Growing interest in the simulation of first order transient systems, typical of those encountered in transient heat conduction, flow transport, and fluid dynamics, has prompted the development of a variety of time integration methods for solving these systems numerically. The primary contribution of this thesis is the design and development of a new time integration/discretization framework, under the class of single step single solve algorithms which are the most popular, for use in such first order transient systems with computationally attractive features. These include second order accuracy, unconditional stability, zero-order overshoot, and controllable numerical dissipation with a new selective control feature which overcomes the restrictions in the existing and current state-of-the-art methods. Throughout the thesis, we demonstrate the capability and advantage of the newly developed framework, termed GS4-1, in comparison to existing methods using various types of numerical examples (both linear and nonlinear). The numerical results consistently demonstrate the roles played by the new feature in improving the numerical solutions of both the primary variable and its time derivative which is important to correctly capture the dynamics of the problems, in contrast to the existing methods without such a feature. Additionally, a breakthrough contribution presented in this thesis is the development of an isochronous integration framework (iIntegrator), stemming from the novel relations between the newly developed GS4-1 framework and the existing GS4-2 framework (for second order dynamic systems). Such a development enables the use of the same computational framework to solve both first and second order dynamic systems without having to resort to the individual GS4-1 and GS4-2 frameworks; hence the practicality in the computational and implementation aspects. Finally, the application of the new GS4-1 framework to silica particle deposition, which is a practical problem of interest, is presented with the focus primarily on the physics of the problem. In this part of the thesis, a numerical model of the problem is presented and employed to investigate the effects of the flow and physicochemical parameters on the rate of deposition. The results of the parametric studies undertaken based on the employed numerical model enable some recommendations for the mitigation of the problem, and therefore serve as additional valuable contribution of the thesis.

The University Medical Center in Tucson, Arizona developed and implemented a procedure-specific Limitation of Medical Care (LMC) form on December 1, 1989 to address medical futility and lack of clarity in do-not-attempt-resuscitation (DNAR) orders. A retrospective review of two years of data, with 300 usable responses, showed an increased amount of participation by patients and their surrogates in the DNAR decision with the LMC form. Use of the form was also associated with an increased number of medical interventions specified to be withheld after a DNAR or LMC order was written. There was no decrease in expenditures or length of survival associated with use of the form, nor was there a decrease in the number of codes called for patients who had an order that resuscitation was not to be attempted. An average $13,347 of charges were accrued in the ICU for patients in the pre-form group, $4,314 on average being after a DNAR order was written. An average $21,957 of charges were accrued in the ICU for patients in the post-form group, $8,733 on average being after a DNAR order was written. An average $20,523 of total charges were accrued for patients in the pre-form group, $7,156 on average being after a DNAR order was written. An average $29,830 of total charges were accrued in the ICU for patients in the post-form group, $12,550 on average being after a DNAR order was written. Recommendations for the UMC Bioethics Committee and future research suggestions are presented.

Although retention has become a critical priority for most institutions, this interest has not yielded significantly increased retention rates over the past 30 years. Understanding how each individual institution could increase retention rates will help to avoid the critics of higher education who have grown wary over the increasing costs. In order to justify the increases in tuition, higher education must show that students can persist, graduate, and succeed in the 'real world'.This exploratory study seeks to provide insight into persistence by focusing on understanding the common themes of students who persisted. In 2001, Woodard, Mallory, & DeLuca published a research article providing a comprehensive structure that incorporates an extensive body of student retention research along with the authors' own research. The framework provides institutions with a model to explore the areas that affect student retention. The authors describe four major components to retention: the student sphere, institutional sphere, academic affairs sphere, and student services sphere. Within each of these spheres is a number of characteristics that research indicates effects retention. The Retention Self-Study Framework (2001) draws heavily from the research of Vincent Tinto (1975, 1987, 1993), John Bean (1980, 1983), Alexander Astin (1984), and Ernest Pascarella (1980).This study investigates the extent to gender, race, high school class rank, socio-economic status, institutional choice, financial aid package, and parents' education relate to the experiences within the Retention Self-Study Framework (Woodard, Mallory, & DeLuca, 2001).Utilizing the Retention Self-Study Framework, the author created a survey that asked students about each of the various characteristics within the four spheres described in the framework. The research was conducted at a large Research-Extensive university in southwest United States of undeclared majors. Utilizing both mixed methods, the research provides a fresh look at issues of retention and those experiences that are related to persistence and suggests implications for practice and future research.

