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Displaying 29151 - 29175 of 74036

TRC Thermodynamic Tables, Non-Hydrocarbon Supplement NH-100 (December 2008)

January 20, 2009
Author(s)
Michael D. Frenkel
1. Table 23-2-1-(1.10212)-db: Page db-5096.0 New table for 2-hexanol containing the density for the real fluid at selected temperatures and pressures. 2. Table 23-2-1-(1.16010)-db: Pages db-5852.0 and db-5852.1 New table for dimethyl carbonate containing

Dimensional measurement traceability of 3D imaging data

January 19, 2009
Author(s)
Steven D. Phillips, Craig M. Shakarji, Michael Krystek, K Summerhays
This paper discusses the concept of metrological traceability to the SI unit of length, the meter. We describe how metrological traceability is realized, give a recent example of the standardization of laser trackers, and discuss progress and challenges to

Target Penetration of Laser-Based 3D Imaging Systems

January 19, 2009
Author(s)
Geraldine S. Cheok, Kamel S. Saidi, Marek Franaszek
The ASTM E57.02 Test Methods Subcommittee is developing a test method to evaluate the ranging performance of a 3D imaging system. The test method will involve either measuring the distance between two targets or between an instrument and a target. The

Predicting Failure in Mammalian Enamel

January 16, 2009
Author(s)
Brian R. Lawn, James J. Lee, Paul Constantino, Peter Lucas
Dentition is a vital element of human and animal function, yet there is little fundamental knowledge about how tooth enamel endures under stringent oral conditions. This paper describes a novel approach to the issue. Model glass dome specimens fabricated

Bifurcations, Center Manifolds, and Periodic Solutions

January 15, 2009
Author(s)
David E. Gilsinn
Nonlinear time delay differential equations are well known to have arisen in models in physiology, biology, and population dynamics. They have also arisen in models of metal cutting processes. Machine tool chatter, from a process called regenerative

Creating a supersolid in one-dimensional Bose mixtures

January 15, 2009
Author(s)
Ludwig G. Mathey, Ippei Danshita, Charles W. Clark
We identify a one-dimensional supersolid phase in a binary mixture of near-hardcore bosons with weak, local interspecies repulsion. We find realistic conditions under which such a phase, defined here as the coexistence of quasi-superfluidity and quasi

Living Anionic Polymerization Using a Microfluidic Reactor

January 15, 2009
Author(s)
Thomas Q. Chastek, Kazunori Iida, Eric J. Amis, Michael J. Fasolka, Kathryn L. Beers, Jae H. Chun
Living anionic polymerizations were conducted within aluminum-polyimide microfluidic devices. Polymerizations of styrene in cyclohexane were carried out at various conditions, including elevated temperature (60 °C) and high monomer concentration (42 %, by

Reference Correlations for Thermophysical Properties of Liquid Water at 0.1 MPa

January 15, 2009
Author(s)
Jan Hruby, Jaroslav Patek, Jaroslav Klomfar, Monika Souckova, Allan H. Harvey
Simple but highly accurate correlations have been developed for the thermodynamic properties, viscosity, thermal conductivity, and static dielectric constant of liquid water as a function of temperature at a pressure of 0.1 MPa. The temperature range

Selected Impacts of Documentary Standards Supported by NIST

January 15, 2009
Author(s)
Erik Puskar
This report reflects the results of a survey that canvassed the National Institute of Standards and Technology s (NIST) Operating Units (OUs) for instances where NIST has played an active role in the development or implementation of documentary standards

Capillary Rise between Planar Surfaces

January 14, 2009
Author(s)
Jeffrey W. Bullard, Edward J. Garboczi
Minimization of free energy is used to calculate the equilibrium verticalrise and mensicus shape of a liquid column between two closelyspaced, parallel planar surfaces that are inert and immobile. States of minimum free energy are found using standard

Equilibrium Electrostatics of Responsive Polyelectrolyte Monolayers

January 14, 2009
Author(s)
Rebecca A. Zangmeister, Rastislav Levicky, Kang Wang
The physical behavior of polyelectrolytes at solid-liquid interfaces presents challenges both in measurement and in interpretation. An informative, yet often overlooked, property that characterizes the equilibrium organization of these systems is their

