Digital Commons Network^™

Effectiveness And Kinetics Of Ferrate As A Disinfectant For Ballast Water, Andrea L. Jessen

Electronic Theses and Dissertations

The introduction of aquatic nuisance species (ANS) and bacterial pathogens from discharge of ballast water by sea-faring vessels is an ongoing problem that threatens ecosystems and human health. This study investigates the disinfecting capability of ferrate in a marine environment on several organisms listed in international standards for ballast water management. Organisms were grown in a saline solution and were treated with dosages of ferrate ranging from 0.25-5.0 mg/l. A ferrate dose of 5 mg/l resulted in almost complete kill for all organisms tested. Smaller dosages have also been very effective, particularly if all organic material from the nutrient broth …

Developing Emergency Preparedness Plans For Orlando International Airport (Mco) Using Microscopic Simulator Watsim, Daniel Dawson

Electronic Theses and Dissertations

Emergency preparedness typically involves the preparation of detailed plans that can be implemented in response to a variety of possible emergencies or disruptions to the transportation system. One shortcoming of past response plans was that they were based on only rudimentary traffic analysis or in many cases none at all. With the advances in traffic simulation during the last decade, it is now possible to model many traffic problems, such as emergency management, signal control and testing of Intelligent Transportation System technologies. These problems are difficult to solve using the traditional tools, which are based on analytical methods. Therefore, emergency …

Multiple View Geometry For Video Analysis And Post-Production, Xiaochun Cao

Electronic Theses and Dissertations

Multiple view geometry is the foundation of an important class of computer vision techniques for simultaneous recovery of camera motion and scene structure from a set of images. There are numerous important applications in this area. Examples include video post-production, scene reconstruction, registration, surveillance, tracking, and segmentation. In video post-production, which is the topic being addressed in this dissertation, computer analysis of the motion of the camera can replace the currently used manual methods for correctly aligning an artificially inserted object in a scene. However, existing single view methods typically require multiple vanishing points, and therefore would fail when only …

Modeling The Influences Of Personality Preferences On The Selection Of Instructional Strategies Inintelligent Tutoring Systems, Robert Sottilare

Electronic Theses and Dissertations

This thesis hypothesizes that a method for selecting instructional strategies (specifically media) based in part on a relationship between learning style preference and personality preference provides more relevant and understandable feedback to students and thereby higher learning effectiveness. This research investigates whether personality preferences are valid predictors of learning style preferences. Since learning style preferences are a key consideration in instructional strategies and instructional strategies are a key consideration in learning effectiveness, this thesis contributes to a greater understanding of the relationship between personality preferences and effective learning in intelligent tutoring systems (ITS). This research attempts to contribute to the …

Intrusion Detection In Wireless Sensor Networks, Hong Nhung Nguyen

Electronic Theses and Dissertations

There are several applications that use sensor motes and researchers continue to explore additional applications. For this particular application of detecting the movement of humans through the sensor field, a set of Berkley mica2 motes on TinyOS operating system is used. Different sensors such as pressure, light, and so on can be used to identify the presence of an intruder in the field. In our case, the light sensor is chosen for the detection. When an intruder crosses the monitored environment, the system detects the changes of the light values, and any significant change meaning that a change greater than …

Modeling, Simulation, And Visualization Of 3d Lung Dynamics, Anand Santhanam

Electronic Theses and Dissertations

Medical simulation has facilitated the understanding of complex biological phenomenon through its inherent explanatory power. It is a critical component for planning clinical interventions and analyzing its effect on a human subject. The success of medical simulation is evidenced by the fact that over one third of all medical schools in the United States augment their teaching curricula using patient simulators. Medical simulators present combat medics and emergency providers with video-based descriptions of patient symptoms along with step-by-step instructions on clinical procedures that alleviate the patient's condition. Recent advances in clinical imaging technology have led to an effective medical visualization …

Sub-Pixel Registration In Computational Imaging And Applications To Enhancement Of Maxillofacial Ct Data, Murat Balci

Electronic Theses and Dissertations

In computational imaging, data acquired by sampling the same scene or object at different times or from different orientations result in images in different coordinate systems. Registration is a crucial step in order to be able to compare, integrate and fuse the data obtained from different measurements. Tomography is the method of imaging a single plane or slice of an object. A Computed Tomography (CT) scan, also known as a CAT scan (Computed Axial Tomography scan), is a Helical Tomography, which traditionally produces a 2D image of the structures in a thin section of the body. It uses X-ray, which …

Wavelets In Real-Time Rendering, Weifeng Sun

Electronic Theses and Dissertations

Interactively simulating visual appearance of natural objects under natural illumination is a fundamental problem in computer graphics. 3D computer games, geometry modeling, training and simulation, electronic commerce, visualization, lighting design, digital libraries, geographical information systems, economic and medical image processing are typical candidate applications. Recent advances in graphics hardware have enabled real-time rasterization of complex scenes under artificial lighting environment. Meanwhile, pre-computation based soft shadow algorithms are proven effective under low-frequency lighting environment. Under the most practical yet popular all-frequency natural lighting environment, however, real-time rendering of dynamic scenes still remains a challenging problem. In this dissertation, we propose a …

