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Articles 1 - 30 of 132
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A Molecular Analysis Of Atlantic Menhaden (Brevoortia Tyrannus) Stock Structure, Abigail J. Lynch
A Molecular Analysis Of Atlantic Menhaden (Brevoortia Tyrannus) Stock Structure, Abigail J. Lynch
Dissertations, Theses, and Masters Projects
Atlantic menhaden is an ecologically and economically important species along the U.S. east coast. As a filter-feeder and key prey fish, it provides a critical link between primary production, phytoplankton, and larger piscivorous predators, such as striped bass, bluefish, and weakfish. The species is also the target of one of the largest commercial fisheries in the country. Menhaden are assessed as a single, coastwide stock, and recent assessments indicate that it is not overfished. However, there is very limited population genetics data to support the assumption of a single stock. Additionally, the recent consolidation of the fishery and localization of …
Twine-Top Modifications Of Sea-Scallop Dredges: Reducing Yellowtail-Flounder Bycatch, Kelli A. Milleville
Twine-Top Modifications Of Sea-Scallop Dredges: Reducing Yellowtail-Flounder Bycatch, Kelli A. Milleville
Dissertations, Theses, and Masters Projects
No abstract provided.
Academic Optimism Of Virginia High School Teachers: Its Relationship To Organizational Citizenship Behaviors And Student Achievement, Charles Allen Wagner
Academic Optimism Of Virginia High School Teachers: Its Relationship To Organizational Citizenship Behaviors And Student Achievement, Charles Allen Wagner
Dissertations, Theses, and Masters Projects
For decades, educational leaders have sought to identify school-level variables that have a positive and significant impact on student achievement despite the indelible effects of student socioeconomic status and family background. The purpose of this is study was to investigate the relationship between an emergent attitudinal construct---academic optimism---and its relationship to organizational citizenship behaviors of teachers and student achievement among a sample of Virginia public high schools.;A convenience sample of 36 public Virginia high schools serving students in grades 9-12 was used to collect survey data from full-time teachers and faculty during regularly-scheduled faculty meetings during the 2006-07 school year. …
A Versatile Imaging System For In Vivo Small Animal Research, Jianguo Qian
A Versatile Imaging System For In Vivo Small Animal Research, Jianguo Qian
Dissertations, Theses, and Masters Projects
In vivo small animal imaging has become an essential technique for molecular biology studies. However, requirements of spatial resolution, sensitivity and image quality are quite challenging for the development of small-animal imaging systems. The capabilities of the system are also significant for carrying out small animal imaging in a wide range of biological studies. The goal of this dissertation is to develop a high-performance imaging system that can readily meet a wide range of requirements for a variety of small animal imaging applications. Several achievements have been made in order to fulfill this goal.;To supplement our system for parallel-hole single …
Breaking The Mold: Sugar Ceramics And The Political Economy Of 18th Century St Eustatius, Derek Robert Miller
Breaking The Mold: Sugar Ceramics And The Political Economy Of 18th Century St Eustatius, Derek Robert Miller
Dissertations, Theses, and Masters Projects
No abstract provided.
The Religious Philosophy Of Richard M Nixon, Robert Benjamin Abel
The Religious Philosophy Of Richard M Nixon, Robert Benjamin Abel
Dissertations, Theses, and Masters Projects
No abstract provided.
Rise Of The "Indian Doctors": Charity Shaw And The Marketing Of Indian Medicine, Jason Peter Zieger
Rise Of The "Indian Doctors": Charity Shaw And The Marketing Of Indian Medicine, Jason Peter Zieger
Dissertations, Theses, and Masters Projects
No abstract provided.
