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288 Matching Results
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Advanced Combustion
The activity reported in this presentation is to provide the mechanical and physical property information needed to allow rational design, development and/or choice of alloys, manufacturing approaches, and environmental exposure and component life models to enable oxy-fuel combustion boilers to operate at Ultra-Supercritical (up to 650{degrees}C & between 22-30 MPa) and/or Advanced Ultra-Supercritical conditions (760{degrees}C & 35 MPa).
Date:
March 11, 2013
Creator:
Holcomb, Gordon R.
Object Type:
Article
System:
The UNT Digital Library
Mask roughness induced LER control and mitigation: aberrations sensitivity study and alternate illumination scheme
Here we conduct a mask-roughness-induced line-edge-roughness (LER) aberrations sensitivity study both as a random distribution amongst the first 16 Fringe Zernikes (for overall aberration levels of 0.25, 0.50, and 0.75nm rms) as well as an individual aberrations sensitivity matrix over the first 37 Fringe Zernikes. Full 2D aerial image modeling for an imaging system with NA = 0.32 was done for both the 22-nm and 16-nm half-pitch nodes on a rough mask with a replicated surface roughness (RSR) of 100 pm and a correlation length of 32 nm at the nominal extreme-ultraviolet lithography (EUVL) wavelength of 13.5nm. As the ideal RSR value for commercialization of EUVL is 50 pm and under, and furthermore as has been shown elsewhere, a correlation length of 32 nm of roughness on the mask sits on the peak LER value for an NA = 0.32 imaging optic, these mask roughness values and consequently the aberration sensitivity study presented here, represent a worst-case scenario. The illumination conditions were chosen based on the possible candidates for the 22-nm and 16-nm half-pitch nodes, respectively. In the 22-nm case, a disk illumination setting of {sigma} = 0.50 was used, and for the 16-nm case, crosspole illumination with {sigma} = …
Date:
March 11, 2011
Creator:
McClinton, Brittany M. & Naulleau, Patrick P.
Object Type:
Article
System:
The UNT Digital Library
Comparative analysis of twelve Dothideomycete plant pathogens
The Dothideomycetes are one of the largest and most diverse groups of fungi. Many are plant pathogens and pose a serious threat to agricultural crops grown for biofuel, food or feed. Most Dothideomycetes have only a single host and related Dothideomycete species can have very diverse host plants. Twelve Dothideomycete genomes have currently been sequenced by the Joint Genome Institute and other sequencing centers. They can be accessed via Mycocosm which has tools for comparative analysis
Date:
March 11, 2011
Creator:
Ohm, Robin; Aerts, Andrea; Salamov, Asaf; Goodwin, Stephen B. & Grigoriev, Igor
Object Type:
Report
System:
The UNT Digital Library
82nd Texas Legislature, Regular Session, House Concurrent Resolution 70
Concurrent resolution introduced by the Texas House of Representatives and Senate recognizing February 28, 2011, as Texas Southern University Day at the State Capitol.
Date:
March 11, 2011
Creator:
Texas. Legislature. House of Representatives.
Object Type:
Legislative Document
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 33, No. 341, Ed. 1 Thursday, March 11, 2010
Free weekly newspaper that includes business and classified advertising.
Date:
March 11, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Houston, Tex.), Vol. 42, No. 71, Ed. 1 Friday, March 11, 2011
Free weekly newspaper that includes business and classified advertising.
Date:
March 11, 2011
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Arlington-Grand Prairie, Tex.), Vol. 33, No. 339, Ed. 1 Thursday, March 11, 2010
Free weekly newspaper that includes business and classified advertising.
Date:
March 11, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
The Greensheet (Fort Worth, Tex.), Vol. 33, No. 340, Ed. 1 Thursday, March 11, 2010
Free weekly newspaper that includes business and classified advertising.
