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[W. Prairie Street sign]
Photograph of the W. Prairie St. sign, taken from S. Bonnie Brae St. in Denton, Texas. The sign is visible in the center of the photograph. Buildings can be seen on either side of Bonnie Brae St.
Date:
February 25, 2012
Creator:
Chaney, Ken
Object Type:
Photograph
System:
The UNT Digital Library
[White daffodils]
Photograph of white daffodils on the University of North Texas campus.
Date:
February 25, 2012
Creator:
Chaney, Ken
Object Type:
Photograph
System:
The UNT Digital Library
[Yaupon holly]
Photograph of a yaupon holly tree on the University of North Texas campus. Clusters of red berries can be seen on a branch of the tree in the center of the photograph.
Date:
February 25, 2012
Creator:
Chaney, Ken
Object Type:
Photograph
System:
The UNT Digital Library
Doctoral Recital: 2012-04-25 - Chul Woong Chang, baritone
Recital presented at the UNT College of Music Recital Hall in partial fulfillment of the Doctor of Musical Arts (DMA) degree.
Date:
April 25, 2012
Creator:
Chang, Chul Woong
Object Type:
Sound
System:
The UNT Digital Library
Understanding Nitrogen Fixation
The purpose of our program is to explore fundamental chemistry relevant to the discovery of energy efficient methods for the conversion of atmospheric nitrogen (N{sub 2}) into more value-added nitrogen-containing organic molecules. Such transformations are key for domestic energy security and the reduction of fossil fuel dependencies. With DOE support, we have synthesized families of zirconium and hafnium dinitrogen complexes with elongated and activated N-N bonds that exhibit rich N{sub 2} functionalization chemistry. Having elucidated new methods for N-H bond formation from dihydrogen, C-H bonds and Broensted acids, we have since turned our attention to N-C bond construction. These reactions are particularly important for the synthesis of amines, heterocycles and hydrazines with a range of applications in the fine and commodity chemicals industries and as fuels. One recent highlight was the discovery of a new N{sub 2} cleavage reaction upon addition of carbon monoxide which resulted in the synthesis of an important fertilizer, oxamide, from the diatomics with the two strongest bonds in chemistry. Nitrogen-carbon bonds form the backbone of many important organic molecules, especially those used in the fertilizer and pharamaceutical industries. During the past year, we have continued our work in the synthesis of hydrazines of various substitution …
Date:
May 25, 2012
Creator:
Chirik, Paul J.
Object Type:
Report
System:
The UNT Digital Library
Radiation Field Simulation and Estimation Algorithms for a Mobile Sensor and a Stationary Unknown Source
None
Date:
July 25, 2012
Creator:
Clark, G. A.
Object Type:
Report
System:
The UNT Digital Library
Denton Record-Chronicle (Denton, Tex.), Vol. 109, No. 145, Ed. 1 Tuesday, December 25, 2012
Daily newspaper from Denton, Texas that includes local, state, and national news along with advertising.
Date:
December 25, 2012
Creator:
Cobb, Dawn
Object Type:
Newspaper
System:
The Portal to Texas History
Better Enzymes for Carbon Capture
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Innovative Materials and Processes for Advanced Carbon Capture Technologies (IMPACCT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses the development of carbonic anhydrases enzymes as part of the "Low-Cost Biological Catalyst to Enable Efficient Carbon Dioxide Capture" project.
Date:
May 25, 2012
Creator:
Codexis, Inc.
Object Type:
Text
System:
The UNT Digital Library
Chemically Accelerated Carbon Mineralization
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Innovative Materials and Processes for Advanced Carbon Capture Technologies (IMPACCT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses turning carbon dioxide exhaust into a solid as part of the "Chemical and Biological Catalytic Enhancement of Weathering of Silicate Minerals as Novel Carbon Capture and Storage" project.
