Memória e resistência na migraçao para a Amazônia : O caso de Nova Londrina em Ji-Paraná, estado de Rondônia, Brasil

The occupation of Rondônia, from the 1970s, occurred in a disorganized way, since it attracted an amount of migrants which was much bigger than the settling projects could sustain. The aim of this research was to analyze the circumstances in which the district of Nova Londrina was settled, utilizing for this reason a bibliographic survey, as well as the Oral History method. The arrival in Nova Londrina, Ji-Paraná, was highlighted by conflicts between the settlers and the settling company Calama S/A. In spite of the company's violence, the colonists resisted until there was an intervention from INCRA, through a land regularization program. In this context, the Urban Center for Rural Support (NUAR) was implanted, intending to support the agricultural workers

Memória e resistência na migraçao para a Amazônia : O caso de Nova Londrina em Ji-Paraná, estado de Rondônia, Brasil

The occupation of Rondônia, from the 1970s, occurred in a disorganized way, since it attracted an amount of migrants which was much bigger than the settling projects could sustain. The aim of this research was to analyze the circumstances in which the district of Nova Londrina was settled, utilizing for this reason a bibliographic survey, as well as the Oral History method. The arrival in Nova Londrina, Ji-Paraná, was highlighted by conflicts between the settlers and the settling company Calama S/A. In spite of the company's violence, the colonists resisted until there was an intervention from INCRA, through a land regularization program. In this context, the Urban Center for Rural Support (NUAR) was implanted, intending to support the agricultural workers

Trayectorias laborales y habitacionales en hogares de un asentamiento en el área metropolitana del Gran Resistencia (AMGR), Chaco, Argentina

En este artículo abordamos el trabajo y la habitación como dos dimensiones centrales en la reproducción de la vida, enfatizando la realimentación mutua de ambas dimensiones. Caracterizamos las estrategias desplegadas por un conjunto de familias en un asentamiento en proceso de regularización urbana y dominial de la ciudad de Resistencia, capital de la Provincia del Chaco, en el Nordeste argentino. El trabajo de campo se realizó en el marco de una investigación de tesis de Licenciatura en Relaciones Laborales (RRLL) en la Universidad Nacional del Nordeste (UNNE) entre fines del año 2008 y principios del año 2009 y, si bien se basa en un conjunto de entrevistas a residentes de dicho asentamiento, se han puesto en relación un conjunto de indicadores que permiten contextualizar estas visiones subjetivas. La integración a redes de intercambio en diferentes niveles ?comunitario, a través de la integración en una ong o movimiento social, a nivel de las familias y dentro de las unidades domésticas? va construyendo un capital social colectivo que les permite reproducirse socialmente. Este abordaje, tributario de las formulaciones de Bourdieu, nos ha permitido resignificar prácticas, ampliando la noción de trabajo a la de estrategias de reproducción de la vida. Nuestro interés fue describir cómo algunas familias relatan e interpretan sus propias experiencias en relación con sus estrategias de supervivencia. El artículo avanza en una tipologización de las trayectorias estudiadas

Memória e resistência na migraçao para a Amazônia : O caso de Nova Londrina em Ji-Paraná, estado de Rondônia, Brasil

The occupation of Rondônia, from the 1970s, occurred in a disorganized way, since it attracted an amount of migrants which was much bigger than the settling projects could sustain. The aim of this research was to analyze the circumstances in which the district of Nova Londrina was settled, utilizing for this reason a bibliographic survey, as well as the Oral History method. The arrival in Nova Londrina, Ji-Paraná, was highlighted by conflicts between the settlers and the settling company Calama S/A. In spite of the company's violence, the colonists resisted until there was an intervention from INCRA, through a land regularization program. In this context, the Urban Center for Rural Support (NUAR) was implanted, intending to support the agricultural workers

Trayectorias laborales y habitacionales en hogares de un asentamiento en el área metropolitana del Gran Resistencia (AMGR), Chaco, Argentina

