Estudio de opinion a egresados de la carrera de Contador Publico y Auditor de la Universidad de Talca Cohortes 1989-2000. Proyecto Face: Informacion para el proceso de Acreditacion

107 p.La Facultad de Ciencias Empresariales de la Universidad de Talca, forma estudiantes del área de negocios, que al egresar, se insertan en un mundo cada vez mas exigente de profesionales altamente calificados que apoyen la gestión de las organizaciones. En este contexto es fundamental el establecimiento de sistemas de mejoramiento continuo de la educación basados en altos estándares de calidad y apoyados por información sobre el desempeño y las expectativas de los individuos en el mercado laboral. Para la consecución de dicha información, se propone un sistema de auto evaluación, en donde sean los propios egresados quienes opinen sobre la formación recibida y su utilidad. La investigación se centra en explorar la opinión de los egresados de la carrera de Contador Publico y Auditor de la Universidad de Talca respecto de la educación recibida de esta universidad y describir la evolución laboral por cohorte 1989 - 2000. El diseño incluye un profundo estudio exploratorio para obtener información relevante a ser considerada en la medición final. Enseguida se aplica un estudio de tipo descriptivo concluyente, de sección transversal, realizado por medio de una encuesta que se instrumenta con un cuestionario estructurado el cual se construye con la información obtenida del estudio exploratorio, para luego ser piloteado y modificado de acuerdo con Ios hallazgos de este proceso y finalmente ser aplicado a una muestra estadística, estratificada por cohorte de la población, con error de E=5.9% y un nivel de confianza Z=95%. Los resultados de la aplicación del instrumento fueron procesados y analizados en forma descriptiva e inferencial, por medio de avanzados software estadísticos, pudiéndose concluir que en general existe una buena evaluación de la calidad de los docentes y de la infraestructura y de las habilidades técnicas recibidas, pero no así en el manejo de recursos informáticos y de idiomas. El nivel de ocupación de los egresados es bueno 92%, y en su progresión laboral se observa una tendencia positiva, evidenciada por aumentos graduales de remuneración, ascensos y el destino ocupacional. Finalmente, se recomienda la utilización de este sistema de medición y su posterior perfeccionamiento, ya que la información emanada es de gran utilidad para el mejoramiento de la gestión de la Facultad de Ciencias Empresariales, porque permite identificar claramente las fortalezas y debilidades en la formación sus Contadores Publico y Auditor, según la opinión de los propios egresados

High efficient luminescence in type-II GaAsSb-capped InAs quantum dots upon annealing

The photoluminescence efficiency of GaAsSb-capped InAs/GaAs type II quantum dots (QDs) can be greatly enhanced by rapid thermal annealing while preserving long radiative lifetimes which are ∼20 times larger than in standard GaAs-capped InAs/GaAs QDs. Despite the reduced electron-hole wavefunction overlap, the type-II samples are more efficient than the type-I counterparts in terms of luminescence, showing a great potential for device applications. Strain-driven In-Ga intermixing during annealing is found to modify the QD shape and composition, while As-Sb exchange is inhibited, allowing to keep the type-II structure. Sb is only redistributed within the capping layer giving rise to a more homogeneous composition

Evaluation of the In desorption during the capped process in diluted nitride In(Ga)As quantum dots

Diluted nitride self-assembled In(Ga)AsN quantum dots (QDs) grown on GaAs substrates are potential candidates to emit in the windows of maximum transmittance for optical fibres (1.3-1.55 μm). In this paper, we analyse the effect of nitrogen addition on the indium desorption occurring during the capping process of InxGa1−xAs QDs (x = l and 0.7). The samples have been grown by molecular beam epitaxy and studied through transmission electron microscopy (TEM) and photoluminescence techniques. The composition distribution inside the dots was determined by statistical moiré analysis and measured by energy dispersive X-ray spectroscopy. First, the addition of nitrogen in In(Ga)As QDs gave rise to a strong redshift in the emission peak, together with a large loss of intensity and monochromaticity. Moreover, these samples showed changes in the QDs morphology as well as an increase in the density of defects. The statistical compositional analysis displayed a normal distribution in InAs QDs with an average In content of 0.7. Nevertheless, the addition of Ga and/or N leads to a bimodal distribution of the Indium content with two separated QD populations. We suggest that the nitrogen incorporation enhances the indium fixation inside the QDs where the indium/gallium ratio plays an important role in this process. The strong redshift observed in the PL should be explained not only by the N incorporation but also by the higher In content inside the QD

Online Deniability for Multiparty Protocols with Applications to Externally Anonymous Authentication

In the problem of anonymous authentication (Boneh et al. CCS 1999), a sender wishes to authenticate a message to a given recipient in a way that preserves anonymity: the recipient does not know the identity of the sender and only is assured that the sender belongs to some authorized set. Although solutions for the problem exist (for example, by using ring signatures, e.g. Naor, Crypto 2002), they provide no security when the anonymity set is a singleton. This work is motivated by the question of whether there is any type of anonymity possible in this scenario. It turns out that we can still protect the identity of all senders (authorized or not) if we shift our concern from preventing the identity information be revealed to the recipient to preventing it could be revealed to an external entity, other than the recipient. We define a natural functionality which provides such guarantees and we denote it by F_{eaa} for externally anonymous authenticated channel. We argue that any realization of F_{eaa} must be deniable in the sense of Dodis et al. TCC 2009. To prove the deniability of similar primitives, previous work defined ad hoc notions of deniability for each task, and then each notion was showed equivalent to realizing the primitive in the Generalized Universal Composability framework (GUC, Canetti et al. TCC 2007). Instead, we put forward the question of whether deniability can be defined independently from any particular task. We answer this question in the affirmative providing a natural extension of the definition of Dodis et al. for arbitrary multiparty protocols. Furthermore, we show that a protocol satisfies this definition if an only if it realizes the ideal functionality F_{eaa} in the GUC framework. This result enables us to prove that most GUC functionalities we are aware of (and their realizations) are deniable. We conclude by applying our results to the construction of a deniable protocol that realizes F_{eaa}

