Partner
UNT Libraries Government Documents Department
382
Oklahoma Historical Society
51
UNT Libraries Special Collections
50
UNT Libraries
38
UNT Music Library
13
Sterling Municipal Library
12
Carl Albert Congressional Research and Studies Center
7
National Museum of the Pacific War/Admiral Nimitz Foundation
6
San Antonio Public Library
5
Comanche Public Library
4
51 More
Collection
Office of Scientific & Technical Information Technical Reports
176
Texas Digital Newspaper Program
145
Congressional Research Service Reports
119
Oklahoma Digital Newspaper Program
60
Tocker Foundation Grant
54
Defense Base Closure and Realignment Commission
42
Government Accountability Office Reports
38
The Greensheet
32
College of Music Recordings
13
José L. Castillo Photograph Collection
13
91 More
Degree Department
Degree Discipline
Degree Level
Country
States
Year
Month
Day
Language
2005 BRAC Commission Final COBRA Run - COBRA Air Force 51 Realign Fairchild AFB Spokane WA
2005 BRAC Commission Final COBRA Run - COBRA Air Force 51 Realign Fairchild AFB Spokane WA - 116Z - Fairchild
Date:
March 27, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
2005 BRAC Commission Final COBRA Run - Broadway DON-0173v3
2005 BRAC Commission Final COBRA Run - Broadway DON-0173v3 - 192 - Close Broadway Complex San Diego, CA
Date:
March 27, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
2005 BRAC Commission Final COBRA Run - MJB OCE-Cecil BOS Update 05.08.07 1441
2005 BRAC Commission Final COBRA Run - MJB OCE-Cecil BOS Update 05.08.07 1441 - 193B - Close MJB Oceana, VA
Date:
March 27, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
2005 BRAC Commission Final COBRA Run - Galena cash flow
2005 BRAC Commission Final COBRA Run - Galena cash flow - 195 - Galena AFB, AK
Date:
March 27, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
2005 BRAC Commission Final COBRA Run - HSA0115 Excursion Joint Med Group to NNMC Bethesda
2005 BRAC Commission Final COBRA Run - HSA0115 Excursion Joint Med Group to NNMC Bethesda - 198 - Realign Joint Medical Command
Date:
March 27, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
2005 BRAC Commission Final COBRA Run - COBRA Air Force 6 Realign Eielson
2005 BRAC Commission Final COBRA Run - COBRA Air Force 6 Realign Eielson - 79Z - Eielson
Date:
March 27, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
2005 BRAC Commission Final COBRA Run - COBRA USAF 0102V2 (904c1)
2005 BRAC Commission Final COBRA Run - COBRA USAF 0102V2 (904c1) - 118 - Air Force Logistics Support Centers
Date:
March 27, 2006
Creator:
United States. Defense Base Closure and Realignment Commission.
Object Type:
Text
System:
The UNT Digital Library
Faculty Recital: 2006-02-27 - Brass Ensemble
Access:
Use of this item is restricted to the UNT Community
Faculty brass ensemble recital performed at the UNT College of Music Recital Hall
Date:
February 27, 2006
Creator:
Holt, John, 1959-; Johnson, Keith M., 1941-; Sharnberg, William; Baker, Tony (Trombonist); Bowman, Brian, 1946- & Little, Donald C.
Object Type:
Sound
System:
The UNT Digital Library
Renewal, Modulation, and Superstatistics in Times Series
Article discussing two different approaches, referred to as renewal and modulation, to generate time series with a nonexponential distribution of waiting times.
Date:
April 27, 2006
Creator:
Allegrini, Paolo; Barbi, Francesco; Grigolini, Paolo & Paradisi, Paolo
Object Type:
Article
System:
The UNT Digital Library
QUESTIONNAIRE ON THE CAPABILITIES OF MEMBER STATES REGARDING THE ANALYSIS OF BIOMEDICAL SAMPLES
None
Date:
March 27, 2006
Creator:
Alcaraz, A. & Gregg, H.
