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• 1. [Article] Turbulence Regimes and Turbulence Intermittency in the Stable Boundary Layer during CASES-99

  This is the publisher’s final pdf. The published article is copyrighted by American Meteorological Society and can be found at: http://www.ametsoc.org/.

  Citation × Citation Citation Abstract Copy Title: Turbulence Regimes and Turbulence Intermittency in the Stable Boundary Layer during CASES-99 Author: Sun, Jielun, Pichugina, Yelena L., Mahrt, Larry, Banta, Robert M. This is the publisher’s final pdf. The published article is copyrighted by American Meteorological Society and can be found at: http://www.ametsoc.org/. Title: Turbulence Regimes and Turbulence Intermittency in the Stable Boundary Layer during CASES-99 Author: Sun, Jielun, Pichugina, Yelena L., Mahrt, Larry, Banta, Robert M. This is the publisher’s final pdf. The published article is copyrighted by American Meteorological Society and can be found at: http://www.ametsoc.org/. Close

• 2. [Article] Determinants of public opinion on renewable energy : the case of wave energy development in Oregon

  Renewable energy resources, such as wind, solar, and wave, have a number of advantages compared to traditional fossil fuels. Numerous studies attest to the physical potential for wave energy development ...

  Citation × Citation Citation Abstract Copy Title: Determinants of public opinion on renewable energy : the case of wave energy development in Oregon Author: Stefanovich Petrova, Maria A. Renewable energy resources, such as wind, solar, and wave, have a number of advantages compared to traditional fossil fuels. Numerous studies attest to the physical potential for wave energy development in Oregon. In transitioning from conventional fossil fuel to alternative energy provision, citizen understanding of the global energy problems and their causes and solutions is believed to be the key for the development of renewable energy. Using a statewide mail survey of 1,200 Oregonians this dissertation provides some insight and understanding about the determinants of public opinion with regards to renewable energy, the role these determinants play in public opinion formulation, and their relative importance in citizen support of or opposition toward wave energy development in Oregon. Citizen environmental values and value orientations, ideology preferences, climate change awareness and energy policy beliefs, familiarity with the technology, energy knowledge, and sociodemographic characteristics are examined. Using multiple regression analyses, the results reveal that several determinants serve as statistically significant predictors of attitudes toward wave energy development. Some of the most important are: familiarity with the technology, agreement with the possibility of increasing energy supplies while protecting the environment, and awareness about rising global temperatures. Some policy and theoretical implications of the findings are discussed and suggestions for further research are proposed. Title: Determinants of public opinion on renewable energy : the case of wave energy development in Oregon Author: Stefanovich Petrova, Maria A. Renewable energy resources, such as wind, solar, and wave, have a number of advantages compared to traditional fossil fuels. Numerous studies attest to the physical potential for wave energy development in Oregon. In transitioning from conventional fossil fuel to alternative energy provision, citizen understanding of the global energy problems and their causes and solutions is believed to be the key for the development of renewable energy. Using a statewide mail survey of 1,200 Oregonians this dissertation provides some insight and understanding about the determinants of public opinion with regards to renewable energy, the role these determinants play in public opinion formulation, and their relative importance in citizen support of or opposition toward wave energy development in Oregon. Citizen environmental values and value orientations, ideology preferences, climate change awareness and energy policy beliefs, familiarity with the technology, energy knowledge, and sociodemographic characteristics are examined. Using multiple regression analyses, the results reveal that several determinants serve as statistically significant predictors of attitudes toward wave energy development. Some of the most important are: familiarity with the technology, agreement with the possibility of increasing energy supplies while protecting the environment, and awareness about rising global temperatures. Some policy and theoretical implications of the findings are discussed and suggestions for further research are proposed. Close

• 3. [Article] A study of the physiological factors affecting the biological conversion of arsenite to arsenate

  Although arsenic is ubiquitous in the environment, certain forms of arsenic are added deliberately in ever increasing quantities. The addition of large quantities of the trivalent inorganic form (arsenite) ...

