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[Gospel Night Live Photograph UNTA_AR0797-156-007-0003]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0100]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0055]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0009]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0023]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0005]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0025]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0089]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0061]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0058]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0032]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0006]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0082]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0031]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0030]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
[Gospel Night Live Photograph UNTA_AR0797-156-007-0010]
Photograph taken at the Gospel Night Live event, sponsored by The Black Academy of Arts and Letters in Dallas, Texas.
Date:
October 4, 2010
Creator:
Vinson, Bradley
Object Type:
Photograph
System:
The UNT Digital Library
High-throughput Accurate-wavelength Lens-based Visible Spectrometera
A scanning visible spectrometer has been prototyped to complement fixed-wavelength transmission grating spectrometers for charge exchange recombination spectroscopy. Fast f/1.8 200 mm commercial lenses are used with a large 2160 mm-1 grating for high throughput. A stepping-motor controlled sine drive positions the grating, which is mounted on a precision rotary table. A high-resolution optical encoder on the grating stage allows the grating angle to be measured with an absolute accuracy of 0.075 arcsec, corresponding to a wavelength error ≤ 0.005 Å. At this precision, changes in grating groove density due to thermal expansion and variations in the refractive index of air are important. An automated calibration procedure determines all relevant spectrometer parameters to high accuracy. Changes in bulk grating temperature, atmospheric temperature and pressure are monitored between the time of calibration and the time of measurement to insure a persistent wavelength calibration
Date:
June 4, 2010
Creator:
Bell, Ronald E. & Scoti, Filippo
Object Type:
Article
System:
The UNT Digital Library
Evaluation of Reagent Emplacement Techniques for Phosphate-based Treatment of the Uranium Contamination Source in the 300 Area White Paper
Persistent uranium contamination of groundwater under the 300 Area of the Hanford Site has been observed. The source of the uranium contamination resides in uranium deposits on sediments at the groundwater interface, and the contamination is mobilized when periodically wetted by fluctuations of Columbia River levels. Treatability work is ongoing to develop and apply phosphate-containing reagents to promote the formation of stable and insoluble uranium phosphate minerals (i.e., autunite) and other phosphate precipitates (di-calcium phosphate, apatite) to stabilize the uranium source. Technologies for applying phosphate-containing reagents by vertical percolation and lateral injection into sediments of the periodically wetted groundwater interface are being investigated. This report is a preliminary evaluation of technologies for lateral injection.
Date:
June 4, 2010
Creator:
Nimmons, Michael J.
Object Type:
Report
System:
The UNT Digital Library
Telescope Guiding with a HyViSI H2RG Used in Guide Mode
We report on long exposure results obtained with a Teledyne HyViSI H2RG detector operating in guide mode. The sensor simultaneously obtained nearly seeing-limited data while also guiding the Kitt Peak 2.1 m telescope. Results from unguided and guided operation are presented and used to place lower limits on flux/fluence values for accurate centroid measurements. We also report on significant noise reduction obtained in recent laboratory measurements that should further improve guiding capability with higher magnitude stars.
Date:
June 4, 2010
Creator:
Simms, Lance M.; Figerb, Donald F.; Hanold, Brandon J.; Kahn, Steven M. & Gilmore, D.Kirk
Object Type:
Article
System:
The UNT Digital Library
The science case for 37Ar as a monitor for underground nuclear explosions
A new calculation of the production of 37Ar from nuclear explosion neutron interactions on 40Ca in a suite of common sub-surface materials (rock, etc) is presented. Even in mineral structures that are relatively low in Ca, the resulting 37Ar signature is large enough for detection in cases of venting or gaseous diffusion driven by barometric pumping. Field and laboratory detection strategies and projected sensitivities are presented.
Date:
June 4, 2010
Creator:
Haas, Derek A.; Orrell, John L.; Bowyer, Ted W.; McIntyre, Justin I.; Miley, Harry S.; Aalseth, Craig E. et al.
