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8 GeV beam line optics optimization for the rapid antiproton transfers at Fermilab
Tevatron Run-II upgrade requires a significant increase of the efficiency and speed of the antiproton transfers from the Accumulator to the Recycler. The goal for the total transfer time is challenging a reduction from 1 hour down to a few minutes. Here we discuss the beam line optics aspects of this project. Results of lattice measurements and optimization are analyzed in terms of transport efficiency and stability.
Date:
February 1, 2007
Creator:
Nagaslaev, V.; Lebedev, V.; Morgan, J. & Vander Meulen, D.
Object Type:
Article
System:
The UNT Digital Library
2006 Data Report: Groundwater Monitoring Program Area 5 Radioactive Waste Management Site
This report is a compilation of the groundwater sampling results from the Area 5 Radioactive Waste Management Site (RWMS) for calendar year 2006. Pilot wells UE5PW-1, UE5PW-2, and UE5PW-3 were sampled in April and October 2006 for the following indicators of contamination: pH, specific conductance, total organic carbon, total organic halides, and tritium. Indicators of general water chemistry (cations and anions) were also monitored. Results from all samples collected in 2006 were within the limits established by agreement with the Nevada Division of Environmental Protection for each analyte. These data indicate that there has been no measurable impact to the uppermost aquifer from the Area 5 RWMS. There were no significant changes in measured groundwater parameters compared to previous years. Other information in the report includes an updated Cumulative Chronology for the Area 5 RWMS Groundwater Monitoring Program and a brief description of the site hydrogeology.
Date:
February 1, 2007
Creator:
Hudson, David B.
Object Type:
Report
System:
The UNT Digital Library
3D optical sectioning with a new hyperspectral confocal fluorescence imaging system.
A novel hyperspectral fluorescence microscope for high-resolution 3D optical sectioning of cells and other structures has been designed, constructed, and used to investigate a number of different problems. We have significantly extended new multivariate curve resolution (MCR) data analysis methods to deconvolve the hyperspectral image data and to rapidly extract quantitative 3D concentration distribution maps of all emitting species. The imaging system has many advantages over current confocal imaging systems including simultaneous monitoring of numerous highly overlapped fluorophores, immunity to autofluorescence or impurity fluorescence, enhanced sensitivity, and dramatically improved accuracy, reliability, and dynamic range. Efficient data compression in the spectral dimension has allowed personal computers to perform quantitative analysis of hyperspectral images of large size without loss of image quality. We have also developed and tested software to perform analysis of time resolved hyperspectral images using trilinear multivariate analysis methods. The new imaging system is an enabling technology for numerous applications including (1) 3D composition mapping analysis of multicomponent processes occurring during host-pathogen interactions, (2) monitoring microfluidic processes, (3) imaging of molecular motors and (4) understanding photosynthetic processes in wild type and mutant Synechocystis cyanobacteria.
Date:
February 1, 2007
Creator:
Nieman, Linda T.; Sinclair, Michael B.; Davidson, George S.; Van Benthem, Mark Hilary; Haaland, David Michael; Timlin, Jerilyn Ann et al.
Object Type:
Report
System:
The UNT Digital Library
80th Texas Legislature, Regular Session, Senate Concurrent Resolution 13
Concurrent resolution introduced by the Texas Senate and House of Representatives inviting the Chief Justice of the Supreme Court of Texas to address a Joint Session of the legislature on February 20, 2007.
Date:
February 1, 2007
Creator:
Texas. Legislature. Senate.
Object Type:
Legislative Document
System:
The Portal to Texas History
ACRF Instrumentation Status: New, Current, and Future February 2007
The purpose of this report is to provide a concise but comprehensive overview of Atmospheric Radiation Measurement Program Climate Research Facility instrumentation status. The report is divided into four sections: (1) new instrumentation in the process of being acquired and deployed, (2) existing instrumentation and progress on improvements or upgrades, (3) proposed future instrumentation, and (4) Small Business Innovation Research instrument development
Date:
February 1, 2007
Creator:
Liljegren, J. C.
