Digital Commons Network^™

Designing Of Energy Efficient Indoor Environments Using A Localized Radial Basis Function Meshless Method, Victor Huayamave

Electronic Theses and Dissertations

Around the world, the energy over consumption issue has been one of the key socio-economic and political challenges, which has drastically worsened over the last few years. Over the years engineers and environmentalists have proposed several approaches to improve energy efficiency. One is to reduce energy demand by improving consumption habits and a second approach is to introduce the use of a "greener" concept by using biomaterials in a diverse and more efficient manner in engineering construction to create energy efficient environments. This work will investigate the effects of using "green" stabilized earth materials to provide and enhance thermal regulation …

A Method For Developing Churchmanian Knowledge Management Systems, Lars Linden

Electronic Theses and Dissertations

Some problems confronted by managers include ill-formulated wicked planning problems, a type of problem that is difficult to solve because, in part, it is difficult to know what the problem is. The Churchmanian Knowledge Management Systems (CKMS) (Richardson & Courtney, 2004) is comprised of design principles for aiding system designers, managers, and clients who make decisions pertaining to these ill-formulated wicked planning problems. Problemography theory is proposed as a method for developing a CKMS. The method aims to measure CKMS development by using development tools that enables stakeholders and theoreticians to clarify CKMS development. A study was conducted to test …

The Development Of A Human-Centric Fuzzy Mathematical Measure Of Human Engagement In Interactive Multimedia Systems And Applications, Chandre Butler

Electronic Theses and Dissertations

The utilization of fuzzy mathematical modeling for the quantification of the Human Engagement is an innovative approach within Interactive Multimedia applications (mainly video-based games designed to entertain or train participants on intended topics of interest) that can result in measurable and repeatable results. These results can then be used to generate a cogent Human Engagement definition. This research is designed to apply proven quantification techniques and Industrial/Systems Engineering methodologies to nontraditional environments such as Interactive Multimedia. The outcomes of this research will provide the foundation, initial steps and preliminary validation for the development of a systematic fuzzy theoretical model to …

Robust Dialog Management Through A Context-Centric Architecture, Victor C. Hung

Electronic Theses and Dissertations

This dissertation presents and evaluates a method of managing spoken dialog interactions with a robust attention to fulfilling the human user’s goals in the presence of speech recognition limitations. Assistive speech-based embodied conversation agents are computer-based entities that interact with humans to help accomplish a certain task or communicate information via spoken input and output. A challenging aspect of this task involves open dialog, where the user is free to converse in an unstructured manner. With this style of input, the machine’s ability to communicate may be hindered by poor reception of utterances, caused by a user’s inadequate command of …

Text Versus Verbal Real-Time Feedback During Simulation-Based Training Of Higher-Order Cognitive Skills, C L. Fiorella

Electronic Theses and Dissertations

A crucial component of instructional design for simulation-based training systems involves optimizing the presentation of complex material in order to maximize knowledge acquisition and application. One approach toward facilitating the learning of this complex information is to instantiate instructional strategies within the training systems themselves. However, there are few established guidelines in place which are meant specifically for real-time guidance strategies within simulation-based environments. Consequently, this study aims to apply findings from the literature on instructional information presentation to drive decisions for how to most effectively provide real-time feedback during training of simulated decision-making tasks. Research has shown that presenting …

An Interval Based Approach To Model Input Uncertainty In Discrete-Event Simulation, Ola Batarseh

Electronic Theses and Dissertations

The objective of this research is to increase the robustness of discrete-event simulation (DES) when input uncertainties associated models and parameters are present. Input uncertainties in simulation have different sources, including lack of data, conflicting information and beliefs, lack of introspection, measurement errors, and lack of information about dependency. A reliable solution is obtained from a simulation mechanism that accounts for these uncertainty components in simulation. An interval-based simulation (IBS) mechanism based on imprecise probabilities is proposed, where the statistical distribution parameters in simulation are intervals instead of precise real numbers. This approach incorporates variability and uncertainty in systems. In …

Processing, Optimization And Characterization Of Fire Retardant Polymer Nanocomposites, Jinfeng Zhuge

