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Initial Validation Of Novel Performance-Based Measures: Mental Rotation And Psychomotor Ability, Philip Fatolitis
Initial Validation Of Novel Performance-Based Measures: Mental Rotation And Psychomotor Ability, Philip Fatolitis
Electronic Theses and Dissertations
Given the high-risk nature of military flight operations and the significant resources required to train U.S. Naval Aviation personnel, continual improvement is required in the selection process. In addition to general commissioning requirements and aeromedical standards, the U.S. Navy utilizes the Aviation Selection Test Battery (ASTB) to select commissioned aviation students. Although the ASTB has been a good predictor of aviation student performance in training, it was proposed that incremental improvement could be gained with the introduction of novel, computer administered performancebased measures: Block Rotation (BRT) and a Navy-developed Compensatory Tracking task. This work constituted an initial validation of the …
Tissue Engineering The Motoneuron To Muscle Segment Of The Stretch Reflex Arc Circuit Utilizing Micro-Fabrication, Interface Design And Defined Medium Formulation, Mainak Das
Electronic Theses and Dissertations
The stretch reflex circuit is one of the most primitive circuits of mammalian system and serves mainly to control the length of the muscle. It consists of four elements: the stretch sensor (muscle spindle/ intrafusal fiber lie parallel between extrafusal, contractile musculature), extrafusal muscle fiber, sensory neuron and motoneuron. The basic principle of the stretch reflex arc circuit is as follows: whenever there is a sudden stretch in a muscle, it needs to compensate back to its original length so as to prevent any kind of injury. It performs this compensation process using a simple negative feed back circuit called …
Design Of An Adaptive Autopilot For An Expendable Launch Vehicle, Clinton Plaisted
Design Of An Adaptive Autopilot For An Expendable Launch Vehicle, Clinton Plaisted
Electronic Theses and Dissertations
This study investigates the use of a Model Reference Adaptive Control (MRAC) direct approach to solve the attitude control problem of an Expendable Launch Vehicle (ELV) during its boost phase of flight. The adaptive autopilot design is based on Lyapunov Stability Theory and provides a useful means for controlling the ELV in the presence of environmental and dynamical uncertainties. Several different basis functions are employed to approximate the nonlinear parametric uncertainties in the system dynamics. The control system is designed so that the desire dresponse to a reference model would be tracked by the closed-loop system. The reference model is …
Diagnosing Anencephaly In Archaeology: A Comparative Analysis Of Nine Clinical Specimens From The Smithsonian Institution Nation, Stevie Mathews
Diagnosing Anencephaly In Archaeology: A Comparative Analysis Of Nine Clinical Specimens From The Smithsonian Institution Nation, Stevie Mathews
Electronic Theses and Dissertations
The inclusion of human fetal skeletons in the archaeological record can reveal much about past cultures' perception of life and death. The preservation of fetal remains in the archaeological record is a rarity, and the discovery of pathological skeletons is even rarer. A fetal skeleton from a Roman period cemetery (c. 31BC - 303AD) in the Dakhleh Oasis, Egypt, displays what are thought to be classic skeletal indicators of the neural tube defect, anencephaly. The published literature concerning the skeletal diagnosis of anencephaly is scant so in order to diagnose this individual it is pertinent to create a diagnostic standard. …
Bent Bones: The Pathological Assessment Of Two Fetal Skeletons From The Dakhleh Oasis, Egypt, Darcy Cope
Bent Bones: The Pathological Assessment Of Two Fetal Skeletons From The Dakhleh Oasis, Egypt, Darcy Cope
Electronic Theses and Dissertations
The present study evaluates two fetal individuals (B532 and B625) from the Kellis 2 cemetery (Roman period circa A.D. 50 A.D. 450), Dakhleh Oasis, Egypt, that display skeletal anomalies that may explain their death. Both individuals exhibit bowing of the long bones in addition to other skeletal deformities unique to each individual. To assess these pathologies a differential diagnosis based on the congenital occurrence of long bone bowing is developed. Long bone bowing is selected because it is the more prevalent abnormality in the paleopathological literature and the other abnormalities are not as easily identifiable in the literature. For the …
