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open access

U.S. Infrastructure: Funding Trends and Federal Agencies' Investment Estimates

Description: Testimony issued by the General Accounting Office with an abstract that begins "This testimony discusses the (1) federal government's role in ensuring a sound public infrastructure and (2) estimates of future investment requirements developed by seven federal agencies: the Appalachian Regional Commission, the Environmental Protection Agency, the Federal Aviation Administration, the Federal Highway Administration, the General Services Administration, and the U.S. Army Corps of Engineers. GAO fou… more
Date: July 23, 2001
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

Subsurface Contaminant Focus Area: Monitored Natural Attenuation (MNA)--Programmatic, Technical, and Regulatory Issues

Description: Natural attenuation processes are commonly used for remediation of contaminated sites. A variety of natural processes occur without human intervention at all sites to varying rates and degrees of effectiveness to attenuate (decrease) the mass, toxicity, mobility, volume, or concentration of organic and inorganic contaminants in soil, groundwater, and surface water systems. The objective of this review is to identify potential technical investments to be incorporated in the Subsurface Contaminan… more
Date: July 23, 2001
Creator: Krupka, Kenneth M. & Martin, Wayne J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Berkeley Off-line Radioisotope Generator (BORG)

Description: Development of chemical separations for the transactinides has traditionally been performed with longer-lived tracer activities purchased commercially. With these long-lived tracers, there is always the potential problem that the tracer atoms are not always in the same chemical form as the short-lived atoms produced in on-line experiments. This problem is especially severe for elements in groups 4 and 5 of the periodic table, where hydrolysis is present. The long-lived tracers usually are store… more
Date: July 23, 2001
Creator: Sudowe, Ralf & Patin, Joshua B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Implications of the Drift Scale Heater Test at Yucca Mountain for Epithermal Mineralization

Description: An 8-year long, drift scale heater test (DST) is currently underway at the underground Exploratory Studies Facility at Yucca Mountain in Nevada. The host rock for the DST is a highly fractured, welded tuff. The rock has {approx}10% matrix porosity 90% filled with water. After a little more than two years of heating, the temperature at the drift wall reached {approx}200 C and has been maintained at that temperature for the past {approx}1.5 years. Gas and water (both vapor and liquid) have been c… more
Date: July 23, 2001
Creator: Conrad, Mark E. & Sonnenthal, Eric L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Antenna-coupled arrays of voltage-biased superconducting bolometers

Description: We report on the development of antenna-coupled Voltage-biased Superconducting Bolometers (VSBs) which use Transition-edge Sensors (TES). Antenna coupling can greatly simplify the fabrication of large multi-frequency bolometer arrays compared to horn-coupled techniques. This simplification can make it practical to implement 1000+ element arrays that fill the focal plane of mm/sub-mm wave telescopes. We have designed a prototype device with a double-slot dipole antenna, integrated band-defining … more
Date: July 23, 2001
Creator: Myers, Michael J.; Lee, Adrian T.; Richards, P. L.; Schwan, D.; Skidmore, J. T.; Smith, A. D. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

BLM and the Forest Service: Federal Taxpayers Could Benefit More From Land Sales

Description: A letter report issued by the General Accounting Office with an abstract that begins "Since 1781, the federal government has transferred or sold about 1.1 billion acres to nonfederal entities--such as state and local governments, businesses, nonprofit groups, and individual citizens--under various initiatives that promoted general economic development, developed transportation systems, supported public schools, and encouraged settlement of the western frontier. Today, the Bureau of Land Managem… more
Date: July 23, 2001
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Global Static Indexing for Real-Time Exploration of Very Large Regular Grids

Description: In this paper we introduce a new indexing scheme for progressive traversal and visualization of large regular grids. We demonstrate the potential of our approach by providing a tool that displays at interactive rates planar slices of scalar field data with very modest computing resources. We obtain unprecedented results both in terms of absolute performance and, more importantly, in terms of scalability. On a laptop computer we provide real time interaction with a 2048{sup 3} grid (8 Giga-nodes… more
Date: July 23, 2001
Creator: Pascucci, V & Frank, R
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Parallelizing a High Accuracy Hardware-Assisted Volume Renderer for Meshes with Arbitrary Polyhedra

