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81891 - A New Class of Solvents for TRU Dissolution and Separation: Ionic Liquids
Through the current EMSP funding, solvent extraction technologies based on liquid-liquid partitioning of TRU to an Ionic Liquid phase containing conventional complexants has been shown to be viable. The growing understanding of the role that the different components of an ionic liquid can have on the partitioning mechanism, and on the nature of the subsequent dissolved species indicates strongly that ionic liquids are not necessarily direct replacements for volatile or otherwise hazardous organic solvents. Separations and partitioning can be exceptionally complex with competing solvent extraction, cation, anion and sacrificial ion exchange mechanisms are all important, depending on the selection of components for formation of the ionic liquid phase, and that control of these competing mechanisms can be utilized to provide new, alternative separations schemes.
Date:
December 10, 2004
Creator:
Rogers, Robin D.
Object Type:
Report
System:
The UNT Digital Library
[Absent students are represented by their empty desks]
A photo of a classroom with several students visible, working individually at their desks. There are computers and a blackboard at the front of the classroom and locks on the side of the room. Three empty desks highlight the absence of multiple students.
Date:
December 10, 2004
Creator:
Castillo, José L.
Object Type:
Photograph
System:
The Portal to Texas History
Altus Times (Altus, Okla.), Vol. 106, No. 210, Ed. 1 Friday, December 10, 2004
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 10, 2004
Creator:
Andrews, Mike
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Anticircumvention under the Digital Millennium Copyright Act and Reverse Engineering: Recent Legal Developments
Defines the Digital Millennium Copyright Act (DMCA) and practice of reverse engineering. The report is categorized into five categories, (I) Background, (II) Exceptions to the copyright monopoly: reverse engineering, (lll) Lexmark International v. Static Control Components, Inc, (lV) Chamberlain Group, Inc. v. Skylink Technologies, Inc, and (V) Conclusion
Date:
December 10, 2004
Creator:
Jeweler, Robin
Object Type:
Report
System:
The UNT Digital Library
Appropriations for FY2005: Energy and Water Development
This report is a guide to the Energy and Water Development appropriations bill, including the funding for civil works projects of the Army Corps of Engineers (Corps), the Department of the Interior's Bureau of Reclamation (BOR), most of the Department of Energy (DOE), and a number of independent agencies.
Date:
December 10, 2004
Creator:
Behrens, Carl
Object Type:
Report
System:
The UNT Digital Library
Armenia, Azerbaijan, and Georgia: Political Developments and Implications for U.S. Interests
The United States recognized the independence of all the former Soviet republics by the end of 1991, including the South Caucasus states of Armenia, Azerbaijan, and Georgia. The United States has fostered these states' ties with the West in part to end the dependence of these states on Russia for trade, security, and other relations. The FREEDOM Support Act of 1992 provides authorization for assistance to the Eurasian states for humanitarian needs, democratization, and other purposes. In the aftermath of the September 11, 2001, terrorist attacks on the United States, the Administration appealed for a national security waiver of the prohibition on aid to Azerbaijan, in consideration of Azerbaijan's assistance to the international coalition to combat terrorism. Azerbaijani and Georgian troops participate in stabilization efforts in Afghanistan and Iraq, and Armenian personnel serve in Iraq.
Date:
December 10, 2004
Creator:
Nichol, Jim
Object Type:
Report
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 84, No. 5, Ed. 1 Friday, December 10, 2004
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
December 10, 2004
Creator:
Cash, Wanda Garner
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Hill Country Recorder (Boerne, Tex.), Vol. 98, No. 87, Ed. 1 Friday, December 10, 2004
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
December 10, 2004
Creator:
Watson, Steven G.
Object Type:
Newspaper
System:
The Portal to Texas History
Brady Standard-Herald and Heart O' Texas News (Brady, Tex.), Ed. 1 Friday, December 10, 2004
Semiweekly newspaper from Brady, Texas that includes local, state, and national news along with advertising.
