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NIST Authors in Bold

Displaying 31701 - 31725 of 73697

Parallel-Plate Rheometer Calibration Using Oil and Lattice Boltzmann Simulation

October 11, 2007
Author(s)
Chiara F. Ferraris, Nicos Martys, M R. Geiker, N V. Muzzatti
The flow in traditional rotational rheometers is well known and rheological parameters such as viscosity can be calculated relatively easily. On the other hand, when the fluid is a suspension that contains particles with a diameter up to 2 mm, these

Supplementary Backward Equations p(h,s) for the Critical and Supercritical Regions (Region 3), and Equations for the Two-Phase Region and Region Boundaries of the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam*

October 11, 2007
Author(s)
Allan H. Harvey, J S. Gallagher, H J. Kretzschmar, J R. Cooper, K Knobloch, Radim Mares, K Miyagawa, N Okita, Roland Span, I. Stocker, Wolfgang Wagner, I Weber
In modeling advanced steam power cycles, thermodynamic properties as functions of enthalpy and entropy are required in the critical and supercritical regions (region 3 of IAPWS-IF97). With IAPWS-IF97, these calculations require cumbersome two-dimensional

Guidelines on Securing Public Web Servers

October 9, 2007
Author(s)
Miles C. Tracy, Wayne Jansen, Karen A. Scarfone, Theodore Winograd
Web servers are often the most targeted and attacked hosts on organizations' networks. As a result, it is essential to secure Web servers and the network infrastructure that supports them. This document is intended to assist organizations in installing

Crack Propagation Across an Adhesive Interlayer in Flexural Loading

October 8, 2007
Author(s)
James J. Lee, H Chai, Isabel K. Lloyd, Brian R. Lawn
Crack propagation across interlayers separating adjoining brittle plates in flexure is studied using a model glass/epoxy/glass system. A transverse starter crack in the center glass plate is made to propagate to the nearest epoxy interface, where it

The First High-Resolution Analysis of the 10 [mu]m Absorption of Thioformaldehyde

October 8, 2007
Author(s)
J.- M. Flaud, Walter J. Lafferty, A. Perrin, Y S. Kim, Helmut Beckers
The 10 m region of thioformaldehyde (H2CS) has been recorded at high resolution (0.005 cm-1) using a Fourier transform spectrometer. H2CS was produced by low pressure pyrolysis of a gas flow of C3H5SCH3 in Ar at 560oC or CH3SCl at 1150o C which was

Uniform Calibration of Night Vision Goggles and Test Sets

October 8, 2007
Author(s)
George P. Eppeldauer
There are orders of magnitude differences between the ~0.1 % (k=2) uncertainty of NIST reference detector calibrations and the uncertainty of night vision (NV) goggle measurements. NIST developed a night vision radiometer calibration facility including NV

Usability Testing of Ten-Print Fingerprint Capture

October 8, 2007
Author(s)
Brian C. Stanton, Mary F. Theofanos, Shahram Orandi, Ross J. Micheals, Nien F. Zhang
Despite the increased deployment of biometric technologies in United States government applications, not enough attention is being paid to the human factors that such technologies involve. The use of biometric applications will be unfamiliar to many users

Results in Coastal Waters With High Resolution In Situ Spectral Radiometry: The Marine Optical System ROV

October 5, 2007
Author(s)
M Yarbrough, M Feinholz, S Flora, Terrance Houlihan, B. Carol Johnson, Yong S. Kim, Marilyn Y. Murphy, Michael Ondrusek, D K. Clark
The solar normalized water-leaving spectral radiance is a basic ocean color remote-sensing parameter required for the vicarious calibration and bio-optical product development. Determination of normalized water-leaving spectral radiance using in-water

Quantum Phases of Bosons in Double-Well Optical Lattices

October 4, 2007
Author(s)
Ippei Danshita, J G. Williams, Carlos Sa de Melo, Charles W. Clark
We study the superfluid to Mott insulator transition of bosons in a two-legged ladder optical lattice, of a type accessible in current experiments on double-well optical lattices. The zero-temperature phase diagram is mapped out, with a focus on its

Ultraslow Propagation of Matched Pulses by Four-Wave Mixing in an Atomic Vapor

October 4, 2007
Author(s)
V Boyer, C F. McCormick, E Arimondo, Paul D. Lett
We have observed the ultraslow propagation of matched pulses in nondegenerate four-wave mixing in a hot atomic vapor. Probe pulses as short as 70 ns can be delayed by a tunable time of up to 40 ns with little broadening or distortion. During the

Microwave Dielectric Heating of Fluids in an Integrated Microfluidic Device

October 3, 2007
Author(s)
Jayna J. Shah, Siddarth Sundaresan, Jon Geist, Darwin Reyes-Hernandez, James Booth, Rao Mulpuri, Michael Gaitan
Rapid, selective, and uniform heating of sub-microliter size fluid volumes is vital for micro total analysis system (?gTAS) applications. In this work, we present an approach to localized and selective heating of fluids in a microfluidic network. This is

Precise Time Synchronization in Semiconductor Manufacturing

October 3, 2007
Author(s)
Vinod Anandarajah, Naveen Kalappa, Julien L. Baboud, Ya-Shian Li-Baboud, James Moyne
In today's fabs, coordination of time-based information throughout the factory and enterprise has become necessary. This has driven the need to have time synchronization at all levels of the enterprise. Time synchronization protocols such as Network Time

Evaluation of a Portable Hyperspectral Imager for Medical Imaging Applications

October 2, 2007
Author(s)
David W. Allen, Maritoni A. Litorja, Steven W. Brown, Joseph P. Rice, Yuqin Zong
Portable hyperspectral imagers are becoming commonly available as a commercial product. A liquid crystal tunable filter based CCD imager was evaluated and characterized for spectral stray light using a tunable laser facility. The hyperspectral imager is

The Direct Patterning of Nanoporous Interlayer Dielectric Insulator Films by Nanoimprint Lithography

October 2, 2007
Author(s)
Hyun Wook Ro, Ronald L. Jones, H Peng, Daniel R. Hines, Hae-Jeong Lee, Eric K. Lin, Alamgir Karim, Do Y. Yoon, D Gidley, Christopher L. Soles
Directly patterning dielectric insulator materials via nanoimprint lithography has the potential to simplify fabrication processes and significantly reduce the manufacturing costs for semiconductor devices. However, the prospect of mechanically forming

A Microfabricated Flow Controller for Refrigerant Expansion

October 1, 2007
Author(s)
David A. Yashar, Piotr A. Domanski, Don DeVoe
A flow controller for refrigerant expansion is reported. Devices are fabricated using a micromolding technique developed for thick nickel electroplating. The device consists of a short tube restrictor with an integrated normally-open valve which, when

A Numerical Method to Solve the Boltzmann Equation for a Spin Valve

October 1, 2007
Author(s)
J Xiao, A Zangwill, Mark D. Stiles
We present a numerical algorithm to solve the Boltzmann equation for the electron distribution function in magnetic multilayer heterostructures with non-collinear magnetizations. The solution is based on a scattering matrix formalism for layers that are

Absolute Magnitude and Phase Calibrations

October 1, 2007
Author(s)
Kate Remley, Paul D. Hale, Dylan Williams
In VNA measurements, the magnitude and phase of a transmitted or reflected wave are measured relative to that of the incident wave. VNA measurements are made a single frequency at a time and each frequency component is acquired relative to the internally
Displaying 31701 - 31725 of 73697
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