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Search Publications

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Displaying 41376 - 41400 of 73970

High-Accuracy Determination of the Dependence of the PhotoluminescenceEmission Energy on Alloy Composition in Al x Ga 1-x As Films

April 1, 2003
Author(s)
Lawrence H. Robins, J T. Armstrong, Ryna B. Marinenko, Albert J. Paul, J G. Pellegrino, Kristine A. Bertness
In an effort to improve the accuracy of photoluminescence (PL)spectroscopy as a composition (Al mole fraction) measurement method forthe Al xGa 1-xAs alloy system, the PL peak emission energy,E PL,peak, was measured at room temperature for a set of MBE

High-Throughput Investigation of Cell Proliferation on Crystalline Polymers

April 1, 2003
Author(s)
N. R. Washburn, S B. Kennedy, Carl Simon Jr., K Yamada, Eric J. Amis
The results of our investigation of cell proliferation on crystalline polymers will be presented. The goal of the research is to investigate how cells respond to nanometer scale roughness, and crystallizing poly(L-lactic acid) (PLLA) was a convenient

Interlaboratory Comparison of Magnetic Thin Film Measurements

April 1, 2003
Author(s)
F C. Da silva, Chih-Ming Wang, D P. Pappas
A potential low magnetic moment standard reference material (SRM) was studied in an interlaboratory comparison. The mean and the standard deviation of the saturation moment m/s, the remanent moment m/ r, and the intrinsic coercivity H/c of nine samples

Isostructural Self-Assembled Monolayers, Part 1. Octadecyl 1-thiaoligo(ethylene oxides)

April 1, 2003
Author(s)
David J. Vanderah, Richard S. Gates, Vitalii I. Silin, D N. Zeiger, John T. Woodward IV, Curtis W. Meuse, Gintaras Valincius, B Nickel
The self-assembled monolayers (SAMs) of a series of octadecyl 1-thiaoligo(ethylene oxide)x disulfides {[S(CH 2CH 2O) xC 18H 37] 2}, where x = 4 to 8, were assembled on gold and characterized by reflection-adsorption infrared spectroscopy (RAIRS)

Johnson Noise Thermometry Measurements Using a Quantized Voltage Noise Source for Calibration

April 1, 2003
Author(s)
Sae Woo Nam, Samuel Benz, Paul Dresselhaus, Weston L. Tew, David R. White, John M. Martinis
We describe a new approach to Johnson Noise Thermometry(JNT) that takes advantage of recent advances in Josephson voltage standards and digital signal processing techniques. Currently, high-precision thermometry using Johnson noise is limited by the non

LoopDA-Natural Ventilation Design and Analysis Software

April 1, 2003
Author(s)
William S. Dols, Steven J. Emmerich
The Loop Equation Design Method has been proposed for sizing ventilation airflow components of natural and hybrid ventilation systems. While the approach has been demonstrated on a limited basis, the method has been automated in order to better evaluate

Metallurgical Analysis of Wrought Iron From the RMS Titanic

April 1, 2003
Author(s)
J J. Hooper, Timothy J. Foecke, L Graham, Timothy P. Weihs
The discovery of the RMS Titanic has led to a number of scientific studies, one of which addresses the role that structural materials played in the sinking of the ship. Early studies focused on the quality of the hull steel as a contributing role to the

Mitochondrial DNA Mutations in Patients With Myelodysplastic Syndromes

April 1, 2003
Author(s)
M G. Shin, S Kajigaya, Barbara C. Levin, N S. Young
We undertook to systematically analyze the mitochondrial genome by gene amplification and direct sequencing in 10 patients with myelodysplasia: results were compared with concomitantly studied 8 healthy volunteers as well as mtDNA sequences in a standard

Multichannel Decomposition of Heptyl Radicals

April 1, 2003
Author(s)
Wing Tsang, Iftikhar A. Awan, Jeffrey A. Manion
This paper is concerned with decomposition of heptyl radicals in high temperature combustion environments. Experimental results on the decomposition of n-heptyl iodide in single pulse shock tube studies will be presented. All the products resulting from

Optical Frequency Standards and Measurement

April 1, 2003
Author(s)
John L. Hall, Jun Ye
This paper celebrates the progress in optical frequency standards and measurement, won by the 40 years of dedicated work of world-wide teams working in frequency standards and frequency measurement. Amazingly, after this time interval, the field is now

Optimizing the Fast Rydberg Quantum Gate

April 1, 2003
Author(s)
M S. Safronova, Carl J. Williams, Charles W. Clark
The fast phase gate scheme, in which the qubits are atoms confined in sites of an optical lattice, and gate operations are mediated by excitation of Rydberg states, was proposed by Jaksch et al. Phys. Rev. Lett. 85, 2208 (2000). A potential source of

Overview of the TREC 2002 Novelty Track

April 1, 2003
Author(s)
Donna K. Harman
The novelty track was a new track in TREC-11. The basic task was as follows: given a TREC topic and an ordered list of relevant documents (ordered by relevance ranking), find the relevant and novel sentences that should be returned to the user from this

Overview of the TREC 2002 Question Answering Track

April 1, 2003
Author(s)
Ellen M. Voorhees
The TREC question answering track is an effort to bring the benefits of large-scale evaluation to bear on the question answering problem. The track contained two tasks in TREC 2002, the main task and the list task. Both tasks required that the answer

Policy Expression and Enforcement for Handheld Devices

April 1, 2003
Author(s)
Wayne Jansen, Tom T. Karygiannis, Vladimir Korolev, Serban I. Gavrila, Michaela Iorga
The use of mobile handheld devices, such as Personal Digital Assistants (PDAs) and tablet computers, within the workplace is expanding rapidly. These devices are no longer viewed as coveted gadgets for early technology adopters, but instead have become
Displaying 41376 - 41400 of 73970
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