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This study investigates verb-final morphemes in Southern Nambikwara — a polysynthetic language spoken in the Mato Grosso region of southwestern Brazil. The verb-final morphemes -wa2 and -ɾa2/-la2 have previously been described as denoting an aspect distinction between imperfectivity and perfectivity (da Silva 2021; B. Kroeker 1982; M. Kroeker 2001; Lowe 1999). However, upon closer examination, this description appears flawed. By revisiting the data found in the previous literature as well as analyzing new first-hand data and the responses to a questionnaire, this study aims to describe the function and meaning of -wa2 and -ɾa2/-la2 with a focus on patterns of co-distribution with other verbal categories. The results suggest that -wa2 and -ɾa2/-la2 are markers of subjectivity and non-subjectivity, respectively. The present definition of subjectivity is based on Du Bois (2007) and Nuyts (2001), who emphasize that the distinctive factor between these categories is whether knowledge or evidence, and by extension the conclusion drawn from them, is exclusive to the speaker (or the speech act participants) or shared by a larger group. In addition, the shared or exclusive responsibility for an utterance as well as its sequential context are also of importance to the marking of subjectivity. Conclusively, the distribution of -wa2 and -ɾa2/-la2 varies with many grammatical categories, such as tense, person, mood/aspect, engagement, and polarity. The subjectivity marker -wa2 encodes exclusive knowledge and epistemic responsibility, while the non-subjectivity marker -ɾa2/-la2 denotes its counterpart, shared knowledge and shared epistemic responsibility.

This research is a practitioner inquiry into change in concepts in contexts of task based discourse in teacher education classrooms. The particular concepts selected for study are epistemic beliefs about knowledge in history. A hypothesis that there is a relationship between a perception of agency in task based discourse and change in concepts is proposed for research on the basis of a review of Kuhn's arguments for paradigm change and those of others on the problems of convergence of meaning between paradigms.1 Four of five quasi experimental studies conducted find tentative support for the alternative hypothesis and demonstrate how the relationship could be tested in the field. Change in epistemic beliefs from pre-test to post-test is significant in both groups, Control and Experimental, and consistently more and better change with moderate effect sizes is seen in the Experimental groups. A matched pedagogical method, experience of a range of suitable examples, Skemp (1971) was provided to both Control and Experimental groups and this is found to be effective in developing beliefs. The experimental construct, a perception of agency in task based discourse was enhanced in Experimental groups alone, which is used to explain the difference in change. A rubric, the Categories of Beliefs about Knowledge in History, CBKH, is developed and employed to examine responses to open ended questions. Likert Scales are also used and conclusions are drawn with a final quantitative analysis of data. Excerpts from a focus group discussion illustrate the process.

The thesis is focused on possible applications of the epistemic logic in the field of artificial intelligence studies. The first chapter deals with the origins and basic epistemic logic systems (the systems of J. Hintikka and M.Bezhanishvili). The second chapter presents examples of application of the epistemic logic methods in the artificial intelligence studies, and outlines problems and perspectives of said applications in the future. / Работа посвящена исследованию возможностей применения средств эпистемической логики в исследованиях искусственного интеллекта. В первой главе рассматриваются истоки и основные системы эпистемической логики (системы Я. Хинтикки и М. Н. Бежанишвили). Вторая глава предоставляет примеры применения средств эпистемической логики в исследованиях искусственного интеллекта, а также намечает проблемы и перспективы подобного применения в будущем.

