The granular column collapse is a benchmark configuration for the study of granular flows in dry, saturated, and submerged conditions. The collapse sequence and resultant mobility is acknowledged to be controlled by the column aspect ratio, while grain properties define the relative transition of each stage. Grain shape effects are found to modify the global shear resistance of granular media, with a strong and coupled interaction when interacting with a fluid. In this work, we present the first steps towards the study of grain shape effects in a column collapse when interacting with an ambient fluid. For this purpose, we use a planar configuration and explore the collapse of a column consisting of rod-like grains and study the initial and after collapse grain orientations. On it, the mobilized grains deposit in a preferential horizontal orientation, but further experiments are required to confirm if a nematic configuration can be achieved.
Arsenopyrite is the most abundant arsenic-bearing sulfide mineral in the lithosphere, usually associated with sulfide gold ores. The recovery of this highly valuable metal is associated with the release of large quantities of soluble arsenic. One way to mitigate the effects of high concentrations of arsenic in solution is to immobilize it as scorodite precipitate, a more stable form. Hence, we addressed the scorodite formation capacity (under mesophilic conditions) of psychrotolerant Acidithiobacillus ferrivorans ACH isolated from the Chilean Altiplano. Bio-oxidation assays were performed with 1% arsenopyrite concentrate as unique energy source and produced solids were evaluated by X-ray diffraction (XRD) and QEMSCAN analysis. Interestingly, the results evidenced scorodite generation as the main sub-product after incubation for 15 days, due to the presence of the microorganism. Moreover, the QEMSCAN analysis support the XRD, detecting a 3.5% increase in scorodite generation by ACH strain and a 18.7% decrease in arsenopyrite matrix, implying an active oxidation. Finally, we presented the first record of arsenopyrite oxidation capacity and the stable scorodite production ability by a member of A. ferrivorans species under mesophilic conditions.
Universidad Peruana de Ciencias Aplicadas Resumen:El contexto político de la Segunda Guerra Mundial (1939Mundial ( -1945, especialmente durante la recta final, se caracterizó por la necesidad de relaciones diplomáticas entre los países involucrados. Fue así que a partir de los juicios de Núremberg, la interpretación como actividad profesional empezó a emerger con fuerza. Desde entonces, el desarrollo de esta industria ha florecido de manera diferente alrededor del mundo. En el Perú, aún no se tiene información suficiente sobre esta actividad profesional per se. Por ello, el presente artículo tiene como objetivo explorar el proceso de inserción laboral de los intérpretes con formación universitaria en el mercado peruano. Los investigadores realizaron dieciocho entrevistas en donde se exploran los testimonios del ingreso al mundo laboral de intérpretes egresados de dos universidades: la Universidad Ricardo Palma (URP) y la Universidad Femenina del Sagrado Corazón (UNIFE). El estudio demostró que una inserción laboral exitosa en el mercado de la interpretación se consigue a través de la buena gestión de las habilidades blandas, como el uso efectivo de las redes de contactos, las habilidades técnicas y de gestión empresarial.Palabras clave: inserción laboral Perú, interpretación, mercado laboral, habilidades de inserción. Exploration of the employability of interpreters in the Peruvian market Abstract:By the late 40's, the political scenario of the Second World War was mainly characterized by the high necessity to establish diplomatic relationships between the Axis and Allies powers. Within this framework, the Nuremberg trials were the scenario where simultaneous interpreting emerged. Since then, this industry has flourished differently around the world. In Peru, not many studies have been 1 Este artículo se enmarca dentro del proyecto "La realidad de los intérpretes de formación universitaria en el Perú" La Universidad Peruana de Ciencias Aplicadas del Perú respalda el presente estudio. 75Argandoña Jara, A., Martínez Morales, Z.X. y Silupu Larronda, D.C . / Exploración sobre la inserción laboral de los intérpretes en el mercado peruanoLos estudios de traducción e interpretación en América Latina
RESUMENEl síndrome de Horner está caracterizado por la siguiente tríada de signos clínicos: miosis, ptosis y anhidrosis facial. A su vez, pueden aparecer heterocromía del iris, inyección conjuntival, eritema facial, mucosa nasal congestiva y enoftalmos aparente secundario a la disminución de la hendidura palpebral. Es causado por una interrupción de la vía simpática, que se extiende desde el hipotálamo hasta la órbita. Debido a que dicha vía no se decusa, los signos son homolaterales a la lesión de esta. Tradicionalmente, se lo clasifica en congénito y adquirido. En ocasiones, se asocia a neoplasias, como el neuroblastoma. Sigue siendo controversial qué estudios de imágenes se deberían solicitar en forma protocolizada frente a un paciente con este síndrome neurológico. Se presenta el caso de un lactante de 45 días de vida con síndrome de Horner congénito. Palabras clave: síndrome de Horner, neuroblastoma. ABSTRACTHorner syndrome is characterized by the following triad of clinical signs: miosis, ptosis and facial anhidrosis. In addition, iris heterochromia, conjunctival injection, facial erythema, congestive nasal mucosa and apparent enophthalmos secondary to the reduction of the palpebral fissure can appear. It is caused by an interruption of the sympathetic pathway that extends from the hypothalamus to the orbit. Because there is no decussation, the signs are homolateral to the lesion. Traditionally, it is classified as congenital and acquired. Occasionally, it is associated with neoplasias such as neuroblastoma. It remains controversial what imaging studies should be requested as a protocolized workup of this neurological syndrome in a patient. We report the case of a 45-day-old infant with congenital Horner syndrome.
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