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Sample records for sistemas lineares incertos

  1. Linear concentration system; Sistema de concentracion lineal

    Gonzalez Lugo, J.I; Leon Rovira, N; Aguayo Tellez, H [Instituto Tecnologico y de Estudios Superiores de Monterrey, Monterrey, Nuevo Leon (Mexico)]. E-mails: a00812662@itesm.mx; noel.leon@itesm.mx; haguayo@itesm.mx

    2013-03-15

    Solar linear concentration technologies to generate high temperatures are limited to the ranges of 200 to 500 degrees Celsius. While its performance has been tested through prototypes and pilot plants around the world, there are still areas of opportunity that can be exploited to obtain a linear concentration that achieves temperatures above this range in order to have a better use of the available solar energy. Because of this: It is possible to develop a linear concentration system that can track the sun with minimal movement of the absorber-receiver while maintaining temperatures above 850 degrees Celsius sufficient for industrial processes that require that temperature. The methodology consists of a series of stages (conceptual design, simulation, evaluation, development concept, results and validation) through which concepts are generated that allow design and evaluation of solar concentrator configurations with the help of simulation software. We have designed a linear parabolic concentrating system which comprises a set of mirrors segments with different focal lengths that works within the range of 600 degrees Celsius; however, it is advancing in the development of a double concentration to reach 850 degrees Celsius. [Spanish] Las tecnologias de concentracion lineal solar para generar altas temperaturas se ven limitadas a los rangos de 200 a 500 grados centigrados. Si bien su funcionamiento ha sido probado a traves de prototipos y plantas piloto alrededor del mundo, aun existen areas de oportunidad que pueden ser aprovechadas para obtener un sistema de concentracion lineal que permita alcanzar temperaturas mayores a este rango para asi tener un mejor aprovechamiento de la energia solar disponible. Debido a esto: Es posible desarrollar un sistema de concentracion lineal capaz de seguir la trayectoria del Sol con minimo movimiento del absorbedor-recibidor al mismo tiempo que mantiene temperaturas superiores a los 850 grados centigrados suficientes para

  2. sistemas

    Diego Alejandro Muñoz Gaviria

    2006-01-01

    Full Text Available El texto presentado a continuación, plantea en términos generales las principales posturas conceptuales del sociólogo alemán Niklas Luhmann sobre las ideas de Max Weber y su teoría de la acción social, y de Talcott Parsons y sus planteamientos en torno a la teoría de los sistemas sociales. Al final del escrito se hace especial énfasis en el rol protagónico que para Luhmann tienen las ciencias sociales y humanas en la autorreferencia del sistema social.

  3. Usando a história da resolução de alguns problemas para introduzir conceitos: sistemas lineares, determinantes e matrizes.

    Tavares, Agamenon Henrique de Carvalho

    2013-01-01

    Neste trabalho, estudamos o método apresentado no livro "Os nove capítulos sobre a arte matematica", escrito no século I da era cristã, a em de revelar como a história pode ser uma motivadora na introdução de tópicos da matemática do ensino médio. Através de observações dos padrões que se repetem no método apresentado, fomos capazes de introduzir, de maneira natural, o conceito de equações lineares, sistema de equações lineares, solução de sistemas de equações lineares, determi...

  4. Algoritmos paralelos numéricos para a resolução de sistemas de equações lineares

    Maria Paula Goncalves Fachin

    1989-01-01

    Apresentamos as características de algoritmos para obter a solução de sistemas de equações lineares, utilizando computadores com arquitetura paralela e explorando os recursos de paralelismo neles embutidos. São descritos os modelos de computadores paralelos e os procedimentos para a criação de algoritmos paralelos. The characteristics of algorithms to solve systems of linear equations, using parallel computers, are presented. The abstract models of these computers are described, as well as...

  5. Processamento visual da forma: análise de sistema linear e alguns paradigmas psicofísicos Visual processing of form: linear system analysis and some psychophysical paradigms

    Natanael Antonio dos Santos

    2002-01-01

    Full Text Available O objetivo deste trabalho é discutir alguns aspectos conceituais básicos da análise de Fourier enquanto ferramenta que fundamenta a perspectiva de filtros ou canais múltiplos de freqüências espaciais no estudo do processamento visual da forma. Serão também discutidos alguns dos principais paradigmas psicofísicos utilizados para caracterizar a resposta do sistema visual humano para filtros de freqüências espaciais de banda estreita. A análise de sistema linear e alguns paradigmas psicofísicos têm contribuído para o desenvolvimento teórico da percepção e do processamento visual da forma.The goal of this work is to discuss some basic aspects of Fourier analysis as a tool to be used in the approach of multiple channels of spatial frequencies on the study of visual processing of form. Some of the psychophysical paradigms more frequently used to characterize response of the human visual system to spatial frequency filter of narrow-band. The linear system analysis and some psychophysical paradigms have contributed to theoretical development of perception and of the visual processing of form.

  6. Aplicação de um Modelo Reológico Não-Linear em Sistemas Poliméricos Dilatantes Application of Non-Linear Rheological Model to Shear-Tickening Polymeric Systems

    Rômulo F. Navarro

    2002-01-01

    Full Text Available A dilatância é um comportamento reológico comum a vários sistemas poliméricos embora não ocorra em polímeros puros. Existem várias teorias aplicáveis à explicação desse fenômeno e alguns modelos matemáticos para o ajuste de dados experimentais de quatro de suas seis formas de ocorrência. Neste trabalho é dado enfoque à dilatância antecedida por um comportamento newtoniano e sucedida pelo comportamento pseudoplástico. Para ajustar dados constantes da literatura para sistemas desse tipo, é apresentado um modelo híbrido e não-linear. Para o teste do modelo foram utilizados dados existentes na literatura para solução de alfa,ômega poli(t-butilestireno em óleo mineral e suspensão de partículas do copolímero de estireno com acrilato de metila em solução aquosa de poli(ácido acrílico. O modelo proposto apresenta boa concordância com os dados experimentais.Shear-thickening (dilatant behavior is common in several polymeric systems, but not in pure polymers. There are many theories that can be used to describe shear-thickening and some mathematical models that fit experimental data of three of its six types: dilatant, newtonian-dilatant, newtonian-dilatant-pseudoplastic, viscoplastic-dilatant, pseudoplastic-dilatant and newtonian-pseudoplastic-newtonian-dilatant sequences. This work deals with the behavior of newtonian-dilatant-pseudoplastic sequence behavior and proposes a hybrid, non-linear and viscous model to fit the experimental data from systems that present such rheological behavior. The systems under investigation were: a solution of alpha,omega poly(t-butylstyrene in a mineral oil (3g/dl (sample 1 and b suspension of styrene -- methyl acrylate copolymer (S-co-MA particles (15% vol. in a poly(acrylic acid (PAA (1% wt and water solution (sample 2. The proposed model agrees with the experimental data analysed.

  7. Paralelização e comparação de métodos iterativos na solução de sistemas lineares grandes e esparsos

    Lauro Cássio Martins de Paula

    2013-11-01

    Full Text Available Apresenta-se neste trabalho uma comparação de desempenho computacional entre métodos iterativos utilizados para solução de sistemas lineares. O objetivo é mostrar que a utilização de processamento paralelo fornecido por uma Graphics Processing Unit (GPU pode ser viável, por viabilizar a solução rápida de sistemas de equações lineares, para que sistemas grandes e esparsos possam ser solucionados em um espaço curto de tempo. Para a validação do trabalho, utilizou-se uma GPU, por meio da arquitetura Compute Unified Device Architecture (CUDA, e comparou-se o desempenho computacional dos métodos iterativos de Jacobi, Gauss-Seidel, BiCGStab e BiCGStab(2 paralelizado na solução de sistemas lineares de tamanhos variados. Foi possível observar uma aceleração significativa nos testes com o método paralelizado, que se acentua consideravelmente na medida em que os sistemas aumentam. Os resultados mostraram que a aplicação de processamento paralelo em um método robusto e eficiente, tal como o BiCGStab(2, se torna muitas vezes indispensável, para que simulações sejam realizadas com qualidade e em tempo não proibitivo.Palavras-chave: CUDA. GPU. BiCGStab(2.Parallelization and comparison of interative methods in solving large and sparse linear systemsAbstractThis paper presents a computational performance comparison between some iterative methods used for linear systems solution. The goal is to show that the use of parallel processing provided by a Graphics Processing Unit (GPU may be more feasible, for making possible the fast solution of linear equations systems in order that complex and sparse problems can be solved in a short time. To validate the paper a GPU through the NVIDIA's Compute Unified Device Architecture (CUDA was employed and the computational performance was compared with Jacobi, Gauss-Seidel, BiCGStab iterative methods and BiCGStab(2 parallelized in the solution of linear systems of varying sizes. There was a

  8. ANTI-CIUDAD COMO INFRAESTRUCTURA. EL SISTEMA LINEAL CONTINUO DE OSKAR HANSEN / Anti-city as infrastructure. Oskar Hansen’s Linear Continuous System

    Marta López-Marcos

    2015-11-01

    Full Text Available RESUMEN Durante las décadas de la Guerra Fría, el continente europeo se encuentra sumido en un complejo proceso de transformación, reconstrucción y planteamiento de nuevos proyectos políticos y territoriales. Esta situación es especialmente convulsa en la franja centroeuropea, donde en estados como Hungría, Polonia o la antigua Yugoslavia se daban profundos debates acerca de su identidad y su organización geopolítica. El progresivo aperturismo hacia los países occidentales, junto a la necesidad de modernizar en profundidad los sistemas e infraestructuras estatales, sirvieron como catalizadores para la proliferación de grandes proyectos territoriales y urbanos con el fin no solo de mejorar la calidad de vida de los habitantes, sino también de reforzar la posición de dichos estados en el continente y el resto del mundo. Este texto se centra en el caso de la República Popular de Polonia, donde estas cuestiones se trataron con gran profusión desde diversas ramas. Concretamente, la propuesta del arquitecto Oskar Hansen para un Sistema Lineal Continuo aúna la visión socialista del estado como agente productor del espacio con la participación individual dentro del colectivo –siguiendo su Teoría de la Forma Abierta y sus conexiones con el Team X- sobre un soporte arquitectónico : un modelo de “anti-ciudad” que abriría cuestiones que todavía hoy permanecen vigentes. SUMMARY During the decades of the Cold War, Europe was plunged into a complex process of transformation, reconstruction and the emergence of new political and territorial projects. This situation caused particular upheaval in the central European strip, where states such as Hungary, Poland and the former Yugoslavia were struck by a profound quandary as to their identity and their geopolitical organisation. As they gradually opened up towards western countries and understood the need to drastically modernise the states’ systems and infrastructures, this triggered

  9. Linear correlation between components production and yield of rice upland in no-tillage Correlação linear entre componentes da produção e produtividade do arroz de terras altas em sistema plantio direto

    Amilton Ferreira da Silva

    2012-10-01

    Full Text Available The rice is one of the main sources of the humanity’s feeding. During the agricultural year 2009/2010, in Selvíria County, Mato Grosso do Sul State, in the Brazilian Savannah, an experiment was installed with rice upland in a Dystropherric Red Latosol (Typic Acrustox under no-tillage, irrigated by central pivot, with the purpose of selecting the best components production to explain the variability the irrigated rice yield upland. The geostatistical grid was installed, to collect the data, with 120 sampling points, in an area of 3.0 ha and and homogeneous slope of 0.055 m m-1. The medium rice yield was of the 5980 kg ha-1. For the simple lineal regressions, the number of spikelets grenades for panicle presented the best direct potential correlation with the yield rice, given for: PGO = 115,5.NEG0,770. However, for the multiple lineal regressions, the equation equação PGO = 2754,30-411,55.NEG-461,07.NEC+436,59. NET it was the one that better she came to esteem the yield rice. However, spatial, it was not possible to establish correlation between the yield rice and the components production, once none of those it presented spatial dependence in their data.O arroz é uma das principais fontes de alimentação da humanidade. Durante o ano agrícola 2009/2010, no município de Selvíria (MS, no Cerrado Brasileiro, foi instalado um experimento com arroz de terras altas em um Latossolo Vermelho distroférrico sob sistema plantio direto, irrigado por pivô central, com o objetivo de selecionar os melhores componentes da produção para explicar a variabilidade da produtividade do arroz de terras altas irrigado. Foi instalada a malha geoestatística, para a coleta de dados, com 120 pontos amostrais, numa área de 3,0 ha e declive homogêneo de 0,055 m m-1. A produtividade média de grãos de arroz foi de 5980 kg ha-1. Para as regressões lineares simples, o número de espiguetas granadas por panícula apresentou a melhor correlação potencial

  10. Simulación de sistemas eléctricos con cargas no lineales y variantes en el tiempo Simulation of electric systems with non-linear and time-variant loads

    William Carvajal Carreño

    2011-06-01

    Full Text Available En este artículo se propone una metodología, implementada en un programa de computador por medio de una interfase gráfica con el usuario (GUI, que permite simular redes eléctricas con elementos no lineales (principalmente convertidores de potencia, tanto en el dominio del tiempo como en el dominio de la frecuencia. El método propuesto combina dos tipos de análisis en una herramienta flexible, de forma que se puedan aprovechar las ventajas de cada uno de ellos, y que permita analizar sistemas lineales y no lineales en el dominio del tiempo, sistemas lineales en el dominio de la frecuencia y sistemas mixtos utilizando este método híbrido. La herramienta es un instrumento de cálculo versátil y completo que puede ser usado de una manera sencilla, para los estudios de análisis de propagación de armónicos en las redes eléctricas. Se presentan ejemplos extraídos de la bibliografía utilizada en cursos de sistemas de potencia, circuitos eléctricos y electrónica de potencia, así como sistemas de prueba para análisis de cargas no lineales o variantes en el tiempo, generados como marco de referencia para las simulaciones de armónicos. Se analizan los resultados y se hacen observaciones acerca de las características de convergencia y estabilidad algorítmica del método propuesto. Dada la complejidad y carga computacional del análisis del método híbrido propuesto, se han seleccionado modelos de elementos, modelos de los componentes del sistema y algoritmos apropiados, para que la solución del problema se realice dentro de límites razonables de tiempo de simulación y consumo de recursos del equipo de cómputo.This paper deals with a methodology implemented in a computer program with a Graphic User Interface (GUI that allows us to simulate electrical networks (mainly power converters with non linear elements. The proposed approach mixes two analysis types in a flexible tool, in that way, we can take advantage of the features of each

  11. Sistema Solar

    Federación de Asociaciones de Astronomía Cielo de Comellas

    2011-01-01

    Lección sobre el Sistema Solar. Curso de Astronomía Básica, segunda edición, impartido por los miembros de la Federación de Asociaciones de Astronomía Cielo de Comellas. Casa de la Ciencia, sábados, del 24 de septiembre al 22 de octubre de 2011

  12. Dosimetry of the stereotactic radiosurgery with linear accelerators equipped with micro multi-blades collimators; Dosimetria dos sistemas de radiocirurgia estereotaxica com aceleradores lineares equipados com colimadores micro multi-laminas

    Vieira, Andre Mozart de Miranda

    2008-07-01

    In this work, absorbed dose to water produced by the radiation beam of a clinical linear accelerator - CLINAC 600C{sup TM} (Varian), with a photon beam of 6 MV, were evaluated both theoretically and experimentally. This determination includes square and circular field configurations, the last one obtained with a micro multi leaf collimator - mMLC m3{sup TM} (Brain Lab). Theoretical evaluation was performed throughout Monte Carlo method. Experimental measurements of Percentage Depth Dose - PDD and derived Tissue Maximum Ratio - TMR curves from CLINAC 600C were validated by comparison with reference values as well as with measurements using different detectors. The results indicate local differences smaller than 5% and average differences smaller than 1,5% for each evaluated field, if they are compared to the previous commissioning values (made in 1999) and to the values of literature. Comparisons of ionization chamber and diode result in an average local difference of -0,6% for PDD measurements, and within 1% for lateral dose profiles, at depth, in the flat region. Diode provides measurements with better spatial resolution. Current output factors of open fields agree with reference values within 1,03% of discrepancy level. Current absorbed dose distributions in water are, now, considered reference values and allow characterization of this CLINAC for patient dose calculation. The photon spectra resulting from simulations with PENELOPE and MCNP codes agree approximately in 80% of the sampled points, in what average energies of (1,6 {+-} 0,3)MeV, with MCNP, and of (1,72 {+-} 0,08)MeV, with PENELOPE, are coincident. The created simple source model of the CLINAC 600C, using the PENELOPE code, allows one to calculate dose distributions in water, for open fields, with discrepancies of the order of {+-} 1,0% in dose and of {+-} 0,1 cm in position, if they are compared to experimental measurements. These values met the initial proposed criteria to validate the simulation

  13. Análise de um sistema de captura de energia piezoelétrico não linear e não ideal utilizando-se uma estrutura aporticada.

    Itamar Iliuk

    2016-01-01

    A crescente utilização de novas tecnologias, as quais necessitam de uma fonte de energia menor e mais eficiente, como os microssensores para monitoramento de sistemas e estruturas nas chamadas cidades inteligentes, torna a captura da energia do ambiente uma opção viável para alimentação de tais dispositivos. Como a energia cinética é uma fonte de energia facilmente encontrada no ambiente, os sistemas que a capturam e convertem em eletricidade têm sido amplamente estudados, especialmente os qu...

