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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Cost-Benefit Analysis as Democratic Ritual: The Controversy Over a Proposed Uranium Mining and Milling Project in Virginia (1981-2013)

de Souza, Charles Robert 26 June 2018 (has links)
This dissertation explores the role of science and technology in democracy and the use of cost-benefit analysis (CBA) through an illustrative case on a uranium mining controversy in the US state of Virginia. Arguably, traditional STS scholarship has primarily served what we might call an unmasking function by working to expose political, cultural, gender, corporate, and other factors that get masked by the cultural authority of scientific expertise. Following the lead of other STS scholars seeking to move beyond an unmasking-only mode of scholarship, this dissertation offers a novel take on the relationship between expertise and public controversy over technoscience by suggesting that cost-benefit analysis might serve a beneficial pro-democratic ritual role. To explore this question of the role played by expertise and what we might learn and recommend from approaching CBA as a democratic ritual, I consider the case of a uranium mining and milling controversy in Virginia. This controversy surfaced in two distinct historical moments and prominently featured technical studies utilizing expert predictive methods. I analyze these texts from the perspective of the sociopolitical ritual theory developed in the dissertation and then suggest a set of recommendations regarding how we might humanize and deploy CBA within the context of enhancing rituals that serve to maintain liberal democratic political imaginaries. / Ph. D. / This dissertation explores the role of science and technology in democracy and the use of cost-benefit analysis (CBA) through an illustrative case on a uranium mining controversy in the US state of Virginia. Ultimately, this research offers a novel take on the relationship between expertise and public controversy over technical and scientific projects by suggesting that cost-benefit analysis might serve a beneficial ritual role. After articulating a conceptual framework and analyzing a series of technical studies, a set of recommendations regarding the use of cost-benefit analysis within the context of democratic policy-making is articulated.
2

Valorisation des gisements de flexibilité dans les investissements de smart grid / Impact of demand response on investment in smart grid

Battegay, Archie 09 October 2015 (has links)
Les travaux de recherche présentés dans ce mémoire visent à évaluer des économies d'investissement inhérentes à l'implémentation du pilotage de charge. Pour ce faire, l'approche que nous avons proposée s'inscrit dans l'analyse de l'adéquation des infrastructures électriques avec les projections de la demande. Dans cette perspective, les travaux de modélisation que nous avons développés s'articulent en trois étapes. Premièrement, la capacité du pilotage de charge à modifier les appels des consommateurs a été évaluée. Le modèle que nous proposons tient à la fois compte des effets de bord des effacements de consommation et des limites de disponibilité des flexibilités des consommateurs. Sur la base de cette modélisation, nous avons proposé un modèle évaluant l'apport de ce pilotage pour l'équilibre offre-demande à long terme. Ce modèle quantifie les économies d'investissement dans les capacités de production que pourraient permettre des flexibilités au sein de la demande électrique. Enfin, nous avons complété cette approche en évaluant l'impact de ces flexibilités dans le dimensionnement des réseaux électriques. L'application de nos modèles à un scénario énergétique élaboré au sein du projet GreenLys a permis de dégager quelques conclusions importantes. Ainsi, l'essentiel des économies d'infrastructures induites par le pilotage de charge concerne les capacités de production. Néanmoins, une utilisation des flexibilités des consommateurs optimale pour l'équilibre offre-demande se traduit localement par des coûts d'infrastructure accrus. En particulier, nos simulations mettent en évidence qu'un tel pilotage de charge, optimal à l'échelle nationale, induit localement une augmentation des transits sur les heures les plus chargées de l'année. Aussi, nous avons montré que des modifications ponctuelles des programmes d'appel optimaux pour l'équilibre offre-demande suffisent à dégager des bénéfices pour l'ensemble du système électrique. Dans le cadre de notre étude, ces modifications sont motivées par les situations de défaillance probable des réseaux. Ces défaillances résultent de la concomitance d'aléas climatiques et techniques défavorables. L'analyse que nous avons produite révèle qu'en l'absence de prise en compte de la situation spécifique des réseaux de distribution, les intersaisons et les heures creuses pourraient devenir plus critiques dans la gestion de ces réseaux qu'elles ne le sont aujourd'hui. / The research presented in this report aims to evaluate investment savings related to the implementation of direct load control. To this end, the proposed approach fits into the framework of system adequacy analysis. In this perspective, the models that we have developed are structured in three stages. First, the ability of the direct load control to change consumer demand has been evaluated. The model we have proposed takes into account the side effects of load shedding and the limits of the consumer availability . Based on this model, we have proposed a model in order ro assess the contribution of this control to the long-term supply-demand balance. This model quantifies the investment savings in production capacity led by electric demand flexibilities. Finally, we completed this approach by evaluating the impact of these flexibilities in the design of electrical networks. These models have been applied to an energy scenario that has been developped in the GreenLys project. The simulations led to indentifysome important conclusions. Thus, most of the infrastructure savings induced by direct load controls deal with production capacities. Nevertheless, the optimal use of flexibilities optimal for consumer supply-demand balance is reflected locally by an increase in networks costs. In particular, our simulations show that such a load control strategy, which is optimal on the national level, locally induces an increase in power flows during the most loaded period of the year. Also, we have shown that slight modifications in consumers call programs are sufficient to generate profits for the entire electrical system. In the context of our study, these changes are motivated by the possible networks failures. These failures result from the conjunction of unfavorable climatic and technical hazards. The analysis that we have produced shows that misconsidering the specific situation of distribution networks could lead the shoulder season and the off-peak hours to become more critical in the management of these networks.

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