A virtual contradiction between international migration and human rights

Includes bibliographyAbstract If there is a geographical area that will be particularly affected by the tragedy of September 11, that will be the international borders of the United States. It is understandable that a country that enters in a state of war after been attacked with enormous losses, reacts by closing its international borders. Such immediate reaction has now been substituted by a more strict control over everything that crosses the border but, a fact remains, the border life is not going to be what it used to before September 11. In the short run, everything that crosses the border has slowed down by new controls. In the long run many things will return to what it was before that Tuesday, but for a long while, life at the border will not be the same. An intense interaction of more than twelve million people from the two sides of the U.S.-Mexico border have made us live in many instances as if the border does not exist. This is the case among many of us in the way we practice our family life. For the planning of weddings, birthdays, reunions, ceremonies, the border is more virtual than real. This is reversed as we get more serious in what it means to the space where institutions, the laws and the governments reminds us that there is a line that marks the beginning and the end of two different nations

On the adequacy of Adams-Bashforth sampled-data models for characterizing complex underwater-vehicle dynamics with noisy measurements

In this paper the adequacy of high order interpolation-based approaches to describe highly perturbed complex dynamics in discrete time was analyzed. The analysis establishes features of the approaches related to modularity, consistency with the model order and the sampling times, and accuracy in disturbed contexts with noisy measurements. A detailed study of the sensitivity of local prediction errors under a high signal-to-noise ratio is carried out with analytical expressions in dependence of physical coefficients of the vehicle. The different interpolation-based approaches were illustrated with simulations using from an AUV-like (Autonomous Underwater Vehicle) system with a few degrees of freedom (DoF), to a ROV (Remotely Operated Vehicle) model of 6 DoF with complex navigation paths.Sociedad Argentina de Informática e Investigación Operativa (SADIO

A sensor for vision-based navigation in underwater path tracking with color and edge segmentation

This paper aims the design and implementation of a visionbased sensor for navigation of underwater vehicles with adaptive attributes. The objective pointed out is a sensor for tracking of underwater lines. The sensor employs a basic structure with a pixel-wise AND operation of binarized frames of separated channels HSV and an edgesegmented frame. The basic sensor performs well by good illuminated scenes. By significant drops of luminance, the efficiency falls. So an adaptive sensor is proposed over the basic structure. It operates on the brightness channel carrying out a maximization of contains in the accumulator bins of a Hough transformation. It has proven to enhanced the identification of the tracked line increasing the success rate.Sociedad Argentina de Informática e Investigación Operativa (SADIO

A sensor for vision-based navigation in underwater path tracking with color and edge segmentation

This paper aims the design and implementation of a visionbased sensor for navigation of underwater vehicles with adaptive attributes. The objective pointed out is a sensor for tracking of underwater lines. The sensor employs a basic structure with a pixel-wise AND operation of binarized frames of separated channels HSV and an edgesegmented frame. The basic sensor performs well by good illuminated scenes. By significant drops of luminance, the efficiency falls. So an adaptive sensor is proposed over the basic structure. It operates on the brightness channel carrying out a maximization of contains in the accumulator bins of a Hough transformation. It has proven to enhanced the identification of the tracked line increasing the success rate.Sociedad Argentina de Informática e Investigación Operativa (SADIO

A Real-Time Approach to Achieve Maximal Autonomy of Autonomous Underwater Vehicles in the Presence of Perturbing Flow Field

In this paper a preliminary study of optimal energy systems for autonomous underwater vehicles is presented. A method is developed for achieving maximal autonomy. A general algorithm was developed for the navigation in 6 degrees of freedom in a non-conservative flow field. It is shown that missions with selective starting point beginning with the direction of the flow are much more favorable for the autonomy.Sociedad Argentina de Informática e Investigación Operativ

Análisis de Oscilaciones No-Lineales en Sistemas Complejos de Mecánica e Hidrodinámica - Herramientas y Metodología

[ES] En este trabajo se presenta una metodología de análisis y simulación interactiva de sistemas dinámicos oscilantes de mecánica e hidrodinámica, involucrando a distintas herramientas especializadas en elementos finitos, dinámica de multi-cuerpos y análisis de bifurcaciones. La interconexión de herramientas las lleva a cabo el usuario mediante el desarrollo de programas propios para cálculo simbólico a partir de ecuaciones básicas de la dinámica. La estructura de la metodología responde al objetivo de concretar el estudio de estabilidad y comportamiento de dinámicas complejas, previos a una experimentación en laboratorio. Se presentan diversos ejemplos de aplicación en la Ingeniería Oceánica.Los autores agrade-cen al CONICET, SETCIP, DAAD y DIEC-UNS por elfinanciamiento de este trabajo.Jordán, MA.; Bustamante, JL. (2010). Análisis de Oscilaciones No-Lineales en Sistemas Complejos de Mecánica e Hidrodinámica - Herramientas y Metodología. Revista Iberoamericana de Automática e Informática industrial. 1(3):63-77. http://hdl.handle.net/10251/146585OJS63771

Desarrollo organizacional en las empresas de la Region del Maule

296 p.La presente investigación parte con la descripción de los objetivos e hipótesis planteadas, y la metodología seguida para lograrlos. Enseguida se expone un marco teórico sobre el Desarrollo Organizacional, y se explican los modelos de comportamiento de los cuales se obtuvieron las variables utilizadas para estructurar una encuesta que se aplico a una muestra de empresas regionales, con el objeto de realizar un diagnostico organizacional. Luego se procedió a un análisis de los datos, que permitió detectar que existen algunas funciones organizacionales que deben ser mejor utilizadas, tanto en forma particular como integral, de tal manera de que las empresas regionales alcancen condiciones para enfrentarse exitosamente al cambio

Quality assurance of surface wind observations from automated weather stations

Meteorological data of good quality arc important for understanding both global and regional climates In this respect, great efforts have been made to evaluate temperature- and precipitation-related records This study summarizes the evaluations made to date of the quality of wind speed and direction records acquired at 41 automated weather stations in the northeast of the Iberian Peninsula Observations were acquired from 1992 to 2005 at a temporal resolution of 10 and 30 min A quality assurance system was imposed to select) the records for 1) manipulation errors associated with storage and management of the data. 2) consistency limits to to ensure that observations ale within their natural limits of variation, and 3) temporal consistency to assess abnormally low/high variations in the individual time series In addition. the most important biases of the dataset are analyzed and corrected wherever possible A total of 1 8% wind speed and 3 7% wind direction records was assumed invalid. pointing to specific problems in wind measurement The study not only tiles to contribute to the science with the creation of a wind damsel of unmoved quality. but it also reports on potential errors that could be plc:sent in other wind dataset

Evaluation of Human Control in Teleoperation of Underwater Vehicles : Compative Study in Time and Frequency Domains

In this paper a study of teleoperation of remotely operated vehicles is carried out employing two sources of video, the inboard image and external camera. Additionally, a modeling of the human behavior during path tracking is performed. For this goal a structure of a nested control loop is supposed. The inner loop involves a high-performance digital controller, while the outer loop is composed by the human teleoperation. For modeling the human control actions a PID-like controller is proposed. The identification of the parameters of the PID is carried out in both domains, time and frequency. Features of these studies are based on experiments designed by simulations and on-line interaction of the teleoperator by means of a joystick.Sociedad Argentina de Informática e Investigación Operativ