It is the purpose of this paper to illustrate from the novels themselves that Defoe's protagonists are essentially isolated individuals and that this isolation is the result of the circumstances of their births, the nature of their professions, their spiritually isolating religious beliefs, and their attitudes toward their fellow men.

Seismic base isolation has become an increasingly common approach to reduce earthquake induced losses. Base isolation aims to decouple structures, such as buildings or bridges, from strong ground motions through the introduction of a flexible layer, typically located at the foundation. Base isolation is a well-established concept and accepted as an effective method of protecting both the structure and its contents from damage due to earthquakes. Elastomers are ideal for base isolation due to their soft material properties and ability to undergo large recoverable strains. Steel-reinforced elastomeric isolators (SREIs) have been widely applied as base isolators; however, the weight and cost of SREIs have been perceived as barriers to the widespread application of base isolation. In order to alleviate these concerns, it has been proposed that the steel reinforcement could be replaced with lighter fiber reinforcement with similar tensile properties as steel. Recent investigations have demonstrated that fiber-reinforced elastomeric isolators (FREIs) are viable and have desirable characteristics. An additional proposed cost saving measure was to place the FREI unbonded between the upper and lower supports. The combination of the flexible fiber reinforcement and the unbonded application resulted in a unique rollover deformation under horizontal displacement. Rollover causes a nonlinear force-displacement relationship characterized by a softening and stiffening phase. This nonlinear relationship is believed to be advantageous and to allow the performance of the device to be tailored to the earthquake hazard level. This work investigates the adaptive characteristics of unbonded FREIs. It is demonstrated that the softening and stiffening characteristics of the isolator can be altered through modifications to the isolator or to the surrounding support geometry. Equations are developed to predict the horizontal force-displacement relationship. Furthermore, simple expressions appropriate for use in building and bridge design codes are proposed for critical isolator properties. Potential limitations introduced due to the unbonded application are identified and addressed through the development of a new partially bonded hybrid isolator. It is demonstrated that unbonded FREIs are highly versatile and a potentially competitive device appropriate for widespread application in developed and developing countries. / Thesis / Doctor of Philosophy (PhD) / Earthquakes remain a significant and potentially devastating threat to both developed and developing countries. Structural elements within a building, such as beams and columns, must deform considerably to accommodate the relative floor displacements that develop due to ground motion. Conventional construction materials are not capable of undergoing these large deformations without irreversible and potentially catastrophic damage. The introduction of a flexible layer at the foundation level of a structure, using elements known as isolators, can dramatically reduce damage. The deformation is concentrated at the flexible layer, which can undergo large displacements without any damage. This concept, known as base isolation, protects both the structure and its contents. Traditional isolators are expensive, thus far hindering the application of base isolation systems. A novel isolator design has been proposed that has the potential for widespread economical application. To increase the application, building codes need to be developed, requiring substantial research on the isolator properties. A key component of the novel isolator is the ability to alter the isolator geometry to further enhance the response. This is validated through experimental testing and complex computer models.

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This dissertation explores the lived experiences of workers who are involuntarily socially isolated in their work-places through the actions of one or more colleagues. This hermeneutic phenomenological inquiry is called by the question, "What is the lived experience of other-imposed social isolation in the work-place?" This study also explores the ways these targeted workers are lost and forgotten, by themselves and others, for the periods of time they remain in their socially isolating work-places. The tradition of hermeneutic phenomenology grounds this inquiry, guided primarily by the works of Martin Heidegger, Jean-Paul Sartre, and Martin Buber, and to lesser and varying degrees by David Abram, Hans-George Gadamer, Edmond Husserl, David Michael Levin, Emmanual Levinas, and Maurice Merleau-Ponty. Max van Manen's six methodological guidelines serve as the framework for the research activities that comprise this study. From conversations with, and written reflections from, eight work-place professionals, this study reveals what it is like to experience other-imposed, work-place social isolation. Through hermeneutic phenomenological exploration, the stories of these eight workers reveal lived experience along three primary themes. First, other-imposed social isolation is abusive power and control that is comprised of shameful, indecent acts. Second, the targets of involuntary social isolation experience relentless, wounding trauma. Third, while remaining in their socially isolating work-places, and sometimes for years after leaving, targeted workers bear the burdened weight of crushing grief. The study suggests a need to expose antiquated, yet accepted, work-place mores, that serve as unconscious barriers to work-place respect and dignity. Further, the study reveals that conscious, and conscientious, awareness and attention to abusive work-place social isolation are the responsibility of each and every work-place citizen. Finally, the study recommends meaningful citizen choices -- such as refusing silence; standing alone, if necessary; and inviting work-place community attention -- to engage with others where workers' truths and dignity are at stake. / Ph. D.

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published_or_final_version / Community Medicine / Master / Master of Public Health

The use of base isolation to help mitigate and reduce the effects of earthquake excitations has become common place on many important structures. There is also a larger amount of heavier machinery and equipment being stored in some of these important structures; this means that there is a possibility that there are mass irregularities with in a structure. While the response of structures that have been base isolated has been studied they are typically design with floors having a uniform mass. This thesis investigates how mass irregularities affect the response of the floor accelerations and interstorey drifts within a flexural structure with and without a base isolation unit. The ductility demand of the isolator unit is also investigated at during the course of the analysis. The reason for observing the response of the structure is because often in building design there is a need to have floors that have larger masses then the rest of the structure, and understanding how these mass irregularities affect the response of the structure, then the designing of such structures will be simpler during the initial concept stage.

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