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Regulatory elements of the floral homeotic gene AGAMOUS identified by phylogenetic footprinting and shadowing.
OAK-B135 In Arabidopsis thaliana, cis-regulatory sequences of the floral homeotic gene AGAMOUS (AG) are located in the second intron. This 3 kb intron contains binding sites for two direct activators of AG, LEAFY (LFY) and WUSCHEL (WUS), along with other putative regulatory elements. We have used phylogenetic footprinting and the related technique of phylogenetic shadowing to identify putative cis-regulatory elements in this intron. Among 29 Brassicaceae, several other motifs, but not the LFY and WUS binding sites previously identified, are largely invariant. Using reporter gene analyses, we tested six of these motifs and found that they are all functionally important for activity of AG regulatory sequences in A. thaliana. Although there is little obvious sequence similarity outside the Brassicaceae, the intron from cucumber AG has at least partial activity in A. thaliana. Our studies underscore the value of the comparative approach as a tool that complements gene-by-gene promoter dissection, but also highlight that sequence-based studies alone are insufficient for a complete identification of cis-regulatory sites.
Date:
June 1, 2003
Creator:
Hong, R. L., Hamaguchi, L., Busch, M. A., and Weigel, D.
Object Type:
Article
System:
The UNT Digital Library
Remote Manipulation for D&D Exhibiting Teleautonomy and Telecollaboration
The purpose of the work is to enhance remote operations of robotic systems for D&D tasks by extending teleoperation with semi-autonomous functions. The work leverages the $1.2M dual-arm work platform (DAWP) developed with broad participation for the CP5 D&D, as well as 2,000 hr DAWP D&D operational experience. We propose to develop a reactive, agent-based control architecture well suited to unstructured and unpredictable environments, and cobot control technology, which implements a virtual fixture that can be used to guide the application of tools with force-feedback control. Developed methodologies will be implemented using a structured light sensor and cobot hand controller on the dual-arm system.
Date:
June 2003
Creator:
Park, Young S.; Colgate, J. Edward; Ewing, Thomas F.; Kang, Hyoisig & Peshkin, Michael
Object Type:
Report
System:
The UNT Digital Library
Renewable Energy in Water and Wastewater Treatment Applications; Period of Performance: April 1, 2001--September 1, 2001
This guidebook will help readers understand where and how renewable energy technologies can be used for water and wastewater treatment applications. It is specifically designed for rural and small urban center water supply and wastewater treatment applications. This guidebook also provides basic information for selecting water resources and for various kinds of commercially available water supply and wastewater treatment technologies and power sources currently in the market.
Date:
June 1, 2003
Creator:
Argaw, N.
Object Type:
Report
System:
The UNT Digital Library
Report of the Red River Compact Commission: 2002
Report of the Red River Compact Commission describing the approved budgets, audits, and rules and regulations during fiscal year 2002.
Date:
June 2003
Creator:
Red River Compact Commission (U.S.)
Object Type:
Report
System:
The Portal to Texas History
A Report on The Fiscal Year 2003 University Accreditation Reviews
Report of the Texas State Auditor's Office related to five accreditation review reports published in fiscal year 2003, required as a part of the Southern Association of Colleges and Schools (SACS) university accreditation process.