  14. Uso combinado de sistemas de informações geográficas para transportes e programação linear inteira mista em problemas de localização de instalações Combining geographic information systems for transportation and mixed integer linear programming in location-allocation problems

    Sílvia Maria Santana Mapa

    2012-01-01

    Full Text Available O objetivo do trabalho é avaliar a qualidade das soluções para o problema de localização-alocação de instalações geradas por um SIG-T (Sistema de Informação Geográfica para Transportes, obtidas após a utilização combinada das rotinas Localização de Facilidades e Problema do Transporte, quando comparadas com as soluções ótimas obtidas a partir de modelo matemático exato baseado em Programação Linear Inteira Mista (PLIM, desenvolvido externamente ao SIG. Os modelos foram aplicados a três simulações: a primeira propõe a abertura de fábricas e alocação de clientes no Estado de São Paulo; a segunda envolve um atacadista e um estudo de localização de centros de distribuição e alocação dos clientes varejistas; a terceira localiza creches em um contexto urbano, alocando a demanda. Os resultados mostraram que, quando se considera a capacidade das instalações, o modelo otimizante PLIM chegou a apresentar, em um dos cenários simulados, resultados até 37% melhores do que o SIG, além de propor locais diferentes para abertura de novas instalações. Quando não se considera a capacidade, o modelo SIG se mostrou tão eficiente quanto o modelo exato PLIM, chegando exatamente às mesmas soluções.This study aims to evaluate the quality of the solutions for facility location-allocation problems generated by a GIS-T (Geographic Information System for Transportation software. These solutions were obtained from combining the Facility Location and Transportation Problem routines, when compared with the optimal solutions, which were obtained using the exact mathematical model based on the Mixed Integer Linear Programming (MILP developed externally to the GIS. The models were applied to three simulations: the first one proposes set up businesses and customers' allocation in the state of São Paulo; the second involves a wholesaler and an investigation of distribution center location and retailers' allocation; and the third one

  15. Sistemas roboticos teleoperados

    Alexander Ceron Correa

    2005-01-01

    Full Text Available En el presente artículo se realiza una revisión general sobre los sistemas robóticos teleoperados, su estructura, componentes principales, clasificación, tipos de sensores, sistemas de locomoción y aplicaciones; como ejemplo se mencionan algunos trabajos realizados Colombia y en el mundo

  16. en tres sistemas agroforestales

    Javier Monge Meza

    2006-01-01

    Full Text Available Se estudió el desarrollo inicial (30 meses del duraznillo (Prunus annularis en tres sistemas agroforestales: duraznillo-maíz (Zea mays, duraznillomenta (Satureja viminea y duraznillo-naranjilla (Solanum quitoense, en un sitio en la zona de vida Bosque muy húmedo Montano Bajo, en Costa Rica. Se utilizaron cuatro parcelas de cada sistema agroforestal, con una densidad de 722 árboles/ ha, y un sistema de siembra de árboles en forma de triángulo equilátero, entre los que se intercaló el componente agrícola respectivo de cada sistema agroforestal. La altura media alcanzada por los árboles de duraznillo fue de 226,2, 221,4 y 164,3 cm, para el sistema agroforestal duraznillo-maíz, duraznillo- menta y duraznillo-naranjilla, respectivamente. En cuanto a los volúmenes, éstos variaron entre 0,58 y 1,30 m3/ha. Hubo una diferencia significativa en altura media entre el sistema agroforestal duraznillo-maíz y duraznillo-menta con respecto al de duraznillo-naranjilla. No hubo diferencias con respecto al volumen entre los sistemas de producción

  17. Quality control of virtual wedge in a linear electron accelerator with a computerized radiography system (CR); Control de calidad de la cuna virtual en un acelerador lineal de electrones mediante un sistema de radiografia competerizada (CR)

    Ordiales, J. M.; Alvarez, F. J.; Falero, B.

    2011-07-01

    For quality control of the virtual wedge there are several systems on the market as arrays of detectors or ionization chambers, linear or 2D configuration, radiochromic films or digital imaging systems incorporated in electron linear accelerators (ALE ). The present work aims at implementing a system of Computed Radiography (CR) for a routine check of the virtual wedge.

  18. ALGORITMO PARA LA SOLUCIÓN NUMÉRICA DE SISTEMAS DE ECUACIONES NO LINEALES MEDIANTE UNA ESTRATEGIA DE OPTIMIZACIÓN GLOBAL BASADA EN ANÁLISIS DE INTERVALOS ALGORÍTMO PARA A SOLUÇÃO NUMÉRICA DE SISTEMAS DE EQUAÇÕES NÃO LINEARES MEDIANTE UMA ESTRATÉGIA DE OTIMIZAÇÃO GLOBAL BASEADA EM ANÁLISE DE INTERVALOS AN ALGORITHM FOR NUMERICAL SOLUTION OF NONLINEAR EQUATIONS SYSTEMS USING A STRATEGY OF GLOBAL OPTIMIZATION BASED ON INTERVAL ANALYSIS

    Luis Antonio Gómez

    2012-12-01

    Full Text Available En este artículo se presenta un algoritmo para la solución numérica de sistemas de ecuaciones no lineales. Para este propósito el sistema de ecuaciones se convierte en una función de valor real para luego ser minimizada, en el sentido global, en un dominio inicial dado (una caja en n usando análisis de intervalos. El algoritmo diseñado tiene la capacidad de determinar la existencia o no de soluciones al sistema de ecuaciones en una caja dada. Las soluciones del sistema de ecuaciones, si existen dentro de la caja dada, son expresadas mediante encerramientos por subcajas cuyo tamaño es menor que la exactitud establecida. No hay restricción acerca de la relación entre el número de ecuaciones y el número de incógnitas del sistema. Se realiza además un análisis de la convergencia del algoritmo y se muestran los resultados de su aplicación para algunos problemas de prueba.Em este artigo apresenta-se um algoritmo para a solução numérica de sistemas de equações não lineares. Para este propósito o sistema de equações converte-se em uma função de valor real para logo ser minimizada, no sentido global, em um domínio inicial dado (uma caixa em n usando análise de intervalos. O algoritmo desenhado tem a capacidade de determinar a existência ou não de soluções ao sistema de equações em uma caixa dada. As soluções do sistema de equações, se existirem dentro da caixa dada, são expressas mediante fechamentos por subcaixas cujo tamanho é menor que a exatidão estabelecida. Não há restrição a respeito da relação entre o número de equações e o número de incógnitas do sistema. Realiza-se ademais uma análise da convergência do algoritmo e mostram-se os resultados de sua aplicação para alguns problemas de prova.In this paper an algorithm for the numerical solution of nonlinear equations systems is presented. For this purpose the system of equations becomes a function of real value which will be minimized, in the

  19. Dose optimization based on linear programming implemented in a system for treatment planning in Monte Carlo; Optimizacion de dosis basada en programacion lineal implemenetada en un un sistema para la planificacion de tratamiento en Monte Carlo

    Ureba, A.; Palma, B. A.; Leal, A.

    2011-07-01

    Develop a more efficient method of optimization in relation to time, based on linear programming designed to implement a multi objective penalty function which also permits a simultaneous solution integrated boost situations considering two white volumes simultaneously.

  20. El Sistema inspirerede projekter

    Holst, Finn; Chemi, Tatiana

    Rapporten er resultat af pilotprojektet ”Forundersøgelse El Sistema DK” gennemført af Ph.D. Finn Holst (DPU, Aarhus Universitet) og Ph.D. Tatiana Chemi (Aalborg Universitet) i 2015. I rapporten indgår desuden bidrag fra Sofie Holm, Sara Fink Søndergaard og Stine Møgelbjerg Johansen. Pilotprojektet...... er gennemført for DMKLs El Sistema-udvalg med støtte fra Statens Kunstfond, Projektstøtteudvalget for Musik....

  1. El Sistema's Open Secrets

    Booth, Eric

    2011-01-01

    In this article, the author talks about Venezuela's national youth orchestra program called El Sistema whose attributes offer a direct challenge to traditional Western music practices. As U.S. classical music--and all "high arts"--struggle to find relevance to more than the small "arts club" percentage of the U.S. populace, El…

  2. El sistema constructivo

    Leser S., Heinz; Gómez Lerou, Luis; Salomone R., Vanessa

    2003-01-01

    Se describe el sistema constructivo de entramado en madera, “plataforma” (platform frame) utilizado preferentemente en las construcciones de varios pisos en el campamento minero de Sewell, Chile./The following is a description of the platform frame used in several stories buildings in the mining settlement Sewell, in Chile.

  3. El sistema constructivo

    Leser S., Heinz

    2003-06-01

    Full Text Available Se describe el sistema constructivo de entramado en madera, “plataforma” (platform frame utilizado preferentemente en las construcciones de varios pisos en el campamento minero de Sewell, Chile./The following is a description of the platform frame used in several stories buildings in the mining settlement Sewell, in Chile.

  4. experiencias en el sistema

    B. Fernández Manjón

    2005-01-01

    Full Text Available En este trabajo se presenta la experiencia de aplicación e implementación del modelo de objetos educativos en el sistema . Se describe una visión práctica de la aplicación de las tecnologías de marcado tanto en la estructuración de los cursos como en el desarrollo de contenidos que pueden ser adaptados al usuario. En se han seguido las especificaciones de IMS, desarrollándose un soporte completo del empaquetamiento de cursos (content packaging reflejado en un sistema de autoría de cursos y una herramienta de importación. Además se ha particularizado un perfil específico de cursos y de objetos educativos que permiten su adaptación al usuario.

  5. Sistemas integrados con Arduino

    EL YAKOUTI, MOHAMMED

    2017-01-01

    Design of a robot prototype remotely controllable from Bluetooth using Arduino. Control and testing of sensors and events interacting with Arduino and Bluetooth. Diseño de un prototipo de robot controlable remotamente con Bluetooth utilizando Arduino. Control y verificación de los sensores y eventos que interactúan mediante el Arduino y el Bluetooth. El Yakouti, M. (2017). Sistemas integrados con Arduino. http://hdl.handle.net/10251/89274. TFGM

  6. SISTEMA DE MONITORAMENTO AUTOMATIZADO

    Raiane viana Souza

    2016-11-01

    Full Text Available Atualmente existe uma grande necessidade de ter sistemas que auxiliem no monitoramento de ambientes, por exemplo: uma residência; permitindo assim que o usuário possa controlar e ter acesso a tudo que acontece quando o mesmo estiver ausente. Este projeto propõe realizar o desenvolvimento de um sistema de monitoramento automatizado, cujo objetivo é identificar a presença de pessoas e capturar temperaturas de um ambiente. O sistema é composto por um microcontrolador Arduíno, no qual estará acoplado: uma Webcam, sensores de presença e temperatura e um módulo wifi, que possibilitará o envio dos dados capturados ao servidor web. No protótipo desenvolvido foram implantados todos os recursos definidos com base nos requisitos do usuário, dentre os quais podem-se destacar: permitir detectar a presença de pessoas em ambiente, capturar imagens, capturar temperatura em um intervalo de tempo específico e enviar todos os dados para o servidor; permitir que o usuário visualize as informações capturadas através de um site; gerar relatórios e gráficos com as informações capturadas e permitir que o usuário exporte as informações em formato de arquivo.

  7. Linear algebra

    Shilov, Georgi E

    1977-01-01

    Covers determinants, linear spaces, systems of linear equations, linear functions of a vector argument, coordinate transformations, the canonical form of the matrix of a linear operator, bilinear and quadratic forms, Euclidean spaces, unitary spaces, quadratic forms in Euclidean and unitary spaces, finite-dimensional space. Problems with hints and answers.

  8. Sistemas Silvipastoris Silvipastoral Systems

    Fernando Salgado Bernardino

    2010-02-01

    Full Text Available

    Apesar das pesquisas com sistemas silvipastoris terem sido iniciadas no final da década de 1970, as informações geradas até hoje não são em grande número. As vantagens advindas de um sistema silvipastoril são inúmeras e devidamente reconhecidas. Pelo fato de ser uma técnica de uso da terra capaz de recuperar ecossistemas alterados pelo mau manejo, estes sistemas, pela integração de atividades agrícolas, pecuárias e silviculturais, passam a representar uma tecnologia que confere maior sustentabilidade que os sistemas tradicionais, nos quais os monocultivos são predominantes. Nos últimos anos, instituições de ensino, pesquisa e extensão do País têm se voltado para o desenvolvimento de tais sistemas. O governo de Minas Gerais, por meio de sua Secretaria de Estado de Agricultura e de órgãos vinculados, vem promovendo a condução de modelos agrossilvipastoris num processo integrado de ocupação do solo, denominado lavoura-pecuária-silvicultura. Apesar dos grandes avanços no conhecimento de culturas anuais e dos componentes arbóreos, principalmente o eucalipto, e de gramíneas forrageiras tolerantes à diminuição da intensidade luminosa, ainda é necessário se comnhecer melhor o manejo do sub-bosque sob os efeitos do pastejo.

     

    doi: 10.4336/2009.pfb.60.77

    Although researches related to silvopastoral systems have been initiated many years ago in Brazil, there are few informations generated until now. The advantages from a silvopastoral system are inumerous and well recognized. By the fact of being a technique of land using capable of recovering several disturbed ecosystems, the silvopastoral systems by the integration of agricultural, cattle, and silvicultural activities represent a technology that can achieve higher sustainability than the traditional systems as the monocultures. Today, research centers in Brazil dedicate great attention to agrossilvopastoral systems. The government of Minas Gerais

  9. Sistema de Reconocimiento de Caracteres Orientado a Sistemas Android

    Segura Morales, Oriol; Universitat Autònoma de Barcelona. Escola d'Enginyeria

    2014-01-01

    Este proyecto trata sobre un sistema de reconocimiento de caracteres que se implementa para sistemas Android en forma de aplicación para móvil y Tablet. La aplicación está orientada para que los niños aprendan a escribir de una forma más amena. El sistema utiliza el patrón de diseño Modelo-Vista-Controlador para separar la lógica del sistema de la interfaz visual. En la interfaz, el sistema pide que se escriba un carácter utilizando la pantalla táctil y una vez el usuario lo ha escrito el sis...

  10. DOS SISTEMAS AMBIENTAIS AO SISTEMA FLUVIAL – UMA REVISÃO DE CONCEITOS

    Jonas Otaviano Praça de Souza

    2013-10-01

    Full Text Available Tentando consolidar as noções de totalidade, a geografia física passa a utilizar a noção de sistemas dinâmicos, não lineares e de comportamento caótico. Deste modo, a abordagem sistêmica/complexa apresenta-se como meio de compreensão do mundo natural, assim possibilitando a previsão de mudanças, avaliação dos sistemas ambientais, distúrbios e limiares do sistema. Nota-se, assim, a importância dos estudos processuais para o gerenciamento de recursos hídricos, tornando imprescindíveis estudos sistêmicos que analisem os diversos elementos importantes para a análise dos recursos hídricos, dentre eles as questões processuais. Deste modo, a necessidade de se trabalhar o gerenciamento integrado de recursos hídricos, enquadrado na perspectiva sistêmica, solidificou a bacia hidrográfica e/ou bacia de drenagem como recorte espacial sistêmico. Delimitada a área pode-se compreender a bacia hidrográfica como um Sistema Fluvial, conceituado por Schumm (1977, que é analisado a partir da zona fonte de sedimentos, da rede de transporte e dos sítios de deposição. Esses elementos não são espacialmente excludentes, interagindo entre si, além de apresentar escalas diferenciadas. Para o estudo do sistema fluvial é necessário levar em consideração quatro conceitos: uniformidade dos processos, limiares de mudança, evolução da paisagem e respostas complexas.

  11. Sistema seguidor solar microcontrolado

    Daiane Maria Mendes Duarte

    2015-12-01

    Full Text Available A demanda de energia elétrica é cada vez maior devido ao grande crescimento da população e do novo estilo de vida adotado pela sociedade moderna, cada vez mais industrializada. Nesse sentido, o consumo de energia vem apresentando um crescimento acelerado. Concomitantemente, a sociedade se movimenta no sentido de se conscientizar das alterações ocasionadas na natureza, e, assim, surge a necessidade de novos meios de geração de energia, menos impactantes ao meio ambiente, denominadas energias renováveis. Este artigo vem apresentar um sistema seguidor solar microcontrolado, que possibilita uma maior captação de energia em placas solares, pois as posiciona sempre com sua face voltada para o sol. O sistema de controle é baseado nas equações matemáticas cujos resultados são as posições do sol num dado dia e em uma dada hora. Estas coordenadas são calculadas e resultam no deslocamento da célula fotovoltaica por meio de um motor.

