Software agents are well-suited to assisting users with routine, repetitive, and time-consuming tasks in various educational environments. In order to achieve complex tasks effectively, humans and agents sometimes need to work together. However, some issues in human agent interaction have not been solved properly, such as delegation, trust and privacy. The agent research community has focused on technologies for constructing autonomous agents and techniques for collaboration among agents. Little attention has been paid to supporting interactions between humans and agents. p* The objectives of this research are to investigate how easy it might be for a user to program his/her agent, how users behave when given the ability to program their agents, whether access to necessary help resources can be improved, and whether such a system can facilitate collaborative learning. Studying users concerns about their privacy and how an online learning environment can be built to protect users privacy are also interesting issues to us. <p>In this thesis two alternative systems were developed for programmable agents in which a human user can define a set of rules to direct an agents activities at execution time. The systems were built on top of a multi-agent collaborative learning environment that enables a user to program his or her agent to communicate with other agents and to monitor the activities of other users and their agents. These systems for end user programmable agents were evaluated and compared. The result demonstrated that an end-user programming environment is able to meet users individual needs on awareness information, facilitate the information exchange among the users, and enhance the communication between users within a virtual learning environment. This research provides a platform for investigating concerns over user privacy caused by agent programmability.

Post-harvest seedcoat darkening is a major problem in many pulses, including common bean (</i>Phaseolus vulgaris</i> L.). In some bean market classes, such as pinto, beans that have a darkened seedcoat are discounted in the market place as it is assumed that the beans are old and will be hard-to-cook (HTC). Pinto genotypes that darken more slowly than conventional pinto beans would be more desirable and have been identified in the bean breeding program at the University of Saskatchewan. <p>To study the slow-darkening trait, a quick, reliable, and inexpensive screening method that would not affect seed germination would be beneficial. Three potential protocols to accelerate seedcoat darkening were examined. The greenhouse protocol was conducted in the greenhouse by placing the bean seeds in polybags with a 1 cm2 piece of moistened felt. For the UV light protocol, bean seeds were placed 10 cm below an UV lamp which had a wavelength of 254 nm. For the cabinet protocol, bean seeds were placed in a cabinet set at 30¢ªC, 80% relative humidity, and full fluorescent lights. Color measurements were taken routinely using a Hunter Lab colorimeter. All three methods were successful in distinguishing darkening beans from slow-darkening beans although the UV light protocol was considered to be superior to the greenhouse and cabinet protocol as the UV light protocol was quick, consistent over years, and the most economical. Unlike the greenhouse and the cabinet protocols, the UV light protocol did not affect seed germination following accelerated darkening. <p>The stability of the slow-darkening trait was further investigated in genotype by environment (g x e) studies across different indoor and outdoor environments. In the g x e study across different field environments, it was found that prior to accelerated seedcoat darkening the g x e interaction was significant. Following accelerated seedcoat darkening, environment and genotype were both significant and g x e was not. The slow-darkening genotypes had lighter seedcoats than the darkening genotypes and those field sites that had more favorable weather had lighter seedcoats. For the g x e study across indoor and outdoor environments, when the genotypes were split into either slow-darkening or darkening, the g x e interaction was not significant and the slow-darkening genotypes had lighter seedcoats. <p>Genetic control of the slow darkening trait was determined. For crosses between slow-darkening genotypes and CDC Pintium, the F2 populations segregated 3 darkening : 1 slow-darkening with distinct bimodal distribution. This indicated that seedcoat darkening was controlled by a single gene and darkening was dominant over slow-darkening. For both slow-darkening by slow-darkening crosses, the F2 populations¡¯ L* values were unimodal, normal distributions, indicating there may be modifying genes for the slow-darkening trait.