Sublittoral soft bottom communities and diversity of Mejillones Bay in northern Chile (Humboldt Current upwelling system)

The macrozoobenthos of Mejillones Bay (23°S; Humboldt Current) was quantitatively investigated over a 7-year period from austral summer 1995/1996 to winter 2002. About 78 van Veen grab samples taken at six stations (5, 10, 20 m depth) provided the basis for the analysis of the distribution of 60 species and 28 families of benthic invertebrates, as well as of their abundance and biomass. Mean abundance (2,119 individuals m-2) was in the same order compared to a previous investigation; mean biomass (966 g formalin wet mass m-2), however, exceeded prior estimations mainly due to the dominance of the bivalve Aulacomya ater. About 43% of the taxa inhabited the complete depth range. Mean taxonomic Shannon diversity (H', Log e) was 1.54 ± 0.58 with a maximum at 20 m (1.95 ± 0.33); evenness increased with depth. The fauna was numerically dominated by carnivorous gastropods, polychaetes and crustaceans (48%). About 15% of the species were suspensivorous, 13% sedimentivorous, 11% detritivorous, 7% omnivorous and 6% herbivorous. Cluster analyses showed a significant difference between the shallow and the deeper stations. Gammarid amphipods and the polychaete family Nephtyidae characterized the 5-mzone, the molluscs Aulacomya ater, Mitrella unifasciata and gammarids the intermediate zone, while the gastropod Nassarius gayi and the polychaete family Nereidae were most prominent at the deeper stations. The communities of the three depth zones did not appear to be limited by hypoxia during non-El Niño conditions. Therefore, no typical change in community structure occurred during El Niño 1997–1998, in contrast to what was observed for deeper faunal assemblages and hypoxic bays elsewhere in the coastal Humboldt Current system

AHP-based design method of a lightweight, portable and flexible air-based PV-T module for UAV shelter hangars

The use of renewable energy is spreading also to the military field. Its implementation in army forward bases has three clear advantages: an economic benefit lowering consumptions, an environmental profit reducing emissions, and a strategic interest minimizing risks in supplies. This paper presents a methodology for the design of a photovoltaic-thermal system (PV-T) to supply heat and electricity to military tents in forward facilities. UAV shelter hangars used by infantry forces have been chosen to implement this equipment. Analytic Hierarchy Process (AHP) has been chosen to explain its application to designing the PV-T system. A CFD analysis of different design alternatives was performed in order to quantify decision making criteria and subcriteria. The best performance design was used to build a test bench of the system, using an Arduino-based platform. Telemetry is used to remotely register PV-T module parameters. Experimental data obtained was implemented as boundary conditions to validate the CFD model of the PV-T system, and heat exchange models were implemented using UDF (user defined functions) in ANSYS® FLUENT®. A making decision method was successfully applied to define a methodology for geometrical design, using CFD simulation to determine necessary parameters to quantify criteria and subcriteria defined in the AHP

Categorizing facial creases: A review

Ensuring uniformity in the nomenclature standardization of facial creases is important to enable the scholarly community to follow and debate the advancements in research. This review highlights the prevailing disparity in the nomenclature that refers to the same facial crease by researchers and laypeople, and suggests uniform names for the facial creases based on available literature. The previous and current trends in facial crease classification are also discussed. The nomenclature of the facial creases considered for this review include the following: the nasolabial fold, corner of the mouth lines, upper and lower lip creases around the mouth region, the mandibular folds, the bifid nose, the transverse nasal line, the vertical glabellar line, chin crease, the mental crease, four type of creases around the eyes, forehead creases, and periauricular creases. A figure illustrating the above facial creases is included as reference. It is hoped that the proposed standardization of nomenclature would ensure a more scientific referencing of facial creases enabling more effective scientific interaction among the scholarly community as well as the laypeople interested in the research and application of facial creases

Violencia en relaciones de noviazgo en hombres y mujeres estudiantes de una universidad privada de Trujillo

La presente investigación tuvo como objetivo comparar la violencia en relaciones de noviazgo en hombres y mujeres estudiantes de una universidad privada de Trujillo. La investigación fue de tipo no experimental, aplicada, cuantitativa y descriptiva-comparativa. Asimismo, como población - muestra se consideró a 126 estudiantes universitarios de primer a décimo ciclo de pregrado en una universidad privada de Trujillo (de los cuales 63 fueron hombres y 63 mujeres respectivamente). El instrumento utilizado fue el Cuestionario de Violencia entre Novios (CUVINO), adaptado en Trujillo por Alayo (2017) el cual fue compuesto por ocho dimensiones. El análisis se realizó por medio de la prueba U de Mann-Whitney, teniendo como resultado que, no existen diferencias significativas en cuanto a violencia en relaciones de noviazgo a nivel general, así como también, en seis de sus ocho dimensiones, exceptuando las dimensiones de violencia física y castigo emocional. En conclusión, se comparó la violencia en el noviazgo, encontrándose que no existen diferencias a nivel general entre los hombres y mujeres