Investigations on a sediment core from the Indian Ocean

The Multi-Sensor Core Logger (MSCL) enables non-destructive, quasi-continuous measuroments of physical properties, reducing the time needed for discrete sample analysis. Density, compressional wave velocity (Vp), and magnetic susceptibility are measured on water-saturated sediment cores. Rapid variations in the lithology can thus be more easily recognized. The advantages of MSCL measurements over traditional sedimentological investigation methods are illustrated using several examples. Density-Vp relationships provide detailed lithological information prior to splitting the sediment cores. In terrigenous sediments, density increases with Vp, whereas in biogenic sediments it decreases. In biogenic sediments in the South Atlantic, low densities and high Vp are associated with high opal content. In biogenic sediments in the Peru Basin, density increases with carbonate content. Carbonate, which is very important for deep-sea environmental protection and for paleoclimatic studies, can be determined quantitatively from MSCL measurements in this area. In terrigenous sediments in the Bengal Fan, the acoustic impedance (the product of density and Vp) increases with grain size. There, the grain-size distribution can be rapidly derived from the acoustic impedance. Moreover, in hemipelagic sediments in the Bengal Fan, it is possible to correlate variations in magnetic susceptibility with cyclic changes in the earth's orbital parameters - an important prerequisite for detailed stratigraphic studies.

Meiobenthos investigations in the Black Sea during Poseidon cruise POS317/3

Meiobenthos densities and higher taxon composition were studied in an active gas seepage area at depths from 182 to 252 m in the submarine Dnieper Canyon located in the northwestern part of the Black Sea. The meiobenthos was represented by Ciliata, Foraminifera, Nematoda, Polychaeta, Bivalvia, Gastropoda, Amphipoda, and Acarina. Also present in the sediment samples were juvenile stages of Copepoda and Cladocera which may be of planktonic origin. Nematoda and Foraminifera were the dominant groups. The abundance of the meiobenthos varied between 2397 and 52593 Ind./m**2. Maximum densities of Nematoda and Foraminifera were recorded in the upper sediment layer of a permanent H2S zone at depths from 220 to 250 m. This dense concentration of meiobenthos was found in an area where intense methane seeps were covered by methane-oxidizing microbial mats. Results suggest that methane and its microbial oxidation products are the factors responsible for the presence of a highly sulfidic and biologically productive zone characterized by specially adapted benthic groups. At the same time, an inverse correlation was found between meiofauna densities and methane concentrations in the uppermost sediment layers. The hypothesis is that the concentration of Nematoda and Foraminifera within the areas enriched with methane is an ecological compromise between the food requirements of these organisms and their adaptations to the toxic H2S.

Investigations on volcanic rocks in sediment core CRP-3 from the Ross Sea, Antarctica

The petrography, mineralogy and geochemistry of volcanic and subvolcanic rocks in CRP-3 core have been examined in detail in order to characterise and to compare them with volcanic and subvolcanic rocks cropping out in the Victoria Land area, and to define the clast provenance or to establish possible volcanic activity coeval with deposition. Clasts with sizes ranging from granule to boulder show geochemical and mineralogical features comparable with those of Ferrar Supergroup rocks. They display a subalkaline affinity and compositions ranging from basalts to dacite. Three different petrographic groups with distinct textural and grain size features (subophitic, intergranular-intersertal, and glassy-hyalopilitic) are recognised and are related to the emplacement/cooling mechanism. In the sand to silt fraction, the few glass shards that have been recognised are strongly altered: however chemical analyses show they have subalkalic magmatic affinity. Mineral compositions of the abundant free clinopyroxene grains found in the core, are less affected by alteration processes, and indicate an origin from subalkaline magmas. This excludes the presence, during the deposition of CRP-3 rocks of alkaline volcanic activity comparable with the McMurdo Volcanic Group. Strong alteration of the magmatic body intruded the Beacon sandstones obliterates the original mineral assemblage. Geochemical investigations confirm that intrusion is part of the Ferar Large Igneous Province.

Investigations on sediments from Lake Nam Co (Tibetan Plateau)

This study focuses on the analysis of lake sediments retrieved from the deepest part of Lake Nam Co (Tibetan Plateau). One gravity core of 115 cm length, covering the last ~ 4000 cal BP, was analyzed for geochemical and biological parameters. High organic content at ~ 4000 cal BP and the coinciding presence of pyrite framboids until ~ 2000 cal BP point to hampered decomposition of organic material due to anoxic conditions within the lake sediments. At the same time sedimentological and biological proxies suggest a rather high lake level, but still ~ 5 m below the recent one, with less saline lake water due to enhanced monsoonal activity. During this time a change in the source of organic matter to lowered input of terrestrial components is observed. A rather quick shift to a dry environment with less monsoonal influence and a lake level ~ 15 m lower than today at ~ 2000 cal BP lead to the oxygenation of sediment, the degradation of organic matter and the absence of pyrite. Oscillations of the lake level thereafter were of minor amplitude and not able to establish anoxia at the lake bottom again. A wet spell between ~ 1500 cal BP and ~ 1150 cal BP is visible in proxies referring to catchment hydrology and the ostracod-based water depth transfer function gives only a slightly elevated lake level. The last ~ 300 years are characterized by low TOC and rising TN values reflecting enhanced nutrient supply and hence an advancing influence of human activity in the catchment. Decreasing TOC/TN values point to a complete shift to almost solely aquatic biomass production. These results show that hydrological variations in terms of lake level change based on monsoonal strength can be linked to redox conditions at the lake bottom of Nam Co. Comparison with other archives over larger parts of the Tibetan Plateau and beyond exhibits a rather homogeneous climatic pattern throughout the late Holocene.

