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CRYSTALLIZATION IN MULTICOMPONENT GLASSES
In glass processing situations involving glass crystallization, various crystalline forms nucleate, grow, and dissolve, typically in a nonuniform temperature field of molten glass subjected to convection. Nuclear waste glasses are remarkable examples of multicomponent vitrified mixtures involving partial crystallization. In the glass melter, crystals form and dissolve during batch-to-glass conversion, melter processing, and product cooling. Crystals often agglomerate and sink, and they may settle at the melter bottom. Within the body of cooling glass, multiple phases crystallize in a non-uniform time-dependent temperature field. Self-organizing periodic distribution (the Liesegnang effect) is common. Various crystallization phenomena that occur in glass making are reviewed.
Date:
October 8, 2009
Creator:
AA, KRUGER & PR, HRMA
Object Type:
Article
System:
The UNT Digital Library
[Abilene City Council Minutes: 2009]
Ledger containing minutes of the City Council in Abilene, Texas documenting the group's discussions and activities from January 8, 2009 to December 17, 2009.
Date:
2009-01-08/2009-12-17
Creator:
Abilene (Tex.)
Object Type:
Book
System:
The Portal to Texas History
A high-performance electron beam ion source
At Brookhaven National Laboratory, a high current Electron Beam Ion Source (EBIS) has been developed as part of a new preinjector that is under construction to replace the Tandem Van de Graaffs as the heavy ion preinjector for the RHIC and NASA experimental programs. This preinjector will produce milliampere-level currents of essentially any ion species, with q/A {ge} 1/6, in short pulses, for injection into the Booster synchrotron. In order to produce the required intensities, this EBIS uses a 10A electron gun, and an electron collector designed to handle 300 kW of pulsed electron beam power. The EBIS trap region is 1.5 m long, inside a 5T, 2m long, 8-inch bore superconducting solenoid. The source is designed to switch ion species on a pulse-to-pulse basis, at a 5 Hz repetition rate. Singly-charged ions of the appropriate species, produced external to the EBIS, are injected into the trap and confined until the desired charge state is reached via stepwise ionization by the electron beam. Ions are then extracted and matched into an RFQ, followed by a short IH Linac, for acceleration to 2 MeV/A, prior to injection into the Booster synchrotron. An overview of the preinjector is presented, along with experimental …
Date:
June 8, 2009
Creator:
Alessi,J.; Beebe, E.; Bellavia, S.; Gould, O.; Kponou, A.; Lambiase, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 27, No. 1, Ed. 1 Thursday, January 8, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
January 8, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 28, No. 40, Ed. 1 Thursday, October 8, 2009
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
October 8, 2009
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Corrosion Monitoring in Hanford Nuclear Waste Storage Tanks Design and Data From 241-an-102 Multi-Probe Corrosion Monitoring System
In 2008, a new Multi-Probe Corrosion Monitoring System (MPCMS) was installed in double-shell tank 241-AN-102 on the U.S. Department of Energy's Hanford Site in Washington State. Developmental design work included laboratory testing in simulated tank 241-AN-102 waste to evaluate metal performance for installation on the MPCMS as secondary metal reference electrodes. The MPCMS design includes coupon arrays as well as a wired probe which facilitates measurement of tank potential as well as corrosion rate using electrical resistance (ER) sensors. This paper presents the MPCMS design, field data obtained following installation of the MPCMS in tank 241-AN-102, and a comparison between laboratory potential data obtained using simulated waste and tank potential data obtained following field installation.
Date:
January 8, 2009
Creator:
Anda, V. S.; Edgemon, G. L.; Hagensen, A. R.; Boomer, K. D. & Carothers, K. G.
Object Type:
Article
System:
The UNT Digital Library
Kalispel Resident Fish Project : Annual Report, 2008.
In 2008, the Kalispel Natural Resource Department (KNRD) continued to implement its habitat enhancement projects for bull trout (Salvelinus confluentus) and westslope cutthroat trout (Oncorhynchus clarki lewisi). Baseline fish population and habitat assessments were conducted in Upper West Branch Priest River. Additional fish and habitat data were collected for the Granite Creek Watershed Assessment, a cooperative project between KNRD and the U.S. Forest Service Panhandle National Forest (FS) . The watershed assessment, funded primarily by the Salmon Recovery Funding Board of the State of Washington, will be completed in 2009.