The objective of this thesis was to develop a fast-response multifunctional MEMS (Micro Electro Mechanical Systems) sensor for the simultaneous measurement of in-cylinder pressure and temperature in an internal combustion (IC) engine. In a representative IC engine, the pressure and temperature can reach up to about 1.6 MPa and 580 °C, respectively, at the time of injection during the compression stroke. At the peak of the combustion process, the pressure and temperature near the cylinder wall can go beyond 6 MPa and 1000 °C, respectively. Failure of current membrane-based MEMS pressure sensors operating at high temperatures is mainly caused by cross-sensitivity to temperature, which affects the pressure readout. In addition, the slow thermal response of temperature sensors used for such a dynamic application makes real-time sensing within a combustion engine very challenging. While numerous approaches have been taken to address these issues, no MEMS sensor has yet been reported that can carry out real-time measurements of in-cylinder pressure and temperature. The operation of the sensor proposed in this Thesis is based on a new non-planar and flexible multifunctional membrane, which responds to both pressure and temperature variations at the same time. The new design draws from standard membrane-based pressure and thermostatic-based temperature MEMS sensing principles to output two capacitance values. A numerical processing scheme uses these values to create a characteristic sensing plot which then serves to decouple the effects of pressure and temperature variations. This sensing scheme eliminates the effect of cross-sensitivity at high temperatures, while providing a short thermal response time. Thermal, mechanical and electrical aspects of the sensor performance were modeled. First, a semi-analytical thermo-mechanical model, based on classic beam theory, was tailored to the shape of the multifunctional membrane to determine the sensor’s response to pressure and temperature loading. ANSYS® software was used to verify this semi-analytical model against finite element simulations. Then the model was then used to calculate the capacitive outputs of the multifunctional MEMS sensor subjected to in-cylinder pressure and temperature loading during a complete cycle of operation of a typical IC engine as well as to optimize the sensor specifications. Several prototypes of the new sensing mechanism fabricated using the PolyMUMPs® foundry process were tested to verify its thermal behavior up to 125 °C. The experiments were performed using a ceramic heater mounted on a probe station with the device connected to a precision LCR-meter for capacitive readouts. Experimental results show good agreement of the temperature response of the sensor with the ANSYS® finite element simulations. Further simulations of the pressure and temperature response of different configurations of the multifunctional MEMS sensor were carried out. The simulations were performed on an array of 4200 multifunctional devices, each featuring a 0.5 µm thick silicon carbide membrane with an area of 25×25 µm2, connected in parallel shows that the optimized sensor system can provide an average sensitivity to pressure of up to 1.55 fF/KPa (over a pressure range of 0.1-6 MPa) and an average sensitivity to temperature of about 4.62 fF/°C (over a temperature range of 160-1000 °C) with a chip area of approximately 4.5 mm2. Assuming that the accompanying electronics can meaningfully measure a minimum capacitance change of 1 fF, this optimized sensor configuration has the potential to sense a minimum pressure change of less than 1 KPa and a minimum temperature change of less than 0.35 °C over the entire working range of the representative IC engine indicated above. In summary, the new developed multifunctional MEMS sensor is capable of measuring temperature and pressure simultaneously. The unique design of the membrane of the sensor minimizes the effect of cross-sensitivity to temperature of current MEMS pressure sensors and promises a short thermal response time. When materials such as silicon carbide are used for its fabrication, the new sensor may be used for real-time measurement of in-cylinder pressure and temperature in IC engines. Furthermore, a systematic optimization process is utilized to arrive at an optimum sensor design based on both geometry and properties of the sensor fabrication materials. This optimization process can also be used to accommodate other sensor configurations depending on the pressure and temperature ranges being targeted.

Social factors influence drug abuse in adolescents; this is partially attributed to peer pressure in humans. Similarly, using rodent models, some research suggests that social housing condition can influence rodents' drug taking behavior. Despite this, few studies have examined the role that intoxicated peers have on drug-naive cage-mates. This dissertation examined how social environment affects opioid sensitivity and hormone production. This was accomplished by comparing the opioid sensitivity of mice housed in mixed cages (some animals received opioids and some were drug-naive) to cages where all the mice were treated with the same drug (all saline or all morphine). These studies identified an adolescent-specific vulnerability to social environment-induced alteration of morphine sensitivity. Interaction with drug-intoxicated cage-mates enhanced locomotor sensitivity in previously drug-naive males and altered their production of testosterone. Conversely, interaction of morphine experienced mice with drug-naive cage-mates afforded protection from the rewarding properties of morphine. In other words, morphine-treated mice housed with drug-naive cage-mates demonstrated attenuated reward compared to morphine-treated mice housed with other morphine-treated mice. In addition, part of the neurobiological basis of the social-environment effect was identified. Antagonism of V1b receptors decreased morphine reward in morphine-treated mice housed only with other morphine-treated mice. These results suggest a role of vasopressin in the peer influence on drug sensitivity observed in adolescents. This body of work further elucidates the role of peer influence on opioid sensitivity. Future studies should further reveal the role of healthy peer relationships and should aid in combating drug abuse in this at-risk demographic.