Date:
June 2003
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
Report on the TCO/GCP Terrestrial Carbon Observations and Model-Data Fusion Workshop
The global carbon cycle is of intense interest to policy-makers, the scientific community, and public organizations. As a result, numerous new programmes and projects have been developed over the last few years. TCO and GCP are two such complementary initiatives which share a common goal of advancing the availability of more accurate and mutually consistent estimates of terrestrial carbon sources, sinks and processes, regionally and globally, through syntheses of observations and models. The workshop was intended to advance the availability of more accurate and mutually consistent estimates of the distribution of carbon sources and sinks at a regional and global level. This goal can be achieved by convergence of in situ and satellite observations, experiments and modelling strategies; improvements in data acquisition and sharing; and product generation, distribution and use. The workshop focused on the following questions and associated issues: 1. What carbon cycle data products could be routinely produced from a carbon observation system based on model-data and model-data fusion? 2. What are the main conceptual approaches to assimilating atmospheric carbon content, terrestrial carbon flux and remotely sensed data into coupled atmospheric circulation-carbon cycle models? 3. What is the present and eventual uncertainty regarding the main carbon fluxes at …
Date:
June 2003
Creator:
Quegan, Shaun
Object Type:
Text
System:
The UNT Digital Library
RESIDUA UPGRADING EFFICIENCY IMPROVEMENT MODELS: WRI COKING INDEXES
Pyrolysis experiments were conducted with three residua at 400 C (752 F) at various residence times. The wt % coke and gaseous products were measured for the product oils. The Western Research Institute (WRI) Coking Indexes were determined for the product oils. Measurements were made using techniques that might correlate with the Coking Indexes. These included spin-echo proton nuclear magnetic resonance spectroscopy, heat capacity measurements at 280 C (536 F), and ultrasonic attenuation. The two immiscible liquid phases that form once coke formation begins were isolated and characterized for a Boscan residuum pyrolyzed at 400 C (752 F) for 55 minutes. These materials were analyzed for elemental composition (CHNS), porphyrins, and metals (Ni,V) content.
Date:
June 1, 2003
Creator:
Schabron, John F.; Joseph F. Rovani, Jr.; Miknis, Francis P. & Turner, Thomas F.
Object Type:
Report
System:
The UNT Digital Library
A RESOLUTION ANALYSIS OF TWO GEOPHYSICAL IMAGING METHODS FOR CHARACTERIZING AND MONITORING HYDROLOGIC CONDITIONS IN THE VADOSE ZONE
The objective of this study is to characterize and analyze in-situ flow and transport within the vadose zone during a mid-scale hydrologic infiltration experiment. This project has employed numerical and experimental tools developed under a previously funded EMSP proposal (project number 55332) to provide 3-D unsaturated hydrologic property distributions. In the present project, geophysical imaging techniques have been employed to track analogue contaminant plumes. The results are providing a better understanding of transport modes including the influence of natural heterogeneities and man-made structures within the vadose zone at DOE sites. In addition the data is providing checks against which numerical flow and transport simulations can be compared.
Date:
June 1, 2003
Creator:
Alumbaugh, David L. & Brainard, James R.
Object Type:
Report
System:
The UNT Digital Library
A Resolution Analysis of Two Geophysical Imaging Methods for Characterizing and Monitoring Hydrologic Conditions in the Vadose Zone
This project has been designed to analyze the resolution of two different geophysical imaging techniques (electrical resistivity tomography and cross-borehole ground penetrating radar) for monitoring subsurface flow and transport processes within the vadose zone. This is to be accomplished through a coupled approach involving large scale unsaturated flow modeling, petrophysical conversion of the resulting 2 and 3 Dimensional water content and solute concentration fields to geophysical property models and generation of synthetic geophysical data, followed by the inversion of the synthetic geophysical data. The resolution, strengths, and limitations of the geophysical techniques will then be ascertained through an analysis involving comparisons between the original hydrologic modeling results and inverted geophysical images. Increasing levels of complexity will be added to the models as the project progresses through the addition of heterogeneity in the original hydrologic property model, and by adding uncertainty to the petrophysical relationship that couples the geophysical model to the hydrologic modeling results.
Date:
June 1, 2003
Creator:
Alumbaugh, David L.