Idiopathic Lesions And Visual Deficits In The American Lobster (Homarus Americanus) From Longs Island Sound, Ny, Christopher Robert Magel
Idiopathic Lesions And Visual Deficits In The American Lobster (Homarus Americanus) From Longs Island Sound, Ny, Christopher Robert Magel
Dissertations, Theses, and Masters Projects
In 1999 a mass mortality of the American lobster (Homarus americanus) occurred in western Long Island Sound (WLIS). Although the etiology remains unknown, warm bottom water temperature, hypoxia, heavy metal poisoning, and pesticides have been suggested as casual factors. Subsequently, lobsters from WLIS have continued to display symptoms of morbidity that include lethargy and cloudy grey eyes, caused by idiopathic lesions. The effects of these lesions on lobster vision are unknown. We therefore used electoretinography (ERG) to document changes in visual function in lobsters obtained from WLIS, while simultaneously using histology to quantify the extent of damage. Of the lobsters …
The Effects Of Preparing For Life As A University Student (Plus) On Student Achievement, Persistence, & Integration, Pascal P. Barreau
The Effects Of Preparing For Life As A University Student (Plus) On Student Achievement, Persistence, & Integration, Pascal P. Barreau
Dissertations, Theses, and Masters Projects
The purpose of this study was to investigate the impact of the Preparing for Life as a University Student (PLUS) transition program on student achievement, persistence, and integration. The mixed design study was conducted at a highly selective, coeducational, mid-sized university. Three cohort groups were combined as the treatment group and compared statistically to a closely matched sample of non-PLUS students. Focus groups with PLUS participants were also held.;Two research questions investigated whether there was a significant difference in academic achievement and persistence between PLUS participants and non-PLUS students after the first and second semesters. The remaining three research questions …
Influences Of Habitat Conditions On Submerged Aquatic Vegetation Development In The Chickahominy River And Other Virginia Tributaries Of The Chesapeake Bay, Erin C. Shields
Dissertations, Theses, and Masters Projects
Recently, there has been an expansion of submerged aquatic vegetation (SAV) in the tidal fresh and oligohaline portions of lower Chesapeake Bay tributaries. Much like the resurgence seen in the Potomac in the 1980’s, this spread of SAV in Virginia systems such as the Mattaponi, Pamunkey and Chickahominy seems to have been initiated by the introduction and spread of the invasive species Hydrilla verticillata, and appears to have been rapid. However the resurgence in the Piankatank has occurred in the absence of the introduction of this species. The factors that are influencing the growth of SAV in these tributary environments, …
The Impact Of Legislation And Litigation On The Education Of Students With Autism Spectrum Disorders, Selena Michelle Joy
The Impact Of Legislation And Litigation On The Education Of Students With Autism Spectrum Disorders, Selena Michelle Joy
Dissertations, Theses, and Masters Projects
The purposes of this study were to review and analyze legal issues related to the provision of education for students with Autism Spectrum Disorders (ASD). Specifically (1) an examination of federal laws that affect the education of students with ASD; and (2) case law pertaining to the education of students with ASD.;This study focused on the No Child Left Behind Act (2001) and the Individuals with Disabilities Education Improvement Act (2004) as well as the litigation related to the education of students with ASD adjudicated in the United States Courts of Appeals between January 2001 and December 2007. The legislation …
Variability In Geologic Framework And Shoreline Change: Assateague And Wallops Islands, Eastern Shore Of Virginia, Geoffrey L. Wikel
Variability In Geologic Framework And Shoreline Change: Assateague And Wallops Islands, Eastern Shore Of Virginia, Geoffrey L. Wikel
Dissertations, Theses, and Masters Projects
No abstract provided.
Vascular Flora Of The Totuskey Creek Watershed, Richmond County, Virginia, Christopher W. Johnstone
Vascular Flora Of The Totuskey Creek Watershed, Richmond County, Virginia, Christopher W. Johnstone
Dissertations, Theses, and Masters Projects
No abstract provided.
Exploration Of Gendered Patterns In Counseling Students' Perception Of Training Experiences, Yukio Fujikura
Exploration Of Gendered Patterns In Counseling Students' Perception Of Training Experiences, Yukio Fujikura
Dissertations, Theses, and Masters Projects
No abstract provided.
Blurring Boundaries: The Rorschach Idea In Twentieth-Century American Popular Culture, James Edward Rainey
Blurring Boundaries: The Rorschach Idea In Twentieth-Century American Popular Culture, James Edward Rainey
Dissertations, Theses, and Masters Projects
No abstract provided.