Electronic Theses and Dissertations

Fiber reinforced polymeric composites (FRPC) have superior physical and mechanical properties, such as high specific strength, light weight, and good fatigue and corrosion resistance. They have become competitive engineering materials to replace conventional metallic materials in many important sectors of industry such as aircraft, naval constructions, ships, buildings, transportation, electrical and electronics components, and offshore structures. However, since FRPC contain polymer matrix, the polymer composites and their structures are combustible. FRPC will degrade, decompose, and sometimes yield toxic gases at high temperature or subject to fire conditions. The objective of this study is to design and optimize fire retardant nanopaper …

Sexual Signal Evolution Outpaces Ecological Divergence During Electric Fish Species Radiation, Matthew E. Arnegard, Peter B. Mcintyre, Luke J. Harmon, Miriam L. Zelditch, William G. R. Crampton, Justin K. Davis, John P. Sullivan, Sébastien Lavoué, Carl D. Hopkins

Faculty Bibliography 2010s

Natural selection arising from resource competition and environmental heterogeneity can drive adaptive radiation. Ecological opportunity facilitates this process, resulting in rapid divergence of ecological traits in many celebrated radiations. In other cases, sexual selection is thought to fuel divergence in mating signals ahead of ecological divergence. Comparing divergence rates between naturally and sexually selected traits can offer insights into processes underlying species radiations, but to date such comparisons have been largely qualitative. Here, we quantitatively compare divergence rates for four traits in African mormyrid fishes, which use an electrical communication system with few extrinsic constraints on divergence. We demonstrate rapid …

Multistate Modeling Of Habitat Dynamics: Factors Affecting Florida Scrub Transition Probabilities, David R. Breininger, James D. Nichols, Brean W. Duncan, Eric D. Stolen, Geoffrey M. Carter, Danny K. Hunt, John H. Drese

Faculty Bibliography 2010s

Many ecosystems are influenced by disturbances that create specific successional states and habitat structures that species need to persist. Estimating transition probabilities between habitat states and modeling the factors that influence such transitions have many applications for investigating and managing disturbance-prone ecosystems. We identify the correspondence between multistate capture-recapture models and Markov models of habitat dynamics. We exploit this correspondence by fitting and comparing competing models of different ecological covariates affecting habitat transition probabilities in Florida scrub and flatwoods, a habitat important to many unique plants and animals. We subdivided a large scrub and flatwoods ecosystem along central Florida's Atlantic …

Systematic Identification Of Conserved Motif Modules In The Human Genome, Xiaohui Cai, Lin Hou, Naifang Su, Haiyan Hu, Minghua Deng, Xiaoman Li

Faculty Bibliography 2010s

Background: The identification of motif modules, groups of multiple motifs frequently occurring in DNA sequences, is one of the most important tasks necessary for annotating the human genome. Current approaches to identifying motif modules are often restricted to searches within promoter regions or rely on multiple genome alignments. However, the promoter regions only account for a limited number of locations where transcription factor binding sites can occur, and multiple genome alignments often cannot align binding sites with their true counterparts because of the short and degenerative nature of these transcription factor binding sites. Results: To identify motif modules systematically, we …

Angiogenesis: An Update And Potential Drug Approaches, Maen Abdelrahim, Santhi Konduri, Riyaz Basha, Philip A. Philip, Cheryl H. Baker

Faculty Bibliography 2010s

The therapeutic potential of targeting tumor endothelium and vascular supply is now widely recognized to treat different diseases. One such disease is cancer; where endothelial cells are actively proliferating to support the tumor growth. Solid tumors cannot grow beyond the size of a few millimeters without inducing the proliferation of endothelium and formation of new blood vessels. Hence it is crucial to search for new agents that selectively block tumor blood supply. These include anti-angiogenic molecules, vascular disrupting agents or endothelial disrupting agents. The anti-angiogenic molecules such as monoclonal antibodies and tyrosine kinase inhibitors disrupt endothelial cell survival mechanisms and …