Haitian American Mothers' Health And Dietary Beliefs Concerning Their Infants, Daniel Schooler
Haitian American Mothers' Health And Dietary Beliefs Concerning Their Infants, Daniel Schooler
Electronic Theses and Dissertations
Studies on the effects of immigration are becoming more important as the number of immigrants into the United States continues to grow. This study was implemented in order to discover the infant feeding practices and beliefs of Haitians living in Central Florida. A food frequency card sort and interview were conducted with thirty-four Haitian mothers. Mothers were asked to identify which foods they fed their children. Foods pictured on the cards included a majority of Haitian staple foods, some of which are primary to the American diet as well. Low food feeding frequencies were generally attributed to lack of access …
Discerning Migration In The Archaeological Record: A Case Study At Chichã©N Itzã¡, Andrea Slusser
Discerning Migration In The Archaeological Record: A Case Study At Chichã©N Itzã¡, Andrea Slusser
Electronic Theses and Dissertations
Migration, as a theory to explain aspects in the archaeological record, has fallen out of favor in Mesoamerican archaeology, possibly due to a lack of a standard definition or description of migration. Migration as an explanation of change in Maya civilizations has been around since the 1950's and the culture-history era of American archaeology. Since the early 1990's, migration has been treated as a process, one that can be discerned in pre-literate cultures as well as historical ones. Models of the migration process are being developed and tested. One type of migration, elite dominance migration, is a particularly suitable process …
Collaborative Dispute Resolution In Superfund Enforcement:Does The Resolution Approach Vary By Community-Level Sociodemographic, Mary Collins
Electronic Theses and Dissertations
This research examines environmental dispute resolution as applied to Superfund site cleanup and how the use of collaborative dispute resolution approaches, in particular Alternative Dispute Resolution and Community Involvement, are related to a community's socioeconomic and demographic profile. It examines the sociodemographic characteristics of residents living in census tracts containing Superfund sites in relation to the type of dispute resolution technique used. I hypothesize that collaborative dispute resolution techniques, as opposed to traditional settlement and/or litigation, are less likely to occur in Superfund communities with high poverty levels and high minority populations than in those with low poverty levels and …
Living And Thriving In The Land Of Milk And Honey: Religion And The Success Of Mexican Immigrants To The United States, Jamie Dodge
Electronic Theses and Dissertations
This study examines the role of religion in promoting the success of Mexican immigrants, as measured by typical U.S. standards of success, including income, education, assets (such as homeownership), and health, including access to health insurance, controlling for age, education, gender, and ability to speak English. These measures are analyzed against various indicators of religiosity. The hypothesis driving the research is: religiosity increases an immigrant's success in the United States. This hypothesis was informed by social capital theory, and a distinction is made between bridging and bonding forms of social capital. The results show only a very weak correlation between …
The Impact Of Religiosity On Sexual Victimization Experiences And Reporting Behaviors Among College Students, Nicole Bauer
The Impact Of Religiosity On Sexual Victimization Experiences And Reporting Behaviors Among College Students, Nicole Bauer
Electronic Theses and Dissertations
This study investigated the relationship between religiosity of female college students and sexual victimization experiences. These experiences include the reporting behaviors that take place subsequent to an act of sexual victimization. The study utilized secondary data gathered from the forth wave of a longitudinal study funded by the National Institute of Justice between 1990 and 1995. The study used multidimensional levels of religiosity to analyze and to assess its impact on the sexual victimization experiences. Findings ascertained that certain behavioral measures of religiosity were consistently found to be a protective factor against sexual victimization. On the other hand, subjective measures …
