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Anomalies and Discrete Chiral Symmetries
The quantum anomaly that breaks the U(1) axial symmetry of massless multi-flavored QCD leaves behind a discrete flavor-singlet chiral invariance. With massive quarks, this residual symmetry has a close connection with the strong CP-violating parameter theta. One result is that if the lightest quarks are degenerate, then a first order transition will occur when theta passes through pi. The resulting framework helps clarify when the rooting prescription for extrapolating in the number of flavors is valid.
Date:
September 7, 2009
Creator:
Creutz, M.
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 89, No. 250, Ed. 1 Monday, September 7, 2009
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
September 7, 2009
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
Deposit Summary
Deposit summary of $145.00 made on September 8, 2009.
Date:
September 7, 2009
Creator:
unknown
Object Type:
Text
System:
The UNT Digital Library
[Letter from W. Hanes Lancaster, Jr. to Betty Jo Reed, Sept. 7, 2009]
Letter from W. Hanes Lancaster, Jr. to Betty Jo Reed discussing an enclosed donation and a story about his experience with WASP in the war.
Date:
September 7, 2009
Creator:
Lancaster, W. Hanes
Object Type:
Letter
System:
The Portal to Texas History
Materials Science and Physics at Micro/Nano-Scales. FINAL REPORT
The scope of this project is to study nanostructures of semiconductors and superconductors, which have been regarded as promising building blocks for nanoelectronic and nanoelectric devices. The emphasis of this project is on developing novel synthesis approaches for fabrication of nanostructures with desired physical properties. The ultimate goal is to achieve a full control of the nanostructure growth at microscopic scales. The major experimental achievements obtained are summarized
Date:
September 7, 2009
Creator:
Wu, Judy Z.
Object Type:
Report
System:
The UNT Digital Library
Microfield exposure tool enables advances in EUV lithography development
With demonstrated resist resolution of 20 nm half pitch, the SEMATECH Berkeley BUV microfield exposure tool continues to push crucial advances in the areas of BUY resists and masks. The ever progressing shrink in computer chip feature sizes has been fueled over the years by a continual reduction in the wavelength of light used to pattern the chips. Recently, this trend has been threatened by unavailability of lens materials suitable for wavelengths shorter than 193 nm. To circumvent this roadblock, a reflective technology utilizing a significantly shorter extreme ultraviolet (EUV) wavelength (13.5 nm) has been under development for the past decade. The dramatic wavelength shrink was required to compensate for optical design limitations intrinsic in mirror-based systems compared to refractive lens systems. With this significant reduction in wavelength comes a variety of new challenges including developing sources of adequate power, photoresists with suitable resolution, sensitivity, and line-edge roughness characteristics, as well as the fabrication of reflection masks with zero defects. While source development can proceed in the absence of available exposure tools, in order for progress to be made in the areas of resists and masks it is crucial to have access to advanced exposure tools with resolutions equal to …
Date:
September 7, 2009
Creator:
Naulleau, Patrick
Object Type:
Article
System:
The UNT Digital Library
Proton Polarimetry at the Relativistic Heavy Ion Collider
The RHIC polarized proton collider employs polarimeters in each of the Blue and Yellow rings that utilize the analyzing power in p-Carbon elastic scattering in the Coulomb Nuclear Interference region to measure the absolute beam polarization. These are calibrated by the polarized Hydrogen Jet Target that measures the absolute beam polarization in pp elastic scattering in the CNI region. This paper describes the status and performance of these polarimeters in the FY09 run which included both a 250 GeV/c and 100 GeV/c physics data taking periods. We will describe some of the difficulties encountered and the efforts underway to improve the performance in better energy resolution, rate handling capability, and reduced systematic uncertainties.
