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Journals

Model for Exchange Bias in Polycrystalline Ferromagnet-Antiferromagnet Bilayers

February 1, 1999

Author(s)

Mark D. Stiles, Robert D. McMichael

Polycrystalline ferromagnet-antiferromagnet bilayers exhibit a wide range of interesting magnetic effects. This paper describes a model for these bilayers which

NIST's support of rapid prototyping standards

February 1, 1999

Author(s)

Kevin K. Jurrens

Recent activities and interactions with industry have suggested to the National Institute of Standards and Technology (NIST) that formal standards for rapid

Approximating the Permanent via Importance Sampling With Application to the Dimer Covering Problem

February 1, 1999

Author(s)

Isabel M. Beichl, F Sullivan

We estimate the asymptotic growth rate of the number of dimer covers of cubic lattice. Our estimate λ 3 = 0.4466 {plus or minus} 0.0006 is consistent with the

The Palladium-Zirconium Phase Diagram

February 1, 1999

Author(s)

Richard M. Waterstrat, Alexander J. Shapiro, A Jeremie

The palladium-zirconium phase diagram has been re-investigated over its entire composition range. The revised diagram includes two intermediate phases. Pd 4Zr 3

Ultrasonic Measurement of Stress in Railroad Wheels

February 1, 1999

Author(s)

R E. Schramm

Acoustic birefringence is the relative change in sound velocity with polarized direction. While the effect is small (usually parts in 10 4), this is a useful

Dislocation-Density Changes Upon Poling of Polycrystalline BaTiO₃

February 1, 1999

Author(s)

Davor Balzar, H M. Ledbetter, P W. Stephens, E T. Park, J L. Routbort

We report evidence for a significant increase of bulk dilocation density upon poling of polycrystalline BaTiO 3. The synchrotron high-resolution x-ray

Voight Function Model in Diffraction-Line Broadening Analysis

February 1, 1999

Author(s)

Davor Balzar

Diffraction-line broadening routes are briefly reviewed. Both luboratory and synchrotron X-ray measurements of W and MgO showed that a Voigt function

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

February 1, 1999

Author(s)

S Jahanmir

Newsletter, Ceramic Measures: News of the Ceramic Processing Characterization Consortium, February 1999, Vol. 3, Issue 1.

Coherent Splitting of Bose-Einstein Condensed Atoms With Optically Induced Bragg Diffraction

February 1, 1999

Author(s)

M M. Kozuma, Lu Deng, Edward W. Hagley, J Wen, R Lutwak, Kristian Helmerson, S L. Rolston, William D. Phillips

We exposed Bose-Einstein condensed sodium atoms to a traveling periodic optical potential and observed coherent splitting of the condensate due to Bragg

A Molecular Dynamics Study of a Reversed-Phase Liquid Chromatography Model

February 1, 1999

Author(s)

J T. Slusher, Raymond D. Mountain

We describe a molecular dynamics simulation study of a model of the reverse-phase chromatographic system. The model consists of a slab of aqueous solvent

Enthalpy Increment Measurements from 4.5 K to 350 K and the Thermodynamic Properties of the Titanium Silicide TiSi(cr)

February 1, 1999

Author(s)

Donald G. Archer, R J. Kematick, C E. Myers, A Agarwal, E J. Cotts

Enthalpy increments for TiSi(cr) were measured from 4.5 K to 350 K with an adiabatic calorimeter. A small anomaly, unknown origin, was detected between 5K and

Structure and Spectroscopy of Metallo-Lactamase Active Sites

February 1, 1999

Author(s)

H S. Gilson, Morris Krauss

This study clarifies the relationship between the active-site geometry of the bimetallic enzyme, zinc-Β-lactamase, and the electronic spectra of the cobalt

Mitochondrial Disease in Superoxide Dismutase 2 Mutant Mice

February 1, 1999

Author(s)

S Melov, P Coskun, M Patel, R Tuinstra, B Cottrell, A S. Jun, T H. Zastawny, M. Dizdaroglu, S I. Goodman, T Huang, H Miziorko, C J. Epstein, D C. Wallace

Oxidative stress has been implicated in many diseases. The chief source of reactive oxygen species (ROS) within the cell is the mitochondrion. We have

Ab Initio Determination of the Structure of the Active Site of a Metalloenzyme: Metal Substitution in Phospotriesterase using Density Functional Methods

February 1, 1999

Author(s)

S A. Kafafi, Morris Krauss

A number of previous studies have determined that a metalloenzyme active site is inherently determined by the ligands and metal and only weakly perturbed by the

Low Energy, Ion-Induced Electron and Ion Emission from Stainless Steel: The Effect of Oxygen Coverage and the Implications for Discharge Modeling

February 1, 1999

Author(s)

S. G. Walton, J. C. Tucek, R. Champion, Yicheng Wang

Absolute yields of electrons and negative ions resulting from positive ions impacting stainless steel have been determined as a function of impact energy for

Experimental Study of the NaK (3 1PI) State

February 1, 1999

Author(s)

