Isocyanates have a broad spectrum of uses and they are used in the production of many products including polyurethane polymers, coatings, adhesives, paints and foams. While isocyanates are widely studied and well represented in the literature, nitrogen substituted isocyanates are quite rare. Amino and imino-isocyanates are examples of nitrogen substituted isocyanates. Previous work within the group studied the reactivity of these intermediates in the alkene aminocarbonylation reaction, and used hydrazones and hydrazides as precursors of nitrogen substituted isocyanates. From there, a second reaction pathway was studied. This involved the reactivity of hydrazones with nucleophiles to develop a simple exchange reaction. In this work, the substitution reactivity involving imino-isocyanates will be presented. This will include the scope of nucleophiles and hydrazones as well as a discussion on the formation of the imino-isocyanates. This reactivity allows for the facile formation of a variety of hydrazones with the flexibility to start from common hydrazone precursors.

When compared to traditional concrete, steel fibre reinforced concrete (SFRC) shows several enhancements in performance, including improved tensile resistance, toughness and ductility. One potential application for SFRC is in columns where the provision of steel fibres can improve performance under axial and lateral loads. The use of SFRC can also allow for partial replacement of transverse reinforcement required by modern seismic codes. To improve workability, self-consolidating concrete (SCC) can be combined with steel fibres, leading to highly workable SFRC suitable for structural applications. Recent advances in material science have also led to the development of ultra-high performance fibre reinforced concretes (UHPFRC), a material which exhibits very high compressive strength, enhanced post-cracking resistance and high damage tolerance. In heavily loaded ground-story columns, the use of UHPFRC can allow for reduced column sections. This thesis presents the results from a comprehensive research program conducted to study the axial behaviour of columns constructed with highly workable SFRC and UHPFRC. As part of the experimental program, twenty-three full-scale columns were tested under pure axial compressive loading. In the case of the SFRC columns, columns having rectangular section and constructed with SCC and steel fibres were tested, with variables including fibre content and spacing of transverse reinforcement. The results confirm that use of fibres results in improved column behaviour due to enhancements in core confinement and cover behaviour. Furthermore, the results demonstrate that the provision of steel fibres in columns can allow for partial replacement of transverse reinforcement required by modern codes. The analytical investigation indicates that confinement models proposed by other researchers for traditional RC and SFRC can predict the response of columns constructed with SCC and highly workable SFRC. In the case of the UHPFRC columns, variables included configuration and spacing of transverse reinforcement. The results demonstrate that the use of appropriate detailing in UHPFRC columns can result in suitable ductility. Furthermore, the results demonstrate the improved damage tolerance of UHPFRC when compared to traditional high-strength concrete. The analytical investigation demonstrates the need for development of confinement models specific for UHPFRC.

Abstract The number of internationally educated nurses (IENs) in Ontario is growing. Given the predicted nursing shortage due to an aging nursing workforce and a short supply of nursing graduates, this trend will probably continue as international recruitment to meet nursing demands in Canada continues. Current Canadian research that examines IENs’ experience as they integrate into their workplaces is scarce. With an increasingly diverse Canadian and patient population due to rising immigration trends, a workforce that addresses the needs of the diverse patient population is valuable. Therefore an in-depth understanding of IENs’ experience, their contribution to nursing practice, and their distinct role in promoting health care access to Canada’s diverse population is necessary. A qualitative study using descriptive phenomenology was used to explore the integration experiences of eleven IENs within the Ontario, Canada health care system. Interviews were conducted to examine their experience of integrating into Canadian work settings. Thematic analysis informed by a descriptive phenomenological lens was used to uncover the essence of the IEN’s integration experience. The findings are categorized into five major themes including: Relationship with colleagues; Professional knowledge and experience; Organizational practices and work environment; Cross-cultural and linguistic competence; and IENs as an asset to nursing and patient care. These findings were nested within an overarching theme of resilience and an intrinsic motivation to establish their credibility as competent nurses. These findings highlight IENs’ unique integration experiences, and contribute to Canadian literature in the field, especially in terms of an understanding of IENs’ unique contribution to nursing in Canada. Implications and recommendations for nursing with regards to practice, education, research, and administration are presented.

New immigrants to Canada are identified as a vulnerable population in mental health and, as a result, organizations are signaling the need to enhance their mental health supports. The research uses focus groups and questions based on the messaging of a Canadian school mental health program to understand how new immigrant mothers interpret and develop key aspects of their mental health literacy and how they attain parent empowerment. A thematic assessment of the knowledge, interpretation, action and decision-making of the study participants (n=7), all recent immigrants to Canada and mothers of high school students, shows that new immigrant mothers are prepared to follow a path towards mental health literacy. At the same time, however, there are barriers that can block progression towards mental health literacy for this audience. These findings are supported by three umbrella themes: the first main theme “home as haven” espouses maternal roles in mental health maintenance such as protector and communicator, the second main theme “knowledge versus suspicions of mental health and mental illness” represents informed views and support of mental illness and myths and illusions of mental illness, and the third main theme, “additional barriers to mental health literacy” includes the hardships of immigration and fear of knowledge. The study concludes that new immigrant mothers appreciate the importance of fostering mental health understanding and discussion with their children at the same time that they encounter obstacles to the advancement of their mental health literacy. This study is relevant to the field of communication in that it demonstrates the experience of new immigrant mothers as a secondary audience in mental health programming. As the caregivers of their children, they are in position to enforce the messages and health maintenance behaviours of a school-based mental health program aimed at adolescents.