Date:
September 7, 2009
Creator:
Makdisi, Y.; Aschenauer, E.; Atoian, G.; Bazilevsky, A.; Bunce, G.; Gill, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Radiosensitivity profiles from a panel of ovarian cancer cell lines exhibiting genetic alterations in p53 and disparate DNA-dependent protein kinase activities
The variability of radiation responses in ovarian tumors and tumor-derived cell lines is poorly understood. Since both DNA repair capacity and p53 status can significantly alter radiation sensitivity, we evaluated these factors along with radiation sensitivity in a panel of sporadic human ovarian carcinoma cell lines. We observed a gradation of radiation sensitivity among these sixteen lines, with a five-fold difference in the LD50 between the most radiosensitive and the most radioresistant cells. The DNA-dependent protein kinase (DNA-PK) is essential for the repair of radiation induced DNA double-strand breaks in human somatic cells. Therefore, we measured gene copy number, expression levels, protein abundance, genomic copy and kinase activity for DNA-PK in all of our cell lines. While there were detectable differences in DNA-PK between the cell lines, there was no clear correlation with any of these differences and radiation sensitivity. In contrast, p53 function as determined by two independent methods, correlated well with radiation sensitivity, indicating p53 mutant ovarian cancer cells are typically radioresistant relative to p53 wild-type lines. These data suggest that the activity of regulatory molecules such as p53 may be better indicators of radiation sensitivity than DNA repair enzymes such as DNAPK in ovarian cancer.
Date:
September 7, 2009
Creator:
Langland, Gregory T.; Yannone, Steven M.; Langland, Rachel A.; Nakao, Aki; Guan, Yinghui; Long, Sydney B.T. et al.
Object Type:
Article
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 110, No. 30, Ed. 1 Sunday, September 7, 2008
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 7, 2008
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
A Automated Tool for Supporting FMEAs of Digital Systems
Although designs of digital systems can be very different from each other, they typically use many of the same types of generic digital components. Determining the impacts of the failure modes of these generic components on a digital system can be used to support development of a reliability model of the system. A novel approach was proposed for such a purpose by decomposing the system into a level of the generic digital components and propagating failure modes to the system level, which generally is time-consuming and difficult to implement. To overcome the associated issues of implementing the proposed FMEA approach, an automated tool for a digital feedwater control system (DFWCS) has been developed in this study. The automated FMEA tool is in nature a simulation platform developed by using or recreating the original source code of the different module software interfaced by input and output variables that represent physical signals exchanged between modules, the system, and the controlled process. For any given failure mode, its impacts on associated signals are determined first and the variables that correspond to these signals are modified accordingly by the simulation. Criteria are also developed, as part of the simulation platform, to determine whether the …
Date:
September 7, 2008
Creator:
Yue, M.; Chu, T. L.; Martinez-Guridi, G. & Lehner, J.
Object Type:
Article
System:
The UNT Digital Library
The Baytown Sun (Baytown, Tex.), Vol. 88, No. 251, Ed. 1 Sunday, September 7, 2008
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
September 7, 2008
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Express-Star (Chickasha, Okla.), Ed. 1 Sunday, September 7, 2008
Daily newspaper from Chickasha, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 7, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Message, Volume 44, Number 2, September 2008
Newsletter of Congregation Beth Yeshurun in Houston, including news and events, upcoming services, member announcements, editorials, and other information of interest to congregants.
Date:
September 7, 2008
Creator:
Congregation Beth Yeshurun (Houston, Tex.)
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
The Panola Watchman (Carthage, Tex.), Vol. 136, No. 72, Ed. 1 Sunday, September 7, 2008
Semiweekly newspaper from Carthage, Texas that includes local, state, and national news along with advertising.
Date:
September 7, 2008
Creator:
unknown
Object Type:
Newspaper
System:
The Portal to Texas History
Polk County Enterprise (Livingston, Tex.), Vol. 126, No. 74, Ed. 1 Sunday, September 7, 2008
Semi-weekly newspaper from Livingston, Texas that includes local, state and national news along with advertising.
