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Tierra Grande, Volume 7, Number 2, April 2000
Quarterly journal providing information related to various aspects of real estate buying and ownership.
Date:
April 2000
Creator:
Texas A & M University. Real Estate Center.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Time resolved ion beam induced charge collection
Under this effort, a new method for studying the single event upset (SEU) in microelectronics has been developed and demonstrated. Called TRIBICC, for Time Resolved Ion Beam Induced Charge Collection, this technique measures the transient charge-collection waveform from a single heavy-ion strike with a {minus}.03db bandwidth of 5 GHz. Bandwidth can be expanded up to 15 GHz (with 5 ps sampling windows) by using an FFT-based off-line waveform renormalization technique developed at Sandia. The theoretical time resolution of the digitized waveform is 24 ps with data re-normalization and 70 ps without re-normalization. To preserve the high bandwidth from IC to the digitizing oscilloscope, individual test structures are assembled in custom high-frequency fixtures. A leading-edge digitized waveform is stored with the corresponding ion beam position at each point in a two-dimensional raster scan. The resulting data cube contains a spatial charge distribution map of up to 4,096 traces of charge (Q) collected as a function of time. These two dimensional traces of Q(t) can cover a period as short as 5 ns with up to 1,024 points per trace. This tool overcomes limitations observed in previous multi-shot techniques due to the displacement damage effects of multiple ion strikes that changed the …
Date:
April 1, 2000
Creator:
Sexton, Frederick W.; Walsh, David S.; Doyle, Barney L. & Dodd, Paul E.
Object Type:
Report
System:
The UNT Digital Library
Time-series records of pCO{sub 2} and NO{sub 3} during the OMP Field Program: a final report for DOE Grant DE-FG03-96ER62224
The specific goals of this research are to (1) determine daily and seasonal variability of seawater pCO{sub 2} partial pressure of CO{sub 2} and NO{sub 3} in Middle Atlantic Bight (MAB) waters; (2) estimate seasonal CO{sub 2} fluxes between the MAB shelf and the atmosphere; and (3) determine the primary controls of surface seawater pCO{sub 2} in this coastal system. During the first phase of the DOE-OMP (1992-1995) we developed the Submersible Autonomous Moored Instrument for CO{sub 2} (SAMI-CO{sub 2}) which is designed to measure seawater CO{sub 2} on ocean moorings for extended periods.
Date:
April 1, 2000
Creator:
DeGrandpre, Michael D.
Object Type:
Report
System:
The UNT Digital Library
Transportation News, Volume 25, Number 8, April 2000
Newsletter published by the Texas Department of Transportation for TxDOT employees including information about the organization, projects throughout the state, and other topics related to transportation in Texas.
Date:
April 2000
Creator:
Texas. Department of Transportation.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Travel-N-Texas Update, Number 27, April 2000
Newsletter of the Texas General Services Commission discussing news and activities of the organization as well as other information related to business travel for state employees.
Date:
April 2000
Creator:
Texas. General Services Commission.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
TRC Today, Volume 23, Number 2, April/May 2000
Newsletter of the Texas Rehabilitation Commission discussing information about the Commission as well as news, events, and other relevant information.
Date:
April 2000
Creator:
Texas Rehabilitation Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Treatment of Produced Oil and Gas Waters With Surfactant-Modified Zeolite
Whereas most water produced from onshore oil and gas operations is disposed via reinjection, some waters, such as those from offshore production platforms, coastal production, and some onshore wells, must be treated to remove organic constituents before the water is discharged. Current methods for reducing residual free phases and dissolved organic carbon are not always fully effective in meeting regulatory limits. In addition, cost, space requirements, and ease of use are important factors in any treatment system. Surfactant-modified zeolite (SMZ) has been used successfully to treat contaminated ground water for organic and inorganic constituents. This research will use laboratory batch and column studies to design a field system that will be used to treat produced waters to reduce dissolved and free-phase organic constituents. The system will be designed to operate simply and to have low operating costs. Methods for regeneration of the spent zeolite will also be tested, as will the treatment system at a field production site in the final project task. Research over the past six months has focused on the selection and characterization of the surfactant modified zeolite and the produced waters. The zeolite to be used in this work has been obtained from St. Cloud Mine …
Date:
April 1, 2000
Creator:
Katz, Lynn E.; Sullivan, E. J. & Bowman, R. S.
Object Type:
Report
System:
The UNT Digital Library
Two-Phase Reaction Turbine
None
Date:
April 1, 2000
Creator:
Fabris, Gracio
Object Type:
Report
System:
The UNT Digital Library
Washington Phase II Fish Diversion Screen Evaluations in the Yakima River Basin, 1999.
Pacific Northwest National Laboratory (PNNL) evaluated 20 Phase II screen sites in the Yakima River Basin as part of a multi-year study for the Bonneville Power Administration (BPA) on the effectiveness of fish screening devices. The sites were examined to determine if they were being effectively operated and maintained to provide fish a safe, efficient return to the Yakima River. Data were collected to determine if velocities in front of the screens and in the bypass met current National Marine Fisheries Service (NMFS) criteria to promote safe and timely fish bypass and whether bypass outfall conditions allowed fish to safely return to the river. In general, water velocity conditions at the screen sites met fish passage criteria set forth by the NMFS. Although velocities often fluctuated from one sampling location to the next, average sweep velocities typically exceeded approach velocities and increased toward the bypass. Mean approach velocities were below the NMFS criteria of < 0.4 feet per second (fps) at most sites (Table 1). Based on our observations in 1999, we believe that most facilities were efficiently protecting juvenile fish from entrainment, impingement, or migration delay. Most screens were properly sealed to prevent fish entrainment and injury, although potential …
Date:
April 1, 2000
Creator:
Blanton, S. L.; Neitzel, Duane A. & McMichael, Geoffrey A.
Object Type:
Report
System:
The UNT Digital Library
Winning, April 2000
Pamphlet containing information about Texas Lottery winners, scratch-off prizes, new games, and more.
Date:
April 2000
Creator:
Texas Lottery Commission
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History