32826 - 32850 of 73929
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