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49
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16
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15
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12
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Proposed and Actual Budget Totals for the Fiscal Years 1980 Through 2001
This report contains a table of proposed, estimated, and actual budget totals for the fiscal years 1980 through 2001. The totals used in the report are based on total receipts and total outlays, not on proposed or approved annual appropriations which provide only a portion of the government's annual spending budget.
Date:
May 8, 2002
Creator:
Winters, Philip D.
Object Type:
Report
System:
The UNT Digital Library
Toward Strehl-Optimizing Adaptive Optics Controllers
A main objective of adaptive optics is to maximize closed-loop Strehl, or, equivalently, minimize the statistical mean-square wavefront residual. Most currently implemented AO wavefront reconstructors and closed-loop control laws do not take into account either the correlation of the Kolmogorov wavefronts over time or the modified statistics of the residual wavefront in closed loop. There have been a number of attempts in the past to generate ''predictive'' controllers, which utilize wind speed and Cn2 profiles and incorporate one or two previous time steps. We present here a general framework for a dynamic controller/reconstructor design where the goal is to maximize mean closed-loop Strehl ratio over time using all previous data and exploiting the spatial-temporal statistics of the Kolmogorov turbulence and measurement noise.
Date:
October 8, 2002
Creator:
Gavel, D & Wiberg, D
Object Type:
Article
System:
The UNT Digital Library
Uranyl-Fluoride (235U) Solutions in Spherical Stainless Steel Vessels with Reflectors of Be, Ch2 and Be-Ch2 Composites, Part II
A series of criticality studies were performed at the Lawrence Livermore National Laboratory in the late 1950's using aqueous solutions of {sup 233}U in the form of UO{sub 2}F{sub 2} stabilized with 0.3% by weight of HF. These experiments were assigned the program name Falstaff. The {sup 233}U concentration in these experiments ranged from 0.13 to 0.87 kg/l. Eight type 347 stainless steel spheres ranging in inner radius from 7.87 to 12.45 cm were available for use as containers for the solutions. The scope of this evaluation is limited to the experiments involving the four lowest concentrations of uranyl-fluoride solution with 0.45, 0.37, 0.24 and 0.13 kg ({sup 233}U)/l. Reflectors of beryllium, polyethylene and beryllium-polyethylene composites were used. Thirty-one configurations are evaluated and accepted as criticality-safety benchmark models. Fission rate data calculated by the evaluator (see Appendix B) show that twenty-six of these configurations have over 50% of the fissions occurring in the thermal energy range and these configurations are therefore classified as ''THERMAL''. Five of the configurations have less than 50% of the fissions occurring in any of the fast, intermediate or thermal energy range and therefore are classified as ''MIXED''.
Date:
April 8, 2002
Creator:
Heinrichs, D
Object Type:
Article
System:
The UNT Digital Library
Large Scale Atmospheric Chemistry Simulations for 2001: An Analysis of Ozone and Other Species in Central Arizona
A key atmospheric gas is ozone. Ozone in the stratosphere is beneficial to the biosphere because it absorbs a significant fraction of the sun's shorter wavelength ultraviolet radiation. Ozone in the troposphere is a pollutant (respiratory irritant in humans and acts to damage crops, vegetation, and many materials). It affects the Earths energy balance by absorbing both incoming solar radiation and outgoing long wave radiation. An important part of the oxidizing capacity of the atmosphere involves ozone, through a photolysis pathway that leads to the hydroxyl radical (OH). Since reaction with OH is a major sink of many atmospheric species, its concentration controls the distributions of many radiatively important species. Ozone in the troposphere arises from both in-situ photochemical production and transport from the stratosphere. Within the troposphere, ozone is formed in-situ when carbon monoxide (CO), methane (CH4), and non-methane hydrocarbons (NMHCs) react in the presence of nitrogen oxides (NO, = NO + NO2) and sunlight. The photochemistry of the stratosphere differs significantly from that in the troposphere. Within the stratosphere, ozone formation is initiated by the photolysis of 02. Stratospheric ozone may be destroyed via catalytic reactions with NO, H (hydrogen), OH, CI (chlorine) and Br (bromine), or photolysis. …
Date:
October 8, 2002
Creator:
Atherton, C; Bergmann, D; Cameron-Smith, P; Connell, P; Molenkamp, C; Rotman, D et al.