Object Type:
Report
System:
The UNT Digital Library
Adaptive optics ophthalmologic systems using dual deformable mirrors
Adaptive Optics (AO) have been increasingly combined with a variety of ophthalmic instruments over the last decade to provide cellular-level, in-vivo images of the eye. The use of MEMS deformable mirrors in these instruments has recently been demonstrated to reduce system size and cost while improving performance. However, currently available MEMS mirrors lack the required range of motion for correcting large ocular aberrations, such as defocus and astigmatism. In order to address this problem, we have developed an AO system architecture that uses two deformable mirrors, in a woofer/tweeter arrangement, with a bimorph mirror as the woofer and a MEMS mirror as the tweeter. This setup provides several advantages, including extended aberration correction range, due to the large stroke of the bimorph mirror, high order aberration correction using the MEMS mirror, and additionally, the ability to ''focus'' through the retina. This AO system architecture is currently being used in four instruments, including an Optical Coherence Tomography (OCT) system and a retinal flood-illuminated imaging system at the UC Davis Medical Center, a Scanning Laser Ophthalmoscope (SLO) at the Doheny Eye Institute, and an OCT system at Indiana University. The design, operation and evaluation of this type of AO system architecture will …
Date:
February 1, 2007
Creator:
Jones, S.; Olivier, S.; Chen, D.; Sadda, S.; Joeres, S.; Zawadzki, R. et al.
Object Type:
Article
System:
The UNT Digital Library
Advanced Gasification Mercury/Trace Metal Control with Monolith Traps
Three potential additives for controlling mercury emissions from syngas at temperatures ranging from 350 to 500 F (177 to 260 C) were developed. Current efforts are being directed at increasing the effective working temperature for these sorbents and also being able to either eliminate any potential mercury desorption or trying to engineer a trace metal removal system that can utilize the observed desorption process to repeatedly regenerate the same sorbent monolith for extended use. Project results also indicate that one of these same sorbents can also successfully be utilized for arsenic removal. Capture of the hydrogen selenide in the passivated tubing at elevated temperatures has resulted in limited results on the effective control of hydrogen selenide with these current sorbents, although lower-temperature results are promising. Preliminary economic analysis suggests that these Corning monoliths potentially could be more cost-effective than the conventional cold-gas (presulfided activated carbon beds) technology currently being utilized. Recent Hg-loading results might suggest that the annualized costs might be as high as 2.5 times the cost of the conventional technology. However, this annualized cost does not take into account the significantly improved thermal efficiency of any plant utilizing the warm-gas monolith technology currently being developed.
Date:
February 1, 2007
Creator:
Swanson, Michael L.; Dunham, Grant E. & Musich, Mark A.
Object Type:
Report
System:
The UNT Digital Library
Advanced Vadose Zone Simulations Using TOUGH
The vadose zone can be characterized as a complex subsurfacesystem in which intricate physical and biogeochemical processes occur inresponse to a variety of natural forcings and human activities. Thismakes it difficult to describe, understand, and predict the behavior ofthis specific subsurface system. The TOUGH nonisothermal multiphase flowsimulators are well-suited to perform advanced vadose zone studies. Theconceptual models underlying the TOUGH simulators are capable ofrepresenting features specific to the vadose zone, and of addressing avariety of coupled phenomena. Moreover, the simulators are integratedinto software tools that enable advanced data analysis, optimization, andsystem-level modeling. We discuss fundamental and computationalchallenges in simulating vadose zone processes, review recent advances inmodeling such systems, and demonstrate some capabilities of the TOUGHsuite of codes using illustrative examples.
Date:
February 1, 2007
Creator:
Finsterle, S.; Doughty, C.; Kowalsky, M.B.; Moridis, G.J.; Pan,L.; Xu, T. et al.
Object Type:
Article
System:
The UNT Digital Library
The Albany News (Albany, Tex.), Vol. 131, No. 35, Ed. 1 Thursday, February 1, 2007
Weekly newspaper from Albany, Texas that includes local, county, and state news along with extensive advertising.
Date:
February 1, 2007
Creator:
Lucas, Melinda L.
Object Type:
Newspaper
System:
The Portal to Texas History
The Altus Times (Altus, Okla.), Vol. 108, No. 264, Ed. 1 Thursday, February 1, 2007
Daily newspaper from Altus, Oklahoma that includes local, state, and national news along with advertising.
Date:
February 1, 2007
Creator:
Bush, Michael
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Angular Signatures of Dark Matter in the Diffuse Gamma Ray Spectrum
Dark matter annihilating in our Galaxy's halo and elsewhere in the universe is expected to generate a diffuse flux of gamma rays, potentially observable with next generation satellite-based experiments, such as GLAST. In this article, we study the signatures of dark matter in the angular distribution of this radiation. Pertaining to the extragalactic contribution, we discuss the effect of the motion of the solar system with respect to the cosmological rest frame, and anisotropies due to the structure of our local universe. For the gamma ray flux from dark matter in our own Galactic halo, we discuss the effects of the offset position of the solar system, the Compton-Getting effect, the asphericity of the Milky Way halo, and the signatures of nearby substructure. We explore the prospects for the detection of these features by the GLAST satellite and find that, if {approx} 10% or more of the diffuse gamma ray background observed by EGRET is the result of dark matter annihilations, then GLAST should be sensitive to anisotropies down to the 0.1% level. Such precision would be sufficient to detect many, if not all, of the signatures discussed in this paper.