Date:
December 10, 2004
Creator:
Stewart, James E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Clifton Record (Clifton, Tex.), Vol. 109, No. 59, Ed. 1 Friday, December 10, 2004
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
December 10, 2004
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
Comparing Shape and Texture Features for Pattern Recognition in Simulation Data
Shape and texture features have been used for some time for pattern recognition in datasets such as remote sensed imagery, medical imagery, photographs, etc. In this paper, we investigate shape and texture features for pattern recognition in simulation data. In particular, we explore which features are suitable for characterizing regions of interest in images resulting from fluid mixing simulations. Three texture features--gray level co-occurrence matrices, wavelets, and Gabor filters--and two shape features--geometric moments and the angular radial transform--are compared. The features are evaluated using a similarity retrieval framework. Our preliminary results indicate that Gabor filters perform the best among the texture features and the angular radial transform performs the best among the shape features. The feature which performs the best overall is dependent on how the groundtruth dataset is created.
Date:
December 10, 2004
Creator:
Newsam, S & Kamath, C
Object Type:
Article
System:
The UNT Digital Library
Dallas Voice (Dallas, Tex.), Vol. 21, No. 31, Ed. 1 Friday, December 10, 2004
Weekly newspaper from Dallas, Texas that includes local, state, and national news and advertising of interest to the Lesbian, Gay, Bisexual, and Transgender (LGBT) community.
Date:
December 10, 2004
Creator:
Vercher, Dennis
Object Type:
Newspaper
System:
The UNT Digital Library
Defense Outsourcing: The OMB Circular A-76 Policy
This report provides information on the Office of Management and Budget’s (OMB) Circular A-76, “Performance of Commercial Activities,” and the impact of a related reform initiative, the Federal Activities Inventory Reform Act (FAIR) of 1998, within the Department of Defense. The Circular defines federal policy for determining whether recurring commercial activities should be outsourced to commercial sources, Governmental facilities, or through inter-service support agreements. The FAIR Act creates statutory reporting requirements for federal executive agencies, by requiring Federal executive agencies to identify activities “not inherently governmental” and consider outsourcing through managed competitions. However, FAIR does not require that agencies contract out these activities.
Date:
December 10, 2004
Creator:
Grasso, Valerie Bailey
Object Type:
Report
System:
The UNT Digital Library
Direct observation of surface ethyl to ethane interconversion uponC2H4 hydrogenation over Pt/Al2O3 catalyst by time-resolved FT-IRspectroscopy
Time-resolved FT-IR spectra of ethylene hydrogenation over alumina-supported Pt catalyst were recorded at 25 ms resolution in the temperature range 323 to 473 K using various H2 flow rates (1 atm total gas pressure). Surface ethyl species (2870 and 1200 cm-1) were detected at all temperatures along with the gas phase ethane product (2954 and 2893 cm-1). The CH3CH2Pt growth was instantaneous on the time scale of 25ms under all experimental conditions. At 323 K, the decay time of surface ethyl (122 + 10 ms) coincides with the rise time of C2H6 (144 + 14 ms).This establishes direct kinetic evidence for surface ethyl as the kinetically relevant intermediate. Such a direct link between the temporal behavior of an observed intermediate and the final product growth in a heterogeneous catalytic system has not been demonstrated before to our knowledge. A fraction (10 percent) of the asymptotic ethane growth at 323 K is prompt, indicating that there are surface ethyl species that react much faster than the majority of the CH3CH2Pt intermediates. The dispersive kinetics is attributed to the varying strength of interaction of the ethyl species with the Pt surface caused by heterogeneity of the surface environment. At 473 K, the …
Date:
December 10, 2004
Creator:
Wasylenko, Walter & Frei, Heinz
Object Type:
Article
System:
The UNT Digital Library
Effect of Multi-Shot X-Ray Exposures in IFE Armor Materials
As part of the High Average Power Laser (HAPL) program the performance of tungsten as an armor material is being studied. While the armor would be exposed to neutrons, x-rays and ions within an inertial fusion energy (IFE) power plant, the thermomechanical effects are believed to dominate. Using a pulsed x-ray source, long-term exposures of tungsten have been completed at fluences that are of interest for the IFE application. Modeling is used in conjunction with experiments on the XAPPER x-ray damage facility in an effort to recreate the effects that would be expected in an operating IFE power plant. X-ray exposures have been completed for a variety of x-ray fluences and number of shots. Analysis of the samples suggests that surface roughening has a threshold that is very close to the fluences that reproduce the peak temperatures expected in an IFE armor material.