Object Type:
Article
System:
The UNT Digital Library
Comparison of Anti-Reflective Coated and Uncoated Surfaces Figured by Pitch-Polishing and Magneto-Rheological Processes
When completed, the National Ignition Facility (NIF) will provide laser energies in the Mega-joule range. Successful pulse amplification to these extremely high levels requires that all small optics, found earlier in the beamline, have stringent surface and laser fluence requirements. In addition, they must operate reliably for 30 years constituting hundreds of thousands of shots. As part of the first four beamlines, spherical and aspherical lenses were required for the beam relaying telescopes. The magneto-rheological technique allows for faster and more accurate finishing of aspheres. The spherical and aspherical lenses were final figured using both conventional-pitch polishing processes for high quality laser optics and the magneto-rheological finishing process. The purpose of this paper is to compare the surface properties between these two finishing processes. Some lenses were set aside from production for evaluation. The surface roughness in the mid-frequency range was measured and the scatter was studied. Laser damage testing at 1064 nm (3-ns pulse width) was performed on surfaces in both the uncoated and coated condition.
Date:
November 8, 2002
Creator:
Chow, R.; Thomas, M. D.; Bickel, R. & Taylor, J. R.
Object Type:
Article
System:
The UNT Digital Library
Commercial Remote Sensing by Satellite: Status and Issues
This report contains a brief background on commercial remote sensing by satellite. This report also includes the issues and policies provided by the government.
Date:
January 8, 2002
Creator:
Rowberg, Richard E.
Object Type:
Report
System:
The UNT Digital Library
Thick Liquid-Walled Spheromak Magnetic Fusion Power Plant
We assume a spheromak configuration can be made and sustained by a steady gun current, which injects particles, current and magnetic field, i.e., helicity injection. The equilibrium is calculated with an MHD equilibrium code, where an average beta of 10% is found. The toroidal current of 40 MA is sustained by an injection current of 100 kA (125 MW of gun power). The flux linking the gun is 1/1000th that of the flux in the spheromak. The geometry allows a flow of liquid, either molten salt, (flibe-Li{sub 2}BeF{sub 4} or flinabe-LiNaBeF{sub 4}) or liquid metal such as SnLi which protects most of the walls and structures from neutron damage. The free surface between the liquid and the burning plasma is heated by bremsstrahlung and optical radiation and neutrons from the plasma. The temperature of the free surface of the liquid is calculated and then the evaporation rate is estimated. The impurity concentration in the burning plasma is estimated and limited to a 20% reduction in the fusion power. For a high radiating edge plasma, the divertor power density of 460 MW/m{sup 2} is handled by high-speed (20 m/s), liquid jets. For low radiating edge plasmas, the divertor-power density of 1860 …
Date:
April 8, 2002
Creator:
Moir, R W; Bulmer, R H; Fowler, T K & Youssef, M Z
Object Type:
Report
System:
The UNT Digital Library
Model simulations of the first aerosol indirect effect and comparison of cloud susceptibility fo satellite measurements
Present-day global anthropogenic emissions contribute more than half of the mass in submicron particles primarily due to sulfate and carbonaceous aerosol components derived from fossil fuel combustion and biomass burning. These anthropogenic aerosols modify the microphysics of clouds by serving as cloud condensation nuclei (CCN) and enhance the reflectivity of low-level water clouds, leading to a cooling effect on climate (the Twomey effect or first indirect effect). The magnitude of the first aerosol indirect effect is associated with cloud frequency as well as a quantity representing the sensitivity of cloud albedo to changes in cloud drop number concentration. This quantity is referred to as cloud susceptibility [Twomey, 1991]. Analysis of satellite measurements demonstrates that marine stratus clouds are likely to be of higher susceptibility than continental clouds because of their lower number concentrations of cloud drops [Platnick and Twomey, 1994]. Here, we use an improved version of the fully coupled climate/chemistry model [Chuang et al., 1997] to calculate the global concentrations Of sulfate, dust, sea salt, and carbonaceous aerosols (biomass smoke and fossil fuel organic matter and black carbon). We investigated the impact of anthropogenic aerosols on cloud susceptibility and calculated the associated changes of shortwave radiative fluxes at the …
Date:
March 8, 2002
Creator:
Chuang, C.; Penner, J. E. & Kawamoto, K.
Object Type:
Article
System:
The UNT Digital Library
Capital Punishment: Summary of Supreme Court Decisions of the 2001-02 Term
this report mainly focuses on the Summary of Supreme Court Decisions of Capital Punishment during the 2001-02 Term. This case reveals distinct characteristics.
Date:
July 8, 2002
Creator:
Wallace, Paul Starett, Jr.
