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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.
101

Sistemática e tafonomia de microfósseis vasiformes neoproterozoicos do Brasil e seu significado paleoecológico e filogenético. / not available

Soares, Luana Pereira Costa de Morais 09 October 2017 (has links)
Esta pesquisa investigou microfósseis neoproterozoicos em forma de vaso (\"vase-shaped microfossils - VSMs\") da Formação Urucum (Grupo Jacadigo) e Formação Bocaina (Grupo Corumbá), ambas inseridas na Faixa Paraguai Sul, Brasil. Estes microfósseis foram comparados a outras ocorrências neoproterozoicas no mundo. O objetivo foi contribuir com o conhecimento de aspectos paleobiológicos, evolutivos e bioestratigráficos relacionados ao aparecimento de eucariontes unicelulares tecados em ecossistemas anteriores ao surgimento dos metazoários. Os VSMs podem ser atribuídos a quitinozoários, tintinídeos e foraminíferos, porém, características diagnósticas importantes apontam o grupo Amoebozoa como afinidade biológica mais próxima. A variedade morfológica e composicional observada em VSMs neoproterozoicos, inclusive nos exemplares brasileiros, documenta a mais antiga diversificação da vida unicelular eucariótica, presumivelmente heterotrófica, preservada no registro geológico. As diferentes fácies sedimentares contendo VSMs fornecem informações valiosas sobre fatores ambientais que podem ter sido importantes na diversificação bem como no seu possível desaparecimento entre o Neoproterozoico e o Mesozoico. Além disso, a ampla distribuição e variedade desses microfósseis sugerem uma possível aplicação bioestratigráfica. Microscopia petrográfica (MP) e Eletrônica de Varredura (MEV), Espectrometria de Energia Dispersiva de Raios X (EDS), Microscopia Confocal (MC), Espectroscopia Raman (ER), Catodoluminescência (CL) além de técnicas geoquímicas e geocronológicas foram aplicadas para caracterizar a composição e morfologia dos microfósseis, bem como para a rocha encaixante, visando inferir a natureza e paleoecologia dos organismos responsáveis pelas produção das tecas e o ambiente em que viveram, se diversificaram e desapareceram. / This research investigated vase-shaped microfossils (VSMs) from the Urucum Formation (Jacadigo Group) and Bocaina Formation (Corumbá Group), both inserted in the Southern Paraguay Fold Belt, Brazil. These microfossils were compared to other neoproterozoic occurrences in the world. The aim was to contribute to the knowledge of paleobiological, evolutionary and biostratigraphic aspects related to the appearance of unicellular eukaryotes in the ecosystems that preceed the appearance of metazoans. VSMs can be attributed to quitinozoan, tintinids and foraminifera, but important diagnostic features point to the Amoebozoa group as the closest biological affinity. The morphological and compositional variety observed in neoproterozoic VSMs, including Brazilian specimens, documents the earliest diversification of eukaryotic unicellular life, presumably heterotrophic, preserved in the geological record. The different sedimentary facies containing VSMs provide valuable information about environmental factors that may have been important in the diversification as well as their possible disappearance between the Neoproterozoic to the Mesozoic. In addition, the wide distribution and variety of these microfossils suggest a possible biostratigraphic application. Petrography, Scanning electron microscopy, Confocal microscopy, Energy-dispersive X-ray spectroscopy, Raman spectroscopy, Cathodoluminescense, besides geochemical and geochronological techniques, were applied to characterize the composition and morphology of the microfossils, as well as for the host rock, in order to infer the nature and paleoecology of the organisms responsible for the production of the test and the environment in which they lived, diversified and probably disappeared
102

