Title from PDF of title page. / Document formatted into pages; contains 459 pages. / Dissertation originally submitted in HTML and can be accessed at http://www.lib.usf.edu/ETD-db/theses/available/etd-12032001-125326/unrestricted/index.htm / Thesis (Ph.D.)--University of South Florida, 2002. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: The virtual world exists as a dimension between concrete physical reality and abstract fictional fantasy. This cyber essence has become a place of commerce, social development, and educational pursuit. To build an understanding of the Kingdom of the Internet, the resulting case study sought to explore the community learning experiences of groups involved in an international online distance education program to create a tale of the process of a system. An assumption in this research was that the program under study was framed within a social learning context. Therefore, the recommendations and findings must be considered within this context and applied within similarly framed learning programs. The method of this study followed an input-process-output model with an added element of outcomes. / ABSTRACT: Participants completed a preliminary technology survey, locus of control instrument, self-regulated learner instrument and a learning styles inventory along with provided background information to form group input profiles. The process of the system was observed through the use of focus groups with the participants, process leaders and instructors as well as transcripts from discussion and chats. The group interaction, the site usage information and technical feedback all served as output information. The outcomes were measured through the use of a group effectiveness measure and instructor rating of final products. The result of the system study was a story of challenge and frustration, excitement and yearning, experimentation and comfort, good and best intentions. A portraiture approach was used as the vehicle for sharing the unique experiences of the international leaders during the first semester of learning. / ABSTRACT: As an essay on not only this particular system but also the dynamics of on-line research, the study illustrated the difficulties in virtual data collection. Major themes that were determined to be critical to virtual group social learning include: role differentiation, concise curriculum development, minimization of intimidation factors, and the initial group characteristic (input relationships). The wide focus of this study provided an overview of many topics that demand further research from both the lens of individual virtual learning experience and in depth exploration of various program components. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Title from PDF of title page. / Document formatted into pages; contains 84 pages. / Thesis (M.S.C.S.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: New generations of video surveillance systems are expected to possess a large-scale network of intelligent video cameras with built-in image processing capabilities. These systems need to be tethered for reasons of bandwidth and power requirements. To support economical installation of video cameras and to manage the huge volume of information flow in these networks, there is a need for new shared-medium daisy-chained physical and medium access control (bus arbitration) layer communication protocols. This thesis describes the design principles of Spatial reuse FireWire Protocol (SFP), a novel request/grant bus arbitration protocol, architected for an acyclic daisy-chained network topology. SFP is a new extension of the IEEE 1394b FireWire architecture. / ABSTRACT: SFP preserves the simple repeat path functionality of FireWire while offering two significant advantages: 1) SFP supports concurrent data transmissions over disjoint segments of the network (spatial reuse of bandwidth), which increases the effective throughput and 2) SFP provides support for priority traffic, which is necessary to handle real-time applications (like packet video), and mission critical applications (like event notifications between cameras) that have strict delay and jitter constraints. The delay and throughput performance of FireWire and SFP were evaluated using discrete-event queuing simulation models built with the CSIM-18 simulation library. Simulation results show that for a homogeneous traffic pattern SFP improves upon the throughput of IEEE 1394b by a factor of 2. For a traffic pattern typical of video surveillance applications, throughput increases by a factor of 7. / ABSTRACT: Simulation results demonstrate that IEEE 1394b asynchronous stream based packet transactions offer better delay performance than isochronous transactions for variable bit rate video like MPEG-2 and MPEG-4. SFP extends this observation by supporting priority traffic. QoS for packet video is provided in SFP by mapping individual asynchronous stream packets to the three priority classes. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Includes vita. / Title from PDF of title page. / Document formatted into pages; contains 111 pages. / Thesis (Ph.D.