Object Type:
Report
System:
The UNT Digital Library
Fracture Deformation Measurements in the Large Block Test
Fracture deformations were measured in a 3m x 3m x 4.5m block of Topopah Spring tuff as part of a larger effort to characterize coupled thermal-hydrologic-mechanical-chemical processes in an isolated rock mass subjected to a one-dimensional thermal gradient. The fracture deformations were measured in three orthogonal directions at 17 points on the vertical faces of the block over a time span of 19 months. Eight fractures, including a major sub-horizontal fracture near the top of the block and five large, sub-vertical fractures, were selected for study. The data provide point measurements of apparent aperture change and slip motions parallel and perpendicular to the block faces. The fracture aperture and slip motions, though only a few tenths of a millimeter, form a significant portion of the total block deformation. The data reveal some fairly complex behaviors, such as nonuniform slip motions along individual fractures and sub-vertical fractures that sometimes open and close simultaneously at different elevations. Slip motions along sub-vertical fractures near the heater plane were relatively large and well correlated with temperature. The heating phase deformations were only partially recovered during cool-down. The fracture deformation data show that fractures deformed in conjunction with water movements and associated temperature fluctuations during …
Date:
March 8, 2002
Creator:
Carlson, S. R.; Blair, S. C. & Wagoner, J. L.
Object Type:
Article
System:
The UNT Digital Library
Electron Optics Design and Performance of a New Large-Format Two-Frame Framing Tube
We have developed a framing tube with 80-mm photocathode for capturing two frames in less than 100-ns onto a 50-mm phosphor screen. A proven electron optics trajectory code was used to design the tube for imaging fidelity over wide dynamic range. This code's full accounting of space charge effects is essential for its ability to simulate accurately the distributed photoelectronic trajectories from the entire large photocathode area. Our approach and guideline for designing the electron optics are described. Results of trajectory simulation and test measurement are reported. Substantial correlations between the code expectation and the measured results are observed on relative resolution and distortion of the frame images. This tube has been integrated into an active framing camera system for field application.
Date:
November 8, 2002
Creator:
Lai, C C
Object Type:
Article
System:
The UNT Digital Library
Country Applicability of the U.S. Normal Trade Relations (Most-Favored-Nation) Status
This report provides information about the Country Applicability of the U.S. Normal Trade Relations (Most-Favored-Nation) Status. The United States extends unlimited and permanent NTR treatment to all its trading partners.
Date:
August 8, 2002
Creator:
Pregelj, Vladimir N.
Object Type:
Report
System:
The UNT Digital Library
Impact of 2003 Building Technology, State and Community Programs on United States Employment and Earned Income
As part of measuring the impact of government programs for improving the energy efficiency of the nation's building stock, this report uses the ImBuild II model to assess the future economic impacts of Department of Energy Office of Building Technology, State and Community Programs (BTS) FY 2003 portfolio of programs, specifically the potential impact on national employment and income. The energy savings expected to be created by market penetration of the BTS programs have the potential of creating nearly 270,000 jobs and about $3.41 billion in wage income(1999$) by the year 2030.
Date:
July 8, 2002
Creator:
Scott, Michael J.; Hostick, Donna J. & Elliott, Douglas B.
Object Type:
Report
System:
The UNT Digital Library
Groundwater Monitoring Plan for the 1301-N, 1324-N/NA, and 1325-N RCRA Facilities
The 1301-N and 1325-N Liquid Waste Disposal Facilities, the 1324-N Surface Impoundment, and the 1324-NA Percolation Pond, located in the 100 N Area of the Hanford Site, are regulated under the Resource Conservation and Recovery Act of 1976 (RCRA). The closure plans for these facilities stipulate that groundwater is monitored according to the 100-N Pilot Project: Proposed Consolidated Groundwater Monitoring Program (BHI-00725). This document supplements the consolidated plan by providing information on sampling and analysis protocols, quality assurance, data management, and a conceptual model for the RCRA sites. Monitoring well networks, constituents, and sampling frequency remain the same as in the consolidated plan or the previous groundwater monitoring plan (Hartman 1996).
Date:
June 8, 2002
Creator:
Hartman, Mary J.
Object Type:
Report
System:
The UNT Digital Library
Hanford Immobilized LAW Product Acceptance: Tanks Focus Area Testing Data Package II
This report is a continuation of the Hanford Immobilized Low Activity Waste (LAW) Product Acceptance (HLP): Initial Tanks Focus Area Testing Data Package (Vienna et al. 2000). In addition to new 5000-h product consistency test (PCT), vapor hydration test (VHT), and alteration products data, some previously reported data together with relevant background information are included for an easily accessible source of reference when comparing the response of the various glasses to different test conditions. A matrix of 55 glasses was developed and tested to identify the impact of glass composition on long-term corrosion behavior and to develop an acceptable composition region for Hanford LAW glasses. Of the 55 glasses, 45 were designed to systematically vary the glass composition, and 10 were selected because large and growing databases on their corrosion characteristics had accumulated. The targeted and measured compositions of these glasses are found in the Appendix A. All glasses were fabricated according to standard procedures and heat treated to simulate the slow cooling that will occur in a portion of the waste glass after vitrification in the planned treatment facility at Hanford.
Date:
August 8, 2002
Creator:
Schulz, Rebecca L.; Lorier, Troy H.; Peeler, David K.; Brown, Kevin G.; Reamer, Irene A.; Vienna, John D. et al.