Date:
July 8, 2009
Creator:
Andersen, Todd
Object Type:
Report
System:
The UNT Digital Library
Search for B^0 meson decays to \pi^0 K^0_S K^0_S, \eta K^0_S K^0_S, and \eta^{\prime}K^0_S K^0_S
We describe searches for B{sup 0} meson decays to the charmless final states {pi}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0}, {eta}K{sub S}{sup 0}K{sub S}{sup 0}, and {eta}{prime}K{sub S}{sup 0}K{sub S}{sup 0}. The data sample corresponds to 467 x 10{sup 6} B{bar B} pairs produced in e{sup +}e{sup -} annihilation and collected with the BABAR detector at the SLAC National Accelerator Laboratory. We find no significant signals and determine the 90% confidence level upper limits on the branching fractions, in units of 10{sup -7}, {Beta}(B{sup 0} {yields} {pi}{sup 0}K{sub S}{sup 0}K{sub S}{sup 0}) < 12, {Beta}(B{sup 0} {yields} {eta}K{sub S}{sup 0}K{sub S}{sup 0}) < 10, and {Beta}(B{sup 0} {yields} {eta}{prime}K{sub S}{sup 0}K{sub S}{sup 0}) < 20.
Date:
May 8, 2009
Creator:
Aubert, B.
Object Type:
Article
System:
The UNT Digital Library
Sheet Beam Klystron Instability Analysis
Using the principle of energy balance we develop a 2D theory for calculating growth rates of instability in a two-cavity model of a sheet beam klystron. An important ingredient is a TE-like mode in the gap that also gives a longitudinal kick to the beam. When compared with a self-consistent particle-in-cell calculation, with sheet beam klystron-type parameters, agreement is quite good up to half the design current, 65 A; at full current, however, other, current-dependent effects come in and the results deviate significantly.
Date:
May 8, 2009
Creator:
Bane, K. L. F.; Jensen, A.; Li, Z.; Stupakov, G. & Adolphsen, C.
Object Type:
Article
System:
The UNT Digital Library
Development of pseudo-random binary arrays for calibration of surface profile metrology tools
Optical Metrology tools, especially for short wavelength (EUV and X-Ray), must cover a wide range of spatial frequencies from the very low, which affects figure, to the important mid-spatial frequencies and the high spatial frequency range, which produces undesirable scattering. A major difficulty in using surface profilometers arises due to the unknown Point-Spread Function (PSF) of the instruments [1] that is responsible for distortion of the measured surface profile. Generally, the distortion due to the PSF is difficult to account because the PSF is a complex function that comes to the measurement via the convolution operation, while the measured profile is described with a real function. Accounting for instrumental PSF becomes significantly simpler if the result of measurement of a profile is presented in a spatial frequency domain as a Power Spectral Density (PSD) distribution [2]. For example, the measured PSD distributions provide a closed set of data necessary for three-dimensional calculations of scattering of light by the optical surfaces [3], [4]. The distortion of the surface PSD distribution due to the PSF can be modeled with the Modulation Transfer Function (MTF), which is defined over the spatial frequency bandwidth of the instrument [1], [2]. The measured PSD distribution can …
Date:
June 8, 2009
Creator:
Barber, Samuel K.; Soldate, Paul; Anderson, Erik H.; Cambie, Rossana; McKinney, Wayne R.; Takacs, Peter Z. et al.
Object Type:
Article
System:
The UNT Digital Library
Pacific Northwest National Laboratory Facility Radionuclide Emission Points and Sampling Systems
Battelle—Pacific Northwest Division operates numerous research and development laboratories in Richland, Washington, including those associated with the Pacific Northwest National Laboratory (PNNL) on the Department of Energy’s Hanford Site that have the potential for radionuclide air emissions. The National Emission Standard for Hazardous Air Pollutants (NESHAP 40 CFR 61, Subparts H and I) requires an assessment of all effluent release points that have the potential for radionuclide emissions. Potential emissions are assessed annually. Sampling, monitoring, and other regulatory compliance requirements are designated based upon the potential-to-emit dose criteria found in the regulations. The purpose of this document is to describe the facility radionuclide air emission sampling program and provide current and historical facility emission point system performance, operation, and design information. A description of the buildings, exhaust points, control technologies, and sample extraction details is provided for each registered or deregistered facility emission point. Additionally, applicable stack sampler configuration drawings, figures, and photographs are provided.
Date:
April 8, 2009
Creator:
Barfuss, Brad C.; Barnett, J. M. & Ballinger, Marcel Y.
Object Type:
Report
System:
The UNT Digital Library
Proliferation Resistance and Physical Protection Evaluation Methodology Development and Applications
An overview of the technical progress and accomplishments on the evaluation methodology for proliferation resistance and physical protection of Generation IV nuclear energy Systems.
