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Journals

Crystal Structure of Ba₂₇Fe₁₆Ti₃₃O₁₁₇

July 1, 2002

Author(s)

T Siegrist, Terrell A. Vanderah, C Svensson, Robert S. Roth

Single-crystal X-ray diffraction studies indicate that the compound Ba 27Fe 16Ti 33O 117- crystallizes in the rhombohedral space group R-3m, with a hexagonal...

Controlled Barrier Modification in Nb/NbOx/Ag Metal Insulator Metal Tunnel Diodes

June 15, 2002

Author(s)

Erich N. Grossman, Todd E. Harvey, Carl D. Reintsema

The nonlinear electrical transport properties of metal-insulator-metal (MIM) tunnel diodes based on a barrier of naturally grown niobium oxide have been...

Silicon Nanostructures Fabricated by Scanning Probe Oxidation and Tetramethyl Ammonium Hydroxide Etching

June 15, 2002

Author(s)

F S. Chien, W F. Hsieh, S Gwo, Andras Vladar, John A. Dagata

Fabrication of silicon nanostructures is a key technique for the development of monolithically integrated optoelectronic circuits. We demonstrate that the...

On the Detection of Chemically-Induced Hot Electrons in Surface Processes: From X-ray Edges to Schottky Barriers

June 14, 2002

Author(s)

John William Gadzuk

The potential involvement of electron-hole pair excitations in atomic/molecular processes such as sticking/adsorption/dissociation at metal surfaces has long...

Evaluation Methodologies for Information Management Systems

June 11, 2002

Author(s)

Emile L. Morse

The projects developed under the auspices of the Defense Advanced Research Projects Agency (DARPA) Information Management (IM) program are innovative approaches...

Self-assembled Monolayers of Methyl 1-thiahexa(ethylene oxide) for the Inhibition of Protein Adsorption

June 11, 2002

Author(s)

David J. Vanderah, Gintaras Valincius, Curtis W. Meuse

Self-assembled monolayers (SAMs) of methyl 1-thiahexa(ethylene oxide) [HS(CH 2CH 2O) 6CH 3] on gold were evaluated for their inhibition of non-specific protein...

On differential thermal analyzer curves for the melting and freezing of alloys

June 11, 2002

Author(s)

William J. Boettinger, Ursula R. Kattner

Laser-Focused Nanofabrication: Beating of Two Atomic Resonances

June 10, 2002

Author(s)

E Jurdik, K van, J Hohlfeld, T Rasing, Jabez J. McClelland

We deposit a laser-collimated chromium beam onto a substrate through a laser standing-wave (SW) tuned above the atomic resonance at either of the two 52Cr...

Effect of the Interfacial Bond Quality on the Direction of the Polymerization Shrinkage Flow in Resin Composite Restorations

June 1, 2002

Author(s)

B H. Cho, Sabine H. Dickens, J H. Bae, C G. Chang, H H. Son, C M. Um

Shrinkage in light-curing composite resin composites is assumed to be directed toward the light source. However, the strong bond at the dentin-resin interface...

Polymer Composites with High Dielectric Constant

June 1, 2002

Author(s)

C. K. Chiang, R Popielarz

A very high dielectric constant polymer composite film system is presented. The new polymer composite film uses cyanoresin polymer filled with ferroelectric...

Ceramic Based Layer Structures for Biomechanical Applications

June 1, 2002

Author(s)

Brian R. Lawn

A survey of recent advances in the analysis of ceramic-based layer structures for biomechanical applications is presented. Data on model layer systems...

Comparative Statistical Analysis of Test Parts Manufactured in Production Environments

June 1, 2002

Author(s)

David E. Gilsinn, Alice V. Ling

Estimating error uncertainties arising in parts produced on machine tools in production machine shops is not a well understood process. The current study...

Estimation of the Neutron Lifetime: Comparison of Methods Which Account for Background

June 1, 2002

Author(s)

Kevin J. Coakley, Grace L. Yang

In the first stage of each run of a neutron lifetime experiment, a magnetic trap is filled with neutrons. In the second stage of each run, neutron decay events...

Calibration of a Stopping Power Model for Silicon Based on Analysis of Neutron Depth Profiling and Secondary Ion Mass Spectrometry Measurements

June 1, 2002

Author(s)

Kevin J. Coakley, Huaiyu H. Chen-Mayer, George P. Lamaze, David S. Simons, P E. Thompson

We measure the boron concentration versus depth profile within a silicon sample with four delta-doped planes by secondary ion mass spectrometry. In a neutron...

Relationship of Dentin Shear Bond Strengths to Different Laboratory Test Designs

June 1, 2002

Author(s)

Sabine H. Dickens, M F. Milos

Purpose: To compared different 6 shear bond test procedures using 2 primers by evaluating differences in strength and fracture surfaces. Materials and Methods...