  12. Concept of ecological corridors and agroforestal systems applied for the implementation of PETROBRAS punctual and linear projects: case study of COMPERJ (Rio de Janeiro Petrochemical Complex); Conceito de corredores ecologicos e sistemas agroflorestais aplicados a implantacao de empreendimentos pontuais e lineares em ambito PETROBRAS: estudo de caso do COMPERJ (Complexo Petroquimico do Rio de Janeiro)

    Secron, Marcelo B; Mesquita, Ivan D; Soares, Luiz Felipe R; Almeida, Ronaldo Bento G. de; Fernandes, Renato; Dellamea, Giovani S [PETROBRAS, Rio de Janeiro, RJ (Brazil); Nunes, Rodrigo T; Pereira, Junior, Edson Rodrigues [SEEBLA, Servicos de Engenharia Emilio Baumgart Ltda., Rio de Janeiro, RJ (Brazil)

    2008-07-01

    The land use and human occupation realized with an indiscriminate form across many parts of the world, including Brazil, have been causing destruction of great amount of forest mass and green areas. These actions results an isolation of a forest reminder fragment, and in such case, along the time, these fragments become weak and debilitated, characterizing general biodiversity loss or its extinction, in a worse case. This study presents basic concepts of ecological corridors and agroforestal systems, showing the case study that will be implemented in COMPERJ (Rio de Janeiro Petrochemical Complex), pointing the aspects that can be applied for PETROBRAS to offset impacts (biodiversity offsets concept) of punctual and linear projects. (author)

  13. Software del sistema osteomioarticular

    Dianelys León Medina

    2015-06-01

    Full Text Available Introducción: la aplicación en la enseñanza de las Tecnologías de la Informática y las Comunicaciones, es una de las líneas que ha trazado el sistema de salud cubano en estudiantes de las ciencias médicas. La anatomía es una de las ciencias que integra la disciplina de Morfofisiología y para facilitar su comprensión resulta necesario el empleo de recursos y estrategias, entre los que puede figurar un software educativo. Objetivo: diseñar un software sobre la anatomía del sistema osteomioarticular de cabeza y cuello para los estudiantes de primer año de la carrera de Estomatología de Pinar del Río. Material y método: se realizó un estudio cualitativo. Para obtener los resultados se utilizó el método materialista dialéctico. Para la dialéctica del desarrollo del proceso estudiado se utilizaron los métodos teóricos, empíricos, el estudio profundo del tema, tipo de plataforma a utilizar y criterios de los especialistas. Para su procesamiento se utilizaron técnicas estadísticas descriptivas e inferenciales no paramétricas. Resultados: debido a la necesidad de fortalecer en los estudiantes las habilidades en la utilización de las tecnologías de la informática y las comunicaciones, se elaboró el software de la anatomía del sistema osteomioarticular de cabeza y cuello "Aprendiendo anatomía" mediante imágenes, videos y textos. Conclusiones: el software constituye un aporte al proceso enseñanza aprendizaje, el cual facilita el trabajo independiente y autopreparación mediante la interactividad con el contenido, retroalimentación y evaluación utilizando medios de enseñanza modernos, lo cual tributa al modo de actuación del futuro egresado.

  14. El Sistema Universitario Ecuatoriano

    Lilian Molina

    2016-12-01

    Full Text Available El presente trabajo muestra al sistema universitario ecuatoriano, con el fin de ayudar a entender el inicio de sus reformas en relación con la nueva Constitución y Ley Orgánica de Educación Superior, la importancia de la gratuidad en este nuevo escenario, así como también las nuevas tipologías y orden constitucional de creación de nuevas universidades para promover la investigación científica. Abstract  The present work shows the Ecuadorian university system, in order to help understand the beginning of its reforms in relation to the new Constitution and Organic Law of Higher Education, the importance of gratuitousness in this new scenario, as well as the new typologies And constitutional order of creation of new universities to promote scientific research.

  15. Linear gate

    Suwono.

    1978-01-01

    A linear gate providing a variable gate duration from 0,40μsec to 4μsec was developed. The electronic circuity consists of a linear circuit and an enable circuit. The input signal can be either unipolar or bipolar. If the input signal is bipolar, the negative portion will be filtered. The operation of the linear gate is controlled by the application of a positive enable pulse. (author)

  16. Linear Accelerators

    Vretenar, M

    2014-01-01

    The main features of radio-frequency linear accelerators are introduced, reviewing the different types of accelerating structures and presenting the main characteristics aspects of linac beam dynamics

  17. Um modelo baseado em programação linear e programação de metas para análise de um sistema de produção e distribuição de suco concentrado congelado de laranja A model based on linear programming and goal programming to analyze a frozen concentrated orange juice production and distribution system

    José Renato Munhoz

    2001-08-01

    Full Text Available Neste trabalho apresenta-se um modelo baseado em programação linear e programação de metas para apoiar decisões no processo de mistura e na distribuição de suco concentrado congelado de laranja. Explora-se a importância das decisões do processo de mistura para a análise da logística de distribuição do suco de laranja, além das decisões de transporte e armazenagem. O modelo utiliza conceitos conhecidos da literatura de problemas de mistura e planejamento da produção com múltiplos produtos, estágios e períodos, e foi resolvido por meio da linguagem de modelagem GAMS (General Algebraic Modeling System. Um estudo de caso foi realizado numa empresa de suco de laranja localizada no interior do estado de São Paulo, e os resultados preliminares obtidos são promissores.This work proposes a model based on linear programming and goal programming to support decisions in the blending process and distribution of frozen concentrated orange juice. This study explores the importance of blending decisions for the logistic analysis of the orange juice distribution, besides transportation and storage decisions. The model utilizes well-known concepts from the literature of blending problems and multistage, multiproduct and multiperiod production planning problems, and it was solved using the GAMS (General Algebraic Modeling System programming language. A case study was developed in an orange juice industry located in São Paulo State, and the preliminary results are promising.

  18. Sistema Automatizado de Emailing Marketing

    Martínez López, Javier

    2010-01-01

    Projecte final de carrera realitzat en col.laboració amb E-xpertel S.A El presente proyecto describe el diseño e implementación de un sistema de automatización de campañas de marketing a través de email hacia clientes y/o clientes potenciales. Este sistema tiene como objetivos principales adquirir nuevos clientes y conseguir la delización de los mismos. El sistema se complementa con una plataforma CRM (Customer Relationship Management) para el mantenimiento de datos de empresa...

  19. Linearization Method and Linear Complexity

    Tanaka, Hidema

    We focus on the relationship between the linearization method and linear complexity and show that the linearization method is another effective technique for calculating linear complexity. We analyze its effectiveness by comparing with the logic circuit method. We compare the relevant conditions and necessary computational cost with those of the Berlekamp-Massey algorithm and the Games-Chan algorithm. The significant property of a linearization method is that it needs no output sequence from a pseudo-random number generator (PRNG) because it calculates linear complexity using the algebraic expression of its algorithm. When a PRNG has n [bit] stages (registers or internal states), the necessary computational cost is smaller than O(2n). On the other hand, the Berlekamp-Massey algorithm needs O(N2) where N(≅2n) denotes period. Since existing methods calculate using the output sequence, an initial value of PRNG influences a resultant value of linear complexity. Therefore, a linear complexity is generally given as an estimate value. On the other hand, a linearization method calculates from an algorithm of PRNG, it can determine the lower bound of linear complexity.

  20. Linear algebra

    Said-Houari, Belkacem

    2017-01-01

    This self-contained, clearly written textbook on linear algebra is easily accessible for students. It begins with the simple linear equation and generalizes several notions from this equation for the system of linear equations and introduces the main ideas using matrices. It then offers a detailed chapter on determinants and introduces the main ideas with detailed proofs. The third chapter introduces the Euclidean spaces using very simple geometric ideas and discusses various major inequalities and identities. These ideas offer a solid basis for understanding general Hilbert spaces in functional analysis. The following two chapters address general vector spaces, including some rigorous proofs to all the main results, and linear transformation: areas that are ignored or are poorly explained in many textbooks. Chapter 6 introduces the idea of matrices using linear transformation, which is easier to understand than the usual theory of matrices approach. The final two chapters are more advanced, introducing t...

  1. Linear algebra

    Stoll, R R

    1968-01-01

    Linear Algebra is intended to be used as a text for a one-semester course in linear algebra at the undergraduate level. The treatment of the subject will be both useful to students of mathematics and those interested primarily in applications of the theory. The major prerequisite for mastering the material is the readiness of the student to reason abstractly. Specifically, this calls for an understanding of the fact that axioms are assumptions and that theorems are logical consequences of one or more axioms. Familiarity with calculus and linear differential equations is required for understand

  2. Linear programming

    Solow, Daniel

    2014-01-01

    This text covers the basic theory and computation for a first course in linear programming, including substantial material on mathematical proof techniques and sophisticated computation methods. Includes Appendix on using Excel. 1984 edition.

  3. Linear algebra

    Liesen, Jörg

    2015-01-01

    This self-contained textbook takes a matrix-oriented approach to linear algebra and presents a complete theory, including all details and proofs, culminating in the Jordan canonical form and its proof. Throughout the development, the applicability of the results is highlighted. Additionally, the book presents special topics from applied linear algebra including matrix functions, the singular value decomposition, the Kronecker product and linear matrix equations. The matrix-oriented approach to linear algebra leads to a better intuition and a deeper understanding of the abstract concepts, and therefore simplifies their use in real world applications. Some of these applications are presented in detailed examples. In several ‘MATLAB-Minutes’ students can comprehend the concepts and results using computational experiments. Necessary basics for the use of MATLAB are presented in a short introduction. Students can also actively work with the material and practice their mathematical skills in more than 300 exerc...

  4. Linear algebra

    Berberian, Sterling K

    2014-01-01

    Introductory treatment covers basic theory of vector spaces and linear maps - dimension, determinants, eigenvalues, and eigenvectors - plus more advanced topics such as the study of canonical forms for matrices. 1992 edition.

  5. Linear Models

    Searle, Shayle R

    2012-01-01

    This 1971 classic on linear models is once again available--as a Wiley Classics Library Edition. It features material that can be understood by any statistician who understands matrix algebra and basic statistical methods.

  6. LINEAR ACCELERATOR

    Christofilos, N.C.; Polk, I.J.

    1959-02-17

    Improvements in linear particle accelerators are described. A drift tube system for a linear ion accelerator reduces gap capacity between adjacent drift tube ends. This is accomplished by reducing the ratio of the diameter of the drift tube to the diameter of the resonant cavity. Concentration of magnetic field intensity at the longitudinal midpoint of the external sunface of each drift tube is reduced by increasing the external drift tube diameter at the longitudinal center region.

  7. Blastomicose do sistema nervoso

    Horácio M. Canelas

    1951-09-01

    Full Text Available Os autores chamam a atenção sôbre os erros de diagnóstico nos casos de neuroblastomicose, seja nas formas meningoencefálicas, seja nas tumorais. São focalizadas a paracoccidioidose e a criptococose. Depois de caracterizarem clìnicamente a paracoccidioidose, acentuam a raridade das formas nervosas (1,2% dos casos dessa micose autopsiados no Departamento de Anatomia Patológica da Faculdade de Medicina da Universidade de São Paulo. Pela revisão da literatura foi verificado haver apenas 12 casos registrados. 0 caso de Casiello e Klass é o único em que o diagnóstico foi feito em vida; os demais, ou constituem achado de necropsia, ou foram inesperadamente revelados pelo exame histopatológico realizado após intervenções cirúrgicas. Os autores registram 2 casos de paracoccidioidose do sistema nervoso. No primeiro, tratava-se de meningomielorra-diculite crônica, sendo o parasito identificado no escarro; o segundo era portador de síndrome de compressão medular, cuja patogenia é discutida pelos autores, tendo sido a etiologia paracoccidióidica comprovada pelo exame da polpa e biópsia ganglionares. Considerações clínicas sôbre a criptococose precedem o relato de um caso de meningoencefalomielite subaguda, no qual fôra feito em vida o diagnóstico de paracoccidioidose, pelo exame micológico do liqüido cefalorraqueano; êste paciente, embora medicado com doses maciças de sulfa e tiossemicarbarsona, veio a falecer, tendo o exame anátomo-patológico revelado tratar-se, na realidade, de lesões nervosas produzidas pelo Crypíococcus neo-formans. Nos três casos era incisivo o caráter neurocirúrgico da sintomatologia. Entretanto, ante o diagnóstico de paracoccidioidose, foi instituído tratamento pelas sulfas, vacina específica e tiossemicarbarsona. Os resultados foram excelentes no caso 2, em que a terapêutica pôde ser instituída mais precocemente; melhoras também foram obtidas no caso 1. No caso 3, foram verificadas

  8. Micoses do sistema nervoso

    Carlos da Silva Lacaz

    1947-03-01

    Full Text Available As micoses do sistema nervoso central não têm merecido atenção cuidadosa dos neurologistas. Elas afetam o neuraxe em diferente percentagem: a granulomatose criptocóccica (torulose é a mais freqüente, seguindo-se a actinomicose; a granulomatose paracoccidióidica só excepcionalmente determina lesões meningoencefálicas. Do ponto de vista clínico, as neuromicoses podem ser divididas em duas formas: tumorais encefalomedulares e meningíticas. Estas predominam sobre as tumorais, das quais são mais freqüentes as de localização encefálica. Não são raros os quadros mistos, meningoencetálicos. As formas tumorals encefálicas abrangem vários tipos anátomo-patológicos - abscesso, granuloma, nódulos e cistos - sendo mais comuns os dois primeiros, todos êles produzindo o quadro clinico da síndrome hipertensiva intracraniana. As formas meningomedulares, em geral, são secundárias às lesões ósseas vertebrais, sendo a actinomicose, por ser a mais osteófila, a micose que mais freqüentemente atinge a medula. Nestes casos, o quadro clínico da síndrome compressiva é o mais comum. As meninges participam do processo fúngico, na maior parte dos casos; as manifestações clínicas variam desde o simples meningismo, até as meningites purulentas e meningoencefalites graves, havendo a possibilidade de se formarem aracnoidites císticas, ependimites e bloqueios ventriculares, do aqueduto ou mesmo do canal raquidiano. O diagnóstico das micoses do sistema nervoso central é comumente um "achado de autópsia". Somente a verificação do cogumelo no líquor e o seu isolamento permitem um diagnóstico seguro. Outros dados liquóricos, quando bem interpretados com os achados clínicos e neurológicos, orientam o analista na pesquisa do agente fúngico. O quadro anátomo-patológico nada tem de caraterístico, a não ser a presença do agente parasitário e só o seu encontro firma o diagnóstico. Examinamos 25 casos de granulomatose

  9. Linear regression

    Olive, David J

    2017-01-01

    This text covers both multiple linear regression and some experimental design models. The text uses the response plot to visualize the model and to detect outliers, does not assume that the error distribution has a known parametric distribution, develops prediction intervals that work when the error distribution is unknown, suggests bootstrap hypothesis tests that may be useful for inference after variable selection, and develops prediction regions and large sample theory for the multivariate linear regression model that has m response variables. A relationship between multivariate prediction regions and confidence regions provides a simple way to bootstrap confidence regions. These confidence regions often provide a practical method for testing hypotheses. There is also a chapter on generalized linear models and generalized additive models. There are many R functions to produce response and residual plots, to simulate prediction intervals and hypothesis tests, to detect outliers, and to choose response trans...

  10. Linear Colliders

    Alcaraz, J.

    2001-01-01

    After several years of study e''+ e''- linear colliders in the TeV range have emerged as the major and optimal high-energy physics projects for the post-LHC era. These notes summarize the present status form the main accelerator and detector features to their physics potential. The LHC era. These notes summarize the present status, from the main accelerator and detector features to their physics potential. The LHC is expected to provide first discoveries in the new energy domain, whereas an e''+ e''- linear collider in the 500 GeV-1 TeV will be able to complement it to an unprecedented level of precision in any possible areas: Higgs, signals beyond the SM and electroweak measurements. It is evident that the Linear Collider program will constitute a major step in the understanding of the nature of the new physics beyond the Standard Model. (Author) 22 refs

  11. Linear algebra

    Edwards, Harold M

    1995-01-01

    In his new undergraduate textbook, Harold M Edwards proposes a radically new and thoroughly algorithmic approach to linear algebra Originally inspired by the constructive philosophy of mathematics championed in the 19th century by Leopold Kronecker, the approach is well suited to students in the computer-dominated late 20th century Each proof is an algorithm described in English that can be translated into the computer language the class is using and put to work solving problems and generating new examples, making the study of linear algebra a truly interactive experience Designed for a one-semester course, this text adopts an algorithmic approach to linear algebra giving the student many examples to work through and copious exercises to test their skills and extend their knowledge of the subject Students at all levels will find much interactive instruction in this text while teachers will find stimulating examples and methods of approach to the subject

  12. Analise de alternativas de expansão de capacidade dos sistemas urbanos de abastecimento de agua em Santa Catarina

    Jungles, Antonio Edesio

    1994-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnologico Para analisar a expansão de capacidade dos sistemas de abastecimento de água foi desenvolvido uma metodologia que envolveu os custos de construção da cada componente que configura o sistema de abastecimento de água e os de operação divididos em despesas com pessoal, energia elétrica, materiais de tratamento e outras despesas do sistema. Análises de regressão múltipla linear e não linear foram utilizadas para o aj...

  13. Sistemas de tiempo real y sistemas distribuidos de tiempo real

    Pesado, Patricia Mabel; Ramón, Hugo Dionisio; Boracchia, Marcos; Pasini, Ariel C.; De Vito, María Cecilia; Osella Massa, Germán Leandro; Estrebou, César Armando

    2006-01-01

    El proyecto de investigación y desarrollo en Sistemas de Software Distribuido, abarca aspectos que van desde los fundamentos del desarrollo (Técnicas de Ingeniería de Requerimientos, Metodologías de Gestión y Desarrollo de Proyectos, Técnicas de Planificación, Métricas, Normas de Calidad, Web-Systems) hasta la concepción de aplicaciones específicas orientadas a los procesos industriales (Sistemas de Planeamiento de Producción, Control Industrial en tiempo real), procesos de E-government (Voto...