Software agents are well-suited to assisting users with routine, repetitive, and time-consuming tasks in various educational environments. In order to achieve complex tasks effectively, humans and agents sometimes need to work together. However, some issues in human agent interaction have not been solved properly, such as delegation, trust and privacy. The agent research community has focused on technologies for constructing autonomous agents and techniques for collaboration among agents. Little attention has been paid to supporting interactions between humans and agents. p* The objectives of this research are to investigate how easy it might be for a user to program his/her agent, how users behave when given the ability to program their agents, whether access to necessary help resources can be improved, and whether such a system can facilitate collaborative learning. Studying users concerns about their privacy and how an online learning environment can be built to protect users privacy are also interesting issues to us. <p>In this thesis two alternative systems were developed for programmable agents in which a human user can define a set of rules to direct an agents activities at execution time. The systems were built on top of a multi-agent collaborative learning environment that enables a user to program his or her agent to communicate with other agents and to monitor the activities of other users and their agents. These systems for end user programmable agents were evaluated and compared. The result demonstrated that an end-user programming environment is able to meet users individual needs on awareness information, facilitate the information exchange among the users, and enhance the communication between users within a virtual learning environment. This research provides a platform for investigating concerns over user privacy caused by agent programmability.

Organizational restructuring and reform in the health care system has impacted the ability of Clinical Nurses (CNs) to participate in and influence decision making that affects the delivery of patient care. Clinical nurses maintain and advocate a professional responsibility to practice according to specific standards, policies and procedures, and to meet the needs of the patient and family members. Clinical nurses participation in decision making at the patient, unit and administrative levels recognizes their abilities and skills as professionals; however, CNs continue to experience a limited role in the decision making and control over nursing practice at all of these levels.<p> The literature overview examines control over nursing practice including how this complex concept is difficult to define and undervalued within the CNs professional practice environment. It is evident in the literature that control over nursing practice is important to the CNs professional practice environment ultimately affecting job satisfaction, recruitment/retention, and patient outcomes. Control over nursing practice is explored in relation to internal and external factors that affect the professionalism of the CN. Internal factors are those that are more closely related to the CNs scope of practice and include professionalism (influence in decision making including policies and procedures, collegial relations, and professional development), CN satisfaction (workload, scheduling, health, safety and security concerns, supportive management, and opportunities for leadership), safe quality patient care (staffing, education, and specialization), empowerment, and autonomy. The external factors are outside the immediate scope of the CN yet directly and indirectly affect the CNs control over nursing practice including health care restructuring, organizational influence, work environment models (shared governance and magnet hospital environments), and nursing leadership. <p>This study provided CNs employed in the provincial hospitals in Saskatchewan an opportunity and a voice to share their perceptions of who governs their professional practice environment including control over nursing practice. This mixed method descriptive survey design used Hess Index of Professional Nursing Governance ([IPNG], 1998) along with five questions geared to elicit qualitative responses to study the perceptions of who governs CNs professional practice environment including control over nursing practice in provincial hospitals in Saskatchewan. Section one of the IPNG contains a demographic section including information on age, gender, nursing education, and employment information. The second section of IPNG consists of 86 questions that are further divided into six subscales asking respondents to indicate who has control over nursing practice in a number of areas within their particular health facility. The six subscales include Subscale I Professional control relating to who has control over professional practice in the organization, Subscale II Organizational influence examining who participates in governance activities within the organization, Subscale III Organizational recognition identifying who controls nursing personnel and related structures, Subscale IV Facilitating structures indicating who determines and participates in governance decisions within the organization, Subscale V Liaison exploring who influences the resources that support professional practice, and Subscale VI Alignment identifying who sets and negotiates conflict within the organization. These questions are rated on a 5 point Likert scale according to the following response possibilities: 5 = staff nurses only; 4 = primarily staff nurses with some nursing management/administration input; 3 = equally shared by staff nurses and nursing management/administration; 2 = primarily nursing management/administration with some staff nurse input; 1 = nursing management/administration only. Section three the qualitative questions, contained one closed ended and four open ended questions that provided CNs an opportunity to share a more personal perspective regarding their perceptions of control over nursing practice in their work environment. These questions included: 1. What does control over nursing practice mean to you? 2. How could control over your practice be changed significantly? 3. Do you feel you have enough control over practice in your work environment? 4. What limits your control over practice in an area that interests you? and What enables your control over practice in an area that interests you? <p>The total population of 1804 CNs in provincial hospitals in Saskatchewan was invited to participate in this study. One hundred and seventy two CNs (9.53%) responded to this study, including 118 from Saskatoon (11.8%) and 54 from Regina (6.7%). The descriptive data provides data on gender and average age of CNs that is similar to Canadian Institute for Health Information ([CIHI], 2006) and Health Canada (2006a). A greater number of CN respondents indicated their basic nursing education was a diploma and more CNs had attained a baccalaureate degree as their highest level of education when compared to the CIHI data. Twice as many CNs indicated having specialty certification and a higher number were working full time in comparison to the CIHI data. The quantitative data obtained from the IPNG subscales indicates CNs perceive limited control over nursing practice and this is by in large held mainly by nursing management/administration (1) and nursing management with some staff nurse input (2). The subscale results include Professional control (M = 1.72), Organizational influence (m = 2.13), Organizational recognition (M = 1.73), Facilitating structures (M = 1.82), Liaison (M = 2.1), and Alignment (M = 2.1). Overall, the results from the IPNG subscales provide scores of less than 3 on the Likert scale indicating CNs perceive limited control over nursing practice in their professional practice environment. There were no significant differences within the provincial hospitals or between the health regions regarding CNs perceptions of control over nursing practice. In their qualitative responses, CNs provided information related to both the internal and external factors as discussed in Chapter Two. Clinical nurses indicate they face many challenges regarding control over practice including lack of influence in decision making in issues related to policy and procedure, quality patient care, staffing ratios, self-scheduling, and educational opportunities. They also identified external factors affecting their control over nursing practice including a lack of support by management in relation to decision making, a lack of provision of and access to an adequacy of resources, and a lack of communication and collaboration. Many CNs indicated their only influence in decision making was related to direct patient care. Clinical nurses described that being valued, supported, and recognized for their experience and education in decision making positively affects control over nursing practice and more specifically, quality patient care. <p> Study results offer government officials, practitioners, regulatory bodies, researchers, administrators, educators, nurses, the public, professional association, employers, unions, and any other stakeholders information that provides an opportunity to increase their awareness and understanding of the impact that control over nursing practice has for CNs in their practice environment. If stakeholders are serious in their attempts to recognize CNs concerns regarding control over nursing practice in their work environment, the results from this study will provide information facilitating change in the CNs control over nursing practice. Ultimately, this affects the CNs professionalism and ability to provide quality patient care.