Developing Microscopic Toll Plaza Model Using Paramics, Nezamuddin Nezamuddin

Electronic Theses and Dissertations

Simulation modeling is the most cost-effective way of studying real life transportation problems, either existing or anticipated, without disturbing the balance of the transportation system. There is a vast suite of simulation models available in market, ready to choose from macroscopic, mesoscopic, or microscopic in nature, to study different transportation system elements like freeways, highways, signalized and un-signalized intersections. However, most of these network simulation models, like PARAMICS, VISSIM, CORSIM … etc, do not come readily available with built in toll plaza models. On the other hand, many researchers have independently developed toll plaza models, which can only model an isolated …

Influence Map Methodology For Evaluating Systemic Safety Issues, Timothy Barth

Electronic Theses and Dissertations

Raising the bar in safety performance is a critical challenge for many organizations. Contributing factor taxonomies organize information on why accidents occur. Therefore, they are essential elements of accident investigations and safety reporting systems. Organizations must balance efforts to identify causes of specific accidents with efforts to evaluate systemic safety issues in order to become more proactive about improving safety. This research successfully addressed two problems: (1) limited methods and metrics exist to support the design of effective taxonomies, and (2) influence relationships between contributing factors are not explicitly modeled within a taxonomy. The primary result of the taxonomic relationship …

The Effectiveness Of A Specifically Designed Green Roof Stormwater Treatment System Irrigated With Recycled Stormwater Runoff To Achieve Pollutant Removal And Stormwater Volume Reduction, Michael Hardin

Electronic Theses and Dissertations

One of our greatest threats to surface-water quality is polluted stormwater runoff. In this research, investigated is the use of a green roof irrigated with recycled stormwater runoff to remove pollutants from stormwater runoff and reduce the volume of stormwater runoff leaving developed areas. The green roof properties of interest are the filtration and biological processes as well as the roof's ability to hold water and increase evapotranspiration, reducing the volume of stormwater runoff from the source. Because of the above mentioned reasons the experiment consists of a water quality analysis and a water budget done on several experimental chambers …

Iterchanging Discrete Event Simulationprocess Interaction Modelsusing The Web Ontology Language - Owl, Lee Lacy

Electronic Theses and Dissertations

Discrete event simulation development requires significant investments in time and resources. Descriptions of discrete event simulation models are associated with world views, including the process interaction orientation. Historically, these models have been encoded using high-level programming languages or special purpose, typically vendor-specific, simulation languages. These approaches complicate simulation model reuse and interchange. The current document-centric World Wide Web is evolving into a Semantic Web that communicates information using ontologies. The Web Ontology Language – OWL, was used to encode a Process Interaction Modeling Ontology for Discrete Event Simulations (PIMODES). The PIMODES ontology was developed using ontology engineering processes. Software was …

Engaging Vernacular Voices: Exploring Online Public Spheres Of Discourse For Everyday Citizens, Linda Schifino

Electronic Theses and Dissertations

This project considers the ways in which ordinary citizens engage in public discourse. This work is guided by what Michael Schudson calls the triumph of democratic sensibilities--the expectation that everybody owns public life. A politically active citizenry is, therefore, vital to a healthy democracy. Further, this inquiry assumes a rhetorical view of civic engagement, arguing that participation in a democracy is more than merely casting one's vote. Consequently, it is essential to identify and evaluate the vehicles by which individual citizens can take part in discursive civic life.

The challenge to healthy public spheres of discourse in contemporary American society …

Comparison Of The Hplc, Sherif Ismail Elshahawi

Electronic Theses and Dissertations

No abstract provided.

An Examination Of The Bio-Philosophical Literature On The Definition And Criteria Of Death: When Is Dead Dead And Why Some Donation After Cardiac Death Donors Are Not, Leslie Whetstine

Electronic Theses and Dissertations

Human fascination with transplantation has been portrayed in mythology and legend as well as in art and literature throughout history. It has both horrified and captivated our collective conscience and has progressed, in a relatively short time period, from science fiction to a modern accomplishment that can improve longevity and enhance quality of life.

The primary obstacle for transplantation is no longer scientific in nature but is predominantly one of supply and demand and carries with it attendant ethical concerns. Specific to this work is the question of whether a particular method of organ procurement known as Donation After Cardiac …

An Investigation Of The Chemistry And Antimalarial Activity Of The Marine Soft Coral Asterospicularia Randalli, S. Duane Burt

Electronic Theses and Dissertations

No abstract provided.

Epidemiological Models For Mutating Pathogens With Temporary Immunity, Neeta Singh

Electronic Theses and Dissertations

Significant progress has been made in understanding different scenarios for disease transmissions and behavior of epidemics in recent years. A considerable amount of work has been done in modeling the dynamics of diseases by systems of ordinary differential equations. But there are very few mathematical models that deal with the genetic mutations of a pathogen. In-fact, not much has been done to model the dynamics of mutations of pathogen explaining its effort to escape the host's immune defense system after it has infected the host. In this dissertation we develop an SIR model with variable infection age for the transmission …

An Applied Study Of Putnam's Social Capital Theory In Pontotoc County, Mississippi / By Kanin L. Reese, Kanin L. Reese

Electronic Theses and Dissertations

No abstract provided.