  14. Linear programming

    Karloff, Howard

    1991-01-01

    To this reviewer’s knowledge, this is the first book accessible to the upper division undergraduate or beginning graduate student that surveys linear programming from the Simplex Method…via the Ellipsoid algorithm to Karmarkar’s algorithm. Moreover, its point of view is algorithmic and thus it provides both a history and a case history of work in complexity theory. The presentation is admirable; Karloff's style is informal (even humorous at times) without sacrificing anything necessary for understanding. Diagrams (including horizontal brackets that group terms) aid in providing clarity. The end-of-chapter notes are helpful...Recommended highly for acquisition, since it is not only a textbook, but can also be used for independent reading and study. —Choice Reviews The reader will be well served by reading the monograph from cover to cover. The author succeeds in providing a concise, readable, understandable introduction to modern linear programming. —Mathematics of Computing This is a textbook intend...

  15. Thoughts on Seeing "El Sistema"

    Booth, Eric

    2009-01-01

    The FESNOJIV (the Spanish acronym for the State Foundation for the National System of Youth and Children's Orchestras), more commonly known as "El Sistema," teaches 300,000 of Venezuela's poorest children in the nationwide music learning program. Many begin attending the "nucleo" as early as age two or three, and the vast…

  16. Knowledge Exchange with Sistema Scotland

    Allan, Julie; Moran, Nikki; Duffy, Celia; Loening, Gica

    2010-01-01

    This paper reports on a knowledge exchange project, funded by the Scottish Funding Council and undertaken by a group of researchers from three higher education institutions in Scotland and the project partner, Sistema Scotland. This newly established charity is attempting to implement a major programme of social change, developed in Venezuela,…

  17. Introducción al estudio de los sistemas económicos

    García Nossa, Antonio

    2010-01-01

    Interdependencia de los sistemas; Coexistencia de los sistemas; Sucesión y coexistencia; Sistemas históricos y sistemas geopolíticos; Factores cuantitativos y cualitativos de los sistemas; Principios generales de los sistemas.

  18. Reduction of Linear Programming to Linear Approximation

    Vaserstein, Leonid N.

    2006-01-01

    It is well known that every Chebyshev linear approximation problem can be reduced to a linear program. In this paper we show that conversely every linear program can be reduced to a Chebyshev linear approximation problem.

  19. Sistema Kaizen en la administracion

    Gallegos, H.

    2007-01-01

    Full Text Available En este artículo presentaremos la importancia que tiene el área de administración como factor de reducción de costos para la empresa aplicando el sistema kaizen. Analizaremos en forma general la administración de las empresas, enfocándonos en las áreas de oportunidad que pueden existir, así como la posible solución a esto, utilizando el sistema kaizen, obteniendo como resultado una reducción de costos, tiempos o mejoras en los procesos administrativos. También se anexa un caso practico en el cual se muestra como aplicando la metodología kaizen en las actividades administrativas podemos lograr una reducción de tiempos y/o costos todo esto causado por la reingeniería de los procesos.

  20. Sistemas de control en estructuras

    José Luis Ahumada Villafañe

    2010-01-01

    Full Text Available En el diseño estructural, la capacidad de disipación de energía en elementos que conforman los sistemas resistentes a fuerzas dinámicas, como las impartidas por la actividad sísmica y eólica, es suministrada por un minucioso detallado del acero de refuerzo y dimensiones en las secciones transversales de los elementos. Esta práctica es realizada bajo muchas suposiciones que en algunas ocasiones no corresponden a la realidad, y como es de esperarse, producen resultados inexactos y un desconocimiento del desempeño de la estructura. Por lo anterior es riesgoso confiar el 100% de la capacidad estructural a los elementos sobre todo cuando conforman sistemas estructurales diseñados en zonas de amenaza sísmica alta. En este artículo se presentan los sistemas de control, los cuales son una serie de dispositivos adaptados a las estructuras que absorben gran parte de la energía sísmica y liberan los elementos estructurales en gran porcentaje de la acción sísmica, logrando disminuir en ellas las solicitaciones (fuerzas internas y las respuestas (derivas con el objetivo de conseguir un buen desempeño, limitar el daño y abaratar los costos de reparación de fallas localizadas. Los sistemas de control que se analizarán en el presente artículo se dividen en control pasivo, control activo, control semiactivo y control híbrido.

  1. El sistema reticulo-endotelial

    Carlos J. Cuartas L.

    1935-01-01

    multicelulares de organización bastante complicada, necesitan de mecanismos biológicos diferenciados para su defensa contra los agentes endógenos y exógenos, es asimismo razonable admitir en los grupos zoológicos inferiores, la existencia de constituyentes mesenquimáticos, que indican "una mayor amplitud para los límites que alcanza la representación del sistema dentro de la filogénesis".

  2. linear-quadratic-linear model

    Tanwiwat Jaikuna

    2017-02-01

    Full Text Available Purpose: To develop an in-house software program that is able to calculate and generate the biological dose distribution and biological dose volume histogram by physical dose conversion using the linear-quadratic-linear (LQL model. Material and methods : The Isobio software was developed using MATLAB version 2014b to calculate and generate the biological dose distribution and biological dose volume histograms. The physical dose from each voxel in treatment planning was extracted through Computational Environment for Radiotherapy Research (CERR, and the accuracy was verified by the differentiation between the dose volume histogram from CERR and the treatment planning system. An equivalent dose in 2 Gy fraction (EQD2 was calculated using biological effective dose (BED based on the LQL model. The software calculation and the manual calculation were compared for EQD2 verification with pair t-test statistical analysis using IBM SPSS Statistics version 22 (64-bit. Results: Two and three-dimensional biological dose distribution and biological dose volume histogram were displayed correctly by the Isobio software. Different physical doses were found between CERR and treatment planning system (TPS in Oncentra, with 3.33% in high-risk clinical target volume (HR-CTV determined by D90%, 0.56% in the bladder, 1.74% in the rectum when determined by D2cc, and less than 1% in Pinnacle. The difference in the EQD2 between the software calculation and the manual calculation was not significantly different with 0.00% at p-values 0.820, 0.095, and 0.593 for external beam radiation therapy (EBRT and 0.240, 0.320, and 0.849 for brachytherapy (BT in HR-CTV, bladder, and rectum, respectively. Conclusions : The Isobio software is a feasible tool to generate the biological dose distribution and biological dose volume histogram for treatment plan evaluation in both EBRT and BT.

  3. Reflexiones sobre los sistemas silvopastoriles

    R. O Russo

    Full Text Available El objetivo de este análisis es reflexionar acerca de modelos integrados de producción ganadera familiar y extensiva, más estables y sustentables, en los que se integre el componente leñoso, que contribuye a la reducción de gases con efecto invernadero y favorece la mitigación del cambio climático. Para ello se hizo una revisión de conceptos referentes a la integración de la actividad forestal en la ganadería, como alternativa viable de sistema de producción. Se parte del criterio de que los sistemas silvopastoriles (SSP, dentro de los agroforestales, son agroecosistemas en los que se asocia un componente arbóreo con uno herbáceo (pasturas naturales o mejoradas y otro pecuario (ganado en un mismo sitio, donde existen interacciones biológicas entre estos y se maximiza el uso de la tierra. También se describe cómo se agrupan los SSP; sus oportunidades desde los puntos de vista económico, productivo, social y ambiental; y los efectos de la interacción entre sus componentes. Este análisis permite plantear que los SSP son producto de la relación entre la biología, la sociedad y la cultura, y en ellos existe una enorme diversidad; asimismo, permiten la reconversión de la ganadería extensiva de muy baja productividad en sistemas más productivos y sostenibles en el tiempo, así como la rehabilitación de las áreas degradadas por ese tipo de ganadería, por la deforestación y por el agotamiento de los suelos.

  4. Neurocitoma no sistema nervoso central

    José Torquato Severo

    1973-03-01

    Full Text Available É relatado o caso de uma paciente com 6 anos de idade, hospitalizada com síndrome de hipertensão intracraniana. Após o exame neuro-radiológico que evidenciou processo expansivo frontal direito, a paciente foi submetida à cirurgia, durante a qual ocorreu o óbito. O exame histo-patológico do material retirado durante o ato operatório, permitiu o diagnóstico de neurocitoma, tumor raro no sistema nervoso central.

  5. Sistema prisional e direitos humanos

    Mendes, André Pacheco Teixeira

    2015-01-01

    O volume 4 da Série Clínicas dos Cadernos FGV DIREITO RIO traz quatro trabalhos originais relacionados ao tema do Sistema Prisional e Direitos Humanos. A obra contempla pareceres jurídicos sobre violações aos direitos dos presos nas unidades prisionais do estado do Rio de Janeiro, tendo por objeto: (i) emprego ilegal de laxante em custodiados e visitantes suspeitos de carregarem drogas; (ii) falta de água própria para o consumo humano; (iii) restrição ao banho de sol; e (iv) condições inadequ...

  6. Sistema de videovigilancia utilizando recursos de LAN

    Fernández García, David

    2007-01-01

    El objetivo principal de este proyecto es realizar un sistema de información que sea capaz de efectuar video vigilancia. Este sistema de información está formado por un servidor y un número, en principio, limitado de clientes

  7. Quantization Procedures; Sistemas de cuantificacion

    Cabrera, J. A.; Martin, R.

    1976-07-01

    We present in this work a review of the conventional quantization procedure, the proposed by I.E. Segal and a new quantization procedure similar to this one for use in non linear problems. We apply this quantization procedures to different potentials and we obtain the appropriate equations of motion. It is shown that for the linear case the three procedures exposed are equivalent but for the non linear cases we obtain different equations of motion and different energy spectra. (Author) 16 refs.

  8. Linear Algebra and Smarandache Linear Algebra

    Vasantha, Kandasamy

    2003-01-01

    The present book, on Smarandache linear algebra, not only studies the Smarandache analogues of linear algebra and its applications, it also aims to bridge the need for new research topics pertaining to linear algebra, purely in the algebraic sense. We have introduced Smarandache semilinear algebra, Smarandache bilinear algebra and Smarandache anti-linear algebra and their fuzzy equivalents. Moreover, in this book, we have brought out the study of linear algebra and vector spaces over finite p...

  9. El sistema reticulo-endotelial

    Carlos M. Pava

    1936-05-01

    Full Text Available El lector aficionado a los estudios histológicos que hace unos veinte años hubiese hojeado algún tratado nuevo sobre la materia, habría encontrado el término de "Sistema retículo-endotelial", sin duda extraño y desconocido para él, porque solamente entonces empezó a figurar no sólo como tal, sino principalmente como la expresión de una nueva agrupación de tejidos cuya morfología era semejante en líneas generales, y cuyo funcionamiento, a pesar de estar diseminado por todo el organismo, es de una precisión e igualdad admirables.

  10. Immanuel Wallerstein e o moderno sistema mundial

    José Jobson de Andrade Arruda

    1983-12-01

    Full Text Available (primeiro parágrafo do texto Immanuel Wallerstein é diretor do Centro Fernand Braudel para o Estudo de Economias, Sistemas Históricos e Civilizacionais (Binghamton, N.Y. e editor da revista trimestral Review. Seu projeto mais amplo é a busca dos elementos determinantes do sistema mundial moderno. Para tanto, dividiu o seu trabalho em quatro partes principais, às quais con-sidera as quatro épocas fundamentais apresentadas pelo dito sistema até hoje. O primeiro volume, objeto desta resenha crítica, cobre o período de 1450 a 1640, correspondendo ao estudo das origens e condições primitivas do sistema mundial até então exclusivamente um sistema europeu. O segundo volume, já publicado, ocupar-se-ia da consolidação do sis-tema entre 1640 e 1815. O terceiro volume, referente ao período de 1815 a 1917, estará centrado na recriação do sistema decorrente das vertiginosas transformações resultantes do dinamismo tecnológico e do avanço do industrialismo no século XIX. O quarto volume cuidará da consolidação da economia — mundo capitalista, a partir de 1917 até a atualidade, e das tensões "revolucionárias" particulares que esta conso lidação tem provocado.

  11. El sistema deportivo. Amenazas y oportunidades

    Javier Olivera Betrán

    2006-06-01

    Full Text Available Aplicando la teoría de sistemas de Ludwig von Bertalanffy, el deporte es un sistema. En un sistema se da un conjunto de unidades interrelacionadas de tal manera que el comportamiento de cada parte depende del estado de todas las otras, pues todas se encuentran en una estructura que las interconecta. En el enfoque sistémico, el concepto tradicional de energía es reemplazado por el de información, y el de causa-efecto por el de estructura y realimentación. El deporte es una realidad social total, por lo que participa de manera implícita y/o explícita en los procesos humanos más diversos a través de los distintos procedimientos que corresponden a nuestra organización sociocultural. El deporte se configura en estructuras de alta complejidad, las cuales están constituidas por sistemas de sistemas cuya comprensión y estudio representan un formidable reto. El estudio del deporte como sistema debe efectuarse desde la lógica estructural y sistémica a través de la cual nos permita indagar con éxito su configuración esencial, sus elementos fundamentales y el proceso de interactuación con los subsistemas que pertenecen al sistema deporte y con los otros del sistema sociocultural dominante. El deporte es un sistema dinámico que interactúa continuamente mediante un doble proceso, intrínseco a través de una constante metamorfosis entre los distintos subsistemas que lo integran y extrínseco por medio de un ajuste permanente con el contexto social, cultural y medioambiental.

  12. Sistema de adquisición de datos para la medición de parámetros radioeléctricos en antenas lineales en la banda de TV de VHF y UHF System of acquisition of information for measurement of radioelectric parameters in linear antennas in the band of VHF and UHF’s television

    María del Pilar Celemín

    2007-06-01

    Full Text Available Este proyecto desarrolla un sistema de adquisición y procesamiento de datos para la medición y ajuste de parámetros radioeléctricos de antenas lineales en las bandas de VHF y UHF. Como señal de prueba se utilizan algunas de las señales de televisión que se encuentran en el espectro radioeléctrico, provenientes de los transmisores que radian señales de canales nacionales. El receptor implementado incluye un sintonizador comercial de televisión que toma como muestra la señal portadora de video. Esta señal es amplificada, filtrada, almacenada y acondicionada, para ser leída por el puerto serial de un computador personal y procesada empleando un programa en Visual Basic, con una interfaz gráfica que permite una interacción amigable con el usuario. Desde acá se interactúa con un microcontrolador que controla el mecanismo de posicionamiento de la antena receptora por medio de una estructura electromecánica, que le permite ejecutar movimientos en dos grados de libertad: en azimut y en elevación. Con esto se logra un sistema capaz de determinar automáticamente el apuntamiento óptimo de la antena de acuerdo al máximo nivel de recepción de señal. Así mismo, se determinan parámetros propios de la antena tales como: el patrón de radiación (tanto en el plano horizontal como vertical, la ganancia directiva de la antena, la ganancia en cada uno de los puntos que conforman el plano principal, y otros parámetros de interés para el análisis de las características reales de antenas lineales.This project develops a data acquisition and processing system for measuring and adjusting lineal-antenna radioelectric parameters in VHF and UHF. Television signals are used as test signal. They can be found in radio electric spectrum, as they come from commercial transmitters that broadcast signals of national channels. The achieved receptor includes a television commercial tuner for obtaining video signal. Later, this signal is conditioning to

  13. Linearly constrained minimax optimization

    Madsen, Kaj; Schjær-Jacobsen, Hans

    1978-01-01

    We present an algorithm for nonlinear minimax optimization subject to linear equality and inequality constraints which requires first order partial derivatives. The algorithm is based on successive linear approximations to the functions defining the problem. The resulting linear subproblems...

  14. Cogeneration Systems; Sistemas de Cogeneracion

    Fernandez M, Manuel F; Huante P, Liborio; Romo M, Cesar A [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2006-07-01

    The present article deals on relevant aspects on the subject of cogeneration within the Mexican territorial limits. In the first place it is presented the role of Mexico in terms of its cogeneration potential, the type of service that has obtained from this predominant modality of cogeneration for self-supplying, the most propitious sectors to develop it, its legislations on the matter, the projects made for the implementation of cogeneration plants, as well as the existing cogeneration schemes for its respective optimization proposals. Without leaving out the analysis on the different types of evaluation on the efficiency of cogeneration systems and the aspects to consider for the election of a generation cycle. [Spanish] El presente articulo trata sobre aspectos relevantes en materia de cogeneracion dentro de los limites territoriales de la nacion mexicana. Se muestra en primer lugar el papel de Mexico en terminos de su potencial de cogeneracion, el tipo de servicio que ha obtenido de esta predominantemente (modalidad de cogeneracion para autoabastecimiento), los sectores mas propicios para desarrollarla, sus legislaciones al respecto, los proyectos realizados para la implementacion de plantas de cogeneracion, asi como los esquemas de cogeneracion existentes con sus respectivas propuestas de optimizacion. Sin dejar de lado el analisis sobre los distintos tipos de evaluacion de la eficiencia de sistemas de cogeneracion y los aspectos a considerar para la eleccion de un ciclo de generacion.

  15. O Brasil na história do futuro ou o Brasil no futuro incerto

    José Flávio Sombra Saraiva

    2011-01-01

    Full Text Available A presente exposição objetiva realizar uma análise acerca dos  novos rumos a serem tomados pela política brasileira. Para isso, contrapor-se-á uma visão otimista com sua análoga negativa.

