33,784 Matching Results

Search Results

prev Results: 33769 - 33784
open access

Fresnel Integral Equations: Numerical Properties

Description: A spatial-domain solution to the problem of electromagnetic scattering from a dielectric half-space is outlined. The resulting half-space operators are referred to as Fresnel surface integral operators. When used as preconditioners for nonplanar geometries, the Fresnel operators yield surface Fresnel integral equations (FIEs) which are stable with respect to dielectric constant, discretization, and frequency. Numerical properties of the formulations are discussed.
Date: July 22, 2003
Creator: Adams, R. J.; Champagne, N. J., II & Davis, B. A.
Partner: UNT Libraries Government Documents Department
open access

The Impact of Emerging MEMS-Based Microsystems on US Defense Applications

Description: This paper examines the impact of inserting Micro-Electro-Mechanical Systems (MEMS) into US defense applications. As specific examples, the impacts of micro Inertial Measurement Units (IMUs), radio frequency MEMS (RF MEMS), and Micro-Opto-Electro-Mechanical Systems (MOEMS) to provide integrated intelligence, communication, and control to the defense infrastructure with increased affordability, functionality, and performance are highlighted.
Date: January 20, 2000
Creator: Staple, Bevan D. & Jakubczak, Jerome F., II
Partner: UNT Libraries Government Documents Department
open access

The Visionary's Dilemma

Description: Novel technologies often are born prior to identifying application arenas that can provide the financial support for their development and maturation. After creating new technologies, innovators rush to identify some previously difficult-to-meet product or process challenge. In this regard, microsystems technology is following a path that many other electronic technologies have previously faced. From this perspective, the development of a robust technology follows a three-stage approach. First … more
Date: October 12, 2001
Creator: Walsh, Steve; Myers, David R.; Sumpter, Carol W. & Jakubczak, Jerome F., II
Partner: UNT Libraries Government Documents Department

Bradstreet, Anne Dudley (1612-1672)

Description: Encyclopedia article on American poet Anne Dudley Bradstreet.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 2006
Creator: Martin, John
Partner: UNT Libraries

Smith, Elizabeth Oakes Prince (1806-1893)

Description: Encyclopedia article on American poet Elizabeth Oakes Smith.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 2006
Creator: Martin, John
Partner: UNT Libraries

Osgood, Frances Sargent Locke (1811-1850)

Description: Encyclopedia article on American poet Frances Sargent Osgood.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 2006
Creator: Martin, John
Partner: UNT Libraries

Whitman, Sarah Helen Power (1803-1878)

Description: Encyclopedia article on American poet Sarah Helen Whitman.
Access: Restricted to UNT Community Members. Login required if off-campus.
Date: 2006
Creator: Martin, John
Partner: UNT Libraries
open access

Tetra Muon Cooling Ring

Description: We give a brief overview of recent simulation activities on the design of neutrino factories. Simulation work is ongoing on many aspects of a potential facility, including proton drivers, pion collection and decay channels, phase rotation, ionization cooling, and muon accelerators.
Date: November 18, 2003
Creator: Kahn, S.A.; Usubov, Z.; Raja, R.; Balbekov, V. & Fernow, R.C.
Partner: UNT Libraries Government Documents Department
open access

HYBRIDIZATION AND PRESSURE EFFECTS IN UTX COMPOUNDS

Description: No Description Available.
Date: November 1, 2001
Creator: Alsmadi, A. M.; Sechovsky, V.; Lacerda, A. H.; Prokes, K.; Kamarad, J.; Brück, E. et al.
Partner: UNT Libraries Government Documents Department
open access

Enabling Strain Hardening Simulations with Dislocation Dynamics

Description: Numerical algorithms for discrete dislocation dynamics simulations are investigated for the purpose of enabling strain hardening simulations of single crystals on massively parallel computers. The algorithms investigated include the /(N) calculation of forces, the equations of motion, time integration, adaptive mesh refinement, the treatment of dislocation core reactions, and the dynamic distribution of work on parallel computers. A simulation integrating all of these algorithmic elements using… more
Date: December 20, 2006
Creator: Arsenlis, Athanasios; Cai, Wei; Tang, Meijie; Rhee, Moono; Oppelstrup, Tomas; Hommes, Gregg et al.
Partner: UNT Libraries Government Documents Department
open access

DEVELOPMENTS IN THE MEASUREMENT OF ACTINIDES AND129I AT LLNL BY ACCELERATOR MASS SPECTROMETRY

Description: The application of ultra-sensitive heavy isotope measurements continues to expand in a variety of fields relevant to the management of nuclear materials, including nuclear isotope forensics and radiobioassay. We have developed a heavy isotope accelerator mass spectrometry (AMS) system at Lawrence Livermore National Laboratory's (LLNL) Center for Accelerator Mass Spectrometry (CAMS). The system was designed particularly for the measurement of actinide concentrations and isotopic ratios, but also… more
Date: January 13, 2005
Creator: Brown, T. A.; Marchetti, A. A.; Weyhenmeyer, C. E.; Knezovich, J. P.; Hamilton, T. F. & Nimz, G. J.
Partner: UNT Libraries Government Documents Department
open access

Imaging Detectors for 20-100 ke V X-ray Backlighters in HEDES Petawatt Experiments

Description: We are developing a petawatt laser for use as a high energy backlighter source in the 20{approx} 100 keV range. High energy x-ray backlighters will be essential for radiographing High-Energy- Density Experimental Science (HEDES) targets for NIF projects especially to probe implosions and high areal density planar samples. For these experiments we are employing two types of detectors: a columnar grown CsI scintillator coupled to a 2K x 2K CCD camera and a CdTe crystal with a special ASIC readout… more
Date: April 16, 2004
Creator: Wickersham, J. E.; Park, H.; Bell, P. M.; Koch, J. A.; Landen, O. L. & Moody, J. D.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen