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The purpose of this study was to determine professor and student knowledge of, attitudes towards, and experiences with graduate level collaborative writing in Canadian universities. Data were gathered from professors and students in Engineering, Business, Education, Biology, English, and History. A mixed methods approach using two surveys and eighteen interviews was employed to explore four research questions. The surveys were analyzed deductively. Interviews were analyzed inductively and deductively. Results indicated that collaborative writing is practiced at the graduate level in a variety of ways. Professors and students described collaborative writing as mentorship, in the context of coursework, and as coauthorship for publication. In addition, a significant relationship was found between graduate students writing collaboratively and discipline. The relationship between professors assigning collaborative writing and discipline was also significant. Disciplinary differences were supported by and explored through interview data. Views in the academy seem to be shifting. Although solitary writing is the norm and highly valued in the humanities, participants in this study indicated an openness and desire to include collaborate writing in their graduate level experiences. In fields where collaborative writing is the norm, participants noted areas to address in order to increase its effectiveness. This study has implications in the areas of pedagogical change, technology, and the mandate of higher education.

Health Sciences Centre (HSC) in Winnipeg is the major healthcare facility serving Manitoba, Northwestern Ontario, and Nunavut. An evaluation of HSC’s adult surgical patient flow revealed that one major barrier to smooth flow was their Operating Room (OR) scheduling system. This thesis presents a new two-stage elective OR scheduling system for HSC, which generates weekly OR schedules that reduce artificial variability in order to facilitate smooth patient flow. The first stage reduces day-to-day variability while the second stage reduces variability occurring within a day. The scheduling processes in both stages are mathematically modelled as multi-objective optimization problems. An attempt was made to solve both models using lexicographic goal programming. However, this proved to be an unacceptable method for the second stage, so a new multi-objective genetic algorithm, Nondominated Sorting Genetic Algorithm II – Operating Room (NSGAII-OR), was developed. Results indicate that if the system is implemented at HSC, their surgical patient flow will likely improve.

The widespread use of personal multimedia-rich devices and multi-party video conferencing have made face-to-face communication among multiple users a promising feature. This thesis presents a multi-party conferencing solution with network coding naturally embedded. Our fundamental goal is to study if network coding brings benefits to multi-party conferencing. In this thesis, we first review an existing network coded solution for multi-party conferencing. Then, this solution is evaluated in our framework of evaluating a new transmission protocol for multi-party conferencing. Also, an investigation is set up to dive into the bottlenecks of this network coded solution. Next, an improved solution targeting conferencing services is proposed by tackling the bottlenecks of the existing solution. Based on our experiment results, it is found that network coding does bring benefits in the context of multi-party conferencing.

Little attention has been paid, in depth, to the relationship between fitness evaluation in evolutionary algorithms and reputation mechanisms in multi-agent systems, but if these could be related it opens the way for implementation of distributed evolutionary systems via multi-agent architectures. Our investigation concentrates on the effectiveness with which social selection, in the form of reputation, can replace direct fitness observation as the selection bias in an evolutionary multi-agent system. We do this in two stages: In the first, we implement a peer-to-peer, adaptive Genetic Algorithm (GA), in which agents act as individual GAs that, in turn, evolve dynamically themselves in real-time, using the traditional evolutionary operators of fitness-based selection, crossover and mutation. In the second stage, we replace the fitness-based selection operator with a reputation-based one, in which agents choose their mates based on the collective past experiences of themselves and their peers. Our investigation shows that this simple model of distributed reputation can be successful as the evolutionary drive in such a system, exhibiting practically identical performance and scalability to direct fitness observation. Further, we discuss the effect of noise (in the form of “defective” agents) in both models. We show that the reputation-based model is significantly better at identifying the defective agents, thus showing an increased level of resistance to noise.

The latest generation of fighter aircraft utilizes a 270Vdc power system [1]. Such high voltage DC power systems are difficult to protect with conventional circuit breakers because the current does not automatically go to zero twice per cycle during a fault like it does in an AC power system and thus arcing of the contacts is a problem. Solid state power controllers (SSPCs) are the solid state equivalent of a circuit breaker that do not arc and which can respond more rapidly to a fault than a mechanical breaker [2]. Present SSPCs are limited to lower voltages and currents by the available power semiconductors [8,9]. This dissertation presents design and experimental results for a SSPC that utilizes SiC power JFETs for the SSPC power switch to extend SSPC capability to higher voltages and currents in a space that is smaller than what is practically achievable with a Si power switch. The research started with the thermal analysis of the SSPCs power switch, which will guide the development of a SiC JFET multi-chip power module to be fabricated by Solid State Devices Inc. (SSDI) using JFETs from SiCED and/or Semisouth LLC. Multiple multi-chip power modules will be paralleled to make the SSPC switch. Fabricated devices were evaluated thermally both statically and dynamically and electrically both statically and dynamically. In addition to the SiC module research a detailed design of the high voltage SSPC control circuit capable of operating at 200andamp;ordm;C was completed including detailed analysis, modeling and simulations, detailed schematic diagrams and detailed drawings. Finally breadboards of selected control circuits were fabricated and tested to verify simulation results. Methods for testing SiC JFET devices under transient thermal conditions unique to the SSPC application was also developed.

This thesis is an A/R/Tographically-based investigation of my appropriative studio approach, resulting in a series of multi-media collage works entitled Tonight’s Programming, dealing with issues of militarism and commercialism in our everyday lives. Through research regarding appropriation in art history, examination of personal artistic influences, and regarding the work through the lenses of Artist, Researcher, and Teacher, I gained a deeper insight into not only my appropriative practices, but how these practices could be applied in the high school art classroom.

Session ID: SA-G4-3 / Joint 4th International Conference on Soft Computing and Intelligent Systems and 9th International Symposium on advanced Intelligent Systems, September 17-21, 2008, Nagoya University, Nagoya, Japan

Sensors with the capability of multi-signal acquisition at the “same” site and “same” time draw abundant attention throughout the academic society. However, designing of multi-signal sensors is a challenging process. The goal of the study is to explore the design theories and methodologies for multi-signal sensors with current device manufacturing technologies. To achieve this goal, this study strives to meet the following two objectives: (1) define general design principles for such sensors, and (2) develop demonstration prototypes to prove the effectiveness of the design principle. The study takes two signals acquisition as a vehicle without loss of generality. For Objective 1, this study proposes three general design principles for multi-signal sensors. The first design principle is to acquire multiple signals through a stem signal. The second principle is to design the structure so that one signal can be accurately inferred while another signal can be directly measured. The third principle is to design an integral structure that inherently acquires two signals. For objective 2, prototypes for the second and third principles were built to demonstrate the effectiveness of the design principles. Contributions of this study to the field of composite materials and sensor design include: (1) findings of the three design principles for multi-signal acquisition, (2) proof-of-concept construction/application of two prototype multi-signal devices (one for temperature and pressure, and the other for temperature and pH), and (3) discovery of the highly linear relationship between the temperature and electrical resistivity with a carbon nanotube and polymer composite within the temperature range from room temperature to approximately 70 Celsius degrees.