Description: This paper discusses our efforts to improve the performance of the high-accuracy (HIAC) volume rendering system, based on cell projection, which is used to display unstructured, scientific data sets for analysis. The parallelization of HIAC, using the pthreads and MPI API's, resulted in significant speedup, but interactive frame rates are not yet attainable for very large data sets.
Date: July 23, 2001
Creator: Bennett,J; Cook,R; Max,N; May,D & Williams,P
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Damage Prediction and Estimation in Structural Mechanics Based on Data Mining

Description: Damage in a material includes localized softening or cracks in a structural component due to high operational loads, or the presence of flaws in a structure due to various manufacturing processes. Methods that identify the presence, the location and the severity of damage in the structure are useful for non-destructive evaluation procedures that are typically employed in agile manufacturing and rapid prototyping systems. The current state-of-the art techniques for these inverse problems are com… more
Date: July 23, 2001
Creator: Sandhu, S S; Kanapady, R; Tamma, K K; Kamath, C & Kumar, V
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Determination of an Initial Mesh Density for Finite Element Computations via Data Mining

Description: Numerical analysis software packages which employ a coarse first mesh or an inadequate initial mesh need to undergo a cumbersome and time consuming mesh refinement studies to obtain solutions with acceptable accuracy. Hence, it is critical for numerical methods such as finite element analysis to be able to determine a good initial mesh density for the subsequent finite element computations or as an input to a subsequent adaptive mesh generator. This paper explores the use of data mining techniq… more
Date: July 23, 2001
Creator: Kanapady, R; Bathina, S K; Tamma, K K; Kamath, C & Kumar, V
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
captions transcript

[News Clip: Hewlett Packard Layoffs]

Description: B-roll video footage from the KXAS-TV/NBC station in Fort Worth, Texas, to accompany a news story.
Date: July 23, 2001, 4:00 p.m.
Duration: 51 seconds
Creator: KXAS-TV (Television station : Fort Worth, Tex.)
Item Type: Refine your search to only Video
Partner: UNT Libraries Special Collections
open access

Subsurface Contaminant Focus Area: Monitored Natural Attenuation (MNA)--Programmatic, Technical, and Regulatory Issues

Description: Natural attenuation processes are commonly used for remediation of contaminated sites. A variety of natural processes occur without human intervention at all sites to varying rates and degrees of effectiveness to attenuate (decrease) the mass, toxicity, mobility, volume, or concentration of organic and inorganic contaminants in soil, groundwater, and surface water systems. The objective of this review is to identify potential technical investments to be incorporated in the Subsurface Contaminan… more
Date: July 23, 2001
Creator: Krupka, Kenneth M & Martin, Wayne J
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

A Numerical Analysis of the Single-Well Steam Assisted Gravity Drainage (SW-SAGD) Process, SUPRI TR-124

Description: Results from this study include cumulative recoveries, temperature distributions, and production rates. It was found that cyclic steaming of the reservoir offers the most favorable option for heating the near-wellbore area to create conditions that improve initial SAGD response. More favorable reservoir conditions such as low viscosity, thick oil zones, and solution gas, improved reservoir response. Under unfavorable conditions, response was limited.
Date: July 23, 2001
Creator: Elliot, K. T. & Kovscek, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

High power test of the first s-band rf gun at SRRC.

Description: We had constructed an S-band high power rf system at SRRC (Synchrotron Radiation Research Center). It will be used as a test bench of various designs of S-band rf guns. A 2856 MHz PFN (Pulse Forming Network) system was built to deliver 2 {micro}s, 40KV voltage pulse at 10Hz repetition rate for the XK-5 Klystron. As a quick start, we had fabricated a 2856MHz single cell rf gun for the high power test. The recent results are reported.
Date: July 23, 2001
Creator: Ho, C. H.; Chang, S. S.; Chiou, J. P.; Fann, C. S.; Hsu, K. T.; Hsu, S. Y. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Arpes Evidence for a Quasiparticle Liquid in Overdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+delta}.