Structure-Function Analysis Of The Drosophila Stubble Type Ii Transmembrane Serine Protease, Rachel Morgan
Structure-Function Analysis Of The Drosophila Stubble Type Ii Transmembrane Serine Protease, Rachel Morgan
Electronic Theses and Dissertations
Hormonally-triggered regulatory hierarchies play a major role in organismal development. Disruption of a single member of such a hierarchy can lead to irregular development and disease. Therefore, knowledge of the members involved and the mechanisms controlling signaling through such pathways is of great importance in understanding how resulting developmental defects occur. Type II transmembrane serine proteases (TTSPs) make up a family of cell surface-associated proteases that play important roles in the development and homeostasis of a number of mammalian tissues. Aberrant expression of TTSPs is linked to several human disorders, including deafness, heart and respiratory disease and cancer. However, the …
Cis-Regulatory Analysis Of The Pigment Cell Differentiation Gene Polyketide Synthase, David Rogers
Cis-Regulatory Analysis Of The Pigment Cell Differentiation Gene Polyketide Synthase, David Rogers
Electronic Theses and Dissertations
The analysis of Gene Regulatory Networks (GRNs) is essential to understanding the complete process of embryo development. Elucidating every gene regulatory circuit from maternal regulatory inputs all the way to the activation of differentiation gene batteries is an important step in increasing our understanding of developmental biology. In this work I study the cis-regulatory architecture of a pigment cell differentiation gene, polyketide synthase (SpPks) in the sea urchin Strongylocentrotus purpuratus. SpPks encodes an enzyme that is responsible for the biosynthesis of the sea urchin pigment echinochrome in larval pigment cells. The analysis of the promoter of a differentiation gene will …
Assessing And Modeling Mangrove Forest Dynamics Along The Temperate-Subtropical Ecotone In Eastern Florida, Susan Leitholf
Assessing And Modeling Mangrove Forest Dynamics Along The Temperate-Subtropical Ecotone In Eastern Florida, Susan Leitholf
Electronic Theses and Dissertations
Mangrove ecosystems are among the world's most endangered biomes; nearly one-half of the overall coverage is threatened by human activity, invasive species, and global climate change. Mangroves play an important ecosystem role through detrital production and by providing: fisheries and wildlife nursery habitat, shoreline protection, a sink for nutrients, carbon, and sediment. In addition to human activity, the Florida mangroves (Avicennia germinans, Laguncularia racemosa, and Rhizophora mangle) are being threatened by the invasive Brazilian pepper (Schinus terebinthifolius). This study was performed along a 261 km stretch of the east coast of Florida from Sebastian Inlet to the northern extent of …
Hatching Asynchrony Occurs As A Byproduct Of Maintaining Egg Viability, Robert Aldredge
Hatching Asynchrony Occurs As A Byproduct Of Maintaining Egg Viability, Robert Aldredge
Electronic Theses and Dissertations
For many organisms, embryonic development begins directly after an egg (ovum) has been fertilized by sperm; however, some organisms delay the onset of embryonic development until conditions are favorable for raising young. This delayed onset of development could occur by delaying implantation of fertilized ovum on the uterine wall, as seen in many mammals. Birds delay embryonic development by laying a set of fertilized ova over a period of consecutive days. These fertilized ova are protected from the ambient environment by an exterior shell, and it is in this shell outside of the female s body that embryonic development occurs, …
Recovery And Restoration Of The Seagrass Halodule Wrightii After Boat Propeller Scar Damage In A Pole-Troll Zone In Mosquito Lag, Katherine Grablow
Recovery And Restoration Of The Seagrass Halodule Wrightii After Boat Propeller Scar Damage In A Pole-Troll Zone In Mosquito Lag, Katherine Grablow
Electronic Theses and Dissertations
This study combined documentation of four boat propeller scar types in Halodule wrightii seagrass beds in Mosquito Lagoon, Florida with manipulative field experiments to document scar recovery times with and without restoration. Scar types ranged from the most severe scar type (Type 1) with trench formation which had no roots or shoots in the trench, to the least severe (Type 4) scars that had no depth, intact roots and shoots shorter than the surrounding canopy. For 110 measured existing scars, the frequency of each scar type was 56% for Type 1, 10% for Type 2, 7% for Type 3, and …
