Partner
UNT Libraries Government Documents Department
258
Oklahoma Historical Society
48
UNT Libraries Special Collections
42
UNT Libraries
39
Sterling Municipal Library
12
UNT Music Library
8
National Museum of the Pacific War/Admiral Nimitz Foundation
6
Patrick Heath Public Library
5
San Antonio Public Library
5
Abilene Christian University Library
4
44 More
Collection
Office of Scientific & Technical Information Technical Reports
140
Texas Digital Newspaper Program
126
Congressional Research Service Reports
91
Oklahoma Digital Newspaper Program
53
Tocker Foundation Grant
36
The Greensheet
30
Government Accountability Office Reports
20
College of Music Marketing Collection
19
The Baytown Sun
12
Altus Times-Democrat
11
81 More
Degree Department
Degree Discipline
Degree Level
Year
Month
Day
Results:
1 - 24 of
495
next
The Altus Times (Altus, Okla.), Vol. 108, No. 237, Ed. 1 Tuesday, January 2, 2007
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 37, Ed. 1 Tuesday, January 2, 2007
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
Boerne Star & Recorder (Boerne, Tex.), Vol. 101, No. 1, Ed. 1 Tuesday, January 2, 2007
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Coordination Environments of Highly Charged Cations (Ti, Cr, and Light REE's) in Borosilicate Glass/Melts to 1120C
The local environments around Ti, Cr, and several light rare-earth elements (La, Ce, and Nd) were investigated by in-situ XANES spectroscopy in a number of complex borosilicate glasses and melts (to 1120 C) that are used for nuclear waste storage. Examination of the high-resolution XANES spectra at the Ti K-edge shows that the average coordination of Ti changes from {approx}5 to {approx}4.5. Cr is dominantly trivalent in the melts studied. However, its average coordination is probably lower in the melt (tetrahedral ?) as revealed by the more intense Cr-K pre-edge feature. Ce also changes its average valence from dominantly +4 to +3.5 upon glass melting. These changes are reversible at T{sub g}, the glass transition temperature ({approx}500-550 C for these glasses). In contrast, the local environments of Nd, Pr, and La are unaffected by melting. Therefore, structural reorganization of these borosilicate glass/melts above T{sub g} is variable, not only in terms of valence (as for Ce) but also speciation (Ti and Cr). Both the ability of B to adopt various coordination geometries (triangular and tetrahedral) and the chemical complexity of the glass/melts explain these changes.
Date:
January 2, 2007
Creator:
Farges, Francois; /Museum Natl. Hist. Natur. /Stanford U., Geo. Environ. Sci.; Brown, Gordon E., Jr. & /Stanford U., Geo. Environ Sci. /SLAC, SSRL
Object Type:
Article
System:
The UNT Digital Library
Detecting and Quantifying Reductive Dechlorination During Monitored Natural Attenuation at the Savannah River CBRP Site
Various attenuation mechanisms control the destruction, stabilization, and/or removal of contaminants from contaminated subsurface systems. Measuring the rates of the controlling attenuation mechanisms is a key to employing mass balance as a means to evaluate and monitor the expansion, stability and subsequent shrinkage of a contaminant plume. A team of researchers investigated the use of push-pull tests for measuring reductive dechlorination rates in situ at sites with low chlorinated solvent concentrations (<1 ppm). The field research also examined the synergistic use of a suite of geochemical and microbial assays. Previous push-pull tests applied to environmental remediation objectives focused on general hydrological characterization or on designing bioremediation systems by examining the response of the subsurface to stimulation. In this research, the push-pull technique was tested to determine its ''low-range'' sensitivity and uncertainty. Can these tests quantify relatively low attenuation rates representative of natural attenuation? The results of this research indicate that push-pull testing will be useful for measurement of in situ reductive dechlorination rates for chlorinated solvents at ''Monitored Natural Attenuation'' (MNA) sites. Further, using principal component analysis and other techniques, the research confirmed the usefulness of multiple lines of evidence in site characterization and in upscaling measurements made in individual …
Date:
January 2, 2007
Creator:
Vangelas, K; Istok, Jack D.; Field, Jennifer A.; Raes, Eric; Margaret Millings, M & Peacock, Aaron D.
Object Type:
Report
System:
The UNT Digital Library
Determine the yield of micronucleated cells in primary human fibroblasts exposed to focused soft X-rays.
This project was a small part of a larger collaborative study headed by Dr Aloke Chatterjee, (Lawrence Berkeley National Laboratory) and including Drs Les Braby, John Ford (Texas A&M) and Kathy Held (MGH Boston), which was developing an integrated theoretical and experimental model of the radiation-induced bystander response. Our part of the study has been to determine the effectiveness of soft X-rays at inducing chromosomal damage under conditions of direct and bystander exposure. The aim was to compare this with the effectiveness of the low energy 60 kV electron microbeam available at Texas A&M. Previous studies have been performed with primary human fibroblasts measuring micronuclei formation to determine the relative yields of direct versus bystander mediated micronuclei formation after cells were individually irradiated utilizing our novel focused soft X-ray microprobe, which is capable of producing localized submicron beams of carbon-K (278 eV) X-rays. Only a brief overview is given here as the study has been published in several papers. Our original hypothesis was to study yields of bystander-induced micronucleated cells in both wild-type and mutant fibroblast from mouse embryo fibroblasts. Difficulties with the level of background micronuclei in the MEFs prevented systematic studies of bystander responses in the laboratories involved …
Date:
January 2, 2007
Creator:
Prise, Kevin M.
