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The unconventional improvements in the power electronics field have been the primary reason for massive deployment of renewable energy sources in the electrical power grid over the past several decades. This needed trend, together with the increasing penetration of micro-, and nano- grids, is bringing significant improvements in system controllability, performance, and energy availability, but is fundamentally changing the nature of electronically-interfaced sources and loads, altering their conventionally mild aggregate dynamics, and inflicting low- and high- frequency dynamic interactions that never before existed at this magnitude. This problem is not restricted only to the grid; modern electronic power distribution systems built for airplanes, ships, electric vehicles, data-centers, and homes, comprise dozens, even hundreds of power electronics converters, produced by different manufacturers, who provide very limited details on converters' dynamic behavior - distinctiveness that has the highest impact on how two converters, or converter and a system interact. Consequently, substantial dispersion of power electronics into the future grid will significantly depend on engineers' capability to understand how to model and dynamically control power flow and subsystem interactions. It is therefore essential to continue developing innovative methods that allow easier system-level modeling, continuous monitoring of dynamic interactions, and advanced control concepts of power electronics converters and systems. The dissertation will start with a "black box" approach to modeling of three-phase power electronics converters, introducing a method to remove source and load dynamics from in-situ measured terminated frequency responses. It will be then shown how converter, itself, can perform an online stability assessment knowing its own unterminated dynamics, and being able to measure all terminal immittances. The dissertation will further advance into an approach to control power electronics converters based on the electro-mechanical duality with synchronous machines, and end with selected examples of system-level operation, where small-signal instability in multi-source power systems can be mitigated using this concept. / Ph. D. / The modern technological advancements and ever-increasing needs for a sustainable future silently demand a serious revision of the conventional practice in electricity production, distribution, and utilization. These technologies are already challenging the limits of the biggest and most complex system ever built by humankind - the electrical grid. One practical solution to this problem is much higher dispersion of electronic power conversion systems capable of decoupling dynamics between system sources, distribution, and loads, while improving system controllability, reliability, and efficiency. Such a trend is already happening, and there has been an increased immersion of power electronics converters in electric cars, ships, airplanes, and the grid, in an effort to replace their traditional thermal, mechanical, hydraulic, and pneumatic systems. The goals have been to reduce the size, weight, and operational costs while increasing efficiency and reliability. In all these applications, a majority of energy sources and loads are interfaced to the power system through power electronics converters ranging in power from few watts to hundreds of megawatts. However, massive dispersion of power electronics into the future grid will significantly depend on engineers’ capability to understand how to model and dynamically control power flow and subsystem interactions. It is important to continue researching innovative methods that allow easier system-level modeling, continuous monitoring of interactions, and advanced control concepts of power electronics converters and systems. This dissertation hence addresses modeling of power electronics converters using their behavioral models, and shows how these models can assist the stability assessment of the system converters operate in. Additionally, dissertation presents an alternative way to control power electronics converters to behave as synchronous machines, and how this concept can be used to mitigate some stability problems.

The current study investigated maternal determinants of mental health service use, namely, individual child therapy, among preadolescent children diagnosed with ADHD. The Behavioral Model of Health Care Utilization (Andersen, 2008) was used as a theoretical framework for the study. Data from the last three rounds of ECLS-K dataset were employed to test a longitudinal model using Bayesian analysis. Socio-demographic variables and maternal mental health were tested as exogenous variables and mother-child relationship variables, discipline variables, and perceived maternal concern about child’s overall behavior and child’s emotional symptoms were tested as intervening variables. Results showed that only maternal mental health remained in the model as an exogenous variable. The effect of mental health on child therapy was mediated by maternal aggravation and maternal concern about overall behavior in one path and by maternal concern about emotional symptoms in another path, suggesting that maternal mental health needs to be considered when attempting to understand help-seeking determinants. Both concern variables were found to have large direct effects on child therapy. The results of the current study showed the importance of maternal mental health and the importance of determinants related to mother-child relationship in a mother’s decision to seek therapy for a child.

