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1,604 Matching Results
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Doctoral Recital: 2009-04-16 - Anthony Victor Bianchetta, tenor and alto trombones
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
April 16, 2009
Creator:
Bianchetta, Anthony Victor
Object Type:
Sound
System:
The UNT Digital Library
Basin-Scale Hydrologic Impacts of CO2 Storage: Regulatory and Capacity Implications
Industrial-scale injection of CO{sub 2} into saline sedimentary basins will cause large-scale fluid pressurization and migration of native brines, which may affect valuable groundwater resources overlying the deep sequestration reservoirs. In this paper, we discuss how such basin-scale hydrologic impacts can (1) affect regulation of CO{sub 2} storage projects and (2) may reduce current storage capacity estimates. Our assessment arises from a hypothetical future carbon sequestration scenario in the Illinois Basin, which involves twenty individual CO{sub 2} storage projects in a core injection area suitable for long-term storage. Each project is assumed to inject five million tonnes of CO{sub 2} per year for 50 years. A regional-scale three-dimensional simulation model was developed for the Illinois Basin that captures both the local-scale CO{sub 2}-brine flow processes and the large-scale groundwater flow patterns in response to CO{sub 2} storage. The far-field pressure buildup predicted for this selected sequestration scenario suggests that (1) the area that needs to be characterized in a permitting process may comprise a very large region within the basin if reservoir pressurization is considered, and (2) permits cannot be granted on a single-site basis alone because the near- and far-field hydrologic response may be affected by interference between individual …
Date:
April 2, 2009
Creator:
Birkholzer, J.T. & Zhou, Q.
Object Type:
Report
System:
The UNT Digital Library
Processing Materials Devices and Diagnostics for Thin Film Photovoltaics: Fundamental and Manufacturability Issues; Final Report, 5 September 2001 - 31 May 2008
The critical issues addressed in this study on CIGS, CdTe, and a-Si modules will provide the science and engineering basis for developing viable commercial processes and improved module performance.
Date:
April 1, 2009
Creator:
Birkmire, R. W.; Shafarman, W. N.; Eser, E.; Hegedus, S. S.; McCandless, B. E.; Dobson, K. D. et al.
Object Type:
Report
System:
The UNT Digital Library
Time-Resolved Molecular Frame Dynamics of Fixed-in-Space CS2 Molecules
Random orientation of molecules within a sample leads to blurred observationsof chemical reactions studied from the laboratory perspective. Methodsdeveloped for the dynamic imaging of molecular structures and processesstruggle with this, as measurements are optimally made in the molecular frame.Here we uselaser alignment to transiently fix CS2 molecules in space longenough to elucidate, in the molecular reference frame, details of ultrafast electronic vibrationaldynamics during a photochemical reaction. These three-dimensional photoelectron imaging results, combined with ongoing efforts in molecular alignment and orientation, presage a wide range of insights obtainable fromtime-resolved studies in the molecular frame.
Date:
April 2, 2009
Creator:
Bisgaard, Christer; Clarkin, Owen; Wu, Guorong; Lee, Anthony; Gessner, Oliver; Hayden, Carl et al.
Object Type:
Article
System:
The UNT Digital Library
[Flyer: Love Overboard]
Flyer advertising the theatrical performance of "Love Overboard," which was produced by the Black Academy of Arts and Letters on April 29 - May 3, 2009 at the Dallas Convention Center Theatre Complex.
Date:
April 2009
Creator:
Black Academy of Arts and Letters
Object Type:
Pamphlet
System:
The UNT Digital Library
[Program: 24-Hour Film Feast]
Program for a film festival produced by the Black Academy of Arts and Letters on April 18, 2009 at the Clarence Muse Cafe Theatre.
Date:
April 2009
Creator:
Black Academy of Arts and Letters
Object Type:
Pamphlet
System:
The UNT Digital Library
[Program: Comedy Night at the Muse]
Program for a comedy event produced by the Black Academy of Arts and Letters on April 24-25, 2009 at the Clarence Muse Cafe Theatre.
Date:
April 2009
Creator:
Black Academy of Arts and Letters
Object Type:
Pamphlet
System:
The UNT Digital Library
[Program: Pioneers]
Program for a lecture and performance produced by the Black Academy of Arts and Letters on April 4, 2009 at the Naomi Bruton Theater.
Date:
April 2009
Creator:
Black Academy of Arts and Letters
Object Type:
Pamphlet
System:
The UNT Digital Library
[Program: Voices of Poetry #8]
Program for a poetry event produced by the Black Academy of Arts and Letters on April 9, 2009 at the Clarence Muse Cafe Theatre.
