DEA ?? 63, Floating Vessel Blowout Control is a blowout containment study which was completed in 1990, and it did not include discussions about operations in the water depths we currently operate in. As offshore drilling is continuously moving into deeper and deeper waters, a need to further investigate well control and blowout containment in ultradeep water has arisen. This project describes the development and assessment of an electronic cross-reference tool for well control and blowout containment, with added focus on ultradeep water operations. The approach of this manual is fully electronic, thus being able to serve the needs of the engineer/driller with greater ease in both pre-planning and in a stressful onthe- job setting. The cross-reference is a manual for the state of the art in well control and blowout containment methodology. It provides easy-to-use topical organization by categories and subcategories, and aims at providing clear links between symptoms, causes, and solutions. Clear explanations to complicated issues are provided, and confirmation of applicable blowout intervention procedures, be it conventional or unconventional, are discussed. Human error and equipment failure are the causes of blowouts, and they are bound to happen in an ultradeep water environment. Well control events are harder to detect andhandle in ultradeep water, and quick reaction time is essential. After detection and shutin, the Driller??s method is the preferred circulation method in ultradeep water, due to its responsiveness and simplicity. In case kick handling is unsuccessful, contingency plans should be in place to handle a potential blowout. If a blowout does occur, and the blowing well does not self-kill through bridging, a dynamic kill through relief well intervention is likely to be necessary, as underwater intervention is difficult in ultradeep water. With new ultradeep water drilling technologies providing potential for increased performance, alternative well control methods might be necessary. Along with these new technologies follow new unfamiliar procedures, and proper education and training is essential.

Topic modeling is an effective tool for analyzing the thematic content of large collections of text. However, traditional probabilistic topic modeling is limited to a small number of topics (typically no more than hundreds). We introduce fine-grained topic models, which have large numbers of nuanced and specific topics. We demonstrate that fine-grained topic models enable use cases not currently possible with current topic modeling techniques, including an automatic cross-referencing task in which short passages of text are linked to other topically related passages. We do so by leveraging anchor methods, a recent class of topic model based on non-negative matrix factorization in which each topic is anchored by a single word. We explore extensions of the anchor algorithm, including tandem anchors, which relaxes the restriction that anchors be formed of single words. By doing so, we are able to produce anchor-based topic models with thousands of fine-grained topics. We also develop metrics for evaluating token level topic assignments and use those metrics to improve the accuracy of fine-grained topic models.

Submitted by Alessandra Guerra (alessandrareginaguerra@yahoo.com.br) on 2017-10-26T18:31:45Z No. of bitstreams: 1 Tese - Guerra 2017.pdf: 1705383 bytes, checksum: 42c03d58c6a4a179bea55b57e943c94c (MD5) / Approved for entry into archive by Monique Sasaki (sayumi_sasaki@hotmail.com) on 2017-10-31T18:44:16Z (GMT) No. of bitstreams: 1 guerra_ar_dr_sjrp.pdf: 1705383 bytes, checksum: 42c03d58c6a4a179bea55b57e943c94c (MD5) / Made available in DSpace on 2017-10-31T18:44:16Z (GMT). No. of bitstreams: 1 guerra_ar_dr_sjrp.pdf: 1705383 bytes, checksum: 42c03d58c6a4a179bea55b57e943c94c (MD5) Previous issue date: 2017-08-28 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / O objetivo desta tese de doutorado é analisar a diacronia do grau de transparência do sistema de referência por expressão pronominal e desinencial do argumento-sujeito de 1ª e 2ª pessoas no português brasileiro. Especificamente, analisa-se a variação diacrônica do grau de transparência desse sistema decorrente da interação entre três mudanças ocorridas na história da língua: aumento da frequência de expressão pronominal do argumento-sujeito, aumento da frequência de uso do pronome "você" em detrimento de "tu" e aumento da frequência de emprego da forma pronominal "a gente" em prejuízo de "nós". O quadro teórico adotado é constituído por uma articulação entre a Gramática Discursivo-Funcional (HENGEVELD; MACKENZIE, 2008) e um conjunto de trabalhos sobre motivações comunicativas, como iconicidade e economia, determinantes da estrutura das línguas e da dinâmica de processos de mudança diacrônica. O período recortado para estudo estende-se da primeira metade do século XIX ao início do século XXI, e o corpus da pesquisa é composto por peças de teatro brasileiras produzidas nesse período. Os dados apresentados e discutidos mostram que o grau de transparência do referido sistema, no recorte temporal selecionado, oscila em torno de um determinado eixo, variando ora em direção a diminuição, ora em direção a aumento de transparência, não se alterando de forma unidirecional. Argumenta-se, então, que esse resultado estaria vinculado, em grande medida, à atuação igualmente relevante das motivações comunicativas de iconicidade e economia. / This dissertation aims at analyzing the diachronic variation in the degree of transparency of the referential system in Brazilian Portuguese, taking into account the reference to first and second person attained in the expression of Subject argument through pronoun and verbal affix. Specifically, the variation in transparency caused by three diachronic changes is addressed: percentage increase in the pronominal expression of Subject argument, percentage increase in the use of the pronoun "você" ("you") to substitute "tu" ("you"), percentage increase in the use of the pronoun "a gente" ("we") in order to replace "nós" ("we"). The theoretical framework carried out here is drawn from an articulation between Functional Discourse Grammar (Hengeveld & Mackenzie, 2008) and works on communicative motivations such as iconicity and economy, which are considered as forces that determine language structure and diachronic change processes. The historical period analyzed covers the period between the first half of the nineteenth century and the beginning of the twenty-first century, and the corpus of investigation includes Brazilian plays produced during that period. The data show that the degree of transparency of the aforementioned system oscillates around a certain axis, since it sometimes varies towards decrease, sometimes towards increase of transparency, rather than moving in a unidirectional movement. This study argues that this result is associated to a great extent with an equally relevant influence of iconic and economic motivations.