This study investigates the characteristics of and the interrelationships between disease, disability, service use and social support in a random sample of 647 community dwellers aged 75 years and over. The two broad objectives of the study are: to examine the physical aspects and manifestations of health by investigating disease and disability and the interrelationships between these two factors, and; to examine the social aspects of health by investigating service use and social support and the interrelationships between these two factors. Given the dramatic population ageing in Australia, particularly in the very old age groups, the health, well-being and quality of life of older Australians are of paramount importance and will be well into the future. The proportion of the population with diseases and disabilities increases significantly with age. As the physical aspects of health are manifested with increasing age the social aspects of health also become increasingly important. Older adults, particularly those in advanced old age, are disproportionately high users of health and community services. Despite the high use of services in this age group, far more older adults living in the community rely on their families, friends and neighbours for social support and many older adults use a combination of formal services and informal social support. Little is known about people aged 75 years and over living in the community in Australia. In particular, significant knowledge gaps exist with regard to the relationship between disease and disability and that between service use and social support. The characteristics of social support in this group of older adults are also largely unknown. The papers presented in this thesis are based on data collected in The Sydney Older Persons Study (SOPS). This is a large longitudinal multidisciplinary project which began in 1991 in order to investigate the health and service use patterns of people aged 75 years and over living in the community in the Central Sydney Health Area. The initial sample consisted of two groups: first, the Australian Bureau of Statistics (ABS) selected census districts with probability proportional to size and 9271 households were door-knocked to obtain a random sub-sample of the general community (n=320, response rate 73%); second, community-living veterans and war widows residing in the Central Sydney Health Area were selected at random from a list provided by the Department of Veterans Affairs to obtain a veteran/war widow sub-sample (n=327, response rate 82%). Respondents participated in both an interview conducted by a social scientist and a medical assessment performed by a medical practitioner with experience in geriatric medicine. An informant was sought for each respondent and this informant participated in a phone interview conducted by a social scientist. The first paper in this thesis investigates the characteristics of diseases (neurodegenerative, systemic and psychiatric) including their prevalence and association with age. The second paper extends the first by examining the nature of the relationship between disease and disability and in particular which individual diseases and groups of diseases have the greatest impact on disability. The third paper expands the analysis in the second paper by focusing in greater detail on the relationship between disease and disability. The contribution of clinically-diagnosed individual diseases and groups of diseases to three different measures of disability (clinician-rated, informant-rated or proxy and self-report) is investigated here. The fourth paper examines the possibility of disease and disability being the major predictors of service use and social support. It focuses on the determinants of service use and social support using Andersen's behavioral model. The fifth paper investigates the characteristics of social support, in particular gender differences and the socio-demographic variables associated with social support. This is an important research area because lower levels of social support have been found to predict mortality, disease and lower levels of well-being. Finally, the sixth paper links the major themes of the fourth and fifth papers by investigating the relationship between service use and social support. This paper tests Cantor's 'hierarchical-compensatory' mechanism, which predicts a negative association between service use and social support, and the 'bridging' mechanism which predicts a positive association between these two factors. Thus it assesses the extent to which demands for service use and for social support are made together or in a compensatory fashion for respondents of equal disease and disability. The presented work demonstrates that neurodegenerative diseases [dementia, cognitive impairment, parkinsonism, instability (gait ataxia), immobility (gait slowing) and motivation loss/behaviour change] have the largest and most significant increases with age of all disease groups. Therefore the hypothesis made in paper one that neurodegenerative diseases will come to dominate the health care needs of older adults, particularly when combined with population ageing, is supported. Further, results of papers two and three indicate that neurodegenerative diseases result in greater levels of disability, lending credence to the finding that it is these neurodegenerative diseases that are of central importance to the future of the health care needs of older adults of advanced age. While systemic diseases play an important role in disability, the neurodegenerative