Influência do transporte fluvial em carcaças de bovinos no Pantanal.

O transporte é considerado o evento mais estressante que os bovinos sofrem durante as suas vidas. Cada ano a indústria de carne bovina perde milhões de dólares devido as lesões as quais reduzem o valor da carcaça (Grandin, 1997). A qualidade da carne é influenciada por fatores intrínsecos e extrínsecos. Entre os últimos, destacam-se as práticas de manejo no local de criação, no transporte e no abatedouro. Atualmente, muita ênfase tem sido dada para as conseqüências econômicas do manuseio e transporte deficiente dos animais (Roça & Serrano, 1996). O Pantanal é uma imensa planície sedimentar, com cerca de 140.000 km², situando-se mais ou menos entre os paralelos 16° e 21°S e os meridianos de 55°W. A pecuária é desenvolvida em criatórios naturais extensivos com características de manejo pautadas pelo regime de enchentes. Neste sistema, os animais recebem poucos cuidados e são mantidos quase que exclusivamente de pastagens nativas das extensas planícies arenosas e com poucas subdivisões, de forma a permitir o pastejo seletivo e o uso das aguadas. A navegação fluvial é importe no Pantanal, porque as cheias da Bacia do Paraguai dificultam o escoamento da produção por via terrestre. O transporte fluvial de bovino é realizado por lanchas-curral privadas, pouco adaptadas para este tipo de atividade. Portanto, este trabalho teve o objetivo analisar a influência do transporte fluvial na ocorrência de lesões na carcaça de bovinos que são abativos nos frigoríficos da região.bitstream/item/79537/1/COT43.pd

Transporte rodoviário de bovinos de corte no Pantanal Sul-mato-grossense: ocorrência de lesões em carcaças.

Uma das etapas mais importantes no aproveitamento da carne no sistema de produção de gado de corte é o transporte até o abatedouro, sendo o transporte rodoviário o meio mais comum de condução de animais de corte para o abate (Tarrant et al., 1988). No Brasil, este transporte é realizado em "caminhões boiadeiros", tipo "truque" com a capacidade de carga média, de 20 animais (Joaquim, 2002). O transporte rodoviário realizado em condições desfavoráveis como aumento da temperatura, jejum, desidratação, cansaço pode provocar a morte dos animais ou conduzir a contusões, perda de peso e estresse dos animais (Knowles, 1999). No Pantanal Sul-Mato-Grossense a maioria dos bovinos é transportada por caminhões até os frigoríficos ou abatedouros. Este trabalho teve por objetivo analisar a influência do transporte rodoviário na ocorrência de lesões na carcaça de bovinos abatidos no Pantanal.bitstream/item/79512/1/COT36.pd

Las cárceles de la democracia

A partir de la identificación de tres momentos relevantes, el artículo presenta un conjunto de experiencias disímiles y respuestas estatales diversas en materia penitenciaria desde la recuperación de la democracia en la Argentina. El primero está marcado por la búsqueda de una política pública progresista y una práctica penitenciaria democrática (1983-1989); el segundo, por el diseño e implementación del “Plan Director de la Política Penitencia­ria Argentina”, orientado a la recuperación del modelo correccionalista y su consolidación institucional (1990-1999); y el tercero se sustentó en un brusco cambio de rumbo plasmado en el Plan de Sentencia, siguiendo los modelos del “riesgo”, el desistimiento del delito y las criminologías anglosajonas de “What Works” (2014-2020).Based on the identification of three relevant moments the article presents a set of dissi­milar experiences and a diversity of state responses in prison matters since the recovery of democracy in Argentina. The first is marked by the search for a politically progressive public policy and a democratic penitentiary practice (1983–1989); the second, by the design and implementation of the “Plan Director de la Política Penitenciaria Argentina” (Master plan for Argentine prison policy), aimed at the recovery of the correctionalist model and its institutional consolidation (1990–1999); and the third was sustained by an abrupt change of course embodied in the Sentencing Plan, following the models of “risk”, the desistance from crime and the anglo-saxon criminology theory of “What Works” (2014–2020).A partir de la identificación de tres momentos relevantes, el artículo presenta un conjunto de experiencias disímiles y respuestas estatales diversas en materia penitenciaria desde la recuperación de la democracia en la Argentina. El primero está marcado por la búsqueda de una política pública progresista y una práctica penitenciaria democrática (1983-1989); el segundo, por el diseño e implementación del “Plan Director de la Política Penitencia­ria Argentina”, orientado a la recuperación del modelo correccionalista y su consolidación institucional (1990-1999); y el tercero se sustentó en un brusco cambio de rumbo plasmado en el Plan de Sentencia, siguiendo los modelos del “riesgo”, el desistimiento del delito y las criminologías anglosajonas de “What Works” (2014-2020)

