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Motion-Dependent Fluid Forces Acting on Tube Arrays in Crossflow

Description: Motion-dependent fluids forces acting on a tube array were measured as a function of excitation frequency, excitation amplitude, and flow velocity. Fluid-damping and fluid-stiffness coefficients were obtained from measured motion-dependent fluid forces as a function of reduced flow velocity and excitation amplitude. The water channel and test setup provide a sound facility for obtaining key coefficients for fluid-elastic instability of tube arrays in crossflow. Once the guideline, based on the … more
Date: June 1993
Creator: Chen, Shoei-Sheng; Zhu, S. & Jendrzejczyk, J. A.
Partner: UNT Libraries Government Documents Department
open access

Experiment on Fluidelastic Instability of Loosely Supported Tube Arrays in Crossflow

Description: A tube array supported by baffle plates in crossflow may be subjected to fluid-elastic instability in the tube-support-plate-inactive mode. An experimental study is presented to characterize the tube motion. Three series of tests were performed to measure tube displacements as a function of flow velocity for different clearances. The motion was examined by root-mean-square values of tube displacements, power spectral densities, phase planes, Poincare maps, and Lyapunov exponents. The experiment… more
Date: June 1993
Creator: Chen, Shoei-Sheng; Zhu, S. & Cai, Y.
Partner: UNT Libraries Government Documents Department
open access

Users manual for the Chameleon Parallel Programming Tools

Description: Message passing is a common method for writing programs for distributed-memory parallel computers. Unfortunately, the lack of a standard for message passing has hampered the construction of portable and efficient parallel programs. In an attempt to remedy this problem, a number of groups have developed their own message-passing systems, each with its own strengths and weaknesses. Chameleon is a second-generation system of this type. Rather than replacing these existing systems, Chameleon is mea… more
Date: June 1993
Creator: Gropp, William & Smith, Barry
Partner: UNT Libraries Government Documents Department
open access

Preliminary Plan for Treating Mixed Waste

Description: A preliminary waste treatment plan was developed for disposing of radioactive inorganic liquid wastes that contain hazardous metals and/or hazardous acid concentrations at Argonne National Laboratory. This plan, which involves neutralization and sulfide precipitation followed by filtration, reduces the concentration of hazardous metals and the acidity so that the filtrate liquid is simply a low-level radioactive waste that can be fed to a low-level waste evaporator.
Date: June 1993
Creator: Vandegrift, G. F.; Conner, C.; Hutter, Joseph C.; Leonard, R. A.; Nuñez, Luis; Sedlet, J. et al.
Partner: UNT Libraries Government Documents Department
open access

Health Insurance: The Hawaii Experience

Description: This paper provides a detailed look at the State that is often considered a model for what States can do to help provide universal or near universal health insurance coverage for their residents. The paper discusses the history of health insurance provision in Hawaii, emphasizing two relatively recent State insurance laws: 1) the 1974 law that required employers to offer coverage to most of their employees, and 2) the 1989 law that provided a State subsidy for coverage of those individuals who … more
Date: June 1993
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
open access

Who Goes There: Friend or Foe?

Description: This report discusses the problem of fratricide, or “friendly fire” casualties among combat units. The House Armed Services Committee requested that OTA assess the technology and techniques available to reduce this tragic loss of life.
Date: June 1993
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
open access

Advanced Network Technology

Description: This background paper analyzes technologies for tomorrow’s information superhighways. Advanced networks will first be used to support scientists in their work, linking researchers to supercomputers, databases, and scientific instruments. The paper also describes six test networks that are being funded as part of the High Performance Computing and Communications Program.
Date: June 1993
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
open access

An Inconsistent Picture: A Compilation of Analyses of Economic Impacts of Competing Approaches to Health Care Reform by Experts and Stakeholders

Description: This report reviews numerous analyses of the economic impacts of the major approaches to health care reform addressed in this Report-Single Payer, Play-or-Pay, Individual Vouchers or Tax Credits, and Managed Competition and identifies some of the key issues and significant assumptions behind the estimates provided in these analyses.
Date: June 1993
Creator: United States. Congress. Office of Technology Assessment.
Partner: UNT Libraries Government Documents Department
open access

Pilot study risk assessment for selected problems at the Nevada Test Site (NTS)