  16. O Futuro Incerto das Florestas Tropicais The Uncertain Future of Tropical Forests

    Fernando Santos Henriques

    2010-12-01

    Full Text Available As florestas tropicais dão abrigo à maior biodiversidade do planeta, são residência de populações indígenas, fontes de madeira e produtos farmacêuticos, contribuem para regular o clima e prestam uma diversidade de serviços ecológicos vitais - e, contudo, estão ameaçadas de desaparecimento total. As causas desta intensa desflorestação tropical são múltiplas, diferem aos níveis regional e nacional e são simultaneamente de carácter endógeno e exógeno, como é discutido. É também discutida a importância das florestas tropicais para a preservação da diversidade biológica e redução do aquecimento global, pelo sequestro do CO2. Finalmente, são referidas as áreas de desflorestação nalgumas importantes regiões da África, Índia e sudeste asiático e discutidas as suas principais causas.Tropical forests harbour most of the planet biodiversity, are home to indigenous people, sources of timber and pharmaceutical products, contribute to the regulation of the climate and provide an endless number of vital ecological services. However, they are at risk of disappearing. The causes of this rampant tropical deforestation are multiple and differ at the regional and national levels, being both endogenous and exogenous, as is discussed. The importance of tropical forests for preserving biological diversity and reducing global warming by sequestering CO2 are also discussed. Finally, we assess the extent of deforestation and discuss its major drivers in some important regions of Africa, India and southeast Asia.

  17. Foundations of linear and generalized linear models

    Agresti, Alan

    2015-01-01

    A valuable overview of the most important ideas and results in statistical analysis Written by a highly-experienced author, Foundations of Linear and Generalized Linear Models is a clear and comprehensive guide to the key concepts and results of linear statistical models. The book presents a broad, in-depth overview of the most commonly used statistical models by discussing the theory underlying the models, R software applications, and examples with crafted models to elucidate key ideas and promote practical model building. The book begins by illustrating the fundamentals of linear models,

  18. Efeito de dois sistemas de soldagem na alteração dimensional nas ligas de cobalto-cromo verificado por meio de análise por extensometria linear elétrica e resistência à flexão

    Castilho, Anderson Almeida [UNESP

    2009-01-01

    O objetivo neste estudo foi avaliar a alteração dimensional provocada pelos procedimentos de soldagem nas infra-estruturas de próteses fixas impanto-suportadas por meio de análise de extensometria linear elétrica assim como se determinar a resistência flexão de dois tipos de juntas soldadas (Arco-Plasma e Laser) em liga Odontológica Co-Cr. Para tanto, estruturas metálicas foram fundidas pelo método de indução para pilares tipo micro-unit. Para esse estudo, foram investigados três grupos: Grup...

  19. Regulación neuroendocrina del sistema inmune

    Caballero Hernández, Diana; Tamez Guerra, Reyes S.; Rodríguez Padilla, Cristina; Tamez Guerra, Patricia; Weber, Richard J.; Gómez Flores, Ricardo

    2001-01-01

    El sistema inmune recibe señales del sistema nervioso central (cerebro) vía el sistema nervioso autónomo y el sistema endocrino. El sistema inmune, a su vez, envía información al cerebro vía citocinas. Este sistema de retroalimentación es vital para el funcionamiento adecuado del organismo en situaciones normales, y en aquellas en las que la homeostasis se ve perturbada, como en casos de estrés, consumo de drogas (terapéuticas o de abuso), enfermedades infecciosas y...

  20. Sistemas de gestión ambiental normalizados

    Fronti de García, Luisa; Pahlen, Ricardo José María; D’Onofrio, Paula Alejandra

    2004-01-01

    La contabilidad ambiental presupone la existencia de un sistema de gestión ambiental. Dentro del sistema integral de la organización, el sistema de gestión ambiental permite la obtención de información oportuna y segura. Podríamos definir el sistema de gestión ambiental de un ente como el conjunto de medidas destinadas a prevenir el impacto negativo de las actividades del ente sobre el medio ambiente. El sistema de gestión ambiental (SGA) es aquella parte del sistema de gestión total que incl...

  1. ESTUDO DA SELETIVIDADE CAPACIDADE EM SISTEMAS SÓLIDO-GÁS

    A. M. SOUZA

    1997-12-01

    Full Text Available A solubilidade de compostos pesados em fase gasosa contendo um componente supercrítico (equilíbrio sólido-gás foi analisada, adotando-se a equação de estado de Peng-Robinson para representar os sistemas sólido-gás estudados. A modelagem foi aplicada para vários sistemas binários (monossólido/monossolvente e multissólido/multissolvente. Para cada sistema, fez-se a estimação dos parâmetros pertinentes, os parâmetros de interação binária, obtidos por regressão não linear a partir dos dados experimentais de equilíbrio sólido-gás correspondentes. Tendo como base os dados binários, foi realizada uma análise de seletividade/ capacidade de sistemas do tipo 2 sólidos-1solvente, comparando-os com dados experimentais, e fez-se a comparação com os sistemas ternários experimentais.The solubility of heavy compounds in gaseous phase containing a supercritical component (solid-gas equilibrium was analised. It was adopted the state equation of Peng-Robinson, to represent the solid-gas systems considered. The model was applied to several cases ranging from binary systems (mono-solid/mono-solvent to multi-solid/multi-solvent systems. For each system, it was done the estimation of pertinent parameters, the binary interaction parameters, obtained by non-linear regression from experimental data of correspondent solid-gas equilibrium. Using the results obtained from binary systems, predictions of selectivity/capacity for ternary systems like 2 solids-1 solvent were accomplished, and then a comparison with experimental data of ternary systems was achieved.

  2. Contexto General de los Sistemas Agrarios

    Vélez Escobar Norberto

    1989-12-01

    Full Text Available Esta ponencia introdujo y delimitó el campo de trabajo para el panel: Formas o Sistemas de Producción Agraria. En ella se presentó y discutió la definición del concepto de FORMA DE PRODUCCION e igualmente planteó la taxonomía más general o "agrupamientos" de los sistemas de producción agraria en Colombia. Se identificaron cinco grupos de formas, en proceso de estructuración, empresariales, campesinas, de economía natural y experimentales; y a continuación se caracterizó y explicó cada uno de los cinco agrupamientos. La ponencia terminó sustentando la validez del trabajo académico basado en el enfoque de sistemas y presentó la evolución reciente de esta forma de trabajo en la Universidad Nacional, Seccional Medellín.

  3. SCODA para el Desarrollo de Sistemas Multiagente

    Jesús A. Román

    2011-12-01

    Full Text Available El planteamiento de implementar sistemas multiagente de forma que puedan reutilizarse con distintos objetivos, dota a los desarrolladores de una metodología más eficaz en sus fines. Este artículo presenta SCODA, una arquitectura basada en cinco principios: estandaridad, especialización, facilidad de implementación, reutilización y computación distribuida. SCODA pretende facilitar el desarrollo de sistemas multiagente, basándose en el concepto de pequeños grupos de agentes denominados Comunidades Inteligentes Especializadas (CIE. Las CIE cuentan con funcionalidades específicas que permiten llevar a cabo la implementación de sistemas multiagente de forma escalable, dentro del marco de SCODA, pudiendo ser reutilizadas en diversos desarrollos.

  4. Psiconeuroinmunología: Conexiones entre sistema nervioso y sistema inmune

    García López, Luis Joaquín

    2008-09-01

    Full Text Available La psiconeuroinmunología es una nueva parcela de la ciencia que apenas lleva tres décadas, pero que en los últimos años ha sido objeto de una enorme atención por diversos grupos de investigación. El articulo pretende exponer brevemente cómo están organizados los sistemas inmune y neuroendocrino, para después presentar los hallazgos que hasta el momento intentan dar explicación de las relaciones entre ambos con el sistema nervioso, así como las influencias de unos sobre otros, más concretamente expresar la relación entre los tres sistemas responsables de la defensa del organismo y, más ampliamente, de su mantenimiento homeostático. Cuando se trata de amenazas, el sistema nervioso central tiene que decidir qué sistema se pone en marcha, el sistema de estrés como energía para el ataque o la huida (un animal que nos quiere atacar, el sistema inmune para neutralizar el antígeno (un virus que nos quiere atacar o ambos (la energía es necesaria también para el sistema inmune. Como parece ser que en muchas ocasiones la depresión aparece tras los esfuerzos infructuosos de puesta en marcha de estrategias de afrontamiento, también hemos repasado sucintamente algunas investigaciones que relacionan al sistema inmune con la depresión, así como con los trastornos del sueño. Se finaliza con las aportaciones que la psicología puede ofrecer a nivel terapéutico.

  5. Estudio de los Sistemas Inteligentes de Transporte

    Javato Martín, Moisés

    2015-01-01

    En este trabajo se estudia el estado actual de los Sistemas Inteligentes de Transporte (ITS) en Estados Unidos y Europa, a través de ejemplos reales. En primer lugar, se da una visión general del tema, definiendo los aspectos y actores clave y explicando las áreas de la gestión del tráfico y del vehículo conectado. A continuación, se aborda el desarrollo de los sistemas ITS en el ámbito de la Unión Europea, explicando las principales instituciones y programas de financiación europeos, así com...

  6. Categorizando a los usuarios de sistemas digitales

    Hernández y Hernández, Denise; Ramírez Martinell, Alberto; Cassany, Daniel

    2014-01-01

    Repasamos las categorías más utilizadas para aludir a las características de las personas que utilizan algún tipo de sistema digital, ya sea por su grado de participación en la comunicación global y en los sistemas web -1.0 o 2.0-; por la actitud que toman ante el contenido digital -consumidores o productores-; por su intermitencia en el mundo digital -residentes o visitantes-; o por el momento histórico en el que nacieron -nativos digitales o inmigrantes digitales-, con el propósito de refle...

  7. Sistema de realidad aumentada para aplicaciones Android

    Fernández Sánchez, Natalia Mercedes

    2012-01-01

    El objetivo principal de este proyecto es la creación de un sistema de realidad aumentada para el sistema operativo Android con idea de que sea utilizado para la creación de un videojuego, pero que a su vez sea lo suficientemente versátil como para poder utilizarse en otro tipo de aplicaciones. De este objetivo principal podemos obtener los objetivos secundarios: - Conocer las características que ofrecen los teléfonos móviles y como éstas pueden ser aprovechadas para la crea...

  8. CATEGORIZANDO A LOS USUARIOS DE SISTEMAS DIGITALES.

    Denise Hernández y Hernández; Alberto Ramírez-Martinell; Daniel Cassany

    2014-01-01

    Repasamos las categorías más utilizadas para aludir a las características de las personas que utilizan algún tipo de sistema digital, ya sea por su grado de participación en la comu- nicación global y en los sistemas web -1.0 o 2.0-; por la actitud que toman ante el contenido digital -consumidores o productores-; por su intermitencia en el mundo digital -residentes o visitantes-; o por el momento histórico en el que nacieron -nativos digitales o inmigrantes digitales-, con el propósito de ref...

  9. El sistema de los status de Eugrafio

    Pirovano, Luigi

    2009-01-01

    [ES] Recogiendo y analizando las glosas retóricas del Commentum Terenti atribuido a Eugrafio, es posible reconstruir con un nivel de precisión bastante elevado el sistema de los status utilizado por el comentarista, muy parecido -aunque no igual- a los sistemas «de trece status» que podemos encontrar en los Rhetores Latini Minores. Este análisis nos permite apreciar la naturaleza unitaria del comentario y precisar mejor cuál fue la personalidad y la auténtica finalidad de Eugrafio, a un tiemp...

  10. Sistemas de custos para pequenas empresas industriais

    Moraes, João Vicente de

    2002-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção. Este trabalho define um sistema de custos para pequenas empresas industriais, o qual permite identificar o custo, resultado e margem de contribuição por produto e ponto de equilíbrio , considerando o período de apuração do resultado. O sistema proposto é aplicado em um caso prático, em uma empresa estabelecida na cidade de Cascavel-PR., que produz rodas ...

  11. SCODA para el Desarrollo de Sistemas Multiagente

    Román Gallego, Jesús Ángel; Tapia Martínez, Dante I.; Corchado Rodríguez, Juan M.

    2017-01-01

    El planteamiento de implementar sistemas multiagente de forma que puedan reutilizarse con distintos objetivos, dota a los desarrolladores de una metodología más eficaz en sus fines. Este artículo presenta SCODA, una arquitectura basada en cinco principios: estandaridad, especialización, facilidad de implementación, reutilización y computación distribuida. SCODA pretende facilitar el desarrollo de sistemas multiagente, basándose en el concepto de pequeños grupos de agentes denominados Comunida...

  12. Desarrollo de un sistema de reconocimiento facial

    Vivas Imparato, Abdón Alejandro

    2014-01-01

    El objetivo principal alrededor del cual se desenvuelve este proyecto es el desarrollo de un sistema de reconocimiento facial. Entre sus objetivos específicos se encuentran: realizar una primera aproximación sobre las técnicas de reconocimiento facial existentes en la actualidad, elegir una aplicación donde pueda ser útil el reconocimiento facial, diseñar y desarrollar un programa en MATLAB que lleve a cabo la función de reconocimiento facial, y evaluar el funcionamiento del sistema desarroll...

  13. Sistema de gestión documental

    Fernández Gómez, Javier

    2015-01-01

    Esta memoria expone la planificación, el análisis, el diseño y el desarrollo de un sistema de gestión documental, en adelante SGD, configurable, es decir, adaptable a un ámbito determinado. El SGD consta de dos grupos de interfaces o funcionalidades claramente diferenciadas: administración y gestión documental. Aquesta memòria exposa la planificació, l'anàlisi, el disseny i el desenvolupament d'un sistema de gestió documental, d'ara endavant SGA, configurable, és a dir, adaptable a un àmbi...

  14. Implementação de um sistema SIP para o sistema operacional Linux

    Davison Gonzaga da Silva

    2003-01-01

    Resumo: Este trabalho apresenta a implementação de um Sistema de VoIP usando o Protocolo SIP. Este Sistema SIP foi desenvolvido para o Linux, usando-se a linguagem C++ em conjunto com a biblioteca QT. O Sistema SIP é composto de três entidades básicas: o Terminal SIP, o Proxy e o Servidor de Registros. O Terminal SIP é a entidade responsável por estabelecer sessões SIP com outros Terminais SIP. Para o Terminal SIP, foi desenvolvida uma biblioteca de acesso à placa de áudio, que permite a modi...

  15. A linear programming manual

    Tuey, R. C.

    1972-01-01

    Computer solutions of linear programming problems are outlined. Information covers vector spaces, convex sets, and matrix algebra elements for solving simultaneous linear equations. Dual problems, reduced cost analysis, ranges, and error analysis are illustrated.

  16. Estabilización robusta de sistemas lineales

    Horacio Leyva Castellanos

    2013-12-01

    Full Text Available En este trabajo se muestra un conjunto de resultados que permiten abordar el problema de la estabilización robusta de una familia de sistemas lineales positivos. Se describen dos nuevas aplicaciones en la teoría de control positivo para sistemas compartimentales y se muestra la aplicación de un teorema de robustez para tales sistemas

  17. Linear shaped charge

    Peterson, David; Stofleth, Jerome H.; Saul, Venner W.

    2017-07-11

    Linear shaped charges are described herein. In a general embodiment, the linear shaped charge has an explosive with an elongated arrowhead-shaped profile. The linear shaped charge also has and an elongated v-shaped liner that is inset into a recess of the explosive. Another linear shaped charge includes an explosive that is shaped as a star-shaped prism. Liners are inset into crevices of the explosive, where the explosive acts as a tamper.

  18. Classifying Linear Canonical Relations

    Lorand, Jonathan

    2015-01-01

    In this Master's thesis, we consider the problem of classifying, up to conjugation by linear symplectomorphisms, linear canonical relations (lagrangian correspondences) from a finite-dimensional symplectic vector space to itself. We give an elementary introduction to the theory of linear canonical relations and present partial results toward the classification problem. This exposition should be accessible to undergraduate students with a basic familiarity with linear algebra.

  19. Linear-Algebra Programs

    Lawson, C. L.; Krogh, F. T.; Gold, S. S.; Kincaid, D. R.; Sullivan, J.; Williams, E.; Hanson, R. J.; Haskell, K.; Dongarra, J.; Moler, C. B.

    1982-01-01

    The Basic Linear Algebra Subprograms (BLAS) library is a collection of 38 FORTRAN-callable routines for performing basic operations of numerical linear algebra. BLAS library is portable and efficient source of basic operations for designers of programs involving linear algebriac computations. BLAS library is supplied in portable FORTRAN and Assembler code versions for IBM 370, UNIVAC 1100 and CDC 6000 series computers.

  20. ENEA presenta sistema ADS per trattamento scorie

    2002-01-01

    "Arriva il sistema Ads (Accelerator driven system) per il trattamento dei rifiuti radioattivi. Lo studio di fattibilita' per l' innovativa tecnologia, realizzato da un gruppo di lavoro congiunto Enea, Cea, Cern e Ansaldo, e' stato presentato oggi nel corso di un workshop presieduto dal premio Nobel per la fisica, Carlo Rubbia" (1/2 page).