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: A large class of sequential decision making problems under uncertainty with multiple competing decision makers/agents can be modeled as stochastic games. Stochastic games having Markov properties are called Markov games or competitive Markov decision processes. This dissertation presents an approach to solve non cooperative stochastic games, in which each decision maker makes her/his own decision independently and each has an individual payoff function. In stochastic games, the environment is nonstationary and each agent's payoff is affected by joint decisions of all agents, which results in the conflict of interest among the decision makers. In this research, the theory of Markov decision processes (MDPs) is combined with the game theory to analyze the structure of Nash equilibrium for stochastic games. In particular, the Laurent series expansion technique is used to extend the results of discounted reward stochastic games to average reward stochastic games. / ABSTRACT: As a result, auxiliary matrix games are developed that have equivalent equilibrium points and values to a class of stochastic games that are irreducible and have average reward performance metric. R-learning is a well known machine learning algorithm that deals with average reward MDPs. The R-learning algorithm is extended to develop a Nash-R reinforcement learning algorithm for obtaining the equivalent auxiliary matrices. A convergence analysis of the Nash-R algorithm is developed from the study of the asymptotic behavior of its two time scale stochastic approximation scheme, and the stability of the associated ordinary differential equations (ODEs). The Nash-R learning algorithm is tested and then benchmarked with MDP based learning methods using a well known grid game. Subsequently, a real life application of stochastic games in deregulated power market is explored. / ABSTRACT: According to the current literature, Cournot, Bertrand, and Supply Function Equilibrium (SFEs) are the three primary equilibrium models that are used to evaluate the power market designs. SFE is more realistic for pool type power markets. However, for a complicated power system, the convex assumption for optimization problems is violated in most cases, which makes the problems more difficult to solve. The SFE concept in adopted in this research, and the generators' behaviors are modeled as a stochastic game instead of one shot game. The power market is considered to have features such as multi-settlement (bilateral, day-ahead market, spot markets and transmission congestion contracts), and demand elasticity. Such a market consisting of multiple competing suppliers (generators) is modeled as a competitive Markov decision processes and is studied using the Nash-R algorithm. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Title from PDF of title page. / Document formatted into pages; contains 72 pages. / Thesis (M.A.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: Archaeological investigations of Indian Key Historic State Park in the Florida Keys have uncovered a wide range of historical artifacts from throughout the nineteenth century that reveal how the site was reused and reoccupied through time. This thesis focuses on the glass component recovered from a house cistern complex (Feature F) and a warehouse (Features A and C) during the 1998 to 2002 field seasons. Glass artifacts range from a variety of bottle glass including alcohol bottles and proprietary medicines, to cut glass such as tumblers and decanters, to window glass. Feature F's analysis has shown that it maintained a primarily domestic nature despite having been reused by different groups at different times. Glass recovered from Feature F was primarily alcohol bottles, but large numbers of food bottles, medicines, and window glass was also found. The warehouse was used commercially and appears to have been continuously reused. / ABSTRACT: The most abundant item recovered from the warehouse was window glass; however large quantities of alcohol bottle fragments were also recovered. Also included in the glass analysis is a study of window glass dating techniques using glass thickness. By using a formula originally developed by Randall Moir (1982), and following an example set by Grant L. Day (2001), I was able to illustrate a process for dating nineteenth century window glass that is fairly accurate for determining periods of transition, addition, and reconstruction to buildings occupied over long time periods. Comparison of the glass from these two features using window glass dating formulas and other comparative evaluations as well as dating and functional analysis is revealing useful information about each of these structures individually, as well as about activity on the island as a whole. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Title from PDF of title page. / Document formatted into pages; contains 117 pages. / Thesis (M.A.