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Two-thirds of submarine volcanism in the Earth's ocean basins is manifested along mid-ocean ridges and the remaining one-third is revealed along intraoceanic arcs and seamounts. Hydrothermal systems and the circulation patterns associated with these volcanic settings remove heat from the solid Earth into the deep ocean. Hydrothermal circulation continues to remove and redistribute heat in the crust as it ages. The heat and mass fluxes added to the deep ocean influence mixing in the abyssal ocean thereby affecting global thermohaline circulation. In addition to removing heat, hydrothermal processes extract chemical components from the oceanic and carry it to the surface of the ocean floor, while also removing certain elements from seawater. The resulting geochemical cycling has ramifications on the localized mineral deposits and also the biota that utilize these chemical fluxes as nutrients. In this dissertation, I analyze observed conductive heat flow measurements in the Panama Basin and borehole thermal measurements in Brothers Volcano and use mathematical models to estimate advective heat and mass fluxes, and crustal permeability. In the first manuscript, I use a well-mixed aquifer model to explain the heat transport in a sediment pond in the inactive part of the Ecuador Fracture Zone. This model yields mass fluxes and permeabilities similar to estimates at young upper oceanic crust suggesting vigorous convection beneath the sediment layer. In the second manuscript, I analyze the conductive heat flow measurements made in oceanic between 1.5 and 5.7 Ma on the southern flank of the Costa Rica Rift. These data show a mean conductive heat deficit of 70%, and this deficit is explained by various hydrothermal advective transport mechanisms, including outcrop to outcrop circulation, transport through faults, and redistribution of heat by flow of hydrothermal fluids in the basement. In the third manuscript, I analyze the borehole temperature logs for two sites representative of recharge and discharge areas of hydrothermal systems in the Brothers Volcano. I develop upflow and downflow models for fluids in the borehole and formation resulting in estimated of flow rates and permeabilities. All three independent research works are connected by the common thread of utilizing relatively simple mathematical concepts to get new insights into hydrothermal processes in oceanic crust. / PHD / Two-thirds of underwater volcanic activity in the Earth’s ocean basins is exhibited in areas where new material for Earth’s outer shell is created and the remaining one-third is displayed along areas where the outer shell is destroyed. In these areas, hot springs that are under water and their water movement patterns remove heat from the solid outer shell and puts it into the deepest parts of the ocean. Hot water circulation continues to remove and redistribute heat and various chemical elements in the shell as it grows old. This heat and chemical elements, which get added to the deep ocean water, influences the way water mixes and forms layers in the world oceans. This also affects the movement of ocean currents. The chemical elements removed from the shell by hot water gets deposited as minerals on the ocean floor in places where hot springs arise. This variety of minerals provides nutrients for different marine organisms. In this work done during my PhD studies, I examine the heat and temperature that was measured in the Panama Basin and Brothers Volcano. I utilize these examinations to build simple math models to find out how much heat and chemical components are being added to the deep ocean water. I also find out the methods in which the hot water springs appear on the ocean floor and the patterns in which the hot water circulates in the Earth’s outer shell. All of these estimates will help the scientists who are studying the patterns and changes in ocean currents by giving them a number on how much heat is released from the inside of the Earth.

