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Displaying 45226 - 45250 of 74222

Government Activity to Increase Benefits from the Global Standards System

October 3, 2001
Author(s)
Roger Marks, Robert E. Hebner
The economic development of the Twentieth Century was accompanied and enhanced by the increasing use of documentary standards, largely developed by industry. In the current environment, companies and nations in global competition adopt various strategies

A Classical Kinetic Theory Approach to Lattice Boltzmann Simulation

October 1, 2001
Author(s)
Nicos Martys
An approach to lattice Boltzmann simulation is described, which makes a direct connection between classical kinetic theory and contemporary lattice Boltzmann modeling methods. This approach can lead to greater accuracy, improved numerical stability and

A Methodology for Compensating Errors Detected by Process-Intermittent Inspection

October 1, 2001
Author(s)
Herbert T. Bandy, M A. Donmez, David E. Gilsinn, Michael Kennedy, Kenneth W. Yee, Alice V. Ling, Neil D. Wilkin
This report describes principles and methodology for compensating geometric errors of machined parts due to machining processes. The error tendencies are identified by on-machine inspection of the part before the finish cut. Tool path adjustments

A New Approach to Lattice Boltzmann Simulation

October 1, 2001
Author(s)
Nicos Martys
A new approach to lattice Boltzmann simulation is introduced which avoids the direct numerical determination of the single-particle distribution from the Boltzmann collision operator. Instead, one starts from the Chapman-Enskog expansion of the single

Accuracy and Versatility of the NIST M48 Coordinate Measuring Machine

October 1, 2001
Author(s)
John R. Stoup, Theodore D. Doiron
The NIST Is continuing to develop the ability to perform accurate, traceable measurements on a wide range of artifacts using a very precise, error-mapped coordinate measuring machine (CMM). The NIST M48 CMM has promised accuracy and versatility for many

Anomalous Transitions in Two-Level Systems Driven by the AC Stark Effect

October 1, 2001
Author(s)
W L. Meerts, I Ozier, Jon T. Hougen
An unusual type of non-resonant absorption signal produced by the ac Stark effect has been observed in a two-level avoided-crossing system. The theory for these anomalous transitions has been developed. The non-resonant signals have been shown to be caused

Ballistic Magnetoresistance in a Nanocontact Between a Ni Cluster and a Magnetic Thin Film

October 1, 2001
Author(s)
M Munoz, G G. Qian, N Karar, H. Cheng, I G. Saveliev, N Garcia, Thomas P. Moffat, P J. Chen, L Gan, William F. Egelhoff Jr.
We present measurements of ballistic magnetoresistance in nanocontacts grown by electrodeposition of Ni microclusters on magnetic thin films covered by aluminum oxide layers, using a technique proposed by Schad, et al. The measurements are made on a single

Classical Kinetic Theory Approach to Lattice Boltzmann Simulation.

October 1, 2001
Author(s)
N S. Martys
An approach to lattice Boltzmann simulation is described, which makes a direct connection between classical kinetic theory and contemporary lattice Boltzmann modeling methods. This approach can lead to greater accuracy, improved numerical stability and

Comparisons of Calculated and Measured Flaw Sizes

October 1, 2001
Author(s)
George D. Quinn, J Swab
Fracture mechanics often is applied in fractographic analyses in order to verigy that the correct feature has been identified as the fracture origin. This step has been codified in ASTM Standard C1322-96, Standard Practice for the Characterization of

Conformance Criteria for Enterprise-Reference Architectures

October 1, 2001
Author(s)
Jim G. Nell
he purpose of this paper is to evaluate the feasibility of imposing conformance criteria on enterprise-reference architectures. Determining whether a software implementation conforms to a specification or standard is expensive because of the number of

Conformance Resources and Information

October 1, 2001
Author(s)
Mark Skall
The National Software Reference Library (NSRL) of the U.S. National Institute of Standards and Technology (NIST) collects software from various sources and publishes file profiles computed from this software (such as MD5 and SHA-1 hashes) as a Reference

Creating Massive Entanglement of Bose-Einstein Condensed Atoms

October 1, 2001
Author(s)
Kristian Helmerson, L You
We propose a direct, coherent coupling scheme that can create massive entangled states of Bose-Einstein condensed atoms. One idea is based n an effective interaction between two atoms from coherent RAman processes through a (two atom) molecular

De la Pate de Ciment au Beton: Modlisation et Mesures Exprimentales des Proprietes Rhologiques. [Cement Paste to the Concrete Modisation and Measure Experimental of the Properties Rheology.]

October 1, 2001
Author(s)
Chiara F. Ferraris, Nicos Martys
The prediction of concrete rheological properties is essential for the correct use of the material. The composition of the concrete is nowadays complex. It is not limited to cement, aggregates and water but also includes admixtures and fillers. Therefore

Designing Quantum Dots and Quantum-Dot Solids

October 1, 2001
Author(s)
Garnett W. Bryant, W Jaskolski
To design nanocrystal nanosystems a theory for nanocrystals is needed which can be applied to nanocrystals with atomic-scale variations in composition, structure and shape. We present an empirical tight-binding theory for nanocrystal heteroanostructures

Dielectric Sleeve Resonator Techniques for Microwave Complex Permittivity Evaluation

October 1, 2001
Author(s)
Richard G. Geyer, Pavel Kabos, James R. Baker-Jarvis
Closed-form analytical solutions are derived for accurate microwave dielectric characterization of rod test specimens inserted into dielectric sleeve resonators placed certrally in a metal cavity. Low-loss sleeve resonators can be used advantageously for

Dynamic Constitutive Relations for Polarization and magnetization

October 1, 2001
Author(s)
James R. Baker-Jarvis, Pavel Kabos
New engineered artificial and metamaterials combine ferroelectrics, ferrites, wires, resonant rings, and ferromagnetic materials to obtain a desired response. In this paper we develop constitute relations for materials where the magnetization and
Displaying 45226 - 45250 of 74222
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