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The transfer of neutral molecules, ions and ionic species from water to ethylene glycol and to propylene carbonate; descriptors for pyridinium cations
Article on the transfer of neutral molecules, ions and ionic species from water to ethylene glycol and to propylene carbonate and descriptors for pyridinium cations.
Date:
June 29, 2010
Creator:
Abraham, M. H. (Michael H.) & Acree, William E. (William Eugene)
Object Type:
Article
System:
The UNT Digital Library
The U.S. Oil Refining Industry: Background in Changing Markets and Fuel Policies
This report begins by looking at the current production capacity of the oil refineries operating in the United States, and the sources and changes in crude oil supply. It then examines the changing characteristics of petroleum and petroleum product markets and identifies the effects of these changes on the refining industry. The report concludes with discussion of the policy and regulatory factors that are likely to affect the structure and performance of the industry during the next decade.
Date:
October 29, 2010
Creator:
Andrews, Anthony & Pirog, Robert
Object Type:
Report
System:
The UNT Digital Library
Real time intelligent process control system for thin film solar cell manufacturing
This project addresses the problem of lower solar conversion efficiency and waste in the typical solar cell manufacturing process. The work from the proposed development will lead toward developing a system which should be able to increase solar panel conversion efficiency by an additional 12-15% resulting in lower cost panels, increased solar technology adoption, reduced carbon emissions and reduced dependency on foreign oil. All solar cell manufacturing processes today suffer from manufacturing inefficiencies that currently lead to lower product quality and lower conversion efficiency, increased product cost and greater material and energy consumption. This results in slower solar energy adoption and extends the time solar cells will reach grid parity with traditional energy sources. The thin film solar panel manufacturers struggle on a daily basis with the problem of thin film thickness non-uniformity and other parameters variances over the deposited substrates, which significantly degrade their manufacturing yield and quality. Optical monitoring of the thin films during the process of the film deposition is widely perceived as a necessary step towards resolving the non-uniformity and non-homogeneity problem. In order to enable the development of an optical control system for solar cell manufacturing, a new type of low cost optical sensor is …
Date:
October 29, 2010
Creator:
Atanasoff, George
Object Type:
Report
System:
The UNT Digital Library
FY2011 Budget Proposals and Projections
This report provides an overview of major budget estimates and projections for the FY2011 federal budget cycle. The report presents and compares budget projections calculated by the Obama Administration's Office of Management and Budget (OMB) and the Congressional Budget Office (CBO).
Date:
March 29, 2010
Creator:
Austin, D. A.
Object Type:
Report
System:
The UNT Digital Library
The transverse momentum dependent distribution functions in the bag model
Leading and subleading twist transverse momentum dependent parton distribution functions (TMDs) are studied in a quark model framework provided by the bag model. A complete set of relations among different TMDs is derived, and the question is discussed how model-(in)dependent such relations are. A connection of the pretzelosity distribution and quark orbital angular momentum is derived. Numerical results are presented, and applications for phenomenology discussed. In particular, it is shown that in the valence-x region the bag model supports a Gaussian Ansatz for the transverse momentum dependence of TMDs.
Date:
January 29, 2010
Creator:
Avakian, Harut; Efremov, Anatoly; Schweitzer, Peter & Yuan, Feng
Object Type:
Article
System:
The UNT Digital Library
Systematic reduction of sign errors in many-body calculations of atoms and molecules
None
Date:
March 29, 2010
Creator:
Bajdich, M.; Tiago, M. L.; Hood, R. Q.; Kent, P. R. & Reboredo, F. A.
Object Type:
Article
System:
The UNT Digital Library
On the Performance of an Algebraic MultigridSolver on Multicore Clusters
Algebraic multigrid (AMG) solvers have proven to be extremely efficient on distributed-memory architectures. However, when executed on modern multicore cluster architectures, we face new challenges that can significantly harm AMG's performance. We discuss our experiences on such an architecture and present a set of techniques that help users to overcome the associated problems, including thread and process pinning and correct memory associations. We have implemented most of the techniques in a MultiCore SUPport library (MCSup), which helps to map OpenMP applications to multicore machines. We present results using both an MPI-only and a hybrid MPI/OpenMP model.
