Physical Sciences and Mathematics Commons^™

Stochastic Modeling And Time-To-Event Analysis Of Voip Traffic, Imad Al Ajarmeh

College of Computing and Digital Media Dissertations

Voice over IP (VoIP) systems are gaining increased popularity due to the cost effectiveness, ease of management, and enhanced features and capabilities. Both enterprises and carriers are deploying VoIP systems to replace their TDM-based legacy voice networks. However, the lack of engineering models for VoIP systems has been realized by many researchers, especially for large-scale networks. The purpose of traffic engineering is to minimize call blocking probability and maximize resource utilization. The current traffic engineering models are inherited from the legacy PSTN world, and these models fall short from capturing the characteristics of new traffic patterns. The objective of this …

Titration Calorimetric Study Of The Interaction Among Calcium, Bile Salts, And The Tetracyclines, Karla Arias

College of Science and Health Theses and Dissertations

Tetracyclines are a group of antibiotics that are known to bind physiologically relevant metal ions, such as Ca2+, for antibacterial activity. The formation of the[ antibiotic-Ca2+l complex can interact with components in the gastrointestinal tract, including the bile salts, and reduce their absorption into the blood plasma after oral administration. Metal ion interactions between Ca2+ and tetracycline have been the focus of numerous studies while interactions with minocyclinc and tigccyclinc have been scarcely explored. Isothermal titration calorimetry (ITC) was employed to study the interaction of three members of the tetracycline family, tetracycline (TtC), minocyclinc (MC), and tigecycline (TgC), with …

High Resolution Observations Of 36 Ghz Class I Methanol Masers At Sites Of 6.7 Ghz Class Ii Methanol Masers In Star Forming Regions, Jared Hennen

College of Science and Health Theses and Dissertations

In this thesis we present high angular resolution data on 36 GHz Class I methanol masers associated with sites of 6.7 GHz Class II methanol masers. We observed twenty-three 36 GHz Class I methanol masers in seven star forming regions with the Jansky Very Large Array radio telescope. Our observations have made possible the first high angular resolution maps of 36 GHz masers in several star forming regions, and demonstrated cases where the morphology is highly suggestive of arcs and other structures known to be found at shock interfaces in such regions. The two classes of methanol masers are created …

H20 Maser Observations In W3 (Oh): A Comparison Of Two Epochs, Steven Merriman

College of Science and Health Theses and Dissertations

We present high resolution observations of 22 GHz H$_{2}$O masers toward the star forming region W3(OH), taken during two epochs using the Very Long Baseline Array telescope. We detected a total of 54 masers in observation BS198A, and 67 in BS198B, arranged in 3 groups. We determined that the observation BS198A took place during a period of quiescence, while BS198B was observed during a flaring period. We interpreted the maser morphology as lying on the eastern (Group 1) and western (Group 3) ends of an outflow, as well as near the outflow base (Group 2). We observed a velocity drift …

The Effects Of Diagrams And Relational Complexity On User Performance In Conditional Probability Problems In A Non-Learning Context, Vincent J. Kellen

College of Computing and Digital Media Dissertations

Many disciplines in everyday life depend on improved performance in conditional probability problems. Most adults struggle with conditional probability problems and several prior studies have shown participant accuracy is less than 50%. This study examined user performance when aided with computer-generated Venn and Euler type diagrams in a non-learning context. Despite the prevalence of research into diagrams and extensive research into conditional probability problem solving, this study is one of the only studies to apply theories of working memory to predict user performance in conditional probability problems with diagrams. Following relational complexity theory, this study manipulated problem complexity in computer …

Synthesis And Analysis Of Novel Copolymers Of Ring-Substituted 2-Phenyl-1, 1-Dicyanoethylenes And Styrene, Subha Ramnarayan

College of Science and Health Theses and Dissertations

Trisubstituted Ethylene (TSE) monomers, ring substituted 2-phenyl-1, 1-dicyanoethylenes are synthesized by knoevenagel condensation of ring substituted benzaldehyde with malononitrite, catalyzed by piperidine. TSE monomers are copolymerized with system by radical chain polymerization.

A Representation Of Selected Nonmanual Signals In American Sign Language, Jerry C. Schnepp

College of Computing and Digital Media Dissertations

Computer-generated three-dimensional animation holds great promise for synthesizing utterances in American Sign Language (ASL) that are not only grammatical, but believable by members of the Deaf community. Animation poses several challenges stemming from the massive amounts of data necessary to specify the movement of three-dimensional geometry, and there is no current system that facilitates the synthesis of nonmanual signals. However, the linguistics of ASL can aid in surmounting the challenge by providing structure and rules for organizing the data.

This work presents a first method for representing ASL linguistic and extralinguistic processes that involve the face. Any such representation must …

Inspiring Creative Solutions: An Experimental Investigation Of Three Ideation Methods In Generating Creative Product, Thomas P. Hanlon

College of Computing and Digital Media Dissertations

This study examines strategic, collaborative decision making with the goal of producing more creative solutions. Our experimental approach compares the results of three methods of ideation: manual free brainstorming, manual carousel brainstorming, and electronic carousel brainstorming (as implemented by a group support system). Our finding is that manual and electronic carousel brainstorming yield more creative solutions than does free brainstorming. However, there is little difference between the former methods. Both the manual and electronic forms of carousel brainstorming are equally effective at yielding creative solutions. Strategic, collaborative decision making, when well implemented, results in full consideration of the operational environment …

Improving Automated Requirements Trace Retrieval Through Term-Based Enhancement Strategies, Xuchang Zou

College of Computing and Digital Media Dissertations

Requirements traceability is concerned with managing and documenting the life of requirements. Its primary goal is to support critical software development activities such as evaluating whether a generated software system satisfies the specified set of requirements, checking that all requirements have been implemented by the end of the lifecycle, and analyzing the impact of proposed changes on the system. Various approaches for improving requirements traceability practices have been proposed in recent years. Automated traceability methods that utilize information retrieval (IR) techniques have been recognized to effectively support the trace generation and retrieval process. IR based approaches not only significantly reduce …