The Development Of The University Of Central Florida Home Movie Archive And The Harris Rosen Collection, Michael Niedermeyer

Electronic Theses and Dissertations

Since the invention of the cinema, people have been taking home movies. The everincreasing popularity of this activity has produced a hundred years worth of amateur film culture which is in desperate need of preservation. As film archival and public history have coalesced in the past thirty years around the idea that every person’s history is important, home movies represent a way for those histories to be preserved and studied by communities and researchers alike. The University of Central Florida is in a perfect position to establish an archive of this nature, one that is specifically dedicated to acquiring, preserving, …

Phoneme-Based Video Indexing Using Phonetic Disparity Search, Carlos Leon Barth

Electronic Theses and Dissertations

This dissertation presents and evaluates a method to the video indexing problem by investigating a categorization method that transcribes audio content through Automatic Speech Recognition (ASR) combined with Dynamic Contextualization (DC), Phonetic Disparity Search (PDS) and Metaphone indexation. The suggested approach applies genome pattern matching algorithms with computational summarization to build a database infrastructure that provides an indexed summary of the original audio content. PDS complements the contextual phoneme indexing approach by optimizing topic seek performance and accuracy in large video content structures. A prototype was established to translate news broadcast video into text and phonemes automatically by using ASR …

Modeling And Simulation Of Soft Bodies, Jaruwan Mesit

Electronic Theses and Dissertations

As graphics and simulations become more realistic, techniques for approximating soft body objects, that is, non-solid objects such as liquids, gases, and cloth, are becoming increasingly common. The proposed generalized soft body method encompasses some specific cases of other existing models enabling simulation of a variety of soft body materials by parameter adjustment. This research presents a general method of soft body model and simulation in which parameters for body control, surface deformation, volume control, and gravitation, can be adjusted to simulate different types of soft bodies. In this method, the soft body mesh structure maintains configuration among surface points …

Growing Local: Anthropological Reflections On Current Challenges Facing Central Florida Organic Farmers, Cheney Swedlow

Electronic Theses and Dissertations

This thesis considers Central Florida's emerging local food movement from an anthropological perspective. Area farmers and organizations spearheading this movement and the benefits of purchasing and consuming locally grown food are ethnographically explored. Interviews with natural and organic farmers highlight the challenges affected farmers face in creating a sustainable local food movement in the greater Orlando region. Their motivations for farming organically and the counter-hegemonic tendencies inherent in this mode of cultivating are critically analyzed. Taken as a whole, this work addresses the limitations and opportunities afforded to farmers amid the popularity of local food consumption as a social movement. …

Death And Disengagement: A Critical Analysis Of The International Community's Intervention Effort In Darfur, Victor Hodges

Electronic Theses and Dissertations

This thesis seeks to analyze the international community's conflict management capabilities through its response to the Darfur crisis. Primarily, it aims to show through the lens of the Darfur crisis, which is widely accepted as the first genocide of the twenty-first century, that the international community has yet to develop a framework to collectively intervene in and resolve crimes against humanity. Additionally, this thesis will show the international community's recognition of their shortcomings through the gradual transformation of policies undertaken by several of its leading entities in response to the crisis. The research will pinpoint several major factors behind the …

An Exploration Of The Potentials And Limitations Of Adapting Traditional Text-Based Narrative To Interactive Technology, Said Jardaneh

Electronic Theses and Dissertations

Narrative is expressed in many forms, yet the reading of narrative through books may be unique in its transformative qualities. The medium of books has existed for thousands of years as a primary means of passing down and internalizing narrative from generation to generation. Are books now a dying medium in the face of ever-advancing technology in an increasingly fast-paced and technologically-dependent society? Technology now incorporates narrative into interactive environments in various ways often immersing the user in ever more realistic experiential scenarios. Yet, is something potentially lost with these advancements that can only be afforded through the time-tested method …

Fish Invaders At Gypsy Point: Katie And George Learn About Alternatives To Aquarium Dumping, Grace V. Nimnualrat, Anne Marie Wotkyns, George H. Zaleski, Linda Walters, Susan Zaleski

