Digital Commons Network^™

Genetic Variation In Chrysopsis Floridana Small, The Endangered Florida Golden Aster, As Revealed By Random Amplification For Polymorphism Detection (Rapd), Laurie Lysle Walker Markham

USF Tampa Graduate Theses and Dissertations

Chrysopsis fioridana Small (Asteraceae) is a federally endangered plant endemic to the Tampa Bay area of west central Florida. It is confined to the sand pine scrub community, growing in open, sunny, and sandy areas or in disturbed areas at the edges of scrub. As a means ofassessing the genetic variability ofthis species, eight populations in Hillsborough County were compared with a seed stock collection housed at Bok Tower Gardens in Lake Wales using random amplification for polymorphism detection (RAPD). The objectives of this study were to (I) describe the overall genetic variation among and within populations and subpopulations of …

Stochastic Methods For Evaluating The Potential For Wetland Rehydration In Covered-Karst Terranes, Christian David Langevin

USF Tampa Graduate Theses and Dissertations

Augmentation with reclaimed water is one method for rehydrating wetlands damaged by water-level declines. Augmentation with reclaimed water has been proposed for rehydrating a wetland in the covered-karst terrane of west-central Florida. There is concern because reclaimed water may contain harmful agents that could flow from the wetland 1.4 km to a municipal wellfield that withdraws 30,000 m³/day. Estimates of groundwater flow velocities were calculated from the results of detailed field studies at the wetland. Results indicate that groundwater flows downward in the surficial aquifer at rates of 0.1 to 0.2 m/day and horizontally in the Floridan aquifer …

Differential Expression Of Homing-Associated Cell Adhesion Molecule, Very Late Antigen-4 And L-Selectin In Hematopoietic Progenitor Cell Trafficking Between The Marrow And Blood, Caroline Brigitte Fultz

USF Tampa Graduate Theses and Dissertations

This study addresses the hypothesis that the following cell adhesion molecules (CAMs): homing-associated cell adhesion molecule (HCAM), very late antigen-4 (VLA-4) and L-selectin play a role in the trafficking of hematopoietic progenitor cells (HPCs) between the bone marrow microenvironment and the peripheral circulation. In order to ascertain differences in CAM expression based on physiologic compartment, the expression of HCAM, VLA-4 or L-selectin per CD34⁺ myeloid progenitor cell was assessed between paired samples of blood and marrow. CAM expression was flow cytometrically quantitated in paired samples obtained from patients treated with mobilizing doses of granulocyte-colony stimulating factor (G-CSF) or from …

Acoustic And Perceptual Comparisons Of Imitative Prosody In Kindergartners With And Without Speech Disorders, Robin Harwell Rodriguez

USF Tampa Graduate Theses and Dissertations

This study investigated the affiliation of prosody with childhood articulation disorders. The Tennessee Test of Rhythm and Intonation Patterns, T-TRIP (Koike & Asp, 1981), was used to determine if kindergartners with linguistic (i.e. phonological) speech disorders, oral-motor speech disorders, or normal speech performed differently on imitative prosody tasks. Performance was assessed perceptually with T-TRIP overall and subtest scores, and acoustically with measurements of individual prosodic variables (amplitude, duration, and fundamental frequency) on selected items from the rhythm and intonation subtests. Perceptual and acoustic data were examined for characteristic patterns of performance by individual subjects and by groups.

A Kruskal-Wallis …

Knowledge-Guided Processing Of Magnetic Resonance Images Of The Brain, Matthew C. Clark

USF Tampa Graduate Theses and Dissertations

This dissertation presents a knowledge-guided expert system that is capable of applying routinesfor multispectral analysis, (un)supervised clustering, and basic image processing to automatically detect and segment brain tissue abnormalities, and then label glioblastoma-multiforme brain tumors in magnetic resonance volumes of the human brain. The magnetic resonance images used here consist of three feature images (T1-weighted, proton density, T2-weighted) and the system is designed to be independent of a particular scanning protocol. Separate, but contiguous 2D slices in the transaxial plane form a brain volume. This allows complete tumor volumes to be measured and if repeat scans are taken over time, …

Florida Red Tides From A Scientific And Public Information Perspective, Kristen M. Kusek

USF Tampa Graduate Theses and Dissertations

This thesis consists of a comprehensive historical review and evaluation of Florida red tide research and a multifaceted analysis of red tide coverage by the St. Petersburg Times from 1953 to 1997. Red tides caused by Gymnodinium breve along the Florida Gulf coast are riddled with complexity; scientists have been asking many of the same questions for nearly 50 years. Red tides also attract considerable media publicity. This thesis addressed the following: 1. What have scientists learned about Florida red tides since G. breve was identified in 1948?, and 2. How well was the issue covered by the newspaper media? …

The Influence Of Habitat Variation On Demography Of Blue Jays (Cyanociita Cristata) In South-Central Florida, Keith Allen Tarvin

USF Tampa Graduate Theses and Dissertations

Vertebrate populations rarely are homogeneous. Instead they exist as arrays of demographically variable subpopulations that are linked through dispersal. Variation in habitat quality is a major cause of demographic variability among subpopulations, but few studies have examined habitat-specific demography empirically. Here I present a detailed field study o f habitat-specific demography in Blue Jays (Cyanocitta cristata) that occupied a habitat mosaic landscape in south-central Florida. By measuring habitat-specific demographic parameters, including density, reproductive output, survival, and dispersal, I tested for the existence of population sources and sinks associated with different habitats, and the applicability ofa series ofhabitat selection models …

Social And Regional Observations Of Contemporary China : An Exploration Of The Human Element As It Relates To Modernization., Patricia A. Weeks

USF St. Petersburg campus Honors Program Theses (Undergraduate)

China has been working for nearly a century to bring about the modernization of what has been considered the world's oldest continuous major world civilization. The initial call for reform came from the late Emperor Guangxu in the late 1890s after he realized that China seriously lagged behind the world on most fronts. Europe and America had undergone the pains of modernization through the industrial revolution, a phenomenon that China chose to ignore, and were now reaping the benefits. Japan, a nation more closely related to China, had prospered by imitating the West and taking advantage of its technology and …