Thesis (Ph. D.)--Washington University, 1982. Dept. of History. / Typescript. Includes bibliographical references (leaves 543-568).

Dissertation--Fachbereich Philosophie und Geschichtswissenschaft--Universität Hamburg, 2004. / Bibliogr. p. 302-317.

Pomacea canaliculata es un gasterópodo dulceacuícola perteneciente a la familia Ampullariidae, cuyo rango natural de distribución se extiende desde el sur de Brasil hasta el sur bonaerense. Esta especie ha sido introducida accidental o intencionalmente en numerosos países, y es considerada uno de los 100 peores invasores a nivel mundial. El objetivo de esta tesis fue analizar los determinantes de la distribución espacial de P. canaliculata a distintas escalas espaciales. Específicamente se estudió el grado de dependencia de la respiración aérea, la velocidad de desprendimiento, el efecto de la corriente sobre la dispersión y el efecto de la temperatu-ra y el tiempo de exposición sobre la actividad. También se caracterizó cuantitativamente su microhábitat y se exploraron la distribución entre y dentro de los arroyos de la cuenca de las Lagunas Encadenadas del Oeste y sus patrones tempora-les de actividad. Los resultados obtenidos aquí mostraron que la restricción en la respiración aérea afecta negativamente la actividad y la supervivencia y que sus efectos empeoran con la temperatura y la polución del agua. La actividad se incre-menta con temperaturas entre 10 y 30C pero el tiempo de exposición carece de importancia, salvo a temperaturas superiores a 30C y en aguas polutas. La velocidad de desprendimiento fluctuó entre 0.07 y 1.64 m.s-1, indicando que P. canaliculata puede soportar, por un período corto, velocidades que se encuentran entre las máximas registradas en los arroyos de la cuenca de las Encadenadas del Oeste. Velocidades de la corriente menores a 0.3 m.s-1 no influyen sobre la tasa y dirección de dispersión por reptación. No hay una respuesta reotáctica positiva que compense los eventos de deriva aguas abajo, probablemente dificultando la coloniza-ción de tramos cercanos a las sierras. Los microhábitats más utilizados por esta especie se caracterizaron por su proximi-dad a la orilla o a sustratos emergentes aptos para ventilar el pulmón, velocidades de la corriente que no interfieren con las actividades de rutina (menores a 0.3 m.s-1) y sedimentos finos ricos en materia orgánica o abundancia de macrófitas y detritos. La efectividad de algunas medidas de control podría incrementarse reuniendo esfuerzos donde se concentran los caracoles debido a su dependencia del acceso al aire. El por-centaje de caracoles activos en la cuenca de las Encadena-das del Oeste fluctuó entre 0 y 100% durante el año. En la estación fría la mayoría de los caracoles estaban inactivos pero aparentemente no entran en un estado letárgico profundo y persistente, sino que muestran una respuesta rápida a cambios de temperatura, reactivándose tan pronto como las condiciones sean favorables. A pesar de que algunas variables ambientales influyeron sobre la distribución de P. canaliculata entre y dentro de los arroyos de la cuenca de las Encadenadas del Oeste, ninguna resultó determinante de su presencia. Todos los arroyos serían habitables para esta especie, aunque sólo en algunos las poblaciones podrían permanecer a largo plazo. Probablemente, las condiciones climáticas e hidrológicas, muy variables e impredecibles en esta región, sean determinantes de eventos de extinción-colonización y, en consecuencia, de su distribución en esta cuenca. / Pomacea canaliculata is a freshwater snail belonging to the family Ampullariidae, whose natural range of distribution extends from southern Brazil to southern Buenos Aires Province in Argentina. This species has been introduced either accidentally or intentionally to many countries and is considered to be one of the 100 worst invaders worldwide. The aim of this thesis was to analyze the determinants of the spatial distribution of P. canaliculata at different spatial scales. Specifically, the dependence on aerial respiration, the effect of water velocity on detachment and dispersal, and the effects of temperature and exposure time on activity were investigated. In addition, its microhabitat was characterized quantitatively and the distribution among and within streams in the Encadenadas del Oeste basin (Buenos Aires Province, Argentina) and the temporal patterns of activity were explored. The experimental results showed that a restriction in aerial respiration negatively affected activity and survival and that its effects worsened with increasing temperatures and water fouling. Activity increased with temperature between 10 and 30C but exposure time was irrelevant, except at temperatures above 30C and in fouled waters. The detachment velocity ranged from 0.07 to 1.64 m.s-1, indicating that P. canaliculata can resist, at least for short periods, velocities that were among the highest recorded in the streams of Encadenadas del Oeste basin. Current velocities below 0.3 m.s-1 did not influence dispersal rate and direction by crawling. A positive rheotactic response able to compensate the natural events of downstream drifting was not evident, so that the colonization of piedmont sections is unlikely. The microhabitats most frequently used by this species were characterized by their proximity to the shore or an emergent substratum suitable for lung ventilation, by water velocities not interfering with routine activities (below 0.3 m.s-1), and by fine sediments rich in organic matter or abundance of macrophytes and detritus. The effectiveness of some control measures could be increased by focusing efforts on areas where the snails are concentrated due to their dependence on access to air. The percentage of active snails in Encadenadas del Oeste basin fluctuated between 0 and 100% along the year. During the cold season most of the snails were inactive though they apparently not enter a deep and persistent lethargic state but show a rather quick response to temperature changes, being able to reactivate as soon as conditions become favorable. Despite the fact that some environmental variables influenced the distribution of P. canaliculata among and within the streams of Encadenadas del Oeste basin, none was determinant of its presence. All streams would be habitable for this species, but only in some of them populations would be able to persist long term. Probably, the climatic and hydrological conditions, which are highly variable and unpredictable in this region, are determi-nants of extinction-colonization events and, consequently, of its distribution in the streams of this basin.