Object Type:
Report
System:
The UNT Digital Library
Diagnostics for Ion Beam Driven High Energy Density Physics Experiments
Intense beams of heavy ions are capable of heating volumetric samples of matter to high energy density. Experiments are performed on the resulting warm dense matter (WDM) at the NDCX-I ion beam accelerator. The 0.3 MeV, 30-mA K{sup +} beam from NDCX-I heats foil targets by combined longitudinal and transverse neutralized drift compression of the ion beam. Both the compressed and uncompressed parts of the NDCX-I beam heat targets. The exotic state of matter (WDM) in these experiments requires specialized diagnostic techniques. We have developed a target chamber and fielded target diagnostics including a fast multi-channel optical pyrometer, optical streak camera, laser Doppler-shift interferometer (VISAR), beam transmission diagnostics, and high-speed gated cameras. We also present plans and opportunities for diagnostic development and a new target chamber for NDCX-II.
Date:
January 4, 2010
Creator:
Bieniosek, F. M.; Henestroza, E.; Lidia, S. & Ni, P. A.
Object Type:
Article
System:
The UNT Digital Library
Prediction of epigenetically regulated genes in breast cancer cell lines
Methylation of CpG islands within the DNA promoter regions is one mechanism that leads to aberrant gene expression in cancer. In particular, the abnormal methylation of CpG islands may silence associated genes. Therefore, using high-throughput microarrays to measure CpG island methylation will lead to better understanding of tumor pathobiology and progression, while revealing potentially new biomarkers. We have examined a recently developed high-throughput technology for measuring genome-wide methylation patterns called mTACL. Here, we propose a computational pipeline for integrating gene expression and CpG island methylation profles to identify epigenetically regulated genes for a panel of 45 breast cancer cell lines, which is widely used in the Integrative Cancer Biology Program (ICBP). The pipeline (i) reduces the dimensionality of the methylation data, (ii) associates the reduced methylation data with gene expression data, and (iii) ranks methylation-expression associations according to their epigenetic regulation. Dimensionality reduction is performed in two steps: (i) methylation sites are grouped across the genome to identify regions of interest, and (ii) methylation profles are clustered within each region. Associations between the clustered methylation and the gene expression data sets generate candidate matches within a fxed neighborhood around each gene. Finally, the methylation-expression associations are ranked through a logistic …
Date:
May 4, 2010
Creator:
Loss, Leandro A; Sadanandam, Anguraj; Durinck, Steffen; Nautiyal, Shivani; Flaucher, Diane; Carlton, Victoria EH et al.
Object Type:
Article
System:
The UNT Digital Library
Argonne National Laboratory Site Environmental Report for Calendar Year 2009.
This report discusses the status and the accomplishments of the environmental protection program at Argonne National Laboratory for calendar year 2009. The status of Argonne environmental protection activities with respect to compliance with the various laws and regulations is discussed, along with the progress of environmental corrective actions and restoration projects. To evaluate the effects of Argonne operations on the environment, samples of environmental media collected on the site, at the site boundary, and off the Argonne site were analyzed and compared with applicable guidelines and standards. A variety of radionuclides were measured in air, surface water, on-site groundwater, and bottom sediment samples. In addition, chemical constituents in surface water, groundwater, and Argonne effluent water were analyzed. External penetrating radiation doses were measured, and the potential for radiation exposure to off-site population groups was estimated. Results are interpreted in terms of the origin of the radioactive and chemical substances (i.e., natural, Argonne, and other) and are compared with applicable environmental quality standards. A U.S. Department of Energy (DOE) dose calculation methodology, based on International Commission on Radiological Protection recommendations and the U.S. Environmental Protection Agency's (EPA) CAP-88 Version 3 (Clean Air Act Assessment Package-1988) computer code, was used in preparing …
Date:
August 4, 2010
Creator:
Golchert, N. W.; Davis, T. M. & Moos, L. P.
Object Type:
Report
System:
The UNT Digital Library
Thermal Performance of Radioactive Material Packages in Transport Configuration
Drum type packages are routinely used to transport radioactive material (RAM) in the U.S. Department of Energy (DOE) complex. These packages are designed to meet the federal regulations described in 10 CFR Part 71. The packages are transported in specially designed vehicles like Safe Secure Transport (SST) for safety and security. In the transport vehicles, the packages are placed close to each other to maximize the number of units in the vehicle. Since the RAM contents in the packagings produce decay heat, it is important that they are spaced sufficiently apart to prevent overheating of the containment vessel (CV) seals and the impact limiter to ensure the structural integrity of the package. This paper presents a simple methodology to assess thermal performance of a typical 9975 packaging in a transport configuration.
Date:
March 4, 2010
Creator:
Gupta, N.
Object Type:
Article
System:
The UNT Digital Library