37 research outputs found

    Supervised Classification: Quite a Brief Overview

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    The original problem of supervised classification considers the task of automatically assigning objects to their respective classes on the basis of numerical measurements derived from these objects. Classifiers are the tools that implement the actual functional mapping from these measurements---also called features or inputs---to the so-called class label---or output. The fields of pattern recognition and machine learning study ways of constructing such classifiers. The main idea behind supervised methods is that of learning from examples: given a number of example input-output relations, to what extent can the general mapping be learned that takes any new and unseen feature vector to its correct class? This chapter provides a basic introduction to the underlying ideas of how to come to a supervised classification problem. In addition, it provides an overview of some specific classification techniques, delves into the issues of object representation and classifier evaluation, and (very) briefly covers some variations on the basic supervised classification task that may also be of interest to the practitioner

    Diagn贸stico ambiental situacional del Cant贸n de Santo Domingo de Heredia, Costa Rica

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    Con el prop贸sito de fortalecer la capacidad t茅cnica ambiental de las Municipalidades, ubicadas dentro del 脕rea de Conservaci贸n Cordillera Volc谩nica Central (ACCVC), se ha creado una alianza estrat茅gica entre las Municipalidades, el Instituto de Fomento y Asesor铆a Municipal (IFAM) y el ACCVC, que promueva la participaci贸n activa de diversos actores locales y que permita crear mecanismos para fortalecer la capacidad t茅cnica de las municipalidades, en procura de una adecuada gesti贸n en el campo de los recursos naturales y ambiente. Adem谩s, el proyecto tiene como objetivo general facilitar el proceso de an谩lisis y discusi贸n, que permita la elaboraci贸n del Plan de Gesti贸n Ambiental Municipal, con la participaci贸n de las fuerzas vivas del cant贸n. En ese contexto, a trav茅s de referencias te贸ricas de investigaciones cualitativas (a fin de obtener informaciones m谩s subjetivas e intr铆nsecas de la interacci贸n de la poblaci贸n estudiada con los recursos disponibles), consultas a estudios realizados en el 谩rea y tema del estudio y talleres realizados en escuelas del cant贸n, el trabajo propone analizar el uso y explotaci贸n del territorio por la poblaci贸n del municipio de Santo Domingo de Heredia; identificando las principales problem谩ticas y proponiendo soluciones para las mismas. El objetivo principal es elaborar un diagn贸stico ambiental del cant贸n, buscando nuevas herramientas para elaboraci贸n del Plan Municipal de la Municipalidad de Santo Domingo de Heredia con participaci贸n de la comunidad.UCR::Vicerrector铆a de Vida Estudianti

    Diagnostic Tools for the Undulator System of the Seeded HGHG-FEL at MAX-lab

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    Within a collaboration between MAX-lab and BESSY a one stage seeded HGHG-FEL has been set up at Maxlab. BESSY has built the undulator system consisting of a modulator, a radiator and an electromagnetic chicane. BESSY has also installed three types of diagnostic tools: optical fibres for a fast Cherenkov beam loss detection, optical fibres for absolute dose measurements via their radiation-induced attenuation and THz detectors for the characterization of electron bunch properties. During first injections with a laser driven rf-gun the Cherenkov fibres have delivered detailed spatial information on the beam losses inside the beamline. Over the last year the second system, based on powermeter measurements, has detected a total dose of 180Gy. The high sensitivity and low drift of this system has been demonstrated. A THz detector behind the last dipole magnet close to the beam dump provides information on the bunch compression and the laser induced energy modulation. We report on the measurements performed with these diagnostics tools
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