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24,697 Matching Results
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[California Crossing]
Photograph of driftwood floating down a river.
Date:
December 5, 1977
Creator:
Dallas (Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
[California Crossing]
Photograph of a body of water surrounded by concrete. Driftwood floats downstream. The water is surrounded by trees.
Date:
December 2, 1977
Creator:
Dallas (Tex.)
Object Type:
Photograph
System:
The Portal to Texas History
Crossing symmetry is incompatible with general relativity
None
Date:
December 1, 1994
Creator:
Noyes, H. P.
Object Type:
Report
System:
The UNT Digital Library
Energy scaling, crab crossing and the pair problem
Making reasonable assumptions, the luminosities of linear colliders are calculated for center-of-mass energies of 10 GeV, 100 GeV and 1 TeV. A calculation is also mode for a 1/2 TeV collider that could be upgraded to 1 TeV later. The improvements possible using ''crab-like'' crossing are also given. 4 refs., 4 figs., 3 tabs.
Date:
December 1, 1988
Creator:
Palmer, Robert B.
Object Type:
Article
System:
The UNT Digital Library
ILC Extraction Line for 14 mrad Crossing Angle
The earlier studies of the ILC extraction line for 20 mrad and 2 mrad crossing angle options [1]-[5] showed that the 20 mrad design has an advantage of a simpler beamline and lower extraction beam loss because of the independent incoming and extraction optics. However, the large 20 mrad crossing angle requires the use of a crab cavity correction, increases synchrotron radiation emittance growth in the solenoid, and increases photon backscattering from the forward calorimeter of the detector. To reduce these effects, an attempt has been made to minimize the crossing angle while keeping the extraction and incoming lines separate. A new quadrupole scheme near the interaction point has been proposed which allows a reduction of the crossing angle to 14 mrad [6]. The optics design and results of tracking and background simulations for the 14 mrad extraction line are presented.
Date:
December 8, 2005
Creator:
Nosochkov, Y.; Markiewicz, T.; Maruyama, T.; Seryi, A. & Parker, B.
Object Type:
Article
System:
The UNT Digital Library
Ranges of consideration: crossing the fields of ecology, philosophy and science studies.
Access:
Use of this item is restricted to the UNT Community
Environmental issues are often complex with many different constituents operating according to a broad range of communication techniques. In order to foster negotiations, different perspectives need to be articulated in lucid ways sensitive to various viewpoints and circumstances. In my thesis I investigate how certain approaches to environmental discourse effect dialogue and negotiation. My first two chapters focus on environmental problems surrounding rangeland ecology along the U.S./Mexico border; whereas the last two chapters explore more theoretical conflicts concerning the philosophy of nature. Throughout the thesis I show the significance of nonhumans (prairie dogs, cattle, biological assessment sheets, environmental laws, etc.) in the human community. Only by considering the roles of nonhumans do we broaden and enrich the conversation between ourselves concerning environmental issues.
Date:
December 2002
Creator:
Dinneen, Nathan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Geothermal resources in California: potentials and problems
The technology, cost and potential of geothermal resources in California are examined. The production of power from dry stream fields is expanding in Northern California, at The Geysers, at costs that compare favorably with alternate means of generation. The possibility exists that economic production of power can be started in the Imperial Valley, but numerous issues remain to be resolved; chief among them is the demonstration that commercially valuable aquifers indeed exist. The production of demineralized water from the geothermal fluids of the Imperial Valley depends, among other things, upon the identification of other sources of water for power plant cooling, or for reservoir reinjection, should it be necessary to avoid subsidence. It would appear that water production, without the income-producing capability of associated power generation, is not economically reasonable. The pace of geothermal development at the Geysers could probably be accelerated perhaps offering the opportunity for maintenance of adequate generating reserves should their nuclear construction program be delayed. The unknown factors and risks involved seem to preclude the Imperial Valley resource from being immediately effective in improving the power generation picture in Southern California. However, in the next decade, geothermal power could provide a useful energy increment, perhaps 10 …
Date:
December 1, 1971
Creator:
Goldsmith, M.