VEMap (virtual emotion map) can be seen as an advanced application of virtual environment (VE) technology to aid with design activities in architecture and urban planning, which can assist designers to understand users’ opinions. The aim of this research and development work is to create a software application that allows designers to evaluate a user’s emotional response to virtual representations of architectural or urban planning environments. In this project, a galvanic skin response (GSR) test is adopted as an objective measurement for collecting skin conductance data representing emotional arousal. At the same time, the user’s self-reports are used as a form of subjective measurement for identifying emotional valence (i.e. positive, neutral, and negative). Finally, all of the information collected from both GSR readings (objective measurement) and self-reports (subjective measurement) are converted into coloured dots on the base map of the corresponding virtual environment (VE). According to the results of the VEmap evaluation and validation procedure, the beta-testing and evaluation of this project has been confirmed that VEmap may interpret users’ emotional changes as evoked by VE mostly. From a usability perspective, there is no obvious difficulty present for participants on all the controls. Moreover, according to participants’ comments, VEmap may increase users’ interests and promote their involvement if it is applied in architectural design and urban planning. However, gender might have influence on self-report part, and virtual reality usage or 3D game experiences might affect navigation in VE.

This study aimed to examine how the characteristics of the road network and the built environment influence the frequency of pedestrian-vehicle crashes. Pedestrian crashes (2000 – 2007) on major roads in DeKalb County of Georgia were obtained from Georgia Department of Transportation. Hotspot analysis was performed on locations with frequent pedestrian incidents to determine their built environment characteristics. Using Geographic Information Systems, the built environment was characterized using road grade, curvature, population density, the amount stores and restaurants, bars, and public transit stops nearby. A negative binomial regression model was used to examine the influence of the built environment characteristics on pedestrian crashes. The results showed that all the variables except for road grade were positively associated with increased number of pedestrian crashes. Findings provided insights into the influence of built environment characteristics which is important for injury prevention to improve pedestrian safety.

No description available.

Lean refers to the concepts of Lean operations, Lean principle, Lean philosophy, etc. It is what people often talk about in operation management. Clean refers to the concepts of being green, environmental friendly, less environmental impact, etc. These two words seem to be unrelated, but somehow connected. In this thesis, we explored the linking between Lean and environmental issues; analyze the possible benefits of coordination between Lean and environment. In the case study, we assessed the overall Lean performance of Alderholmens mekaniska, a local manufacturing company in Gävle, Sweden. This company was seeking for solutions of their environmental wastes in the production. We found that Lean activities could be used to achieve environmental objectives. Lean methods are capable of reducing environmental waste. To coordinate Lean and environmental issues could foster an organizational culture of continuous improvement in order to encourage people to improve for better overall performance; this also benefits the environmental performance. Based on the observation in the company, and the questionnaire made during an interview with their Lean specialist, we gave some proposals on Lean implementation with emphasis on environmental issues, in order to solve their problems of environmental wastes and, furthermore, improve the performance.