  1. El Sistema and American Music Education

    Lesniak, Melissa

    2012-01-01

    The brainchild of Jose Antonio Abreu, El Sistema, a music education program for aspiring orchestra musicians launched in Venezuela for students of limited means and now spreading to other parts of the world, has become a subject of interest to music teachers and teacher educators in North America. This article examines a bit of the program's…

  2. Elementos del sistema electoral del Congreso Mexicano

    Aldo Medina García

    2013-08-01

    Full Text Available El presente artículo es un estudio de los componentes del sistema electoral, diseñado por el legislador mexicano para integrar al parlamento federal. Estudio desarrollado a sabiendas de la importancia que reviste el sistema electoral como un medio que permite a los ciudadanos convertir su voto expresado en las urnas en escaños a favor de determinado candidato o partido. En dicho análisis tomamos en cuenta la evolución constitucional del sistema electoral mexicano, la participación de las fuerzas minoritarias en la integración del Senado y de la Cámara de Diputados, la división que se hace del territorio en circunscripciones electorales, la barrera electoral que se fija a los partidos políticos para acceder a la representación en el Parlamento, la fórmula de asignación que se aplica a la votación obtenida, para finalmente concluir que el sistema electoral mexicano es esencialmente mayoritario aun cuando se vista de proporcional.

  3. Observadores Distribuidos Garantistas para Sistemas en Red

    Ramón A. García

    2017-07-01

    Full Text Available Resumen: En este artículo se propone un observador distribuido garantista para sistemas en red, considerando de forma explícita el problema de los retardos variables en las comunicaciones. Se asume que la información intercambiada entre agentes llega siempre a su destino, si bien las comunicaciones están sujetas a retardos variables, cuyo valor máximo se supone conocido. Cada observador trabaja con información parcial, y necesita comunicarse con observadores vecinos para llevar a cabo una estimación del estado completo del sistema. Para representar a los conjuntos garantistas, cuya función es acotar en tiempo real la región en la que se encuentra el estado del sistema, se ha optado por la utilización de zonotopos. Esto permite integrar de forma sencilla la información recibida por cada agente. Finalmente se presentan resultados de simulación para validar el algoritmo propuesto. Abstract: This paper proposes a guaranteed distributed observer for networked systems, taking into account the problem of the variable delays in communications. We assume that the information exchanged among the agents always arrives to its destination, although the communication are subject to variable delays, whose maximum value is known. Each observer works with partial information, and needs to communicate with neighbouring observers to carry out an estimation of the complete state of the system. The guaranteed sets, whose function is to delimit in real time the region in which the state of the system belong to, are represented by zonotopes. This kind of sets allows a simple integration of the information received by each agent. Finally some results obtained with the proposed algorithm are shown in simulations. Palabras clave: Estimación Distribuida, Observadores de Estado, Sistemas con Retardos, Sistemas en red, Zonotopos, Keywords: Distributed Estimation, State Observers, Delays Systems, Networked systems, Zonotopes

  4. Sistema de radiació solar via USB

    Villanueva López, José Vicente

    2008-01-01

    L’objectiu d’aquest projecte és implementar un sistema de mesura de la irradiació solar a la Terra basat en una placa solar fotovoltaica. S’ha dissenyat i construït un sistema de mesura de la radiació solar que pot ser útil per aquells que instal·len sistemes fotovoltaics, que pot permetre l’estudi pràctic de les variables energètiques i econòmiques que ens poden indicar quin sistema és mes rentable construir, si un sistema de pannell solar fix, un sistema de pannell solar o...

  5. Sistema inteligente de detección de intrusiones

    Martínez Puentes, Javier

    2011-01-01

    El sistema diseñado es un sistema de detección de intrusiones mediante el análisis del payload del tráfico de la red en busca de algún tipo de malware. Este sistema implementa su algoritmo de detección como “preprocesador dinámico” de Snort. Mediante el trabajo conjunto de Snort y del Sistema diseñado puede afirmarse que se obtiene un sistema altamente eficaz ante ataques conocidos (mediante el paso de reglas de Snort) e igualmente eficaz ante ataques nuevos o desconocidos (que era el obj...

  6. Sistema de inferencia difusa basado en relaciones Booleanas

    Helbert Eduardo Espitia Cuchango

    2010-09-01

    Full Text Available Este documento describe la estructura de un sistema de inferencia difusa basado en relaciones booleanas. La teoría relacionada con lógica y conjuntos booleanos es una buena herramienta para el diseño de automatismos y sistemas digitales. Una variación con la cual se busca mejorar los sistemas basados en automatismos consiste en emplear conjuntos difusos en lugar de booleanos. Lo anterior se realiza con el objetivo de tener una acción continua en el actuador del automatismo. Al realizar esta variación y al aplicar la metodología de diseño de los sistemas de automatismos, aparecen los sistemas de inferencia difusa basados en relaciones booleanas.Aunque inicialmente esta propuesta se realizó considerando sistemas de automatismos, se observa que es posible extenderla a sistemas de inferencia difusa.

  7. Non linear system become linear system

    Petre Bucur

    2007-01-01

    Full Text Available The present paper refers to the theory and the practice of the systems regarding non-linear systems and their applications. We aimed the integration of these systems to elaborate their response as well as to highlight some outstanding features.

  8. Linear motor coil assembly and linear motor

    2009-01-01

    An ironless linear motor (5) comprising a magnet track (53) and a coil assembly (50) operating in cooperation with said magnet track (53) and having a plurality of concentrated multi-turn coils (31 a-f, 41 a-d, 51 a-k), wherein the end windings (31E) of the coils (31 a-f, 41 a-e) are substantially

  9. Linear collider: a preview

    Wiedemann, H.

    1981-11-01

    Since no linear colliders have been built yet it is difficult to know at what energy the linear cost scaling of linear colliders drops below the quadratic scaling of storage rings. There is, however, no doubt that a linear collider facility for a center of mass energy above say 500 GeV is significantly cheaper than an equivalent storage ring. In order to make the linear collider principle feasible at very high energies a number of problems have to be solved. There are two kinds of problems: one which is related to the feasibility of the principle and the other kind of problems is associated with minimizing the cost of constructing and operating such a facility. This lecture series describes the problems and possible solutions. Since the real test of a principle requires the construction of a prototype I will in the last chapter describe the SLC project at the Stanford Linear Accelerator Center.

  10. Basic linear algebra

    Blyth, T S

    2002-01-01

    Basic Linear Algebra is a text for first year students leading from concrete examples to abstract theorems, via tutorial-type exercises. More exercises (of the kind a student may expect in examination papers) are grouped at the end of each section. The book covers the most important basics of any first course on linear algebra, explaining the algebra of matrices with applications to analytic geometry, systems of linear equations, difference equations and complex numbers. Linear equations are treated via Hermite normal forms which provides a successful and concrete explanation of the notion of linear independence. Another important highlight is the connection between linear mappings and matrices leading to the change of basis theorem which opens the door to the notion of similarity. This new and revised edition features additional exercises and coverage of Cramer's rule (omitted from the first edition). However, it is the new, extra chapter on computer assistance that will be of particular interest to readers:...

  11. Linear collider: a preview

    Wiedemann, H.

    1981-11-01

    Since no linear colliders have been built yet it is difficult to know at what energy the linear cost scaling of linear colliders drops below the quadratic scaling of storage rings. There is, however, no doubt that a linear collider facility for a center of mass energy above say 500 GeV is significantly cheaper than an equivalent storage ring. In order to make the linear collider principle feasible at very high energies a number of problems have to be solved. There are two kinds of problems: one which is related to the feasibility of the principle and the other kind of problems is associated with minimizing the cost of constructing and operating such a facility. This lecture series describes the problems and possible solutions. Since the real test of a principle requires the construction of a prototype I will in the last chapter describe the SLC project at the Stanford Linear Accelerator Center

  12. Matrices and linear transformations

    Cullen, Charles G

    1990-01-01

    ""Comprehensive . . . an excellent introduction to the subject."" - Electronic Engineer's Design Magazine.This introductory textbook, aimed at sophomore- and junior-level undergraduates in mathematics, engineering, and the physical sciences, offers a smooth, in-depth treatment of linear algebra and matrix theory. The major objects of study are matrices over an arbitrary field. Contents include Matrices and Linear Systems; Vector Spaces; Determinants; Linear Transformations; Similarity: Part I and Part II; Polynomials and Polynomial Matrices; Matrix Analysis; and Numerical Methods. The first

  13. Efficient Non Linear Loudspeakers

    Petersen, Bo R.; Agerkvist, Finn T.

    2006-01-01

    Loudspeakers have traditionally been designed to be as linear as possible. However, as techniques for compensating non linearities are emerging, it becomes possible to use other design criteria. This paper present and examines a new idea for improving the efficiency of loudspeakers at high levels...... by changing the voice coil layout. This deliberate non-linear design has the benefit that a smaller amplifier can be used, which has the benefit of reducing system cost as well as reducing power consumption....

  14. Linear models with R

    Faraway, Julian J

    2014-01-01

    A Hands-On Way to Learning Data AnalysisPart of the core of statistics, linear models are used to make predictions and explain the relationship between the response and the predictors. Understanding linear models is crucial to a broader competence in the practice of statistics. Linear Models with R, Second Edition explains how to use linear models in physical science, engineering, social science, and business applications. The book incorporates several improvements that reflect how the world of R has greatly expanded since the publication of the first edition.New to the Second EditionReorganiz

  15. Linear integrated circuits

    Carr, Joseph

    1996-01-01

    The linear IC market is large and growing, as is the demand for well trained technicians and engineers who understand how these devices work and how to apply them. Linear Integrated Circuits provides in-depth coverage of the devices and their operation, but not at the expense of practical applications in which linear devices figure prominently. This book is written for a wide readership from FE and first degree students, to hobbyists and professionals.Chapter 1 offers a general introduction that will provide students with the foundations of linear IC technology. From chapter 2 onwa

  16. Fault tolerant linear actuator

    Tesar, Delbert

    2004-09-14

    In varying embodiments, the fault tolerant linear actuator of the present invention is a new and improved linear actuator with fault tolerance and positional control that may incorporate velocity summing, force summing, or a combination of the two. In one embodiment, the invention offers a velocity summing arrangement with a differential gear between two prime movers driving a cage, which then drives a linear spindle screw transmission. Other embodiments feature two prime movers driving separate linear spindle screw transmissions, one internal and one external, in a totally concentric and compact integrated module.

  17. Superconducting linear accelerator cryostat

    Ben-Zvi, I.; Elkonin, B.V.; Sokolowski, J.S.

    1984-01-01

    A large vertical cryostat for a superconducting linear accelerator using quarter wave resonators has been developed. The essential technical details, operational experience and performance are described. (author)

  18. Clasificación y detección de fallas en Sistemas Dinámicos

    Javier Hernando Pardo Mayorga

    2006-05-01

    Full Text Available En los sistemas dinámicos se pueden presentar fallas en cualquier instante de tiempo, estas fallas pueden ser generadas en gran cantidad de casos por la variación de uno o más parámetros de la planta o del sistema dinámico. En este trabajo se propone la detección de fallas en una planta no lineal de dos tanques acoplados uno con área constante y otro variable con la altura esto basado en observadores adaptivos, sustentado con clasificación LAMDA y análisis de componentes principales. Se presenta la aplicación del algoritmo en un sistema no lineal, control del nivel en un sistema de tanques acoplados, así como el análisis de resultados conclusiones y perspectivas futuras./ In the dynamic systems a fail can occur in any moment, the fail can be present for variations in one or more parameter of the dynamic system. This paper present a fail detection in a non linear system compose by two tanks in parallel one with constant transversal area and the other one with variable area, the work is develop with adaptive observers and LAMDA classification. The application on this paper is in a non linear system, the level control in the two tank system.

  19. Linearity enigmas in ecology

    Patten, B.C.

    1983-04-01

    Two issues concerning linearity or nonlinearity of natural systems are considered. Each is related to one of the two alternative defining properties of linear systems, superposition and decomposition. Superposition exists when a linear combination of inputs to a system results in the same linear combination of outputs that individually correspond to the original inputs. To demonstrate this property it is necessary that all initial states and inputs of the system which impinge on the output in question be included in the linear combination manipulation. As this is difficult or impossible to do with real systems of any complexity, nature appears nonlinear even though it may be linear. A linear system that displays nonlinear behavior for this reason is termed pseudononlinear. The decomposition property exists when the dynamic response of a system can be partitioned into an input-free portion due to state plus a state-free portion due to input. This is a characteristic of all linear systems, but not of nonlinear systems. Without the decomposition property, it is not possible to distinguish which portions of a system's behavior are due to innate characteristics (self) vs. outside conditions (environment), which is an important class of questions in biology and ecology. Some philosophical aspects of these findings are then considered. It is suggested that those ecologists who hold to the view that organisms and their environments are separate entities are in effect embracing a linear view of nature, even though their belief systems and mathematical models tend to be nonlinear. On the other hand, those who consider that organism-environment complex forms a single inseparable unit are implictly involved in non-linear thought, which may be in conflict with the linear modes and models that some of them use. The need to rectify these ambivalences on the part of both groups is indicated.

  20. Sistemas electorales y justicia electoral a debate

    Dieter Nohlen

    2015-07-01

    Full Text Available Despliega conceptos y planteamientos en torno a los sistemas electorales y la justicia electoral. El autor inicia con una descripción estricta de los sistemas electorales para orientar, en una segunda parte, un debate sobre la justicia electoral, que marca dos tendencias: la judicialización de la política y la politización de la administración y la jurisdicción electoral. Concluye que el desarrollo de la justicia electoral en América Latina, en sus múltiples dimensiones, es comprensible sólo con referencia al contexto sociocultural y político de la región

  1. Sistema de seguridad en redes locales utilizando sistemas multiagentes distribuidos. Net-Mass

    Daniel Horfan Álvarez

    2005-01-01

    Full Text Available La seguridad en las redes de datos es uno de los elementos neurálgicos dentro de una organización, ya que requiere de diferentes estrategias de protección para salvaguardar puntos vulnerables, y de la coordinación y distribución de esfuerzos para cercar todas las posibles formas de ataques informáticos. En este artículo se propone un sistema multiagente distribuido como herramienta de protección para redes con diferentes sistemas operativos y susceptibilidad de diversos ataques.El sistema propuesto está conformado por un grupo de agentes autónomos heterogéneos con características particulares en cuanto a sus estrategias de detección de intrusos y protección de los sistemas primordiales de la red, se tiene planeado que estos agentes basen sus decisiones en la aplicación de diferentes técnicas de inteligencia artificial como heurística de sistemas expertos, algoritmos evolutivos y redes neuronales.

  2. Linear colliders - prospects 1985

    Rees, J.

    1985-06-01

    We discuss the scaling laws of linear colliders and their consequences for accelerator design. We then report on the SLAC Linear Collider project and comment on experience gained on that project and its application to future colliders. 9 refs., 2 figs

  3. The SLAC linear collider

    Richter, B.

    1985-01-01

    A report is given on the goals and progress of the SLAC Linear Collider. The author discusses the status of the machine and the detectors and give an overview of the physics which can be done at this new facility. He also gives some ideas on how (and why) large linear colliders of the future should be built

  4. Linear Programming (LP)

    Rogner, H.H.

    1989-01-01

    The submitted sections on linear programming are extracted from 'Theorie und Technik der Planung' (1978) by W. Blaas and P. Henseler and reformulated for presentation at the Workshop. They consider a brief introduction to the theory of linear programming and to some essential aspects of the SIMPLEX solution algorithm for the purposes of economic planning processes. 1 fig

  5. Racetrack linear accelerators

    Rowe, C.H.; Wilton, M.S. de.

    1979-01-01

    An improved recirculating electron beam linear accelerator of the racetrack type is described. The system comprises a beam path of four straight legs with four Pretzel bending magnets at the end of each leg to direct the beam into the next leg of the beam path. At least one of the beam path legs includes a linear accelerator. (UK)

  6. Sistema das Artes Visuais no Brasil

    Nei Vargas da Rosa

    2017-10-01

    Full Text Available O Dossiê Sistema das Artes Visuais no Brasil se oferece como um profícuo dispositivo de análise do sistema da arte e de seu crescimento e avanço como objeto de reflexão e investigação. Reúne um grupo de pesquisadoras e pesquisadores que respondem por estudos de temas diversos, como a compreensão dos processos de valoração, considerando seus aspectos simbólicos e mercadológicos; a discussão sobre a gestão dos aparelhos culturais em meio ao receituário da política econômica centrada no mercado; a inserção recente de instrumentos de visibilidade e circulação da arte, como as ferias de arte e a Internet; o papel de colecionadores e colecionadoras no sistema de arte; entre outros assuntos; e os estudos sobre educação em museu de arte. Assim, o Dossiê segue uma ordenação que busca oferecer uma lógica conceitual e factual para compreensão do tema proposto, não excluindo a possibilidade de leitura direta a textos que ofereçam conteúdo de interesses específicos dos leitores e leitoras.

  7. Semidefinite linear complementarity problems

    Eckhardt, U.

    1978-04-01

    Semidefinite linear complementarity problems arise by discretization of variational inequalities describing e.g. elastic contact problems, free boundary value problems etc. In the present paper linear complementarity problems are introduced and the theory as well as the numerical treatment of them are described. In the special case of semidefinite linear complementarity problems a numerical method is presented which combines the advantages of elimination and iteration methods without suffering from their drawbacks. This new method has very attractive properties since it has a high degree of invariance with respect to the representation of the set of all feasible solutions of a linear complementarity problem by linear inequalities. By means of some practical applications the properties of the new method are demonstrated. (orig.) [de

  8. Linear algebra done right

    Axler, Sheldon

    2015-01-01

    This best-selling textbook for a second course in linear algebra is aimed at undergrad math majors and graduate students. The novel approach taken here banishes determinants to the end of the book. The text focuses on the central goal of linear algebra: understanding the structure of linear operators on finite-dimensional vector spaces. The author has taken unusual care to motivate concepts and to simplify proofs. A variety of interesting exercises in each chapter helps students understand and manipulate the objects of linear algebra. The third edition contains major improvements and revisions throughout the book. More than 300 new exercises have been added since the previous edition. Many new examples have been added to illustrate the key ideas of linear algebra. New topics covered in the book include product spaces, quotient spaces, and dual spaces. Beautiful new formatting creates pages with an unusually pleasant appearance in both print and electronic versions. No prerequisites are assumed other than the ...