En este artículo abordamos el trabajo y la habitación como dos dimensiones centrales en la reproducción de la vida, enfatizando la realimentación mutua de ambas dimensiones. Caracterizamos las estrategias desplegadas por un conjunto de familias en un asentamiento en proceso de regularización urbana y dominial de la ciudad de Resistencia, capital de la Provincia del Chaco, en el Nordeste argentino. El trabajo de campo se realizó en el marco de una investigación de tesis de Licenciatura en Relaciones Laborales (RRLL) en la Universidad Nacional del Nordeste (UNNE) entre fines del año 2008 y principios del año 2009 y, si bien se basa en un conjunto de entrevistas a residentes de dicho asentamiento, se han puesto en relación un conjunto de indicadores que permiten contextualizar estas visiones subjetivas. La integración a redes de intercambio en diferentes niveles ?comunitario, a través de la integración en una ong o movimiento social, a nivel de las familias y dentro de las unidades domésticas? va construyendo un capital social colectivo que les permite reproducirse socialmente. Este abordaje, tributario de las formulaciones de Bourdieu, nos ha permitido resignificar prácticas, ampliando la noción de trabajo a la de estrategias de reproducción de la vida. Nuestro interés fue describir cómo algunas familias relatan e interpretan sus propias experiencias en relación con sus estrategias de supervivencia. El artículo avanza en una tipologización de las trayectorias estudiadas

Memória e resistência na migraçao para a Amazônia : O caso de Nova Londrina em Ji-Paraná, estado de Rondônia, Brasil

The occupation of Rondônia, from the 1970s, occurred in a disorganized way, since it attracted an amount of migrants which was much bigger than the settling projects could sustain. The aim of this research was to analyze the circumstances in which the district of Nova Londrina was settled, utilizing for this reason a bibliographic survey, as well as the Oral History method. The arrival in Nova Londrina, Ji-Paraná, was highlighted by conflicts between the settlers and the settling company Calama S/A. In spite of the company's violence, the colonists resisted until there was an intervention from INCRA, through a land regularization program. In this context, the Urban Center for Rural Support (NUAR) was implanted, intending to support the agricultural workers

Rock magnetism and paleomagnetism of basalts at DSDP Leg 65 Holes

We investigated the magnetic and paleomagnetic properties of 77 basalt samples from Holes 482, 482C, 482D, 483, 483B, 485, and 485A in order to study the structure and development of the ocean's crust. During the course of this study, we measured the natural remanent magnetization, Jn, and its stability in an alternating magnetic field; the magnetic susceptibility, x; the saturation magnetization, Js; the saturation remanent magnetization, Jrs; the coercivity of maximum remanence, HCR; and the median destructive fields MDFn (for Jn) and MDFs for Jrs. A thermomagnetic analysis for Js and Jrs was also performed; these latter measurements were made on the same samples.

Chemical composition of rocks and minerals from the Doldrums and Arkhangelsky Fracture Zones

The book deals with results of complex geological and geophysical studies in the Doldrums and Arkhangelsky Fracture Zones of the Central Atlantic. Description of the main features of bottom relief, sediments and crustal structure, geomagnetic field, composition of igneous and sedimentary rocks are given in the book. The authors made conclusions on tectonic delamination of the oceanic crust and existence of specific rock complexes forming non-spreading blocks

Forward Stagewise Naive Bayes

The naïve Bayes approach is a simple but often satisfactory method for supervised classification. In this paper, we focus on the naïve Bayes model and propose the application of regularization techniques to learn a naïve Bayes classifier. The main contribution of the paper is a stagewise version of the selective naïve Bayes, which can be considered a regularized version of the naïve Bayes model. We call it forward stagewise naïve Bayes. For comparison’s sake, we also introduce an explicitly regularized formulation of the naïve Bayes model, where conditional independence (absence of arcs) is promoted via an L 1/L 2-group penalty on the parameters that define the conditional probability distributions. Although already published in the literature, this idea has only been applied for continuous predictors. We extend this formulation to discrete predictors and propose a modification that yields an adaptive penalization. We show that, whereas the L 1/L 2 group penalty formulation only discards irrelevant predictors, the forward stagewise naïve Bayes can discard both irrelevant and redundant predictors, which are known to be harmful for the naïve Bayes classifier. Both approaches, however, usually improve the classical naïve Bayes model’s accuracy.

