Health and indigenous peoples in Chile: A Social Medicine perspective

Objectives: This article has two objectives: to conduct an analysis of the Intercultural Health proposals in Araucanía, Chile, and to identify contributions to horizontalization of relations between medical systems

Bankruptcy and cross-country differences in productivity

This is the author accepted manuscript. The final version is available from Elsevier via the DOI in this recordFor a sample of OECD countries, I document a systematic positive relationship between (i) aggregate productivity, (ii) the employment share by large firms and (iii) the proportion of large firms in the economy. I propose that differences in bankruptcy procedures can explain this relationship. In a model of financial intermediation and informational frictions, I show that as bankruptcy procedures worsen—measured by the amount a lender can recover from bankrupt borrowers—lenders respond by (i) shifting their portfolio of loans to smaller (less productive) firms and (ii) lending less. This finding is supported by empirical evidence: across countries, efficient bankruptcy procedures are associated with a higher proportion of new bank loans allocated to large firms. In the model, moving the level of recovery rate from the U.S. level to that of the lowest recovery rate country in the OECD sample reduces TFP by around 30 percent

On the truncation of the harmonic oscillator wavepacket

We present an interesting result regarding the implication of truncating the wavepacket of the harmonic oscillator. We show that disregarding the non-significant tails of a function which is the superposition of eigenfunctions of the harmonic oscillator has a remarkable consequence: namely, there exist infinitely many different superpositions giving rise to the same function on the interval. Uniqueness, in the case of a wavepacket, is restored by a postulate of quantum mechanics

Constructive approximations to the q=1/2 maximum entropy distribution from redundant and noisy data

An approach adopted to consider the problem of constructing the q=1/2 maximum entropy distribution from redundant and noisy data was discussed. The advantage of this generalized approach, when dealing with very noisy data was illustrated by a numerical simulation. A strategy was proposed that evolved through different steps such as independent constraints were first preselected by recourse to a data independent technique. A backward approach was also proposed for reducing the parameters of such distributions. It was found that the sub-optimal strategies could be utilized in a broad range of situations

Evolución geomorfológica del Llano de Azua (Sur de la República Dominicana)

La región del Llano de Azua se localiza en el extremo oriental de las cuencas neógenas de La Española, en el ámbito de la Bahía de Ocoa. Su relieve ha sufrido importantes modificaciones a lo largo del Cuaternario debido a la acción rejuvenecedora de los procesos tectónicos y la labor destructiva de los exógenos. Los procesos internos han generado abundantes formas estructurales de origen tectónico, causadas fundamentalmente por el avance de la Cordillera Central sobre la cuenca de Azua, la indentación de la cresta oceánica de Beata y la actividad de las fallas de desgarre E-O, relacionadas con la falla de Enriquillo-Plantain Garden. Los procesos externos han creado una mayor variedad de formas, destacando las de origen fluvial. La combinación de ambos tipos de procesos ha condicionado una pauta de evolución del relieve en la que destacan la tendencia a la elevación con respecto al nivel del mar, el retroceso de la línea de costa, las modificaciones de la geometría de la red de drenaje y el arqueamiento tectónico de las formas de los sectores central y oriental.The Llano de Azua region is located in the eastern border of the Hispaniola Neogene basins, in the Ocoa Bay sector. During the Quaternary its relief has been modelled by active tectonics and destructive exogenous processes. The tectonic activity have originated a variety of structural landforms related to the thrusting of the Cordillera Central over the Azua basin, to the NE-displacement of the Beata ridge indenter, and to the strike-slip faults of the Enriquillo-Plantain Garden system. The exogenous processes created larger variety of landforms, mainly of fluvial character. The relief in the area evolved by regional uplift, backward movement of the coastline, variations of drainage pattern and the tectonic curvature of the central-eastern landforms

Past, Present, and Future of Simultaneous Localization And Mapping: Towards the Robust-Perception Age

Simultaneous Localization and Mapping (SLAM)consists in the concurrent construction of a model of the environment (the map), and the estimation of the state of the robot moving within it. The SLAM community has made astonishing progress over the last 30 years, enabling large-scale real-world applications, and witnessing a steady transition of this technology to industry. We survey the current state of SLAM. We start by presenting what is now the de-facto standard formulation for SLAM. We then review related work, covering a broad set of topics including robustness and scalability in long-term mapping, metric and semantic representations for mapping, theoretical performance guarantees, active SLAM and exploration, and other new frontiers. This paper simultaneously serves as a position paper and tutorial to those who are users of SLAM. By looking at the published research with a critical eye, we delineate open challenges and new research issues, that still deserve careful scientific investigation. The paper also contains the authors' take on two questions that often animate discussions during robotics conferences: Do robots need SLAM? and Is SLAM solved

Contribución al estudio litológico de los materiales empleados en monumentos de Córdoba de distintas épocas

En este trabajo se estudian los diferentes tipos de materiales de construcción en monumentos de Córdoba durante distintas épocas y culturas. Se han utilizado las técnicas habituales para la determinación mineralógica, química , petroestructural, etc. Los materiales más empleados son las biocalcarenitas del Mioceno. También se han empleado calizas cámbricas, calizas del Titónico, mármoles, granitos, esquistos, ladrillos, tierra prensada, etc. Se citan algunos monumentos realizados en las épocas: romana, árabe, s. XIII al XIX y s. XX.This work studies the different types of construction materials in monuments in Cordova during different eras and cultures. Usual techniques have been used to determine mineralogical, chemical and petrostructural elements, etc. The most used materials are biocalcarenites from the Miocene period. Other materials include Cambrian limestone, Tithonian limestone, marble, granite, slate, bricks, pressed earth, etc. Monuments are cited from Roman and Arabic eras, and from the 8th to the 19th and 20th century