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Displaying 41426 - 41450 of 73970

Traction-Free Vibrations of Finite Trigonal Elastic Cylinders

April 1, 2003
Author(s)
Paul R. Heyliger, Ward L. Johnson
The unrestrained, traction-free vibrations of finite elastic cylinders with trigonal material symmetry are studied using two approaches, based on the Ritz method, which formulate the weak form of the equations of motion in cylindrical and retangular

Ultrasonic Evaluation Methods Applicable to Polymer Concrete Composites

April 1, 2003
Author(s)
A Garbacz, Edward Garboczi
Polymer composites (PC) appear as useful materials for repair and protection of building structures, as well as for manufacturing pre-cast elements. In the case of pre-cast elements as well as repair materials, the usefulness and durability of polymer

Wind Speeds in ASCE 7 Standard Peak-Gust Map: Assessment

April 1, 2003
Author(s)
Emil Simiu, R Wilcox, Fahim Sadek, James J. Filliben
The ASCE 7 peak-gust map division of the conterminous United States into two adjacent wind speed zones does not reflect correctly the country's differentiated extreme wind climate. The methodology used to develop the map averages out real climatological

Wind Speeds in the ASCE 7 Standard Peak-Gust Map: An Assessment

April 1, 2003
Author(s)
Emil Simiu, R Wilcox, Fahim Sadek, James J. Filliben
The ASCE 7 peak-gust map division of the conterminous United States into two adjacent wind speed zones does not reflect correctly the country's differentiated extreme wind climate. The methodology used to develop the map averages out real climatological

XML for Capital Facilities

April 1, 2003
Author(s)
T L. Teague, Mark E. Palmer, R H. Jackson
Extensible Markup Language (XML) offers a promising enabling technology for improving the execution of capital projects and capital facility life cycle data management. XML provides the most value when industry practitioners agree to use a common

XML for Exchange of Weld Inspection Results

April 1, 2003
Author(s)
William G. Rippey, Timothy P. Quinn, John L. Michaloski
TECHNICAL SUMMARYIntroduction/Background SectionA system to demonstrate the transfer of weld inspection data between computer programs is described in this paper. The goal is effortless flow of the data between multi-vendor welding software applications

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 terms in the magnetic anisotropy energy expansion in order to explain this phenomenon

Metrology for Molecular Electronics

March 31, 2003
Author(s)
Curt A. Richter, D R. Stewart
We discuss some of the complex issues associated with the metrology of molecular electronic devices and describe an electrical characterization method to assess molecular crossbar devices. Experimental data is shown for an eicosanoic acid crossbar device

Relative Permittivity and Refractive Index

March 28, 2003
Author(s)
Michael R. Moldover, K N. Marsh, J M. Barthel, R Buchner
Measurements of the relative electric permittivity (dielectric constant or relative permittivity) e(p,T) and refractive index of fluids n(p,T) as a function of the pressure and the temperature can be used to determine a wide range of thermodynamic

Security for Wireless Networks and Devices

March 27, 2003
Author(s)
Shirley M. Radack
This ITL Bulletin summarizes NIST Special Publication (SP) 800-48, Wireless Network Security, 802.11, Bluetooth, and Handheld Devices. Written by Tom Karygiannis and Les Owens. NIST SP 800-48 provides recommendations to improve the security of wireless

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 accounted for through a noise model of the current bias that appropriately includes the effect

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. These features are interpreted to arise from surface tension variations within the film that

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 the computation. We introduce a scheme in which the measurements can be delayed for two- and

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. The high pressure rate expressions arek(2-BrC 3H 5 => propyne/allene + HBr) =10 14.12 exp(-3283OK

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 pulse parameters. We study this noise using both experimental measurements and numerical

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 forumulae, written in terms of matrix coefficients, characterizing operators implementable with

Smaller Two-Qubit Circuits for Quantum Communication and Computation

March 20, 2003
Author(s)
V V. Shende, I L. Markov, Stephen Bullock
We show how to implement an arbitrary two-qubit unitary operation using any of several quantum gate libraries with small a priori upper bounds on gate counts.Using quantum circuit identities, we improve an earlier lower bound of 17 elementary gates by

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 phenomena and the stress analysis in the load bearing materials. The connection between the two

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 distribution, morphology, and composition. For F = 1.9, particles are absent. For F = 2.0 and 2.1

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, M.V., Ariza, R.R., and Roldan-Arjona, T. (2001) Plant Mol. Biol. 47, 795-804]. This enzyme
Displaying 41426 - 41450 of 73970
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