Object Type:
Report
System:
The UNT Digital Library
Mechanisms and genetic control of interspecific crossing barriers in lycopersicon. Progress report, First year, August 1, 1992
The goal of this program is to use Lycopersica esculentum and L. pennellii as a model system to study the interspecific reproductive barriers unilateral incongruity (UI), hybrid breakdown and interspecific aberrant ratio syndrome (IARS). Specifically we seek to determine the functional basis of UI including the timing of the failure of incongruous crosses, the developmental step(s) interrupted by UI, the tissue and genomes involved in UI.
Date:
December 31, 1992
Creator:
Mutschler, M. A. & McCormick, S.
Object Type:
Report
System:
The UNT Digital Library
Coastal Cliff Sediments, San Diego Region, Dana Point to the Mexican Border (1887 to 1947)
From Summary: These studies document the temporally episodic and areally site-specific character of subaerial erosion, which is shown to be directly related to prevailing meteorologic conditions.
Date:
December 1988
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
California's San Joaquin Valley: A Region in Transition
This report analyzes the San Joaquin Valley (SJV) counties and statistically documents the basis of current socioeconomic conditions. The report further explores the extent to which the SJV shares similarities with and differs from the Appalachian Regional Commission (ARC) area and a 68- county Central Appalachian subregion which contains some of the most economically distressed counties in Appalachia. The report also examines the role of federal expenditures in the cities and counties of the SJV. In addition to examining socioeconomic conditions in the SJV, the report provides analysis of water supply and quality issues especially those concerning agriculture, air quality concerns, and rail and shipping issues.
Date:
December 12, 2005
Creator:
Cowan, Tadlock
Object Type:
Report
System:
The UNT Digital Library
On the Fence
Living the vast majority of my life in an area that celebrates diversity but thrives because of illegal cross-border activities (undocumented workers, drug imports) at times the distance between the United States and Mexico is in fact as thin as the width of a fence. Though it is typical for a filmmaker to hope to present a unique take on a subject, given how I have seen the topics of immigration and the perspective of the purpose of homeland security portray, I am confident that there is an opportunity to show these issues in a more personal, less aggressive light with the use of first person accounts instead of a dependence on the most violent aspects of these topics. The main subject will give character to this agency by blurring the lines of his life as an agent and as a citizen.
Date:
December 2014
Creator:
Medrano, Estevan
Object Type:
Thesis or Dissertation
System:
The UNT Digital Library
Seismic Refraction Investigation of the Salton Sea Geothermal Area, Imperial Valley, California
Seven seismic refraction profiles and four long-distance refraction shots have been used to investigate the Salton Sea geothermal area. From these data, two models of the geothermal and adjacent area are proposed. Model 1 proposes a basement high within the geothermal area trending parallel to the axis of the Imperial Valley. Model 2 assumes a horizontal basement in the E-W direction, and proposes a seismic velocity gradient that increases the apparent basement velocity from east to west approximately 15% within the geothermal area. Both models propose basement dip of 3 degrees to the south, yielding a thickness of sediments of 6.6 km near Brawley, California, in the center of the Imperial Valley. Based on offsets inferred in the sedimentary seismic layers of the geothermal area, two NW-SE trending fault zones are proposed.
Date:
December 1, 1978
Creator:
Frith, R. B.
Object Type:
Report
System:
The UNT Digital Library
Melt zones beneath five volcanic complexes in California: an assessment of shallow magma occurrences
Recent geological and geophysical data for five magma-hydrothermal systems were studied for the purpose of developing estimates for the depth, volume and location of magma beneath each area. The areas studied were: (1) Salton Trough, (2) The Geysers-Clear Lake, (3) Long Valley caldera, (4) Coso volcanic field, and (5) Medicine Lake volcano, all located in California and all selected on the basis of recent volcanic activity and published indications of crustal melt zones. 23 figs.
