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Displaying 29601 - 29625 of 143806

INFLUENCE OF MATERIAL MODELS ON PREDICTING THE FIRE BEHAVIOR OF STEEL COLUMNS

February 19, 2016
Author(s)
Lisa Y. Choe, Chao Zhang, William E. Luecke, John L. Gross, Amit Varma
Finite-element (FE) analysis was used to compare the high-temperature responses of steel columns with two different stress–strain models: the Eurocode 3 model and the model proposed by National Institute of Standards and Technology (NIST). The comparisons

Two Volt Josephson Arbitrary Waveform Synthesizer Using Wilkinson Dividers

February 19, 2016
Author(s)
Nathan E. Flowers-Jacobs, Anna E. Fox, Paul D. Dresselhaus, Robert E. Schwall, Samuel P. Benz
The root-mean-square (rms) output voltage of the NIST Josephson arbitrary waveform synthesizer (JAWS) has been doubled from 1 V to a record 2 V by combining two new 1 V chips on a cryocooler. This higher voltage will improve calibrations of ac thermal

Vertical 2D/3D Semiconductor Heterostructures based on Epitaxial Molybdenum Disulfide and Gallium Nitride

February 19, 2016
Author(s)
Dmitry A. Ruzmetov, Kehao Zhang, Gheorghe Stan, Berc Kalanyan, Ganesh R. Bhimanapati, Sarah M. Eichfeld, R A. Burke, Pankaj B. Shah, Terrance P. O'Regan, Frank J. Crowne, A. Glen Birdwell, Joshua A. Robinson, Albert Davydov, Tony G. Ivanov
When designing semiconductor heterostructures, it is expected that epitaxial alignment will facilitate low-defect interfaces and efficient vertical transport. Here, we report lattice-matched epitaxial growth of molybdenum disulfide (MoSub2) directly on

Development of a Northern Continental Air Standard Reference Material

February 18, 2016
Author(s)
George C. Rhoderick, Duane Kitzis, Michael E. Kelley, Walter R. Miller Jr., Bradley Hall, Edward Dlugokencky, Pieter Tans, Antonio M. Possolo, Jennifer Carney
The National Institute of Standards and Technology (NIST) recently began to develop standard mixtures of greenhouse gases as part of a broad program mandated by the 2009 United States Congress to support research in climate change. To this end, NIST made

Mitigating Ingredient Variability Risks with Smart Manufacturing

February 18, 2016
Author(s)
Frank H. Riddick, Evan K. Wallace, Jim Davis
Managing the design of products and the efficient execution of the manufacturing processes needed to produce them is an endeavor fraught with all manner of risks for manufacturing enterprises large and small. In certain industries, such as the food

Assessing Electron Backscattered Diffraction and Confocal Raman Microscopy Strain Mapping Using Wedge-indented Si

February 17, 2016
Author(s)
Lawrence Henry Friedman, Mark D. Vaudin, Stephan J. Stranick, Gheorghe Stan, Yvonne B. Gerbig, William Alexander Osborn, Robert F. Cook
The accuracy of electron backscattered diffraction (EBSD) and confocal Raman microscopy (CRM) for small-scale strain mapping are assessed using the multi-axial strain field surrounding a wedge indentation in Si as a test vehicle. The strain field is

Gas Sensing with Bare and Graphene-covered Optical Nano Antenna Structures

February 17, 2016
Author(s)
Bhaven Mehta, Kurt D. Benkstein, Stephen Semancik, Mona E. Zaghloul
The motivation behind this work is to study the gas phase chemical sensing characteristics of optical (plasmonic) nano antennas (ONA) and graphene/graphene oxide-covered versions of these structures. ONA are devices that have their resonating frequency in

Implementing Trusted Geolocation Services in the Cloud

February 17, 2016
Author(s)
Michael J. Bartock, Karen Scarfone, Larry Feldman
The bulletin summarizes the information presented in NISTIR 7904, "Trusted Geolocation in the Cloud: Proof of Concept Implementation". The publication explains security challenges involving Infrastructure as a Service (IaaS) cloud computing technologies

Improved Catalytic Activity and Stability of Palladium Pincer Complex by Incorporation into a Metal-Organic Framework

February 17, 2016
Author(s)
Samantha A. Burgess, Abebu Kassie, Sarah A. Baranowski, Keith J. Fritzsching, Klaus Schmidt-Rohr, Craig Brown, Casey R. Wade
A porous metal-organic framework Zr 6O 4(OH) 4(L-PdX) 3 (1-x) has been constructed from Pd diphosphinite pincer complexes ([L-PdX} 4 = [1,3-(OPAr 2) 2C 6H 3)PdX] 4-, Ar = p-C 6H 4CO 2, X = Cl, I). Reaction of 1-X with Phi(O 2CCF 3) 2 generates 1-TFA, which
Displaying 29601 - 29625 of 143806
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