  9. Handbook on linear motor application

    1988-10-01

    This book guides the application for Linear motor. It lists classification and speciality of Linear Motor, terms of linear-induction motor, principle of the Motor, types on one-side linear-induction motor, bilateral linear-induction motor, linear-DC Motor on basic of the motor, linear-DC Motor for moving-coil type, linear-DC motor for permanent-magnet moving type, linear-DC motor for electricity non-utility type, linear-pulse motor for variable motor, linear-pulse motor for permanent magneto type, linear-vibration actuator, linear-vibration actuator for moving-coil type, linear synchronous motor, linear electromagnetic motor, linear electromagnetic solenoid, technical organization and magnetic levitation and linear motor and sensor.

  10. Control integral systems; Sistemas integrales de control

    Burgos, Estrella [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1999-12-31

    Almost two third of the electric power generation in Mexico are obtained from hydrocarbons, for that reasons Comision Federal de Electricidad (CFE) dedicated special commitment in modernizing the operation of fossil fuel central stations. In attaining this objective the control systems play a fundamental roll, from them depend a good share of the reliability and the efficiency of the electric power generation process, as well as the extension of the equipment useful life. Since 1984 the Instituto de Investigaciones Electricas (IIE) has been working, upon the request of CFE, on the development of digital control systems. To date it has designed and implemented a logic control system for gas burners, which controls 32 burners of the Unit 4 boiler of the Generation Central of Valle de Mexico and two systems for distributed control for two combined cycle central stations, which are: Dos Bocas, Veracruz Combined cycle central, and Gomez Palacio, Durango combined cycle central. With these two developments the IIE enters the World tendency of implementing distributed control systems for the fossil fuel power central update [Espanol] Casi las dos terceras partes de la generacion electrica en Mexico se obtienen a partir de hidrocarburos, es por eso que la Comision Federal de Electricidad (CFE) puso especial empeno en modernizar la operacion de las centrales termoelectricas de combustibles fosiles. En el logro de este objetivo los sistemas de control desempenan un papel fundamental, de ellos depende una buena parte la confiabilidad y la eficiencia en el proceso de generacion de energia electrica, asi como la prolongacion de la vida util de los equipos. Desde 1984 el Instituto de Investigaciones Electricas (IIE) ha trabajado, a solicitud de la CFE, en el desarrollo de sistemas digitales de control. A la fecha se han disenado e implantado un sistema de control logico de quemadores de gas, el cual controla 32 quemadores de la caldera de la unidad 4 de la central de generacion

  11. Control integral systems; Sistemas integrales de control

    Burgos, Estrella [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-12-31

    Almost two third of the electric power generation in Mexico are obtained from hydrocarbons, for that reasons Comision Federal de Electricidad (CFE) dedicated special commitment in modernizing the operation of fossil fuel central stations. In attaining this objective the control systems play a fundamental roll, from them depend a good share of the reliability and the efficiency of the electric power generation process, as well as the extension of the equipment useful life. Since 1984 the Instituto de Investigaciones Electricas (IIE) has been working, upon the request of CFE, on the development of digital control systems. To date it has designed and implemented a logic control system for gas burners, which controls 32 burners of the Unit 4 boiler of the Generation Central of Valle de Mexico and two systems for distributed control for two combined cycle central stations, which are: Dos Bocas, Veracruz Combined cycle central, and Gomez Palacio, Durango combined cycle central. With these two developments the IIE enters the World tendency of implementing distributed control systems for the fossil fuel power central update [Espanol] Casi las dos terceras partes de la generacion electrica en Mexico se obtienen a partir de hidrocarburos, es por eso que la Comision Federal de Electricidad (CFE) puso especial empeno en modernizar la operacion de las centrales termoelectricas de combustibles fosiles. En el logro de este objetivo los sistemas de control desempenan un papel fundamental, de ellos depende una buena parte la confiabilidad y la eficiencia en el proceso de generacion de energia electrica, asi como la prolongacion de la vida util de los equipos. Desde 1984 el Instituto de Investigaciones Electricas (IIE) ha trabajado, a solicitud de la CFE, en el desarrollo de sistemas digitales de control. A la fecha se han disenado e implantado un sistema de control logico de quemadores de gas, el cual controla 32 quemadores de la caldera de la unidad 4 de la central de generacion

  12. Linear ubiquitination in immunity.

    Shimizu, Yutaka; Taraborrelli, Lucia; Walczak, Henning

    2015-07-01

    Linear ubiquitination is a post-translational protein modification recently discovered to be crucial for innate and adaptive immune signaling. The function of linear ubiquitin chains is regulated at multiple levels: generation, recognition, and removal. These chains are generated by the linear ubiquitin chain assembly complex (LUBAC), the only known ubiquitin E3 capable of forming the linear ubiquitin linkage de novo. LUBAC is not only relevant for activation of nuclear factor-κB (NF-κB) and mitogen-activated protein kinases (MAPKs) in various signaling pathways, but importantly, it also regulates cell death downstream of immune receptors capable of inducing this response. Recognition of the linear ubiquitin linkage is specifically mediated by certain ubiquitin receptors, which is crucial for translation into the intended signaling outputs. LUBAC deficiency results in attenuated gene activation and increased cell death, causing pathologic conditions in both, mice, and humans. Removal of ubiquitin chains is mediated by deubiquitinases (DUBs). Two of them, OTULIN and CYLD, are constitutively associated with LUBAC. Here, we review the current knowledge on linear ubiquitination in immune signaling pathways and the biochemical mechanisms as to how linear polyubiquitin exerts its functions distinctly from those of other ubiquitin linkage types. © 2015 The Authors. Immunological Reviews Published by John Wiley & Sons Ltd.

  13. Importancia del manual de los sistemas contables en el sistema de control interno.

    Nicolás Valdés Rodríguez

    2007-01-01

    La dirección administrativa del país en los últimos 3 años ha insistido en la necesidad de profundizar en los mecanismos de control económico –financiero de las entidades, el presente trabajo va dirigido a contribuir en alguna medida a lograr ese propósito. El sistema contable de una Entidad forma parte indisoluble del Sistema de Control Interno de la misma, por la vinculación tan estrecha que existe entre los mismos. El objetivo fundamental del trabajo ”Importancia del Manual de ...

  14. Del Actual Sistema de Enfermedad a un verdadero Sistema de Salud

    Lidice Alvarez-Miño

    2018-01-01

    Full Text Available Esta editorial tiene como objetivo generar una reflexión y abrir el debate sobre el sistema actual de salud que se refleja en prácticas naturalizadas  que se contradicen con la esencia del significado de la salud. Se trata de la costumbre de acudir al sistema de salud únicamente cuando se considera que se está enfermo, o peor aún, la equivalencia reduccionista y casi automática del concepto de salud como sinónimo de medicina.

  15. Linearizing W-algebras

    Krivonos, S.O.; Sorin, A.S.

    1994-06-01

    We show that the Zamolodchikov's and Polyakov-Bershadsky nonlinear algebras W 3 and W (2) 3 can be embedded as subalgebras into some linear algebras with finite set of currents. Using these linear algebras we find new field realizations of W (2) 3 and W 3 which could be a starting point for constructing new versions of W-string theories. We also reveal a number of hidden relationships between W 3 and W (2) 3 . We conjecture that similar linear algebras can exist for other W-algebra as well. (author). 10 refs

  16. Matrices and linear algebra

    Schneider, Hans

    1989-01-01

    Linear algebra is one of the central disciplines in mathematics. A student of pure mathematics must know linear algebra if he is to continue with modern algebra or functional analysis. Much of the mathematics now taught to engineers and physicists requires it.This well-known and highly regarded text makes the subject accessible to undergraduates with little mathematical experience. Written mainly for students in physics, engineering, economics, and other fields outside mathematics, the book gives the theory of matrices and applications to systems of linear equations, as well as many related t

  17. Linearity in Process Languages

    Nygaard, Mikkel; Winskel, Glynn

    2002-01-01

    The meaning and mathematical consequences of linearity (managing without a presumed ability to copy) are studied for a path-based model of processes which is also a model of affine-linear logic. This connection yields an affine-linear language for processes, automatically respecting open......-map bisimulation, in which a range of process operations can be expressed. An operational semantics is provided for the tensor fragment of the language. Different ways to make assemblies of processes lead to different choices of exponential, some of which respect bisimulation....

  18. Elements of linear space

    Amir-Moez, A R; Sneddon, I N

    1962-01-01

    Elements of Linear Space is a detailed treatment of the elements of linear spaces, including real spaces with no more than three dimensions and complex n-dimensional spaces. The geometry of conic sections and quadric surfaces is considered, along with algebraic structures, especially vector spaces and transformations. Problems drawn from various branches of geometry are given.Comprised of 12 chapters, this volume begins with an introduction to real Euclidean space, followed by a discussion on linear transformations and matrices. The addition and multiplication of transformations and matrices a

  19. Applied linear regression

    Weisberg, Sanford

    2013-01-01

    Praise for the Third Edition ""...this is an excellent book which could easily be used as a course text...""-International Statistical Institute The Fourth Edition of Applied Linear Regression provides a thorough update of the basic theory and methodology of linear regression modeling. Demonstrating the practical applications of linear regression analysis techniques, the Fourth Edition uses interesting, real-world exercises and examples. Stressing central concepts such as model building, understanding parameters, assessing fit and reliability, and drawing conclusions, the new edition illus

  20. Caos en sistemas clásico-cuánticos

    Dirani, L. D.; Núñez, J. A.

    Una de las formas de estudiar la existencia de caos en el comportamiento de un sistema clásico-cuántico, es truncando el espacio de Hilbert del sistema cuántico. El objetivo de este trabajo es analizar como afecta dicho truncamiento en la dinámica del sistema. Para tal fin se propone un Hamiltoniano integrable, cuyos valores de expectación asociados a coordenadas y momentos cuánticos responden, por el teorema de Ehrenfest, a un sistema de dos osciladores clásicos con acoplamiento lineal.

  1. Um modelo de enfermagem como sistema complexo adaptativo

    Mariana Vieira

    2009-01-01

    Full Text Available El surgimiento y el uso de los sistemas complejos adaptativos suplieron la necesidad de contar con una nueva alternativa, recurriendo a los paradigmas existentes. En cuanto al sistema de salud y de enfermería, ambos pueden verse como sistemas complejos adaptativos al aplicar un modelo visual que debe ser explorado para potenciar la complejidad de la ciencia de enfermería y de cuidados de salud. Desde esta perspectiva, el/la enfermero/a es un sistema complejo adaptativo, dinámico que interactúa, pero también es agente de un sistema complejo adaptativo en una unidad de enfermería, que a la vez es un sistema complejo adaptativo en una organización de la salud. Hoy en día la/el profesional de enfermería busca actualizarse y cualificarse en diversas especialidades, que van desde enfermería neonatal hasta cuidados geriátricos, para ejecutar sus actividades y visualizar su ambiente laboral desde la perspectiva de un sistema complejo. En consecuencia, la organización del sistema de cuidados permite, mediante los sistemas complejos, apoyarse en el saber compartido de los diversos profesionales y en el trabajo en equipo para disfrutar la complicidad de la cadena cliente-usuario-profesionales.

  2. Sistema fotovoltaico de iluminación solar

    Víctor Hugo Benítez Baltazar; Guadalupe Araceli Torres Valverde; Luis Armando Gámez Valdéz; Jesús Horacio Pacheco Ramírez

    2013-01-01

    El artículo es el resultado de un trabajo de investigación enfocado al uso de sistemas fotovoltaicos para la iluminación por medio de diodos emisores de luz tipo LED. Se busca reducir el consumo energético mediante la implementación de un sistema de iluminación basado en LED hasta en un 80%, donde la fuente primaria de energía es el Sol. Se demuestra la viabilidad de los sistemas solares de iluminación LED mediante la construcción de un prototipo. Los sistemas de iluminación fotovoltaicos son...

  3. Wind power prognosis statistical system; Sistema estadistico de pronostico de la energia eoloelectrica

    Rodriguez Garcia, Alfredo; De la Torre Vega, Eli [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico)

    2009-07-01

    The integration of the first Aeolian farm of large scale (La Venta II) to the National Interconnected System requires taking into account the random and discontinuous nature of the Aeolian energy. An important tool, for this task, is a system for the prognosis of the Aeolian energy in the short term. For this reason, the Instituto of Investigaciones Electricas (IIE) developed a statistical model to realize this prognosis. The prediction is done through an adaptable linear combination of alternative competing models, where the weights given to each model are based on its more recent prognosis quality. Also, the application results of the prognoses system are presented and analyzed. [Spanish] La integracion de la primera grana eolica de gran escala (La Venta II) al Sistema Interconectado Nacional requiere tomar en cuenta la naturaleza aleatoria y discontinua de la energia eolica. Una importante herramienta, para esta tarea, es un sistema para el pronostico de la energia eolica a corto plazo. Por ello, el Instituto de Investigaciones Electricas (IIE) desarrollo un modelo estadistico para realizar este pronostico. La prediccion es hecha a traves de una combinacion lineal adaptable de modelos competidores alternativos, donde los pesos dados a cada modelo estan basados en su mas reciente calidad de pronostico. Tambien se presentan y analizan los resultados de la aplicacion del sistema de pronosticos.

  4. Linear system theory

    Callier, Frank M.; Desoer, Charles A.

    1991-01-01

    The aim of this book is to provide a systematic and rigorous access to the main topics of linear state-space system theory in both the continuous-time case and the discrete-time case; and the I/O description of linear systems. The main thrusts of the work are the analysis of system descriptions and derivations of their properties, LQ-optimal control, state feedback and state estimation, and MIMO unity-feedback systems.

  5. El Sistema de patentes en Colombia

    Rafael Viana Barceló

    2014-01-01

    Full Text Available En este documento se realiza un análisis económico del Sistema de Patentes de Colombia. Para ello, se establece el efecto que tienen las patentes concedidas a los inventores foráneos sobre la Inversión Extranjera Directa y el Producto Interno Bruto Nacional, a través de la técnica de regresión de data panel. De igual manera, se identifican los sectores económicos que registran mayores tasas de innovación por parte de los inventores nacionales y extranjeros. Se muestra que el sistema nacional de propiedad intelectual tiene un grado de fortaleza acorde con el resto de países latinoamericanos; para ello, se construye un índice de grado de fortalecimiento de sistema de patente nacional que luego será comparado con el de otros países latinos.Palabras Clave: Sistema de Patentes; Derechos de Propiedad Intelectual; Inversión Directa extranjera; Producto Interno Bruto e innovación tecnológica. The system of patents in ColombiaAbstractIn this document an economic analysis of the System of Patents of Colombia is made. For it, the effect that has the patents granted to the foreign inventors on the Direct Foreign Investment and the Internal Product Gross National, through the technique of regression of data settles down panel. Of equal way, the economic sectors are identified that register greater rates of innovation on the part of the national and foreign inventors.Sample that the national system of intellectual property has a degree of agreed strength with the rest of Latin American countries; for it, an index of degree of fortification of system of national patent is constructed that soon will be compared with the one of other Latin countries.Keywords: System Patent; Rights of Intellectual Property; Foreign Direct Investment; Gross Domestic Product and Technology Innovation.

  6. CAPACIDAD TRANSACCIONAL: EVIDENCIAS DEL SISTEMA FINANCIERO PERUANO

    TELLO-GAMARRA, JORGE; HERNANI-MERINO, MARTÍN; LÍMACO-MAMANI, BRYAN IVÁN

    2017-01-01

    RESUMEN Aunque existen algunos esfuerzos por integrar las perspectivas de capacidades y la economía de los costos de transacción, los avances en esa dirección son escasos. La integración de esas dos perspectivas es una emergente área de estudio llamada capacidad transaccional. Este artículo tiene por objetivo examinar la capacidad transaccional de firmas que operan en el sistema financiero peruano. El método escogido para la búsqueda de evidencias en ese sector es el estudio de casos múltiple...

  7. Viabilidade financeira em sistema de aquaponia

    Kodama, Goro

    2016-01-01

    O presente estudo avaliou uma propriedade particular do em torno de Brasília que utiliza o sistema de aquaponia numa escala pequena de produção. Foi utilizado o método Monte Carlo para estimar a sua viabilidade financeira e a probabilidade do volume de produção e consequentemente avaliar o risco desse empreendimento. Os dados analisados foram os custos fixos e variáveis, receitas e os indicadores de viabilidade financeira que são valor presente líquido (VPL), benefício periódico econômico (BP...

  8. Uvajanje sistema poslovne inteligence v koncernu

    Menard, Nejc

    2016-01-01

    Skupaj z rastjo poslovnih sistemov raste tudi potreba po ustreznih informacijah o stanju znotraj sistema. V te namene so bili razviti sistemi poslovne inteligence. Ta širok pojem omogoča podjetjem ali organizacijam vpogled v delovanje njihovih kritičnih funkcij skozi orodja za poročila, analizo in vizualizacije. Na podlagi privzetega modela uvajanja informacijskih rešitev smo zapisali usklajene prilagoditve in jih preverili na primeru implementacije rešitve v koncernu Kolektor. S tem spec...

