Partner
UNT Libraries Government Documents Department
516
UNT Libraries Special Collections
46
Oklahoma Historical Society
41
UNT Libraries
28
UNT Honors College
25
Sterling Municipal Library
11
National Museum of the Pacific War/Admiral Nimitz Foundation
8
San Antonio Public Library
7
Carl Albert Congressional Research and Studies Center
4
Comanche Public Library
4
42 More
Collection
Office of Scientific & Technical Information Technical Reports
372
Texas Digital Newspaper Program
105
Congressional Research Service Reports
85
Oklahoma Digital Newspaper Program
46
Tocker Foundation Grant
41
Government Accountability Office Reports
35
Multicultural Center Records
25
UNT Undergraduate Student Works
24
The Greensheet
23
Defense Base Closure and Realignment Commission
18
78 More
States
Year
Month
Day
Language
762 Matching Results
Results open in a new window/tab.
Carbon Dioxide Separation from Flue Gas by Phase Enhanced Absorption
A new process, phase enhanced absorption, was invented. The method is carried out in an absorber, where a liquid carrier (aqueous solution), an organic mixture (or organic compound), and a gas mixture containing a gas to be absorbed are introduced from an inlet. Since the organic mixture is immiscible or at least partially immiscible with the liquid carrier, the organic mixture forms a layer or small parcels between the liquid carrier and the gas mixture. The organic mixture in the absorber improves mass transfer efficiency of the system and increases the absorption rate of the gas. The organic mixture serves as a transportation media. The gas is finally accumulated in the liquid carrier as in a conventional gas-liquid absorption system. The presence of the organic layer does not hinder the regeneration of the liquid carrier or recovery of the gas because the organic layer is removed by a settler after the absorption process is completed. In another aspect, the system exhibited increased gas-liquid separation efficiency, thereby reducing the costs of operation and maintenance. Our study focused on the search of the organic layer or transportation layer to enhance the absorption rate of carbon dioxide. The following systems were studied, (1) …
Date:
June 30, 2006
Creator:
Hu, Liang
Object Type:
Report
System:
The UNT Digital Library
Cargo Container Inspections: Preliminary Observations on the Status of Efforts to Improve the Automated Targeting System
A statement of record issued by the Government Accountability Office with an abstract that begins "U.S. Customs and Border Protection's (CBP) Automated Targeting System (ATS)--a computerized model that CBP officers use as a decision support tool to help them target oceangoing cargo containers for inspection--is part of CBP's layered approach to securing oceangoing cargo. GAO reported in February 2004 on challenges CBP faced in targeting oceangoing cargo containers for inspection and testified before Congress in March 2004 about the findings in that report. The report and testimony outlined recommendations aimed at (1) better incorporating recognized modeling practices into CBP's targeting strategy, (2) periodically adjusting the targeting strategy to respond to findings that occur during the course of its operation, and (3) improving implementation of the targeting strategy. This statement for the record discusses preliminary observations from GAO's ongoing work related to ATS and GAO's 2004 recommendations addressing the following questions: (1) What controls does CBP have in place to provide reasonable assurance that ATS is effective at targeting oceangoing cargo containers with the highest risk of smuggled weapons of mass destruction? (2) How does CBP systematically analyze security inspection results and incorporate them into ATS? and (3) What steps has …
Date:
March 30, 2006
Creator:
United States. Government Accountability Office.
Object Type:
Text
System:
The UNT Digital Library
[Cassandra Berry presenting Lisa Ling with gift]
A photograph of Cassandra Berry and Lisa Ling standing behind a wooden podium during a UNT Department of Equity and Diversity event. Berry is presenting Ling with a gift on behalf of the department for speaking at the event. There is a sign on the front of the podium with the UNT logo and name on it as well.
Date:
March 30, 2006
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
Central Nevada Test Area Monitoring Report
Water level measurements were performed and water samples collected from the Central Nevada Test Area model validation wells in September 2006. Hydraulic head measurements were compared to previous observations; the MV wells showed slight recovery from the drilling and testing operation in 2005. No radioisotopes exceeded limits set in the Corrective Action Decision Document/Corrective Action Plan, and no significant trends were observed when compared to previous analyses.
Date:
September 30, 2006
Creator:
Lyles, Brad; Chapman, Jenny; Healey, John & Gillespie, David
Object Type:
Report
System:
The UNT Digital Library
CFD Simulation of Flow Tones from Grazing Flow past a Deep Cavity
None
Date:
May 30, 2006
Creator:
Bagwell, T.