Description: High resolution angle-resolved photoemission spectroscopy of highly overdoped Bi{sub 2}Sr{sub 2}CaCu{sub 2}O{sub 8+{delta}} with a T{sub c} = 51K indicates that the basic transport processes in this material are fundamentally different from both the lesser doped cuprates as well as model metallic compounds. The overdoped sample has sharp ARPES peaks at the Fermi energy throughout the Brillouin zone even in the normal state, unlike the lesser-doped compounds. In particular, the spectra near ({pi… more
Date: July 23, 2001
Creator: Wells, B. O.; Yusof, Z.; Valla, T.; Fedorov, A. V.; Johnson, P.; Kendziora, C. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Visualization of Solution Gas Drive in Viscous Oil, SUPRI TR-126

Description: Several experimental studies of solution gas drive are available in this report. Almost all of the studies have used light oil. Solution gas drive behavior, especially in heavy oil reservoirs, is poorly understood. Experiments were performed in which pore-scale solution gas drive phenomena were viewed in water/carbon dioxide and viscous oil/carbon dioxide systems. A new pressure vessel was designed and constructed to house silicon-wafer micromodels that previously operated at low (<3 atm) pr… more
Date: July 23, 2001
Creator: George, D. S. & Kovscek, A. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Influence of Fold and Fracture Development on Reservoir Behavior of the Lisburne Group of Northern Alaska

Description: The Carboniferous Lisburne Group is a major carbonate reservoir unit in northern Alaska. The lisburne is detachment folded where it is exposed throughout the northeastern Brooks Range, but is relatively underformed in areas of current production in the subsurface of the North Slope. The objectives of this study are to develop a better understanding of four major aspects of the Lisburne: (1) The geometry and kinematics of detachment folds and their truncation by thrust faults, (2) The influence … more
Date: July 23, 2001
Creator: Wallace, Wesley K.; Hanks, Catherine L.; Whalen, Michael T.; Jensen1, Jerry; Shackleton, J. Ryan; Jadamec, Margarete A. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The radiation environment in and near high gradient rf cavities.

Description: The radiation environment in and near high gradient rf cavities is very important for the instrumentation of the MUCOOL experiment, since large fluxes of x rays and dark current electrons can interfere with the operation of the muon detectors. We have measured the x ray and dark current spectra from a single cell, 1.3 GHz, and are beginning to make more extensive measurements of a multicelled 805 MHz cavity. The results are consistent with electron field emission, bremsstrahlung and photon abso… more
Date: July 23, 2001
Creator: Ducas, L.; Norem, J.; Geer, S.; Moretti, A.; Popovic, M. & Solomey, N.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

PHASE II CALDERON PROCESS TO PRODUCE DIRECT REDUCED IRON RESEARCH AND DEVELOPMENT PROJECT

Description: This project was initially targeted to the making of coke for blast furnaces by using proprietary technology of Calderon in a phased approach, and Phase I was completed. The project was then re-directed to the making of iron units. U.S. Steel teamed up with Calderon for a joint effort which will last 30 months to produce directly reduced iron with the potential of converting it into molten iron (hot metal) consistent with the Roadmap recommendations of 1998 prepared by the Steel Industry in coo… more
Date: July 23, 2001
Creator: Calderon, Albert
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Spent Fuel Criticality Benchmark Experiments

Description: Characteristics between commercial spent fuel waste packages (WP), Laboratory Critical Experiments (LCEs), and commercial reactor critical (CRC) evaluations are compared in this work. Emphasis is placed upon comparisons of CRC benchmark results and the relative neutron flux spectra in each system. Benchmark evaluations were performed for four different pressurized water reactors using four different sets of isotopes. As expected, as the number of fission products used to represent the burned fu… more
Date: July 23, 2001
Creator: Scaglione, J.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Simulating the Thermal History of the Unsaturated Zone at Yucca Mountain, Nevada

Description: Heat transfer within Earth's upper crust is primarily by conduction, and conductive thermal models adequately explain the cooling history of deep, batholith-scale intrusions and surrounding wall rocks, as confirmed by numerous thermochronometric studies. However, caldera magmatic systems require consideration of the small and localized component of hydrothermal convection and numerical models to simulate additional boundary conditions, irregular magma chamber shapes, and complex intrusive histo… more
Date: July 23, 2001
Creator: Marshal, B. D. & Whelan, J. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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