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: Throughout the history of the United States, Americans customarily have given away their money, as well as their time to serve the common good. Americans will give "to build something, to fight something, or to save something" (Fink, 1990, p. 136). They make gifts to causes, or the societal problems represented by organizational missions, that are important to them. Individuals give not only to advance a common good, but also to receive private goods, or benefits that are internal, intangible, and in some cases, tangible (Steinberg, 1989). To create this feeling of reciprocity for prospective donors who have not actually benefited from the organization, charitable organizations attempt to attract these individuals by providing them with a benefit from the organization as a result of their donation of time or money. / ABSTRACT: A benefit many individuals are now receiving as a result of their donations is the personal association, real or perceived, with a celebrity (Wheeler, 2002). Preliminary empirical evidence suggests that celebrities are more effective as endorsers when they are personally connected to a cause not only because they help raise awareness for the cause, but they also have a perceived higher level of involvement in the organization. To date, most celebrity endorsement research remains in the field of marketing, while fund raising is more effective when discussed from the public relations perspective (Kelly, 1991, p. 163). However, there currently is no discipline-specific public relations theory that merges the concept of celebrity endorsement with the concepts of symmetrical and asymmetrical fund raising. / ABSTRACT: Fortunately, the interdisciplinary nature of public relations fosters the use of theoretical constructs from other areas of the social sciences, including marketing research (Werder, 2003). The mixed motive model of public relations (Dozier, L. Grunig, & J. Grunig, 1995) provides a framework when it is adapted to guide celebrity endorser fund raising success on a continuum between marketing and public relations. This study did not find support for the integrated communication model of celebrity endorsement fund raising since no significant differences existed between the different endorsers ability to increase the active seeking of information and acting on that information, information processing, and willingness to donate money and volunteer time for a charitable organization. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Includes vita. / Title from PDF of title page. / Document formatted into pages; contains 137 pages. / Thesis (Ph.D.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: The researcher examined the relationships between tuberous sclerosis, a multi-system genetic disorder, and school functioning through the use of a parent questionnaire and behavior rating scale. Information was gathered on the typical school experiences of children with tuberous sclerosis, including educational placement and services, behavioral functioning, parent involvement, and parent satisfaction. The results indicated that the majority of students with tuberous sclerosis are in special education and receiving related services. Three-quarters received one or more related services through the public school, and 30% received private related services paid for by their parents. Parent involvement was positively correlated with parent satisfaction, and negatively correlated with t-scores on the Withdrawn/Depressed subscale of the CBCL. / ABSTRACT: Parents of children receiving Autism services were generally less satisfied with their children's school experiences than other parents. Parent satisfaction was negatively correlated with the Attention Problems scale of the CBCL. Student age was negatively correlated with time in inclusion and with related services. This information forms the basis for a discussion of school psychologists' roles in the educational success of students with tuberous sclerosis and the critical areas towards which interventions should be directed. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Title from PDF of title page. / Document formatted into pages; contains 100 pages. / Thesis (M.A.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: This study investigates whether the social facilitation effect takes place when a person performs a computerized task that includes an animated intelligent agent (IA). The moderating effects of two individual differences, locus of control (LOC) and microcomputer playfulness (MCP), are tested for. It was proposed that an IA's presence would cause participants to exhibit this effect and that LOC and MCP would moderate a participant's arousal, measured as state anxiety, such that those possessing an internal LOC and those exhibiting high MCP would experience less arousal when performing computerized tasks with an IA present. Data was analyzed using a 2 (task difficulty) x 4 (intelligent agent) repeated measures MANCOVA. Most hypotheses are not supported, however MCP does appear to moderate arousal depending on the behavior of the IA. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Title from PDF of title page. / Document formatted into pages; contains 62 pages / Thesis (M.S.E.E.