Date:
April 29, 2010
Creator:
Baker, A H; Schulz, M & Yang, U M
Object Type:
Article
System:
The UNT Digital Library
Trade Law: An Introduction to Selected International Agreements and U.S. Laws
This report is an introductory overview of the legal framework governing trade-related measures. The agreements and laws selected for discussion are those most commonly implicated by U.S. trade interests, but there are U.S. trade obligations beyond those reviewed in this report.
Date:
June 29, 2010
Creator:
Barbour, Emily C.
Object Type:
Report
System:
The UNT Digital Library
Metal-Organic Frameworks: Literature Survey and Recommendation of Potential Sorbent Materials
Metal-organic frameworks (MOFs) are a special type of porous material with a number of unique properties, including exceptionally high surface areas, large internal pore volumes (void space) and tunable pore sizes. These materials are prepared through the assembly of molecular building blocks into ordered three-dimensional structures. The bulk properties of the MOF are determined by the nature of the building blocks and, as such, these materials can be designed with special characteristics that cannot be realized in other sorbent materials, like activated carbons. For example, MOFs can be constructed with binding sites or pockets that can exhibit selectivity for specific analytes. Alternatively, the framework can be engineered to undergo reversible dimensional changes (or 'breathing') upon interaction with an analyte, effectively trapping the molecule of interest in the lattice structure. In this report, we have surveyed the 4000 different MOF structures reported in the open literature and provided recommendations for specific MOF materials that should be investigated as sorbents for this project.
Date:
April 29, 2010
Creator:
Baumann, T F
Object Type:
Report
System:
The UNT Digital Library
Urban Search and Rescue Task Forces: Facts and Issues
This report provides an overview of the Urban Search and Rescue (USAR) task forces that has been designated by the Department of Homeland Security (DHS) to provide specialized assistance after buildings or other structures collapse.
Date:
January 29, 2010
Creator:
Bea, Keith
Object Type:
Report
System:
The UNT Digital Library
Background and Derivation of ANS-5.4 Standard Fission Product Release Model
This background report describes the technical basis for the newly proposed American Nuclear Society (ANS) 5.4 standard, Methods for Calculating the Fractional Release of Volatile Fission Products from Oxide Fuels. The proposed ANS 5.4 standard provides a methodology for determining the radioactive fission product releases from the fuel for use in assessing radiological consequences of postulated accidents that do not involve abrupt power transients. When coupled with isotopic yields, this method establishes the 'gap activity,' which is the inventory of volatile fission products that are released from the fuel rod if the cladding are breached.
Date:
January 29, 2010
Creator:
Beyer, Carl E. & Turnbull, Andrew J.
Object Type:
Report
System:
The UNT Digital Library
Objectives and Layout of a High-Resolution X-ray Imaging Crystal Spectrometer for the Large Helical Device (LHD)
A high-resolution X-ray imaging crystal spectrometer, whose concept was tested on NSTX and Alcator C-Mod, is being designed for LHD. This instrument will record spatially resolved spectra of helium-like Ar16+ and provide ion temperature profiles with spatial and temporal resolutions of < 2 cm and ≥ 10 ms. The stellarator equilibrium reconstruction codes, STELLOPT and PIES, will be used for the tomographic inversion of the spectral data. The spectrometer layout and instrumental features are largely determined by the magnetic field structure of LHD.
Date:
July 29, 2010
Creator:
Bitter, M.; Gates, D.; Monticello, D.; Neilson, H.; Reiman, A.; Roquemore, A. L. et al.
