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Displaying 51 - 75 of 446

Structural Polymorphism in "Kesterite" Cu 2 ZnSnS 4 : Raman Spectroscopy and First-principles Calculations Analysis

March 20, 2017
Author(s)
Mirjana NMN Dimitrievska, Federica Boero, Alexander P. Litvinchuk, Simona Delsante, Gabriella Borzone, Alejandro Perez-Rodriguez, Victor Izquierdo-Roca
This work presents a comprehensive analysis of the structural and vibrational properties of the kesterite Cu 2ZnSnS 4 (CZTS, I-4 space group) as well as its polymorphs with the space group P-42c and P-42m, from both experimental and theoretical point of

The factor of 10 in forensic DNA match probabilities

February 16, 2017
Author(s)
Simone N. Gittelson, Tamyra R. Moretti, Anthony J. Onorato, Bruce Budowle, Bruce S. Weir, John Buckleton
An update was performed of the classic experiments that led to the view that profile probability estimates are usually within a factor of 10 of each other. The data used in this study consist of 15 Identifiler loci collected from forensic publications of a

Unexpected Effect of Field Angle in Magnetoresistance Measurements of High-Purity Nb

June 1, 2005
Author(s)
Loren F. Goodrich, Theodore C. Stauffer, Jolene Splett, Dominic F. Vecchia
We report on unexpected field-angle dependence of the magnetoresistance measurements of commercial, high-purity Nb discovered during our study of residual resistivity ratio ( RRR) measurements. The ( RRR) value indicates the purity and the low-temperature

Measuring residual resistivity ratio of high-purity Nb

July 27, 2004
Author(s)
Loren F. Goodrich, Theodore C. Stauffer, Jolene Splett, Dominic F. Vecchia
We compared methods of measuring the residual resistivity ratio (RRR) of high-purity Nb using transport current. Our experimental study is intended to answer some fundamental questions about the best measurement for RRR and the biases that may exist among

Noise-Temperature Measurement System for the WR-28 Band

August 1, 1997
Author(s)
James P. Randa, L. A. Terrell
… systems covering the WR-62 (12.4 GHz to 18 GHz) and WR-42 (18 GHz to 26.5 GHz) bands. This paper reviews the theory … between the present system and the existing WR-62 and WR-42 systems, much of this document also applies to those …

Initial Etching of GaAs (001) During H 2 Plasma Cleaning

September 1, 2000
Author(s)
Steven W. Robey, K Sinniah
The initial etching of GaAs(001) during remote H 2 plasma etching for oxide removal was examined using Atomic Force Microscopy (AFM), coupled with in situ Reflection High Energy Diffraction (RHEED) and Auger spectroscopy. Localized etching of the GaAs

Scaling of Testing Speed for Different Source-to-Detector Distances

February 13, 2015
Author(s)
Bruce R. Norman, Anne L. Sallaska, Leticia Pibida
Several American National Standard Institute/Institute of Electrical and Electronics Engineers (ANSI/IEEE) and International Electrotechnical Commission (IEC) standards were developed for radiation detection systems used for homeland security applications
Displaying 51 - 75 of 446
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