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Displaying 32651 - 32675 of 73830

A Stokes Permeability Solver for Three-Dimensional Porous Media

April 4, 2007
Author(s)
Dale P. Bentz, Nicos Martys
A set of C and Fortran computer programs have been developed for computing the permeability of three-dimensional porous media under incompressible Stokes flow conditions. In this NISTIR, the background for developing these codes is reviewed and the

Recursive Motion Estimation of Range Image

April 4, 2007
Author(s)
Hamid Gharavi, Shaoshuai Gao
In this paper, we present an innovative recursive motion estimation technique that can take advantage of the in-depth resolution (range) to perform an accurate estimation of objects that have undergone 3-D translational and rotational movements. This

A Uniaxial BioMEMS Device for Quantitative Force-Displacement Measurements

April 3, 2007
Author(s)
David Serrell, Tammy L. Oreskovic, Andrew Slifka, Roop L. Mahajan, Dudley Finch
There is a need for experimental techniques that allow the simultaneous imaging of cellular cystoskeletal components with quantitative force measurements on single cells. A bioMEMS device has been developed for the application of strain to a single cell

EQUATION OF STATE AND THERMOPHYSICAL PROPERTIES OF HELIUM-3

April 3, 2007
Author(s)
Yonghua Huang, G.B. Chen, V. Arp, Ray Radebaugh
Experimental data of the thermophysical properties of 3He were mined into a searchable database. Equilibrium equations along the vapor-liquid and liquid-solid lines were proposed. A general equation of state for normal fluid 3He based on the Debye specific

Uniaxial Crushing of Cellular Sandwich Plates Under Air Blast

April 3, 2007
Author(s)
Joseph A. Main, George A. Gazonas
Sandwich plates with cellular metal cores are being widely considered for blast mitigation applications, due largely to the energy absorption capacity of the cellular core material. Computational simulations have shown that sandwich plates exhibit reduced

AC-DC Transfer Standard Measurements with an AC Josephson Voltage Standard

April 2, 2007
Author(s)
Samuel P. Benz, Charles J. Burroughs, Paul D. Dresselhaus, Norman F. Bergren, Thomas E. Lipe, Joseph R. Kinard Jr., Yi-hua Tang
In order to improve the NIST low-voltage calibration service for thermal voltage converters, we have constructed an ac Josephson voltage standard system that can synthesize accurate rms voltages up to 100 mV. Using this system, we synthesized dc voltages

Electrodeposition of Bismuth From Nitric Acid Electrolyte

April 2, 2007
Author(s)
E Sandnes, Maureen E. Williams, Ugo Bertocci, Mark D. Vaudin, Gery R. Stafford
The electrodeposition of Bi from acidic nitrate solution was examined. Bismuth deposition was determined to be quasi-reversible on Au, with a current efficiency of 100%, based on integration of deposition and stripping voltammetric waves. No interference

Final Report: Key Comparison CCQM Pilot Ka35: Determination of Sulfur in Diesel Fuel

April 2, 2007
Author(s)
William R. Kelly, Robert D. Vocke Jr., Jacqueline L. Mann, Gregory C. Turk
The CCQM-K35 Key Comparison was organized by the Inorganic Analysis Working Group (IAWG) of the CCQM to test the capabilities of National Metrological Institutes (NMI s) to measure the sulfur content of diesel fuel at the 40 g/g level. Four NMI s

First-Principles Calculation of the Air-Water Second Virial Coefficient

April 2, 2007
Author(s)
Allan H. Harvey, Peter H. Huang
Recent theoretical work has produced quantitatively accurate potential-energy surfaces for water with common gases. These pair potentials have been used to calculate cross second virial coefficients with an accuracy superior to that obtained by most

Force transmission errors in magnetic suspension densimeters

April 2, 2007
Author(s)
Mark O. McLinden, R Kleinrahm, W Wagner
We present techniques to determine and compensate for the force transmission error (FTE), including the effects of magnetic fluids, in magnetic suspension densimeters. For a two-sinker densimeter, the forces on the balance are written out for each of the

Fragmentation of Leucine Enkephalin as a Function of Laser Fluence in a MALDI TOF-TOF

April 2, 2007
Author(s)
Jennifer M. Campbell, Stephen Stein, Paul S. Blank, Jonathan Epstein, Marvin L. Vestal, Alfred L. Yergey
The effects of laser fluence on ion formation in MALDI was studied using a tandem TOF mass spectrometer using a Nd-YAG laser and alpha-cyano hydrocinnamic acid matrix. Leucine enkephalin ionization and fragmentation were followed over laser fluence ranging

I-NEMI 2007 Organic and Printed Electronics Roadmap

April 2, 2007
Author(s)
Jan Obrzut, Regis J. Kline, Eric K. Lin, David J. Gundlach, Daniel Gamota
This roadmap provides an overview of the most critical technologies necessary for commercial launch and market diffusion of organic & printed electronics based products. To the best of our knowledge, this roadmap is the first of its kind and as such should

THE DEBYE FLUID STATE EQUATION

April 2, 2007
Author(s)
V. Arp, Yonghua Huang, Ray Radebaugh, G.B. Chen
We describe a new form of a fluid state equation, based on a conceptual extrapolation from the Debye equation for the specific heat of solid materials. The Debye characteristic temperature, theta, which is nominally a constant for solids, becomes a

A Low Cost Digital Vibration Meter

April 1, 2007
Author(s)
William V. Payne, Jon Geist
This report describes the development of a low cost vibration amplitude sensor. The processes used to develop this sensor involve the use of Micro-Electronic and Mechanical Systems (MEMS) manufacturing techniques. The major mechanical element of the

A Novel Approach to Measuring Structural Similarity Between XML Documents

April 1, 2007
Author(s)
Boonserm Kulvatunyou, B Jeong, Dongjin Lee, Hyunbo Cho
Measuring structural similarity between XML documents has become a key component in various applications, including XML mining, schema matching, and web service discovery, among others. This paper presents a novel structural similarity measure

A Probabilistic Framework for Semantic Similarity and Ontology Mapping

April 1, 2007
Author(s)
Boonserm Kulvatunyou, Nenad Ivezic, Albert W. Jones, Yun Peng, Zhongli Ding, Rong Pan, Yang Yu, Hyunbo Cho
We propose a probabilistic framework to address uncertainty in ontology-based semantic integration and interopera-tion. This framework consists of three main components: 1) BayesOWL that translates an OWL ontology to a Bayes-ian network, 2) SLBN
Displaying 32651 - 32675 of 73830
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