CEELAB Children's Books

While snorkeling, Katie and George come across a beautiful but unknown fish, so they snap a photo of it and take the photo to Dr. Linda at the University Marine Lab. She describes the unknown fish as a lionfish - a new, invasive species in western Atlantic waters that was most likely introduced by aquarium dumping (humans releasing unwanted plants and pets from aquarium tanks in to local waterways). Dr. Linda discusses the serious problems this fish and another invasive species, the green seaweed Caulerpa taxifolia, are causing to coral reefs and other aquatic habitats. She also explains better alternatives …

A Relationship Study Of Student Satisfaction With Learning Online And Cognitive Load, George Bradford

Electronic Theses and Dissertations

This study sought to explore if a relationship exists between cognitive load and student satisfaction with learning online. The study separates academic performance (a.k.a., 'learning') from cognitive load and satisfaction to better distinguish influences on cognition (from cognitive load) and motivation (from satisfaction). Considerations that remain critical to the field of instructional design, as they apply to learning online, were described and used to guide a review of the literature to find directions to fulfill the goal of this study. A survey was conducted and 1,401 students responded to an instrument that contained 24 items. Multiple analysis techniques found a …

Biosignal Processing Challenges In Emotion Recognitionfor Adaptive Learning, Aniket Vartak

Electronic Theses and Dissertations

User-centered computer based learning is an emerging field of interdisciplinary research. Research in diverse areas such as psychology, computer science, neuroscience and signal processing is making contributions the promise to take this field to the next level. Learning systems built using contributions from these fields could be used in actual training and education instead of just laboratory proof-of-concept. One of the important advances in this research is the detection and assessment of the cognitive and emotional state of the learner using such systems. This capability moves development beyond the use of traditional user performance metrics to include system intelligence measures …

Fathers' Language Influence On Their Six-Month-Old Infants' Vocalization During Free-Play, Lu Xia

Electronic Theses and Dissertations

Data for this study were derived from videotapes of 26 father-infant dyads, specifically from a five minute period of free-play. The first step was the creation of a literal transcription of the father-infant dyads interaction. Subsequently, nine variables of fathers' language characteristics and one infant characteristic were coded employing the literal transcriptions and observing the videotapes. The fathers' language variables were number of : (1) father utterances, (2) father words, (3) father contingent responses, (4) father teaching utterances, (5) father descriptive teaching utterances, (6) father directive teaching utterances - making commands, (7) father directive teaching utterance - asking questions, (8) …

Patterned Cell Cultures For High Throughput Studies Of Cell Electrophysiology And Drug Screening Applications, Anupama Natarajan

Electronic Theses and Dissertations

Over the last decade, the field of tissue and bio-engineering has seen an increase in the development of in vitro high-throughput hybrid systems that can be used to understand cell function and behavior at the cellular and tissue levels. These tools would have a wide array of applications including for implants, drug discovery, and toxicology, as well as for studying cell developmental behavior and as disease models. Currently, there are a limited number of efficient, functional drug screening assays in the pharmacology industry and studies of cell-surface interactions are complicated and invasive. Most cell physiology studies are performed using conventional …

Studies On A Novel Human Cardiospecific Transcription Factor And Its Involvement In Omi/Htra2 Mediated Cell Death, Meenakshi Puthucode Balakrishnan

Electronic Theses and Dissertations

Omi/HtrA2 is a mitochondrial serine protease that is known to translocate to the cytoplasm upon induction of apoptosis and to activate caspase-dependent and caspase-independent cell death. The molecular mechanism of Omi/HtrA2's function is not clear but involves degradation of specific substrates. These substrates include cytoplasmic, mitochondrial, as well as nuclear proteins. We have isolated a new Omi/HtrA2 interactor, the THAP5 protein. THAP5 is a fifth member of a large family of transcription factors that are involved in cell proliferation, apoptosis, cell cycle control, chromosome segregation, chromatin modification and transcriptional regulation. THAP5 is an approximately 50kDa nuclear protein, with a restricted …

A Blueprint For Planning And Designing Staged-Authentic Heritage Attractions In Small Island Nations, Earney F. Lasten