diseases are under-recognised by self-report and yet are most strongly associated with severe disability. A major recommendation of this study is that assessments and diagnosis of neurodegenerative diseases be included in disability assessments. With regard to the social aspects of health, the fourth paper finds that disease and disability are the main predictors of service use and social support. The fifth paper highlights important gender differences in social support and also finds that lower levels of social support are associated with increased age, male gender, single marital status and lower socioeconomic status. Because it is widely accepted that social support is protective against adverse health outcomes and low levels of wellbeing, these groups of older adults are at risk of poorer health and wellbeing. Finally the sixth paper fills some knowledge gaps with regard to the relationship between service use and social support. It shows that with regard to IADL (instrumental activities of daily living) services and IADL social support, Cantor's 'hierarchical-compensatory' mechanism (negative correlation) applies but with regard to medical services and both ADL (activities of daily living) and IADL social support the 'bridging' mechanism (positive correlation) is supported. These complex interrelationships between disease, disability, service use and social support are summarised schematically in a model. In light of significant population ageing, substantial resources in the form of medical and community services and social support from carers, family, friends and neighbours will need to be devoted to older adults with diseases, in particular neurodegenerative diseases, and to those with disabilities. Given the increasing importance of disease, disability, service use and social support in very old age, it is crucial that knowledge and understanding of these factors and their interrelationships be advanced in order to better allocate and sustain resources and to ultimately improve the health, well-being and quality of life of very old adults.

Cognitive and behavioral models have become popular methods to create autonomous self-animating characters. Creating these models presents the following challenges: (1) Creating a cognitive or behavioral model is a time intensive and complex process that must be done by an expert programmer (2) The models are created to solve a specific problem in a given environment and because of their specific nature cannot be easily reused. Combining existing models together would allow an animator, without the need of a programmer, to create new characters in less time and would be able to leverage each model's strengths to increase the character's performance, and to create new behaviors and animations. This thesis provides a framework that can aggregate together existing behavioral and cognitive models into an ensemble. An animator only has to rate how appropriately a character performed and through machine learning the system is able to determine how the character should act given the current situation. Empirical results from multiple case studies validate the approach taken.

Introduction Transition care clinics (TCCs) have proven to be effective in meeting the time-sensitive needs of patients in the post-discharge period and ensuring smooth transitions of patients from hospital to home. These clinics have led to lower readmissions, lower emergency department visits, cost savings, and lower rates of other adverse events following discharge. However, TCCs, including the East Tennessee State University Family Medicine (ETSU-FM) TCC have been facing high rates of patient no-shows. Aim The aim of this dissertation is to identify the different components and outcomes of TCC based on the literature. We further aim to analyze the TCC implementation process at the ETSU-FM clinic, identify gaps, and provide recommendations to address those gaps. Methods A scoping review was conducted using three databases (PubMed, Web of Science, and PsycINFO) searches while following the Preferred Reporting Items for Systematic reviews and Meta-Analyses extension for Scoping Reviews Checklist to identify different components of TCCs and the associated outcomes. Additionally, a mixed-methods study was conducted using patients and providers from the ETSU-FM clinic to identify different factors associated with patients’ no-shows to scheduled TCC appointments. Results Eighteen studies were analyzed and TCC components and patients’ outcomes were assessed. Predischarge communication with patients and caregivers, early post-discharge contacts, etc. were identified as some of the effective components of TCC. Our review also highlighted that TCC resulted in lower readmissions, lower ED visits, and cost-effectiveness. For the mixed-methods study, we included 520 patients in our quantitative analysis and interviewed 10 providers for the qualitative analysis. Several patient-level and system-level factors were found to be associated with TCC no-shows. A few of the factors that were deemed modifiable by the clinic have been identified and recommendations provided accordingly. Conclusion TCCs play a vital role in ensuring smooth care transitions of patients following discharge. It is crucial to conduct context-level studies to identify factors that are associated with TCC no-shows and design interventions accordingly. Doing so could lead to pursuit of the triple aim of healthcare: improving patients’ experience of care, improving the health of populations, and reducing the per capita cost of health care.

