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Displaying 41951 - 41975 of 73963

Enterprise Access Control Frameworks Using RBAC and XML Technologies

January 1, 2003
Author(s)
Ramaswamy Chandramouli
In this chapter, we show that we can develop an Enterprise Access Control Framework using Role-based Access Control (RBAC) and Extensible Markup Language (XML) technologies. In the first section, we outline the general requirements for the Enterprise

Estimation of Neutron Mean Wavelength From Rocking Curve Data

January 1, 2003
Author(s)
Kevin J. Coakley, Z Chowdhuri, W M. Snow, J M. Richardson, Maynard S. Dewey
At NIST, an in-beam neutron lifetime experiment is underway. In part of the experiment, a neutron detector is calibrated. The accuracy of the detector calibration depends, in part, on how accurately the mean wavelength of a neutron beam can be estimated

Experimental demonstration of robust, high-fidelity geometric two ion-qubit phase gate

January 1, 2003
Author(s)
Dietrich G. Leibfried, B. L. DeMarco, V Meyer, D Lucas, Murray D. Barrett, Joseph W. Britton, Wayne M. Itano, Branislav M. Jelenkovic, Christopher Langer, Till P. Rosenband, David J. Wineland
Universal logic gates for two quantum bits (qubits) form an essential ingredient of quantum computation. Dynamical gates have been proposed in the context of trapped ions; however, geometric phase gates (which change only the phase of the physical qubits)

Experimental Studies of Peptide Bonds: Identification of the C 7 eq Conformation of the Alanine Dipeptide Analog N-Acetyl-Alanine N'-Methylamide From Torsion-Rotation Interactions

January 1, 2003
Author(s)
R J. Lavrich, David F. Plusquellic, R D. Suenram, Gerald T. Fraser, Angela R. Hight Walker, M J. Tubergen
Rotational spectra of the bio-mimetic molecule, alanine dipepitide and the double 15N( 15N 2) isotopomer have been observed using a pulsed-molecular-beam Fourier transform microwave spectrometer. The spectra reveal large tunneling splittings from the

Extinction Characteristics of Cup-Burner Flame in Microgravity

January 1, 2003
Author(s)
V Katta, F Takahashi, Gregory T. Linteris
Carbon dioxide extinguishes flames through dilution process. The extinction characteristics of CO2 were previously studied using a cup-burner flame under normal-gravity conditions. As the diffusion flames behave differently in microgravity compared to

Final Report on the Key Comparison CCM.P-K5 in Differential Pressure From 1 Pa to 1000 Pa

January 1, 2003
Author(s)
A P. Miiller, G Cignolo, M P. Fitzgerald, M P. Perkin, M Sardi, Philip A. Simpson
This report describes a CCM key comparison of low differential-pressure standards at four National Measurement Institutes (NMIs) that was carried out during the period July 1998 to May 1999 in order to determine their degrees of equivalance at pressures in
Displaying 41951 - 41975 of 73963
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