Electronic Theses and Dissertations

The purpose of this largely qualitative study was to develop a blueprint for planning and designing a staged-authentic heritage tourist attraction for small island nations. Data were gathered and analyzed in three phases. In Phase I, existing and potential supply, demand, and external variables associated with staged-authentic heritage attractions were identified, and a preliminary planning model and conceptual framework was developed. In Phase II, the model was refined. A blueprint containing seven major questions and 26 sequential steps was developed. In Phase III, the blueprint was tested using focus groups and an online tourist survey in the Caribbean region (Aruba) …

Development Of Optical Coherence Tomography For Tissue Diagnostics, Panomsak Meemon

Electronic Theses and Dissertations

Microvasculature can be found in almost every part of the human body, including the internal organs. Importantly, abnormal changes in microvasculature are usually related to pathological development of the tissue cells. Monitoring of changes in blood flow properties in microvasculature, therefore, provides useful diagnostic information about pathological conditions in biological tissues as exemplified in glaucoma, diabetes, age related macular degeneration, port wine stains, burn-depth, and potentially skin cancer. However, the capillary network is typically only one cell in wall thickness with 5 to 10 microns in diameter and located in the dermis region of skin. Therefore, a non-invasive flow imaging …

The Evolution Of The Swastika : From Symbol Of Peace To Tool Of Hate, Lindsey L. Turnbull

HIM 1990-2015

Few figures in the history of the Americas are surrounded with more colorful lore and acclamation than the Cuban politician, teacher, patriot, and poet Jose Marti. Among Marti's literary contributions, his Ismaelillo, a collection of fifteen poems published in 1882, claims prominence as both Marti's first book of poems and as a seminal Latin American text. Celebrated for its sincere communication of paternal love and lauded as the genesis of Hispanic literary modernism, Ismaelillo captures the longing of an exiled father separated from his son and homeland. Its language is at once evocative of classical Spanish literature and innovative, incorporating …

Acquisition And Transference Of Physics-Based Conceptual Knowledge: An Analysis Of Fourth-Grade Student's Ability, Ashton Dacus

HIM 1990-2015

Distressingly, at the end of the 2008-2009 school year, 53% of fifth-grade students scored the equivalence of a D or lower on Florida's standardized science assessment (NCLB School District and State Public Accountability Report, 2009). One possible way to adapt methods of science education that is becoming more popular is through the use of computer games, as numerous studies have shown positive correlations between the use of computer games and increased learning gains in science.

This thesis not only discusses previous researc concerning computer games as tools for science education but it also provides a description and the results of …

University Of Central Florida Factbooks 2009-2010, University Of Central Florida

Historical Fact Book and Enrollment

Historical fact book and enrollment data for the University of Central Florida.

Swine Flu, Drug Wars, And Riots: Media And Tourism In Oaxaca, Mexico, Joshua Crosby

Electronic Theses and Dissertations

This thesis examines how travelers evaluate and process mass media news stories about local events. Thanks to its colonial architecture, white sand beaches, and indigenous history, the southern Mexican state of Oaxaca receives millions of foreign and domestic visitors each year. Between 2006 and through 2009 Oaxaca has received a great deal of negative international media coverage, including stories of street riots, drug violence, and the fall out of the H1N1 flu virus. The overall impact of these unfavorable reports, and the resulting decline in the local tourism industry, has been predictable and severe. This thesis is based on anthropological …

Detecting Various Burial Scenarios In A Controlled Setting Using Ground-Penetrating Radar And Conductivity, Michael M. Martin

Electronic Theses and Dissertations

The use of geophysical tools to locate clandestine burials involving bodies has seen increasing popularity among forensic personnel. Often, these search methods are important to highlight certain areas where a body may or may not be located prior to utilizing invasive search techniques. Because of the success of these tools within real-life forensic searches, the use of controlled studies that monitor and detect cadavers over certain lengths of time have been increasingly utilized. However, these controlled studies have not monitored various burial scenarios that mimic real-life situations. This study focused on detecting and monitoring six burials containing pig carcasses used …