Date:
March 11, 2010
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
DOE-EPSCOR SPONSORED PROJECT FINAL REPORT
Concern over the quality of environmental management and restoration has motivated the model development for predicting water and solute transport in the vadose zone. Soil hydraulic properties are required inputs to subsurface models of water flow and contaminant transport in the vadose zone. Computer models are now routinely used in research and management to predict the movement of water and solutes into and through the vadose zone of soils. Such models can be used successfully only if reliable estimates of the soil hydraulic parameters are available. The hydraulic parameters considered in this project consist of the saturated hydraulic conductivity and four parameters of the water retention curves. To quantify hydraulic parameters for heterogeneous soils is both difficult and time consuming. The overall objective of this project was to better quantify soil hydraulic parameters which are critical in predicting water flows and contaminant transport in the vadose zone through a comprehensive and quantitative study to predict heterogeneous soil hydraulic properties and the associated uncertainties. Systematic and quantitative consideration of the parametric heterogeneity and uncertainty can properly address and further reduce predictive uncertainty for contamination characterization and environmental restoration at DOE-managed sites. We conducted a comprehensive study to assess soil hydraulic parameter …
Date:
March 11, 2010
Creator:
Zhu, Jianting
Object Type:
Report
System:
The UNT Digital Library
Integrating the Molecular Machines of Mercury Detoxification into Host Cell Biology
Integrating the Molecular Machines of Mercury Detoxification into Host Cell Biology The bacterial mercury resistance (mer) operon, one of the most evolutionarily successful genetic loci in any defined organism, detoxifies organic and inorganic mercury compounds. Several major biotic processes in the global Hg(II) cycle are carried out by bacteria with this highly mobile detoxification locus that occurs in Gram negative and high and low GC Gram positive bacteria. The functions of many individual mer operon components are well described, so we aim to dissect the higher order interactions of the enzymes, transporters, and regulators of this paradigm metal metabolizing system with each other and with the larger metabolism of the host cell. Understanding how this ubiquitous detoxification system fits into the biology and ecology of its bacterial host is essential to guide interventions that support and enhance Hg remediation. Specifically, we will test the hypotheses that: (a) the organomercurial lyase, MerB, and the mercuric reductase, MerA, act synergistically together and with the membrane-bound Hg(II) transporters, MerT and MerC, to detoxify mercurials; (b) the interaction of the metalloregulator MerR with RNA polymerase (RNAP) and with its DNA binding site, MerO, modulates its metal response, and interaction with its antagonist, MerD, prevents …
Date:
March 11, 2010
Creator:
Summers, Anne O
Object Type:
Report
System:
The UNT Digital Library
Probing the isothermal (delta)->(alpha)' martensitic transformation in Pu-Ga with in situ x-ray diffraction
The time-temperature-transformation (TTT) curve for the {delta} {yields} {alpha}{prime} isothermal martensitic transformation in a Pu-1.9 at. % Ga alloy is peculiar because it is reported to have a double-C curve. Recent work suggests that an ambient temperature conditioning treatment enables the lower-C curve. However, the mechanisms responsible for the double-C are still not fully understood. When the {delta} {yields} {alpha}{prime} transformation is induced by pressure, an intermediate {gamma}{prime} phase is observed in some alloys. It has been suggested that transformation at upper-C temperatures may proceed via this intermediate phase, while lower-C transformation progresses directly from {delta} to {alpha}{prime}. To investigate the possibility of thermally induced transformation via the intermediate {gamma}{prime} phase, in situ x-ray diffraction at the Advanced Photon Source was performed. Using transmission x-ray diffraction, the {delta} {yields} {alpha}{prime} transformation was observed in samples as thin at 30 {micro}m as a function of time and temperature. The intermediate {gamma}{prime} phase was not observed at -120 C (upper-C curve) or -155 C (lower-C curve). Results indicate that the bulk of the {alpha}{prime} phase forms relatively rapidly at -120 C and -155 C.
Date:
March 11, 2010
Creator:
Jeffries, J. R.; Blobaum, K. M.; Schwartz, A. J.; Cynn, H.; Yang, W. & Evans, W. J.
