Partner
UNT Libraries Government Documents Department
1,118
UNT Libraries Special Collections
334
Oklahoma Historical Society
124
UNT Libraries
104
UNT Music Library
45
National Museum of the Pacific War/Admiral Nimitz Foundation
36
Sterling Municipal Library
31
Carl Albert Congressional Research and Studies Center
17
San Antonio Public Library
13
UNT Honors College
13
64 More
Collection
Office of Scientific & Technical Information Technical Reports
565
Texas Digital Newspaper Program
359
Congressional Research Service Reports
278
Oklahoma Digital Newspaper Program
146
Tocker Foundation Grant
132
Government Accountability Office Reports
120
Texas Laws and Resolutions Archive
102
Randy Mallory Papers
96
The Greensheet
79
The Black Academy of Arts and Letters Records
73
114 More
Degree Department
Degree Discipline
Degree Level
Country
Decade
Year
Month
2,083 Matching Results
Results open in a new window/tab.
Results:
1 - 24 of
2,083
next
Abilene Philharmonic Playbill: March 3-April 21, 2007
Program for an Abilene Philharmonic concert that ran from March 3rd to April 21st (Pop II and Classical IV) during the 57th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
March 2007
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Measurement of sigma(chi(c2)B(chi(c2) ---> J / psi gamma) / sigma(chi(c1)B(chi(c1) ---> J / psi gamma) in p anti-p collisions at s**(1/2) = 1.96-TeV
The authors measure the ratio of cross section times branching fraction, {sigma}{sub {chi}c2}{beta}({chi}{sub c2} {yields} J/{psi}{gamma})/{sigma}{sub {chi}c1}{beta}({chi}{sub c1} {yields} J/{psi}{gamma}), in 1.1 fb{sup -1} of p{bar p} collisions at {radical}s = 1.96 TeV. This measurement covers the kinematic range p{sub T} (J/{psi}) > 4.0 GeV/c, |{eta}(J/{psi})| < 1.0, and p{sub T}({gamma}) > 1.0 GeV/c. For events due to prompt processes, they find R{sub p} = 0.395 {+-} 0.016(stat.) {+-} 0.015(sys.). This result represents a significant improvement in precision over previous measurements of prompt {chi}{sub c1,2} hadroproduction.
Date:
March 1, 2007
Creator:
Abulencia, A.; Adelman, J.; Affolder, T.; Akimoto, T.; Albrow, M. G.; Ambrose, D. et al.
Object Type:
Article
System:
The UNT Digital Library
Precise measurement of the top quark mass in the lepton+jets topology at CDF II
The authors present a measurement of the mass of the top quark from proton-antiproton collisions recorded at the CDF experiment in Run II of the Fermilab Tevatron. They analyze events from the single lepton plus jets final state (t{bar t} {yields} W{sup +}bW{sup -}{bar b} {yields} lvbq{bar q}{bar b}). The top quark mass is extracted using a direct calculation of the probability density that each event corresponds to the t{bar t} final state. The probability is a function of both the mass of the top quark and the energy scale of the calorimeter jets, which is constrained in situ by the hadronic W boson mass. Using 167 events observed in 955 pb{sup -1} of integrated luminosity, they achieve the single most precise measurement of the top quark mass, 170.8 {+-} 2.2(stat.) {+-} 1.4(syst.) GeV/c{sup 2}.
Date:
March 1, 2007
Creator:
Abulencia, A.; Adelman, J.; Affolder, T.; Akimoto, T.; Albrow, M. G.; Amerio, S. et al.
Object Type:
Article
System:
The UNT Digital Library
On the occasion of the inauguration of Balenciaga and His Legacy: Haute Couture from the Texas Fashion Collection
Article and gallery of photographs from the gala premiere for the "Balenciaga and His Legacy: Haute Couture from the Texas Fashion Collection" exhibit held at the Meadows Museum in Dallas.
