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Conferences

Temperature Shift Factors for the Segmental Relaxation of Polycarbonate Below the Glass Transition

May 1, 1998

Author(s)

P A. O'Connell, G B. McKenna

Data are presented on the stress relaxation response of a polycarbonate under torsional load. Tests were performed for times long enough to attain the...

Cure, Shrinkage and Properties of an Epoxy Material

May 1, 1998

Author(s)

O Sindt, S L. Simon, G B. McKenna, E Liang

This work focuses on obtaining data to perform realistic finite element models of residual stresses in composite parts made of toughened epoxy thermosets. The...

A Nonlinear Fluid Standard Reference Material: Progress Report

May 1, 1998

Author(s)

Carl R. Schultesiz, G B. McKenna

NIST is in the process of developing a new Standard Reference Material that replaces the previous SRM 1490 Nonlinear Fluid Standard. The purpose of the material...

Trapped Ions, Entanglement, and Quantum Computing

May 1, 1998

Author(s)

C J. Myatt, B E. King, D Kielpinski, Dietrich Leibfried, C S. Turchette, Chris S. Wood, Wayne M. Itano, C Monroe, David J. Wineland

A miniature, elliptical ring rf (Paul) ion trap has been used in recent experiments toward realizing a quantum computer in a trapped ion system. With the...

Error Bars in Intensity and Phase Measurements of Ultrashort Laser Pulses

May 1, 1998

Author(s)

M. J. Munroe, David H. Christensen, R. Trebino

A Federal Public Key Infrastructure With Multiple Digital Signature Algorithms

April 22, 1998

Author(s)

William E. Burr, William T. Polk

Several digital algorithms are coming into general use. A certificate containing a key for one algorithm can be signed with a different algorithm. This paper...

NIST/NBS Fire Research and FRCA: 25 Years of Progress

April 16, 1998

Author(s)

Richard G. Gann

The National Bureau of Standards' Center for Fire Research and the Fire Retardant Chemicals Association were formed within a year of each other. The former has...

Critical Compilation of Atomic Wavelength and Energy Level Data

April 3, 1998

Author(s)

William C. Martin, J Sugar, Arlene Musgrove, Craig J. Sansonetti, Jean E. Sansonetti, Edward B. Saloman, V I. Azarov, Alexander Kramida, A N. Ryabsev, T Shirai

Automation Infrastructure System for a Robotic 30-Ton Bridge Crane

April 1, 1998

Author(s)

William C. Stone, L E. Pfeffer

This paper describes the sensing portion of a system used to convert an existing 30-ton high bay bridge crane to computer control for automated placement of...

The Microstructure of Portland Cement-Based Materials: Computer Simulation and Percolation Theory

April 1, 1998

Author(s)

Edward J. Garboczi, Dale P. Bentz

Cement-based materials are usually composites, where the matrix consists of cement paste. Cement paste is a material formed from the hydration reaction of...

An Overview of the IEEE P1451 -- A Family of Proposed Smart Transducer Interface standards

April 1, 1998

Author(s)

Kang B. Lee

Sensors are used in a broad range of applications, from machinery condition monitoring and industrial automation to patient condition monitoring in hospitals...

Critical Compilation of Atomic Wavelength and Energy Level Data,

April 1, 1998

Author(s)

William C. Martin

Advanced MMI/MP for Demo III XUVs

April 1, 1998

Author(s)

Stephen B. Balakirsky, M J. Salonish, S D. Allen, Elena R. Messina, J Salinas

This paper outlines the goals and work accomplished thus far for both the man-machine interface (MMI) and mission planning (MP) elements of the eXperimental...

Anisotropic Microstructure of Plasma-Sprayed Deposits

April 1, 1998

Author(s)

J Ilavsky, Gabrielle G. Long, Andrew J. Allen, L Leblanc, M Prystay, C Moreau, Alan H. Band

The microstructure of plasma-sprayed deposits [PSD] is dominated by two void systems-interlamellar pores and intralamellar cracks - each with a different...

Careers in Government: Bench Scientist to Policy Wonk

April 1, 1998

Author(s)

K B. Gebbie

The U.S. system for graduate education in physics is arguably the most effective system yet devised for advanced training in physics. Focused as it is on...

Critical Compilation of Atomic Wavelength and Energy Level Data

April 1, 1998

Author(s)

William C. Martin, J Sugar, Arlene Musgrove, Craig J. Sansonetti, Jean E. Sansonetti, Edward B. Saloman, V I. Azarov, Alexander Kramida, A N. Ryabtsev, T Shirai

The Atomic Energy Levels Data Center at the National Institute of Standards and Technology (NIST), in cooperation with other laboratories indicated above, is...