Object Type:
Article
System:
The UNT Digital Library
Effects of Anisotropic Coherency Strains on Intercalation in Phase-Separating Crystals
None
Date:
March 11, 2010
Creator:
Stanton, L G & Bazant, M Z
Object Type:
Article
System:
The UNT Digital Library
NEAR INFRARED REFLECTANCE SPECTROSCOPY AS A PROCESS SIGNATURE IN URANIUM OXIDES
None
Date:
March 11, 2012
Creator:
Plaue, J W; Klunder, G L; Czerwinski, K R & Hutcheon, I D
Object Type:
Article
System:
The UNT Digital Library
Replicated mask surface roughness effects on EUV lithographic pattering and line edge roughness
To quantify the roughness contributions to speckle, a programmed roughness substrate was fabricated with a number of areas having different roughness magnitudes. The substrate was then multilayer coated. Atomic force microscopy (AFM) surface maps were collected before and after multilayer deposition. At-wavelength reflectance and total integrated scattering measurements were also completed. Angle resolved scattering based power spectral densities are directly compared to the AFM based power spectra. We show that AFM overpredicts the roughness in the picometer measurements range. The mask was then imaged at-wavelength for the direct characterization of the aerial image speckle using the SEMATECH Berkeley Actinic Inspection Tool (AIT). Modeling was used to test the effectiveness of the different metrologies in predicting the measured aerial-image speckle. AIT measured contrast values are 25% or more than the calculated image contrast values obtained using the measured rms roughness input. The extent to which the various metrologies can be utilized for specifying tolerable roughness limits on EUV masks is still to be determined. Further modeling and measurements are being planned.
Date:
March 11, 2011
Creator:
George, Simi A.; Naulleau, Patrick P.; Gullikson, Eric M.; Mochi, Iacopo; Salmassi, Farhad; Goldberg, Kenneth A. et al.
Object Type:
Article
System:
The UNT Digital Library
22X mask cleaning effects on EUV lithography process and lifetime
For this paper, we evaluated the impact of repetitive cleans on a photomask that was fabricated and patterned for extreme ultraviolet lithography exposure. The lithographic performance of the cleaned mask, in terms of process window and line edge roughness, was monitored with the SEMATECH Berkeley micro-exposure tool (MET). Each process measurement of the cleaned mask was compared to a reference mask with the same mask architecture. Both masks were imaged on the same day in order to eliminate any process-related measurement uncertainties. The cleaned mask was periodically monitored with atomic force microscopy (AFM) measurements and pattern widths were monitored using scanning electron microscopy (SEM). In addition, reflectivity changes were also tracked with the aid of witness plate measurements. At the conclusion of this study, the mask under evaluation was cleaned 22 times; with none of the evaluation techniques showing any significant degradation in performance.
Date:
March 11, 2011
Creator:
George, Simi A.; Chen, Robert J.; Baclea-an, Lorie Mae & Naulleau, Patrick P.
Object Type:
Article
System:
The UNT Digital Library
Magnetic Profiles in Ferromagnetic/Superconducting Superlattices.
Throughout the past decade, frequent discussions and debates have centered on the geological sequestration of carbon dioxide (CO{sub 2}). For sequestration to have a reasonably positive impact on atmospheric carbon levels, the anticipated volume of CO{sub 2} that would need to be injected is very large (many millions of tons per year). Many stakeholders have expressed concern about elevated formation pressure following the extended injection of CO{sub 2}. The injected CO{sub 2} plume could potentially extend for many kilometers from the injection well. If not properly managed and monitored, the increased formation pressure could stimulate new fractures or enlarge existing natural cracks or faults, so the CO{sub 2} or the brine pushed ahead of the plume could migrate vertically. One possible tool for management of formation pressure would be to extract water already residing in the formation where CO{sub 2} is being stored. The concept is that by removing water from the receiving formations (referred to as 'extracted water' to distinguish it from 'oil and gas produced water'), the pressure gradients caused by injection could be reduced, and additional pore space could be freed up to sequester CO{sub 2}. Such water extraction would occur away from the CO{sub 2} plume …
Date:
March 11, 2011
Creator:
Harto, C. B. & Veil, J. A. (Environmental Science Division)
Object Type:
Report
System:
The UNT Digital Library
Sequencing the Black Aspergilli species complex
The ~15 members of the Aspergillus section Nigri species complex (the "Black Aspergilli") are significant as platforms for bioenergy and bioindustrial technology, as members of soil microbial communities and players in the global carbon cycle, and as food processing and spoilage agents and agricultural toxigens. Despite their utility and ubiquity, the morphological and metabolic distinctiveness of the complex's members, and thus their taxonomy, is poorly defined. We are using short read pyrosequencing technology (Roche/454 and Illumina/Solexa) to rapidly scale up genomic and transcriptomic analysis of this species complex. To date we predict 11197 genes in Aspergillus niger, 11624 genes in A. carbonarius, and 10845 genes in A. aculeatus. A. aculeatus is our most recent genome, and was assembled primarily from 454-sequenced reads and annotated with the aid of >2 million 454 ESTs and >300 million Solexa ESTs. To most effectively deploy these very large numbers of ESTs we developed 2 novel methods for clustering the ESTs into assemblies. We have also developed a pipeline to propose orthologies and paralogies among genes in the species complex. In the near future we will apply these methods to additional species of Black Aspergilli that are currently in our sequencing pipeline.