  Citation × Citation Citation Abstract Copy Title: A study of the physiological factors affecting the biological conversion of arsenite to arsenate Author: Phillips, Shirley E. Year: 1974 Although arsenic is ubiquitous in the environment, certain forms of arsenic are added deliberately in ever increasing quantities. The addition of large quantities of the trivalent inorganic form (arsenite) could pose a serious hazard because of the toxicity of this form explicable in terms of its action of sulfhydryl containing enzymes and/or coenzymes. In the environment B.rsenite is rapidly converted to arsenate (the pentavalent inorganic form). Since a biological explanation for the oxidation of arsenite to arsenate was available only for cattle dips (a unique environment), this study was undertaken to examine sewage for the presence of arsenite oxidizing bacteria. The isolation of bacteria capable of arsenite oxidation would allow a study of cultural and physiological properties and thus provide information useful in making rational decisions regarding the continued use of inorganic arsenicals as pesticides; as well as elucidating one segment of the arsenic cycle. Thirty-four different strains of arsenite oxidizing pseudomonads were isolated from sewage and classified into two major groups, Pseudomonas fluorescens-arsenoxydans and Pseudomonas acidovorans-arsenoxydans, with three and four ecotypes in each group. One particularily rapid arsenite oxidizing strain (designated Pseudomonas acidovorans-arsenoxydans YE56) was extensively studied. A minimal, defined medium was used to study the relationship of temperature, pH, aeration and nutrition to growth of this organism versus the ability of the organism to convert arsenite to arsenate under the same conditions. The conversion of arsenite to arsenate in YE56 was shown to be due to the appearance at stationary phase of an enzyme and/or component of the electron transport system when the organism is grown in chemically defined medium. In contrast, induction of the arsenite oxidizing system occurs in late exponential growth phase when the organism is grown in a rich medium. Thus, even though cell populations may never reach stationary phase in sewage, the ability of organisms to oxidize arsenite is probably constant. No energy could be detected from the oxidation of arsenite as measured by increase in growth rate or total cell yield. The adaptability of this organism to the changing environmental conditions of a sewage plant helps explain the findings that pseudomonads are the predominant species in sewage. A simple, unambiguous method for the separation of arsenite, arsenate and phosphate, using a combination of thin layer chromatography and paper chromatography, is described which makes it possible for investigators to define arsenic determinations to include the form (organic or inorganic), oxidation state (trivalent or pentavalent) and the quantity present in the samples. Title: A study of the physiological factors affecting the biological conversion of arsenite to arsenate Author: Phillips, Shirley E. Year: 1974 Although arsenic is ubiquitous in the environment, certain forms of arsenic are added deliberately in ever increasing quantities. The addition of large quantities of the trivalent inorganic form (arsenite) could pose a serious hazard because of the toxicity of this form explicable in terms of its action of sulfhydryl containing enzymes and/or coenzymes. In the environment B.rsenite is rapidly converted to arsenate (the pentavalent inorganic form). Since a biological explanation for the oxidation of arsenite to arsenate was available only for cattle dips (a unique environment), this study was undertaken to examine sewage for the presence of arsenite oxidizing bacteria. The isolation of bacteria capable of arsenite oxidation would allow a study of cultural and physiological properties and thus provide information useful in making rational decisions regarding the continued use of inorganic arsenicals as pesticides; as well as elucidating one segment of the arsenic cycle. Thirty-four different strains of arsenite oxidizing pseudomonads were isolated from sewage and classified into two major groups, Pseudomonas fluorescens-arsenoxydans and Pseudomonas acidovorans-arsenoxydans, with three and four ecotypes in each group. One particularily rapid arsenite oxidizing strain (designated Pseudomonas acidovorans-arsenoxydans YE56) was extensively studied. A minimal, defined medium was used to study the relationship of temperature, pH, aeration and nutrition to growth of this organism versus the ability of the organism to convert arsenite to arsenate under the same conditions. The conversion of arsenite to arsenate in YE56 was shown to be due to the appearance at stationary phase of an enzyme and/or component of the electron transport system when the organism is grown in chemically defined medium. In contrast, induction of the arsenite oxidizing system occurs in late exponential growth phase when the organism is grown in a rich medium. Thus, even though cell populations may never reach stationary phase in sewage, the ability of organisms to oxidize arsenite is probably constant. No energy could be detected from the oxidation of arsenite as measured by increase in growth rate or total cell yield. The adaptability of this organism to the changing environmental conditions of a sewage plant helps explain the findings that pseudomonads are the predominant species in sewage. A simple, unambiguous method for the separation of arsenite, arsenate and phosphate, using a combination of thin layer chromatography and paper chromatography, is described which makes it possible for investigators to define arsenic determinations to include the form (organic or inorganic), oxidation state (trivalent or pentavalent) and the quantity present in the samples. Close

• 4. [Article] The effect of human activity on the middle course of the Tualatin River, Oregon

  A diurnal study of biological, chemical, and physical parameters was made on the middle course of the, Tualatin River, which drains a 1840 km2 (711 mi2) basin adjacent to metropolitan Portland, Oregon. ...