Object Type:
Report
System:
The UNT Digital Library
Seismic imaging of reservoir flow properties: Resolving waterinflux and reservoir permeability
Methods for geophysical model assessment, in particuale thecomputation of model parameter resolution, indicate the value and thelimitations of time-lapse data in estimating reservoir flow properties. Atrajectory-based method for computing sensitivities provides an effectivemeans to compute model parameter resolutions. We examine the commonsituation in which water encroaches into a resrvoir from below, as due tothe upward movement of an oil-water contact. Using straight-forwardtechniques we find that, by inclusing reflections off the top and bottomof a reservoir tens of meters thick, we can infer reservoir permeabilitybased upon time-lapse data. We find that, for the caseof water influxfrom below, using multiple time-lapse 'snapshots' does not necessarilyimprove the resolution of reservoir permeability. An application totime-lapse data from the Norne field illustrates that we can resolve thepermeability near a producing well using reflections from threeinterfaces associated with the reservoir.
Date:
November 27, 2006
Creator:
Vasco, D.W. & Keers, Henk
Object Type:
Article
System:
The UNT Digital Library
Do grain boundaries in nanophase metals slide?
Nanophase metallic materials show a maximum in strength as grain size decreases to the nano scale, indicating a break down of the Hall-Petch relation. Grain boundary sliding, as a possible accommodation mechanisms, is often the picture that explain computer simulations results and real experiments. In a recent paper, Bringa et al. Science 309, 1838 (2005), we report on the observation of an ultra-hard behavior in nanophase Cu under shock loading, explained in terms of a reduction of grain boundary sliding under the influence of the shock pressure. In this work we perform a detailed study of the effects of hydrostatic pressure on nanophase Cu plasticity and find that it can be understood in terms of pressure dependent grain boundary sliding controlled by a Mohr-Coulomb law.
Date:
October 27, 2006
Creator:
Bringa, E M; Leveugle, E & Caro, A
Object Type:
Article
System:
The UNT Digital Library
The Heavy-Ion Approximation for Ambipolar Diffusion Calcuations for Weakly Ionized Plasmas
Ambipolar diffusion redistributes magnetic flux in weakly ionized plasmas and plays a critical role in star formation. Simulations of ambipolar diffusion using explicit MHD codes are prohibitively expensive for the level of ionization observed in molecular clouds ({approx}< 10{sup -6}) since an enormous number of time steps is required to represent the dynamics of the dominant neutral component with a time step determined by the trace ion component. Here we show that ambipolar diffusion calculations can be significantly accelerated by the 'heavy-ion approximation', in which the mass density of the ions is increased and the collisional coupling constant with the neutrals decreased such that the product remains constant. In this approximation, the ambipolar diffusion time and the ambipolar magnetic Reynolds number remain unchanged. We present three tests of the heavy-ion approximation: C-type shocks, the Wardle instability, and the 1D collapse of a magnetized slab. We show that this approximation is quite accurate provided that (1) the square of the Alfven Mach number is small compared to the ambipolar diffusion Reynolds number for dynamical problems, and that (2) the ion mass density is negligible for quasi-static problems; a specific criterion is given for the magnetized slab problem. The first condition can …
Date:
July 27, 2006
Creator:
Li, P; McKee, C & Klein, R
Object Type:
Article
System:
The UNT Digital Library
FY05 LDRD Final Report Spectroscopy of Shocked Deuterium
We summarize the observations of unusual optical properties of shocked liquid deuterium (D{sub 2}) that led to proposing spectroscopic measurements. The apparatus built for the measurements is briefly described, along with some representative results in a test material. Unfortunately, spectroscopic measurements were not performed in shocked D{sub 2} during the course of the project. Some reasons are noted.
Date:
March 27, 2006
Creator:
Holmes, N. C.
Object Type:
Report
System:
The UNT Digital Library
Reversible expansion of gallium-stabilized (delta)-plutonium
It is shown that the transient expansion of plutonium-gallium alloys observed both in the lattice parameter as well as in the dimension of a sample held at ambient temperature can be explained by assuming incipient precipitation of Pu{sub 3}Ga. However, this ordered {zeta}-phase is also subject to radiation-induced disordering. As a result, the gallium-stabilized {delta}-phase, being metastable at ambient temperature, is driven towards thermodynamic equilibrium by radiation-enhanced diffusion of gallium and at the same time reverted back to its metastable state by radiation-induced disordering. A steady state is reached in which only a modest fraction of the gallium present is arranged in ordered {zeta}-phase regions.