Object Type:
Report
System:
The UNT Digital Library
Welfare Reform: TANF Trends and Data
None
Date:
November 8, 2002
Creator:
Burke, Vee
Object Type:
Report
System:
The UNT Digital Library
Design and Field Test of a Galvanometer Deflected Streak Camera
We have developed a compact fieldable optically-deflected streak camera first reported in the 20th HSPP Congress. Using a triggerable galvanometer that scans the optical signal, the imaging and streaking function is an all-optical process without incurring any photon-electron-photon conversion or photoelectronic deflection. As such, the achievable imaging quality is limited mainly only by optical design, rather than by multiple conversions of signal carrier and high voltage electron-optics effect. All core elements of the camera are packaged into a 12 inch x 24 inch footprint box, a size similar to that of a conventional electronic streak camera. At LLNL's Site-300 Test Site, we have conducted a Fabry-Perot interferometer measurement of fast object velocity using this all-optical camera side-by-side with an intensified electronic streak camera. These two cameras are configured as two independent instruments for recording synchronously each branch of the 50/50 splits from one incoming signal. Given the same signal characteristics, the test result has undisputedly demonstrated superior imaging performance for the all-optical streak camera. It produces higher signal sensitivity, wider linear dynamic range, better spatial contrast, finer temporal resolution, and larger data capacity as compared with that of the electronic counterpart. The camera had also demonstrated its structural robustness and …
Date:
November 8, 2002
Creator:
Lai, Ching C.; Goosman, David R.; Wade, James T. & Avara, Rex
Object Type:
Article
System:
The UNT Digital Library
ImBuild II: Impact of Technologies on Energy Efficiency Programs
This report documents IMBUILD II, the "next generation" of a special-purpose version of the Benchmark national I-O model, designed specifically to estimate the employment and income effects of building and other energy-saving technologies and programs of the U.S. Department of Energy's Office of Energy Efficiency and Renewable Energy. In comparison with the previous version of IMBUILD, this version allows for more complete and automated analysis of the essential features of energy efficiency investments in buildings, industry, and the electric power sectors.
Date:
July 8, 2002
Creator:
Scott, Michael J.; Roop, Joseph M. & Schultz, Robert W.
Object Type:
Report
System:
The UNT Digital Library
Impact of HLW Glass Crystallinity on the PCT Response
Optimizing glass formulation for vitrifying waste is based on computing a glass composition that would meet processability and acceptability constraints imposed on glass properties and composition while maximizing system efficiency. The process currently employed allows for estimation of all limiting glass properties except for the normalized element releases (ri, where i = B, Na, or Li) by the product consistency test (PCT) from glasses subjected to canister centerline cooling (CCC). This report documents a suggested approach to include this key glass property in numerical glass optimization. It shows that acceptable predictions of rB and rNa from CCC glasses can be obtained provided that sufficiently accurate compositions and concentrations of the crystalline phases in CCC glass are known.
Date:
August 8, 2002
Creator:
Riley, Brian J.; Rosario, Jose A. & Hrma, Pavel R.
Object Type:
Report
System:
The UNT Digital Library
Civic Programs in Washington, D.C.
This report highlights six of the most pupular programs among a number of programs in Washington D.C., explain the workings of the national government to a diverse range of Americans, from middle school to senior citizens.
Date:
April 8, 2002
Creator:
Greenfield, Susan W.
Object Type:
Report
System:
The UNT Digital Library
Electronically Unsaturated Three-Coordinate Chloride and Methyl Complexes of Iron, Cobalt, and Nickel
This article discusses electronically unsaturated three-coordinate chloride and methyl complexes of iron, cobalt, and nickel.
Date:
November 8, 2002
Creator:
Holland, Patrick L.; Cundari, Thomas R., 1964-; Perez, Lanyn L.; Eckert, Nathan A. & Lachicotte, Rene J.
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 2002-11-08 – Collegium Musicum
Concert presented at the UNT College of Music Recital Hall.
Date:
November 8, 2002
Creator:
University of North Texas. Baroque Orchestra.
Object Type:
Sound
System:
The UNT Digital Library
Solubility of Pyrene in Ternary Propanol + Butanol + Heptane Solvent Mixtures at 299.15 K
Article on the solubility of pyrene in ternary propanol + butanol + heptane solvent mixtures at 299.15 K.
Date:
November 8, 2002
Creator:
Fishback, Stephanie; Duenas, Sarah; Kuehn, Nancy; Pacheco, Jessica & Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
Ensemble: 2002-03-08 – Symphonic Band
Access:
Use of this item is restricted to the UNT Community
Ensemble performance at the UNT College of Music Winspear Hall.
Date:
March 8, 2002
Creator:
University of North Texas. Symphonic Band.
Object Type:
Sound
System:
The UNT Digital Library