  Citation × Citation Citation Abstract Copy Title: The effect of human activity on the middle course of the Tualatin River, Oregon Author: Carter, Lolita M. Year: 1975 A diurnal study of biological, chemical, and physical parameters was made on the middle course of the, Tualatin River, which drains a 1840 km2 (711 mi2) basin adjacent to metropolitan Portland, Oregon. This portion of the river lies along land in transition of use from rural agriculture to highly urbanized development. There is no nutrient loading of the river from farming practices because there was no return of water from summer, sprinkler irrigation of commercial crops. However, irrigation significantly reduces the volume of water in the river in the summers. Effluents from sewage treatment plants flowing into the tributaries that drain the highly urbanized eastern areas of the river basin are the main cause of degraded water quality and algal biomass in the lower reaches of the river. The Tualatin River above the mouth of Rock Creek is relatively unpolluted, but downstream from Rock Creek the river is highly eutrophic and during the periods of low flow in the summer serves as a sewage oxidation channel. In this same portion of the river there is also evidence that nitrification occurs. Winter floods leach nitrate-nitrogen from the basin, but in the summer the possibility exists. that nitrate-nitrogen may be a limiting nutrient for algal productivity in the river above Hillsboro. The principal source of poly-phosphates is from sewage treatment plant effluents, but concentrations of poly-phosphates in the middle reaches of the river indicate that there is a natural source of poly- and/or ortho-phosphates in the watershed. Removal of phosphorous compounds from the effluents probably would not affect the large algal blooms occurring in the river below Hillsboro. Trace metal analyses indicated that iron, potassium, nickel, zinc, lead, copper, cobalt, and chromium concentrations were higher during flooding. Turbidity readings suggest that these trace elements are deposited on the floodplain. Melted snow water, which caused one of the winter floods, contained concentrations of zinc, ·copper, and lead greater than those found in the river during the flood. Greater concentrations of arsenic and zinc came from farmland than from urban areas. Diversities of the net plankton as measured by the Shannon-Weaver Index did not change from season to season, nor with downstream flow. Species in the net plankton were benthic forms at the upper stations and planktonic forms downstream from Hillsboro, especially in the summer when the reduced flow caused the river to pond. The enriched effluents from Rock Creek did not affect the diversity of the organisms downstream, but supported a larger biomass. By rating the diversities with other studies it was found that the middle course of the Tualatin River is eutrophic but not heavily polluted. A diurnal study was especially valuable from April to September, inclusive, when insolation and temperatures favored biological activities such as photosynthesis and decomposition. From November to January little diurnal change in the water quality was found. Farming had its greatest impact in the quantity of water and municipalities had a more serious impact on the water quality in the middle course of the Tualatin River. Even with the reduced flow from agricultural irrigation, the river can maintain relatively good water quality, except when effluents from sewage plants caused highly eutrophic conditions. Title: The effect of human activity on the middle course of the Tualatin River, Oregon Author: Carter, Lolita M. Year: 1975 A diurnal study of biological, chemical, and physical parameters was made on the middle course of the, Tualatin River, which drains a 1840 km2 (711 mi2) basin adjacent to metropolitan Portland, Oregon. This portion of the river lies along land in transition of use from rural agriculture to highly urbanized development. There is no nutrient loading of the river from farming practices because there was no return of water from summer, sprinkler irrigation of commercial crops. However, irrigation significantly reduces the volume of water in the river in the summers. Effluents from sewage treatment plants flowing into the tributaries that drain the highly urbanized eastern areas of the river basin are the main cause of degraded water quality and algal biomass in the lower reaches of the river. The Tualatin River above the mouth of Rock Creek is relatively unpolluted, but downstream from Rock Creek the river is highly eutrophic and during the periods of low flow in the summer serves as a sewage oxidation channel. In this same portion of the river there is also evidence that nitrification occurs. Winter floods leach nitrate-nitrogen from the basin, but in the summer the possibility exists. that nitrate-nitrogen may be a limiting nutrient for algal productivity in the river above Hillsboro. The principal source of poly-phosphates is from sewage treatment plant effluents, but concentrations of poly-phosphates in the middle reaches of the river indicate that there is a natural source of poly- and/or ortho-phosphates in the watershed. Removal of phosphorous compounds from the effluents probably would not affect the large algal blooms occurring in the river below Hillsboro. Trace metal analyses indicated that iron, potassium, nickel, zinc, lead, copper, cobalt, and chromium concentrations were higher during flooding. Turbidity readings suggest that these trace elements are deposited on the floodplain. Melted snow water, which caused one of the winter floods, contained concentrations of zinc, ·copper, and lead greater than those found in the river during the flood. Greater concentrations of arsenic and zinc came from farmland than from urban areas. Diversities of the net plankton as measured by the Shannon-Weaver Index did not change from season to season, nor with downstream flow. Species in the net plankton were benthic forms at the upper stations and planktonic forms downstream from Hillsboro, especially in the summer when the reduced flow caused the river to pond. The enriched effluents from Rock Creek did not affect the diversity of the organisms downstream, but supported a larger biomass. By rating the diversities with other studies it was found that the middle course of the Tualatin River is eutrophic but not heavily polluted. A diurnal study was especially valuable from April to September, inclusive, when insolation and temperatures favored biological activities such as photosynthesis and decomposition. From November to January little diurnal change in the water quality was found. Farming had its greatest impact in the quantity of water and municipalities had a more serious impact on the water quality in the middle course of the Tualatin River. Even with the reduced flow from agricultural irrigation, the river can maintain relatively good water quality, except when effluents from sewage plants caused highly eutrophic conditions. Close

• 5. [Article] Metastability of copper indium gallium diselenide polycrystalline thin film solar cell devices

  xvi, 117 p. ; ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number.

  Citation × Citation Citation Abstract Copy Title: Metastability of copper indium gallium diselenide polycrystalline thin film solar cell devices Author: Lee, Jinwoo, 1973- Year: 2009, 2008 xvi, 117 p. ; ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. Title: Metastability of copper indium gallium diselenide polycrystalline thin film solar cell devices Author: Lee, Jinwoo, 1973- Year: 2009, 2008 xvi, 117 p. ; ill. (some col.) A print copy of this thesis is available through the UO Libraries. Search the library catalog for the location and call number. Close