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Displaying 50401 - 50425 of 73871

Corrosion Fatigue Crack Initiation in Duplex Stainless Steel Paper Making Components

March 1, 1999

Author(s)

Mark R. Stoudt

The pulp and paper industry is frequently impacted by the enormous cost of replacing prematurely failed suction roll shells and other metallic components. The results of a great deal of research has lead to numerous improvements in the models used for life

Crystal Structures and Reference Powder Patterns of BaR 2 ZnO 5 (R=La, Nd, Sm, Eu, Gd, Dy, Ho, Y, Er, and Tm)

March 1, 1999

Author(s)

James A. Kaduk, Winnie Wong-Ng, W Greenwood, J Dillingham, B H. Toby

Reference x-ray patterns and the crystal structure of the lanthanide compounds, BaR 2ZnO 5, in which R=La, Nd, Sm, Eu, Gd, Dy, Ho, Y, and Er, were studied by x-ray Rietveld refinement technique. A structural trend was confirmed for this series of compounds

Curing of High-Performance Concrete: Report of the State-of-the-Art

March 1, 1999

Author(s)

K W. Meeks, Nicholas J. Carino

This report describes the latest information, technology, and research on the curing of high-performance concrete (HPC). The scope of the report is expanded somewhat to examine the current body of knowledge on the effects of various curing conditions on

Detector Strategy for the Scanning Electron Microscope Inspection and Metrology of Semiconductor Wafers

March 1, 1999

Author(s)

O C. Wells, Michael T. Postek

Determination of Heats of Adsorption of Hydrocarbons on a Synthetic Clay by Gas-Solid Chromatography Using a Wall Coated Open Tubular Column Approach

March 1, 1999

Author(s)

Thomas J. Bruno, A Lewandowska, F Tsvetkov, Howard J. Hanley

Heats of adsorption for a series of hydrocarbons on Laponite-RD clay were determined by two gas chromatographic methods.

Dielectric and Magnetic Properties of Printed Wiring Boards and Other Substrate Materials

March 1, 1999

Author(s)

James R. Baker-Jarvis, Billy F. Riddle, Michael D. Janezic

This is an overview of dielectric and magnetic material measurements on printed wiring board and substrate materials. The most commonly used methods are presented. We begin with an overview of pertinent properties of circuit-board and substrate materials

Dielectric and Ultrasonic Anomalies at 16, 37, and 65 K in SrTiO 3

March 1, 1999

Author(s)

C Ang, J F. Scott, Z Yu, H M. Ledbetter, J L. Baptista

In this paper we report coincident anomalies in both dielectric response and sound velocities in strontium titanate around three temperatures 16.37 and 65 K. The anomalies occur in both single-crystal specimens and ceramics so they cannot be related to

Draft Guidelines for Evaluating Liquefaction Resistance Using Shear Wave Velocity Measurements and Simplified Procedures

March 1, 1999

Author(s)

R D. Andrus, K H. Stokoe, R M. Chung, C H. Juang

Predicting the liquefaction resistance of soil is an important step in the engineering design of new and the retrofit of existing structures in earthquake-prone regions. The procedure currently used in the U.S. and throughout much of the world to predict

Electronics Factory Integration: The National Electronics Manufacturing Initiative (NEMI) Factory Information Systems (FIS) Roadmap and Projects

March 1, 1999

Author(s)

Barbara L. Goldstein

Electronics Factory Integration: The National Electronics Manufacturing Initiative (NEMI) Factory Information Systems (FIS) Roadmap and Projects

March 1, 1999

Author(s)

Barbara L. Goldstein

This paper provides an overview of the explosive growth of outsourcing in the electronics industry, which has created a 30% growth rate in the Electronics Manufacturing Services (EMS) sector. Increased outsourcing has highlighted the need for Factory

Engineering Receptor-Mediated Cytotoxicity Into Human Ribonucleases by Steric Blockade of Inhibitor Interaction

March 1, 1999

Author(s)

M Suzuki, S K. Saxena, E Boix, R J. Prill, V M. Vasandani, Jane E. Ladner, C Sung, R J. Youle

Several nonammalian members of the Rnase A superfamily exhibit anticancer activity that appears to correlate with resistance to the cytosolic ribonuclease inhibitor (RI). We mutated two human ribonucleases-pancreatic Rnase (hRNAse) and eosinophil-derived

Estimating the Virial Coefficients of the Ammonia + Water Mixture

March 1, 1999

Author(s)

L A. Weber

A corresponding states type model has been used to estimate the second and third virial coefficients of the NH 3 + H 2O mixture. Additional mixing parameters were added to the formulations for both coefficients to account for the chemical interactions

Evaluated Kinetic and Photochemical Data for Atmospheric Chemistry, Organic Species: Supplement VII

March 1, 1999

Author(s)

