Search Results

open access

A NEW APPROACH TO RADIONUCLIDE ANALYSIS IN GROUNDWATERS

Description: A method using liquid scintillation spectral analysis (LSSA) for analyzing mixtures of radionuclides in groundwater samples, which is fast, simple, and inexpensive, was developed and bench-tested. Samples can be measured in a field laboratory with a new commercial portable liquid scintillation instrument that provides advanced analysis, display, and computational features previously found only in large expensive laboratory models. Results can be available within hours from the time samples are … more
Date: August 31, 2004
Creator: HOCHEL, ROBERTC.
Partner: UNT Libraries Government Documents Department
open access

Architecture independent performance characterization andbenchmarking for scientific applications

Description: A simple, tunable, synthetic benchmark with a performance directly related to applications would be of great benefit to the scientific computing community. In this paper, we present a novel approach to develop such a benchmark. The initial focus of this project is on data access performance of scientific applications. First a hardware independent characterization of code performance in terms of address streams is developed. The parameters chosen to characterize a single address stream are relat… more
Date: August 31, 2004
Creator: Strohmaier, Erich & Shan, Hongzhang
Partner: UNT Libraries Government Documents Department
open access

Stoichiometric changes in KH2PO4 crystals during laser-induced breakdown

Description: The structure of KH{sub 2}PO{sub 4} single crystals (so-called KDP) irradiated with {approx} 3-ns, 355-nm laser pulses with fluences above the laser-induced breakdown threshold is studied by a combination of Raman scattering, photoluminescence, and soft x-ray absorption spectroscopies. We compare spectra from the as-grown material, surface and bulk laser-induced damage sites, as well as from KPO{sub 3} references. Results show that irradiation with fluences above the laser-induced breakdown thr… more
Date: August 31, 2004
Creator: Negres, R A; Kucheyev, S O; DeMange, P; Bostedt, C; van Buuren, T; Nelson, A J et al.
Partner: UNT Libraries Government Documents Department
open access

Shape Change Studies of BCC Single Crystals Using a Non-Contact Image Correlation System

Description: A 3-D image correlation system has been used to study the deformation behavior of high purity molybdenum single crystals. This system, in conjunction with a recently developed experimental apparatus, provides the full field displacement and strain data needed to validate dislocation dynamics simulations. The accuracy of the image correlation system was verified by comparing the results with data taken from conventional strain gage rosettes. In addition, a stress analysis has been performed to e… more
Date: August 31, 2004
Creator: Florando, J. N.; Lassila, D. H.; Leblanc, M. M.; Kay, G. J.; Perfect, S. A.; Arsenlis, A. et al.
Partner: UNT Libraries Government Documents Department
open access

Breeding pond selection and movement patterns by eastern spadefoot toads (Scaphiopus holbrookii) in relation to weather and edaphic conditions.

Description: Cathryn H. Greenberg and George W. Tanner. 2004. Breeding pond selection and movement patterns by eastern spadefoot toads (Scaphiopus holbrookii) in relation to weather and edaphic conditions. J. Herp. 38(4):569-577. Abstract: Eastern Spadefoot Toads (Scaphiopus holbrookii) require fish-free, isolated, ephemeral ponds for breeding but otherwise inhabit the surrounding uplands, commonly xeric longleaf pine (Pinus palustris) –wiregrass (Aristida beyrichiana). Hence both pond and upland conditions… more
Date: August 31, 2004
Creator: Greenberg, Cathyrn, H. & Tanner, George, W.
Partner: UNT Libraries Government Documents Department
Back to Top of Screen