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Journals

Thermal Decomposition of 2-Bromopropene, and 2-Chloropropene

March 24, 2003

Author(s)

K Roy, Iftikhar A. Awan, Jeffrey A. Manion, Wing Tsang

2-Chloropropene and 2-bromopropene have been decomposed in single pulse shock tube experiments. The only products under all conditions are propyne and allene...

Fundamental Noise Limitations to Supercontinuum Generation in Microstructure Fiber

March 21, 2003

Author(s)

Kristan L. Corwin, Nathan R. Newbury, J M. Dudley, S. Coen, Scott Diddams, K Weber, R Windeler

Broadband noise on supercontinuum spectra generated in microstructure fiber is shown to lead to amplitude fluctuations as large as 50% for certain input laser...

Recognizing Small Circuit Structure in Two-Qubit Operators

March 20, 2003

Author(s)

V V. Shende, Stephen Bullock, I L. Markov

This work describes numerical tests which determine whether a two-qubit quantum computation has an atypically simple quantum circuit. Specifically, we describe...

Simulating Fire Dynamics and the Thermal Response of Structural Elements

March 19, 2003

Author(s)

Kuldeep R. Prasad, Howard R. Baum

Simulations of the effects of severe fires on the structural integrity of building requires a close coupling between the gas phase energy release and transport...

Soot Inception in a Well Stirred Reactor

March 19, 2003

Author(s)

L G. Blevins, K A. Jensen, R A. Ristau, N Y. Yang, C W. Frayne, R C. Striebich, M J. DeWitt, S D. Stouffer, E J. Lee, Robert A. Fletcher, J M. Oran, Joseph M. Conny, George W. Mulholland

Soot samples collected from a well stirred reactor operating with ethylene/air equivalence ratios of 1.9, 2.0, and 2.1 were examined to determine yield, size...

Arabidopsis Thaliana Ogg1 Protein Excises 8-Hydroxyguanine and 2,6- Diamino-4-hydroxy-5-formamidopyrimidine from Oxidative Damaged DNA Containing Multiple Lesions

March 18, 2003

Author(s)

T Morales-Ruiz, M Birincioglu, Pawel Jaruga, H Rodriguez, T. Roldan-Arjona, Miral M. Dizdar

A functional homologue of eukaryotic Ogg1 proteins in the model plant Arabidopsis thaliana has recently been cloned, isolated, and characterized [Garcia-Ortiz...

X-Ray Diffraction Patterns of Two Germanium Clathrates, Sr8Ga16Ge30 and Cs8Na16Ge136: Promising Materials for Thermoelectric Applications

March 18, 2003

Author(s)

James A. Kaduk, Winnie Wong-Ng, George S. Nolas

Position and Temperature Dependence of Pyroelectricity in Domain-Engineered Stoichiometric and Congruent LiTaO₃

March 15, 2003

Author(s)

John H. Lehman, Chris Pannell

Domain-engineered bicell (parallel compensated) pyroelectric detectors were constructed from stoichiometric and congruent lithium tantalate. The variation of...

Current-Induced Spin-Wave Excitations in a Single Ferromagnetic Layer

March 14, 2003

Author(s)

Yi Ji, C Chien, Mark D. Stiles

Evidence for a current induced spin-transfer torque effect has been investigated in a series of point contacts to single ferromagnetic layers. At specific...

Temperature-Controlled MEMS Chemical Microsensors

March 13, 2003

Author(s)

Stephen Semancik, Richard E. Cavicchi, Douglas C. Meier, C J. Taylor, N O. Savage, M C. Wheeler

This paper describes MEMS microheater structures that have been employed in the development of chemical (gas) microsensors and other microanalytical components...

Separating Signal From Noise in Global Warming

March 12, 2003

Author(s)

Bert W. Rust

One argument often used against global warming is that the global temperature record is too noisy to allow a clear determination of the signal. This paper...

Nonlinear magnetooptic measurement of flux propagation dynamics in thin Permalloy films

March 12, 2003

Author(s)

Thomas J. Silva, Matthew Pufall, Pavel Kabos

Time-resolved nonlinear optics are used to study the propagation of magnetic flux pulses in a 250 nm Permalloy film. The flux is generated in the film by...

A New Standard Reference Material for Column Evaluation in Reversed-Phase Chromatography

March 10, 2003

Author(s)

Lane C. Sander, Stephen A. Wise

A Capacitance-Voltage Model for Polysilicon-Gated MOS Devices Including Substrate Quantization Effects Based on Modification of the Total Semiconductor Charge

March 10, 2003

Author(s)

Eric M. Vogel, Curt A. Richter, Brian G. Rennex

We present a model for simulating the capacitance-voltage characteristics of polysilicon-gated MOS devices with thin oxides. The model includes substrate...