Date:
March 24, 2007
Creator:
Adams, Sharon
Object Type:
Article
System:
The UNT Digital Library
Radiological Survey Results for Areas A1 North, A5A, A6, and B2 at the Molycorp Washington Remediation Project, Washington, Pennsylvania
Perform radiological surveys of the Molycorp Washington Remediation Project (MWRP) facility in Washington, Pennsylvania
Date:
March 13, 2007
Creator:
Adams, W. C.
Object Type:
Report
System:
The UNT Digital Library
Comments on Worldsheet Theories Dual to Free Large N Gauge Theories
We continue to investigate properties of the worldsheet conformal field theories (CFTs) which are conjectured to be dual to free large N gauge theories, using the mapping of Feynman diagrams to the worldsheet suggested in [1]. The modular invariance of these CFTs is shown to be built into the formalism. We show that correlation functions in these CFTs which are localized on subspaces of the moduli space may be interpreted as delta-function distributions, and that this can be consistent with a local worldsheet description given some constraints on the operator product expansion coefficients. We illustrate these features by a detailed analysis of a specific four-point function diagram. To reliably compute this correlator we use a novel perturbation scheme which involves an expansion in the large dimension of some operators.
Date:
March 21, 2007
Creator:
Aharony, Ofer; /Weizmann Inst. /Stanford U., ITP /SLAC; David, Justin R.; Gopakumar, Rajesh; Inst., /Harish-Chandra Res.; Komargodski, Zohar et al.
Object Type:
Report
System:
The UNT Digital Library
The Moduli Space and M(Atrix) Theory of 9d N=1 Backgrounds of M/String Theory
We discuss the moduli space of nine dimensional N = 1 supersymmetric compactifications of M theory/string theory with reduced rank (rank 10 or rank 2), exhibiting how all the different theories (including M theory compactified on a Klein bottle and on a Moebius strip, the Dabholkar-Park background, CHL strings and asymmetric orbifolds of type II strings on a circle) fit together, and what are the weakly coupled descriptions in different regions of the moduli space. We argue that there are two disconnected components in the moduli space of theories with rank 2. We analyze in detail the limits of the M theory compactifications on a Klein bottle and on a Moebius strip which naively give type IIA string theory with an uncharged orientifold 8-plane carrying discrete RR flux. In order to consistently describe these limits we conjecture that this orientifold non-perturbatively splits into a D8-brane and an orientifold plane of charge (-1) which sits at infinite coupling. We construct the M(atrix) theory for M theory on a Klein bottle (and the theories related to it), which is given by a 2 + 1 dimensional gauge theory with a varying gauge coupling compactified on a cylinder with specific boundary conditions. We …
Date:
March 21, 2007
Creator:
Aharony, Ofer; /Weizmann Inst. /Stanford U., ITP /SLAC; Komargodski, Zohar; Patir, Assaf & Inst., /Weizmann
Object Type:
Report
System:
The UNT Digital Library
San Francisco State University IAC 02-06 Final Report
The Industrial Assessment Center (IAC) at San Francisco State University (SFSU) has served the cause of energy efficiency as a whole, and in particular for small and medium-sized manufacturing facilities in northern and central California, within a approximately 150 miles (radial) of San Francisco since 1992. In the current reporting period (September 1, 2002 through November 31, 2006) we have had major accomplishments, which include but are not limited to: - Performing a total of 94 energy efficiency and waste minimization audit days of 87 industrial plants - Recommending and analysis of 809 energy efficiency measures - Training 22 energy engineers, most of whom have joined energy services companies in California. - Disseminating energy efficiency information among local manufacturers - Acting as an information source for energy efficiency for local manufacturers and utilizes - Cooperating with local utilities and California Energy Commission in their energy efficiency projects - Performing various assignments by DOE such as dissemination of information on SEN initiative, conducting workshops on energy efficiency issues, contacting large energy user plants - Establishing a course on “Energy: Resources, Alternatives and Conservation” as a general education course at SFSU - Bringing energy issues to the attention of students in classrooms
Date:
March 5, 2007
Creator:
Ahmad R. Ganji, Ph.D., P.E., IAC DIrector
Object Type:
Report
System:
The UNT Digital Library
Impact of astrophysical processes on the gamma-ray background from dark matter annihilations
