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Displaying 18551 - 18575 of 74189

Does Your SEM Really Tell the Truth? How Would You Know? Part 2

May 30, 2014
Author(s)
Michael T. Postek, Andras Vladar, Premsagar P. Kavuri
The scanning electron microscope (SEM)has gone through a tremendous evolution to become indispensable for many and diverse scientific and industrial applications. The improvements have significantly enriched and augmented the overall SEM performance and

Influence of Flame Characteristics on Gas- Phase Fire Retardant Effectiveness

May 30, 2014
Author(s)
Gregory T. Linteris, Nicolas Bouvet, Valeri I. Babushok, Fumiaki Takahashi, Viswanath R. Katta, Stanislav Stoliarov, Peter B. Sunderland
The presentation discusses the influence of flame characteristics on gas-phase fire retardant effectiveness. First, the action of super-effective agents in co-flow diffusion flames is reviewed, highlighting how particle formation had a detrimental effect

Large-area irradiance-mode spectral response measurements of solar cells by a light-emitting-diode- based integrating sphere source

May 30, 2014
Author(s)
Behrang H. Hamadani, John F. Roller, Andrew M. Shore, Brian P. Dougherty, Howard W. Yoon
An irradiance-mode absolute differential spectral response measurement system based on a light emitting diode (LED) array is described. The LEDs are coupled to an integrating sphere whose output irradiance is uniform to better than 2 % over an area of 160

Magnetic Ordering induced by Interladder Coupling in the Spin-1/2 Heisenberg Two-leg Ladder Antiferromagnet C 9 H 18 N 2 CuBr 4

May 30, 2014
Author(s)
Tao Hong, K. P. Schmidt, K. Coester, F.F. Awwadi, M.M. Turnbull, Yiming Qiu, Jose Rodriguez Rivera, M. Zhu, X. Ke, C.P. Aoyama, Y. Takano, Huibo Cao, W. Tian, J. Ma, R. Custelcean, H.D. Zhou, M. Matsuda
We present specific-heat and neutron-scattering results for the S=1/2 quantum antiferromagnet (dimethylammonium)(3,5-dimethylpyridinim)CuBr 4. The material orders magnetically at Τ N=1.99(2)K, and magnetic excitations are accompanied by an energy gap of 0

Phase Transitions in K-doped MoO 2

May 30, 2014
Author(s)
L.M.S. Alves, B.S. de Lima, C.A.M. dos Santos, A. Rabello, S.H. Masunaga, J. J. Neumeier, Juscelino Leao
K 0.05MoO 2 has been studied by x-ray and Neutron diffractometry, electrical resistivity, magnetization, heat cpacity, and thermal expansion measurements. The compound displays two phase transitions, a first order phase transition near room temperature and

Report of the 97th National Conference on Weights and Measures (2012)

May 30, 2014
Author(s)
Linda D. Crown, Tina G. Butcher, Richard A. Harshman, David A. Sefcik, Lisa Warfield
The 97th Annual Meeting of the National Conference on Weights and Measures (NCWM) was held July 15 through 19, 2012, at the Holiday Inn by the Bay, Portland, Maine. The theme of the meeting was "Taking Measure of Our Worth." Reports by the NCWM Board of

Alkali Metal Hydride Modification on Hydrazine Boranes for Improved Dehydrogenation

May 29, 2014
Author(s)
Yong Shen Chua, Qijun Pei, Xiaohua Ju, Wei Zhou, Terrence J. Udovic, Guotao Wu, Zhitao Xiong, Ping Chen, Hui Wu
Hydrazinoboranes of various alkali metals, i.e., NaN 2H 3BH 3 and KN 2H 3BH 3, were synthesized via a liquid approach. The crystal structures of NaN 2H 3BH 3 were determined and their dehydrogenation properties were compared with LiN 2H 3BH 3 and N 2H 4BH