Seismic investigations of the Greenland ice sheet at EGIG points

The compressional and the shear wave velocities in the Greenland ice sheet are derived from seismic records of the EGIG 1959. Further the variation of velocities in the firn and the dependance of Poisson's ratio from depth are determined. At Station Centrale, two P-waves are recorded from underground layers. Their velocities show that the ice basement consists of crystalline rocks. The P-wave velocities derived from reflections agree well with those obtained by refraction shooting. From this agreement results that the ice is ± homogenous and ± isotropic for Pwaves. The elastic constants for isotropic ice are calculated. Finally the temperature dependence of the velocities is discussed.

La política criminal del legislador [Argentina, 2000-2009]

Investigación sobre la actividad legislativa que se encuentra en el trasfondo de las reformas al Código Penal argentino. El período analizado comprende los años 2000-2009. A través de proyectos de ley y dictámenes de comisiones de las cámaras del Congreso de la Nación se analiza el proceso de creación de las leyes, y las representaciones de violencia e inseguridad que tienen los legisladores. Así, pueden desentrañarse diversas categorías de violencia, derechos, bienes tutelados y el rol de la política criminal en un Estado de derecho

La inserción social del indígena en las urbes y campañas del territorio bonaerense y su relación con la justicia criminal hispanocriolla durante el período independiente temprano (1810-1835)

La sociedad bonaerense del período independiente temprano, no sólo se caracterizó por estar fuertementejerarquizada desde el punto de vista socioeconómico, sinoademás por ser legalmente desigual y altamente punitiva. Los hechos asentados en los expedientes judiciales correspondientes a causas criminales y correccionales presentadas ante el Juzgado del Crimen, muestran claramente -entre otros aspectos- las características de la justicia criminal hispanocriolla: cómo operaba y se administraba la ley vigente, frente a la cual, los sectores bajos de la pirámide social y en particular, los individuos de casta (indios, negros, morenos, etc.), resultaban ser los más desprotegidos y vulnerables. Por lo tanto, en el presente proyecto, nos interesa abordar la inserción social del indígena en las urbes y campañas, y su integración en el mercado laboral de la época, y a partir de este marco y desde esa sociedad que lo incluía, se pretende indagar alindígena frente al delito y dentro de la dinámica del campo judicial, articulando las dimensiones social, económica y jurídica. De esta manera, combinando las fuentes judiciales de 1810 a 1835 con otros documentos del período, se intenta dar cuenta no sólo de los aspectos sociales y económicos de la vida personal y cotidiana del indígena sino además de las particularidades del proceso de juzgamiento y penalización de sus acciones durante el incipiente período independentista.

La literatura criminal : Viajes de ida y de vuelta

Los géneros literarios se constituyen a través de prácticas hipertextuales. El caso del género criminal tanto en España como en Hispanoamérica no es menos. Aunque nace con conciencia de género gracias a las primeras creaciones de Edgar Allan Poe, llega a la lengua hispana para establecerse y transculturalizarse sobre la base de las propias tradiciones autóctonas. A partir de las relaciones entre los escritores de ambos continentes, el género va a desarrollarse en las dos últimas décadas con un hibridismo y dinamismo que, sin ese movimiento, no sería posible. En esta ponencia se analizarán así las incursiones de novelas criminales que traspasan el océano en viajes de ida y de vuelta. Así, estudiaré los viajes del detective hispano Pepe Carvalho a Buenos Aires y México, pero también las investigaciones ficticias -metalépticas y póstumas- de Vázquez Montalbán en Muertos incómodos del Subcomandante Marcos y de Taibo II. Para, en segundo lugar, analizar de qué forma la literatura criminal hispanoamericana llega a España, centrándome en las novelas y otros textos narrativos de Raúl Argemí, que tratan temas de acá, para dejar sus huellas argentinas allá, desde la perspectiva de este congreso, detrás del charco.

Monstruos perfectos : La educación criminal de Miroslavo Hordt : Molfino, Miguel Angel (2010): Monstruos perfectos. Córdoba, Ediciones Recovecos, Editorial Cuna, pp. 282

Fil: Dubin, Mariano. Universidad Nacional de La Plata. Facultad de Humanidades y Ciencias de la Educación; Argentina.

Universidad y producción de conocimiento orientado a la política criminal : Un estudio de caso

Se presentan resultados parciales de una investigación en curso que analiza la producción de conocimiento criminológico en el ámbito universitario público argentino desde la perspectiva del campo CTS. El foco principal de interés es la caracterización de las formas de vinculación entre actores científicos y no científicos durante las prácticas de producción de conocimiento, y la detección de fenómenos de co-producción, discutido en la literatura como uno de los factores que estimula la aplicación y uso social de resultados de la I+D. Para abordar este tema, se seleccionaron cuatro grupos de investigación localizados en una provincia argentina, e integrantes a su vez de una red multidisciplinaria de grupos universitarios financiada con fondos públicos y dedicada a estudiar el problema de la seguridad, el delito y las respuestas del Estado y las políticas públicas en el país. Estos grupos fueron analizados bajo una metodología de análisis de redes sociales, con el fin de modelizar los patrones de interacción observados entre los investigadores y otros actores sociales en diversas instancias del desarrollo de sus investigaciones. Se discuten los resultados obtenidos en el cálculo de indicadores relacionales de centralidad, centralización e intermediación derivados del análisis de redes.