Learning an L1-regularized Gaussian Bayesian Network in the Equivalence Class Space

Learning the structure of a graphical model from data is a common task in a wide range of practical applications. In this paper, we focus on Gaussian Bayesian networks, i.e., on continuous data and directed acyclic graphs with a joint probability density of all variables given by a Gaussian. We propose to work in an equivalence class search space, specifically using the k-greedy equivalence search algorithm. This, combined with regularization techniques to guide the structure search, can learn sparse networks close to the one that generated the data. We provide results on some synthetic networks and on modeling the gene network of the two biological pathways regulating the biosynthesis of isoprenoids for the Arabidopsis thaliana plant

Lazy Lasso for local regression

Locally weighted regression is a technique that predicts the response for new data items from their neighbors in the training data set, where closer data items are assigned higher weights in the prediction. However, the original method may suffer from overfitting and fail to select the relevant variables. In this paper we propose combining a regularization approach with locally weighted regression to achieve sparse models. Specifically, the lasso is a shrinkage and selection method for linear regression. We present an algorithm that embeds lasso in an iterative procedure that alternatively computes weights and performs lasso-wise regression. The algorithm is tested on three synthetic scenarios and two real data sets. Results show that the proposed method outperforms linear and local models for several kinds of scenarios

A Variational Stereo Method for the Three-Dimensional Reconstruction of Ocean Waves

We develop a novel remote sensing technique for the observation of waves on the ocean surface. Our method infers the 3-D waveform and radiance of oceanic sea states via a variational stereo imagery formulation. In this setting, the shape and radiance of the wave surface are given by minimizers of a composite energy functional that combines a photometric matching term along with regularization terms involving the smoothness of the unknowns. The desired ocean surface shape and radiance are the solution of a system of coupled partial differential equations derived from the optimality conditions of the energy functional. The proposed method is naturally extended to study the spatiotemporal dynamics of ocean waves and applied to three sets of stereo video data. Statistical and spectral analysis are carried out. Our results provide evidence that the observed omnidirectional wavenumber spectrum S(k) decays as k-2.5 is in agreement with Zakharov's theory (1999). Furthermore, the 3-D spectrum of the reconstructed wave surface is exploited to estimate wave dispersion and currents.

Estudio de la tecnología de identificación por radiofrecuencia, desarrollo y aplicaciones, seguridad, amenazas y mal uso

Resumen Ejecutivo Desde hace unos años, la tecnología RFID parece estar tecnológicamente madura, aunque se halla inmersa en una continua evolución y mejora de sus prestaciones frente a la tecnología basada en el código de barras. Esta tecnología está empezando a aumentar su comercialización y uso generalizado. Este proyecto describe su funcionamiento y arquitectura, las aplicaciones e implementaciones reales en diversos sectores empresariales y soluciones o propuestas para mejorar y fomentar investigaciones, desarrollos e implementaciones futuras. Una primera parte consiste en el desarrollo teórico del funcionamiento, parámetros físicos y la arquitectura RFID. En la segunda parte se estudian las aplicaciones potenciales, beneficios e inconvenientes y varios puntos de vista; empresas que invierten a favor de RFID y han realizado implementaciones reales exitosas y organizaciones en contra. La tercera y última parte analiza las consecuencias negativas que supone un mal uso de la tecnología como la pérdida de privacidad o confidencialidad, se proponen algunas medidas de seguridad y soluciones al problema utilizando la regularización y estandarización. Finalmente, tras estudiar la tecnología RFID, se aportan algunas conclusiones de carácter actual y de futuro después de observar resultados de expectativas previstas. Executive Summary For several years, RFID technology seems to be technologically mature, but is immersed in a continuous evolution and improvement of their performance than the technology based on the barcode. This technology is starting to increase their marketing and widespread use. This project describes its operation and architecture, applications and real implementations in different business sectors and solutions or proposals to improve and enhance research, development and future implementations. The first part consists of theory development of the operation, physical parameters and architecture RFID. The second part focuses on the potential applications, benefits and drawbacks and several points of view; companies investing on behalf of RFID and have made successful actual deployments and organizations against. The third and last part discusses the negative impact that is a bad use of technology such as loss of privacy or confidentiality; suggest some security measures and solutions to the problem using regularization and standardization. Finally, it provides some conclusions of the current character, after studying RFID technology and the future after observing results of expectations.