Las cárceles de la democracia

A partir de la identificación de tres momentos relevantes, el artículo presenta un conjunto de experiencias disímiles y respuestas estatales diversas en materia penitenciaria desde la recuperación de la democracia en la Argentina. El primero está marcado por la búsqueda de una política pública progresista y una práctica penitenciaria democrática (1983-1989); el segundo, por el diseño e implementación del “Plan Director de la Política Penitencia­ria Argentina”, orientado a la recuperación del modelo correccionalista y su consolidación institucional (1990-1999); y el tercero se sustentó en un brusco cambio de rumbo plasmado en el Plan de Sentencia, siguiendo los modelos del “riesgo”, el desistimiento del delito y las criminologías anglosajonas de “What Works” (2014-2020).Based on the identification of three relevant moments the article presents a set of dissi­milar experiences and a diversity of state responses in prison matters since the recovery of democracy in Argentina. The first is marked by the search for a politically progressive public policy and a democratic penitentiary practice (1983–1989); the second, by the design and implementation of the “Plan Director de la Política Penitenciaria Argentina” (Master plan for Argentine prison policy), aimed at the recovery of the correctionalist model and its institutional consolidation (1990–1999); and the third was sustained by an abrupt change of course embodied in the Sentencing Plan, following the models of “risk”, the desistance from crime and the anglo-saxon criminology theory of “What Works” (2014–2020).A partir de la identificación de tres momentos relevantes, el artículo presenta un conjunto de experiencias disímiles y respuestas estatales diversas en materia penitenciaria desde la recuperación de la democracia en la Argentina. El primero está marcado por la búsqueda de una política pública progresista y una práctica penitenciaria democrática (1983-1989); el segundo, por el diseño e implementación del “Plan Director de la Política Penitencia­ria Argentina”, orientado a la recuperación del modelo correccionalista y su consolidación institucional (1990-1999); y el tercero se sustentó en un brusco cambio de rumbo plasmado en el Plan de Sentencia, siguiendo los modelos del “riesgo”, el desistimiento del delito y las criminologías anglosajonas de “What Works” (2014-2020)

Influence of grape juice extraction methods on basic analytical parameters

Currently, for monitoring the ripening of grape berries, different devices are used to produce the juices to be analysed. Crushing the berries is a key step that determines the quantity of juice extracted and may impact it composition. The effect of different devices on analytical parameters of the musts produced were compared in this study. Samples from four grape varieties ('Cabernet-Sauvignon', 'Ekigaïna', 'Marselan' and 'Vermentino'), showing a variability of berry size and precocity, were crushed using six different devices (ASieves, Bag mixer®, Crusher, Manual, TPress and Blender). Whatever the pressing equipment, sugar concentrations of the must were not modified by the extraction method, unlike other parameters. pH and titratable acidity were slightly impacted by the crushing method without changing the ranking of the varieties. However, potassium concentrations were more impacted by the pressing method. Differences in mechanical forces applied to skins and seeds according to the pressing equipment used may release more or less potassium. This study clearly discarded a complete grinding of the samples for grape ripening monitoring: this method strongly modified the potassium content and, consequently, the pH and the titratable acidity of the musts

The K2-ESPRINT Project. I. Discovery of the Disintegrating Rocky Planet K2-22b with a Cometary Head and Leading Tail