Sediment Transport And Erodibility In The York River Estuary: A Model Study, Jeffrey Paul Rinehimer
Sediment Transport And Erodibility In The York River Estuary: A Model Study, Jeffrey Paul Rinehimer
Dissertations, Theses, and Masters Projects
A cohesive sediment bed model was implemented in the Community Sediment Transport Modeling System (CSTMS) to examine processes influencing sediment erodibility and suspended sediment concentrations. Estimates of eroded mass from the sediment bed model were calibrated and verified with erosion chamber measurements from the York River, Virginia, a tidally-dominated environment. A constant erosion rate parameter combined with depth-varying critical shear stress was sufficient to model erosion observations of depth-limited sediment cores. Sensitivity of total eroded mass to seasonal variations in erodibility and changes in consolidation time scale was evaluated during spring-neap variations in bottom stresses. Differences were greatest during spring …
Effects Of Adaptive Foragers On The Diversity And Functioning Of Assembled Model Communities, William J. Tarantino
Effects Of Adaptive Foragers On The Diversity And Functioning Of Assembled Model Communities, William J. Tarantino
Dissertations, Theses, and Masters Projects
Previous research suggests that prey-switching behavior by consumers (adaptive foraging) contributes to the stability of food web networks and may help explain the apparent contradiction between the complexity of natural ecosystems and theory that suggests such complex systems should be unstable. However, no previous study has explored the consequences of adaptive foraging behavior on ecosystem processes (or `functioning'). I assembled communities from regional pools while varying searching efficiency, connectance, and the fraction of adaptive foragers in order to observe the effects these properties have on the diversity and functioning of the resultant communities. In general, pools with increased connectance, a …
Surface Study Of Niobium For Superconducting Radio Frequency (Srf) Accelerators, Hui Tian
Surface Study Of Niobium For Superconducting Radio Frequency (Srf) Accelerators, Hui Tian
Dissertations, Theses, and Masters Projects
Niobium rf superconductivity is a near-surface phenomenon because of the shallow rf penetration depth. Accordingly, the performance of Nb SRF accelerator cavities is strongly impacted by the topmost few nanometers interior surface, especially as impacted by the final surface conditioning treatments.;Surface topography impacts performance through local loss of superconductivit caused by intrusion of the rf magnetic field, which is enhanced at sharp protrusions. "Sharpness" comprises both vertical and lateral aspects, requiring development a new characterization approach beyond the familiar roughness measurements (Ra, Rz), which view only the vertical component. Stylus profilomety and atomic force microscopy traces view surface topography from …
Time-Resolved Magnetic Flux And Ac-Current Distributions In Superconducting Yttrium Barium Copper Oxide Thin Films And Multifilaments, Ran Yang
Dissertations, Theses, and Masters Projects
Time-resolved magneto-optical imaging (TRMOI) technique allows dynamic ac transport measurements on superconductors. The high time and spatial resolutions of the measurements also offer good quantitative data analysis of the MO images. YBa2Cu 3O7-delta (YBCO) was discovered as a high-temperature superconductor (HTSC) which has wide applications due to its high critical temperature of Tc = 91 K, and high critical current density Jc in the order of 106-7 Acm-2. Many of the applications require high ac current load and a high magnetic field. We study the interaction behavior of YBCO thin films in an ac transport current and a dc magnetic …
Nuclear Export Of The Thyroid Hormone Receptor [Alpha], Matthew Edward Grespin
Nuclear Export Of The Thyroid Hormone Receptor [Alpha], Matthew Edward Grespin
Dissertations, Theses, and Masters Projects
No abstract provided.
Effects Of Urban Development On Breeding Bird Diversity: The Role Of Diet And Migration, Elise Anne Larsen
Effects Of Urban Development On Breeding Bird Diversity: The Role Of Diet And Migration, Elise Anne Larsen
Dissertations, Theses, and Masters Projects
No abstract provided.