Additive Concentration Effects on Enantioselective Separations in Supercritical Fluid Chromatography

March 5, 2003

Author(s)

Karen W. Phinney, Lane C. Sander

Polar additive concentration effects in supercritical fluid chromatography were studied on two chiral stationary phases, Chirobiotic V and Chiralpak AD. Two...

Thin Films of Collagen Affect Smooth Muscle Cell Morphology

March 4, 2003

Author(s)

John T. Elliott, Alessandro Tona, John T. Woodward IV, P L. Jones, Anne L. Plant

The purpose of this study was to provide a reproducible method for applying collagen to surfaces on which cells can be grown, and to characterize the resulting...

An Application of MALDI-MS and Reactive Molecular Dynamics in Determining the Mechanisms of Char-Formation During the Thermal and Oxidative Degradation of Polymers

March 3, 2003

Author(s)

Marc R. Nyden, William E. Wallace, W H. Awad

The mechanisms by which polymers form carbonaceous chars as a result of thermal and oxidative degradation is an interesting scientific problem, which has...

First Principles Based Calculations of the CaCO₃ - MgCO₃ and CdCO₃-MgCO₃ Subsolidus Phase Diagrams

March 1, 2003

Author(s)

Benjamin P. Burton, A Van de Walle

Planewave pseudopotential calculations of formation energies for several ordered supercells were used as bases for first principles calculations of the CaCO3 -...

Interaction of GroEL and GroEL/GroES complexes with a nonnative subtilisin variant: a small-angle neutron scattering study

March 1, 2003

Author(s)

Susan T. Krueger, Susan K. Gregurick, J. Zondlo, Edward Eisenstein

Enantioselective Separations in Capillary Electrophoresis with Dextran Sulfate as the Chiral Selector

March 1, 2003

Author(s)

Karen W. Phinney, Lane C. Sander

Effect of Caged Fluorescent Dye on the Electroosmotic Mobility in Microchannels

March 1, 2003

Author(s)

David J. Ross, Laurie E. Locascio

We report on measurements of electroosmotic mobility in polymer microchannels and silica capillaries with and without the addition of a caged fluorescein dye to...

Determination of Methyl-Substituted Polycyclic Aromatic Hydrocarbons in Diesel Particulate-Related Standard Reference Materials

March 1, 2003

Author(s)

Dianne L. Poster, Bruce A. Benner Jr, Michele M. Schantz, Lane C. Sander, Stephen A. Wise, M. G. Vangel

Development and Analysis of Three Diesel Particulate-Related Standard Reference Materials for the Determination of Chemical, Physical, and Biological Characteristics

March 1, 2003

Author(s)

Dianne L. Poster, M. J. Lopez de Alda, Michele M. Schantz, Lane C. Sander, Stephen A. Wise, M. G. Vangel

Biometric Standards -- A Key to a More Secure World

March 1, 2003

Author(s)

Michael D. Hogan, Fernando L. Podio

Biometric technologies are becoming the foundation of an array of highly secure identification and verification solutions. Over the past eighteen months, the U...

Estimation of Q-Factors and Resonant Frequencies

March 1, 2003

Author(s)

Kevin J. Coakley, Jolene D. Splett, Michael D. Janezic, R F. Kaiser

We estimate the quality factor Q and resonant frequency f o of a microwave cavity based on resonance curve observations on an equally-spaced frequency grid. The...

Spotlight - Biometric Authentication -- Are You Who You Claim To Be?

March 1, 2003

Author(s)

Michael D. Hogan

The recent establishment of the International Organization for Standardization/International Electrotechnical Commission Joint Technical Committee 1/Subcomittee...

Accuracy of Nanoscale Pitch Standards Fabricated by Laser-Focused Atomic Deposition

March 1, 2003

Author(s)

Jabez McClelland, W Anderson, C Bradley, M Walkiewicz, R Deslattes, E Jurdik, Robert Celotta

The pitch accuracy of a grating formed by laser-focused atomic deposition is evaluated from the point of view of fabricating nanoscale pitch standard artifacts...

R&D Investment Trends: U.S. Needs More High-Tech

March 1, 2003

Author(s)

Gregory C. Tassey

A varied set of barriers inhibit approaching some optimum for R&D investment. Among them is the fact that the majority of R&D is still performed in the...

Analysis of Performance Variation Using Query Expansion

March 1, 2003

Author(s)

Alan Smeaton

Information retrieval performance evaluation is commonly made based on the classical recall and precision based figures or graphs. However, important...

Change Detection In XML Documents

March 1, 2003

Author(s)

K H. Lee, Y C. Choy, S B. Cho, Xiao Tang, V R. McCrary

This paper presents an efficient algorithm to detect changes between old and new versions of an XML document. The difference between the two versions can be...

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