Date:
December 10, 2004
Creator:
Latkowski, J. F.; Abbott, R. P.; Schmitt, R. C. & Bell, B. K.
Object Type:
Article
System:
The UNT Digital Library
Effects of polar solvents on the fracture resistance of dentin: Role of water hydration
Although healthy dentin is invariably hydrated in vivo, from a perspective of examining the mechanisms of fracture in dentin, it is interesting to consider the role of water hydration. Furthermore, it is feasible that exposure to certain polar solvents, e.g., those found in clinical adhesives, can induce dehydration. In the present study, in vitro deformation and fracture experiments, the latter involving a resistance-curve (R-curve) approach (i.e., toughness evolution with crack extension), were conducted in order to assess changes in the constitutive and fracture behavior induced by three common solvents - acetone, ethanol and methanol. In addition, nanoindentation-based experiments to evaluate the deformation behavior at the level of individual collagen fibers and ultraviolet Raman spectroscopy to evaluate changes in bonding were performed. The results indicate a reversible effect of chemical dehydration, with increased fracture resistance, strength, and stiffness associated with lower hydrogen bonding ability of the solvent. These results are analyzed both in terms of intrinsic and extrinsic toughening phenomena to further understand the micromechanisms of fracture in dentin and the specific role of water hydration.
Date:
December 10, 2004
Creator:
Ritchie, R. O.; Nalla, R. K.; Balooch, M.; Ager, J. W., III; Kruzic, J. J. & Kinney, J. H.
Object Type:
Article
System:
The UNT Digital Library
Electronic Government: Federal Agencies Have Made Progress Implementing the E-Government Act of 2002
A letter report issued by the Government Accountability Office with an abstract that begins "The E-Government Act (E-Gov Act) of 2002 was enacted with the general purpose of promoting better use of the Internet and other information technologies to improve government services for citizens, internal government operations, and opportunities for citizen participation in government. Among other things, the act specifically requires the establishment of the Office of Electronic Government within the Office of Management and Budget (OMB) to oversee implementation of the act's provisions and mandates a number of specific actions, such as the establishment of interagency committees, completion of several studies, submission of reports with recommendations, issuance of a variety of guidance documents, establishment of new policies, and initiation of pilot projects. Further, the act requires federal agencies to take a number of actions, such as conducting privacy impact assessments, providing public access to agency information, and allowing for electronic access to rulemaking proceedings. OMB has linked several of the act's provisions to ongoing e-government initiatives that it has sponsored. While some deadlines specified in the act have passed, many required actions do not have statutory deadlines or have deadlines that have not yet passed. This report responds to …
Date:
December 10, 2004
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Experimental astrophysics with high power lasers and Z pinches
With the advent of high energy density (HED) experimental facilities, such as high-energy lasers and fast Z-pinch, pulsed-power facilities, mm-scale quantities of matter can be placed in extreme states of density, temperature, and/or velocity. This has enabled the emergence of a new class of experimental science, HED laboratory astrophysics, wherein the properties of matter and the processes that occur under extreme astrophysical conditions can be examined in the laboratory. Areas particularly suitable to this class of experimental astrophysics include the study of opacities relevant to stellar interiors; equations of state relevant to planetary interiors; strong shock driven nonlinear hydrodynamics and radiative dynamics, relevant to supernova explosions and subsequent evolution; protostellar jets and high Mach-number flows; radiatively driven molecular clouds and nonlinear photoevaporation front dynamics; and photoionized plasmas relevant to accretion disks around compact objects, such as black holes and neutron stars.
Date:
December 10, 2004
Creator:
Remington, B. A.; Drake, R. P. & Ryutov, D. D.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, December 10, 2004
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
December 10, 2004
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Federal Communications Commission: Federal Advisory Committees Follow Requirements, but FCC Should Improve Its Process for Appointing Committee Members
A letter report issued by the Government Accountability Office with an abstract that begins "FCC has regulatory authority over many complex telecommunications issues. To obtain expert advice on these issues, FCC often calls upon its federal advisory committees, comprised mostly of members from industry, private consulting, advocacy groups, and government. These committees must follow the Federal Advisory Committee Act (FACA), which sets requirements on the formation and operation of such committees. Because of Congressional interest in how FCC receives advice from outside experts, this report provides information on (1) FCC's current advisory committees, (2) the extent to which the committees follow applicable laws, (3) how FCC makes use of the committees' advice, and (4) the non-FACA advisory groups that FCC has established."