The Assistant Principal's Role In Special Education: An Inquiry Into The Supervision Of Special Education At The Building Level, Valerie Walton
The Assistant Principal's Role In Special Education: An Inquiry Into The Supervision Of Special Education At The Building Level, Valerie Walton
Dissertations, Theses, and Masters Projects
The purpose of this study was to examine the roles and responsibilities of elementary level assistant principals in the supervision of special education at the building level. Elementary assistant principals in Virginia (N = 219) were surveyed to identify delegated roles and responsibilities, perceptions of level of preparedness to perform assigned duties, and formal preparation for these duties. The survey addressed five leadership domains---Organization, Collaboration, Instruction, Program Evaluation, and Professional Development. Findings indicate that assistant principals fulfill organization duties more often than duties in the other domains, and felt more prepared for this area of responsibility as well. Knowledge and …
Age, Growth, And Demography Of The Sandbar Shark, Carcharhinus Plumbeus, Over Temporal And Spatial Scales, Jason G. Romine
Age, Growth, And Demography Of The Sandbar Shark, Carcharhinus Plumbeus, Over Temporal And Spatial Scales, Jason G. Romine
Dissertations, Theses, and Masters Projects
Numbers of sandbar sharks, Carcharhinus plumbeus, in the Northwest Atlantic have experienced drastic declines since the early 1980's reaching their minima during the early 1990's. Catch rates in the early 1990's were a mere 25% of those during the 1980's. Such drastic reductions in other fish stocks have often caused compensatory responses, most notably the cod stocks in the Northwest Atlantic. Compensatory responses in depressed populations may include decreased natural mortality, increased fecundity, or increased growth rates. Compensation for population fluctuations below carrying capacities have been recognized for many terrestrial and oceanic r-selected organisms, but few instances have been noted …
Plastic Capital: Wilmington, Delaware And The Deregulation Of Consumer Credit, Carolee Anne Klimchock
Plastic Capital: Wilmington, Delaware And The Deregulation Of Consumer Credit, Carolee Anne Klimchock
Dissertations, Theses, and Masters Projects
No abstract provided.
Education, Literacy And Ink Pots: Contested Identities In Post-Emancipation Barbados, Sean Edward Devlin
Education, Literacy And Ink Pots: Contested Identities In Post-Emancipation Barbados, Sean Edward Devlin
Dissertations, Theses, and Masters Projects
No abstract provided.
Negotiating The Companionate Ideal: Religion, Emotion, And Power In The Courtships Of Louisa Maxwell Holmes Cocke, Lindsay Mitchell Keiter
Negotiating The Companionate Ideal: Religion, Emotion, And Power In The Courtships Of Louisa Maxwell Holmes Cocke, Lindsay Mitchell Keiter
Dissertations, Theses, and Masters Projects
No abstract provided.
The Farthest Post: Fort Astoria, The Fur Trade, And Fortune On The Final Frontier Of The Pacific Northwest, Bronwyn M. Fletchall
The Farthest Post: Fort Astoria, The Fur Trade, And Fortune On The Final Frontier Of The Pacific Northwest, Bronwyn M. Fletchall
Dissertations, Theses, and Masters Projects
No abstract provided.
Nicotine Facilitates Trace Fear Conditioning In Normal And Fasd Rats Tested As Adolescents, Mary Elizabeth Levillain
Nicotine Facilitates Trace Fear Conditioning In Normal And Fasd Rats Tested As Adolescents, Mary Elizabeth Levillain
Dissertations, Theses, and Masters Projects
No abstract provided.
Nucleocytoplasmic Shuttling Of The Thyroid Hormone Receptor, Vincent R. Roggero
Nucleocytoplasmic Shuttling Of The Thyroid Hormone Receptor, Vincent R. Roggero
Dissertations, Theses, and Masters Projects
No abstract provided.
Broad Spatial Trends In Osprey Provisioning, Reproductive Success, And Population Growth Within Lower Chesapeake Bay, Kenneth Andrew Glass
Broad Spatial Trends In Osprey Provisioning, Reproductive Success, And Population Growth Within Lower Chesapeake Bay, Kenneth Andrew Glass
Dissertations, Theses, and Masters Projects
No abstract provided.