Date:
July 8, 2009
Creator:
Bari, Robert A.; Peterson, Per F.; Therios, Ike U. & Whitlock, Jeremy
Object Type:
Report
System:
The UNT Digital Library
The Animal Welfare Act: Background and Selected Legislation
None
Date:
December 8, 2009
Creator:
Becker, Geoffrey S.
Object Type:
Report
System:
The UNT Digital Library
"Research to Improve the Efficacy of Captive Broodstock Programs and Advance Hatchery Reform Throughout the Columbia River Basin." [from the Abstract], 2007-2008 Annual Progress Report.
This project was developed to conduct research to improve the efficacy of captive broodstock programs and advance hatchery reform throughout the Columbia river basin. The project has three objectives: (1) maintain adaptive life history characteristics in Chinook salmon, (2) improve imprinting in juvenile sockeye salmon, and (3) match wild phenotypes in Chinook and sockeye salmon reared in hatcheries. A summary of the results are as follows: Objective 1: Adult and jack Chinook salmon males were stocked into four replicate spawning channels at a constant density (N = 16 per breeding group), but different ratios, and were left to spawn naturally with a fixed number of females (N = 6 per breeding group). Adult males obtained primary access to females and were first to enter the nest at the time of spawning. Jack male spawning occurred primarily by establishing satellite positions downstream of the courting pair, and 'sneaking' into the nest at the time of spawning. Male dominance hierarchies were fairly stable and strongly correlated with the order of nest entry at the time of spawning. Spawning participation by jack and adult males is consistent with a negative frequency dependent selection model, which means that selection during spawning favors the rarer …
Date:
April 8, 2009
Creator:
Berejikian, Barry A.
Object Type:
Report
System:
The UNT Digital Library
"The Success of Captive Broodstock Programs Depends on High In-Culture Survival, ..." [from the Abstract], 2006-2007 Progress Report.
The success of captive broodstock programs depends on high in-culture survival, appropriate development of the reproductive system, and the behavior and survival of cultured salmon after release, either as adults or juveniles. Continuing captive broodstock research designed to improve technology is being conducted to cover all major life history stages of Pacific salmon. Accomplishments detailed in this report are listed below by major objective. Objective 1: This study documented that captively reared Chinook exhibited spawn timing similar to their founder anadromous population. An analysis of spawn timing data of captively reared Chinook salmon that had received different levels of antibiotic treatment did not suggest that antibiotic treatments during the freshwater or seawater phase of the life cycle affects final maturation timing. No effect of rearing density was found with respect to spawn timing or other reproductive behaviors. Objective 2: This study investigated the critical period(s) for imprinting for sockeye salmon by exposing juvenile salmon to known odorants at key developmental stages. Molecular assessments of imprinting-induced changes in odorant receptor gene expression indicated that regulation of odorant expression differs between coho and sockeye salmon. While temporal patterns differ between these species, exposure to arginine elicited increases in odorant receptor mRNA expression …
Date:
April 8, 2009
Creator:
Berejikian, Barry A.
Object Type:
Report
System:
The UNT Digital Library
The National Security Council: An Organizational Assessment
The National Security Council (NSC) was established in 1947. This report describes the history of the NSC, how is structure and influence have varied over the years from one Administration to another, what its current structure and who its current members are, varying opinions as to what the role of the NSC should be, and future developments for the NSC.
Date:
June 8, 2009
Creator:
Best, Richard A., Jr.
Object Type:
Report
System:
The UNT Digital Library
Results from the B Factories
These proceedings are based on lectures given at the Helmholtz International Summer School Heavy Quark Physics at the Bogoliubov Laboratory of Theoretical Physics, Dubna, Russia, during August 2008. I review the current status of CP violation in B meson decays from the B factories. These results can be used, along with measurements of the sides of the Unitarity Triangle, to test the CKM mechanism. In addition I discuss experimental studies of B decays to final states with 'spin-one' particles.
Date:
January 8, 2009
Creator:
Bevan, A. & /Queen Mary, U. of London
Object Type:
Article
System:
The UNT Digital Library
The UNESCO World Heritage Convention: Congressional Issues
This report provides background information on the World Heritage Convention, outlines U.S. participation and funding, and highlights criteria for adding and removing sites from the World Heritage Lists. It also discusses possible issues for the 111th Congress.
Date:
December 8, 2009
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
[Clipping: "Let's say 'we do' to the business of gay divorce"]
Newspaper clipping from the metro section of the Dallas Morning News published October 8th, 2009. The clipping features an article on a new law allowing gay divorce to be legal in the state of Texas without recognizing gay marriage. Journalist Steve Blow outlines his article from the comedic standpoint to point out the absurdity of the loophole and pin it on the then attorney general Greg Abbott.
