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Displaying 38901 - 38925 of 73461

Dynamics of Proton Transfer in Bacteriorhodopsin

February 25, 2004
Author(s)
Y. S. Lee, Morris Krauss
Proton transfer from the cyctoplasm to the extracellular side is initiated from protonated asp96 in the cytoplasmic region towards the deprotonated Schiff base. This occurs in the transition from the late M photocycle state to the N state. A quantum

Micellar Affinity Gradient Focusing

February 25, 2004
Author(s)
K M. Balss, P B. Howell, David J. Ross
This report describes a novel method for the concentration and separation of neutral and/or hydrophobic analytes based on a combination of the analytes partitioning into a micellar phase and their electrophoretic mobility. This method of simultaneous

Semiconductor Factory and Equipment Time Synchronization

February 25, 2004
Author(s)
Ya-Shian Li-Baboud, Brad Van Eck
With the advent of e-manufacturing including automated process control (APC), such as fault detection classification (FDC), more stringent accuracy requirements for time stamps are required to perform analysis intended for process and business critical

Current quantization due to single-electron transfer in Si-wire charge-coupled devices

February 23, 2004
Author(s)
Akira Fujiwara, Neil M. Zimmerman, Yukinori Ono, Yasuo Takahashi
We observe a quantized current due to single-electron transfer in a small charge-coupled device, which consists of a narrow Si-wire channel with fine gates; the gate is used to form a tunable barrier potential. By modulating two barrier potentials under

Patterning Retinal Cells on Polyelectrolyte Multilayers

February 18, 2004
Author(s)
Darwin Reyes-Hernandez, Elizabeth M. Perruccio, Patricia Becerra, Laurie E. Locascio, Michael Gaitan
The patterning of retinal epithelial cells on polyelectrolyte multilayer (PEMs) lines is presented. PEMs were deposited in discrete lines using a poly(dimethylsiloxane) (PDMS) microfluidic network on top of a flat PDMS slab. The layers were formed by

Segmentation for Robust Tracking in the Presence of Severe Occlusion

February 18, 2004
Author(s)
Camillo A. Gentile, M Sznaier, O Camps
Tracking an object in a sequence of images can fail due to partial occlusion or clutter. Robustness to occlusion can be increased by tracking the object as a set of parts such that not all of these are occluded at the same time. However, successful

Absolute frequency measurements with a stabilized near-infrared optical frequency comb from a Cr:forsterite laser

February 15, 2004
Author(s)
Kristan L. Corwin, I Thomann, A Bartels, Tasshi Dennis, W. Fox, William C. Swann, E. A. Curtis, C. W. Oates, G Wilpers, Sarah L. Gilbert, Leo W. Hollberg, Nathan R. Newbury, Scott A. Diddams, Jeffrey W. Nicholson, M. Yan
A frequency comb is generated with a chromium-doped forsterite femtosecond laser, spectrally broadened in dispersion-shifted highly nonlinear fiber, and stabilized. The resultant evenly spaced comb of frequencies ranges from 1.1 to beyond 1.8 υm. The

Nonequilibrium Quasiparticles and Periodicity in Single-Cooper-Pair Transistors

February 13, 2004
Author(s)
Joe Aumentado, Mark W. Keller, John M. Martinis, Michel H. Devoret
We have made single-Cooper-pair transistors in which we control the spatial profile of the superconducting gap energy by oxygen doping. The profile dramatically affects the switching current vs. gate voltage curve of the transistor, changing its period

Phenomenological Theory of Current-Induced Magnetization Precession

February 13, 2004
Author(s)
Mark D. Stiles, J Xiao, A Zangwill
We solve appropriate drift-diffusion and Landau-Lifshitz-Gilbert equations to demonstrate that unpolarized current flow from a non-magnet into a ferromagnet can produce a precession-type instability of the magnetization. The fundamental origin of the

High-Resolution Cavity Ring-Down Spectroscopy of H216O at 10687.36 cm-1

February 11, 2004
Author(s)
Joseph T. Hodges
We describe a frequency-stabilized cavity ring-down spectroscopy apparatus enabling high-resolution line shape measurements of water vapor. The measured line strength and broadening parameter for the H216O transition at 10687.36 cm-1 are compared to

Workflow Automation in a B2B Web-Portal Testbed

February 10, 2004
Author(s)
Marjane Mabrouk, Frederic J. de Vaulx, Tom Rhodes
The work described in this report, focused on specifying and managing different steps of a Business-to-Business (B2B) workflow by developing and integrating a Workflow Management System (WMS) within the NIST B2B Web-portal. This allows us to manage the
Displaying 38901 - 38925 of 73461
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