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Journals

An AC Josephson Source for Johnson Noise Thermometry

April 1, 2003

Author(s)

Samuel Benz, John M. Martinis, Paul Dresselhaus, Sae Woo Nam

We have adapted the Josephson arbitrary waveform synthesizer to create a quantized voltage noise source suitable for calibrating the cross-correlation...

Johnson Noise Thermometry Measurements Using a Quantized Voltage Noise Source for Calibration

April 1, 2003

Author(s)

Sae Woo Nam, Samuel Benz, Paul Dresselhaus, Weston L. Tew, David R. White, John M. Martinis

We describe a new approach to Johnson Noise Thermometry(JNT) that takes advantage of recent advances in Josephson voltage standards and digital signal...

AC Josephson Voltage Standard Error Measurements and Analysis

April 1, 2003

Author(s)

Charles J. Burroughs, Samuel Benz, Paul Dresselhaus

The Josephson arbitrary waveform synthesizer can be used as a precision voltage source for both ac and dc signals. Recent improvements in circuit designs have...

Optical Frequency Standards Based on the ¹⁹⁹Hg⁺ Ion

April 1, 2003

Author(s)

U Tanaka, James C. Bergquist, S Bize, Scott Diddams, Robert E. Drullinger, Leo W. Hollberg, Wayne M. Itano, C E. Tanner, David J. Wineland

Combining Magnets and Dielectrics: Crystal Chemistry in the BaO-Fe₂O₃-TiO₂ System

April 1, 2003

Author(s)

T Siegrist, Terrell A. Vanderah

Phases observed in the Ba-Fe-Ti-O system are classified and described within the framework of close packed [O,Ba/O] layers, with the transition metals in either...

Direct Observation of Remanent Magnetic States in Epitaxial fcc Co Small Disks

April 1, 2003

Author(s)

C Vaz, L Lopez-Diaz, M Klaui, J Bland, T Monchesky, John Unguris, Z Cui

The magnetic nanostructure of epitaxial fcc Co/Cu(001) circular elements (1.7υm in diameter) has been imaged with scanning electron microscopy with polarization...

Characterization of Binary Josephson Series Arrays of Different Types at BNM-LNE and Comparisons with Conventional SIS Arrays

April 1, 2003

Author(s)

Jean-Pierre Lo-Hive, Sophie Djordjevic, Phillippe Cancela, Francois P. Piquemal, Ralf Behr, Charles J. Burroughs, H. Seppa

Three 1-V binary Josephson arrays developed by the NIST, the PTB, and the VTT, and using, respectively, superconductor-normal metal-superconductor (SNS)...

A New Octahedral Tilt System in the Perovskite Phase Ca₃Nb₂O₈

April 1, 2003

Author(s)

L M. Cranswick, W G. Mumme, I E. Grey, Robert S. Roth, P Bordet

The perovskite-related phase Ca 3Nb 2O 8, when grown as single crystals from a calcium vanadate flux, incorporates a smallamount of vanadium from the flux to...

Metallurgical Analysis of Wrought Iron From the RMS Titanic

April 1, 2003

Author(s)

J J. Hooper, Timothy J. Foecke, L Graham, Timothy P. Weihs

The discovery of the RMS Titanic has led to a number of scientific studies, one of which addresses the role that structural materials played in the sinking of...

Singular Grain Boundaries in Alumina and Their Roughening Transition

April 1, 2003

Author(s)

C W. Park, D C. Yoon, J Blendell, C A. Handwerker

The shapes and structures of grain boundaries formed between the basal (0001) surface of large alumina grains and randomly oriented small alumina grains are...

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

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