Date:
December 1, 1984
Creator:
Goldstein, N. E. & Flexser, S.
Object Type:
Report
System:
The UNT Digital Library
Roles of repetitive sequences
The DNA of higher eukaryotes contains many repetitive sequences. The study of repetitive sequences is important, not only because many have important biological function, but also because they provide information on genome organization, evolution and dynamics. In this paper, I will first discuss some generic effects that repetitive sequences will have upon genome dynamics and evolution. In particular, it will be shown that repetitive sequences foster recombination among, and turnover of, the elements of a genome. I will then consider some examples of repetitive sequences, notably minisatellite sequences and telomere sequences as examples of tandem repeats, without and with respectively known function, and Alu sequences as an example of interspersed repeats. Some other examples will also be considered in less detail.
Date:
December 31, 1991
Creator:
Bell, G. I.
Object Type:
Article
System:
The UNT Digital Library
Proceedings of the 1975 PEP summer study, July 28--August 20, 1975, Berkeley, California
Separate abstracts were prepared for the 27 papers in this report. (RWR)
Date:
December 1, 1975
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library
Siting and drilling recommendations for a geothermal exploration well, Wendel-Amedee KGRA, Lassen County, California
All available exploration data relevant to the GeoProducts leasehold in the Wendel-Amedee KGRA are reviewed and interpreted. On the basis of this interpretation, locations and procedures are recommended for drilling geothermal production wells capable of supplying fluid at a temperature of 250/sup 0/F or greater. The following are covered: stratigraphy and geological history, geologic structure, geochemistry, geophysics, temperature-gradient data, and fluid quality. (MHR)
Date:
December 1, 1980
Creator:
McNitt, J. R. & Wilde, W. R.
Object Type:
Report
System:
The UNT Digital Library
Increasing Heavy Oil in the Wilmington Oil Fiel Through Advanced Reservoir Characterization and Thermal Production Technologies. Annual Report, March 30, 1995--March 31, 1996
The objective of this project is to increase heavy oil reserves in a portion of the Wilmington Oil Field, near Long Beach, California, by implementing advanced reservoir characterization and thermal production technologies. Based on the knowledge and experience gained with this project, these technologies are intended to be extended to other sections of the Wilmington Oil Field, and, through technology transfer, will be available to increase heavy oil reserves in other slope and basin clastic (SBC) reservoirs.
Date:
December 1, 1996
Creator:
Allison, Edith
Object Type:
Report
System:
The UNT Digital Library
Increasing heavy oil reserves in the Wilmington oil field through advanced reservoir characterization and thermal production technologies. Quarterly report, July 1 - September 30, 1996
The project involves improving thermal recovery techniques in a slope and basin clastic (SBC) reservoir in the Wilmington field, Los Angeles Co., Calif. using advanced reservoir characterization and thermal production technologies. This is the sixth quarterly technical progress report for the project. Through September 1996, the project continues to make good progress but is slightly behind schedule. Estimated costs are on budget for the work performed to date. Technical achievements accomplished during the quarter include placing the first two horizontal wells on production following cyclic steam stimulation, completing several draft technical reports and preparing presentations on the deterministic geologic model, steam channel crossing and horizontal well drilling for technical transfer. Cyclic steam injection into the first two horizontal wells was completed in June 1996 and initial oil production from the project began the same month. Work has commenced on the stochastic geologic and reservoir simulation models. High temperature core work and reservoir tracer work will commence in the First Quarter 1997.
Date:
December 1, 1996
Creator:
Hara, S.