Electronic Cooling Of Power Amplifier Array Using Nanofluid Or Zigzag Fins, Kapil Gupta

Electronic Theses and Dissertations

No abstract provided.

And They Wonder Why Things Burn, Anna Baker

Electronic Theses and Dissertations

No abstract provided.

Mechanisms Of The Persistence Of Antibiotic Resistant Enteric Bacteria In Freshwater Wetland Environments, Andrekeus Lee

Electronic Theses and Dissertations

No abstract provided.

Sound Monitoring With Wireless Sensor Networks, Alex V. Jaramillo

Electronic Theses and Dissertations

No abstract provided.

Feeding Behavior Of Japanese Medaka As A Measure Of Neurological Activity For Marine Natural Products, Amanda J. Feldhaus

Electronic Theses and Dissertations

No abstract provided.

Investigating The Effectiveness Of Redundant Text And Animation In Multimedia Learning Environments, Shiau-Lung Chu

Electronic Theses and Dissertations

In multimedia learning environments, research suggests that simultaneous presentation of redundant text (i.e. identical narration and on-screen text) may inhibit learning when presented with animation at the same time. However, related studies are limited to testing with cause-and-effects content information (e.g., Moreno & Mayer, 1999, 2002). This study examined the effects of redundant text on learners' memory achievement and problem solving ability. The study replicated and extended prior research by using descriptive, rather than cause-and-effect content information. The primary research questions were (a) does redundant text improve learning performance if learners are presented with instructional material that addresses subject matter …

A Comparison Of Mentored And Non-Mentored Novice Elementary Principals In Respect To Job Satisfaction, Colleen Skinner

Electronic Theses and Dissertations

The purpose of this study was to determine if mentoring programs had an impact on job satisfaction for beginning elementary principals in the state of Florida. It also examined if the following factors impacted job satisfaction: (a) length of the mentoring program, (b) frequency of meetings, (c) selection process for the mentor, (d) the position of the mentor, or (e) age and gender of the beginning principal. The population for the study consisted of 108 elementary principals with more than six months and less than fours years of experience in the state of Florida. Twenty-four districts participated in the study, …

The Effect Of Cognitive Styles Upon The Completion Of A Visually-Oriented Component Of Online Instruction, Jia-Ling Lee

Electronic Theses and Dissertations

This study was designed to examine whether a person's prepositioned cognitive style influenced learning achievement in a visually-oriented task for an online learning environment in higher education. Field dependence-independence was used to identify individuals' cognitive styles. A true experimental study was conducted in the fall 2005 term at the University of Central Florida. This researcher followed Dwyer and Moore's research (1991, 2002) and divided learners into three groups (field dependent [FD], field neutral [FN], and the field independent [FI] students). Eighty-three preservice teachers participated in this study; the data from 52 of the FD and the FI participants were analyzed …

Teacher Retention In Brevard County, Florida K-12 Schools, Kenneth Winn

Electronic Theses and Dissertations

This descriptive study was designed to determine the extent to which selected self-reported practical and professional factors of teaching influenced teacher job satisfaction and retention within the K-12 public education system. The population of the study was 1321 certified teachers from a large Central Florida school district. The researcher developed the survey instrument based on the constructs of teaching known for motivating teachers to remain within the public school setting (Brunetti, 2001; Farkas, Johnson, & Folena, 2005). The researcher's survey was based on the studies of Perie (1997), Brunetti (2001), and Gary (2002). The researcher personally distributed 1321 surveys, respondent …

An Investigation Of Altruism And Personality Variables Amongbeginning Counseling Students, Laura Schmuldt

Electronic Theses and Dissertations

Altruism is loosely defined as a desire to help others as well as acts and behaviors towards that end, particularly when no expectation of personal gain or reward exists (Batson, Fultz, Schoenrade & Paduano, 1987). It seems likely that individuals who choose to pursue acareer in counseling might be doing so out of some altruistic interest; in other words a desire to come to the aid of others in distress. It has been noted as well that some individuals may enter the counseling profession based more on self-interest; for example, as "wounded healers" hoping to work on personal issues (Wheeler, …

The Kiosk Culture: Reconciling The Performance Support Paradox In The Postmodern Age Of Machines, Thomas Cavanagh

Electronic Theses and Dissertations

Do you remember the first time you used an Automatic Teller Machine (ATM)? Or a pay-at-the-pump gas station? Or an airline e-ticket kiosk? How did you know what to do? Although you never received any formal instruction in how to interact with the self-service technology, you were likely able to accomplish your task (e.g., withdrawing or depositing money) as successfully as an experienced user. However, not so long ago, to accomplish that same task, you needed the direct mediation of a service professional who had been trained how to use the required complex technology. What has changed? In short, the …

The Exchangeable Multinomial Modeling In Correlated Data, Yuanyuan Ding

Electronic Theses and Dissertations

No abstract provided.