Date:
April 2009
Creator:
Black Academy of Arts and Letters
Object Type:
Pamphlet
System:
The UNT Digital Library
Senior Recital: 2009-04-15 - James Blackwell, trumpet
Access:
Use of this item is restricted to the UNT Community
A senior recital presented at the UNT College of Music Kenton Hall.
Date:
April 15, 2009
Creator:
Blackwell, James
Object Type:
Sound
System:
The UNT Digital Library
Junior Recital: 2009-04-21 - Kristen Blair and Evan Black, voice
Access:
Use of this item is restricted to the UNT Community
Recital presented at the UNT College of Music Concert Hall in partial fulfillment of the Bachelor of Music (BM) degree.
Date:
April 21, 2009
Creator:
Blair, Kristen & Black, Evan
Object Type:
Sound
System:
The UNT Digital Library
Afghanistan: Narcotics and U.S. Policy
This report provides current statistical information, profiles the Afghanistan narcotics trade's participants, explores linkages between narcotics, insecurity, and corruption, and reviews U.S. and international policy responses since late 2001. The report also considers ongoing policy debates regarding the counternarcotics role of coalition military forces, poppy eradication, alternative livelihoods, and funding issues for Congress.
Date:
April 21, 2009
Creator:
Blanchard, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
Saudi Arabia: Background and U.S. Relations
The kingdom of Saudi Arabia, ruled by the Al Saud family since its founding in 1932, wields significant political and economic influence as the birthplace of the Islamic faith and by virtue of its large energy reserves. This report provides background information about Saudi Arabia and analyzes current issues in U.S.-Saudi relations.
Date:
April 30, 2009
Creator:
Blanchard, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
U.S. Policies on Iraq: CRS Experts
The following table provides access to names and contact information for CRS experts on policy concerns relating to Iraq. Policy areas identified include: U.S. policies on Iraq; governance in Iraq and U.S. military issues; refugees, internally displaced persons, and humanitarian assistance; prospects for Iraq's economy; resource and funding requirements; and the international context--the regional political and security environment.
Date:
April 6, 2009
Creator:
Blanchard, Christopher M.
Object Type:
Report
System:
The UNT Digital Library
The United Nations Convention on the Rights of the Child: Background and Policy Issues
This report provides an overview of the United Nations Convention on the Rights of the Child (CRC) and examines evolving U.S. policy toward the Convention, including past and current Administration positions and congressional perspectives. The report also highlights issues for the 111th Congress, including the Convention's possible impact on federal and state laws, U.S. sovereignty, parental rights, and U.S. family planning and abortion policy.
Date:
April 1, 2009
Creator:
Blanchfield, Luisa
Object Type:
Report
System:
The UNT Digital Library
Monitoring and Evaluation of Supplemented Spring Chinook Salmon and Life Histories of Wild Summer Steelhead in the Grande Ronde Basin, 2007 Annual Report.
This is the ninth annual report for a multi-year project designed to monitor and evaluate supplementation of endemic spring Chinook salmon in Catherine Creek and the upper Grande Ronde River. These two streams historically supported anadromous fish populations that provided significant tribal and non-tribal fisheries, but in recent years, have experienced severe declines in abundance. Conventional and captive broodstock supplementation methods are being used to restore these spring Chinook salmon populations. Spring Chinook salmon populations in Catherine Creek and the upper Grande Ronde River, and other streams in the Snake River Basin have experienced severe declines in abundance over the past two decades (Nehlsen et al. 1991). A supplementation program was initiated in Catherine Creek and the upper Grande Ronde River, incorporating the use of both captive and conventional broodstock methods, in order to prevent extinction in the short term and eventually rebuild populations. The captive broodstock component of the program (BPA Project 199801001) uses natural-origin parr collected by seining and reared to maturity at facilities near Seattle, Washington (Manchester Marine Laboratory) and Hood River, Oregon (Bonneville Hatchery). Spawning occurs at Bonneville Hatchery, and resulting progeny are reared in hatcheries. Shortly before outmigration in the spring, juveniles are transferred to …
Date:
April 10, 2009
Creator:
Boe, Stephen J.; Crump, Carrie A. & Weldert, Rey L.