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Les ‘Panama papers’ (2016) représentent une fuite de 11,2 millions de documents issus de la firme panaméenne Mossack Fonseca. Les révélations exposent des conduites fiscales compromettantes relevant de la finance offshore, soulignant par le fait même l’implication d’acteurs sociaux, parmi lesquels des banques, politiciens, chefs d’entreprises, responsables politiques et économiques, fortunes familiales, etc. D’une envergure internationale, les ‘Panama papers’ ont marqué l’univers médiatique de façon importante, toutefois en référence au jeu d’interprétation entourant les conduites exposées, il est possible de souligner le pluralisme des réactions sociales. S’intéressant particulièrement aux figures politiques et économiques listées, le mémoire se présente sous la forme de trois études de cas : Sigmundur David Gunnlaugsson, premier ministre de l’Islande (de 2013 à 2016), David Cameron, premier ministre du Royaume-Uni (de 2010 à 2016) et Malcom Turnbull, premier ministre de l’Australie (de 2015 à 2018). Le mémoire vise à dégager deux niveaux d’analyse. D’une part, détailler la couverture médiatique respective des cas, cela dans le but de saisir les réactions sociales suscitées, en particulier lors de la production et l’évolution des discours publics. D’autre part, il s’agit d’objectiver et discerner les prises de positions et de défenses à l’utilisation de comptes offshores, ce mémoire s’inscrivant dans le prolongement des études portant sur la résistance au stigmate. Afin de mener à terme la recherche, un corpus incluant treize références de la presse écrite a été constitué, représentant une analyse approfondie du contenu de plus de 671 documents écrits parus entre le 3 avril et le 30 septembre 2016. En s’appuyant sur les prémisses théoriques de la sociologie du scandale, la recherche illustre, dans les cas présents, différentes finalités possibles à l’épisode des ‘Panama papers’ : scandale, affaire ou non-scandale. / The Panama Papers (2016) represent a leak of 11,2 million documents from the Panamanian firm Mossack Fonseca. The revelations exposed compromising tax practices relating to offshore finance, and highlights by the same token, the involvement of the players : banks, politicians, business leaders, political and economic leaders, family fortunes, etc. Of an international scope, the 'Panama papers' have marked the media world in an important way. In reference to the interpretation game surrounding the exposed behaviors, it is possible to emphasize the pluralism of social reactions. Focusing on the listed political and economic figures, the document is presented in the form of three case studies : Sigmundur David Gunnlaugsson, Iceland’ prime minister (2013-2016), David Cameron, UK’ prime minister (2010-2016) and Malcom Turnbull, Australia’ prime minister (2015-2018). The thesis aims to identify two levels of analysis. The first level of analysis details the respective media coverage of the cases. The goal is to collect the social reactions, the production and the evolution of the discourse. The second level of analysis objectifies and discerns positions and defenses used with offshore accounts, whereas the writings of the dissertation are an extension of studies on the resistance of the stigma. In order to complete the research, a corpus including thirteen references of the written press was gathered, representing a thorough analysis of the contents of more than 671 written documents published between April 3 and September 30, 2016. Based on the theoretical premises of the sociology of scandal, the research illustrates, in the present cases, different possible outcomes to the episode of the 'Panama papers' : scandal, affair, or non-scandal.

Approved for public release, distribution is unlimited / This thesis focuses on the regional response to the crisis in Colombia. The major conclusions of the thesis are that the crisis directly affects the security of Colombia's neighbors; that the use of military force will be the most important element in a strategy to restore security and that the Colombian military will require external military assistance to do so; that while Colombia's neighbors have traditionally rejected ideas of intervention, there are indications that they may be willing to participate in such an endeavor; and that while less politically risky courses of action are more likely to occur, a regional military force operating in a peacemaking role will be the most effective course of action towards restoring security in Colombia and the region. These conclusions are reached through an examination of the conflict's effect on Colombia and its neighbors, the capabilities of the Colombian security forces, the history of regional cooperative efforts, and recent political rhetoric and policy decisions region-wide. / Major, United States Marine Corps

This research examines the applicability of the Kindernothilfe self-help group approach among the Ngäbe indigenous people in Panama from the perspectives of complex system theory and development as empowerment. It is based on an extensive literature review and an empirical qualitative study with focus group discussions and expert interviews following the grounded theory method. The dissertation displays the multiple dimensions that have reverberated to poverty and to the failure of development and most group approaches in the Ngäbe region. Nevertheless, it indicates that a culturally fitting self-help group concept could become a promising approach to empowering the Ngäbe people. Some crucial adaptations, however, are necessary. The most significant change regards the suggestion to work with mixed-sex ‘family groups’ that combine peer group meetings and joint gatherings. It represents the most suitable approach both from the perspective of the Ngäbe people and from the viewpoint of gender mainstreaming and complexity. / Development Studies / M.A. (Development Studies)