Object Type:
Report
System:
The UNT Digital Library
Characterization of In-Situ Stress and Permeability in Fractured Reservoirs
Fracture orientation and spacing are important parameters in reservoir development. This project resulted in the development and testing of a new method for estimating fracture orientation and two new methods for estimating fracture spacing from seismic data. The methods developed were successfully applied to field data from fractured carbonate reservoirs. Specific results include: the development a new method for estimating fracture orientation from scattered energy in seismic data; the development of two new methods for estimating fracture spacing from scattered energy in seismic data; the successful testing of these methods on numerical model data and field data from two fractured carbonate reservoirs; and the validation of fracture orientation results with borehole data from the two fields. Researchers developed a new method for determining the reflection and scattering characteristics of seismic energy from subsurface fractured formations. The method is based upon observations made from 3D finite difference modeling of the reflected and scattered seismic energy over discrete systems of vertical fractures. Regularly spaced, discrete vertical fractures impart a ringing coda type signature to seismic energy that is transmitted through or reflected off of them. This signature varies in amplitude and coherence as a function of several parameters including: (1) the difference …
Date:
June 30, 2006
Creator:
Burns, Daniel R. & Toksoz, M. Nafi
Object Type:
Report
System:
The UNT Digital Library
CHARGED PARTICLE PRODUCTION AT HIGH RAPIDITY IN p+p COLLISIONS AT RHIC.
This report describes the recent analysis of identified charged particle production at high rapidity performed on data collected from p+p collisions at RHIC ({radical}s = 200 GeV). The extracted invariant cross-sections compare well to NLO pQCD calculations. However, a puzzling high yield of protons at high rapidity and p{sub T} has been found.
Date:
May 30, 2006
Creator:
DEBBE,R.
Object Type:
Article
System:
The UNT Digital Library
CHEMISTRY OF SO2 AND DESOX PROCESSES ON OXIDE NANOPARTICLES.
On bulk stoichiometric oxides, SO{sub 2} mainly reacts with the O centers to form SO{sub 3} or SO{sub 4} species that decompose at elevated temperatures. Adsorption on the metal cations occurs below 300 K and does not lead to cleavage of the S-O bonds. In bulk oxides, the occupied cation bands are too stable for effective bonding interactions with the LUMO of SO{sub 2}. The effects of quantum confinement on the electronic properties of oxide nanoparticles and the structural defects that usually accompany these systems in general favor the bonding and dissociation of SO{sub 2}. Thus, nanoparticles of MgO, CaO, SrO, Al{sub 2}O{sub 3}, Fe{sub 2}O{sub 3} and CeO{sub 2} are all more efficient for sequestering SO{sub 2} than the corresponding bulk oxides. Structural imperfections in pure or metal-doped ceria nanoparticles accelerate the reduction of SO{sub 2} by CO by facilitating the formation and migration of O vacancies in the oxide surface.
Date:
June 30, 2006
Creator:
Rodriguez, J. A.
Object Type:
Report
System:
The UNT Digital Library
Cherokee Nation Enterprises Wind Energy Feasibility Study Final Report to U.S. DOE
CNE has conducted a feasibility study on the Chilocco property in north-central Oklahoma since the grant award on July 20, 2003. This study has concluded that there is sufficient wind for a wind farm and that with the Production Tax Credits and Green Tags, there will be sufficient energy to, not only cover the costs of the Nation’s energy needs, but to provide a profit. CNE has developed a wind energy team and is working independently and with industry partners to bring its renewable energy resources to the marketplace. We are continuing with the next phase in conducting avian, cultural and transmission studies, as well as continuing to measure the wind with the SoDAR unit. Cherokee Nation Enterprises, Inc. is a wholly-owned corporation under Cherokee Nation and has managed the Department of Energy grant award since July 20, 2003. In summary, we have determined there is sufficient wind for a wind farm at the Chilocco property where Cherokee Nation owns approximately 4,275 acres. The primary goal would be more of a savings in light of the electricity used by Cherokee Nation and its entities which totals an estimated eight million dollars per year. Cherokee Nation Enterprises (CNE), working independently and …
Date:
April 30, 2006
Creator:
Wyatt, Carol E.
Object Type:
Report
System:
The UNT Digital Library
Cherokeean Herald (Rusk, Tex.), Vol. 157, No. 28, Ed. 1 Wednesday, August 30, 2006
Weekly newspaper from Rusk, Texas that includes local, state and national news along with extensive advertising.