Object Type:
Report
System:
The UNT Digital Library
Molecular Aspects of Transport in Thin Films of Controlled Architecture
Our laboratory focuses on developing spatially localized chemistries which can produce structures of controlled architecture on the supermolecular length scale -- structures which allow us to control the motion of molecular species with high spatial resolution, ultimately on nanometer length scales. Specifically, nanocapillary array membranes (NCAMs) contain an array of nanometer diameter pores connecting vertically separated microfluidic channels. NCAMs can manipulate samples with sub-femtoliter characteristic volumes and attomole sample amounts and are opening the field of chemical analysis of mass-limited samples, because they are capable of digital control of fluid switching down to sub-attoliter volumes; extension of analytical “unit operations” down to sub-femtomole sample sizes; and exerting spatiotemporal control over fluid mixing to enable studies of reaction dynamics. Digital flow switching mediated by nanocapillary array membranes can be controlled by bias, ionic strength, or pore diameter and is being studied by observing the temporal characteristics of transport across a single nanopore in thin PMMA membranes. The control of flow via nanopore surface characteristics, charge density and functional group presentation, is being studied by coupled conductivity and laser-induced fluorescence (LIF) measurements. Reactive mixing experiments previously established low millisecond mixing times for NCAM-mediated fluid transfer, and this has been exploited to demonstrate …
Date:
April 16, 2009
Creator:
Bohn, Paul W.
Object Type:
Report
System:
The UNT Digital Library
Navy-Marine Corps Strike-Fighter Shortfall: Background and Options for Congress
This report discusses congressional concerns about a projected inventory shortfall in Navy and Marine Corps strike-fighters. Some industry sources believe the shortfall is likely to be much larger than the Navy currently projects. Options for addressing the shortfall include extending strike-fighter service lives and increasing planned procurement of strike-fighters.
Date:
April 10, 2009
Creator:
Bolkcom, Christopher
Object Type:
Report
System:
The UNT Digital Library
Local structure and site occupancy of Cd and Hg substitutions in CeTIn_5 (T=Co, Rh, Ir)
The CeTIn_5 superconductors (T=Co, Rh, or Ir) have generated great interest due to their relatively high transition temperatures, non-Fermi liquid behavior, and their proximity to antiferromagnetic order and quantum critical points. In contrast to small changes with the T-species, electron doping in CeT(In_1-x M_x)_5 with $M$=Sn and hole doping with Cd or Hg have a dramatic effect on the electronic properties at very low concentrations. The present work reports local structure measurements usingthe extended x-ray absorption fine-structure (EXAFS) technique that address the substituent atom distribution as a function of T, M, and x, in the vicinity of the superconducting phase. Together with previous measurements for M=Sn, the proportion of the $M$ atom residing on the In(1) site, f_\textrm In(1), increases in the order M=Cd, Sn, and Hg, ranging from about 40\percent to 70percent, showing a strong preference for each of these substituents to occupy the In(1) site (random occupation = 20percent). In addition, f_In(1) ranges from 70percent to 100percent for M=Hg in the order T=Co,Rh, and Ir. These fractions track the changes in the atomic radii of the various species, and help explain the sharp dependence of $T_c$ on substituting into the In site. However, it is difficult to reconcile …
Date:
April 22, 2009
Creator:
Booth, Corwin H.; Bauer, Eric. D.; Bianchi, Andrea D.; Ronning, Fillip; Thompson, Joe D.; Sarrao, John L. et al.
Object Type:
Article
System:
The UNT Digital Library
Decamethylytterbocene Complexes of Bipyridines and Diazabutadienes: Multiconfigurational Ground States and Open-Shell Singlet Formation
Partial ytterbium f-orbital occupancy (i.e., intermediate valence) and open-shell singlet formation are established for a variety of bipyridine and diazabutadiene adducts with decamethylytterbocene, (C5Me5)2Yb, abbreviated as Cp*2Yb. Data used to support this claim include ytterbium valence measurements using Yb LIII-edge X-ray absorption near-edge structure spectroscopy, magnetic susceptibility, and complete active space self-consistent field (CASSCF) multiconfigurational calculations, as well as structural measurements compared to density functional theory calculations. The CASSCF calculations indicate that the intermediate valence is the result of a multiconfigurational ground-state wave function that has both an open-shell singlet f13(?*)1, where pi* is the lowest unoccupied molecular orbital of the bipyridine or dpiazabutadiene ligands, and a closed-shell singlet f14 component. A number of other competing theories for the unusual magnetism in these materials are ruled out by the lack of temperature dependence of the measured intermediate valence. These results have implications for understanding chemical bonding not only in organolanthanide complexes but also for f-element chemistry in general, as well as understanding magnetic interactions in nanoparticles and devices.
