Cartan Normal Conformal Connections from Pairs of 2nd Order PDE's

We explore the different geometric structures that can be constructed from the class of pairs of 2nd order PDE's that satisfy the condition of a vanishing generalized W\"{u}nschmann invariant. This condition arises naturally from the requirement of a vanishing torsion tensor. In particular, we find that from this class of PDE's we can obtain all four-dimensional conformal Lorentzian metrics as well as all Cartan normal conformal O(4,2) connections. To conclude, we briefly discuss how the conformal Einstein equations can be imposed by further restricting our class of PDE's to those satisfying additional differential conditions.Comment: 39 page

Globalización y convergencia de precios en el Imperio español 1660-1810

En este trabajo se analiza el comercio en el interior del Imperio español. Se utilizaron series de precios de productos durante un período de 140 años y se investigó su convergencia entre España y Perú y entre Perú y Chile. Se encontró que, a pesar de las mejoras tecnológicas, comerciales e institucionales, la convergencia de precios entre España y Perú se vio retrasada por las guerras durante el siglo XVIII. Por otra parte, se observa un notable proceso de convergencia de precios entre Perú y Chile. La ausencia de guerras en el Océano Pacífico puede explicar esta diferencia en el comportamiento de precios.In this paper trade to the interior of the Spanish Empire is analysed. Commodity prices during a 140 years span are described and the price convergence process between Spain and Peru, and between Peru and Chile is investigated. The main finding is that despite technological, trade and institutional improvements, price convergence between Spain and Peru was delayed by wars during the eighteenth century. Conversely, price convergence is found between Peru and Chile. The absence of wars in the Pacific Ocean can explain the difference in price behavior .Publicad

Valor de hiponatremia en predicción de mortalidad intrahospitalaria en cirrosis hepática descompensada. hospital Belén Minsa Trujillo periodo 2010 - 2014

Determinar si la hiponatremia tiene valor en la predicción de mortalidad intrahospitalaria en pacientes cirróticos en el Hospital Belén de Trujillo. Material y Métodos: Se realizó un estudio de tipo, analítico, observacional, retrospectivo, de cohortes. La población de estudio estuvo constituida por 100 pacientes con cirrosis hepática descompensada según criterios de inclusión y exclusión establecidos distribuidos en dos grupos: con hiponatremia y sin él. Resultados: La frecuencia de mortalidad intrahospitalaria en cirróticos descompensados con hiponatremia y sin él fue 40% y 14%, respectivamente. La hiponatremia condiciona un riesgo muestral de mortalidad de 2.86 el cual es significativo (p<0.05) y una sensibilidad, especificidad, valor predictivo positivo y negativo de 75%, 59%, 40% y 80%. Conclusiones: La hiponatremia tiene valor en la predicción de mortalidad intrahospitalaria en cirróticos descompensados. No se encontraron diferencias significativas en relación con la edad, sexo o clase funcional según escala de Child Pugh entre ambos grupos de estudio.Evaluate if hyponatremia has value to predict intrahospitalary mortality in cirrhotic patients at the Belen Hospital of Trujillo Methods: A clinical trial was carried out with 100 patients with decompensated cirrhosis distributed in 2 groups: with or without hyponatremia. Results: The frequency of mortality between with and without hyponatremia were 40% and 14 % respectively. Hyponatremia risk is related to mortality was 2.86 (p<0.05) with a sensibility, especificity, predictive positive and negative value were 75%, 59%, 40% y 80%. Conclusions: Hyponatremia has value to predict intrahospitalary mortality in cirrhotic patients at the Belen Hospital. There was not significant difference among the groups regarding the age, sex or functional classTesi

Políticas de memoria, legados del autoritarismo y calidad de la democracia : consideraciones para una comparación entre Brasil y Argentina

