<p> Recently, federal agents across the US have uncovered an unprecedented number of forced labor operations, many involving non-citizens who are forced to perform farm work under threat of violence and deportation. Contemporary scholarship explains this phenomenon as the effect of liberalized economic relations, industrialized agriculture, and consumer demand for cheap products. While instructive, such explanations leave open questions of how historical factors sanction the coercive farm labor relations seen today. Using the genealogical method, this paper examines the history of labor practices in Florida, a state in which forced labor not only flourished before the Civil War, but also in which forced labor remains common today. </p><p> After highlighting how Florida's ante-bellum and post-bellum labor practices and discourses imbued employment with normative valuations, this paper argues that such discourses and practices have since been taken up by state and federal institutions, eventually influencing laws and policies concerning labor, prisoners, and immigrants. These historically embedded practices and discourses, moreover, function to discipline the lives and govern the status of non-citizens in and through employment.</p>

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On numerous occasions Ricoeur has characterized the goal of his philosophical analyses as the "exchange of the ego, master of itself, for the self, disciple of the text." Our investigation follows the development of this theme through careful examination of Ricoeur's phenomenological-hermeneutical philosophy. By way of contrast with Husserl's phenomenology we see how Ricoeur initiates a program of self-recovery that decenters consciousness from the immediacy of self-grounding radicality. Looking instead to the polysemic world of the text, Ricoeur chooses a path of indirect imaginative mediation as the route towards self-interpretation. / The imagination, correlative with the works of culture (signs, symbols and texts), forms the central core of Ricoeur's understanding of selfhood. Already operative in his early publications as the mediating structure of selfhood, the work of imagination is transformed from a transcendental third term into a linguistic process that constructs sonorous worlds in front of consciousness for the self to inhabit. / Ricoeur's analysis of metaphor and narrative shows selfhood to be a task accomplished by means of linguistic interpretation. However, such an interpretation of the self, with the textual world as its other, is a linguistic construction that is caught up in semantic self-identification. Ricoeur's program for the exchange of the self-enclosed ego, for a self discipled by the text, becomes entangled in the semantics of identity to such an extent that selfhood is equated with the objectifications of the reflective process and is never dealt with on the intimate level of the reflexive structure of the self in relation to otherness. This has significant consequences which need to be critically examined by philosophy of religion.

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This thesis examines the philosophical implications of the assumptions made by researchers involved in the development of mathematical models of metabolism. It does this through an analysis of several detailed historical case studies of models between the 1960’s and the present day, thus also contributing to the growing literature on the historiography of biochemical systems biology. The chapters focus on four main topics: the relationship between models and theory, temporal decomposition as a simplifying strategy for building models of complex metabolic systems, interactions between modellers and experimental biochemists, and the role of biochemical data. Four categories of assumptions are shown to play a significant role in these different aspects of model development; ontological assumptions, idealising assumptions, assumptions about data, and researchers’ commitments. Building on this analysis, the thesis brings to light the importance of researcher’s ontological and idealising assumptions about the temporal organisation, alongside the spatial organisation, of metabolic systems. It also offers an account of different forms of interactions between research groups – hostile interactions, closed collaboration, and open collaboration – on the basis of differences in the characteristics of researcher’s commitments. Throughout the case studies, biological data play a powerful role in model development by virtue of the contents of available data sets, as well as researchers’ perceptions of those data, which are in turn influenced by their ontological assumptions. The historical trajectories explored illustrate how the relationships between different facets of model building, and their associated philosophical abstractions, are often best understood as transient features within a highly dynamic research process, whose role depends on the specific stage of modelling in which they are enacted. This thesis provides an expanded perspective on the different types and roles of assumptions in the development of mathematical models of metabolism, which is firmly grounded in a historical analysis of scientific practice.

Orientador: Ubirajara Rancan de Azevedo Marques / Banca: Marco Aurélio Werle / Banca: Clélia Aparecida Martins / Mestre

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