Date:
March 11, 2011
Creator:
Kuo, Alan; Salamov, Asaf; Zhou, Kemin; Otillar, Robert; Baker, Scott & Grigoriev, Igor
Object Type:
Report
System:
The UNT Digital Library
Cyber Science and Security - An R&D Partnership at LLNL
Lawrence Livermore National Laboratory has established a mechanism for partnership that integrates the high-performance computing capabilities of the National Labs, the network and cyber technology expertise of leading information technology companies, and the long-term research vision of leading academic cyber programs. The Cyber Science and Security Center is designed to be a working partnership among Laboratory, Industrial, and Academic institutions, and provides all three with a shared R&D environment, technical information sharing, sophisticated high-performance computing facilities, and data resources for the partner institutions and sponsors. The CSSC model is an institution where partner organizations can work singly or in groups on the most pressing problems of cyber security, where shared vision and mutual leveraging of expertise and facilities can produce results and tools at the cutting edge of cyber science.
Date:
March 11, 2011
Creator:
Brase, J & Henson, V
Object Type:
Report
System:
The UNT Digital Library
Nigeria: Current Issues and U.S. Policy
This report discusses Nigeria's relationship with the U.S. The Obama Administration has been supportive of reform initiatives in Nigeria, including anti-corruption efforts, economic and electoral reforms, energy sector privatization, and programs to promote peace and development in the Niger Delta. Congress oversees more than $600 million in U.S. foreign aid programs in Nigeria--one of the largest U.S. bilateral assistance packages in Africa.
Date:
March 11, 2016
Creator:
Ploch Blanchard, Lauren & Husted, Tomas F.
Object Type:
Report
System:
The UNT Digital Library
Consumer Operated and Oriented Plan (CO-OP) Program: Frequently Asked Questions
This report addresses frequently asked questions regarding the Consumer Operated and Oriented Plan (CO-OP) program, which was established under the Patient Protection and Affordable Care Act and aims to foster the creation of CO-OPs--nonprofit, member-run health insurance issuers that sell health plans in states in which they are licensed.
Date:
March 11, 2016
Creator:
Mach, Annie L.
Object Type:
Report
System:
The UNT Digital Library
Veterans' Benefits: Burial Benefits and National Cemeteries
This report provides a descriptive analysis of both nonmonetary and monetary burial benefits and national cemeteries. It addresses congressional and constituent issues.
Date:
March 11, 2016
Creator:
Szymendera, Scott D.
Object Type:
Report
System:
The UNT Digital Library
[TXSSAR Arlington Chapter member Jerry Cope]
Photograph of TXSSAR Arlington Chapter member Jerry Cope seen wearing an American Patriots uniform during a TXSSAR meeting on March 11, 2017.
Date:
March 11, 2017
Creator:
Texas Society Sons of the American Revolution, Arlington Chapter 7
Object Type:
Photograph
System:
The UNT Digital Library
[TXSSAR Arlington Chapter Member Gary Faletti]
Photograph of TXSSAR Arlington Chapter member Gary Faletti standing up and addressing his fellow chapter members. Faletti was photographed in a restaurant where the chapter members where holding their meeting on March 11, 2017.
Date:
March 11, 2017
Creator:
Texas Society Sons of the American Revolution, Arlington Chapter 7
Object Type:
Photograph
System:
The UNT Digital Library
The Gilmer Mirror (Gilmer, Tex.), Vol. 138, No. 20, Ed. 1 Wednesday, March 11, 2015
Semi-weekly newspaper from Gilmer, Texas that includes local, state and national news along with advertising.
Date:
March 11, 2015
Creator:
Parker, Vic
Object Type:
Newspaper
System:
The Portal to Texas History