Growth And Survival Of Bacteria In Simulated Martian Conditions, Bonnie Berry
Growth And Survival Of Bacteria In Simulated Martian Conditions, Bonnie Berry
Electronic Theses and Dissertations
Escherichia coli and Serratia liquefaciens, two common microbial spacecraft contaminants known to replicate under low atmospheric pressures of 25 mb, were tested for growth and survival in simulated martian conditions. Stressors of high salinity, low temperature, and low pressure were screened alone and in combination to determine how they might affect microbial activity. Growth and survival of E. coli and S. liquefaciens under low temperatures (30, 20, 10, or 5 °C) with increasing concentrations (0, 5, 10, or 20 %) of three salts believed to be present on the surface of Mars (MgCl2, MgSO4, NaCl) were monitored over 7 d. …
The Distribution, Abundance, And Habitat Use Of The Big Cypress Fox Squirrel, (Sciurus Niger Avicennia)., Danielle Munim
The Distribution, Abundance, And Habitat Use Of The Big Cypress Fox Squirrel, (Sciurus Niger Avicennia)., Danielle Munim
Electronic Theses and Dissertations
Human population growth and development reduce the area and quality of natural communities and lead to a reduction of populations of the species associated with them. Certain species can be useful indicators or "focal species" for determining the quality of ecosystem remnants and the required management practices. Tree squirrels are good models for studies on the effects of fragmentation because they depend on mature forests. The Big Cypress fox squirrel, (Sciurus niger avicennia), a state-listed Threatened subspecies endemic to south Florida, appears sensitive to habitat fragmentation and fire regime. This research aims to assess the conservation status of the Big …
The Endocytic Protein Numb Regulates App Metabolism And Notch Signaling: Implications For Alzheimer's Disease, George Kyriazis
The Endocytic Protein Numb Regulates App Metabolism And Notch Signaling: Implications For Alzheimer's Disease, George Kyriazis
Electronic Theses and Dissertations
Increased production of amyloid beta (A-beta) peptide, via altered proteolytic cleavage of amyloid protein precursor (APP), and abnormalities in neuronal calcium homeostasis play central roles in the pathogenesis of Alzheimer's disease (AD). Notch1, a membrane receptor that controls cell fate decisions during development of the nervous system, has been linked to AD because it is a substrate for the gamma-secretase protein complex in which mutations cause early-onset inherited AD. Numb is an evolutionarily conserved endocytic adapter involved in the internalization of transmembrane receptors. Mammals produce four Numb isoforms that differ in two functional domains, a phosphotyrosine-binding domain (PTB) and a …
Security Design That Addresses Agency Conflicts And Information Asymmetry, Manish Tewari
Security Design That Addresses Agency Conflicts And Information Asymmetry, Manish Tewari
Electronic Theses and Dissertations
This study focuses on the role of structured derivative securities to meet diverse corporate financing objectives in the light of agency theory and asymmetric information. The focus is on the nonconvertible callable-puttable fixed-coupon bonds. The primary objective is to discern the marginal role of the put and put-deferred features in addressing the agency issues and asymmetric information. A sample of (159) securities issued over the period (1977-2005) are examined using Merton's (1974) structural contingent claims valuation model. The put option as well as the deferred put option incorporated in these securities is found to mitigate the asset substitution issue. It …
Perceived Organizational Forgiveness And Punitive Intent, Rommel Salvador
Perceived Organizational Forgiveness And Punitive Intent, Rommel Salvador
Electronic Theses and Dissertations
Although management scholars have examined various antecedents of punishment in the workplace, there has been scant research on how perceptions of the organizational context influence decision-making regarding punishment. Building on the work of Cameron and colleagues (Cameron, Bright, & Caza, 2004; Cameron & Caza, 2002), I propose that one's perceived organizational forgiveness - the perception of the extent to which the workplace is forgiving - is negatively related with one's punitive intent in response to ethical misconduct. In addition, I identify variables involving the disciplinary agent and the ethical misconduct itself as moderators of this relationship. In a lab study …