Description: The Nevada Test Site (NTS) is located in southwestern Nevada, about 105 km (65 mi) northwest of the city of Las Vegas. A series of tests was conducted in the late 1950s and early 1960s at or near the NTS to study issues involving plutonium-bearing devices. These tests resulted in the dispersal of about 5 TBq of [sup 239,24O]Pu on the surficial soils at the test locations. Additionally, underground tests of nuclear weapons devices have been conducted at the NTS since late 1962; ground water bene… more
Date: June 1, 1993
Creator: Daniels, J.I. (ed.)
Partner: UNT Libraries Government Documents Department
open access

Recovery and purification of nickel-63 from HFIR-irradiated targets

Description: The production of large quantities of high-specific-activity [sup 63]Ni (>10 Ci/g) requires both a highly enriched [sup 62]Ni target and a long irradiation period at high neutron flux. Trace impurities in the nickel and associated target materials are also activated and account for a significant fraction of the discharged activity and essentially all of the gamma activity. While most of these undesirable activation products can be removed as chloride complexes during anion exchange, chromium, p… more
Date: June 1, 1993
Creator: Williams, D. F.; O'Kelley, G. D.; Knauer, J. B.; Porter, C. E. & Wiggins, J. T.
Partner: UNT Libraries Government Documents Department
open access

Digital control systems in nuclear power plants: Failure information, modeling concepts, and applications

Description: This report briefly describes some current applications of advanced computerized digital display and control systems at US commercial nuclear power plants and presents the results of a literature search that was made to gather information on the reliability of these systems. Both hardware and software reliability were addressed in this review. Only limited failure rate information was found, with the chemical process industry being the primary source of information on hardware failure rates and… more
Date: June 23, 1993
Creator: Galyean, W.J.
Partner: UNT Libraries Government Documents Department
open access

Pacific Northwest Laboratory Annual Report for 1992 to the DOE Office of Energy Research

Description: This report summarizes progress in OHER biological research and general life sciences research programs conducted at PNL in FY 1992. The research develops the knowledge and fundamental principles necessary to identify, understand, and anticipate the long-term health consequences of energy-related radiation and chemicals. Our continuing emphasis is to decrease the uncertainty of health risk estimates from energy-related technologies through an increase understanding of the ways in which radiatio… more
Date: June 1, 1993
Creator: Kreml, S. A. (ed.) & Park, J. F.
Partner: UNT Libraries Government Documents Department
open access

Computation and graphics in mathematical research

Description: Current research is described on: grain boundaries and dislocations in compound polymers, boundary value problems for hypersurfaces constant Gaussian curvature, and discrete computational geometry. 19 refs, 4 figs.
Date: June 1, 1993
Creator: Hoffman, D.A. & Spruck, J.
Partner: UNT Libraries Government Documents Department
open access

The European nuclear power industry: Restructuring for combined strength and worldwide leadership

Description: The European nuclear power industry is being restructured from an industry drawn along national lines to a European-wide industry. This, in part, reflects growth of the European Economic Community, but it also reflects changes in the international nuclear power industry. The objectives of the participants, beyond better integration of the nuclear industry in Western Europe, are to (1) obtain European leadership of the worldwide commercial nuclear power industry, (2) improve medium- and long-ter… more
Date: June 18, 1993
Creator: Forsberg, C.W.; Norman, R.E.; Reich, W.J. & Hill, L.J.
Partner: UNT Libraries Government Documents Department
open access

Conical geometry for sagittal focusing as applied to X rays from synchrotrons

Description: The authors describe a method for simultaneously focusing and monochromatization of X rays from a fan of radiation having up to 15 mrad divergence in one dimension. This geometry is well suited to synchrotron radiation sources at magnifications of one-fifth to two and is efficient for X-ray energies between 3 and 40 keV (0.48 and 6.4 fJ). The method uses crystals bent to part of a cone for sagittal focusing and allows for the collection of a larger divergence with less mixing of the horizontal … more
Date: June 1, 1993
Creator: Ice, G. E. & Sparks, C. J.
Partner: UNT Libraries Government Documents Department
open access

Dynamic impact and pressure analysis of the insensitive munitions container PA103 with modified design features

Description: This report presents analytical analyses of the insensitive munitions container PA103, with modified design features for a static internal pressure of 500 psi and for a dynamic impact resulting from a 7-ft free fall onto a rigid surface. The modified design features addressed by the analyses were the inclusion of a score pattern on the container cylindrical body and a plastic plate (fuse) sandwiched between metal flanges on the container end. The objectives of both the pressure and impact analy… more
Date: June 1, 1993
Creator: Handy, K.D.
Partner: UNT Libraries Government Documents Department
open access

Measurements of the total CO[sub 2] concentration and partial pressure of CO[sub 2] in seawater during WOCE expeditions in the South Pacific Ocean