Date:
May 25, 2012
Creator:
Columbia University
Object Type:
Text
System:
The UNT Digital Library
Inhibition Of Washed Sludge With Sodium Nitrite
This report describes the results of electrochemical tests used to determine the relationship between the concentration of the aggressive anions in washed sludge and the minimum effective inhibitor concentration. Sodium nitrate was added as the inhibitor because of its compatibility with the DWPF process. A minimum of 0.05M nitrite is required to inhibit the washed sludge simulant solution used in this study. When the worst case compositions and safety margins are considered, it is expected that a minimum operating limit of nearly 0.1M nitrite will be specified. The validity of this limit is dependent on the accuracy of the concentrations and solubility splits previously reported. Sodium nitrite additions to obtain 0.1M nitrite concentrations in washed sludge will necessitate the additional washing of washed precipitate in order to decrease its sodium nitrite inhibitor requirements sufficiently to remain below the sodium limits in the feed to the DWPF. Nitrite will be the controlling anion in "fresh" washed sludge unless the soluble chloride concentration is about ten times higher than predicted by the solubility splits. Inhibition of "aged" washed sludge will not be a problem unless significant chloride dissolution occurs during storage. It will be very important tomonitor the composition of washed sludge …
Date:
September 25, 2012
Creator:
Congdon, J. W. & Lozier, J. S.
Object Type:
Report
System:
The UNT Digital Library
The Monitor (Naples, Tex.), Vol. 126, No. 36, Ed. 1 Thursday, October 25, 2012
Weekly newspaper from Naples, Texas that includes local, state and national news along with advertising.
Date:
October 25, 2012
Creator:
Craig, Morris
Object Type:
Newspaper
System:
The Portal to Texas History
Higher Education Tax Benefits: Brief Overview and Budgetary Effects
This report provides a brief overview of the higher education tax benefits that are currently available to students and their families. The report contrasts higher education tax benefits with traditional student aid, presents a brief history of higher education tax policy over the past 60 years, summarizes key features of the available tax benefits, and provides JCT estimates of revenue losses resulting from individual tax provisions.
Date:
September 25, 2012
Creator:
Crandall-Hollick, Margot L.
Object Type:
Report
System:
The UNT Digital Library
An Overview and Comparison of Senate Proposals to Extend the “Bush Tax Cuts”: S. 3412 and S. 3413
This report provides an overview of the Bush tax cuts, followed by brief summaries of the Reid and Hatch proposals, respectively. Revenue loss estimates of certain provisions of these bills are also included, as well as a brief summary of H.R. 8. In addition, detailed summary tables comparing the Reid and Hatch proposals—to each other and to current law—are provided. Finally, this report concludes with a brief overview of the current policy debate surrounding the partial or full extension of the Bush tax cuts.
Date:
July 25, 2012
Creator:
Crandall-Hollick, Margot L.
Object Type:
Report
System:
The UNT Digital Library
Residential Energy Tax Credits: Overview and Analysis
This report explores one policy option for promoting residential energy efficiency: tax credits. It begins by providing an overview of the current residential energy-efficiency tax credits. The report then goes on to provide an economic rationale for residential energy-efficiency tax incentives, introducing the concept of "market failures" and "market barriers" which may lead to suboptimal or "economically inefficient" investment in energy-efficiency technologies. The final sections of this report provide an economic analysis of the primary tax incentives for residential energy efficiency and briefly review various policy options.
Date:
September 25, 2012
Creator:
Crandall-Hollick, Margot L. & Sherlock, Molly F.
Object Type:
Report
System:
The UNT Digital Library
Progress in Studies of Electron-Cloud-Induced Optics Distortions at CesrTA
The Cornell Electron Storage Ring Test Accelerator (CesrTA) program has included extensive measurements of coherent betatron tune shifts for a variety of electron and positron beam energies, bunch population levels, and bunch train configurations. The tune shifts have been shown to result primarily from the interaction of the beam with the space-charge field of the beam-induced low-energy electron cloud in the vacuum chamber. Comparison to several advanced electron cloud simulation codes has allowed determination of the sensitivity of these measurements to physical parameters characterizing the synchrotron radiation flux, the production of photo-electrons on the vacuum chamber wall, the beam emittance, lattice optics, and the secondary-electron yield model. We report on progress in understanding the cloud buildup and decay mechanisms in magnetic fields and in field-free regions, addressing quantitatively the precise determination of the physical parameters of the modeling. Validation of these models will serve as essential input in the design of damping rings for future high-energy linear colliders.
Date:
June 25, 2012
Creator:
Crittenden, James; /Cornell U., CLASSE; Calvey, Joseph; /Cornell U., CLASSE; Dugan, Gerald; /Cornell U., CLASSE et al.