Object Type:
Report
System:
The UNT Digital Library
Resolving the Impact of Biological Processes on DNAPL Transport in Unsaturated Porous Media through Nuclear Magnetic Resonance Relaxation Time Measurements
This research leads to a better understanding of how physical and biological properties of porous media influence water and dense non-aqueous phase liquid (DNAPL) distribution under saturated and unsaturated conditions. Knowing how environmental properties affect DNAPL solvent flow in the subsurface is essential for developing models of flow and transport that are needed for designing remediation and long-term stewardship strategies. This project investigates the capability and limitations of low-field nuclear magnetic resonance (NMR) relaxation decay-rate measurements for determining environmental properties affecting DNAPL solvent flow in the subsurface. For in-situ subsurface environmental applications, lowfield proton NMR measurements are preferred to the conventional high-field techniques commonly used to obtain chemical shift data, because the low field measurements are much less degraded by the magnetic susceptibility variations between the rock grains and the pore fluid s that significantly interfere with the high-field NMR measurements. Our research scope includes determining whether DNAPLs exist in water-wet or solvent-wet environments, the pore-size distribution of the soils containing DNAPLs, and the impact of biological processes on their transport mechanisms in porous media. Knowledge of the in situ flow properties and pore distributions of organic contaminants are critical to understanding where and when these fluids will enter subsurface …
Date:
June 1, 2003
Creator:
Hertzog, Russel; Geesey, Gill G.; White, Timothy A.; Ho, Clifford K.; Straley, Christian; Bryar, Traci R. et al.
Object Type:
Report
System:
The UNT Digital Library
Southwest Retort, Volume 55, Number 9, May/June 2003
This publication of the Dallas-Fort Worth Section of the American Chemical Society includes information about research, prominent scientist, organizational business, and various other stories of interest to the community.
Date:
June 2003
Creator:
American Chemical Society. Dallas/Fort Worth Section.
Object Type:
Journal/Magazine/Newsletter
System:
The UNT Digital Library
A Review of Fiscal Year 2002 Encumbrances and Payables at Selected Agencies
Report of the Texas State Auditor's Office related to reviewing encumbrances and accounts payable at seven agencies to determine whether they accurately reported their obligations as of August 31, 2002, in accordance with Accounting Policy Statement (APS) 018: Encumbrance Report and Lapsing of Appropriations.
Date:
June 2003
Creator:
Texas. Office of the State Auditor.
Object Type:
Report
System:
The Portal to Texas History
A Review of Methods for the Manufacture of Residential RoofingMaterials
Shingles, tiles, and metal products comprise over 80% (by roof area) of the California roofing market (54-58% fiberglass shingle, 8-10% concrete tile, 8-10% clay tile, 7% metal, 3% wood shake, and 3% slate). In climates with significant demand for cooling energy, increasing roof solar reflectance reduces energy consumption in mechanically cooled buildings, and improves occupant comfort in non-conditioned buildings. This report examines methods for manufacturing fiberglass shingles, concrete tiles, clay tiles, and metal roofing. The report also discusses innovative methods for increasing the solar reflectance of these roofing materials. We have focused on these four roofing products because they are typically colored with pigmented coatings or additives. A better understanding of the current practices for manufacturing colored roofing materials would allow us to develop cool colored materials creatively and more effectively.
Date:
June 1, 2003
Creator:
Akbari, Hashem; Levinson, Ronnen & Berdahl, Paul
Object Type:
Report
System:
The UNT Digital Library
Reviving Abandoned Reservoirs With High-Pressure Air Injection: Application in a Fractured and Karsted Dolomite Reservoir
The Bureau of Economic Geology and Goldrus Producing Company have assembled a multidisciplinary team of geoscientists and engineers to evaluate the applicability of high-pressure air injection (HPAI) in revitalizing a nearly abandoned carbonate reservoir in the Permian Basin of West Texas. The characterization phase of the project is utilizing geoscientists and petroleum engineers from the bureau of Economic Geology and the Department of Petroleum Engineering (both at The University of Texas at Austin) to define the controls on fluid flow in the reservoir as a basis for developing a reservoir model. This model will be used to define a field deployment plant that Goldrus, a small independent oil company, will implement by drilling both vertical and horizontal wells during the demonstration phase of the project. Additional reservoir data are being gathered during the demonstration phase to improve the accuracy of the reservoir model. The results of the demonstration are being closely monitored to provide a basis for improving the design of the HPAI field deployment plan. The results of the reservoir characterization field demonstration and monitoring program will be documented and widely disseminated to facilitate adoption of this technology by oil operators in the Permian Basin and elsewhere in the …
Date:
June 1, 2003
Creator:
Loucks, Robert; Ruppel, Steve; Gale, Julia; Holder, Jon; Olsen, Jon; Combs, Deanna et al.