Date:
September 7, 2008
Creator:
Reddell, Valerie
Object Type:
Newspaper
System:
The Portal to Texas History
A renaissance for the pioneering 16S rRNA gene
Culture-independent molecular surveys using the 16S rRNA gene have become a mainstay for characterizing microbial community structure over the last quarter century. More recently this approach has been overshadowed by metagenomics, which provides a global overview of a community's functional potential rather than just an inventory of its inhabitants. However, the pioneering 16S rRNA gene is making a comeback in its own right thanks to a number of methodological advancements including higher resolution (more sequences), analysis of multiple related samples (e.g. spatial and temporal series) and improved metadata and use of metadata. The standard conclusion that microbial ecosystems are remarkably complex and diverse is now being replaced by detailed insights into microbial ecology and evolution based only on this one historically important marker gene.
Date:
September 7, 2008
Creator:
Tringe, Susannah & Hugenholtz, Philip
Object Type:
Article
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 93, No. 254, Ed. 1 Sunday, September 7, 2008
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 7, 2008
Creator:
Shance, Brenda
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Seminole Sentinel (Seminole, Tex.), Vol. 99, No. 96, Ed. 1 Sunday, September 7, 2008
Semiweekly newspaper from Seminole, Texas that includes local, state, and national news along with extensive advertising.
Date:
September 7, 2008
Creator:
Wright, Dustin
Object Type:
Newspaper
System:
The Portal to Texas History
Strongly Interacting Matter at High Energy Density
This lecture concerns the properties of strongly interacting matter (which is described by Quantum Chromodynamics) at very high energy density. I review the properties of matter at high temperature, discussing the deconfinement phase transition. At high baryon density and low temperature, large N{sub c} arguments are developed which suggest that high baryonic density matter is a third form of matter, Quarkyonic Matter, that is distinct from confined hadronic matter and deconfined matter. I finally discuss the Color Glass Condensate which controls the high energy limit of QCD, and forms the low x part of a hadron wavefunction. The Glasma is introduced as matter formed by the Color Glass Condensate which eventually thermalizes into a Quark Gluon Plasma.
Date:
September 7, 2008
Creator:
McLerran, L.
Object Type:
Article
System:
The UNT Digital Library
Alternative Energy Center, Final Scientific/Technical Report
The Lansing Community College Alternative Energy Center was created with several purposes in mind. The first purpose was the development of educational curricula designed to meet the growing needs of advanced energy companies that would allow students to articulate to other educational institutions or enter this growing workforce. A second purpose was the professional development of faculty and teachers to prepare them to train tomorrow's workforce and scholars. Still another purpose was to design, construct, and equip an alternative energy laboratory that could be used for education, demonstration, and public outreach. Last, the Center was to engage in community outreach and education to enhance industry partnerships, inform decision makers, and increase awareness and general knowledge of hydrogen and other alternative energy technologies and their beneficial impacts on society. This project has enabled us to accomplish all of our goals, including greater faculty understanding of advanced energy concepts, who are now able to convey this knowledge to students through a comprehensive alternative energy curriculum, in a facility well-equipped with advanced technologies, which is also being used to better educate the public on the advantages to society of exploring alternative energy technologies.
Date:
September 7, 2007
Creator:
Dillman, Howard D. & Marshall, JaNice C.
Object Type:
Report
System:
The UNT Digital Library
The Altus Times (Altus, Okla.), Vol. 109, No. 84, Ed. 1 Friday, September 7, 2007
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
September 7, 2007
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 283, Ed. 1 Friday, September 7, 2007
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
September 7, 2007
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History
The Boerne Star & Recorder (Boerne, Tex.), Vol. 101, No. 72, Ed. 1 Friday, September 7, 2007
Semiweekly newspaper from Boerne, Texas that includes local, state, and national news along with advertising.
Date:
September 7, 2007
Creator:
Cartwright, Brian
Object Type:
Newspaper
System:
The Portal to Texas History
Canada’s WTO Case Against U.S. Aggregate Measure of Support (AMS)
This report provides background on both the U.S. and Canadian corn sectors as well as the historical development of their corn trade dispute.In addition, it discusses the potential implications of the case for U.S. farm policy.
Date:
September 7, 2007
Creator:
Schnepf, Randy
Object Type:
Report
System:
The UNT Digital Library