Safety and risk assessment are key priorities for nuclear power plants. Probabilistic risk assessment (PRA) is a method for quantitative evaluation of accident risk, in particular severe nuclear core damage and the associated release of radioactive materials into the environment. The reliability and certainty of PRA have at times been questioned, especially when real-world observations have indicated that the frequency of nuclear accidents is higher than the probabilities predicted by PRA. This thesis provides a philosophical review of the epistemic uncertainties in PRA, using the Fukushima Daiichi accident of March 2011 as a case study. The thesis provides an overview of the PRA model structure, its key elements, and possible sources of uncertainty, in an attempt to understand the deviation between the real frequency of nuclear core-melt accidents and the probabilities predicted by PRA.The analyses in this thesis address several sources of epistemic uncertainty in PRA. Analyses of the PRA approach reveal the difficulty involved in covering all possible initiating events, all component and system failures, as well as their possible combinations in the risk evaluations. This difficulty represents the source of a characteristic epistemic uncertainty, referred to as completeness uncertainty. Analyses from the case study (the Fukushima Daiichi accident) illustrate this difficulty, as the PRA failed to identify a combined earthquake and tsunami, with the resultant flooding and consequent power failure and total blackout, as an initiating causal event in its logic structure.The analyses further demonstrate how insufficient experience and knowledge, as well as a lack of empirical data, lead to incorrect assumptions, which are used by the model as input parameters to estimate the probabilities of accidents. With limited availability of input data, decision-makers rely upon the subjective judgements and individual experiences of experts, which adds a further source of epistemic uncertainty to the PRA, usually referred to as input parameter uncertainty. As a typical example from the case study, the Fukushima Daiichi accident revealed that the PRA had underestimated the height of a possible tsunami. Consequently, the risk mitigation systems (e.g. the barrier seawalls) built to protect the power plant were inadequate due to incorrect input data.Poor assumptions may also result in improper modeling of failure modes and sequences in the PRA logic structure, which makes room for an additional source of epistemic uncertainty referred to as model uncertainty. For instance, the Fukushima Daiichi accident indicated insufficient backup of the power supply, because the possibility of simultaneous failure of several emergency diesel generators was assumed to be negligibly small. However, that was exactly what happened when 12 out of the 13 generators failed at the same time as a result of flooding.Furthermore, the analyses highlight the difficulty of modeling the human interventions and actions, in particular during the course of unexpected accidents, taking into account the physiological and psychological effects on the cognitive performance of humans, which result in uncertain operator interventions. This represents an additional source of epistemic uncertainty, usually referred to as uncertainty in modeling human interventions. As a result, there may be an increase in the probability of human error, characterized by a delay in making a diagnosis, formulating a response and taking action. Even this statement confirms the complexity of modelling human errors. In the case of the Fukushima Daiichi accident, lack ofvsufficient instructions for dealing with this "unexpected" accident made the coordination of operators' interventions almost impossible.Given the existence of all these sources of epistemic uncertainty, it would be reasonable to expect such a detected deviation between the real frequency of nuclear core-melt accidents and the probabilities predicted by PRA.It is, however, important to highlight that the occurrence of the Fukushima Daiichi accident could lie within the uncertainty distribution that the PRA model predicted prior to the accident. Hence, from the probabilistic point of view, the occurrence of a single unexpected accident should be interpreted with care, especially in political and commercial debates. Despite the limitations that have been highlighted in this thesis, the model still can provide valuable insights for systematic examination of safety systems, risk mitigation approaches, and strategic plans aimed at protecting the nuclear power plants against failures. Nevertheless, the PRA model does have development potentials, which deserves serious attention. The validity of calculated frequencies in PRA is restricted to the parameter under study. This validity can be improved by adding further relevant scenarios to the PRA, improving the screening approaches and collecting more input data through better collaboration between nuclear power plants world-wide. Lessons learned from the Fukushima Daiichi accident have initiated further studies aimed at covering additional scenarios. In subsequent IAEA safety report series, external hazards in multi-unit nuclear power plants have been considered. Such an action shows that PRA is a dynamic approach that needs continuous improvement toward better reliability.

Transitional care represents a critical juncture in the continuing care of patients with chronic conditions, particularly for adolescent patients. It also represents a significant point of failure in that process for adolescents, with many patients experiencing difficulties during the transition between adolescent and adult medicine that lead to negative long-term impact on health and wellbeing. This thesis aims at addressing adolescent transitional care processes and its obstacles through a broad medical humanities inquiry in a multidisciplinary dialogue between philosophy, social sciences, and medicine. The social, anthropological, and medical concepts of adolescence and autonomy were derived from a literature review and used to identify and philosophically analyze obstacles to adolescent transitional care. Studies were used to illuminate those obstacles. For a first person-perspective analysis, an autoethnography was developed to provide patient testimony, towards improving the reflection on transitional care. This analysis tested the alignment of the author’s experiences in interacting with a healthcare transition as part of the patient population with those recorded in the literature. This study has found barriers and facilitators concerning autonomy and communication at many levels and among many parties involved in the transition, such as patients, caregivers, healthcare providers, and healthcare systems operations, particularly regarding insurance management. This study recommends a focused coordination of primary care and/or transitional care specialists with the participation of adolescent patients’ voices and testimony to develop and manage challenges to autonomy in transitional care.

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