Depression has a high prevalence among college students. Because it is a highly private (i.e. experiential) and socially stigmatized mental illness, it often goes undetected in daily life. The basic research question behind this line of research is how students' postings on their social networking websites can be used for the early detection of depression. The current research investigates how well depression can be gauged from MySpace profiles (Study 1) and Facebook profiles (Study 2 & Study 3). Across studies, the results reveal that depression can be assessed with a moderate degree of accuracy. In addition, Study 3 presents evidence that viewing "mini-blogs" allows for similar levels of accuracy compared to viewing an entire profile and the degree to which a person is Extraverted or censors information about themselves (e.g. Impression Management, Public Self-Consciousness) influences the degree of accuracy. Overall, the results speak to the idea that social networking sites can be a cost effective and clinically relevant tool to detecting depression.

No description available.

Although many advances in the treatment of schizophrenia have been made over the past decade, little is known about the process of recovery from a first episode of schizophrenia (FES). To date, the study of recovery in the field of mental health has focused on long-term mental illness. This in depth qualitative study drew upon Charmaz’s (1990) constructivist grounded theory methodology to address the following questions: How do individuals who have experienced a FES describe their process of recovery? How does an identified individual (e.g. friend, family member, teacher, or clinician) describe their role during the participant’s process of recovery, and their perception of the recovery process? Ten primary participants (who self-identified as recovering from a FES) had two interviews; in addition, there was a one-time interview with a secondary participant, for a total of 30 interviews. Data collection sources included participant semi-structured interviews, participant selected personal objects that symbolized their recovery, and clinical records. The results provide a substantive theory of the process of recovery from a FES. The emergent process of recovery model for these participants is comprised of the following phases: ‘Lives prior to the illness’, ‘Lives interrupted: Encountering the illness’, ‘Engaging in services and supports’, ‘Re-engaging in life’, ‘Envisioning the future’; and the core category, ‘Re-shaping an enduring sense of self,’ that occurred through all phases. A prominent distinctive feature of this model is that participants’ enduring sense of self were reshaped versus reconstructed throughout their recovery. The emergent model of recovery from a FES is unique, and as such, provides implications for clinical care, future research, and policy development specifically for these young people and their families.

Between 1914 and 1919, Germans and Austrians experienced previously unimaginable sociopolitical transformations: four years of war, military defeat, the collapse of the Hohenzollern and Habsburg monarchies, the creation of democratic republics, and the redrawing of the map of Central Europe. Through an analysis of new state symbols and the staging of political and cultural celebrations, this dissertation explores the multiple and conflicting ways in which Germans and Austrians sought to reconceptualize the relationships between nation, state and politics in the wake of the First World War. Whereas the political right argued that democracy was a foreign imposition, supporters of democracy in both countries went to great lengths to refute these claims. In particular, German and Austrian republicans endeavored to link their fledgling democracies to the established tradition of großdeutsch nationalism – the idea that a German nation-state should include Austria – in an attempt to legitimize their embattled republics. By using nineteenth-century großdeutsch symbols and showing continued support for an Anschluss (political union) even after the Entente forbade it, republicans hoped to create a transborder German national community that would be compatible with a democratic body politic. As a project that investigates the entangled and comparative histories of Germany and Austria, this dissertation makes three contributions to the study of German nationalism and modern Central European history. First, in revealing the pervasiveness of großdeutsch ideas and symbols at this time, I point to the necessity of looking at both Germany and Austria when considering topics such as the redefinition of national identity and the creation of democracy in post-World War I Central Europe. Second, it highlights the need to move beyond the binary categorizations of civic and ethnic nationalisms, which place German nationalism in the latter category. As the republicans’ use of großdeutsch nationalism demonstrates, the creation of a transborder German community was not simply the work of the extreme political right. Third, it contributes to recent scholarship which seeks to move past the entrenched question of why interwar German and Austrian democracies failed. Instead of simply viewing the two republics as failures, it investigates the ways in which citizens engaged with the new form of government, as well as the prospects for the success of democracy in the wake of military defeat. In drawing attention to the differences between the German and Austrian experiments with democracy, this dissertation points to the relative strengths of the Weimar Republic when compared to the First Austrian Republic.

