Thesis (M.S.)--Boston University / PLEASE NOTE: Boston University Libraries did not receive an Authorization To Manage form for this thesis or dissertation. It is therefore not openly accessible, though it may be available by request. If you are the author or principal advisor of this work and would like to request open access for it, please contact us at open-help@bu.edu. Thank you. / The purpose of this descriptive study was to describe critical care nurses knowledge and experience regarding the acutely confused elderly. A questionnaire, developed by the investigator, was mailed to two hundred nurses who were members of the American Association of Critical Care Nurses (AACN). The questionnaire consisted of three parts; a case study and questions assessing the respondents' knowledge of acute confusion, questions about the respondents' past personal experiences with the elderly, and a section on demographics. The response rate was 45%. The essential findings were: 1) the mean score on the knowledge items was 60% correct 2) ICU nurses had limited personal experiences with confused elderly people 3) neither level of education nor years of nursing experience affected how well the respondents did on the knowledge items 4) ICU nurses tended to attribute the cause of acute confusion in an elderly patient to ICU psychosis. Further research needs to be done on the etiology and characteristics of acute confusion and on nursing actions and interventions concerning the acutely confused elderly patient. The concept of ICU psychosis needs to be further explored. / 2999-01-01

Critical thinking ability is imperative for nurse practitioners in the multidimensional unfolding health care arena. Consensus as to what critical thinking entails has yet to be articulated. This non-empirical study thus set out to clarify the concept "critical thinking. Walker and Avant's (1995) proposal for conducting a concept analysis was used within the qualitative research paradigm. Literature selected from the fields of education, philosophy, nursing and psychology was consulted as the main source of data. Thematic and theoretical sampling of literature were also embarked upon during the later stage of the research to add density to emergent categories and themes. Categories were organised according to the Strauss and Corbin (1995) paradigmatic model; indicating the antecedents, disposition of the thinker, attributes and critical attributes, and outcomes of critical thinking. The findings indicate that critical thinking is a complex, multidimensional, dynamic, existential and context dependent mental operation. The essence of critical thinking is further illuminated by the construction of a model case and additional cases. The concept critical thinking is finally succinctly defined. The implications that critical thinking holds for nursing education and practice are spelled out. / Health Studies / M.A. (Health Studies)

This thesis describes a methodology for the requirements analysis of critical real-time systems. The methodology is based on formal methods, and provides a systematic way in which requirements can be analysed and specifications produced. The proposed methodology consists of a framework with distinct phases of analysis, a set oftechniques appropriate for the issues to be analysed at each phase of the framework, a hierarchical structure of the specifications obtained from the process of analysis, and techniques to perform quality assessment of the specifications. The phases of the framework, which are abstraction levels for the analysis of the requirements, follow directly from a general structure adopted for critical real-time systems. The intention is to define abstraction levels, or domains, in which the analysis of requirements can be performed in terms of specific properties of the system, thus reducing the inherent complexity of the analysis. Depending on the issues to be analysed in each domain, the choice of the appropriate formalism is determined by the set of features, related to that domain, that a formalism should possess. In this work, instead of proposing new formalisms we concentrate on identifying and enumerating those features that a formalism should have. The specifications produced at each phase of the framework are organised by means of a specification hierarchy, which facilitates our assessment of the quality of the requirements specifications, and their traceability. Such an assessment should be performed by qualitative and quantitative means in order to obtain high confidence (assurance) that the level of safety is acceptable. In order to exemplify the proposed methodology for the requirements analysis of critical real-time systems we discuss a case study based on a crossing of two rail tracks (in a model railway), which raises safety issues that are similar to those found at a traditional level crossing (i.e. rail-road).

published_or_final_version / Applied English Studies / Master / Master of Arts in Applied Linguistics

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