We study the impact of astrophysical processes on the gamma-ray background produced by the annihilation of dark matter particles in cosmological halos, with particular attention to the consequences of the formation of supermassive black holes. In scenarios where these objects form adiabatically from the accretion of matter on small seeds, dark matter is first compressed into very dense 'spikes', then its density progressively decreases due to annihilations and scattering of stellar cusps. With respect to previous analyses, based on non-evolving halos, the predicted annihilation signal is higher and significantly distorted at low energies, reflecting the large contribution to the total flux from unevolved spikes at high redshifts. The peculiar spectral feature arising from the specific redshift distribution of the signal, would discriminate the proposed scenario from more conventional astrophysical explanations. We discuss how this affects the prospects for detection and demonstrate that the gamma-ray background from DM annihilations might be detectable even in absence of a signal from the Galactic center.
Date:
March 1, 2007
Creator:
Ahn, Eun-Joo; /Chicago U., Astron. Astrophys. Ctr. /KICP, Chicago /Fermilab /Bartol Research Inst.; Bertone, Gianfranco; Tech., /Rochester Inst.; Merritt, David & /Shanghai, Astron. Observ.
Object Type:
Article
System:
The UNT Digital Library
Dynamic Channel Assignment in IEEE 802.11 Networks
This paper discusses dynamic channel assignment in IEEE 802.11 networks.
Date:
March 2007
Creator:
Akl, Robert G. & Arepally, Anurag
Object Type:
Paper
System:
The UNT Digital Library
Development of a Novel Catalyst for NO Decomposition
Air pollution arising from the emission of nitrogen oxides as a result of combustion taking place in boilers, furnaces and engines, has increasingly been recognized as a problem. New methods to remove NOx emissions significantly and economically must be developed. The current technology for post-combustion removal of NO is the selective catalytic reduction (SCR) of NO by ammonia or possibly by a hydrocarbon such as methane. The catalytic decomposition of NO to give N2 will be preferable to the SCR process because it will eliminate the costs and operating problems associated with the use of an external reducing species. The most promising decomposition catalysts are transition metal (especially copper)-exchanged zeolites, perovskites, and noble metals supported on metal oxides such as alumina, silica, and ceria. The main shortcoming of the noble metal reducible oxide (NMRO) catalysts is that they are prone to deactivation by oxygen. It has been reported that catalysts containing tin oxide show oxygen adsorption behavior that may involve hydroxyl groups attached to the tin oxide. This is different than that observed with other noble metal-metal oxide combinations, which have the oxygen adsorbing on the noble metal and subsequently spilling over to the metal oxide. This observation leads one …
Date:
March 14, 2007
Creator:
Akyurtlu, Ates & Akyurtlu, Jale F.
Object Type:
Report
System:
The UNT Digital Library
Improved Biomass Utilization Through Remote Flow Sensing
The growth of the livestock industry provides a valuable source of affordable, sustainable, and renewable bioenergy, while also requiring the safe disposal of the large quantities of animal wastes (manure) generated at dairy, swine, and poultry farms. If these biomass resources are mishandled and underutilized, major environmental problems will be created, such as surface and ground water contamination, odors, dust, ammonia leaching, and methane emission. Anaerobic digestion of animal wastes, in which microorganisms break down organic materials in the absence of oxygen, is one of the most promising waste treatment technologies. This process produces biogas typically containing {approx}65% methane and {approx}35% carbon dioxide. The production of biogas through anaerobic digestion from animal wastes, landfills, and municipal waste water treatment plants represents a large source of renewable and sustainable bio-fuel. Such bio-fuel can be combusted directly, used in internal combustion engines, converted into methanol, or partially oxidized to produce synthesis gas (a mixture of hydrogen and carbon monoxide) that can be converted to clean liquid fuels and chemicals via Fischer-Tropsch synthesis. Different design and mixing configurations of anaerobic digesters for treating cow manure have been utilized commercially and/or tested on a laboratory scale. These digesters include mechanically mixed, gas recirculation mixed, …
Date:
March 26, 2007
Creator:
Al-Dahhan, Muthanna; Varma, Rajneesh; Karim, Khursheed; Vesvikar, Mehul; Hoffman, Rebecca; Depaoli, David et al.