Within the context of the Cold War, Brazil and Argentina experienced national security dictatorships responsible for a many violations of human rights. With the transitions, Argentina and Brazil returned to democracy although persistence of a series of authoritarian legacies can be observed in the new social-political scenario. The present study analyzes: a) which legacies of authoritarianism currently remain in these countries; b) which public policies were pursued to deal with the crimes committed by the authoritarian regime; and c) how the maintenance of these authoritarian legacies can have repercussions in the quality of democracy.En el contexto de la Guerra Fría, Brasil y Argentina han pasado por dictaduras de Segu-ridad Nacional responsables por una masiva violación a los derechos humanos. Con las transicio-nes, Argentina y Brasil volvieron a ser democracias aunque persista un conjunto de legados del autoritarismo en el nuevo escenario social y político. Este estudio analiza: a) cuales legados del au-toritarismo están presentes en los países referidos; b) cuales las políticas públicas que fueron crea-das para hacer frente a los crímenes cometidos por el régimen autoritario; c) como los legados autoritarios pueden impactar en la calidad de la democracia

Subject Preference and Ergativity

This paper presents the first-ever processing experiment on relativization in Avar, an ergative language with prenominal relatives. The results show no processing difference between the ergative subject gap and the absolutive object gap. The absolutive subject gap, however, is processed much faster. We propose a principled explanation for this result. On the one hand, Avar has a subject preference (cf. the Accessibility Hierarchy, Keenan and Comrie, 1977), which would make the processing of the ergative and the absolutive subject gap easier than the processing of the absolutive object gap. On the other hand, the ergative DP in a relative clause serves as a strong cue that allows the parser to project the remainder of the clause, including the absolutive object DP (cf. Marantz, 1991, 2000); such morphological cueing favors the absolutive object gap. Thus, two processing preferences, the one for subject relatives and the other for morphologically cued clauses, cancel each other out in terms of processing difficulty. As a result, reading time results for the ergative subject and absolutive object relative clauses are very similar. The overall processing results are significantly different from what is found in accusative languages, where subject preference and morphological cueing reinforce each other, leading to a strong transitive subject advantage.Linguistic

The Perceptions and Experiences of Human Resources Recruiters Regarding Linkedin as an Online Personal Branding Representation of Recent Business Graduates

This study aimed to explore the perceptions and experiences of Human Resource Recruiters regarding LinkedIn as an online personal branding representation of recent business program graduates by using a phenomenological approach. The population of interest comprises Human Resource Recruiters that use LinkedIn and hire recent business graduates.The recordings and or transcripts of the interviews were utilized to conduct an interpretative phenomenological analysis to identify broader themes across the data set. The identified themes follow the same order as the questions conducted during the sessions. The five themes that emerged are (1) Social platforms utilized by HR recruiters, (2) HR recruiters\u27 experiences of using LinkedIn in recruiting recent business graduates, (3) The LinkedIn profile and personal branding, (4) LinkedIn impression management behaviors observed by HR recruiters as best practices by job candidates, and (5) HR recruiters recommendations for managing their profile to communicate a solid personal brand

Sobre el topónimo beocio Θεσπιαί

According to Pausanias (9,26,6), the Boeotian place name Thespiae (Θεσπιαί) stems either from Thespius (Θέσπιος), the mythic founder of the place, or from Thespia (Θέσπεια), daughter of Asopus. Its lexical basis may be the same as the epic word θέσπις ‘inspired by gods’. The aim of this paper is to examine this hypothetical etymological connexion which has not yet been studied in depth in order to suggest a plausible origin to the place name Θεσπιαί.El topónimo beocio Tespias (Θεσπιαί) procede, según Pausanias (9,26,6), bien del nombre del mítico fundador Tespio (Θέσπιος), bien del de la asópide Tespia (Θέσπεια), de modo que su base léxica sería la del epíteto épico θέσπις ‘inspirado por los dioses’. Este trabajo pretende examinar el alcance de esta hipotética relación etimológica, que no ha sido todavía suficientemente descrita, con el fin de proponer un origen verosímil para Θεσπιαί