This thesis examines mothers’ risk perceptions and protective actions as they relate to their children’s environmental health. Children are more exposed and vulnerable than adults to environmental hazards, which have been found to be associated with numerous immediate and long-term negative health outcomes, due to physiological and behavioural factors. Despite the responsibility mothers typically bear as primary caregivers to their children, little is known about how they perceive and negotiate these risks in their day-to-day lives. To better understand mothers’ perceptions and associated protective actions across socioeconomic and geographic contexts, a mixed-method approach was employed involving a quantitative telephone survey (n=606) in Peel Region and Ottawa Public Health Units and qualitative face-to-face interviews (n=15) in Ottawa. Risk perceptions were influenced by income and perceived control, and concerns ranged from chemicals in household products to outdoor air pollution. There was a commonly reported perception that mothers should automatically become more concerned and take protective actions once they have children. When financial or other barriers prevented mothers from taking direct action to reduce risks, such as switching to safer products or changing food habits, they may have relied on emotion-focused coping techniques to reduce feelings of concern, including choosing to ignore risk information. Mothers’ information sources were examined to understand how risk information is best internalized; while the most common source of environmental health risk information was the Internet, many mothers expressed their mistrust in it and would have preferred to receive information directly from healthcare providers. This research contributes to the understanding of risk perception and protective action in a largely understudied population and the findings have practical implications for risk management and communication strategies targeting pregnant women and new mothers.

A Portuguese clay (BRN) from the North East city of Bragança was collected and characterized in terms of health treatment and applied towards the preparation of nanocomposites with Polylactide (PLA). The silt-clay fraction of BRN is mainly composed of smectite with less illite, kaolinite and other minerals. The physicochemical properties are applicable for the topical applications and are mainly influenced by smectite. With the hazardous elements present, further bioavailability tests should be conducted. PLA nanocomposites with BRN and Wyoming montmorillonite SWy-2 (MMT) were respectively prepared through the solution casting method with ultrasonic stirring and using cetyltrimethylammonium bromide (CTAB) as the surfactant. The X-ray diffraction patterns show the exfoliated structures in most samples. Thermal gravimetric analysis reveals the increased thermal stability of the nanocomposites. The complexes were also characterized by nitrogen adsorption, infrared analysis and nuclear magnetic resonance for comparing the differences between BRN and MMT.

In Ontario, career and guidance services are offered by teachers who have completed additional undergraduate studies. The training required to become a guidance counsellor appears to be insufficient to properly deliver the necessary guidance and counselling services. Many guidance counsellors are still operating as teachers within their new role as guidance counsellors. The aim of this qualitative research was to explore the professional identity of guidance counsellors’ working in Ontario, from their perspective. A semi-structured questionnaire was developed and twelve guidance counsellors were interviewed. Eight participants had completed the required undergraduate studies and four had completed a master’s degree in the field. The thematic analysis revealed four major themes that articulated and explained their professional identity: peer support, contextual factors, professional experience and formal training. The study’s limitations are discussed and suggestions for future research are offered.

Despite disaster managers’ best efforts, inter-organizational disaster management suffers from varying levels of success. One factor that is likely to account for these variations is team mutual understanding, also known as common ground. To validate the potential effect of common ground in disaster management, the thesis investigates common ground in several interviews with disaster managers and in an experimental study involving an inter-organizational disaster event scenario. Analysis of interviews revealed that disaster managers perceived gaps in understanding between responders, the importance of mutual understanding, and perceived common ground similarly to depictions in theory with a few exceptions. Analyses of the experimental study indicated that contextual factors of Team composition, Problem solving approach and Type of tasks differently impacted measures of performance and implicit coordination, and that implicit coordination partially mediated and supressed the relationship between contextual factors and decision quality. Findings suggest the variation in disaster managers’ performance can be ascribed to common ground, implicit coordination, and contextual factors. Moreover, results showed the satisfaction with outcome did not correlate with expert rated quality of decision; and that while satisfaction related to consensus and quality of the decision was linked to generating alternative ideas and debate. Collaboration proved to be more effective in public communication tasks, especially for homogenous team composition. The findings support initiatives for more cross-training and further lab and field experiments.

The literature suggest that many young and small firms are discouraged borrowers, that is, they need finance but do not apply because they fear denial. This research aims to investigate demand-side financing differences between male and female-owned small and medium enterprises in Canada from the perspective of discouraged borrowers using secondary data from the "Survey on Financing of Small and Medium Enterprises, 2004" conducted by Statistics Canada. Women-owned firms are found to be credit constrained according to some studies, but not so in others. To date, however, there remain a lack of studies examining if there is a relationship between gender and discouragement. The study uses multivariate research methods to examine such a relationship while controlling for various firm-specific (age, size, industry, etc.) and owner-specific characteristics (experience). The study finds that majority-female owned firms are more likely to be discouraged borrowers as compared to majority-male owned firms. The study also offers support to arguments that relationship banking is important in reducing the probability of discouragement in both young and established firms.

This thesis is concerned with the performance and measurement uncertainty of wire-mesh sensors in different air-water flow regimes in horizontal pipes. It also presents measurements of void fraction and interfacial velocity in such flows. It was found that the interfacial velocity measurements of the wire-mesh sensors were in good agreement with those taken with a high-speed camera and estimates of the uncertainties of these measurements are presented. Drift-flux models were fitted to the measurements and it was found that the parameters of these models were not only sensitive to the flow regime, but also to the liquid superficial velocity.