We present the discovery of a transiting exoplanet candidate in the K2 Field-1 with an orbital period of 9.1457 hr: K2-22b. The highly variable transit depths, ranging from $\sim$0\% to 1.3\%, are suggestive of a planet that is disintegrating via the emission of dusty effluents. We characterize the host star as an M-dwarf with $T_{\rm eff} \simeq 3800$ K. We have obtained ground-based transit measurements with several 1-m class telescopes and with the GTC. These observations (1) improve the transit ephemeris; (2) confirm the variable nature of the transit depths; (3) indicate variations in the transit shapes; and (4) demonstrate clearly that at least on one occasion the transit depths were significantly wavelength dependent. The latter three effects tend to indicate extinction of starlight by dust rather than by any combination of solid bodies. The K2 observations yield a folded light curve with lower time resolution but with substantially better statistical precision compared with the ground-based observations. We detect a significant "bump" just after the transit egress, and a less significant bump just prior to transit ingress. We interpret these bumps in the context of a planet that is not only likely streaming a dust tail behind it, but also has a more prominent leading dust trail that precedes it. This effect is modeled in terms of dust grains that can escape to beyond the planet's Hill sphere and effectively undergo `Roche lobe overflow,' even though the planet's surface is likely underfilling its Roche lobe by a factor of 2.Comment: 22 pages, 16 figures. Final version accepted to Ap

Pinning and switching of magnetic moments in bilayer graphene

We examine the magnetic properties of the localized states induced by lattice vacancies in bilayer graphene with an unrestricted Hartree-Fock calculation. We show that with realistic values of the parameters and for experimentally accessible gate voltages we can have a magnetic switching between an unpolarized and a fully polarized system.Comment: 9 pages, 4 figure

Size of the Vela Pulsar's Radio Emission Region: 500 km

We use interstellar scattering of the Vela pulsar to determine the size of its emission region. From interferometric phase variations on short baselines, we find that radio-wave scattering broadens the source by 3.4+/-0.3 milliarcseconds along the major axis at position angle 81+/-3 degrees. The ratio of minor axis to major axis is 0.51+/-0.03. Comparison of angular and temporal broadening indicates that the scattering material lies in the Vela-X supernova remnant surrounding the pulsar. From the modulation of the pulsar's scintillation on very short baselines, we infer a size of 500 km for the pulsar's emission region. We suggest that radio-wave refraction within the pulsar's magnetosphere may plausibly explain this size.Comment: 14 pages, includes 2 figures. Also available at: http://charm.physics.ucsb.edu:80/people/cgwinn/cgwinn_group/cgwinn_group.htm

Interaction energy functional for lattice density functional theory: Applications to one-, two- and three-dimensional Hubbard models

The Hubbard model is investigated in the framework of lattice density functional theory (LDFT). The single-particle density matrix $\gamma_{ij}$ with respect the lattice sites is considered as the basic variable of the many-body problem. A new approximation to the interaction-energy functional $W[\gamma]$ is proposed which is based on its scaling properties and which recovers exactly the limit of strong electron correlations at half-band filling. In this way, a more accurate description of $W$ is obtained throughout the domain of representability of $\gamma_{ij}$, including the crossover from weak to strong correlations. As examples of applications results are given for the ground-state energy, charge-excitation gap, and charge susceptibility of the Hubbard model in one-, two-, and three-dimensional lattices. The performance of the method is demonstrated by comparison with available exact solutions, with numerical calculations, and with LDFT using a simpler dimer ansatz for $W$. Goals and limitations of the different approximations are discussed.Comment: 25 pages and 8 figures, submitted to Phys. Rev.

Prevención de adicciones desde la construcción de redes sociales comunitarias. Bajo el marco de la Ley Nacional 26.061 de Protección Integral de los Derechos de las Niñas, Niños y Adolescentes.

La presente investigación se centra en la prevención de adicciones en adolescentes, tomando como muestra aproximada a 30 alumnos/as de 13 a 18 años en dos escuelas públicas secundarias: “Dr. Eduardo J. Chahla (Guaymallén) y “Profesores Mendocinos” (Luján de Cuyo) ambas ubicadas en zonas urbano marginales