Predicting enzyme adsoprtion to lignin films from enzyme surface hydrophobicity

May 29, 2014
Author(s)
Deanne W. Sammond, John M. Yarbrough, Elisabeth Mansfield, Yannick J. Bomble, Sarah Hobdey, Stephen R. Decker, Larry Taylor, Michael G. Resch, Michael E. Himmel, Todd B. Vinzant, Michael F. Crowley
The loss of digestive activity of cellulase cocktails on biomass is a major challenge, commonly attributed to the binding of certain enzymes to lignin. While the binding mechanism remains unclear, hydrophobic interactions between enzymes and lignin are

Virtual Cement and Concrete Testing Laboratory: Version 9.5 User Guide

May 29, 2014
Author(s)
Jeffrey W. Bullard
This document serves as the user’s guide for the Virtual Cement and Concrete Testing Laboratory (VCCTL) software, version 9.5. Using the VCCTL software, a user may create 3D microstructures of cement paste made with clinker, calcium sulfate, fly ash, slag

CCQM-P151 Draft A Report Pilot Study CCQM P151 Halocarbons in Dry Whole Air

May 28, 2014
Author(s)
George C. Rhoderick, Franklin R. Guenther, David L. Duewer, Jeongsoon Lee, Jin S. Kim, Bradley Hall, Ray Weiss, Christina Harth, Stefan Reimann, Martin Vollmer
The growing awareness of climate change/global warming and continuing concerns regarding stratospheric ozone depletion will require future measurements and standards for many compounds, in particular halocarbons that are linked to these issues. In order to

Correlation of anomalous write error rate and ferromagnetic resonance spectrum in spin-transfer-torque-magnetic-random-access-memory devices containing in-plane free layers

May 28, 2014
Author(s)
Eric R. Evarts, Ranko R. Heindl, William H. Rippard, Matthew R. Pufall
In a small fraction of magnetic-tunnel-junction-based MRAM devices with in-plane free layers, the write error rates (WERs) are higher than expected on the basis of the macrospin or quasi-uniform magnetization reversal models. In devices with increased WERs

Effect of Pnictogen Height on Spin Waves in Iron Pnictides

May 28, 2014
Author(s)
Chenglin Zhang, Leland Harriger, Zhiping Yin, Weicheng Lv, Miaoyin Wang, Guotai Tan, Yu Song, D. L. Abernathy, Wei Tian, Takeshi Egami, Kristjan Haule, Gabriel Kotliar, Pengcheng Dai
We use inelastic neutron scattering to study spin waves in the antiferromagnetic ordered phase of iron pnictide NaFeAs throughout the Brillouin zone. Comparing with the well-studied AFe 2As 2 (A = Ca,Sr,Ba) family, spin waves in NaFeAs have considerably

Evaluating the Uncertainty of Input Quantities in Measurement Models

May 28, 2014
Author(s)
Antonio M. Possolo
The Guide to the Expression of Uncertainty in Measurement gives guidance about how values and uncertainties should be assigned to the input quantities that appear in measurement models. This contribution offers a concrete proposal for how that guidance may

Hybrid superconducting-magnetic memory device using competing order parameters

May 28, 2014
Author(s)
Burm Baek, William H. Rippard, Samuel P. Benz, Stephen E. Russek, Paul D. Dresselhaus
The quantum behavior of Josephson junctions is often exploited to produce superconducting devices with outstanding performance. Josephson junctions can also be used in circuits that perform logic operations in picoseconds and may enable high-performance

Localization and electron-electron interactions in few-layer epitaxial graphene

May 28, 2014
Author(s)
Randolph E. Elmquist, Fan-Hung Liu, Lung-I Huang, Yasuhiro Fukuyama, Chi-Te Liang, Yanfei Yang
We study the quantum corrections caused by electron-electron (e-e) interactions and localization to the conductivity in few-layer epitaxial graphene, in which the carriers responsible for transport are massive. Our results demonstrate that the diffusive
Displaying 18551 - 18575 of 74189