In Canada, accessible and culturally relevant population health data for urban First Nations, Métis and Inuit people are almost non-existent. There is a need for Aboriginal community centric research and data systems, specifically in the area of mental health and substance misuse. The goal of this research was to address these knowledge gaps. The three linked studies being presented were nested in the Our Health Counts (OHC) project, a multi-partnership study aimed at developing a baseline population health database for urban Aboriginal people living in Ontario. In the first study, concept mapping was used to engage urban Aboriginal stakeholders from three culturally diverse communities in identifying health priorities. After completing brainstorming, sorting and rating, and map interpretation sessions, three unique community specific maps emerged. Map clusters and their ratings reflected First Nations, Inuit, and Métis understandings of health. Concept mapping encouraged community participation and informed the development of three health assessment surveys. The second study generated a representative sample of First Nations adults and children living in Hamilton, Ontario by utilizing Respondent Driven Sampling (RDS), a modified chain-referral sampling approach. Population estimates were generated for household and personal income, mobility, over-crowding and food availability. Results revealed striking disparities in social determinants of health between First Nations and the general population. The third study used the RDS generated sample to examine mental health and substance misuse among First Nations adults living in Hamilton. Prevalence estimates were generated for diagnosis and treatment of a mental illness, depression, anxiety, post-traumatic stress disorder (PTSD), suicide, alcohol and substance misuse, and access to emotional supports. Findings indicated that First Nations adults living in Hamilton experience a disproportionate burden of mental health and substance misuse challenges. The three linked studies make innovative contributions to Aboriginal health research. Results clearly exemplify the effective application of community-based research methods that are grounded in local knowledge and built on existing community strengths and capacities. Representative population health data for urban First Nations will contribute to current deficiencies in health information; will shape policy and programming priorities as well as future research directions, particularly with respect to health and social disparities among this population.

We find an adequate interpretation of the Lamé operator within the framework of elliptic complexes and study the first mixed problem for the nonstationary Lamé system.

Nucleation is the first step in the formation of a new phase in a thermodynamic system. The Classical Nucleation Theory (CNT) is the traditional theory used to describe this phenomenon. The object of this thesis is to investigate nucleation beyond one of the most significant limitations of the CNT: the assumption that the surface tension of a nucleating cluster of the new phase is independent of the cluster’s size and has the same value that it would have in the bulk of the new phase. In order to accomplish this, we consider a microscopic, two-dimensional Lattice Gas Automata (LGA) model of precipitate nucleation in a supersaturated system, with model input parameters Ess (solid particle-to-solid particle bonding energy), Esw (solid particle-to-water particle bonding energy), η (next-to-nearest neighbour bonding coeffiicent in solid phase), and Cin (initial solute concentration). The LGA method was chosen for its advantages of easy implementation, low memory requirements, and fast computation speed. Analytical results for the system’s concentration and the crystal radius as functions of time are derived and the former is fit to the simulation data in order to determine the system’s equilibrium concentration. A mean first-passage time (MFPT) technique is used to obtain the nucleation rate and critical nucleus size from the simulation data. The nucleation rate and supersaturation are evaluated using a modification to the CNT that incorporates a two-dimensional, radius-dependent surface tension term. The Tolman parameter, δ, which controls the radius-dependence of the surface tension, decreases (increases) as a function of the magnitude of Ess (Esw), at fixed values of η and Esw (Ess). On the other hand, δ increases as η increases while Ess and Esw are held constant. The constant surface tension term of the CNT, Σ0, increases (decreases) with increasing magnitudes of Ess (Esw) fixed values of Esw (Ess), and increases as η is increased. Together, these results indicate an increase in the radius-dependent surface tension, Σ, with respect to increasing magnitude of Ess relative to the magnitude of Esw. Σ0 increases linearly as a function of the change in energy during an attachment or detachment reaction, |ΔE|, however with a slope less than that predicted for a crystal that is uniformly packed at maximum density.