Object Type:
Report
System:
The UNT Digital Library
Achieve Continuous Injection of Solid Fuels into Advanced Combustion System Pressures
The overall objective of this project is the development of a mechanical rotary-disk feeder, known as the Stamet Posimetric High Pressure Solids Feeder System, to demonstrate feeding of dry granular coal continuously and controllably into pressurized environments of up to 70 kg/cm2 (1,000 psi). This is the Phase III of the ongoing program. Earlier Phases 1 and II successfully demonstrated feeding into pressures up to 35 kg/cm{sup 2} (500 psi). The final report for those phases was submitted in April 2005. Based on the previous work done in Phases I & II using Powder River Basin coal provided by the PSDF facility in Wilsonville, AL, a Phase III feeder system was designed and built to accomplish the target of feeding the coal into a pressure of 70 kg/cm2 (1,000 psi) and to be capable of feed rates of up to 550 kilograms (1,200lbs) per hour. The drive motor system from Phase II was retained for use on Phase III since projected performance calculations indicated it should be capable of driving the Phase III pump to the target levels. The pump & motor system was installed in a custom built test rig comprising an inlet vessel containing an active live-wall hopper …
Date:
March 31, 2007
Creator:
Aldred, Derek L. & Saunders, Timothy
Object Type:
Report
System:
The UNT Digital Library
Enhancing the Quality of Metadata: Modular Approach to Digital Resource Lifecycle Management
This Tech Talk presentation discusses digital resource management. Templates, validation, controlled vocabularies, analysis tools, graphical reports, and more are explained in this presentation.
Date:
March 16, 2007
Creator:
Alemneh, Daniel Gelaw & Phillips, Mark Edward
Object Type:
Presentation
System:
The UNT Digital Library
The Wild and Scenic Rivers Act and Federal Water Rights
This report discusses federal authority over water, and federal "reserved" and non-reserved water rights. Based on the language of the act and its legislative history, it appears that the act creates federal water rights. The act does not specify the quantity of the right. The amount of the federal right is likely to vary from river to river depending on the river's flows, the unappropriated flows in the river at the time of designation, and the values for which the river is being protected.
Date:
March 5, 2007
Creator:
Alexander, Kristina
Object Type:
Report
System:
The UNT Digital Library
Timpson & Tenaha News (Timpson, Tex.), Vol. 23, No. 9, Ed. 1 Thursday, March 1, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 1, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 23, No. 10, Ed. 1 Thursday, March 8, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 8, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 24, No. 11, Ed. 1 Thursday, March 15, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 15, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 24, No. 12, Ed. 1 Thursday, March 22, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 22, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Timpson & Tenaha News (Timpson, Tex.), Vol. 24, No. 13, Ed. 1 Thursday, March 29, 2007
Weekly newspaper from Timpson, Texas that includes local, state, and national news along with advertising.
