Forward inclusive dijet production and azimuthal correlations in pA collisions

We derive forward inclusive dijet production in the scattering of a dilute hadron off an arbitrary dense target, whose partons with small fraction of momentum x are described by a Color Glass Condensate. Both multiple scattering and non-linear QCD evolution at small-x are included. This is of relevance for measurements of two-particle correlations in the proton direction of proton-nucleus collisions at RHIC and LHC energies. The azimuthal angle distribution is peaked back to back and broadens as the momenta of the measured particles gets closer to the saturation scale.Comment: 14 pages, 4 figures, references added, version to appear in NP

Lens and Retina Formation Require Expression of Pitx3 in Xenopus Pre-lens Ectoderm

Pitx3 is expressed in tissues fated to contribute to eye development, namely, neurula stage ectoderm and prechordal mesoderm, then presumptive lens ectoderm, placode, and finally lens. Pitx3 overexpression alters lens, optic cup, optic nerve, and diencephalon development. Many of the induced anomalies are attributable to midline deficits; however, as assessed by molecular markers, ectopic Pitx3 appears to temporarily enlarge the lens field. These changes are usually insufficient to generate either ectopic lenses to enlarge the eye that eventually differentiates. Conversely, use of a repressor chimera or of antisense morpholinos alters early expression of marker genes, and later inhibits lens development, thereby abrogating retinal induction. Reciprocal grafting experiments using wild-type and morpholino-treated tissues demonstrate that Pitx3 expression in the presumptive lens ectoderm is required for lens formation. Contradictory to recent assertions that retina can form in the absence of a lens, the expression of Pitx3 in the presumptive lens ectoderm. is critical for retina development

Antropología y envejecimiento: aproximaciones teóricas y ejemplos etnográficos

La ponencia se propone realizar algunas consideraciones sobre la aproximación antropológica al estudio de los procesos de envejecimiento. La misma comprenderá el estudio de un conjunto de textos seleccionados y analizados en los últimos años en el marco de los contenidos del curso de Etnografía II, asignatura obligatoria para todos los estudiantes que cursan la Carrera de Antropología de la Facultad de Ciencias Naturales y Museo (UNLP). Partiendo de la consideración de que las cuestiones vinculadas al género y la edad se instalan como preocupación disciplinar en la segunda parte del siglo XX, nos proponemos rescatar los principales aportes que las fuentes etnográficas nos ofrecen, especialmente sobre los procesos de envejecimiento y la variabilidad de experiencias del envejecer. Rescataremos el valor del criterio etario como un principio de organización presente en distintas sociedades, sobre la base del cual las mismas establecen un parámetro para ubicar a los individuos más o menos contemporáneos en el marco de sus relaciones con el resto de conjunto social. En tal sentido, destacaremos el valor central del concepto de edad social para entender diversas estrategias culturales asignadas al colectivo “viejos”. Finalmente, señalaremos el modo en que el estudio de los procesos de envejecimiento en las sociedades etnográficas puede contribuir a la reflexión acerca del fenómeno en las sociedades modernas. Basados en la variabilidad intra e intercultural que nos ofrece la aproximación antropológica, reflexionaremos sobre los aportes que el trabajo disciplinar e interdisciplinar puede proporcionar para una mejor comprensión del problema del envejecimiento y las políticas adecuadas para el tránsito por esta última etapa del trayecto vital.Facultad de Trabajo Socia

Bryan Kies

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Exited Prostitution Survivor Policy Platform

Survivors of prostitution propose a policy reform platform including three main pillars of priority: criminal justice reforms, fair employment, and standards of care. The sexual exploitation of prostituted individuals has lasting effects which can carry over into many aspects of life. In order to remedy these effects and give survivors the opportunity to live a full and free life, we must use a survivor-centered approach to each of these pillars to create change. First, reform is necessary in the criminal justice system to recognize survivors as victims of crime and not perpetrators, while holding those who exploited them fully responsible. Second, reform is necessary to assist survivors in finding fair employment by offering vocational training, financial counseling, and educational scholarships, as well as offering employment opportunities that utilize survivors’ vast array of skills and interests. Finally, standards of care for survivors exiting prostitution should focus on supporting survivors in our journeys and support short- and long-term resources that empower us. These systemic changes are necessary to recognize survivors as the valuable human beings we are and to support survivors in fulfilling our vast potential

On multiple scatterings of mesons in hot and cold QCD matter

We study the propagation of a color singlet q\bar{q} pair undergoing multiple scatterings in hot and cold QCD matter. The interaction of the dipole with the nucleus or plasma is described with the McLerran-Venugopalan and Gyulassy-Wang models respectively. We find identical results when expressed in terms of the saturation momentum of either the nucleus or the plasma. We compare two kinds of multiple scatterings, elastic and inelastic with respect to the target. When allowing the target to scatter inelastically, the difference with the elastic case is suppressed by a 1/N^2_c factor. We also discuss some implications of our results in the following situations: the survival probability of quarkonia in a hot medium, the production of high-p_T heavy mesons in nucleus-nucleus collisions, and the production of vector mesons in deep inelastic scattering off nuclei.Comment: 27 pages, 7 figures, discussions improved, references added, to be published in NP