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Articles 361 - 368 of 368
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Estimation Of The Particle And Gas Scavenging Contributions To Wet Deposition Of Organic And Inorganic Nitrogen, Silvia Margarita Calderã³N
Estimation Of The Particle And Gas Scavenging Contributions To Wet Deposition Of Organic And Inorganic Nitrogen, Silvia Margarita Calderã³N
USF Tampa Graduate Theses and Dissertations
Atmospheric deposition of nitrogen species represents an additional nutrient source to natural environments, and can alter the nitrogen cycle by increasing nutrient levels beyond the requirements of organisms. In Tampa Bay, atmospheric deposition of dissolved inorganic nitrogen species (DIN) has been found to be the second largest nitrogen source, but little is known about dissolved organic nitrogen species (DON). The research goal was to improve the dry and wet deposition estimates by inclusion of the DON contribution. In the atmospheric chemistry field a standard method to measure DON in atmospheric samples has not been agreed upon. This research proposes the …
Statistical Models In Environmental And Life Sciences, Lakshminarayan Rajaram
Statistical Models In Environmental And Life Sciences, Lakshminarayan Rajaram
USF Tampa Graduate Theses and Dissertations
The dissertation focuses on developing statistical models in environmental and life sciences. The Generalized Extreme Value distribution is used to model annual monthly maximum rainfall data from 44 locations in Florida. Time dependence of the rainfall data is incorporated into the model by assuming the location parameter to be a function of time, both linear and quadratic. Estimates and confidence intervals are obtained for return levels of return periods of 10, 20, 50, and 100 years. Locations are grouped into statistical profiles based on their similarities in return level graphs for all locations, and locations within each climatic zone. A …
A Descriptive Study Of Students' Perspectives On Controversial Issues Embedded In A College Environmental Science Course, Chyrisse P. Tabone
A Descriptive Study Of Students' Perspectives On Controversial Issues Embedded In A College Environmental Science Course, Chyrisse P. Tabone
USF Tampa Graduate Theses and Dissertations
This qualitative study described non-science undergraduate majors' responses to controversial issues embedded in an introductory level environmental science course in a liberal arts college located in the southeastern United States. Participants enrolled in this 12-week summer course were both traditional college-age (late teens to early twenties) and non-traditional age student (thirties to fifties). Approximately 76 percent were female. Students demonstrated various lifestyles (e.g., gay, single-parent, living at home), socioeconomic statuses (e.g., middle-income, low income), employment (e.g., employed, unemployed, ex-military) and ethnicities. The structure of the environmental science course was consistent with the science education reform movement standards applied to K-12 …
"This Is Not A Politburo, But A Madhouse," The Post World War Ii Sovietization Of East Germany Up To The 1953 Worker's Uprising., Rush H. Taylor
"This Is Not A Politburo, But A Madhouse," The Post World War Ii Sovietization Of East Germany Up To The 1953 Worker's Uprising., Rush H. Taylor
USF Tampa Graduate Theses and Dissertations
The end of World War II brought forth many problems for the allies that had not been completely resolved by the victors. One of the most important was what to do with the defeated Germany. Within the first decade after World War II, the division of the former German superpower had become the front line of the Cold War between the United States and the Soviet Union. In the first eight years after the war (1945-53) East Germany, the Soviet controlled sector, quickly became 'Stalin's unwanted child' and was the first communist country to rebel against the imposed Soviet style …
An Ahp Framework For Balancing Efficiency And Equity In The United States Liver Transplantation System, Vijayachandran M. Veerachandran
An Ahp Framework For Balancing Efficiency And Equity In The United States Liver Transplantation System, Vijayachandran M. Veerachandran
USF Tampa Graduate Theses and Dissertations
ABSRACT: Liver transplantation and allocation has been a controversial issue in the United States for decades. One of the main concerns in the allocation system is the trade-off between the two main objectives, efficiency and equity. Unfortunately, it is difficult to reach consensus on how to develop allocation policies that aim at balancing efficiency and equity, among transplantation policy makers, administrators, transplant surgeons and transplant candidates.Our research identifies and classifies the outcomes of liver allocation into two major categories, efficiency and equity, that are, often times, conflicting. Previous researchers did not consider how to balance outcomes in these two categories. …
Linkages Between Environmental Conditions And Recreational King Mackerel Catch Off West-Central Florida, Carrie C. Wall
Linkages Between Environmental Conditions And Recreational King Mackerel Catch Off West-Central Florida, Carrie C. Wall
USF Tampa Graduate Theses and Dissertations
The objective of this study was to determine if fronts sustained up to three days will result in an aggregation of kingfish due to the anticipated accumulation of forage, increasing fishing success at these locations. Automated algorithms to detect frontal features in satellite-derived sea surface temperature, chlorophyll concentration, water clarity, and fluorescence images were successfully adapted for the coastal waters off west-central Florida. The surface ocean fronts were used to study the linkages between environmental conditions and recreational catch statistics of king mackerel (Scomberomorus cavalla) during 19 seasonal tournaments held in April to May and October to November of 2004 …
Herbivory By Leaf-Miners On Florida Scrub Oaks, Tatiana Cornelissen
Herbivory By Leaf-Miners On Florida Scrub Oaks, Tatiana Cornelissen
USF Tampa Graduate Theses and Dissertations
This study investigated effects of plant quality and natural enemies on the abundance and survivorship of several leaf miner species on Florida scrub oaks over several ecological scales. Three oak species (Quercus laevis, Q. geminata, and Q. myrtifolia) and four leafminer species (Acrocercops albinatella, Brachys tesselatus, Stilbosis quadripustulatus, and Cameraria sp. nova) were the main focus of five separate studies, addressing effects of bottom-up and top-down factors at regional, local, and individual scales. At the regional scale, it was observed that Cameraria sp. nova was aggregated into sites, and sites closer to …
Evaluating The Reliability Of Continuous Resistivity Profiling To Detect Submarine Groundwater Discharge In A Shallow Marine Environment: Sarasota Bay, Florida, Arnell Harrison
USF Tampa Graduate Theses and Dissertations
Submarine groundwater discharge (SGD) can be an important pathway for nutrients entering coastal systems. However SGD flow paths can be difficult to identify and flow volumes difficult to quantify. This study assesses whether geophysical techniques are potentially cost effective methods for detecting the presence or lack of SGD within an estuary environment found in Sarasota Bay, Florida. In this area, a rapid increase in urbanization has led to increased nitrogen loading into the bay, with some 10% of this loading attributed to SGD. Discharging groundwater is expected to be fresher and hence higher resistivity, than "background" surface waters. Thus resistivity …