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Displaying 49101 - 49125 of 74068

Alignment Procedure for Field-Evaluation Measurements on a Spherical Surface

October 1, 1999

Author(s)

Jeffrey R. Guerrieri, Nino Canales

This paper describes the alignment procedure for using a spherical near-field measurement facility to determine incident fields throughout a spherical volume.

Alignment Procedures for Field-Evaluation Measurements on a Spherical Surface

October 1, 1999

Author(s)

Jeffrey R. Guerrieri, Seturnino Canales

An Accurate Method for Measuring the Dielectric Constant of Printed Wiring Board Materials

October 1, 1999

Author(s)

Nicholas G. Paulter Jr.

An Improved Empirical Correlation for the Thermal Conductivity of Propane

October 1, 1999

Author(s)

M L. Ramires, Carlos A. Nieto de Castro, Richard A. Perkins

New experimental data on the thermal conductivity of propane have been reported since the wide-range correlations proposed by Holland et al. And by Younglove and Ely. These new experimental data, covering a temperature range of 110 to 700 K and a pressure

An Improved Wide Band Antenna Test Cell: The Co-Conical Field Generation System

October 1, 1999

Author(s)

David R. Novotny, Robert T. Johnk, Arthur Ondrejka

We introduce a prototype test cell for generating wide-band standard fields suitable for antenna and immunity testing.

Analytical and Diagnostic Techniques for Semiconductor Materials, Devices, and Processes

October 1, 1999

Author(s)

B O. Kolbensen, C Claeys, P Stallhofer, F Tardif, Kimberly Benton, Thomas J. Shaffner, D Schroder, S Kishino, P Rai-Choudhury

Anisotropic Small-Angle Neutron Scattering Studies of Ceramics

October 1, 1999

Author(s)

Andrew J. Allen, Lin-Sien H. Lum, K T. Faber, M H. Zimmerman, Jay S. Wallace

This paper discusses how small-angle neutron scattering studies can be applied in two variations to obtain a representative characterization of the large, densely-populated, and anisotropic features that occur in the microstructures of various materials

Annual Progress Report for Streamlining the Nation's Building Regulatory Process Project. For Grant Period: September 1998 to September 1999.

October 1, 1999

Author(s)

Standards and Technology National Institute of

In 1996, the originators of the Streamlining the Nation's Building Regulatory Process project agreed that proven examples of regulatory streamlining initiatives should be collected from jurisdictions across the country and at all levels of government

Antenna Gain Measurements at the National Institute of Standards and Technology: The Three-Antenna Extrapolation Method

October 1, 1999

Author(s)

Katherine MacReynolds, Michael H. Francis

This paper describes the extrapolation measurement method for determining gain of directive antennas at quasi-near-field distances.

Application of the Three O Method to a Film on a Substrate of Finite Thickness

October 1, 1999

Author(s)

J Y. Kim, A Feldman, Donald B. Novotny

The three omega thermal conductivity measurement method is analyzed for the case of one or more thin films on a substrate of finite thickness. The analysis is used to obtain the thermal conductivities of SiO 2 films on Si substrates and of a chemical vapor

Applying Mobile Agents to Intrusion Detection and Response

October 1, 1999

Author(s)

Wayne Jansen, Tom T. Karygiannis, D G. Marks, Peter M. Mell

Effective intrusion detection capability is an elusive goal, not solved easily or with a single mechanism. However, mobile agents go a long way toward realizing the ideal behavior desired in an Intrusion Detection System (IDS). This report is an initial

Boltzmann Analysis of Electron Swarm Parameters in CF 4 Using Independently Assessed Electron-Collision Cross Sections

October 1, 1999

Author(s)

M. C. Bordage, P. Segur, Loucas G. Christophorou, James K. Olthoff

Using independently assessed electron-collision cross sections, electron swarm parameters were calculated via the solution of the Boltzmann equation under the hydrodynamic regime. The cross sections used for the calculations were from a previously

Buoyant Turbulent Jets and Flames. Part 1. Adiabatic Wall Plumes. Annual Report.