Date:
March 29, 2007
Creator:
Alexander, Nancy
Object Type:
Newspaper
System:
The Portal to Texas History
Evaluation of ITER MSE Viewing Optics
The Motional Stark Effect (MSE) diagnostic on ITER determines the local plasma current density by measuring the polarization angle of light resulting from the interaction of a high energy neutral heating beam and the tokamak plasma. This light signal has to be transmitted from the edge and core of the plasma to a polarization analyzer located in the port plug. The optical system should either preserve the polarization information, or it should be possible to reliably calibrate any changes induced by the optics. This LLNL Work for Others project for the US ITER Project Office (USIPO) is focused on the design of the viewing optics for both the edge and core MSE systems. Several design constraints were considered, including: image quality, lack of polarization aberrations, ease of construction and cost of mirrors, neutron shielding, and geometric layout in the equatorial port plugs. The edge MSE optics are located in ITER equatorial port 3 and view Heating Beam 5, and the core system is located in equatorial port 1 viewing heating beam 4. The current work is an extension of previous preliminary design work completed by the ITER central team (ITER resources were not available to complete a detailed optimization of …
Date:
March 26, 2007
Creator:
Allen, S.; Lerner, S.; Morris, K.; Jayakumar, J.; Holcomb, C.; Makowski, M. et al.
Object Type:
Report
System:
The UNT Digital Library
Groundwater Level Status Report for Fiscal Year 2006 Los Alamos National Laboratory
The status of groundwater level monitoring at Los Alamos National Laboratory in Fiscal Year 2006 is provided in this report. The Groundwater Level Monitoring Project was instituted in 2005 for providing a framework for the collection and processing of quality controlled groundwater level data. This report summarizes groundwater level data for 158 monitoring wells, including 43 regional aquifer wells, 23 intermediate wells, and 92 alluvial wells. Pressure transducers were installed in 132 monitoring wells for continuous monitoring of groundwater levels. Time-series hydrographs of groundwater level data are presented along with pertinent construction and location information for each well.
Date:
March 30, 2007
Creator:
Allen, Shannon P. & Koch, Richard J.
Object Type:
Report
System:
The UNT Digital Library
Development of a National Center for Hydrogen Technology
In November 2005, the Energy & Environmental Research Center (EERC), ePowerSynergies, Inc. (ePSI), and Resurfice Corporation teamed to develop, produce, and demonstrate the world's first and only fuel cell-powered ice resurfacer. The goals of this project were: {sm_bullet} To educate the public on the readiness, practicality, and safety of fuel cells powered by hydrogen fuel and {sm_bullet} To establish a commercialization pathway in an early-adopter, niche market. The vehicle was developed and produced in a short 3-month span. The vehicle made its world debut at U.S. Senator Byron Dorgan's (D-ND) 2005 Hydrogen Energy Action Summit. Subsequently, the vehicle toured North America appearing at numerous public events and conferences, receiving much attention from international media outlets.
Date:
March 1, 2007
Creator:
Almlie, Jay C.; Wood, Bruce & Schlupp, Rich
Object Type:
Report
System:
The UNT Digital Library
Quasar H II Regions During Cosmic Reionization
Cosmic reionization progresses as HII regions form around sources of ionizing radiation. Their average size grows continuously until they percolate and complete reionization. We demonstrate how this typical growth can be calculated around the largest, biased sources of UV emission such as quasars by further developing an analytical model based on the excursion set formalism. This approach allows us to calculate the sizes and growth of the HII regions created by the progenitors of any dark matter halo of given mass and redshift with a minimum of free parameters. Statistical variations in the size of these pre-existing HII regions are an additional source of uncertainty in the determination of very high redshift quasar properties from their observed HII region sizes. We use this model to demonstrate that the transmission gaps seen in very high redshift quasars can be understood from the radiation of only their progenitors and associated clustered small galaxies. The fit requires the epoch of overlap to be at z = 5.8 {+-} 0.1. This interpretation makes the transmission gaps independent of the age of the quasars observed. If this interpretation were correct it would raise the prospects of using radio interferometers currently under construction to detect the …
Date:
March 30, 2007
Creator:
Alvarez, Marcelo A.; Abel, Tom & /KIPAC, Menlo Park
Object Type:
Article
System:
The UNT Digital Library