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Displaying 41626 - 41650 of 74428

Atomic vapor cells for miniature frequency references

May 8, 2003
Author(s)
Svenja A. Knappe, V. Velichansky, Hugh Robinson, Li-Anne Liew, John M. Moreland, John Kitching, Leo W. Hollberg
We report on the fabrication of millimeter-sized vapor cells and their performance on atomic clocks based on coherent population trapping (CPT). We discuss two fabrication techniques, the first one based on hollow-core pyrex fibers, fused with a CO 2 laser

Atoms on Demand: Fast, Deterministic Production of Single Cr Atoms

May 5, 2003
Author(s)
S Hill, Jabez McClelland
We have realized a method for producing single Cr atoms on demand by suppressing the stochastic nature of the loading and loss processes of a magneto-optic trap. We observe single-atom trap occupation probabilities as high as (98.7 plus or minus} 0.1)% and

A Sensitive Very Large Array Search for Small-Scale Glycine Emission Toward OMC-1

May 1, 2003
Author(s)
J M. Hollis, J A. Pedelty, Lewis E. Snyder, P R. Jewell, Francis J. Lovas, Patrick Palmer, S Y. Liu
We have conducted a deep Q-band (lambda similar to 7 mm) search with the Very Large Array (VLA) toward OMC-1 for the lowest energy conformation ( conformer I) of glycine (NH2CH2COOH) in four rotational transitions: 6(15)-5(14), 6(24)-5(23), 7(17)-6(16)

A Simulation Study of Repeatability and Bias in the CD-SEM

May 1, 2003
Author(s)
John S. Villarrubia, Andras Vladar, Michael T. Postek
The ability of a critical dimension scanning electron microscope (CD-SEM) to resolve differences in the widths of two lines is determined by measurement repeatability and any sample-dependent biases. In order to ascertain the dependence of these quantities

Adaptive Jitter Control for UPnP M-Search

May 1, 2003
Author(s)
Kevin L. Mills, Christopher E. Dabrowski
Selected service-discovery systems allow clients to issue multicast queries to locate network devices and services. Qualifying devices and services respond directly to clients; thus, in a large network, potential exists for responses to implode on a client

Advances in Optical Methods for Trace Gas Analysis

May 1, 2003
Author(s)
Pamela M. Chu
The fundamental principles for chemical analysis by optical methods are established. However, only recent advances in instrumentation and spectroscopic techniques have substantially expended the feasibility of routine spectroscopic analysis of gaseous

Authenticating Users on Handheld Devices

May 1, 2003
Author(s)
Wayne Jansen
Adequate user authentication is a persistent problem, particularly with handheld devices, which tend to be highly personal and at the fringes of an organization¿s influence. Yet, these devices are being used increasingly in corporate settings where they

Biomimetic Membranes on Metal Supports

May 1, 2003
Author(s)
John T. Elliott, Curtis W. Meuse, Vitalii I. Silin, Susan T. Krueger, John T. Woodward IV, T Petralli-Mallow, Anne L. Plant
Biological membranes are complex and dynamic structures. The biological functions associated with membranes involve a number of different molecular species, and theories of how the molecular species are organized are still evolving. The fluid mosaic model

Blazing a Trail

May 1, 2003
Author(s)
Peter K. Schenck, Debra L. Kaiser
In this paper we discuss the application of pulsed laser deposition (PLD) to combinatorial materials research on inorganic thin films. The modifications to an existing PLD apparatus converting it to a dual beam dual target PLD system for the production of

Bluetooth Dynamic Scheduling and Interference Mitigation

May 1, 2003
Author(s)
Nada T. Golmie
Bluetooth is a cable replacement technology for Wireless Personal Area Networks. It is designed to support a wide variety of applications such as voice, streamed audio and video, web browsing, printing, and file sharing, each imposing a number of quality

Calculation Tools at SP Fire Technology. (Abstract/Presentation/Visuals)

May 1, 2003
Author(s)
P VanHees, B Sundstrom
The Centre for Combustion Science and Technology, CECOST, was founded in 1996 at the Lund Institute of Technology, in close collaboration with Chalmers University of Technology and the Royal Institute of Technology. The Centre is funded by the Foundation

Calibration Strategies for Overlay and Registration Metrology

May 1, 2003
Author(s)
Richard M. Silver, Michael T. Stocker, Ravikiran Attota, M R. Bishop, Jay S. Jun, Egon Marx, M P. Davidson, Robert D. Larrabee
Critical dimensions in current and next generation devices are driving the need for tighter overlay registration tolerances and improved overlay metrology tool accuracy and repeatability. Tool matching, performance evaluation, model-based metrology, and a
Displaying 41626 - 41650 of 74428
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