Date:
February 1, 2007
Creator:
Hooper, Dan & Serpico, Pasquale D.
Object Type:
Article
System:
The UNT Digital Library
Annual Birding & Nature Festivals of Texas: 2007-2008
Annual guide listing festivals in the state of Texas that are related to birds or other wildlife, providing descriptions, dates, and contact information.
Date:
February 2007
Creator:
Texas. Parks and Wildlife Department.
Object Type:
Pamphlet
System:
The Portal to Texas History
Archer County Advocate (Holliday, Tex.), Vol. 4, No. 43, Ed. 1 Thursday, February 1, 2007
Weekly newspaper from Holliday, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 2007
Creator:
Stevens, Charlotte
Object Type:
Newspaper
System:
The Portal to Texas History
Archer County News (Archer City, Tex.), No. 5, Ed. 1 Thursday, February 1, 2007
Weekly newspaper from Archer City, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 2007
Creator:
Lewis, Shelley
Object Type:
Newspaper
System:
The Portal to Texas History
Armenia, Azerbaijan, and Georgia: Security Issues and Implications for U.S. Interests
This report describes the internal and external security issues of the South Caucasus states, Armenia, Azerbaijan, and Georgia.
Date:
February 1, 2007
Creator:
Nichol, Jim
Object Type:
Report
System:
The UNT Digital Library
An array of low-background 3He proportional counters for theSudbury Neutrino Observatory
An array of Neutral-Current Detectors (NCDs) has been builtin order to make a unique measurement of the total active ux of solarneutrinos in the Sudbury Neutrino Observatory (SNO). Data in the thirdphase of the SNO experiment were collected between November 2004 andNovember 2006, after the NCD array was added to improve theneutral-current sensitivity of the SNO detector. This array consisted of36 strings of proportional counters lled with a mixture of 3He and CF4gas capable of detecting the neutrons liberated by the neutrino-deuteronneutral current reaction in the D2O, and four strings lled with a mixtureof 4He and CF4 gas for background measurements. The proportional counterdiameter is 5 cm. The total deployed array length was 398 m. The SNO NCDarray is the lowest-radioactivity large array of proportional countersever produced. This article describes the design, construction,deployment, and characterization of the NCD array, discusses theelectronics and data acquisition system, and considers event signaturesand backgrounds.
Date:
February 1, 2007
Creator:
Amsbaugh, J. F.; Anaya, J. M.; Banar, J.; Bowles, T. J.; Browne, M. C.; Bullard, T. V. et al.
Object Type:
Article
System:
The UNT Digital Library
Arrow Lakes Reservoir Fertilization Experiment, Technical Report 1999-2004.
The Arrow Lakes food web has been influenced by several anthropogenic stressors during the past 45 years. These include the introduction of mysid shrimp (Mysis relicta) in 1968 and 1974 and the construction of large hydroelectric impoundments in 1969, 1973 and 1983. The construction of the impoundments affected the fish stocks in Upper and Lower Arrow lakes in several ways. The construction of Hugh Keenleyside Dam (1969) resulted in flooding that eliminated an estimated 30% of the available kokanee spawning habitat in Lower Arrow tributaries and at least 20% of spawning habitat in Upper Arrow tributaries. The Mica Dam (1973) contributed to water level fluctuations and blocked upstream migration of all fish species including kokanee. The Revelstoke Dam (1983) flooded 150 km of the mainstem Columbia River and 80 km of tributary streams which were used by kokanee, bull trout, rainbow trout and other species. The construction of upstream dams also resulted in nutrient retention which ultimately reduced reservoir productivity. In Arrow Lakes Reservoir (ALR), nutrients settled out in the Revelstoke and Mica reservoirs, resulting in decreased productivity, a process known as oligotrophication. Kokanee are typically the first species to respond to oligotrophication resulting from aging impoundments. To address the …
Date:
February 1, 2007
Creator:
Schindler, E.
Object Type:
Report
System:
The UNT Digital Library
Arrow Lakes Reservoir Fertilization Experiment; Years 4 and 5, Technical Report 2002-2003.
