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NIST Authors in Bold

Displaying 26326 - 26350 of 73697

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

Separation and Characterization of Double Wall Carbon Nanotube Sub-Populations

July 8, 2010
Author(s)
JiYeon Huh, Angela R. Hight Walker, Hyun W. Ro, Jan Obrzut, Jeffrey Fagan
We present the separation of surfactant encapsulated double wall carbon nanotubes (DWCNTs) synthesized by the high pressure carbon monoxide decomposition (HiPco) process by length and electronic characteristics using density gradient ultracentrifugation

Community Risk Assessment Modeling: Results of Residential Fireground Field Experiments

July 7, 2010
Author(s)
Adam M. Barowy, Kathy Notarianni, Jason D. Averill, Lori Moore-Merrell, Robert Santos
This paper presents an overview of a large multi-year, multi-partner research study on Firefighter Safety and Deployment of Resources as well as specific results from more than 60 laboratory and residential fireground experiments designed to quantify the

Shell and ligand-dependent blinking of CdSe-based core/shell nanocrystals

July 7, 2010
Author(s)
Bonghwan Chon, Sung Jun Lim, Wonjung Kim, Hyeong G. Kang, Taiha Joo, Jeeseong C. Hwang, Seung Koo Shin
Blinking of zinc blende CdSe-based core/shell nanocrystals is studied as a function of shell materials and surface ligands. CdSe/ZnS, CdSe/ZnSe/ZnS and CdSe/CdS/ZnS core/shell nanocrystals are prepared by colloidal synthesis and six monolayers of larger

Why Contacts Matter

July 7, 2010
Author(s)
David J. Gundlach, Y. Li, D. A. Zhou, D A. Mourey, Thomas Jackson

Quality Assessment Algorithm for Vapor-Liquid Equilibrium Data

July 6, 2010
Author(s)
Jeongwon Kang, Vladimir Diky, Robert D. Chirico, Joe W. Magee, Chris D. Muzny, Ilmutdin M. Abdulagatov, Andrei F. Kazakov, Michael D. Frenkel
A quality assessment algorithm for vapor-liquid equilibrium (VLE) data has been developed. The proposed algorithm combines four widely used tests of VLE consistency based on the requirements of the Gibbs-Duhem equation with a check of consistency between

We need more "smarts" for the Society activity in Smart Grid

July 6, 2010
Author(s)
Galen H. Koepke, Donald Heirman
This editorial column in the Newsletter describes a recent "EMC for the Smart Grid" workshop held at Connectivity Week 2010 in Santa Clara, CA. The text is based on a meeting report from the workshop supplemented with remarks by the Associate Editor for

A Flame Model for Melting and Dripping Polymers

July 5, 2010
Author(s)
Kathryn M. Butler, Sergio R. Idelsohn, Julio M. Marti, Eugenio Onate, Riccardo Rossi
The versatility of polymeric materials, as demonstrated in such features as high strength, low weight, ease of processing, and capability to form into complex shapes, have led to their widespread industrial application in aircraft structures
Displaying 26326 - 26350 of 73697
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