Object Type:
Report
System:
The UNT Digital Library
Science and Technology Review December 2010
This month's issue has the following articles: (1) More Insight to Better Understand Climate Change - Commentary by Tomas Diaz de la Rubia; (2) Strengthening Our Understanding of Climate Change - Researchers at the Center for Accelerator Mass Spectrometry are working to better understand climate variation and sharpen the accuracy of predictive models; (3) Precision Diagnostics Tell All - The National Ignition Facility relies on sophisticated diagnostic instruments for measuring the key physical processes that occur in high-energy-density experiments; (4) Quick Detection of Pathogens by the Thousands - Livermore scientists have developed a device that can simultaneously identify thousands of viruses and bacteria within 24 hours; and (5) Carbon Dioxide into the Briny Deep - A proposed technique for burying carbon dioxide underground could help mitigate the effects of this greenhouse gas while producing freshwater.
Date:
October 29, 2010
Creator:
Blobaum, K M
Object Type:
Report
System:
The UNT Digital Library
Science and Technology Review September 2010
None
Date:
July 29, 2010
Creator:
Blobaum, K. J.
Object Type:
Report
System:
The UNT Digital Library
Oral History Interview with Walter E. Bolssen, July 29, 2010
Transcript of an oral interview with Walter E. Bolssen. Born in 1918, he enlisted in the Navy in December, 1939. After training as an airplane engine mechanic, he was sent to Kaneohe Bay, Hawaii in late 1940. He served as a PBY crew plane captain in VP-12. He describes his experiences during and after the attack on Pearl Harbor. In 1943 he was stationed at Henderson Field on Guadalcanal where he flew on night patrols in a “Black Cat” PBY-5. After approximately one year on Guadalcanal, he was sent to New Orleans, Louisiana, where he trained mechanics for the “Yellow Peril” N3N airplane. After the war ended, he was discharged from the Navy, but re-enlisted three months later. He retired in 1960.
Date:
July 29, 2010
Creator:
Bolssen, Walter E.
Object Type:
Sound
System:
The Portal to Texas History
Oral History Interview with Walter E. Bolssen, July 29, 2010
Transcript of an oral interview with Walter E. Bolssen. Born in 1918, he enlisted in the Navy in December, 1939. After training as an airplane engine mechanic, he was sent to Kaneohe Bay, Hawaii in late 1940. He served as a PBY crew plane captain in VP-12. He describes his experiences during and after the attack on Pearl Harbor. In 1943 he was stationed at Henderson Field on Guadalcanal where he flew on night patrols in a “Black Cat” PBY-5. After approximately one year on Guadalcanal, he was sent to New Orleans, Louisiana, where he trained mechanics for the “Yellow Peril” N3N airplane. After the war ended, he was discharged from the Navy, but re-enlisted three months later. He retired in 1960.
Date:
July 29, 2010
Creator:
Bolssen, Walter E.
Object Type:
Text
System:
The Portal to Texas History
Fabrication and Test of 90-mm Nb3Sn Quadrupole Model Based on Dipole-type Collar
A series of 90-mm TQC quadrupole models with a collar-based mechanical structure has been fabricated and tested within the framework of the US-LHC Accelerator Research Program (LARP) using quadrupole-symmetric stainless steel collar laminations. This paper describes the design features, construction and test of TQC02Eb, the first TQC made with dipole-type collar and collaring techniques. Magnet test includes quench performance and field quality measurements at 4.5 and 1.9 K. Results of model performance for TQC quadrupoles based on dipole-type and quadrupole-type collars are compared and discussed.
Date:
July 29, 2010
Creator:
Bossert, R.; Andreev, N.; Chlachidze, G.; Kashikhin, V. S.; Kashikhin, V. V.; Lamm, M. J. et al.
Object Type:
Article
System:
The UNT Digital Library
Probing the pairing symmetry of the iron pnictides with electronic Raman scattering
An important issue in the study of the iron-arsenic based superconductors is the symmetry of the superconducting gap, a problem complicated by multiple gaps on different Fermi surface sheets. Electronic Raman scattering is a flexible bulk probe which allows one in principle to determine gap magnitudes and test for gap nodes in different regions of the Brillouin zone by employing different photon polarization states. Here we calculate the clean Raman intensity for A{sub 1g}, B{sub 1g} and B{sub 2g} polarizations, and discuss the peak structures and low-energy power laws which might be expected for several popular models of the superconducting gap in these systems.