Date:
February 27, 2006
Creator:
Wolfer, W G; Oudot, B & Baclet, N
Object Type:
Article
System:
The UNT Digital Library
Analysis of Order Formation in Block Copolymer Thin Films UsingResonant Soft X-Ray Scattering
The lateral order of poly(styrene-block-isoprene) copolymer(PS-b-PI) thin films is characterized by the emerging technique ofresonant soft X-ray scattering (RSOXS) at the carbon K edge and comparedto ordering in bulk samples of the same materials measured usingconventional small-angle X-ray scattering. We show resonance using theoryand experiment that the loss of scattering intensity expected with adecrease in sample volume in the case of thin films can be overcome bytuning X-rays to the pi* resonance of PS or PI. Using RSOXS, we study themicrophase ordering of cylinder- and phere-forming PS-b-PI thin films andcompare these results to position space data obtained by atomic forcemicroscopy. Our ability to examine large sample areas (~;9000 mu m2) byRSOXS enables unambiguous identification of the lateral lattice structurein the thin films. In the case of the sphere-forming copolymer thin film,where the spheres are hexagonally arranged, the average sphere-to-spherespacing is between the bulk (body-centered cubic) nearest neighbor andbulk unit cell spacings. In the case of the cylinder-forming copolymerthin film, the cylinder-to-cylinder spacing is within experimental errorof that obtained in the bulk.
Date:
November 27, 2006
Creator:
Virgili, Justin M.; Tao, Yuefei; Kortright, Jeffrey B.; Balsara,Nitash P. & Segalman, Rachel A.
Object Type:
Article
System:
The UNT Digital Library
Nuclear Resonance Fluorescence Excitations Near 2 MeV in 235U and 239Pu
A search for nuclear resonance fluorescence excitations in {sup 235}U and {sup 239}Pu within the energy range of 1.0- to 2.5-MeV was performed using a 4-MeV continuous bremsstrahlung source at the High Voltage Research Laboratory at the Massachusetts Institute of Technology. Measurements utilizing high purity Ge detectors at backward angles identified 9 photopeaks in {sup 235}U and 12 photopeaks in {sup 239}Pu in this energy range. These resonances provide unique signatures that allow the materials to be non-intrusively detected in a variety of environments including fuel cells, waste drums, vehicles and containers. The presence and properties of these states may prove useful in understanding the mechanisms for mixing low-lying collective dipole excitations with other states at low excitations in heavy nuclei.
Date:
December 27, 2006
Creator:
Bertozzi, W.; Caggiano, J. A.; Hensley, W. K.; Johnson, M. S.; Korbly, S. E.; Ledoux, R. J. et al.
Object Type:
Article
System:
The UNT Digital Library
An Efficient Vector Finite Element Method for Nonlinear Electromagnetic Modeling
We have developed a mixed Vector Finite Element Method (VFEM) for Maxwell's equations with a nonlinear polarization term. The method allows for discretization of complicated geometries with arbitrary order representations of the B and E fields. In this paper we will describe the method and a series of optimizations that significantly reduce the computational cost. Additionally, a series of test simulations will be presented to validate the method. Finally, a nonlinear waveguide mode mixing example is presented and discussed.
Date:
June 27, 2006
Creator:
Fisher, A. C.; White, D. A. & Rodrigue, G. H.
Object Type:
Article
System:
The UNT Digital Library
A Brief Analysis of Geologic CO2 Storage Potential in South Korea
Paper summarizes the literature about geologic CO2 storage potential in South Korea.
Date:
June 27, 2006
Creator:
Dooley, James J.
Object Type:
Report
System:
The UNT Digital Library
Space Nuclear Power Plant Pre-Conceptual Design Report, For Information
This letter transmits, for information, the Project Prometheus Space Nuclear Power Plant (SNPP) Pre-Conceptual Design Report completed by the Naval Reactors Prime Contractor Team (NRPCT). This report documents the work pertaining to the Reactor Module, which includes integration of the space nuclear reactor with the reactor radiation shield, energy conversion, and instrumentation and control segments. This document also describes integration of the Reactor Module with the Heat Rejection segment, the Power Conditioning and Distribution subsystem (which comprise the SNPP), and the remainder of the Prometheus spaceship.
Date:
January 27, 2006
Creator:
Levine, B.
Object Type:
Report
System:
The UNT Digital Library
The Two-loop Anomalous Dimension Matrix for Soft Gluon Exchange
The resummation of soft gluon exchange for QCD hard scattering requires a matrix of anomalous dimensions. We compute this matrix directly for arbitrary 2 {yields} n massless processes for the first time at two loops. Using color generator notation, we show that it is proportional to the one-loop matrix. This result reproduces all pole terms in dimensional regularization of the explicit calculations of massless 2 {yields} 2 amplitudes in the literature, and it predicts all poles at next-to-leading order in any 2 {yields} n process that has been computed at next-to-leading order. The proportionality of the one- and two-loop matrices makes possible the resummation in closed form of the next-to-next-to-leading logarithms and poles in dimensional regularization for the 2 {yields} n processes.