Title from PDF of title page. / Document formatted into pages; contains 558 pages. / Original thesis submitted in HTML and can be accessed at http://www.lib.usf.edu/ETD-db/theses/available/etd-10122001-142859/unrestricted/frame.html / td.pdf / Thesis (M.S.)--University of South Florida, 2002. / Includes bibliographical references. / Text (Electronic thesis) in PDF format. / ABSTRACT: The Gatun Structure, (Latitude N 09° 05&softsign; 58.1", Longitude W 79° 47&softsign; 21.8", situated in the triple-canopy rainforest 10 km to the WSW of the Gamboa and about 2 km south of the Isle of Barbacoas, Republic de Panama), is a partially inundated, quasi-concentric surface feature 2.2 - 3km in diameter, which appears in aerial photographs and in radar imagery as an arcuate chain of islands with a raised center. Although the structure has been heavily weathered and altered, it has retained morphology consistent with complex craters: an elevated circular central uplift 500-600 m in diameter and 50m high, and arcuate boundary ridges (a rim structure?) ranging from 50-100 meters high. Within the central peak, highly altered and fractured siltstone of the Gatuncillo (?) formation (Eocene) (+-) older rocks are uplifted and exposed through surrounding calcareous units of the Caimito formation (Oligocene) and the Las Cascadas formation (Miocene), the major target rocks in the region. / ABSTRACT: Lithologies in the structure include highly fractured siliciclastic rocks (siltstone, sandstones and greywackes), limestones with anomalous spherical glass inclusions, both black and white hypocrystalline glasses (possible melt rocks), lithic fragmental breccias, and melt-bearing breccias (possible impact melt breccias and suevites), some of which contain flow banding and evidence for selective melting of minerals. Three types of spherules (glass, fluid-drop and lithic), a pyroxene-quartz "necklace" disequilibrium structure (coronas), plagioclase feldspars exhibiting mosaicism and partially amorphization, possible liquid immiscibility between melts of calcite and felpspathic glass, as well as decomposition of titanomagnite or ulvospinel, are all petrographic indicators of a hypervelocity impact event. / ABSTRACT: The structure is crosscut by numerous dikes of unshocked basalt and basaltic andesite related to volcanism along the Panamanian segment of the Central American arc to the south. However, the lithologies of the Gatun Structure are chemically inconsistent with the regional volcanic rocks and the unshocked volcanic rocks that crosscut the structure. The lack of an igneous relationship between the Gatun structure and the explosive volcanism of Panamanian arc the presence of classical shock lithologies within the site, and the occurrence of spherules, maskelynite and other disequilibrium shock features in the rocks, an impact origin is our preferred interpretation for the Gatun structure. / System requirements: World Wide Web browser and PDF reader. / Mode of access: World Wide Web.

New Caledonia (1698-1700) was Scotland’s largest independent colonial venture. The scheme’s collapse crippled the country financially and was an important factor in the Anglo-Scottish Union of 1707. This project explores the identity of Scottish settlers who attempted to colonize the Darien region of modern Panama. Colonial identity is assessed by reconstructing the Scottish dialogue about the natural world, the aboriginal population, and the commonwealth. I contend that the ideology of improvement that shaped Scottish perceptions of utility and fertility in the Darien became a powerful moral discourse used to critique the colonists. This paper also chronicles Scottish aspirations to found an empire of trade and civility, uncovering the fundamental problems created by the idealization of the Tule as eager subjects of this new empire. Finally, I argue that Caledonia’s food shortages not only threatened the colonial government’s legitimacy, they also exposed divergent ideals of the commonwealth among the settlers.

New Caledonia (1698-1700) was Scotland’s largest independent colonial venture. The scheme’s collapse crippled the country financially and was an important factor in the Anglo-Scottish Union of 1707. This project explores the identity of Scottish settlers who attempted to colonize the Darien region of modern Panama. Colonial identity is assessed by reconstructing the Scottish dialogue about the natural world, the aboriginal population, and the commonwealth. I contend that the ideology of improvement that shaped Scottish perceptions of utility and fertility in the Darien became a powerful moral discourse used to critique the colonists. This paper also chronicles Scottish aspirations to found an empire of trade and civility, uncovering the fundamental problems created by the idealization of the Tule as eager subjects of this new empire. Finally, I argue that Caledonia’s food shortages not only threatened the colonial government’s legitimacy, they also exposed divergent ideals of the commonwealth among the settlers.

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