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Journals

Amphiphobic Carbon Nanotubes as Macroemulsion Surfactants

April 1, 2003

Author(s)

Haonan Wang, Erik K. Hobbie

Single-walled carbon nanotubes (SWNTs) are insoluble in either water or oil. When mixtures of SWNTs, water, and toluene are sheared rigorously, a macroscopic...

On the Origin of the Band Structure Observed in the Collision-Induced Absorption Bands of CO₂

April 1, 2003

Author(s)

Y I. Baranov, Walter J. Lafferty, Gerald T. Fraser, A A. Vigasin

A more complete analysis of the dimer structure observed on top of the collision-induced absorption bands of carbon dioxide is presented. The analysis treats...

Raman Scattering in C₆₀ and C₄₈N₁₂ Aza-Fullerene: First-Principles Study

April 1, 2003

Author(s)

R H. Xie, Garnett W. Bryant, V H. Smith

We carry out large-scale ab initio calculations of Raman scattering activity and Raman-active frequencies (RAF s) in C 48 N 12 aza-fullerene. Th results are...

Mitochondrial DNA Mutations in Patients With Myelodysplastic Syndromes

April 1, 2003

Author(s)

M G. Shin, S Kajigaya, Barbara C. Levin, N S. Young

We undertook to systematically analyze the mitochondrial genome by gene amplification and direct sequencing in 10 patients with myelodysplasia: results were...

A statistical model for cladding diameter of optical fibres

April 1, 2003

Author(s)

C. M. Wang, Timothy J. Drapela

The National Institute of Standards and Technology has developed a contact micrometer for accurate measurement of the outer diameter of optical fibres. The...

High-accuracy determination of the dependence of the photoluminescence emission energy on alloy composition in Al_xGa_1-xAs films

April 1, 2003

Author(s)

Larry Robins, J T. Armstrong, Ryna B. Marinenko, Albert J. Paul, John Pellegrino, Kristine A. Bertness

In an effort to improve the accuracy of photoluminescence (PL) measurements of the Al mole fraction (x) of Al xGa 1-xAs alloys, the PL peak emission energy, E...

Calibrated Measurement of Optoelectronic Frequency Response

April 1, 2003

Author(s)

Paul D. Hale, Dylan Williams

We describe a straightforward method for accurately measuring the frequency response of optoelectronic devices. The method uses a calibrated optical reference...

NRC - NIST Intercoparison of Calibration Systems for Current transducers with a voltage output at power frequencies.

April 1, 2003

Author(s)

Eddy So, R. Arseneau, D. Bennett, Thomas L. Nelson, Bryan C. Waltrip

Abstract - A number of international comparisons of current transformer calibrations at power frequencies were conducted in the past. However, all comparisons...

Mechanisms for the multistep spin reorientation of ultrathin Fe films on Gd

March 31, 2003

Author(s)

A P. Popov, A. V. Anisimov, David P. Pappas

The multistep spin reorientation transition of ultrathin iron films on bulk gadolinium is described theoretically. We find that it is necessary to include cubic...

Damping as a function of pulsed field amplitude and bias field in thin film Permalloy

March 31, 2003

Author(s)

John P. Nibarger, Radek Lopusnik, Thomas J. Silva

We have measured the step response in thin film Permalloy as a function of both a hard-axis pulsed field amplitude and easy-axis longitudinal magnetic bias...

Modification of Thin Film Phase Separation by a Surfactant

March 25, 2003

Author(s)

Li Piin Sung, Alamgir Karim, Jack F. Douglas, Charles C. Han

Phase separation in thin films leads to the formation of surface patterns (holes, bumps, and bicontinuous surface features) which depend on the film composition...

Decoherence of a Superconducting Qubit due to Bias Noise

March 25, 2003

Author(s)

John M. Martinis, Sae Woo Nam, Joe Aumentado, Kristine Lang, C Urbina

We calculate for the current-biased Josephson junction the decoherence of the qubit state from noise and dissipation. The effect of dissipation can be entirely...

Post-Measurement Nonlocal Gates

March 24, 2003

Author(s)

David Song

Several proposed quantum computer models include measurement processes, in order to implement nonlocal gates and create necessary entanglement resources during...

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...

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