Date:
December 10, 2004
Creator:
United States. Government Accountability Office.
Object Type:
Report
System:
The UNT Digital Library
Final Technical Report EMSP 70045 Investigation of Pore Scale Processes That Affect Soil Vapor Extraction
Dense nonaqueous phase liquid (DNAPL) contamination in the vadose zone is a significant problem at Department of Energy sites. Soil vapor extraction (SVE) is commonly used to remediate DNAPLs from the vadose zone. In most cases, a period of high recovery has been followed by a sustained period of low recovery. This behavior has been attributed to multiple processes including slow interphase mass transfer, retarded vapor phase transport, and diffusion from unswept zones of low permeability. This research project used a combination of laboratory experimentation and mathematical modeling to determine how these various processes interact to limit the removal of DNAPL components in heterogeneous porous media during SVE. Our results were applied to scenarios typical of the carbon tetrachloride spill zone at the Hanford Site. Our results indicate that: (a) the initial distribution of the spilled DNAPL (i.e., the spill-zone architecture) has a major influence upon the performance of any subsequent SVE operations; (b) while the pattern of higher and lower conductivity soil zones has an important impact upon spill zone architecture, soil moisture distribution plays an even larger role when there are large quantities of co-disposed waste-water (as in the Hanford scenario); (c) depending upon soil moisture dynamics, liquid …
Date:
December 10, 2004
Creator:
Valocchi, Albert J.; Werth, Charles W. & Webb, Andrew W.
Object Type:
Report
System:
The UNT Digital Library
First tests of a Micromegas TPC in a magnetic field
Since the summer of 2003, a large Micromegas TPC prototype (1000 channels, 50 cm drift, 50 cm diameter) has been operated in a 2T superconducting magnet at Saclay. A description of this apparatus and first results from cosmic ray tests are presented. Additional measurements using simpler detectors with a laser source, an X-ray gun and radio-active sources are discussed. Drift velocity and gain measurements, electron attachment and aging studies for a Micromegas TPC are presented. In particular, using simulations and measurements, it is shown that an $Argon-CF_4$ mixture is optimal for operation at a future Linear Collider.
Date:
December 10, 2004
Creator:
Colas, P.; Giomataris, I.; Lepeltier, V. & Ronan, M.
Object Type:
Article
System:
The UNT Digital Library
FY2005 Budget: Chronology and Web Guide
None
Date:
December 10, 2004
Creator:
Murray, Justin
Object Type:
Report
System:
The UNT Digital Library
GEOGRAPHIC INFORMATION SYSTEM APPROACH FOR PLAY PORTFOLIOS TO IMPROVE OIL PRODUCTION IN THE ILLINOIS BASIN
Oil and gas have been commercially produced in Illinois for over 100 years. Existing commercial production is from more than fifty-two named pay horizons in Paleozoic rocks ranging in age from Middle Ordovician to Pennsylvanian. Over 3.2 billion barrels of oil have been produced. Recent calculations indicate that remaining mobile resources in the Illinois Basin may be on the order of several billion barrels. Thus, large quantities of oil, potentially recoverable using current technology, remain in Illinois oil fields despite a century of development. Many opportunities for increased production may have been missed due to complex development histories, multiple stacked pays, and commingled production which makes thorough exploitation of pays and the application of secondary or improved/enhanced recovery strategies difficult. Access to data, and the techniques required to evaluate and manage large amounts of diverse data are major barriers to increased production of critical reserves in the Illinois Basin. These constraints are being alleviated by the development of a database access system using a Geographic Information System (GIS) approach for evaluation and identification of underdeveloped pays. The Illinois State Geological Survey has developed a methodology that is being used by industry to identify underdeveloped areas (UDAs) in and around petroleum …
Date:
December 10, 2004
Creator:
Seyler, Beverly & Grube, John
Object Type:
Report
System:
The UNT Digital Library