Date:
June 27, 2006
Creator:
Aybat, S.Mert; Dixon, Lance J. & Sterman, George
Object Type:
Report
System:
The UNT Digital Library
A Cone Jet-Finding Algorithm for Heavy-Ion Collisions at LHCEnergies
Standard jet finding techniques used in elementary particle collisions have not been successful in the high track density of heavy-ion collisions. This paper describes a modified cone-type jet finding algorithm developed for the complex environment of heavy-ion collisions. The primary modification to the algorithm is the evaluation and subtraction of the large background energy, arising from uncorrelated soft hadrons, in each collision. A detailed analysis of the background energy and its event-by-event fluctuations has been performed on simulated data, and a method developed to estimate the background energy inside the jet cone from the measured energy outside the cone on an event-by-event basis. The algorithm has been tested using Monte-Carlo simulations of Pb+Pb collisions at {radical}s = 5.5 TeV for the ALICE detector at the LHC. The algorithm can reconstruct jets with a transverse energy of 50 GeV and above with an energy resolution of {approx} 30%.
Date:
July 27, 2006
Creator:
Blyth, S.-L.; Horner, M.J.; Awes, T.C.; Cormier, T.; Gray, H.M.; Klay, J.L. et al.
Object Type:
Article
System:
The UNT Digital Library
Observation of e+e- Annihilations into the C=+1 Hadronic Final States \rho^0\rho^0 and \phi\rho^0
The authors report the first observation of e{sup +}e{sup -} annihilations into states of positive C-parity, namely {rho}{sup 0}{rho}{sup 0} and {phi}{rho}{sup 0}. The two states are observed in the {pi}{sup +}{pi}{sup -}{pi}{sup +}{pi}{sup -} and K{sup +}K{sup -} {pi}{sup +}{pi}{sup -} final states, respectively, in a data sample of 225 fb{sup -1} collected by the BABAR experiment at the PEP-II e{sup +}e{sup -} storage rings at energies near {radical}s = 10.58 GeV. The distributions of cos {theta}*, where {theta}* is the center-of-mass polar angle of the {phi} meson or the forward {rho}{sup 0} meson, suggest production by two-virtual-photon annihilation. They measure cross sections within the range |cos {theta}*| < 0.8 of {sigma}(e{sup +}e{sup -} {yields} {rho}{sup 0} {rho}{sup 0}) = 20.7 {+-} 0.7(stat) {+-} 2.7(syst) fb and {sigma}(e{sup +}e{sup -} {yields} {phi}{rho}{sup 0}) = 5.7 {+-} 0.5(stat) {+-} 0.8(syst) fb.
Date:
June 27, 2006
Creator:
Aubert, B.
Object Type:
Report
System:
The UNT Digital Library
Conducting Polymer-Inorganic Nanoparticle (CPIN) Nanoarrays for Battery Applications - Final Technical Report
Our objective was to develop new, self-assembling conducting polymer-inorganic nanoparticle nanoarrays (CPIN nanoarrays) comprised of nanoparticles of inorganic Li+ insertion compounds that are “wired” together with oligomeric chains of derivatives of polythiophene. Using these nanoarrays, we developed an understanding of the relationship between structure and electrochemical function for nanostructured materials. Such nanoarrays are expected to have extremely high specific energy and specific power for battery applications due to the unique structural characteristics that derive from the nanoarray. Under this award we developed several synthetic approaches to producing manganese dioxide nanoparticles (NPs). We also developed a layer-by-layer approach for immobilizing these NPs so they could be examined electrochemically. We also developed new synthetic procedures for encapsulating manganese dioxide nanoparticles within spheres of polyethylenedioxythiophene (PEDOT), a conducting polymer with excellent charge-discharge stability. These have a unique manganese dioxide core-PEDOT shell structure. We examined the structures of these systems using transmission electron microscopy, various scanning probe microscopies, and electrochemical measurements. Various technical reports have been submitted that describe the work, including conference presentations, publications and patent applications. These reports are available through http://www.osti.gov, the DOE Energy Link System.
Date:
June 27, 2006
Creator:
Buttry, Daniel A.
Object Type:
Report
System:
The UNT Digital Library