Date:
August 30, 2006
Creator:
Whitehead, Marie
Object Type:
Newspaper
System:
The Portal to Texas History
[Cheylon Brown in MC office]
A photograph of Cheylon Brown standing in the UNT Multicultural Center offices. She is wearing a green polo shirt showing that she works with the Multicultural Center. Behind her the decorations in the office and trophies are visible.
Date:
August 30, 2006
Creator:
University of North Texas. Multicultural Center.
Object Type:
Photograph
System:
The UNT Digital Library
[Church and Synagogue Library Association 2006 logo]
Photograph of the Church and Synagogue Library Association 2006 logo used for the 39th annual CSLA conference, held in Greensboro, North Carolina during July 30 - August 1, 2006.
Date:
2006-07-30~
Creator:
unknown
Object Type:
Photograph
System:
The UNT Digital Library
The Clifton Record (Clifton, Tex.), Vol. 111, No. 26, Ed. 1 Friday, June 30, 2006
Weekly newspaper from Clifton, Texas that includes local, state, and national news along with advertising.
Date:
June 30, 2006
Creator:
Smith, W. Leon
Object Type:
Newspaper
System:
The Portal to Texas History
[Clipping: WWII fliers no longer forgotten]
Newspaper clipping from the Daily Herald, "WWII fliers no longer forgotten" by Harry Hitzeman. Pictured are Caroline Lindgren Collings of the Collings Foundation and Mark Hull in the B-17G. Also pictured is WASP Julie Stege.
Date:
July 30, 2006
Creator:
Hitzeman, Harry
Object Type:
Clipping
System:
The Portal to Texas History
Clustering of High Redshift (z>2.9) Quasars from the Sloan Digital Sky Survey
We study the two-point correlation function of a uniformly selected sample of 4,428 optically selected luminous quasars with redshift 2.9 {le} z {le} 5.4 selected over 4041 deg{sup 2} from the Fifth Data Release of the Sloan Digital Sky Survey. We fit a power-law to the projected correlation function w{sub p}(r{sub p}) to marginalize over redshift space distortions and redshift errors. For a real-space correlation function of the form {zeta}(r) = (r/r{sub 0}){sup -{gamma}}, the fitted parameters in comoving coordinates are r{sub 0} = 15.2 {+-} 2.7 h{sup -1} Mpc and {gamma} = 2.0 {+-} 0.3, over a scale range 4 {le} r{sub p} {le} 150 h{sup -1} Mpc. Thus high-redshift quasars are appreciably more strongly clustered than their z {approx} 1.5 counterparts, which have a comoving clustering length r{sub 0} {approx} 6.5 h{sup -1} Mpc. Dividing our sample into two redshift bins: 2.9 {le} z {le} 3.5 and z {ge} 3.5, and assuming a power-law index {gamma} = 2.0, we find a correlation length of r{sub 0} = 16.9 {+-} 1.7 h{sup -1} Mpc for the former, and r{sub 0} = 24.3 {+-} 2.4 h{sup -1} Mpc for the latter. Strong clustering at high redshift indicates that quasars are …
Date:
November 30, 2006
Creator:
Shen, Yue; Strauss, Michael A.; Oguri, Masamune; Hennawi, Joseph F.; Fan, Xiaohui; Richards, Gordon T. et al.
Object Type:
Article
System:
The UNT Digital Library
CMC Bench Scale Material Test Plan
The test plan detailed in this topical report supports Task 3.5 of the project titled ''Development of Technologies and Capabilities for Coal Energy Resources - Advanced Gasification Systems Development (AGSD)''. The purpose of these tests is to verify that materials planned for use in an advanced gasifier pilot plant will withstand the environments in a commercial gasifier. Pratt & Whitney Rocketdyne (PWR) has developed this test plan with technical assistance from ceramic scientists at the Dept. of Energy Oak Ridge National Laboratory and Albany Research Center who will perform the environmental exposure tests.