October 1, 1999

Author(s)

R Sangras, Z Dai, G M. Faeth

An investigation of the structure and mixing properties of buoyant turbulent plumes is described, motivated by the need to resolve effects of buoyancy/turbulence interactions and to provide data required to benchmark models of buoyant turbulent flows for

Buoyant Turbulent Jets and Flames. Part 3. Round Turbulent Nonbuoyant Starting Jets and Puffs and Buoyant Starting Plumes and Thermals. Annual Report.

October 1, 1999

Author(s)

R Sangras, Z Dai, G M. Faeth

A theoretical and experimental study of the temporal development of round turbulent nonbuoyant starting jets and puffs and buoyant starting plumes and thermals is described, limited to sources in still and unstratified environments. The experiments

Business Planning and Progress of Small Firms Engaged in Technology Development Through the Advanced Technology Program

October 1, 1999

Author(s)

J Powell

This report assesses participation, strategies, and progress of firms engaged in technology development through partnerships with the Advanced Technology Program (ATP). The focus is on the performance of small firms (those with fewer than 500 employees)

Ceramic Measures: News of the Ceramic Processing Characterization Consortium, October 1999

October 1, 1999

Author(s)

S Jahanmir

The Ceramic Processing Characterization Consortium (CPCC) held its semi annual meeting in Indianapolis on April 25, 1999. The meeting was attended by over 60 members of the consortium. The meeting was opened by Steve Freiman, who introduced Said Jahnmir as

Characterization and Identification of Super-Effective Thermal Fire Extinguishing Agents. First Annual Report.

October 1, 1999

Author(s)

William M. Pitts, Jiann C. Yang, Marcia L. Huber, L G. Blevins

The use of halons for fire fighting is being phased out due to their deleterious effects on stratospheric ozone. This report summarizes the first-year findings of a three-year study designed to characterize and identify super-effective thermal fire

Characterizing Lumped-Element Calibrations for Four-Sampler Vector Network Analyzers

October 1, 1999

Author(s)

Jeffrey Jargon, Roger Marks, D. K. Rytting

Chemo-Mechanical Machining of Ceramics

October 1, 1999

Author(s)

Richard S. Gates, Stephen M. Hsu

Chemically assisted machining of ceramics is a way to remove ceramic materials rapidly using chemical reactions at the interface between the tool and the workpiece. Two effects are observed: chemical reactions that react with he workpiece forming an easily

Collaboration Technologies for Global Manufacturing

October 1, 1999

Author(s)

Michelle P. Steves, Amy Knutilla

One impact of the globalization of manufacturing is the growing requirement for teams that are not co-located to collaborate using shared information. In this paper, we present our approach to instituting and assessing collaboration technologies for

Comments on "Correction Factors for the Heat of Combustion in NFPA 72 Appendix B".

October 1, 1999

Author(s)

William D. Davis

I want to express some reservations concerning the revision to NFPA 72 Appendix B that is being considered based on an article by Christopher E. Marrion in Fire Protection Engineering. The rationale for this revision is based on a paper published by

Comparison of Microwave and Mutual Inductance Measurements of the Inductive Nonlinearity of HTS Thin Films

October 1, 1999

Author(s)

John H. Claassen, James Booth, James A. Beall, Leila R. Vale, David A. Rudman, Ronald H. Ono

Comparison of Passive Intermodulation Measurements for the U. S. Wireless Industry

October 1, 1999

Author(s)

Jeffrey Jargon, Donald C. DeGroot

In response to requests by U.S. industry and members of the International Electrotechnical Commission, the National Institute of Standards and Technology initiated a passive intermodulation measurement comparison for the U.S. wireless industry.

Complex Permittivity of Some Ultra-Low Loss Crystals at Cryogenic Temperature

October 1, 1999

Author(s)

Jerzy Krupka, Kristof Derzakowski, M. E. Tobar, J. G. Hartnett, Richard G. Geyer

Concealment and Obstacle Detection for Autonomous Driving

October 1, 1999

Author(s)

Tommy Chang, Tsai Hong Hong, Steven Legowik, Marilyn N. Abrams

Obstacle detection and mapping are essential for unmanned autonomous driving. This paper describes both the sensors and the supporting software used in our system for driving autonomously on cross-country roads. The Ladar Range Imaging Camera (EBK) is used

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