No description available.

This thesis analyzes an alternative public evaluation on students' performance which has affected the educational system of the City of Buenos Aires (Argentina) since 1992. This evaluation program intends to solve some key dilemmas of the evaluation policy: issues on equity, participation, trustworthiness, comparability and authenticity of the evaluated information. The study focuses on the potential, insight and barriers of this evaluation program. The relevance of this program lies in the fact that it was designed to make a contribution to the democratization of educational administration and to resist some authoritarian effects of a surrounding regional and global context of neoliberal educational reforms. This work also aims at capturing the perspectives about the hegemonic and alternative public policies of centralized evaluation, and collaborative leadership in education held by the contemporary Argentine leaders in education. / This research makes a contribution to the fields of Policy Studies and Leadership in Education and the arena of public evaluation policies, while maintaining a pedagogic perspective of the issues under analysis. The main contribution of the study is that it shows that it is possible to try alternative ways to solve the current political necessity to evaluate large amounts of students in order to inform the educational politics and policies, and at the same time, to attach the evaluation to teachers' and student's pedagogic needs, by involving educators and administrators in central places of the evaluation design and implementation. / The political and theoretical perspective adopted is consistent with a critical socio-pedagogy. Methodologically, this research is a case study oriented by a qualitative methodology, which combines two main techniques: documentary exploration and interviews to 19 leaders of different rank within the analyzed Argentine jurisdiction. The interpretation process, in both the document review and the interviews, is led by a threefold analysis: comprehensive, ethnographic and critical.

Texte remanié de: Dissertation--Philosophische Fakultät--Bonn--Rheinische Friedrich-Wilhelms-Universität, 2003. / Textes en allemand et espagnol. Bibliogr. p. 335-352.

Thesis (Ph. D.)--UCLA, 2008. / Vita. Includes bibliographical references (leaves 413-442).

