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NIST Authors in Bold

Displaying 49051 - 49075 of 143727

Temperature-dependent dielectric relaxation in bismuch zinc niobate thin films.

July 12, 2010
Author(s)
James C. Booth, Nathan D. Orloff, Joel Cagnon, Jiwei Lu, Susanne Stemmer
We apply broadband measurement techniques to determine the dielectric permittivity of Bi1.5Zn1.0Nb1.5O7 (BZN) thin films over the frequency range 1 kHz to 40 GHz. At room temperature, the permittivity function shows relaxation at high frequencies (1 GHz)

Computational study of the dielectric properties of [La,Sc] 2 O 3 solid solutions

July 11, 2010
Author(s)
Hiroyoshi Momida, Eric J. Cockayne, Naoto Umezawa, Takahisa Ohno
First-principles calculations were used to compute the dielectric permittivities of hypothetical [La,Sc]2O3 solid solutions in the cubic (bixbyite) and hexagonal La2O3 phases. Dielectric enhancement is predicted at small Sc concentrations due to the

Preface

July 11, 2010
Author(s)
Daniel G. Friend, Marcia L. Huber, Zhuomin M. Zhang
This is a preface to the special issues of the International Journal of Thermophysics that contains selected papers presented at the 17th Symposium on Thermophysical Properties, held in Boulder Colorado 21-26 June 2009.

Residential Heat Pump Heating Performance with Single Faults Imposed

July 11, 2010
Author(s)
Seok H. Yoon, William V. Payne, Piotr A. Domanski
A heat pump equipped with a thermostatic expansion valve (TXV) was tested in environmental chambers during steady-state no-fault and imposed-fault operation. The studied system was an R410A split residential heat pump with an 8.8 kW nominal cooling

Recent Developments in Thermoelectric Metrology at NIST

July 10, 2010
Author(s)
Winnie K. Wong-Ng, Joshua B. Martin, Nathan Lowhorn, Makoto Otani, Evan L. Thomas, Martin L. Green, Jason Hattrick-Simpers, Yonggao Y. Yan, Thanh Tran, Jihui Yang
We have successfully developed several important thermoelectric metrologies in recent years at NIST. First, a low temperature (10 K to 390 K) Seebeck coefficient Standard Reference Material (SRM™), Bi2Te3, which is crucial for inter-laboratory data

2009 Performance Metrics for Intelligent Systems (PerMIS'09) Workshop

July 9, 2010
Author(s)
Rajmohan Madhavan, Elena R. Messina
The Performance Metrics for Intelligent Systems (PerMIS) workshop is dedicated to defining measures and methodologies of evaluating performance of intelligent systems. The main theme of the ninth iteration of the workshop, PerMIS'09, addressed the question

Band Structure of ABC-Stacked Graphene Trilayers

July 9, 2010
Author(s)
Fan Zhang, Bhagawan Sahu, Hongki Min, Allan H. MacDonald
The ABC-stacked N-layer-graphene family of two-dimensional electron systems is described at low energies by two remarkably flat bands with Bloch states that have strongly momentum-dependent phase differences between carbon \pi-orbital amplitudes on

Efficient fiber optic detection of trapped ion flourescence

July 9, 2010
Author(s)
Aaron Vandevender, Yves Colombe, Jason Amini, Dietrich G. Leibfried, David J. Wineland
Integration of fiber optics may play a critical role in the development of quantum information processors based on trapped ions, atoms, and quantum dots. Fibers could help enable a scalable and efficient means of collecting light from and delivering light

The Decomposition and Isomerization of 5-Methylhex-1-yl Radical

July 9, 2010
Author(s)
Iftikhar A. Awan, William S. McGivern, Wing Tsang, Jeffrey A. Manion
The decomposition and isomerization reactions of the 5-methylhex-1-yl radical (1-5MeH) have been studied at temperatures of 889 K to 1064 K and pressures of 1.6 bar to 2.2 bar using the single pulse shock tube technique. The radical of interest was
Displaying 49051 - 49075 of 143727
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