Object Type:
Report
System:
The UNT Digital Library
Durability of Silicate Glasses: An Historical Approach
We present a short review of current theories of glass weathering, including glass dissolution, and hydrolysis of nuclear waste glasses, and leaching of historical glasses from an XAFS perspective. The results of various laboratory leaching experiments at different timescales (30 days to 12 years) are compared with results for historical glasses that were weathered by atmospheric gases and soil waters over 500 to 3000 years. Good agreement is found between laboratory experiments and slowly leached historical glasses, with a strong enrichment of metals at the water/gel interface. Depending on the nature of the transition elements originally dissolved in the melt, increasing elemental distributions are expected to increase with time for a given glass durability context.
Date:
January 2, 2007
Creator:
Farges, Francois; /Museum Natl. Hist. Natur. /Stanford U., Geo. Environ. Sci.; Etcheverry, Marie-Pierre; U., /Marne la Vallee; Haddi, Amine; U., /Marne la Valle et al.
Object Type:
Article
System:
The UNT Digital Library
The Express-Star (Chickasha, Okla.), Ed. 1 Tuesday, January 2, 2007
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Bush, Kent
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Greensheet (Houston, Tex.), Vol. 37, No. 565, Ed. 1 Tuesday, January 2, 2007
Free weekly newspaper that includes business and classified advertising.
Date:
January 2, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Greensheet (Houston, Tex.), Vol. 37, No. 566, Ed. 1 Tuesday, January 2, 2007
Free weekly newspaper that includes business and classified advertising.
Date:
January 2, 2007
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
LONG-TERM CHANGES IN MERCURY CONCENTRATIONS IN FISH FROM THE MIDDLE SAVANNAH RIVER
Total mercury levels were measured in largemouth bass (Micropterus salmoides), ''sunfishes'' (Lepomis spp)., and ''catfish'' (primarily Ameiurus spp.) from 1971 to 2004 in the middle reaches of the Savannah River, which drains the coastal plain of the southeastern U.S. Mercury levels were highest in 1971 but declined over the next ten years due to the mitigation of point sources of industrial pollution. Mercury levels began to increase in the 1980s as a possible consequence of mercury inputs from tributaries and associated wetlands where mercury concentrations were significantly elevated in water and fish. Mercury levels in Savannah River fish decreased sharply in 2001-2003 coincident with a severe drought in the Savannah River basin, but returned to previous levels in 2004 with the resumption of normal precipitation. Regression models showed that mercury levels in Savannah River fish changed significantly over time and were affected by river discharge. Despite temporal changes, there was little overall difference in Savannah River fish tissue mercury levels between 1971 and 2004.
Date:
January 2, 2007
Creator:
Paller, M & Bill Littrell, B
Object Type:
Article
System:
The UNT Digital Library
Medicare: A Primer
None
Date:
January 2, 2007
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
New Developments in Charge Transfer Multiplet Calculations: Projection Operations, Mixed-Spin States and pi-Bonding
This paper presents a number of new additions to the charge transfer multiplet calculations as used in the calculation of L edge X-ray absorption spectra of 3d and 4d transition metal systems, both oxides and coordination compounds. The focus of the paper is on the consequences of the optimized spectral simulations for the ground state, where we make use of a recently developed projection technique. This method is also used to develop the concept of a mixed-spin ground state, i.e. a state that is a mixture of a high-spin and low-spin state due to spin-orbit coupling combined with strong covalency. The charge transfer mechanism to describe {pi}-bonding uses the mixing of the metal-to-ligand charge transfer (MLCT) channel in addition to the normal CT channel and allows for the accurate simulation of {pi}-bonding systems, for example cyanides.
Date:
January 2, 2007
Creator:
de Groot, F.M.F.; U., /Utrecht; Hocking, R.K.; /Stanford U., Chem. Dept.; Piamonteze, C.; /LBL, Berkeley et al.
Object Type:
Article
System:
The UNT Digital Library
Perry Daily Journal (Perry, Okla.), Vol. 115, No. 1, Ed. 1 Tuesday, January 2, 2007
Daily newspaper from Perry, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Brown, Gloria
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Plasma Production via Field Ionization
Plasma production via field ionization occurs when an incoming particle beam is sufficiently dense that the electric field associated with the beam ionizes a neutral vapor or gas. Experiments conducted at the Stanford Linear Accelerator Center explore the threshold conditions necessary to induce field ionization by an electron beam in a neutral lithium vapor. By independently varying the transverse beam size, number of electrons per bunch or bunch length, the radial component of the electric field is controlled to be above or below the threshold for field ionization. Additional experiments ionized neutral xenon and neutral nitric oxide by varying the incoming beam's bunch length. A self-ionized plasma is an essential step for the viability of plasma-based accelerators for future high-energy experiments.
