773 resultados para 853
Resumo:
El Proyecto se plantea como un diálogo productivo entre los estudios literarios y la teoría archivística. Se busca conocer el grado de utilización de los archivos en los estudios literarios que se llevan adelante en la Facultad, al tiempo que se pretende conocer qué entiende el investigador literario por archivo de autor, en busca de una articulación entre la definición brindada por la teoría archivística y aquella conceptualización propia asignada por los investigadores literarios.
Resumo:
Este trabajo forma parte de una investigación más amplia, a ser desarrollada por el autor en futuros estudios de posgrado, sobre las transformaciones experimentadas por lo que podríamos llamar la 'composición', 'morfología' o 'estructura' de la clase obrera en Argentina, a partir del profundo proceso de reestructuración capitalista que viene afectando a las relaciones de clase desde los inicios de la última dictadura militar, en marzo de 1976. En primer lugar, procuraremos analizar los enfoques y argumentos más influyentes que, tanto en el debate internacional como en el nacional, se han apoyado en la terciarización como suerte de 'base objetiva' para explicar [o postular] la pérdida de centralidad de la clase obrera. Luego nos enfocaremos en las variaciones que ha presentado la composición sectorial del empleo asalariado en el Gran Buenos Aires [GBA], a lo largo del período en estudio [1974-2010]. Lo haremos utilizando las bases usuarias de la Encuesta Permanente de Hogares [EPH]. Finalmente, analizaremos los posibles solapamientos estadísticos entre la modificación en la composición sectorial del empleo del GBA y otros dos fenómenos: la tercerización de actividades [outsourcing], y las políticas de promoción industrial regionales implementadas en el país
Resumo:
A new technique for the harmonic analysis of current observations is described. It consists in applying a linear band pass filter which separates the various species and removes the contribution of non-tidal effects at intertidal frequencies. The tidal constituents are then evaluated through the method of least squares. In spite of the narrowness of the filter, only three days of data are lost through the filtering procedure and the only requirement on the data is that the time interval between samples be an integer fraction of one day. This technique is illustrated through the analysis of a few French current observations from the English Channel within the framework of INOUT. The characteristics of the main tidal constituents are given.
Resumo:
The 853 m thick sediment sequence recovered at ODP Site 1148 provides an unprecedented record of tectonic and paleoceanographic evolution in the South China Sea over the past 33 Ma. Litho-, bio-, and chemo-stratigraphic studies helped identify six periods of changes marking the major steps of the South China Sea geohistory. Rapid deposition with sedimentation rates of 60 m/Ma or more characterized the early Oligocene rifting. Several unconformities from the slumped unit between 457 and 495 mcd together erased about 3 Ma late Oligocene record, providing solid evidence of tectonic transition from rifting/slow spreading to rapid spreading in the South China Sea. Slow sedimentation of ~20-30 m/Ma signifies stable seafloor spreading in the early Miocene. Dissolution may have affected the completeness of Miocene-Pleistocene succession with short-term hiatuses beyond current biostratigraphical resolution. Five major dissolution events, D-1 to D-5, characterize the stepwise development of deep water masses in close association to post-Oligocene South China Sea basin transformation. The concurrence of local and global dissolution events in the Miocene and Pliocene suggests climatic forcing as the main mechanism causing deep water circulation changes concomitantly in world oceans and in marginal seas. A return of high sedimentation rate of 60 m/Ma to the late Pliocene and Pleistocene South China Sea was caused by intensified down-slope transport due to frequent sea level fluctuations and exposure of a large shelf area during sea level low-stands. The six paleoceanographic stages, respectively corresponding to rifting (~33-28.5 Ma), changing spreading southward (28.5-23 Ma), stable spreading to end of spreading (23-15 Ma), post-spreading balance (15-9 Ma), further modification and monsoon influence (9-5 Ma), and glacial prevalence (5-0 Ma), had transformed the South China Sea from a series of deep grabens to a rapidly expanding open gulf and finally to a semi-enclosed marginal sea in the past 33 Ma.
Resumo:
The development of an orbitally tuned time scale for the ODP leg 138 sites provides biostratigraphers a very high resolution chronostratigraphic framework. With this framework we are better able to define which of the first and last appearances of species appear to be synchronous. In addition, the geographic distribution of sites provides the means with which the detailed spatial patterns of invasion of new species and the extinction of older species can be mapped. These maps not only provide information on the process of evolution, migration, and extinction, they can also be related to water mass distributions and near-surface circulation of the ocean. Of 39 radiolarian events studied at 11 sites in the eastern equatorial Pacific, 28 were found to have a minimum range in their estimated age that exceeded 0.15 m.y. The temporal pattern of first and last appearances of these diachronous events have coherent spatial patterns that indicate shifts in the areas of high oceanographic gradients over the past 10 Ma. These changes in the locations of high gradient regions suggest that the South Equatorial Current (SEC) was north of its present position prior to approximately 7 Ma. There was a southward shift in the northern boundary of this current between approximately 6 and 7 Ma, and the development of a relatively strong gradient between the northeastern and northwestern sites. Between approximately 3.7 and 3.4 Ma, there was a very slight northward shift in the northern boundary of the SEC and the steep gradients between the northeastern and northwestern sites may have disappeared. This change is thought to be associated with the closing of the Isthmus of Panama. The temporal-spatial patterns of diachronous events younger than 3.4 Ma are consistent with patterns of circulation in the modern ocean.