Two Ways of Burning a Cotton Field

Lindstrom, David James 01 March 2018 (has links)
TWO WAYS OF BURNING A COTTON FIELD is an ethnographic memoir concerning the narrator’s experiences as a Peace Corps volunteer in Paraguay, South America. The plot is structured around a moral crisis in his rural Paraguayan village. The narrator’s neighbor, a man in his late twenties, threatened to kill his partner and her two children. The Paraguayan police were made aware of the situation but did nothing. Peace Corps management also instructed the narrator to do nothing. In TWO WAYS OF BURNING A COTTON FIELD, this moral crisis is explored within the contexts of post-colonial power structures, including economic and ecologic geographies, intersections of community and government, and the colonial-indigenous language continuum of Paraguay (Spanish-Guaraní). Further, these neighbors’ localized trauma is located within historical, colonial trauma. Of particular concern is the role that languages – English, Spanish, and Guaraní – play in constructing power, worldview, and relationships within the village.
103

El ascenso de la soja en Paraguay : Un estudio de la demanda mundial por la soja

Almerfors, Jacqueline January 2008 (has links)
<p>La producción de soja ha crecido significativamente durante un periodo de 6 años en Paraguay llegado a una cosecha record de 6,2 millones de toneladas en 2007. Este aumento se debe a factores globales como la demanda creciente por la soja para la Unión Europea que va destinada a la producción del biocombustible. El objetivo de este estudio ha sido investigar cual fue la causa que conllevo al aumento de la producción de soja en Paraguay. Con la ayuda de principalmente dos publicaciones, Republicas Unidas de la Soja que es una compilación de ensayos sobre las consecuencias sociales, económicas y ecológicas de la expansión de los monocultivos de soja en Latinoamérica y Refugiados del Modelo Agroexportador que es una publicación de los resultados de una investigación en las comunidades sojeras del Paraguay. Llegamos a la conclusión de que si existe una coherencia entre la demanda mundial por el biocombustible y el aumento de producción de soja.</p>
104

El fenómenó sociológico del trabajo industrial en las misiones jesuíticas

Suárez, Sofía. January 1920 (has links)
Thesis--Universidad Nacional de Buenos Aires, 1917. / Bibliography: p. [388]-398.
105

Communications satellite systems for developing countries /

Horner, Richard Linscott, January 1982 (has links) (PDF)
Tex., Univ. of Texas, Reports Master of Arts--Austin, 1982. / Die Vorlage enth. insgesamt 2 Werke. Includes bibliographical references. Vita.
106

Telecommunications and regional integration : the case of Mercosur

Gama e Souza, Lauro da, 1962- January 1999 (has links)
This masters thesis analyzes telecommunications policies in Argentina, Brazil, Paraguay and Uruguay, and relates these to the ongoing economic integration of these countries within MERCOSUR. To this end, a survey of the telecommunications sector in each of the MERCOSUR countries, depicting the main features of their respective regulatory framework, competition policy, and universal service goals is provided in Part II. Part III briefly describes the GATS/BTA framework and comments on MERCOSUR countries' commitments towards market liberalization. In Part IV, MERCOSUR's legal and institutional framework, along with the common initiatives that have been taken with respect to the telecommunications sector, are considered. By way of conclusion, Part V proposes further reflections on theoretical approaches aimed at framing telecommunications normativity in consideration of its dynamic interaction with globalization and integration in the context of MERCOSUR.
107

Sozialpolitik und entwicklungspolitischer Wandel in Lateinamerika : Konzepte und Reformen im Vergleich /

Sottoli, Susana. January 1999 (has links) (PDF)
Univ., Diss.--Heidelberg, 1998. / Literaturverz. S. 323 - 352.
108

El fenómenó sociológico del trabajo industrial en las misiones jesuíticas

Suárez, Sofía. January 1920 (has links)
Thesis--Universidad Nacional de Buenos Aires, 1917. / Bibliography: p. [388]-398.
109

Intelligence networks and the tri border area of South America /

Wishart, Eric Gregory. January 2002 (has links) (PDF)
Thesis (M.A. in National Security Affairs and Civil-Military Relations)--Naval Postgraduate School, December 2002. / AD-A411 244. Includes bibliographical references (p. 89-93). Also available online.
110

Governmentalities and authorized imaginations : a (non-modern) story about Indians, nature and development /

Blaser, Mario. Feit, Harvey A. January 1900 (has links)
Thesis (Ph.D.)--McMaster University, 2003. / Advisor: Harvey Feit. Includes bibliographical references (leaves 283-319). Also available via World Wide Web.

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