Object Type:
Report
System:
The UNT Digital Library
Robust linear coupling correction with N-turn maps
N/A
Date:
June 1, 2003
Creator:
Fischer, W.
Object Type:
Report
System:
The UNT Digital Library
Round Up, June 2003
Magazine for Texas Lottery retailers that contains news, retailer spotlights, and a list of lottery winners.
Date:
June 2003
Creator:
Texas Lottery Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Rural Renewable Applications
Bulletin describing agricultural producers' usage of renewable energies in Texas.
Date:
June 2003
Creator:
Texas. State Energy Conservation Office.
Object Type:
Pamphlet
System:
The Portal to Texas History
Salt valve and instrumentation test using the nagle long shafted pump :final report.
The Salt Valve and Instrumentation Test was done to provide data on equipment performance in high temperature environments similar to that expected in the next large scale application of that technology. The experiment tested three different valves: (1) a valve with the standard valve body and standard high temperature self-packing material; (2) a valve with the standard valve body and stainless steel O-rings; and (3) a magnetic valve that uses a high temperature coil and no packing material. The first valve, which was used at Solar Two, performed sufficiently throughout the test with only a small leak from the split-body, not the packing material, on the 6th day of testing on the long-term test. The second valve, with the stainless steel O-rings, developed a small leak on the last run of the third test at the bonnet (packing material), at which point it was noted to watch if it got worse and the test continued. By the 6th day of the long-term test, the leak was significant (up to 3 cups per day) and the test was terminated. The magnetic valve failed when exposed to a relatively low temperature of 500 F. According to the manufacturer, it was expected to …
Date:
June 1, 2003
Creator:
Welch, Kathleen T.
Object Type:
Report
System:
The UNT Digital Library
Salt Valve and Instrumentation Test Using the Nagle Long Shafted Pump: Final Report
The Salt Valve and Instrumentation Test was done to provide data on equipment performance in high temperature environments similar to that expected in the next large scale application of that technology. The experiment tested three different valves: (1) a valve with the standard valve body and standard high temperature self-packing material; (2) a valve with the standard valve body and stainless steel O-rings; and (3) a magnetic valve that uses a high temperature coil and no packing material. The first valve, which was used at Solar Two, performed sufficiently throughout the test with only a small leak from the split-body, not the packing material, on the 6th day of testing on the long-term test. The second valve, with the stainless steel O-rings, developed a small leak on the last run of the third test at the bonnet (packing material), at which point it was noted to watch if it got worse and the test continued. By the 6th day of the long-term test, the leak was significant (up to 3 cups per day) and the test was terminated. The magnetic valve failed when exposed to a relatively low temperature of 500 F. According to the manufacturer, it was expected to …
Date:
June 1, 2003
Creator:
WELCH, KATHLEEN T.
Object Type:
Report
System:
The UNT Digital Library
Sapulpa Daily Herald (Sapulpa, Okla.), Vol. 88, No. 216, Ed. 1 Sunday, June 1, 2003
Daily newspaper from Sapulpa, Oklahoma that includes local, state, and national news along with advertising.
Date:
June 1, 2003
Creator:
Broaddus, Matthew B.