E Laub, J Huennekens, R K. Namiotka, Zeina J. Kubarych, I Prodan, J La civita, S Webb, I Mazsa

We report the results of an optical-optical double resonance experiment to determine the NaK (3 1PI) state potential energy curve. In the first step, a narrow

Logarithmic SUMT Limits in Convex Programming

February 1, 1999

Author(s)

G P. McCormick, Christoph J. Witzgall

The limits of a class of primal and dual solution trajectories associated with the Sequential Unconstrained Minimization Technique (SUMT) are investigated for

For 100 Years, Notched Bar Impact Testing Standards Have Yielded Widespread Benefits for Industry

February 1, 1999

Author(s)

M P. Manahan, Christopher N. McCowan, Thomas A. Siewert, J M. Holt

Without Standardization, the impact test has little meaning.

Electron-Impact Total Ionization Cross Sections of CF₄, C₂F₆, and C₃F₈

February 1, 1999

Author(s)

H Nishimura, W M. Huo, M A. Ali, Yong Sik Kim

Both theoretical and experimental electron-impact total ionization cross sections of CF 4, C 2F 6, and C 3F 8 are presented. The experimental cross sections

Preparing Spectral Libraries of Chloroplast Components for a Raman Imaging and Microspectroscopy Study

January 30, 1999

Author(s)

B M. Allen, Anne L. Plant, E N. Lewis, P Colarusso

Raman imaging is a non-invasive vibrational spectroscopic technique that utilizes both Raman spectroscopy and optical microscopy. This technique allows one to

Wear Induced Molecular Orientation in Ultra High Molecular Weight Polyethylene (UHMWPE) Measured by Soft X-Ray Adsorption

January 29, 1999

Author(s)

Daniel A. Fischer, S Sambasivan, M C. Shen, Stephen M. Hsu

Molecular orientation in ultra high molecular weight polyethylene (UHMWPE) when it is subjected to wear is important in understanding the basic wear processes

The Use of Cyclic Phosphazene Additives to Enhance the Performance of the Head/Disk Interface

January 29, 1999

Author(s)

H J. Kang, Q Zhao, F E. Talke, D J. Perettie, B M. DeKoven, T A. Morgan, Daniel A. Fischer, Stephen M. Hsu, C S. Bhatia

Phase separation of phosphazene additives in perfluoropolyalkylether (PFPAE) lubricants is investigated as a function of additive concentration and lubricant

The Strength of Solvent-Exposed Salt Bridges

January 28, 1999

Author(s)

R Luo, L David, H Hung, J Devaney, M K. Gilson

Effects of Wear Motion on Ultra High Molecular Weight Polyethylene (HMWPE) Molecular Orientation

January 28, 1999

Author(s)

S Sambasivan, Daniel A. Fischer, M C. Shen, Stephen M. Hsu

In a human hip joint, the motion is complex and consists of flexion/extension, abduction, and adduction. Laboratory studies have shown that these motions

User Evaluation of Automatically Generated Semantic Hypertext Links in a Heavily Used Precedural Manual

January 18, 1999

Author(s)

John M. Tebbutt

This paper is an interim report on our efforts at NIST to construct an information discovery tool through the fusion of Hypertext and Information Retrieval (IR)

Simple Empirical Cluster Expansion Hamiltonians for Modeling Cation Order-Disorder in A(B'^d1/3B2/3)O3 Perovskites Such as Pb(Mg1/3Nb2/3)O3

January 15, 1999

Author(s)

Benjamin P. Burton

Brute force exploration of the simple cubic effective cluster interaction space indicates that linear triplet interaction is both necessary and sufficient to

Logarithmic Convexity and the 'Slow Evolution' Constraint in Ill-Posed Initial Value Problems

January 15, 1999

Author(s)

Alfred S. Carasso

This paper examines a wide class of ill-posed initial value problems for partial differential equations, and surveys logarithmic convexity results leading to

On The Reversion of an Asymptotic Expansion and the Zeros of the Airy Functions

January 15, 1999

Author(s)

Bruce R. Fabijonas, Frank W. Olver

The general theories of the derivation of inverses of functions from their power series and asymptotic expansions are discussed and compared. The asymptotic

On the Distribution of the Limit of Products of I.I.D 2 x 2 Random Stochastic Matrices

January 15, 1999

Author(s)

A Mukherjea, Anastase Nakassis, J S. Ratti

This article extends the results of [3] by establishing sufficient conditions for the limit distribution of products of i.i.d. 2 x 2 random stochastic matrices

Effect of Film Composition on the Orientation of (Ba,Sr)TiO₃ Grains in (Ba,Sr)_yTiO_2+y Thin Films

January 12, 1999

Author(s)

Debra L. Kaiser, Mark D. Vaudin, L D. Rotter, John E. Bonevich, J T. Armstrong

(Ba,Sr) yTiO 2+y thin films with 0.34 {1-xSr xTiO 3 (x {aproximately equal to} 0.06) and an amorphous phase. The orientation of the tetragonal Ba 1-xSr xTiO 3

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