The Cost Of Being Me: Assessing The Consequences Of Compliance With Perceived Pressure To Assimilate In Work Roles, Tangela Phillips
The Cost Of Being Me: Assessing The Consequences Of Compliance With Perceived Pressure To Assimilate In Work Roles, Tangela Phillips
Electronic Theses and Dissertations
Acculturation refers to the process of change and adaptation that occurs between members of cultural groups, especially when one or more minority groups merge with the majority (Berry, 1980). In order to effectively manage diversity, organizational leaders are beginning to realize the importance of understanding the dynamics associated with cross cultural interactions in the workplace. This dissertation focuses on the acculturation mode of assimilation relative to the experiences of 101 African Americans employed in faculty and staff positions in colleges and universities located in the Southeastern United States. Specifically, the moderating role of ethnic identity on the relation between perceived …
An Integrated Model Of Work Climate, Maribeth Kuenzi
An Integrated Model Of Work Climate, Maribeth Kuenzi
Electronic Theses and Dissertations
Management scholars have become increasingly interested in the role of organizational context. As part of this trend, research on work climates has thrived. This contemporary climate research differs from traditional approaches by concentrating on facet-specific climate types like service or innovation, rather than general, global conceptualizations of climate. Consequently, the climate literature has become fragmented and disorderly. I seek to remedy this in my dissertation. Specifically, I propose and test an integrated model of work climate that examines both molar and facet-specific climates. Chapter 1 is a review of the organizational work climate literature. This review seeks to review, reorganize, …
Sensemaking In Information Systems: Toward A Sensemaking Inquiring System, James Parrish
Sensemaking In Information Systems: Toward A Sensemaking Inquiring System, James Parrish
Electronic Theses and Dissertations
Complexity and uncertainty have long been problems for organizations of all types. Organizational members do not do a very good job of dealing with the complexity and uncertainty as research shows that when faced with complex situations humans often turn to the same sources of information repeatedly (a practice that will eventually betray them), and/or reduce the amount of scanning that they do (Weick 1995; Boyd and Fulk 1996). Organizations often turn to information systems to help them deal with the complexity, but they often take a techno-centric view of knowledge that does not incorporate the human qualities needed for …
Understanding The Role Of Social Capital In Expertise Coordination In Information Systems Development (Isd) Teams, Shih-Chieh Hsu
Understanding The Role Of Social Capital In Expertise Coordination In Information Systems Development (Isd) Teams, Shih-Chieh Hsu
Electronic Theses and Dissertations
Information system development (ISD) project is a knowledge-intensive teamwork process which requires members to coordinate their expertise to generate the final outcome. Breakdown or coordination and insufficient knowledge integration have been reported as critical factors which lead to ISD project failure. Most existing coordination literature focus on the effect of administrative coordination mechanisms toward project performance which hints that more efforts are needed to understand expertise coordination and explore ways to improve it. Addressing the above issues, two studies in this dissertation attempt to understand expertise coordination within the IS development team based on social capital perspective. The first study, …
Essays In Outsourced Is Program Management, Neeraj Parolia
Essays In Outsourced Is Program Management, Neeraj Parolia
Electronic Theses and Dissertations
IS vendor organizations are increasingly using program management practices to manage complex projects (Gierra 2004). The move to program teams is due to the realization that the management of many client projects and their underlying dependencies requires teamwork among project managers from different projects (Cooke-Davies 2002; Ferratt et al. 2006; Sanghera 2007). With two separate studies, first we extend the team competence framework and utilize organizational learning theory to understand the antecedents and outcomes of teamwork behaviors. Empirical results from the first study indicated that teamwork behaviors within the program team were significantly related to an increase in team competencies …