Date:
April 29, 2010
Creator:
Boyd, G.R.
Object Type:
Article
System:
The UNT Digital Library
Doctoral Recital: 2010-11-29 - Lindsay Braun, clarinet
Recital presented at the UNT College of Music Voertman Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
November 29, 2010
Creator:
Braun, Lindsay
Object Type:
Sound
System:
The UNT Digital Library
APPLICATIONS OF BIOTECHNOLOGY IN DEVELOPMENT OF BIOMATERIALS: NANOTECHNOLOGY AND BIOFILMS
Biotechnology is the application of biological techniques to develop new tools and products for medicine and industry. Due to various properties including chemical stability, biocompatibility, and specific activity, e.g. antimicrobial properties, many new and novel materials are being investigated for use in biosensing, drug delivery, hemodialysis, and other medical applications. Many of these materials are less than 100 nanometers in size. Nanotechnology is the engineering discipline encompassing designing, producing, testing, and using structures and devices less than 100 nanometers. One of the challenges associated with biomaterials is microbial contamination that can lead to infections. In recent work we have examined the functionalization of nanoporous biomaterials and antimicrobial activities of nanocrystalline diamond materials. In vitro testing has revealed little antimicrobial activity against Pseudomonas fluorescens bacteria and associated biofilm formation that enhances recalcitrance to antimicrobial agents including disinfectants and antibiotics. Laser scanning confocal microscopy studies further demonstrated properties and characteristics of the material with regard to biofilm formation.
Date:
November 29, 2010
Creator:
Brigmon, R.; Berry, T. & Narayan, R.
Object Type:
Article
System:
The UNT Digital Library
AdS/QCD, LIight-Front Holography, and the Non-perturbative Running Coupling
The combination of Anti-de Sitter space (AdS) methods with light-front (LF) holography provides a remarkably accurate first approximation for the spectra and wavefunctions of meson and baryon light-quark bound states. The resulting bound-state Hamiltonian equation of motion in QCD leads to relativistic light-front wave equations in terms of an invariant impact variable {zeta} which measures the separation of the quark and gluonic constituents within the hadron at equal light-front time. These equations of motion in physical space-time are equivalent to the equations of motion which describe the propagation of spin-J modes in anti-de Sitter (AdS) space. The eigenvalues give the hadronic spectrum, and the eigenmodes represent the probability distributions of the hadronic constituents at a given scale. A positive-sign confining dilaton background modifying AdS space gives a very good account of meson and baryon spectroscopy and form factors. The light-front holographic mapping of this model also leads to a non-perturbative effective coupling {alpha}{sub s}{sup Ads} (Q{sup 2}) which agrees with the effective charge defined by the Bjorken sum rule and lattice simulations. It displays a transition from perturbative to nonperturbative conformal regimes at a momentum scale {approx} 1 GeV. The resulting {beta}-function appears to capture the essential characteristics of the …
Date:
April 29, 2010
Creator:
Brodsky, Stanley J.; de Teramond, Guy & Deur, Alexandre
Object Type:
Article
System:
The UNT Digital Library
The Law of Church and State: Public Aid to Sectarian Schools
This report gives a brief overview of the evolution of the Court's interpretation of the Establishment Clause in this area and analyzes the categories of aid that have been addressed by the Court. The report explains which categories have been held to be constitutionally permissible or impermissible, both at the elementary and secondary school level and at the postsecondary level. The report also briefly addresses a set of cases (Arizona Christian School Tuition Organization v. Winn; Garriott v. Winn) currently before the Court regarding the constitutionality of an Arizona statute that permits individuals to claim a tax credit for certain donations to school tuition organizations that use the funds for scholarships to private and, in some instances, religious schools.
Date:
November 29, 2010
Creator:
Brougher, Cynthia
Object Type:
Report
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 118, No. 20, Ed. 1 Friday, January 29, 2010
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 29, 2010
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Perry Daily Journal (Perry, Okla.), Vol. 118, No. 83, Ed. 1 Thursday, April 29, 2010
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 29, 2010
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History