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: The GSM platform is a extremely successful wireless technology and an unprecedented story of global achievement. The GSM platform is growing and evolving and offers an expanded and feature-rich voice and data enabling services. General Packet Radio Service, (GPRS), will have a tremendous transmission rate, which will make a significant impact on most of the existing services. Additionally, GPRS stands ready for the introduction of new services as operators and users, both business and private, appreciate the capabilities and potential that GPRS provides. Services such as the Internet, videoconferencing and on-line shopping will be as smooth as talking on the phone. Moreover, the capability and ease of access to these services increase at work, at home or during travel. In this research the traffic channel of a GSM system was studied in detail and simulated in order to obtain a performance analysis. Matlab, software from Mathworks, was used for the simulation. / ABSTRACT: Both the forward and the reverse links of a GSM system were simulated. A flat fading model was used to model the channel. Signal to Noise Ratio, (SNR), was the primary metric that was varied during the simulation. All the building blocks for a traffic channel, including a Convolutional encoder, an Interleaver and a Modulator were coded in Matlab. Finally the GPRS system, which is an enhancement of the GSM system for data services was introduced. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Title from PDF of title page. / Document formatted into pages; contains 112 pages. / Thesis (M.S.C.S.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: Breast cancer is the second leading cause of cancer deaths among women in the United States and microcalcifications clusters are one of the most important indicators of breast disease. Computer methodologies help in the detection and differentiation between benign and malignant lesions and have the potential to improve radiologists' performance and breast cancer diagnosis significantly. A Computer-Aided Diagnosis (CAD-Dx) algorithm has been previously developed to assist radiologists in the diagnosis of mammographic clusters of calcifications with the modules: (a) detection of all calcification-like areas, (b) false-positive reduction and segmentation of the detected calcifications, (c) selection of morphological and distributional features and (d) classification of the clusters. Classification was based on an artificial neural network (ANN) with 14 input features and assigned a likelihood of malignancy to each cluster. / ABSTRACT: The purpose of this work was threefold: (a) optimize the existing algorithm and test on a large database, (b) rank classification features and select the best feature set, and (c) determine the impact of single and two-view feature estimation on classification and feature ranking. Classification performance was evaluated with the NevProp4 artificial neural network trained with the leave-one-out resampling technique. Sequential forward selection was used for feature selection and ranking. Mammograms from 136 patients, containing single or two views of a breast with calcification cluster were digitized at 60 microns and 16 bits per pixel. 260 regions of interest (ROI's) centered on calcification cluster were defined to build the single-view dataset. 100 of the 136 patients had a two-view mammogram which yielded 202 ROI's that formed the two-view dataset. Classification and feature selection were evaluated with both these datasets. / ABSTRACT: To decide on the optimal features for two-view feature estimation several combinations of CC and MLO view features were attempted. On the single-view dataset the classifier achieved an AZ =0.8891 with 88% sensitivity and 77% specificity at an operating point of 0.4; 12 features were selected as the most important. With the two-view dataset, the classifier achieved a higher performance with an AZ =0.9580 and sensitivity and specificity of 98% and 80% respectively at an operating point of 0.4; 10 features were selected as the most important. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

Title from PDF of title page. / Document formatted into pages; contains 124 pages. / Thesis (Ed.S.)--University of South Florida, 2003. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: This research study compared perceptions of family functioning among preadolescent children with behavior difficulties and their primary caregivers. Participants consisted of 29 caregiver-child dyads as well as each child's classroom teacher. Eligibility for the study was based on the child's placement within a self-contained Emotionally Handicapped (EH) or Severely Emotionally Disturbed (SED) classroom in one of three elementary schools within two west coast Florida counties. Data collection included teacher rating scales pertaining to the severity of each child's behavior and the presence of Callus Unemotional (CU) traits in addition to caregiver and child interviews tapping perceptions of family functioning. Results indicated that caregivers consistently viewed their families as more adaptive and cohesive than did children with a disruptive behavior disorder. / ABSTRACT: These findings are consistent with previous research showing a similar pattern among older adolescents with a disruptive behavior disorder. No relationship was not found between the child's perception of family functioning and CU traits, although it was noted that there was considerable restriction of range on CU traits. Overall, the results of this study contributes to the existing literature by demonstrating that preadolescents, like their older counterparts, also view their families as less adaptive and cohesive than do their caregivers. Limitations and directions for future research are discussed. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.