Crystal Structure of the Compound Bi₂Zn_2/3Nb_4/3O₇

June 1, 2002

Author(s)

Igor Levin, T G. Amos, J Nino, Terrell A. Vanderah, I Reaney, C A. Randall, M T. Lanagan

The crystal structure of Bi2Zn2/3Nb4/3O7 was determined using a combination of electron, X-ray and neutron powder diffraction. The compound crystallizes with a...

Materials Design of Ceramic Based Layer Structures for Crowns

June 1, 2002

Author(s)

Brian R. Lawn, Y N. Deng, Isabel K. Lloyd, E D. Rekow, Victoria Thompson

Explicit fracture mechanics relations for the onset of critical damage in crown-like ceramic layers on soft polymeric substrates subjected to contacts loads are...

Complex Polymorphic Behavior and Dielectric Properties of Perovskite-Related Sr(SR_1/3Nb_2/3)O₃

June 1, 2002

Author(s)

Igor Levin, Julia Y. Chan, J J. Scott, L Farber, Terrell A. Vanderah, James E. Maslar

The complex structural behavior of the perovskite-related compound Sr4Nb2O9 (=Sr(Sr1/3Nb2/3)O3) has been investigated using electron, X-ray, and neutron powder...

An Analytical Approximation for a Size-Broadened Profile Given by the Lognormal and Gamma Distributions

June 1, 2002

Author(s)

N Popa, Davor Balzar

We consider the size-broadened profile given by the lognormal and gamma size distributions of spherical crystallites. We show that the Voigt function and its...

On Differential Thermal Analyzer Curves for the Melting and Freezing of Alloys

June 1, 2002

Author(s)

William J. Boettinger, Ursula R. Kattner

A model for the response of differential thermal analysis measurement techniques to melting and freezing is explored. The model, which uses a system of ordinary...

Bose-Einstein Condensation in a Dilute Gas: The First 70 Years and Some Recent Experiments

June 1, 2002

Author(s)

Eric A. Cornell, C E. Wieman

Bose-Einstein condensation of dilute gases offer rich field study fundamental quantum-mechanical processes, manipulation of the speed at which light propagates...

Nonresonant Effects in One- and Two-Photon Transitions

June 1, 2002

Author(s)

U Jentschura, Peter J. Mohr

We investigate nonresonant contributions to Rayleigh scattering cross sections in atomic transitions. The problematic nonresonant contributions set a limit to...

Longitudinal Spin Waves in a Dilute Bose Gas

June 1, 2002

Author(s)

J E. Williams, T Nikuni, Charles W. Clark

We present a kinetic theory for a dilute noncondensed Bose gas of two-level atoms that predicts the transient spin segregation observed in a recent experiment...

A High-Energy X-Ray Spectrometer Diagnostic for the OMEGA Laser

June 1, 2002

Author(s)

Lawrence T. Hudson, Albert Henins, R Deslattes, J Seely, G Holland, R Atkin, L Marlin, D D. Meyerhofer, C Stoeckl

A new x-ray diagnostic has been commissioned recently at the OMEGA laser facility at the University of Rochester. It is a transmission curved crystal...

Phase-Coherent Synthesis of Optical Frequencies and Waveforms

June 1, 2002

Author(s)

Jun Ye, Steven T. Cundiff, S M. Foreman, T M. Fortier, John L. Hall, K W. Holman, D J. Jones, J D. Jost, H C. Kapteyn, K A. Leeuwen, L -. Ma, M M. Murnane, J L. Peng, R K. Shelton

Precision phase control of an ultrawide-bandwidth optical-frequency comb has produced remarkable and unexpected progress in both areas of optical-frequency...

Formation of CO in the Reaction of O Atoms with CH3: Reaction Over a Barrier but not Through a Saddle Point

June 1, 2002

Author(s)

Vadim D. Knyazev

A new type of chemical reaction characterized by a reaction path proceeding over an energy barrier (a ridge of the potential energy surface) but not through a...

High Precision Measurements of Arsenic and Phosphorous Implantation Dose in Silicon by Secondary Ion Mass Spectrometry

June 1, 2002

Author(s)

P Chi, David S. Simons, J M. McKinley, F A. Stevie, C N. Granger

The Metrology section of the 1999 International Technology Roadmap for Semiconductors specifies in-line dopant profile concentration precision requirements...

Ultra-Thin Gate Oxide Reliability: Physical Models, Statistics, and Characterization

June 1, 2002

Author(s)

John S. Suehle

The present understanding of wear-out and breakdown in ultra-thin (t ox2 gate dielectric films and issues relating to reliability projection are reviewed in...

Understanding the U.S. National Standards System

June 1, 2002

Author(s)

K J. Johnsen

This article, intended for publication in German in Germany, clarifies attributes of the U.S.standards system and its similarities and differences with European...

Calibration of a Two-Color Imaging Pyrometer and Its Use for Particle Measurements in Controlled Air Plasma Spray Experiments

June 1, 2002

Author(s)

Steven P. Mates, D Basak, Frank S. Biancaniello, Stephen D. Ridder, Jon C. Geist

Advances in digital imaging technology have enabled the development of sensors that can measure the temperature and velocity of individual spray particles over...

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