This report presents the fourth and fifth year (2002 and 2003, respectively) of a five-year fertilization experiment on the Arrow Lakes Reservoir. The goal of the experiment was to increase kokanee populations impacted from hydroelectric development on the Arrow Lakes Reservoir. The impacts resulted in declining stocks of kokanee, a native land-locked sockeye salmon (Oncorhynchus nerka), a key species of the ecosystem. Arrow Lakes Reservoir, located in southeastern British Columbia, has undergone experimental fertilization since 1999. It is modeled after the successful Kootenay Lake fertilization experiment. The amount of fertilizer added in 2002 and 2003 was similar to the previous three years. Phosphorus loading from fertilizer was 52.8 metric tons and nitrogen loading from fertilizer was 268 metric tons. As in previous years, fertilizer additions occurred between the end of April and the beginning of September. Surface temperatures were generally warmer in 2003 than in 2002 in the Arrow Lakes Reservoir from May to September. Local tributary flows to Arrow Lakes Reservoir in 2002 and 2003 were generally less than average, however not as low as had occurred in 2001. Water chemistry parameters in select rivers and streams were similar to previous years results, except for dissolved inorganic nitrogen (DIN) …
Date:
February 1, 2007
Creator:
Schindler, E.
Object Type:
Report
System:
The UNT Digital Library
Atmospheric Neutrino Induced Muons in the MINOS Far Detector
The Main Injector Neutrino Oscillation Search (MINOS) is a long baseline neutrino oscillation experiment. The MINOS Far Detector, located in the Soudan Underground Laboratory in Soudan MN, has been collecting data since August 2003. The scope of this dissertation involves identifying the atmospheric neutrino induced muons that are created by the neutrinos interacting with the rock surrounding the detector cavern, performing a neutrino oscillation search by measuring the oscillation parameter values of {Delta}m{sub 23}{sup 2} and sin{sup 2} 2{theta}{sub 23}, and searching for CPT violation by measuring the charge ratio for the atmospheric neutrino induced muons. A series of selection cuts are applied to the data set in order to extract the neutrino induced muons. As a result, a total of 148 candidate events are selected. The oscillation search is performed by measuring the low to high muon momentum ratio in the data sample and comparing it to the same ratio in the Monte Carlo simulation in the absence of neutrino oscillation. The measured double ratios for the ''all events'' (A) and high resolution (HR) samples are R{sub A} = R{sub low/high}{sup data}/R{sub low/high}{sup MC} = 0.60{sub -0.10}{sup +0.11}(stat) {+-} 0.08(syst) and R{sub HR} = R{sub low/high}{sup data}/R{sub low/high}{sup MC} …
Date:
February 1, 2007
Creator:
Rahman, Dipu
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
An Audit Report on Agencies' and Higher Education Institutions' Compliance with Benefits Proportional by Fund Requirements
Report of the Texas State Auditor's Office related to state agencies' and higher education institutions' compliance with benefits paid proportional to the source of the fund by requirements of the General Appropriations Act.
Date:
February 2007
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on Financial Management Practices at the Texas Medical Board
Report of the Texas State Auditor's Office related to reviewing financial management practices at the Texas Medical Board to determine whether funds are budgeted and spent as required by the General Appropriations Act, resources are used to accomplish the Board's mission, and financial information is reliable, accurate, and consistent.
Date:
February 2007
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on the Department of Transportation and the Trans-Texas Corridor
Report of the Texas State Auditor's Office related to verifying that Cintra Zachry, LP is developing the Master Development Plan and Master Financial Plan for the I-35 high priority segment of the Trans-Texas Corridor in accordance with the contract terms; determining whether the Department of Transportation's procurement for the first Trans-Texas Corridor construction project complied with applicable laws, rules, and regulations, including requirements in the March 2005 Comprehensive Development Agreement contract; and determining whether costs charged to the project are allowable under the contract.
Date:
February 2007
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
An Audit Report on the Financial Processes at the Board of Chiropractic Examiners
Report of the Texas State Auditor's Office related to determining whether the Board of Chiropractic Examiners' financial processes ensure accurate, complete, and reliable financial information, whether expenditures at the Board are properly authorized and necessary and reasonable for performance of agency functions; and whether revenues and expenditures at the Board are processed correctly and in a timely manner.
Date:
February 2007
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
The Baytown Sun (Baytown, Tex.), Vol. 86, No. 67, Ed. 1 Thursday, February 1, 2007
Daily newspaper from Baytown, Texas that includes local, state, and national news along with advertising.
Date:
February 1, 2007
Creator:
Clements, Clifford E.
Object Type:
Newspaper
System:
The Portal to Texas History