Date:
January 2, 2007
Creator:
O'Connell, C. L.; Barnes, C. D.; Decker, F.; Hogan, M. J.; Iverson, R.; Krejcik, P. et al.
Object Type:
Article
System:
The UNT Digital Library
Rains County Leader (Emory, Tex.), Vol. 119, No. 29, Ed. 1 Tuesday, January 2, 2007
Weekly newspaper from Emory, Texas that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Hill, Earl Clyde, Jr.
Object Type:
Newspaper
System:
The Portal to Texas History
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 92, No. 45, Ed. 1 Tuesday, January 2, 2007
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Mattox, Jami
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Sealy News (Sealy, Tex.), Vol. 120, No. 1, Ed. 1 Tuesday, January 2, 2007
Semiweekly newspaper from Sealy, Texas that includes local, state, and national news along with advertising.
Date:
January 2, 2007
Creator:
Eddleman, Mike & Dang, Tracy
Object Type:
Newspaper
System:
The Portal to Texas History
Study of the OCS6 Lattice Using Frequency Maps
Frequency maps are employed to study the baseline dampingring lattice. The study is aimed at understanding the reduced dynamicaperture in the lattice with four short straight sections compared to theone with eight short straight sections. Measures to increase the dynamicaperture based on results of this study are suggested.
Date:
January 2, 2007
Creator:
Reichel, Ina
Object Type:
Report
System:
The UNT Digital Library
USING STATISTICAL PROCESS CONTROL TO MONITOR RADIOACTIVE WASTE CHARACTERIZATION AT A RADIOACTIVE FACILITY
Two facilities for storing spent nuclear fuel underwater at the Hanford site in southeastern Washington State are being removed from service, decommissioned, and prepared for eventual demolition. The fuel-storage facilities consist of two separate basins called K East (KE) and K West (KW) that are large subsurface concrete pools filled with water, with a containment structure over each. The basins presently contain sludge, debris, and equipment that have accumulated over the years. The spent fuel has been removed from the basins. The process for removing the remaining sludge, equipment, and structure has been initiated for the basins. Ongoing removal operations generate solid waste that is being treated as required, and then disposed. The waste, equipment and building structures must be characterized to properly manage, ship, treat (if necessary), and dispose as radioactive waste. As the work progresses, it is expected that radiological conditions in each basin may change as radioactive materials are being moved within and between the basins. It is imperative that these changing conditions be monitored so that radioactive characterization of waste is adjusted as necessary.
Date:
January 2, 2007
Creator:
Westcott, J. L.; Jochen, R. M. & Prevette, S. S.
Object Type:
Article
System:
The UNT Digital Library
Water-Steel Canister Interaction and H2 Gas Pressure Buildup in aNuclear Waste Repository
Corrosion of steel canisters, stored in a repository forspent fuel and high-level waste, leads to hydrogen gas generation in thebackfilled emplacement tunnels, which may significantly affect long-termrepository safety. Previous modeling studies used a constant H2generation rate. However, iron corrosion and H2 generation rates varywith time, depending on factors such as water chemistry, wateravailability, and water contact area. To account for these factors andfeedback mechanisms, we developed a chemistry model related to ironcorrosion, coupled with two-phase (liquid and gas) flow phenomena thatare driven by gas pressure buildup and water consumption. Resultsindicate that if H2 generation rates are dynamically calculated based ona chemistry model, the degree and extent of gas pressure buildup are muchsmaller compared to a simulation in which the coupling between flow andreactive transport mechansism is neglected.
Date:
January 2, 2007
Creator:
Xu, Tianfu; Senger, Rainer & Finstele, Stefan
Object Type:
Article
System:
The UNT Digital Library
15th Street News (Midwest City, Okla.), Vol. 36, No. 15, Ed. 1 Friday, February 2, 2007
Newspaper from Rose State College in Midwest City, Oklahoma that includes national, local, and campus news along with advertising.
Date:
February 2, 2007
Creator:
Ray, Johnna
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Adaptive Wavefront Calibration and Control for the Gemini Planet Imager
Quasi-static errors in the science leg and internal AO flexure will be corrected. Wavefront control will adapt to current atmospheric conditions through Fourier modal gain optimization, or the prediction of atmospheric layers with Kalman filtering.
Date:
February 2, 2007
Creator:
Poyneer, L A & Veran, J
Object Type:
Article
System:
The UNT Digital Library
adendum for )6 report
Prior to using human nasopharyngeal samples, we will use prepared mixtures of viruses with bacteria and eukaryotic cells in our research on microfluidic separation techniques. Some examples of these mixtures are the bacteriophage MS2 with its host bacteria, E. coli, and BSL-1, Risk-Group-1 virus such as fowlpox virus vaccine with its host cell, DF-1, derived from chickens.
Date:
February 2, 2007
Creator:
Mariella, R.; Borucki, M.; Miles, R.; Claugue, D.; Dougherty, G. & Fisher, K.
Object Type:
Report
System:
The UNT Digital Library