Wavelengths and Oscillator Strengths for Space Astronomy

April 1, 1998

Author(s)

Craig J. Sansonetti, Joseph Reader

Over a period of more than a decade the Atomic Spectroscopy Group at NIST has carried out laboratory research to support the observing program of the Hubble...

RTP Calibration Wafer Using Thin-Film Thermocouples

April 1, 1998

Author(s)

Kenneth G. Kreider, D P. DeWitt, Benjamin K. Tsai, Francis J. Lovas, David W. Allen

Rapid thermal processing (RTP) is a key technology for the cluster tool, single wafer manufacturing approach that is used to produce integrated circuits at...

A Novel Method to Determine the Mechanical Properties of Ultra-Thin Films

April 1, 1998

Author(s)

Christopher C. White, Wen-Li Wu

Recent experimental results based on x-ray reflectivity, ellipsometry and positron annihilation spectroscopy, etc. have demonstrated that physical properties of...

X-Ray Diffraction Topography of Sapphire for Windows and Domes

March 30, 1998

Author(s)

David R. Black

X-ray diffraction topography has been used as a nondestructive characterization tool to investigate single-crystal sapphire for window and dome applications. A...

A Method for Calibrating Ultrasonic Aluminum Reference Blocks with Nominally-Identical Ceramic-Element Transducers

March 27, 1998

Author(s)

John A. Slotwinski, Steven E. Fick, G V. Sydnor, Ana Lopez-Sanchez, Gerald V. Blessing

Ceramic-element transducers have been used successfully to calibrate aluminum flat-bottom-hole (FBH) reference blocks according to the American Society for...

Network Security Testing Using Mobile Agents

March 25, 1998

Author(s)

Athanasios T. Karygiannis

This paper describes a prototype security testing tool that is currently under development at NIST. This prototype tool uses autonomous mobile agents to perform...

Properties of Process Gases Determined Accurately with Acoustic Techniques

March 23, 1998

Author(s)

John J. Hurly

Pb-Distribution in a Five-Phase (Bi, Pd)-Sr-Ca-Cu-O Assemblage

March 12, 1998

Author(s)

Lawrence P. Cook, Winnie K. Wong-Ng

The partitioning of lead between phases in the nominal five-phase assemblage: (Pb,Bi) 3Sr 2Ca 2CuO x + (Ca,Sr) 2PbO 4 + (Bi,Pb) 2Sr 2CaCu 2O x + (Ca,Sr)O +...

Cement Hydration in the Presence of Municipal Solid Waste Incineration Fly Ash.

March 5, 1998

Author(s)

Dale P. Bentz, S Remond, P Pimienta, J P. Bournazel

Incorporating wastes into concrete on an appropriately selective basis could help to solve some of the problems encountered in waste management. Some industrial...

Modeling of Multi-Step Nonlinear Stress Relaxation in DGEBA/M-PDA Epoxy Resins

March 4, 1998

Author(s)

Gale A. Holmes, R C. Peterson, Donald L. Hunston

Multi-step stress relaxation data from a DGEBA/m-PDA epoxy resin is modeled using a nonseparable nonlinear constitutive equation. The form of the equation is...

On the Bifurcation from Continuous to Segmented Chip Formation in Metal Cutting

March 4, 1998

Author(s)

Timothy J. Burns, Christopher J. Evans, Matthew A. Davies

We describe a new approach to modeling chip formation in orthogonal machining. Metal cutting is interpreted as a nonlinear dynamical process with...

Interconnection Continuity Test for Packaged Functional Modules

March 3, 1998

Author(s)

Jan Obrzut

We developed an electrical test to evaluate interconnections in packaged, electrostatic-discharge (ESD) protected modules. The ESD protection circuit, which in...

Accurate Size Measurement of Monosize Calibration Spheres by Differential Mobility Analysis

March 1, 1998

Author(s)

George W. Mulholland, Marco G. Fernandez

A differential mobility analyzer was used to measure the mean particle size of three monosize suspensions of polystyrene spheres in water. Key features of the...

Cement Hydration in the Presence of Municipal Solid Waste Incineration of Fly Ash

March 1, 1998

Author(s)

S J. Remond, Dale P. Bentz, M. Pimpinella, J P. Bournazel

This study is part of a wider research program aimed at developing an assessment methodology of waste-containing concrete. This methodology is developed based...

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