In this study, the utilization of palliative care services, acute care services, and location of death for clients who were palliative and receiving services from Champlain Community Care Access Centre (CCAC) in Ontario during their last month of life were investigated. An adaptation of Andersen?s Behavioral Model of Health Services Utilization provided context and structure to this study. This is an historical, quantitative descriptive study using chart audits for data collection. The data on CCAC clients who were palliative and who died during the month of July 2009 were tracked during their last month of life. Collection of socio-demographic data, services provided through CCAC, emergency department visits, hospital admissions, and location of death provided the data for this study. The clients who died at home used more CCAC services than those who died at other locations and frequently community palliative care physicians provided their medical care. The findings of this study included: 1) The majority of the clients, who expressed a preference, died in their preferred location. 2) The role of community palliative care physicians was an important component of the services that supported the clients to die in their location of choice. 3) Over 25% of the study sample died in a hospital and the clients used a large number of in-patient hospital days with one quarter of the hospital deaths taking place in an emergency department or an intensive care unit. 4) During the last month of life, 25% of the clients received chemotherapy and/or radiation therapy. 5) The clients who died at home used more CCAC services than those who died in other locations and who used institutional resources. The implications for practice, policy, research, and education are discussed.

Text in German, with summaries in German, English, Afrikaans, and isiZulu / Includes bibliographical references (leaves 111-117) / Das Themengebiet der Wirtschaftsethik bezieht sich auf eine gesellschaftlich höchst relevante Thematik, insofern das Denken in der modernen wirtschaftswissenschaftlichen Disziplin als auch die diesbezüglich tagtäglich im Wirtschaftsleben geübte Praxis teils sehr negative Konsequenzen für Mensch und Umwelt zeitigen. Vor diesem Hintergrund soll in dieser Arbeit das Verhaltensmodells der Standardökonomie, welches den durchschnittlichen wirtschaftlichen Akteur (homo oeconomicus) als rationalen Gewinn- und Nutzenmaximierer beschreibt, in Hinblick auf die zugrunde liegenden normativ-ethischen Grundlagen und den daraus abgeleiteten Umgang mit den beiden zentralen Produktionsfaktoren Arbeit und Kapital untersucht werden. Sodann wird das dahinterstehende Menschenbild und ethische Verhaltensmodell der biblisch-christlichen Anthropologie und Ethik gegenübergestellt und es werden die diesbezüglichen Gemeinsamkeiten und Differenzen herausgearbeitet. In der Beantwortung der Forschungsfrage wird auf ein spezifisch christlich-evangelikales Schrift- und Auslegungsverständnis zurückgegriffen. Die gegenständliche Arbeit zeigt, dass i) das christliche Menschen- und Gottesbild alle Lebensbereiche und somit auch den des Wirtschaftslebens umfasst und ii) sich Gemeinsamkeiten und Differenzen in den Menschenbildern und ethischen Verhaltensmodellen identifizieren lassen. Weiterführende Ansätze werden am Ende skizziert. / The topic of economic ethics refers to a highly relevant societal issue, as the analytical thinking in modern economic science as well as everyday business practice are in part responsible for substantial negative effects on human beings and the environment. Against this background, this research paper describes the behavioural model of standard economics (homo oeconomicus) in terms of the underlying ethical foundations. In the next step, the underlying anthropology and ethics of the homo oeconomicus model are contrasted with the biblical Christian view, and common features as well as fundamental differences are elaborated on. This research paper shows that i) Christian anthropology and ethics refer to all areas of life including the area of economic activity; and ii) common features as well as fundamental differences can be identified. The concluding section outlines some approaches to adapt the standard economic modelling on the basis