Object Type:
Article
System:
The UNT Digital Library
SMALL-SCALE TESTING OF PLUTONIUM (IV) OXALATE PRECIPITATION AND CALCINATION TO PLUTONIUM OXIDE TO SUPPORT THE MOX FEED MISSION
The H-Canyon facility will be used to dissolve Pu metal for subsequent purification and conversion to plutonium dioxide (PuO{sub 2}) using Phase II of HB-Line. To support the new mission, SRNL conducted a series of experiments to produce calcined plutonium (Pu) oxide and measure the physical properties and water adsorption of that material. This data will help define the process operating conditions and material handling steps for HB-Line. An anion exchange column experiment produced 1.4 L of a purified 52.6 g/L Pu solution. Over the next nine weeks, seven Pu(IV) oxalate precipitations were performed using the same stock Pu solution, with precipitator feed acidities ranging from 0.77 M to 3.0 M nitric acid and digestion times ranging from 5 to 30 minutes. Analysis of precipitator filtrate solutions showed Pu losses below 1% for all precipitations. The four larger precipitation batches matched the target oxalic acid addition time of 44 minutes within 4 minutes. The three smaller precipitation batches focused on evaluation of digestion time and the oxalic acid addition step ranged from 25-34 minutes because of pump limitations in the low flow range. Following the precipitations, 22 calcinations were performed in the range of 610-690 C, with the largest number …
Date:
June 25, 2012
Creator:
Crowder, M.; Pierce, R.; Scogin, J.; Daniel, G. & King, W.
Object Type:
Report
System:
The UNT Digital Library
COMMENTS ON RESIDENT FARMER DCGLs FOR SITE SOILS AT THE CURTISS-WRIGHT SITE IN CHESWICK, PENNSYLVANIA DCN: 5000-TR-04-0
Oak Ridge Associated Universities (ORAU), via the Oak Ridge Institute for Science and Education contract, evaluated the Enercon Services, Inc. report on site soils derived concentration guideline levels (DCGLs). The RESRAD code Version 6.5 was used in deterministic mode to consider a range of radionuclides and potential future receptors. A standard sensitivity analysis was also included, along with a probabilistic analysis to select conservative input values for the most sensitive physical parameters.
Date:
April 25, 2012
Creator:
DAVID KING, CHP
Object Type:
Report
System:
The UNT Digital Library
Manganese-Aluminum-Based Magnets
Advanced Research Projects Agency-Energy project sheet summarizing general information about the Rare Earth Alternatives in Critical Technologies (REACT) program including critical needs, innovation and advantages, impacts, and contact information. This sheet discusses the development of specialized magnetic alloys as part of the "Nanocrystalline t-MnAI Permanent Magnets" project.
Date:
May 25, 2012
Creator:
Dartmouth College
Object Type:
Text
System:
The UNT Digital Library
NanoComposite Stainless Steel Powder Technologies
Oak Ridge National Laboratory has been investigating a new class of Fe-based amorphous material stemming from a DARPA, Defense Advanced Research Projects Agency initiative in structural amorphous metals. Further engineering of the original SAM materials such as chemistry modifications and manufacturing processes, has led to the development of a class of Fe based amorphous materials that upon processing, devitrify into a nearly homogeneous distribution of nano sized complex metal carbides and borides. The powder material is produced through the gas atomization process and subsequently utilized by several methods; laser fusing as a coating to existing components or bulk consolidated into new components through various powder metallurgy techniques (vacuum hot pressing, Dynaforge, and hot isostatic pressing). The unique fine scale distribution of microstructural features yields a material with high hardness and wear resistance compared to material produced through conventional processing techniques such as casting while maintaining adequate fracture toughness. Several compositions have been examined including those specifically designed for high hardness and wear resistance and a composition specifically tailored to devitrify into an austenitic matrix (similar to a stainless steel) which poses improved corrosion behavior.
Date:
July 25, 2012
Creator:
DeHoff, R. & Glasgow, C. (MesoCoat, Inc.)
Object Type:
Report
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Friday, May 25, 2012
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
May 25, 2012
Creator:
DeSilver, Debi
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Saturday, February 25, 2012
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 25, 2012
Creator:
DeSilver, Debi
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, April 25, 2012
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
April 25, 2012
Creator:
DeSilver, Debi
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Express-Star (Chickasha, Okla.), Ed. 1 Wednesday, January 25, 2012
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 25, 2012
Creator:
DeSilver, Debi
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Brownwood Bulletin (Brownwood, Tex.), Vol. 112, No. 165, Ed. 1 Wednesday, April 25, 2012
Weekly newspaper from Brownwood, Texas that includes local, state and national news along with advertising.
Date:
April 25, 2012
Creator:
Deason, Gene
Object Type:
Newspaper
System:
The Portal to Texas History