The main goal of this project is to achieve successful architecture regarding its creativity and authenticity. It is always the content, not the aesthetic, that forms the basis for the final evaluation of design. Thus, the main intention is to bring together -in a design- issues from three different circumstances: the 'present' situation -a personal view of femininity and women's permanency in dwelling, the 'past' cultural background -tradition in the "porteria" culture- and its evolution and the 'future' possible direction of society -the critical innovative thought through the project. The reaching of the 'concept' in the architecture makes a design authentic. "True architecture does not just agree with [essence] but also asserts the agreement." (Kaersten Harries, Representation and Re-presentation in Architecture, 1988). Ludwig Wittgenstein, an Austrian philosopher of the 1940's, defines architecture as the 'innovative critical thought' of a given situation summarized in a concept -idea, emotion, intention- which is translated and transformed into visual representation to be understood by the designer, and then communicated and shared with society."Remember the impression one gets from good architecture;that it expresses a thought "(Ludwig Wittgenstein, 1940's)The proposed approach concerns itself with the idea of un-veiling and re-vealing the hidden knowledge in the design actions that architects make in their search for realization. These actions are both conscious and unconscious, where accidents also occur allowing for the limitlessness characteristic of the design process. In this way, the objective of this journey of exploration is to find and visualize those steps that architects take while designing. The process of design is very rich in options and in alternatives. It is also rich in its detours and deviations. When all the stages are seen and visualized to the point of bringing them into the consciousness, the design in itself becomes richer and is taken to a further and more profound definition.The underlying ideas of the creative thesis is segmented into attitudes that give shape to the final project. Each attitude is a constituent concept of the end design. The blending and fusion of these diverse issues are perceptible in the final venture. These components begin appearing with the first attempt, evolve in the next various undertakings, and are finally intertwined in the last design."To explain howsbvctures come to hare specific designs[..) we must examine the design process. In particular, we mustidentify thegeneral causal factors (and their inteffeladonsfirp) that influence the decisions leadingto the designs for specific structures " (McGuire & Schiffer, 1938)The following is an enumeration of the attitudes or 'casual factors' that create the basis for the decisions taken along the design process. The basic foundation is the urbanity, the framework or system where the project takes place. This element comprises the urban context and the history of the place which eventually become the rules -the limits- set by the environment. The idea of dwelling also comes into play suggesting the need of permanency and the understanding of the concept of living and inhabiting a space. Next, the feminine component acts as a basis for reflections on femininity, where protection, subtlety and sensuality play important roles. This feminine attitude is carried not only thematically but also architecturally. Also, the culture is important in regards to tradition and contemporaneousness. The fact that the site is situated in Buenos Aires -Argentina- implies an understanding of its people and the values of its culture. Finally, the architectural component establishes personal beliefs toward architecture and the role of the architect in society along with the personal ability to realize the design. All these attitudes fuse together to become the final project: a house for a woman in Buenos Aires.In this way, the challenge is to work with and within the different limits and find the inherent freedom. "Architects are able to creatively play with these limitations and still achieve great responses to both their own intentions and today's society's needs" (previous research). This search carries various decisions regarding a balanced 'giving and taking', and a great deal of creativity. Certainly, it is in the creative 'way-finding' that architecture can express itself most gracefully and truthful. In conclusion, in this project there are limits regarding the contextual issues, rules and norms (urbanity), society's needs and beliefs (women issues), cultural constraints (tradition) and the architect's social responsibilities. In spite of these limitations and thanks to them, the intention is to 'seek for a solution' manipulating and creatively handling these limitations to achieve an architectural artifact. / Department of Architecture

Texte remanié de: Thèse de doctorat--Paris--EHESS, 1996.

"Argentina: El espacio urbano y la narrativa fi­lmica de los ultimos anos" fills a void in the extant body of criticism on New Argentine Cinema of the 1980s and 1990s. While much as been done on the thematics and aesthetics of this body of work little has been produced in the way of studying the relationship between film form and urban process in the way Laura Podalsky does in her ground breaking study of a previous period in Specular City: Transforming Culture, Consumption and Space in Buenos Aires. More than just beginning where Podalsky ends, this work aims to provide with a more thorough on-going analysis of how the urban process in Buenos Aires influences the cartographic imaginary of a number of important film makers. Additionally, it draws together the work of important spatial theorists such as Jameson, Davis, Smith and especially Harvey. Moreover, it incorporates the concepts of film theorist David Bordwell to demonstrate how urban issues permeate the thematics and structure of the films that are analyzed.While addressing the previous points, this work also helps to modify the perspective in which the current canon of critical review portrays the cinematographic movement referred to as the New Argentine Cinema. Until now there were two main ideas about the new movement that were shared by the majority of critics. The first one makes reference to the lack of common elements among directors and films associated with the current. The second notion is that the directors of the New Argentina Cinema movement, in contrast to those from 1960's, do not align themselves politically to either side and that apathy is reflected in their films.Throughout the chapters of this work it is successfully proven that the directors of the New Argentine Cinema are amalgamated with a common theme, which is the representation of the relationship between urban spaces, either physical or intangible, throughout the majority of their films. In addition, the second conceptual hypothesis is also proven correct by demonstrating that directors in fact align themselves politically and that their views are reflected in their films.