Miniature atomic magnetometer integrated with flux concentrators

January 14, 2009
Author(s)
William C. Griffith, Ricardo Jimenez Martinez, Vishal Shah, Svenja A. Knappe, John E. Kitching
A major limitation on the sensitivity of alkali atomic magnetometers, spin-exchange relaxation, can be completely eliminated by operating at low magnetic field and high alkali density. This allows the miniaturization of atomic magnetometers while retaining

Miniature atomic magnetometer integrated with flux concentrators

January 14, 2009
Author(s)
William C. Griffith, Svenja A. Knappe, John E. Kitching, Ricardo Jimenez Martinez, Vishal Shah
High permeability magnetic flux concentrators are used to enhance the sensitivity of an atomic magnetometer operating in the spin exchange relaxation free regime. The magnetometer uses a millimeter scale 87Rb vapor cell and either mu-metal or Mn-Zn ferrite

Round-Robin Studies of Two Potential Seebeck Coefficient Standard Reference Materials

January 14, 2009
Author(s)
Nathan Lowhorn, Winnie K. Wong-Ng, Weiping Zhang, John Lu, Makoto Otani, Evan L. Thomas, Martin L. Green, Thanh Tran
The scientific activities of NIST include the development and distribution of standard reference materials (SRM) for instrument calibration and inter-laboratory data comparison. Full characterization of a thermoelectric material requires measurement of the

Wear-out and Time Dependent Dielectric Breakdown in Silicon Oxides

January 14, 2009
Author(s)
John S. Suehle
This chapter will discuss the various physical mechanisms proposed for defect generation and dielectric breakdown in thin silicon dioxide films. Current understanding of the driving forces for defect generation will be presented as well as statistical

400-Fold Reduction in Saturation Field by Interlayering

January 13, 2009
Author(s)
William F. Egelhoff Jr., John E. Bonevich, Philip Pong, John Unguris, Robert D. McMichael, Gery R. Stafford, Carlos R. Beauchamp
The buildup of stress with increasing thickness of magnetic thin films is a common phenomenon that often induces undesirable saturation fields that can convert an otherwise magnetically soft film into a magnetically hard one. We have found that by

Synthesis and Transport Properties of Framework-Substituted Cs 8 Na 16 Cu 5 Ge 131

January 13, 2009
Author(s)
Matthew Beekman, James A. Kaduk, J Gryko, Winnie Wong-Ng, Alexander J. Shapiro, George S. Nolas
We report the synthesis and temperature dependent transport properties of a new type II germanium clathrate, Cs8Na16Cu5Ge131 (space group Fd3m; a = 15.42000(9) ) . In comparison to the parent compound Cs8Na16Ge136, Cu substitution for Ge on the clathrate

Laser-produced X-Ray Sources

January 12, 2009
Author(s)
Lawrence T. Hudson, J Seely
A formidable array of advanced laser systems are emerging that produce extreme states of light and matter. By irradiating solid and gaseous targets with lasers of increasing energy densities, new physical regimes of radiation effects are being explored for

Slap Fingerprint Segmentation Evaluation II - Procedures and Results

January 12, 2009
Author(s)
Craig I. Watson
In 2004, NIST conducted a fingerprint slap segmentation study [1] to assess the state-of-the-art in fingerprint segmentation technology. Given the development of new technology it has become necessary to reassess the current state-of-the-art of

Striped Domains at the Pentacene:C 60 Interface

January 12, 2009
Author(s)
Dan B. Dougherty, W Jin, J Cullen, J Reutt-Robey, Steven W. Robey
STM observations of the initial growth stages of the first layer of pentacene on a monolayer film of C60 on Ag(111) are presented. Pentacene films nucleate and grow with molecules standing up at the Pentacene:C60 interface similar to the well known thin

Structural and thermoelectric properties of Bi2Sr2Co2Oy thin films on LaAlO3 (100) and fused silica substrates

January 12, 2009
Author(s)
Winnie K. Wong-Ng, Mark D. Vaudin, Shufang Wang, L Venimadhav, Shengming Guo, Ke Chen, Qi Li, A Soukiassian, D.G. Schlom, X.Q. Pan, D.G. Cahill, X. X. Xi
We have grown Bi2Sr2Co2Oy thin films on LaAlO3 (100) and fused silica substrates by pulsed laser deposition. The films on LaAlO3 are c-axis oriented and partially in-plane aligned with multiple domains while the films on fused silica are preferred c-axis
Displaying 29151 - 29175 of 74036
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