Object Type:
Newspaper
System:
The Gateway to Oklahoma History
Science& Technology Review June 2003
This month's issue has the following articles: (1) Livermore's Three-Pronged Strategy for High-Performance Computing, Commentary by Dona Crawford; (2) Riding the Waves of Supercomputing Technology--Livermore's Computation Directorate is exploiting multiple technologies to ensure high-performance, cost-effective computing; (3) Chromosome 19 and Lawrence Livermore Form a Long-Lasting Bond--Lawrence Livermore biomedical scientists have played an important role in the Human Genome Project through their long-term research on chromosome 19; (4) A New Way to Measure the Mass of Stars--For the first time, scientists have determined the mass of a star in isolation from other celestial bodies; and (5) Flexibly Fueled Storage Tank Brings Hydrogen-Powered Cars Closer to Reality--Livermore's cryogenic hydrogen fuel storage tank for passenger cars of the future can accommodate three forms of hydrogen fuel separately or in combination.
Date:
June 1, 2003
Creator:
McMahon, D
Object Type:
Report
System:
The UNT Digital Library
SEALING LARGE-DIAMETER CAST-IRON PIPE JOINTS UNDER LIVE CONDITIONS
Utilities in the U.S. operate over 75,000 km (47,000 miles) of old cast-iron pipes for gas distribution. The bell-and-spigot joints tend to leak as these pipes age. Current repair practices are costly and highly disruptive. The objective of this program is to design, test and commercialize a robotic system capable of sealing multiple cast-iron bell and spigot joints from a single pipe entry point. The proposed system will perform repairs while the pipe remains in service by traveling through the pipe, cleaning each joint surface, and attaching a stainless-steel sleeve lined with an epoxy-impregnated felt across the joint. This approach will save considerable time and labor, avoid traffic disruption, and eliminate any requirement to interrupt service (which results in enormous expense to utilities). Technical challenges include: (1) repair sleeves must compensate for diametric variation and eccentricity of cast-iron pipes; (2) the assembly must travel long distances through pipes containing debris; (3) the pipe wall must be effectively cleaned in the immediate area of the joint to assure good bonding of the sleeve; and (4) an innovative bolt-on entry fitting is required to conduct repair operations on live mains. The development effort is divided into eleven tasks. Task 1-Program Management was …
Date:
June 1, 2003
Creator:
Kothari, Kiran M. & Pittard, Gerard T.
Object Type:
Report
System:
The UNT Digital Library
Seismic and Rock Physics Diagnostics of Multiscale Reservoir Textures
As part of our study on ''Relationships between seismic properties and rock microstructure'', we have studied (1) Elastic properties of clay minerals using Pulse Transmission experiments. We show measurements of elastic moduli and strain in clay minerals.
Date:
June 1, 2003
Creator:
Mavko, Gary
Object Type:
Report
System:
The UNT Digital Library
Semi-Passive Chemical Oxidation Schemes for the Long-Term Treatment of Contaminants
In situ chemical oxidation or ISCO schemes involve the addition of a chemical oxidant, such as potassium permanganate (KMnO4), which destroys chlorinated solvents like TCE in a straightforward reaction. Although ISCO is now regarded as a developing technology in an industrial sense, beyond active flushing schemes, there have been relatively limited investigations in how ISCO might be better used. Our previous study showed that KMnO4 flushing approaches often would be frustrated by the inability to control the delivery of the treatment fluid due to precipitation of low-permeability reaction by-product like MnO2 and other problems. It was therefore suggested that development of a new ISCO scheme that can provide both destruction efficiencies and plugging control would be required. The goal of our current study is to develop a scientific basis for the use of new semi-passive, well-based ISCO systems for treating chlorinated ethylene in groundwater. More specifically, our work examines the possibilities of developing a slow release KMnO4 scheme. This scheme could be operated in a semi-passive manner with periodic additions of the slow-release KMnO4 solids into well-delivery systems. To our knowledge, a system of this type has not been demonstrated. Our current scientific work is then concerned with how to …
Date:
June 1, 2003
Creator:
Schwartz, Frank
Object Type:
Report
System:
The UNT Digital Library