Biopolítica, política social y el problema pedagógico en educación física. El caso de los torneos juveniles bonaerenses

En este trabajo se llevará adelante una consideración sobre el concepto de biopolítica como una herramienta de análisis al momento de considerar la aparente paradoja que representa, por un lado, la intervención pedagógica de la Educación Física en la institución escolar bonaerense y, por el otro, la presencia del deporte escolar en los Torneos Juveniles Bonaerenses. Se pretende mostrar aquí como la paradoja entre pedagogía y deporte competitivo, mediatizada por una intencionalidad universalista de política social, se disuelve en este concepto acuñado por Foucault a finales de los años '70. Este concepto como categoría de análisis presentaría así un fuerte potencial explicativo que bien podría posibilitar el desarrollo de nuevos enfoques al momento de historizar las prácticas de la disciplina.

Implementación de políticas públicas en el nivel local : El caso del proyecto Centros Integradores Comunitarios en Berisso [2004-2007]

Fil: López, Silvina Lucrecia. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Bello Reguera, Gabriel. El valor de los otros. Más allá de la violencia intercultural. Madrid, Editorial Biblioteca Nueva, Colección Razón y sociedad, 2006, 205 pp.

Fil: Ercoli, César Adrián. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Carbonate and Aluminium accumulation in the central equatorial Pacific Ocean

We examined the flux of Al to sediment accumulating beneath the zone of elevated productivity in the central equatorial Pacific Ocean, along a surface sediment transect at 135°W as well as downcore for a 650 kyr record at 1.3°N, 133.6°W. Across the surface transect, a pronounced, broadly equatorially symmetric increase in Al accumulation is observed, relative to Ti, with Al/Ti ratios reaching values 3-4 times that of potential detrital sources. The profile parallels biogenic accumulation and the modeled flux of particulate 234Th, suggesting rapid and preferential adsorptive removal of Al from seawater by settling biogenic particles. Normative calculations confirm that most Al is unsupported by the terrigenous fraction. The observed distributions are consistent with previous observations of the relative and absolute behavior of Al and Ti in seawater, and we can construct a reasonable mass balance between the amount of seawater-sourced Al retained in the sediment and the amount of seawater Al available in the overlying column. The close tie between Al/Ti and biogenic accumulation (as opposed to concentration) emphasizes that biogenic sedimentary Al/Ti responds to removal-transport phenomena and not bulk sediment composition. Thus, in these sediments dominated by the biogenic component, the bulk Al/Ti ratio reflects biogenic particle flux, and by extension, productivity of the overlying seawater. The downcore profile of Al/Ti at 1.3°N displays marked increases during glacial episodes, similar to that observed across the surface transect, from a background value near Al/Ti of average upper crust. The excursions in Al/Ti are stratigraphically coincident with maxima in both bulk and CaCO3 accumulation and the excess Al appears to not be preferentially affiliated with opaline or organic phases. Consistent with the similar behavioral removal of Al and 234Th, the latter of which responds to the total particle flux, the Al flux reflects carbonate accumulation only because carbonate comprises the dominant flux in these particular deposits. These results collectively indicate that (1) Al in biogenic sediment and settling biogenic particles is strongly affected by a component adsorbed from seawater. Therefore, the common tenet that Al is dominantly associated with terrestrial particulate matter, and the subsequent use of Al distributions to calculate the abundance and flux of terrestrial material in settling particles and sediment, needs to be reevaluated. (2) The Al/Ti ratio in biogenic sediment can be used to trace the productivity of the overlying water, providing a powerful new paleochemical tool to investigate oceanic response to climatic variation. (3) The close correlation between the Al/Ti productivity signal and carbonate maxima downcore at 1.3°N suggests that the sedimentary carbonate maxima in the central equatorial Pacific Ocean record increased productivity during glacial episodes.

Implementación de políticas públicas en el nivel local : El caso del proyecto Centros Integradores Comunitarios en Berisso [2004-2007]

Fil: López, Silvina Lucrecia. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Bello Reguera, Gabriel. El valor de los otros. Más allá de la violencia intercultural. Madrid, Editorial Biblioteca Nueva, Colección Razón y sociedad, 2006, 205 pp.

Fil: Ercoli, César Adrián. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Petrology and geochemistry of basalts from the Vavilov Basin

During ODP Leg 107, two holes were drilled in the basement of Vavilov Basin, a central oceanic area of the Tyrrhenian sea. Hole 655B is located near the Gortani ridge in off-axis position at the western rim of the basin; Hole 651A is located on a basement swell at the axis of the basin. This paper deals with mineral chemistry, major and trace element geochemistry, and petrogenesis of the basalts recovered in the two holes. The mineralogy of the basalts is broadly homogeneous, but all of them have suffered important seawater alteration. Their major-element compositions are similar to both normal-mid-ocean-ridge-basalts (N-MORB) and back-arc-basalts (BAB) except for Na2O contents (BAB-like), and K2O which is somewhat enriched in upper unit of Hole 651 A. Their affinity with N-MORB and BAB is confirmed by using immobile trace elements such as Zr, Y, and Nb. However, basalts from the two sites present contrasting geochemical characteristics on spidergrams using incompatible elements. Hole 655B basalts are homogeneous enriched tholeiites, similar to those from DSDP Hole 373 (located on the opposite side of the basin near the eastern rim), and show affinities with enriched MORB (E-MORB). At Hole 651 A, the two basalt units are chemically distinct. One sample recovered in lower unit is rather similar to those from Hole 655B, but basalts from upper unit display calc-alkaline characteristic evidenced by the increase of light-ion-lithophile-element (LILE)/high-field-strength-element (HFSE) ratio, and appearance of a negative Nb-anomaly, making them comparable with orogenic lavas from the adjacent Eolian arc. The observed chemical compositions of the basalts are consistent with a derivation of the magmas from a N-MORB type source progressively contaminated by LILE-enriched fluids released from dehydration of the bordering subducted plate. Implications for evolution of the Tyrrhenian basin are tentatively proposed taking into consideration geochemical and chronological relationships between basalts from Leg 107 Holes 655B and 651 A, together with data from Leg 42 Site 373 and Vavilov Seamount. These data illustrate back-arc spreading in ensialic basin closely associated with the maturation of the adjacent subduction, followed by the growth of late off-axis central volcano, whereas the active subduction retreats southeastward.

Biopolítica, política social y el problema pedagógico en educación física. El caso de los torneos juveniles bonaerenses

En este trabajo se llevará adelante una consideración sobre el concepto de biopolítica como una herramienta de análisis al momento de considerar la aparente paradoja que representa, por un lado, la intervención pedagógica de la Educación Física en la institución escolar bonaerense y, por el otro, la presencia del deporte escolar en los Torneos Juveniles Bonaerenses. Se pretende mostrar aquí como la paradoja entre pedagogía y deporte competitivo, mediatizada por una intencionalidad universalista de política social, se disuelve en este concepto acuñado por Foucault a finales de los años '70. Este concepto como categoría de análisis presentaría así un fuerte potencial explicativo que bien podría posibilitar el desarrollo de nuevos enfoques al momento de historizar las prácticas de la disciplina.

Implementación de políticas públicas en el nivel local : El caso del proyecto Centros Integradores Comunitarios en Berisso [2004-2007]

Fil: López, Silvina Lucrecia. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.