R Atkinson, D L. Baulch, R A. Cox, Robert F. Hampson, J A. Kerr, M J. Rossi, J Troe

This paper updates and extends part of the previous data base of critical evaluations of the kinetics and photochemistry of gas-phase chemical reaction of neutral species involved in atmospheric chemistry [J. Phys. Chem. Ref. Data 9, 295 (1980); 11, 327

Evaluation of Analytical Methodologies for Non-Intrusive Drug Testing--Supercritical Fluid Extraction of Cocaine from Hair

March 1, 1999

Author(s)

J F. Morrison, L T. Sniegoski, W J. Yoo, Alim A. Fatah

Supercritical fluid extraction (SFE) was investigated as an environmentally friendly alternative to currently used wet chemical procedures in hair drug testing protocols. The SFE behavior of cocaine and its primary metabolite benzoylecgonine was studied

External Radiative Quantum Efficiency of 96 % from a GaAs/GaInP Heterostructure

March 1, 1999

Author(s)

H G. Gauck, T H. Gforerer, M J. Renn, Eric A. Cornell, Kristine A. Bertness

GaAs/GaInP double heterostructures are index matched with ZnSe hemispheres to increase the coupling of photoluminescence out of the device. We measure external quantum efficiencies as large as 96 % using a bolometric calibration technique. When the

Fire Safety of Passenger Trains. Phase 1: Material Evaluation (Cone Calorimeter) (NISTIR 6132)

March 1, 1999

Author(s)

Richard D. Peacock, E Braun

This report presents the results of Cone Calorimeter testing of selected materials from current passenger train systems. The test data from this test method were compared to FRA guideline test results. The Cone Calorimeter data was also tabulated to

Four-Wave Mixing With Matter Waves

March 1, 1999

Author(s)

Lu Deng, Edward W. Hagley, J Wen, M Trippenbach, Y B. Band, Paul S. Julienne, J E. Simsarian, Kristian Helmerson, S L. Rolston, William D. Phillips

The advent of the laser as an intense, coherent light source gave birth to nonlinear optics, which now plays an important role in many areas of science and technology. One of the first applications of nonlinear optics was the production of coherent light

Generic Centerline Velocity Decay Curve for Initially Turbulent Axisymmetric Jets

March 1, 1999

Author(s)

G Papadopoulos, William M. Pitts

Recently the authors introduced a length scale which effectively collapsed the near field centerline development of velocity and mass fraction for variable density axisymmetric jets whose initial conditions correspond to those of fully developed turbulent

Global Positioning System Receivers and Relativity

March 1, 1999

Author(s)

Neil Ashby, Marc A. Weiss

Incorporation of Non-Steady-State Unimolecular and Chemically Activated Kinetics Into Complex Kinetic Schemes. I. Isothermal Kinetics and Constant Pressure

March 1, 1999

Author(s)

Vadim D. Knyazev, Wing Tsang

A general method of accounting for non-steady-state unimolecular kinetics of reactive species in complex kinetic schemes is described. The method is based on dividing the overall population of affected species into virtual components corresponding to

Initial Manufacturing Exchange Specification (IMES):Information Model for the Process Plan-Workstation Level

March 1, 1999

Author(s)

Yung-Tsun T. Lee

This document is a Phase III document of Initial Manufacturing Exchange Specification (IMES) for the process plan - workstation level. It follows the Phase II document of the requirement analysis for the process planning specification. The Phase II

Interactions of Polymers with Fillers and Nanocomposites, NIST, June 18-19, 1998: A Workshop Report

March 1, 1999

Author(s)

Alamgir Karim

Control of molecular-level interactions and measurement of polymer dynamics at the filler interface were identified by participants at a recent NIST sponsored workshop as the most critical issues in filled polymers and nanocomposites. Although filled

Measurement and Standards for Computational Science and Engineering

March 1, 1999

Author(s)

Ronald F. Boisvert, J L. Blue, Daniel W. Lozier, William F. Mitchell, Roldan Pozo, Michael J. Donahue, Donald G. Porter

This report describes current work within ITL on the development of measurement and standards technology to improve the practice of computational science and engineering.

Methods for Determination of Response Times of Magnetic Head Materials

March 1, 1999

Author(s)

Thomas J. Silva, T. M. Crawford

Measurements of magnetization response times in thin-film Permalloy are made by both electrical and optical methods.

Microstructural Changes in YSZ Deposits During Annealing

March 1, 1999

Author(s)

Andrew J. Allen, J Ilavsky, Gabrielle G. Long, Jay S. Wallace, C C. Berndt, H Herman

Various methods have been applied to the microstructural characterization of thermally-sprayed depostis. However, coexisting anisotropic distributions of intra-splat cracks and interlamellar pores, and the broad size range of rounded globular pores, have

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