of biblical principles. / Ekonomiese etiek is ’n hoogs tersaaklike samelewingsvraagstuk omdat analitiese denke in moderne ekonomiese wetenskap én in alledaagse sakepraktyke beduidende gevolge inhou wat ’n negatiewe invloed op mense en die omgewing het. In die lig hiervan beskryf hierdie navorsing die behavioristiese model van standaardekonomie (homo oeconomicus) in terme van die onderliggende etiese grondslag. In die volgende stap word die onderliggende antropologie en etiek van die homo oeconomicus-model en ’n bybelse, christelike standpunt teenoor mekaar gestel. Die kenmerke wat hierdie twee beskouings met mekaar gemeen het sowel as die verskille tussen hulle word in detail uiteengesit. Hierdie studie toon i) dat christelike antropologie en etiek van toepassing is op alle terreine van die lewe, insluitend ekonomiese aktiwiteite; en ii) dat gedeelde kenmerke én grondliggende verskille geïdentifiseer kan word. As deel van die gevolgtrekking word voorgestel hoe die standaard- ekonomiese model aan die hand van bybelse beginsels aangepas kan word. / Isihloko senkambiso elungileyo yezomnotho sibhekiswe odabeni oluphathelene nomphakathi olusemqoka futhi okungudaba olufanelekile kakhulu, njengoba ukucabanga-sakuhlaziya emkhakheni wesayensi yezomnotho wesimanje manje ngokunjalo nezinqubo-nkambiso zansukuzonke eziphathelene nebhizinisi ngandlelathile kunaso isandla kumthelela omubi kakhulu owenzekayo kubantu nakwimvelo. Ngokususela kulesi simo, leli phepha locwaningo lichaza imodeli yokuziphatha eqondiswe emkhakheni wezomnotho ojwayelekile (homo oeconomicus) ngokwezisekelo zenkambiso elungileyo eziqondene nalokhu. Esinyathelweni esilandelayo, isayensi yemvelaphi kanye nenhlalo yabantu (anthropology) kanye nenkambiso elungileyo yemodeli ye-homo oeconomicus eyisisekelo salokhu kuqhathaniswa nombono wobuKrestu wasebhayibhelini, futhi kuchazwa kabanzi ngezinto ezifanayo ezitholakala kulokhu kokubili kanjalo nezicibunjalo ezibalulekile ezenza lokhu kwehluke. Leli phepha locwaningo liyabonisa ukuthi i) imvelaphi nenhlalo yabantu ngokobuKrestu kanye nezinkambiso ezilungileyo zobuKrestu kuqondiswe kuyo yonke imikhakha yempilo kubandakanya nomkhakha wemisebenzi yezomnotho; futhi ii) zingahlonzeka izinto ezifanayo kanye nezinto ezibalulekile ezihlukile kulokhu okubili. Isigaba sokuphothula sibeka ngokucacile izindlela ezithile zokuhambelanisa amamodeli ezomnotho ajwayelekile nemigomo yebhayibheli. / Philosophy, Practical and Systematic Theology / M. Th. (Theological Ethics)

In this study, the utilization of palliative care services, acute care services, and location of death for clients who were palliative and receiving services from Champlain Community Care Access Centre (CCAC) in Ontario during their last month of life were investigated. An adaptation of Andersen?s Behavioral Model of Health Services Utilization provided context and structure to this study. This is an historical, quantitative descriptive study using chart audits for data collection. The data on CCAC clients who were palliative and who died during the month of July 2009 were tracked during their last month of life. Collection of socio-demographic data, services provided through CCAC, emergency department visits, hospital admissions, and location of death provided the data for this study. The clients who died at home used more CCAC services than those who died at other locations and frequently community palliative care physicians provided their medical care. The findings of this study included: 1) The majority of the clients, who expressed a preference, died in their preferred location. 2) The role of community palliative care physicians was an important component of the services that supported the clients to die in their location of choice. 3) Over 25% of the study sample died in a hospital and the clients used a large number of in-patient hospital days with one quarter of the hospital deaths taking place in an emergency department or an intensive care unit. 4) During the last month of life, 25% of the clients received chemotherapy and/or radiation therapy. 5) The clients who died at home used more CCAC services than those who died in other locations and who used institutional resources. The implications for practice, policy, research, and education are discussed.