Description: During the first year of the grant, we participated in three WOCE expeditions (a total of 152 days at sea) in the South Pacific Ocean, and the field phase of the proposed investigation has been successfully completed. The total CO[sub 2] concentration and pCO[sub 2] were determined at sea in 4419 water samples collected at 422 stations. On the basis of the shipboard analyses of SIO Reference Solutions for CO, and a comparison with the results of previous expeditions, the overall precision of ou… more
Date: June 29, 1993
Creator: Takahashi, T.; Goddard, J. G.; Chipman, D. W. & Rubin, S. I.
Partner: UNT Libraries Government Documents Department
open access

NREL Solar Radiation Resource Assessment Project: Status and Outlook, FY 1992 Annual Progress Report

Description: This annual report summaries the activities and accomplishments of the Solar Radiation Resource Assessment Project during fiscal year 1992 (1 October to 30 September 1992). Managed by the Analytic Studies Division of the National Renewable Energy Laboratory, this project is the major activity of the US Department of Energy's Resource Assessment Program.
Date: June 1, 1993
Creator: Renne, D.; Maxwell, E.; Stoffel, T.; Marion, B.; Rymes, M.; Wilcox, S. et al.
Partner: UNT Libraries Government Documents Department
open access

The three-point function as a probe of models for large-scale structure

Description: The authors analyze the consequences of models of structure formation for higher-order (n-point) galaxy correlation functions in the mildly non-linear regime. Several variations of the standard [Omega] = 1 cold dark matter model with scale-invariant primordial perturbations have recently been introduced to obtain more power on large scales, R[sub p] [approximately]20 h[sup [minus]1] Mpc, e.g., low-matter-density (non-zero cosmological constant) models, [open quote]tilted[close quote] primordial… more
Date: June 19, 1993
Creator: Frieman, J.A. (Fermi National Accelerator Lab., Batavia, IL (United States)) & Gaztanaga, E. (Univ. of Oxford (United Kingdom))
Partner: UNT Libraries Government Documents Department
open access

Human genome sequencing with direct x-ray holographic imaging

Description: Direct holographic imaging of biological materials is widely applicable to the study of the structure, properties and action of genetic material. This particular application involves the sequencing of the human genome where prospective genomic imaging technology is composed of three subtechnologies, name an x-ray holographic camera, suitable chemistry and enzymology for the preparation of tagged DNA samples, and the illuminator in the form of an x-ray laser. We report appropriate x-ray camera, … more
Date: June 8, 1993
Creator: Rhodes, C.K.
Partner: UNT Libraries Government Documents Department
open access

Evaluation of potential runaway generation in large-tokamak disruptions

Description: A detailed evaluation of various potential mechanisms for the generation of strong runaway beams during disruptions of largetokamak devices, including TFTR, JET, DIIID and ITER, is performed based on typical operating parameters of these devices and the presently accepted disruption model. The main results include: (1) In the existing devices, the evaporative preicer'' process by itself can lead to sizable runaway beams in disruptions of high-current-medium-to-low-ne discharges. In ITER, such r… more
Date: June 1, 1993
Creator: Fleischmann, H. H. & Zweben, S. J.
Partner: UNT Libraries Government Documents Department
open access

A comparison group analysis of DOE's Energy-Related Inventions Program

Description: Over the past decade, Oak Ridge National Laboratory has conducted four evaluations of the economic impacts of the US DOE's Energy-Related Inventions Program (ERIP). None of these evaluations has involved the use of a comparison group. Instead, statistics on the innovation process have been compiled from a review of the literature. Unfortunately, the types of technologies and inventors documents by previous studies do not match those supported by the Energy-Related Inventions Program. ERIP-suppo… more
Date: June 1, 1993
Creator: Brown, M. A.; Curlee, T. R.; Elliott, S. R. & Franchuk, C. A.
Partner: UNT Libraries Government Documents Department
open access

The study of structure-processing-property relations in copper oxide based high [Tc] superconductors

Description: Objective is investigation of critical current limiting processes in bulk superconductors. Since the grain boundaries play a key role here, we focus on the electrical characterization of single grain boundaries. Electrical contact to thin polished sections is established with thermosonic wire bonding. Laser cutting is used to isolate a single grain boundary. Results on YBa[sub 2]Cu[sub 3]O[sub x] showed that two different types of grain boundaries are present. Most grain boundaries showed curre… more
Date: June 1, 1993
Creator: Kingon, A. I.
Partner: UNT Libraries Government Documents Department
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