Date:
October 8, 2009
Creator:
Blow, Steve
Object Type:
Clipping
System:
The UNT Digital Library
Oral History Interview with Albert W. Boam, December 8, 2009
Transcript of an oral interview with Albert W. Boam. Born in 1923, he enlisted as an Aviation Cadet in the Army Air Corps in 1942. He attended gunnery school at Buckingham Army Air Base in Naples, Florida. He describes his navigation training at Selman Field in Monroe, Louisiana. He was assigned to the 846th Squadron, 489th Bomb Group, 95th Combat Wing, 8th Air Force. He describes the flying the Southern Route to England as well as the navigation methods used. In 1944, he flew thirty-one missions as the navigator on a B-24 bomber. He talks about missions over France and Germany with targets such as shipyards and submarine pens. He describes his thirty-first mission in which his plane was led off course by a Pathfinder and damaged by antiaircraft artillery. He bailed out and was captured near German-controlled Hagenau in the Alsace region. He talks about his interrogation. He describes life and conditions in Stalag Luft III. In early 1945, the POW camp was evacuated by the Germans because the Russians were advancing from the east. He describes the forced march and traveling in a boxcar to a POW camp (Stalag VIII D) in Nuremburg as well as conditions at …
Date:
December 8, 2009
Creator:
Boam, Albert W.
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Albert W. Boam, December 8, 2009
Transcript of an oral interview with Albert W. Boam. Born in 1923, he enlisted as an Aviation Cadet in the Army Air Corps in 1942. He attended gunnery school at Buckingham Army Air Base in Naples, Florida. He describes his navigation training at Selman Field in Monroe, Louisiana. He was assigned to the 846th Squadron, 489th Bomb Group, 95th Combat Wing, 8th Air Force. He describes the flying the Southern Route to England as well as the navigation methods used. In 1944, he flew thirty-one missions as the navigator on a B-24 bomber. He talks about missions over France and Germany with targets such as shipyards and submarine pens. He describes his thirty-first mission in which his plane was led off course by a Pathfinder and damaged by antiaircraft artillery. He bailed out and was captured near German-controlled Hagenau in the Alsace region. He talks about his interrogation. He describes life and conditions in Stalag Luft III. In early 1945, the POW camp was evacuated by the Germans because the Russians were advancing from the east. He describes the forced march and traveling in a boxcar to a POW camp (Stalag VIII D) in Nuremburg as well as conditions at …
Date:
December 8, 2009
Creator:
Boam, Albert W.
Object Type:
Text
System:
The Portal to Texas History
Master's Recital: 2009-03-08 - Jennifer Boyer, soprano
Access:
Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Master of Music (MM) degree.
Date:
March 8, 2009
Creator:
Boyer, Jennifer
Object Type:
Sound
System:
The UNT Digital Library
Analytical SuperSTEM for extraterrestrial materials research
Electron-beam studies of extraterrestrial materials with significantly improved spatial resolution, energy resolution and sensitivity are enabled using a 300 keV SuperSTEM scanning transmission electron microscope with a monochromator and two spherical aberration correctors. The improved technical capabilities enable analyses previously not possible. Mineral structures can be directly imaged and analyzed with single-atomic-column resolution, liquids and implanted gases can be detected, and UV-VIS optical properties can be measured. Detection limits for minor/trace elements in thin (<100 nm thick) specimens are improved such that quantitative measurements of some extend to the sub-500 ppm level. Electron energy-loss spectroscopy (EELS) can be carried out with 0.10-0.20 eV energy resolution and atomic-scale spatial resolution such that variations in oxidation state from one atomic column to another can be detected. Petrographic mapping is extended down to the atomic scale using energy-dispersive x-ray spectroscopy (EDS) and energy-filtered transmission electron microscopy (EFTEM) imaging. Technical capabilities and examples of the applications of SuperSTEM to extraterrestrial materials are presented, including the UV spectral properties and organic carbon K-edge fine structure of carbonaceous matter in interplanetary dust particles (IDPs), x-ray elemental maps showing the nanometer-scale distribution of carbon within GEMS (glass with embedded metal and sulfides), the first detection and quantification …
Date:
September 8, 2009
Creator:
Bradley, J P & Dai, Z R
Object Type:
Article
System:
The UNT Digital Library
Conversation about 1950s Boro culture
This is a description of the cultural life of the Boros in Kokrajhar during the 1950s. Dialect: Standard Boro
Date:
May 8, 2009
Creator:
Brahma, Bihung
Object Type:
Sound
System:
The UNT Digital Library