Date:
April 22, 2009
Creator:
Booth, Corwin H.; Walter, Marc D.; Kazhdan, Daniel; Hu, Yung-Jin; Lukens, Wayne W.; Bauer, Eric D. et al.
Object Type:
Article
System:
The UNT Digital Library
Study of Security Attributes of Smart Grid Systems- Current Cyber Security Issues
This document provides information for a report to congress on Smart Grid security as required by Section 1309 of Title XIII of the Energy Independence and Security Act of 2007. The security of any future Smart Grid is dependent on successfully addressing the cyber security issues associated with the nation’s current power grid. Smart Grid will utilize numerous legacy systems and technologies that are currently installed. Therefore, known vulnerabilities in these legacy systems must be remediated and associated risks mitigated in order to increase the security and success of the Smart Grid. The implementation of Smart Grid will include the deployment of many new technologies and multiple communication infrastructures. This report describes the main technologies that support Smart Grid and summarizes the status of implementation into the existing U.S. electrical infrastructure.
Date:
April 1, 2009
Creator:
Boyer, Wayne F. & McBride, Scott A.
Object Type:
Report
System:
The UNT Digital Library
Modeling Mechanical Behavior of a Prismatic Replaceable Reflector Block
This report outlines the development of finite element models used to determine temperature and stresses in a prismatic core reflector block. This initial analysis determines an appropriate temperature distribution in a prismatic reflector from limiting conditions in the adjacent fuel block based on simplifying assumptions.
Date:
April 1, 2009
Creator:
Bratton, Robert
Object Type:
Report
System:
The UNT Digital Library
Novel Dual-Functional Membrane for Controlling Carbon Dioxide Emissions from Fossil Fuel Power Plants
CO{sub 2} captured from coal-fired power plants represents three-quarters of the total cost of an entire carbon sequestration process. Conventional amine absorption or cryogenic separation requires high capital investment and is very energy intensive. Our novel membrane process is energy efficient with great potential for economical CO{sub 2} capture. Three classes of microporous sol-gel derived silica-based membranes were developed for selective CO{sub 2} removal under simulated flue gas conditions (SFG), e.g. feed of 10% vol. CO{sub 22} in N{sub 2}, 1 atm total pressure, T = 50-60 C, RH>50%, SO2>10 ppm. A novel class of amine-functional microporous silica membranes was prepared using an amine-derivatized alkoxysilane precursor, exhibiting enhanced (>70) CO{sub 2}:N{sub 2} selectivity in the presence of H{sub 2}O vapor, but its CO{sub 2} permeance was lagging (<1 MPU). Pure siliceous membranes showed higher CO{sub 2} permeance (1.5-2 MPU) but subsequent densification occurred under prolonged SFG conditions. We incorporated NiO in the microporous network up to a loading of Ni:Si = 0.2 to retard densification and achieved CO2 permeance of 0.5 MPU and CO{sub 2}:N{sub 2} selectivity of 50 after 163 h exposure to SFG conditions. However, CO{sub 2} permeance should reach greater than 2.0 MPU in order to achieve …
Date:
April 30, 2009
Creator:
Brinker, C. Jeffrey; Xomeritakis, George k.; Tsai, C.-Y. Andy & Jiang, Ying-Bing
Object Type:
Report
System:
The UNT Digital Library
OVERVIEW OF BERYLLIUM SAMPLING AND ANALYSIS
Because of its unique properties as a lightweight metal with high tensile strength, beryllium is widely used in applications including cell phones, golf clubs, aerospace, and nuclear weapons. Beryllium is also encountered in industries such as aluminium manufacturing, and in environmental remediation projects. Workplace exposure to beryllium particulates is a growing concern, as exposure to minute quantities of anthropogenic forms of beryllium may lead to sensitization and to chronic beryllium disease, which can be fatal and for which no cure is currently known. Furthermore, there is no known exposure-response relationship with which to establish a 'safe' maximum level of beryllium exposure. As a result, the current trend is toward ever lower occupational exposure limits, which in turn make exposure assessment, both in terms of sampling and analysis, more challenging. The problems are exacerbated by difficulties in sample preparation for refractory forms of beryllium, such as beryllium oxide, and by indications that some beryllium forms may be more toxic than others. This chapter provides an overview of sources and uses of beryllium, health risks, and occupational exposure limits. It also provides a general overview of sampling, analysis, and data evaluation issues that will be explored in greater depth in the remaining …
Date:
April 1, 2009
Creator:
Brisson, M
Object Type:
Book
System:
The UNT Digital Library