Object Type:
Report
System:
The UNT Digital Library
Simulated performance of CIEE's 'Alternatives to Compressive Cooling' prototype house under design conditions in various California climates
To support the design development of a compressorless house that does not rely on mechanical air-conditioning, the author carried out detailed computer analysis of a prototypical house design to determine the indoor thermal conditions during peak cooling periods for over 170 California locations. The peak cooling periods are five-day sequences at 2{percent} frequency determined through statistical analysis of long-term historical weather data. The DOE-2 program was used to simulate the indoor temperatures of the house under four operating options: windows closed, with mechanical ventilation, evaporatively-cooled mechanical ventilation, or a conventional 1 1/2-ton air conditioner. The study found that with a 1500 CFM mechanical ventilation system, the house design would maintain comfort under peak conditions in the San Francisco Bay Area out to Walnut Creek, but not beyond. In southern California, the same system and house design would maintain adequate comfort only along the coast. With the evaporatively-cooled ventilation system, the applicability of the house design can be extended to Fairfield and Livermore in northern California, but in southern California a larger 3000 CFM system would be needed to maintain comfort conditions over half of the greater Los Angeles area, the southern half of the Inland Empire, and most of San …
Date:
December 1, 1999
Creator:
Huang, Yu Joe
Object Type:
Report
System:
The UNT Digital Library
Proceedings of the conference on research for the development of geothermal energy resources held in Pasadena, California, September 23--25, 1974
None
Date:
December 31, 1974
Creator:
unknown
Object Type:
Article
System:
The UNT Digital Library
Ground-Water Conditions in the Eureka Area, Humboldt County, California, 1975
This report examines water quality, levels, and use for groundwater in the Eureka Area, Humboldt County, California. It includes maps, graphs, and other figures.
Date:
December 1978
Creator:
Johnson, Michael J.
Object Type:
Report
System:
The UNT Digital Library
ERDA summer study of heavy ions for inertial fusion, Oakland/Berkeley, California, July 19--30, 1976. Final report
Technical summaries are given for the following areas: (1) target and reactor design, (2) ion sources, (3) low-velocity acceleration, (4) atomic and molecular physics, (5) accelerator parameters, (6) beam manipulations, (7) induction linac, (8) final focusing and transmission to the target, (9) systems and cost studies, and (10) alternatives. Several groups of appendices are given that relate to these technical summaries. (MOW)
Date:
December 1, 1976
Creator:
Bangerter, R. O.; Herrmannsfeldt, W. B.; Judd, D. L. & Smith, L.
Object Type:
Report
System:
The UNT Digital Library
The Western Outlook (San Francisco and Oakland, Calif.), Vol. 34, No. 10, Ed. 1 Saturday, December 10, 1927
Weekly African-American newspaper published in Oakland, California that includes local, state and national news along with extensive advertising.
Date:
December 10, 1927
Creator:
Wysinger, J. E. & Derrick, J. Lincoln
Object Type:
Newspaper
System:
The Portal to Texas History
Draft Environmental Impact Report. California Department of Water Resources, Bottle Rock Geothermal Power Plant, Lake County, CA
The California Department of Water Resources (DWR) proposes to construct the Bottle Rock power plant, a 55 MW geothermal power plant, at The Geysers Known Geothermal Resource Area (KGRA). The plant is projected to begin operation in April of 1983, and will be located in Lake County near the Sonoma County line on approximately 7.2 acres of the Francisco leasehold. The steam to operate the power plant, approximately 1,000,000 pounds/h, will be provided by McCulloch Geothermal Corporation. The power plant's appearance and operation will be basically the same as the units in operation or under construction in the KGRA. The power plant and related facilities will consist of a 55 MW turbine generator, a 1.1 mile (1.81 km) long transmission line, a condensing system, cooling tower, electrical switchyard, gas storage facility, cistern, and an atmospheric emission control system. DWR plans to abate hydrogen sulfide (H/sub 2/S) emissions through the use of the Stretford Process which scrubs the H/sub 2/S from the condenser vent gas stream and catalytically oxides the gas to elemental sulfur. If the Stretford Process does not meet emission limitations, a secondary H/sub 2/S abatement system using hydrogen peroxide/iron catalyst is proposed. The Bottle Rock project and other …
Date:
December 1, 1979
Creator:
unknown
Object Type:
Report
System:
The UNT Digital Library