Surface Engineering Of Gold Nanoparticles And Their Applications, Qiu Dai
Surface Engineering Of Gold Nanoparticles And Their Applications, Qiu Dai
Electronic Theses and Dissertations
Gold nanoparticles (AuNPs) with their unique sizes, shapes, and properties have generated much enthusiasm over the last two decades, and have been explored for many potential applications. The successful application of AuNPs depends critically on the ability to modify and functionalize their surface to provide stability, compatibility, and special chemical functionality. This dissertation is aimed at exploring the chemical synthesis and surface modification of AuNPs with the effort to (1) control the number of functional groups on the particle surface, and to (2) increase the colloidal stability at the physiological conditions. To control the functionality on the particle surface, a …
Impact Of Construction On Freeway Traffic Operations, Seema Jagtap
Impact Of Construction On Freeway Traffic Operations, Seema Jagtap
Electronic Theses and Dissertations
This study provides an insight into the impact of construction activities on traffic operations. Specifically, the topic of interest for this thesis is to study the impact of construction on traffic operations for construction projects on Interstate 4 from SR 434 to John Young Parkway, from SR 528 to SR 535, and from SR 482 to SR 528. These three projects were chosen because they were the only projects on Interstate 4 where both construction data and loop detector data were available for analysis. The data was collected by examining the Florida Department of Transportation daily inspection reports which had …
Hurricane Evacuation: Origin, Route And Destination, Vinayak Dixit
Hurricane Evacuation: Origin, Route And Destination, Vinayak Dixit
Electronic Theses and Dissertations
Recent natural disasters have highlighted the need to evacuate people as quickly as possible. During hurricane Rita in 2005, people were stuck in queue buildups and large scale congestions, due to improper use of capacity, planning and inadequate response to vehicle breakdown, flooding and accidents. Every minute is precious in situation of such disaster scenarios. Understanding evacuation demand loading is an essential part of any evacuation planning. One of the factors often understood to effect evacuation, but not modeled has been the effect of a previous hurricane. This has also been termed as the 'Katrina Effect', where, due to the …
Severity Analysis Of Driver Crash Involvements On Multilane High Speed Arterial Corridors, Alexis Nevarez-Pagan
Severity Analysis Of Driver Crash Involvements On Multilane High Speed Arterial Corridors, Alexis Nevarez-Pagan
Electronic Theses and Dissertations
Arterial roads constitute the majority of the centerline miles of the Florida State Highway System. Severe injury involvements on these roads account for a quarter of the total severe injuries reported statewide. This research focuses on driver injury severity analysis of statewide multilane high speed arterials using crash data for the years 2002 to 2004. The first goal is to test different ways of analyzing crash data (by road entity and crash types) and find the best method of driver injury severity analysis. A second goal is to find driver, vehicle, road and environment related factors that contribute to severe …
Evaluation Of Climatic And Ecohydrological Effects On Longwave Radiation And Evapotranspiration, Maria Rizou
Evaluation Of Climatic And Ecohydrological Effects On Longwave Radiation And Evapotranspiration, Maria Rizou
Electronic Theses and Dissertations
Modern tools, nontraditional datasets and a better understanding of the interaction between climate and ecohydrology are continuously being developed as today's society is in critical need for improving water management, predicting hydrometeorological hazards and forecasting future climate. In particular, the study of the intra- and inter-annual variations in grass productivity and evapotranspiration caused by variations in precipitation/soil moisture and other biophysical factors is of great significance due to their relation to future climatic changes. The research presented here falls in three parts. In the first part of the dissertation, a land use adaptable model, based on the superposition of the …