Date:
May 30, 2006
Creator:
Fitzsimmons, Mark; Pelletier, Gerard & Grimmett, Dave
Object Type:
Report
System:
The UNT Digital Library
CO-PRODUCTION OF HYDROGEN AND ELECTRICITY USING PRESSURIZED CIRCULATING FLUIDIZED BED GASIFICATION TECHNOLOGY
Foster Wheeler has completed work under a U.S. Department of Energy cooperative agreement to develop a gasification equipment module that can serve as a building block for a variety of advanced, coal-fueled plants. When linked with other equipment blocks also under development, studies have shown that Foster Wheeler's gasification module can enable an electric generating plant to operate with an efficiency exceeding 60 percent (coal higher heating value basis) while producing near zero emissions of traditional stack gas pollutants. The heart of the equipment module is a pressurized circulating fluidized bed (PCFB) that is used to gasify the coal; it can operate with either air or oxygen and produces a coal-derived syngas without the formation of corrosive slag or sticky ash that can reduce plant availabilities. Rather than fuel a gas turbine for combined cycle power generation, the syngas can alternatively be processed to produce clean fuels and or chemicals. As a result, the study described herein was conducted to determine the performance and economics of using the syngas to produce hydrogen for sale to a nearby refinery in a hydrogen-electricity co-production plant setting. The plant is fueled with Pittsburgh No. 8 coal, produces 99.95 percent pure hydrogen at a …
Date:
May 30, 2006
Creator:
Fan, Zhen
Object Type:
Report
System:
The UNT Digital Library
CO2 Capture by Absorption with Potassium Carbonate
The objective of this work is to improve the process for CO{sub 2} capture by alkanolamine absorption/stripping by developing an alternative solvent, aqueous K{sub 2}CO{sub 3} promoted by piperazine. Ethylenediamine was detected in a degraded solution of MEA/PZ solution, suggesting that piperazine is subject to oxidation. Stripper modeling has demonstrated that vacuum strippers will be more energy efficient if constructed short and fat rather than tall and skinny. The matrix stripper has been identified as a configuration that will significantly reduce energy use. Extensive measurements of CO{sub 2} solubility in 7 m MEA at 40 and 60 C have confirmed the work by Jou and Mather. Corrosion of carbon steel without inhibitors increases from 19 to 181 mpy in lean solutions of 6.2 m MEA/PZ as piperazine increases from 0 to 3.1 m.
Date:
September 30, 2006
Creator:
Rochelle, Gary T.; Chen, Eric; Oyenekan, Babatunde; Sexton, Andrew; Davis, Jason; Hilliard, Marcus et al.
Object Type:
Report
System:
The UNT Digital Library
The Collegian (Hurst, Tex.), Vol. 19, No. 1, Ed. 1 Wednesday, August 30, 2006
Weekly student newspaper published in Hurst, Texas serving the Tarrant County College District that includes school news and information along with advertising.
Date:
August 30, 2006
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Colony Courier-Leader (The Colony, Tex.), Vol. 25, No. 30, Ed. 1 Wednesday, August 30, 2006
Weekly newspaper from The Colony, Texas that includes local, state, and national news along with advertising.
Date:
August 30, 2006
Creator:
Crimmins, Blaine
Object Type:
Newspaper
System:
The Portal to Texas History
Comanche Chief (Comanche, Tex.), No. 31, Ed. 1 Thursday, November 30, 2006
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
November 30, 2006
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
Comanche Chief (Comanche, Tex.), No. 48, Ed. 1 Thursday, March 30, 2006
Weekly newspaper from Comanche, Texas that includes local, state, and national news along with advertising.
Date:
March 30, 2006
Creator:
Wilkerson, James C., III
Object Type:
Newspaper
System:
The Portal to Texas History
Community Correspondence
Contains Community Correspondence to the BRAC Commission regarding NAS Oceana, VA
Date:
March 30, 2006
Creator:
unknown
Object Type:
Letter
System:
The UNT Digital Library
Compaction of Expancel Microspheres and Epoxy Foam to 3 GPa
Pressure-volume relationships were measured for unexpanded Expancel microspheres, epoxy foam and one specimen of crushed foam powder. The specimens were jacketed in tin canisters and compressed at ambient temperature and low strain rates to 3 GPa in a solid medium press. Pressures were corrected for friction, and specimen volumes were calculated relative to a nickel standard. The pressure-volume curves for each material show large volume reductions at pressures below 0.1 GPa. The curves stiffen sharply at or near full density. Relatively little volume reduction is observed above 0.1 GPa, and most is recovered on unloading. The energy expended in compressing the materials to 3 GPa and the energy recovered on unloading were determined by numerically integrating the pressure-volume curves. The net energy, which includes absorbed energy, was found to be small. Compressibilities and bulk moduli were determined from the slopes of the pressure-volume curves. The Expancel bulk modulus above 0.1 GPa was found to be similar to that of isopentane. The pressure-volume data were fit to a model from the ceramics literature (Kawakita and Ludde, 1970). The model fits provided estimates of the initial specimen porosities and room pressure bulk moduli.
Date:
January 30, 2006
Creator:
Carlson, S R; Bonner, B P; Ryerson, F J & Chow, C S
Object Type:
Report
System:
The UNT Digital Library