  9. Importancia del manual de los sistemas contables en el sistema de control interno.

    Nicolás Valdés Rodríguez

    2007-01-01

    Full Text Available La dirección administrativa del país en los últimos 3 años ha insistido en la necesidad de profundizar en los mecanismos de control económico –financiero de las entidades, el presente trabajo va dirigido a contribuir en alguna medida a lograr ese propósito. El sistema contable de una Entidad forma parte indisoluble del Sistema de Control Interno de la misma, por la vinculación tan estrecha que existe entre los mismos. El objetivo fundamental del trabajo ”Importancia del Manual de los Sistemas Contables en el Sistema de Control Interno”, es destacar la utilidad práctica, técnica y organizativa que tiene el Manual para elevar la eficiencia del trabajo contable de las Entidades y su repercusión positiva en la eficiencia el sistema de Control Interno establecido. Los beneficios que aporta el Manual radican en que crea una base normativa contable adecuada a las características de cada entidad. Como se sabe en las transformaciones económicas realizadas en el país, la existencia de dos monedas en el trabajo económico-contable de muchas entidades, la puntualización del objeto social y la cartera de productos y servicios han complejizado el trabajo contable, requiriendo una mayor adecuación a las características propias de cada entidad, lo cual se logra con la realización del Manual.

  10. Further linear algebra

    Blyth, T S

    2002-01-01

    Most of the introductory courses on linear algebra develop the basic theory of finite­ dimensional vector spaces, and in so doing relate the notion of a linear mapping to that of a matrix. Generally speaking, such courses culminate in the diagonalisation of certain matrices and the application of this process to various situations. Such is the case, for example, in our previous SUMS volume Basic Linear Algebra. The present text is a continuation of that volume, and has the objective of introducing the reader to more advanced properties of vector spaces and linear mappings, and consequently of matrices. For readers who are not familiar with the contents of Basic Linear Algebra we provide an introductory chapter that consists of a compact summary of the prerequisites for the present volume. In order to consolidate the student's understanding we have included a large num­ ber of illustrative and worked examples, as well as many exercises that are strategi­ cally placed throughout the text. Solutions to the ex...

  11. Linear mass reflectron

    Mamyrin, B.A.; Shmikk, D.V.

    1979-01-01

    A description and operating principle of a linear mass reflectron with V-form trajectory of ion motion -a new non-magnetic time-of-flight mass spectrometer with high resolution are presented. The ion-optical system of the device consists of an ion source with ionization by electron shock, of accelerating gaps, reflector gaps, a drift space and ion detector. Ions move in the linear mass refraction along the trajectories parallel to the axis of the analyzer chamber. The results of investigations into the experimental device are given. With an ion drift length of 0.6 m the device resolution is 1200 with respect to the peak width at half-height. Small-sized mass spectrometric transducers with high resolution and sensitivity may be designed on the base of the linear mass reflectron principle

  12. Applied linear algebra

    Olver, Peter J

    2018-01-01

    This textbook develops the essential tools of linear algebra, with the goal of imparting technique alongside contextual understanding. Applications go hand-in-hand with theory, each reinforcing and explaining the other. This approach encourages students to develop not only the technical proficiency needed to go on to further study, but an appreciation for when, why, and how the tools of linear algebra can be used across modern applied mathematics. Providing an extensive treatment of essential topics such as Gaussian elimination, inner products and norms, and eigenvalues and singular values, this text can be used for an in-depth first course, or an application-driven second course in linear algebra. In this second edition, applications have been updated and expanded to include numerical methods, dynamical systems, data analysis, and signal processing, while the pedagogical flow of the core material has been improved. Throughout, the text emphasizes the conceptual connections between each application and the un...

  13. Theory of linear operations

    Banach, S

    1987-01-01

    This classic work by the late Stefan Banach has been translated into English so as to reach a yet wider audience. It contains the basics of the algebra of operators, concentrating on the study of linear operators, which corresponds to that of the linear forms a1x1 + a2x2 + ... + anxn of algebra.The book gathers results concerning linear operators defined in general spaces of a certain kind, principally in Banach spaces, examples of which are: the space of continuous functions, that of the pth-power-summable functions, Hilbert space, etc. The general theorems are interpreted in various mathematical areas, such as group theory, differential equations, integral equations, equations with infinitely many unknowns, functions of a real variable, summation methods and orthogonal series.A new fifty-page section (``Some Aspects of the Present Theory of Banach Spaces'''') complements this important monograph.

  14. Dimension of linear models

    Høskuldsson, Agnar

    1996-01-01

    Determination of the proper dimension of a given linear model is one of the most important tasks in the applied modeling work. We consider here eight criteria that can be used to determine the dimension of the model, or equivalently, the number of components to use in the model. Four of these cri......Determination of the proper dimension of a given linear model is one of the most important tasks in the applied modeling work. We consider here eight criteria that can be used to determine the dimension of the model, or equivalently, the number of components to use in the model. Four...... the basic problems in determining the dimension of linear models. Then each of the eight measures are treated. The results are illustrated by examples....

  15. Linear programming using Matlab

    Ploskas, Nikolaos

    2017-01-01

    This book offers a theoretical and computational presentation of a variety of linear programming algorithms and methods with an emphasis on the revised simplex method and its components. A theoretical background and mathematical formulation is included for each algorithm as well as comprehensive numerical examples and corresponding MATLAB® code. The MATLAB® implementations presented in this book  are sophisticated and allow users to find solutions to large-scale benchmark linear programs. Each algorithm is followed by a computational study on benchmark problems that analyze the computational behavior of the presented algorithms. As a solid companion to existing algorithmic-specific literature, this book will be useful to researchers, scientists, mathematical programmers, and students with a basic knowledge of linear algebra and calculus.  The clear presentation enables the reader to understand and utilize all components of simplex-type methods, such as presolve techniques, scaling techniques, pivoting ru...

  16. Linear Colliders TESLA

    Anon.

    1994-01-01

    The aim of the TESLA (TeV Superconducting Linear Accelerator) collaboration (at present 19 institutions from seven countries) is to establish the technology for a high energy electron-positron linear collider using superconducting radiofrequency cavities to accelerate its beams. Another basic goal is to demonstrate that such a collider can meet its performance goals in a cost effective manner. For this the TESLA collaboration is preparing a 500 MeV superconducting linear test accelerator at the DESY Laboratory in Hamburg. This TTF (TESLA Test Facility) consists of four cryomodules, each approximately 12 m long and containing eight 9-cell solid niobium cavities operating at a frequency of 1.3 GHz

  17. Sistemas de control push-pull. Un estudio comparativo.

    Ruiz Usano, Rafael; Muñoz Pérez, Miguel Ángel

    2001-01-01

    Un aspecto fundamental a nivel operacional en los sistemas de producción es la obtención de la cantidad deseada de unidades a producir con la mínima cantidad de inventario en proceso. Para conseguirlo podemos optar por distintos sistemas de control de l

  18. Realidad de los sistemas de gestión ambiental

    Sandra Constanza Escobar Cárdenas

    2009-07-01

    Full Text Available Este artículo presenta un análisis sobre la posibilidad de integrar los diferentes sistemas de gestión y la importancia que tiene los sistemas de gestión ambiental para el mejoramiento de las organizaciones. Luego de analizar comparativamente los modelos existentes, la autora presenta algunas recomendaciones de implementación.

  19. Teoría de sistemas (2008/09)

    Pla López, Rafael

    2008-01-01

    Conceptos fundamentales de la Teoría general de sistemas. Nociones básicas de estadística. Modelos cibernéticos. Sistemas caóticos.Asignatura optativa de Ciencias Ambientales. Primer ciclo. Segundo curso. Cuatrimestral: 6 créditos.

  20. Linearly Adjustable International Portfolios

    Fonseca, R. J.; Kuhn, D.; Rustem, B.

    2010-09-01

    We present an approach to multi-stage international portfolio optimization based on the imposition of a linear structure on the recourse decisions. Multiperiod decision problems are traditionally formulated as stochastic programs. Scenario tree based solutions however can become intractable as the number of stages increases. By restricting the space of decision policies to linear rules, we obtain a conservative tractable approximation to the original problem. Local asset prices and foreign exchange rates are modelled separately, which allows for a direct measure of their impact on the final portfolio value.

  1. Linearly Adjustable International Portfolios

    Fonseca, R. J.; Kuhn, D.; Rustem, B.

    2010-01-01

    We present an approach to multi-stage international portfolio optimization based on the imposition of a linear structure on the recourse decisions. Multiperiod decision problems are traditionally formulated as stochastic programs. Scenario tree based solutions however can become intractable as the number of stages increases. By restricting the space of decision policies to linear rules, we obtain a conservative tractable approximation to the original problem. Local asset prices and foreign exchange rates are modelled separately, which allows for a direct measure of their impact on the final portfolio value.

  2. Linear induction motor

    Barkman, W.E.; Adams, W.Q.; Berrier, B.R.

    1978-01-01

    A linear induction motor has been operated on a test bed with a feedback pulse resolution of 5 nm (0.2 μin). Slewing tests with this slide drive have shown positioning errors less than or equal to 33 nm (1.3 μin) at feedrates between 0 and 25.4 mm/min (0-1 ipm). A 0.86-m (34-in)-stroke linear motor is being investigated, using the SPACO machine as a test bed. Initial results were encouraging, and work is continuing to optimize the servosystem compensation

  3. Handbook of linear algebra

    Hogben, Leslie

    2013-01-01

    With a substantial amount of new material, the Handbook of Linear Algebra, Second Edition provides comprehensive coverage of linear algebra concepts, applications, and computational software packages in an easy-to-use format. It guides you from the very elementary aspects of the subject to the frontiers of current research. Along with revisions and updates throughout, the second edition of this bestseller includes 20 new chapters.New to the Second EditionSeparate chapters on Schur complements, additional types of canonical forms, tensors, matrix polynomials, matrix equations, special types of

  4. Linear Algebra Thoroughly Explained

    Vujičić, Milan

    2008-01-01

    Linear Algebra Thoroughly Explained provides a comprehensive introduction to the subject suitable for adoption as a self-contained text for courses at undergraduate and postgraduate level. The clear and comprehensive presentation of the basic theory is illustrated throughout with an abundance of worked examples. The book is written for teachers and students of linear algebra at all levels and across mathematics and the applied sciences, particularly physics and engineering. It will also be an invaluable addition to research libraries as a comprehensive resource book for the subject.

  5. SISTEMA DE ESGOTO DOMÉSTICO

    Thais Viviane Coimbra

    2017-02-01

    Full Text Available Há muito tempo a população sofre pela carência de programas de saneamento básico,o que acaba causando cada vez mais problemas para a população e para o meio ambiente, pois os efluentes acabam sendo despejados em corpos receptores. Sendo assim, uma solução seria desenvolver alternativas que auxilie no tratamento do esgoto, e que ainda satisfaça as necessidades da população. Portanto, a implantação de um sistema de tratamento de esgoto doméstico seria a alternativa ideal, pois garante um baixo custo de construção e uma excelente eficiência, minimizando assim grande parte dos problemas. Desse modo, com o  dimensionamento de um sistema composto por Fossa Séptica e Sumidouro para uma residência de pequeno porte é possível descrever suas funções e como é realizado o projeto através da norma NBR 7229/1993. Esse tipo de tratamento resultará em uma melhor qualidade dos recursos hídricos  e a qualidade de vida da população.

  6. Viviendas de bajo costo sistema SALVY

    Suárez Ibarra, Salvador

    1984-06-01

    Full Text Available The aim of this work is to offer an alternative for solving the current problem of housing, through a building system which has been developed and tested in our country — the SAL VY SYSTEM. It is directed towards solving the problem of low-cost housing with own technology, enabling these houses to be built quickly, using materials which are not traditional in building, but are abundant in our country. The house presented by us allows the user to extend its height according to his needs and financial possibilities, keeping the free area of the plot for so-called kitchen gardens.Este trabajo tiene como objetivo presentar una alternativa para la solución del problema actual de la vivienda, a través de un sistema constructivo desarrollado y experimentado en nuestro país —SISTEMA SALVY, dirigido a solucionar el problema de la vivienda de bajo costo, con una tecnología propia que permite la construcción de estas viviendas de una manera rápida, utilizando materiales no tradicionales en construcción, pero abundantes en nuestro país. La vivienda que presentamos permite al usuario ampliarla en altura, de acuerdo a sus necesidades y posibilidades económicas, manteniendo el área libre de la parcela para los denominados huertos del hogar.

  7. Evolución estelar en sistemas binarios

    De Vito, M. A.; Benvenuto, O.

    Definición y clasificación de sistemas binarios; descripción del comportamiento del sistema frente a la variación de su masa; binarias de rayos X; transferencia de masa en sistemas binarios masivos aplicado al posible esclarecimiento del progenitor azul de la supernova SN 1987A; comentario acerca de la evolución de enanas blancas de helio de baja masa y su conexión con los sistemas binarios; reseña del trabajo de Kippenhahn y Weigert sobre el cual está basado el código evolutivo desarrollado en la FCAG por el Dr. Benvenuto y sobre el cual se trabajará para poder incluir la evolución de una estrella con pérdida de masa perteneciente a un sistema binario.

  8. America, Linearly Cyclical

    2013-05-10

    AND VICTIM- ~ vAP BLAMING 4. AMERICA, LINEARLY CYCUCAL AF IMT 1768, 19840901, V5 PREVIOUS EDITION WILL BE USED. C2C Jessica Adams Dr. Brissett...his desires, his failings, and his aspirations follow the same general trend throughout history and throughout cultures. The founding fathers sought

  9. Stanford's linear collider

    Southworth, B.

    1985-01-01

    The peak of the construction phase of the Stanford Linear Collider, SLC, to achieve 50 GeV electron-positron collisions has now been passed. The work remains on schedule to attempt colliding beams, initially at comparatively low luminosity, early in 1987. (orig./HSI).

  10. Dosimetry of linear sources

    Mafra Neto, F.

    1992-01-01

    The dose of gamma radiation from a linear source of cesium 137 is obtained, presenting two difficulties: oblique filtration of radiation when cross the platinum wall, in different directions, and dose connection due to the scattering by the material mean of propagation. (C.G.C.)

  11. Resistors Improve Ramp Linearity

    Kleinberg, L. L.

    1982-01-01

    Simple modification to bootstrap ramp generator gives more linear output over longer sweep times. New circuit adds just two resistors, one of which is adjustable. Modification cancels nonlinearities due to variations in load on charging capacitor and due to changes in charging current as the voltage across capacitor increases.

  12. LINEAR COLLIDERS: 1992 workshop

    Settles, Ron; Coignet, Guy

    1992-01-01

    As work on designs for future electron-positron linear colliders pushes ahead at major Laboratories throughout the world in a major international collaboration framework, the LC92 workshop held in Garmisch Partenkirchen this summer, attended by 200 machine and particle physicists, provided a timely focus

  13. Linear genetic programming

    Brameier, Markus

    2007-01-01

    Presents a variant of Genetic Programming that evolves imperative computer programs as linear sequences of instructions, in contrast to the more traditional functional expressions or syntax trees. This book serves as a reference for researchers, but also contains sufficient introduction for students and those who are new to the field

  14. On Solving Linear Recurrences

    Dobbs, David E.

    2013-01-01

    A direct method is given for solving first-order linear recurrences with constant coefficients. The limiting value of that solution is studied as "n to infinity." This classroom note could serve as enrichment material for the typical introductory course on discrete mathematics that follows a calculus course.

  15. Review of linear colliders

    Takeda, Seishi

    1992-01-01

    The status of R and D of future e + e - linear colliders proposed by the institutions throughout the world is described including the JLC, NLC, VLEPP, CLIC, DESY/THD and TESLA projects. The parameters and RF sources are discussed. (G.P.) 36 refs.; 1 tab

  16. Control óptimo y robusto H∞ de sistemas no lineales aplicaciones a sistemas electromecánicos

    Vivas Venegas, Carlos

    2004-01-01

    La teoría de control automático ha experimentado un notable desarrollo en los últimos tiempos especialmente en el campo de los sistemas no lineales. Son aportaciones relativamente recientes los paradigmas de control basados en pasividad, teoría de sistema

  17. Finite-dimensional linear algebra

    Gockenbach, Mark S

    2010-01-01

    Some Problems Posed on Vector SpacesLinear equationsBest approximationDiagonalizationSummaryFields and Vector SpacesFields Vector spaces Subspaces Linear combinations and spanning sets Linear independence Basis and dimension Properties of bases Polynomial interpolation and the Lagrange basis Continuous piecewise polynomial functionsLinear OperatorsLinear operatorsMore properties of linear operatorsIsomorphic vector spaces Linear operator equations Existence and uniqueness of solutions The fundamental theorem; inverse operatorsGaussian elimination Newton's method Linear ordinary differential eq

  18. Linearity and Non-linearity of Photorefractive effect in Materials ...

    In this paper we have studied the Linearity and Non-linearity of Photorefractive effect in materials using the band transport model. For low light beam intensities the change in the refractive index is proportional to the electric field for linear optics while for non- linear optics the change in refractive index is directly proportional ...

  19. Linearly Refined Session Types

    Pedro Baltazar

    2012-11-01

    Full Text Available Session types capture precise protocol structure in concurrent programming, but do not specify properties of the exchanged values beyond their basic type. Refinement types are a form of dependent types that can address this limitation, combining types with logical formulae that may refer to program values and can constrain types using arbitrary predicates. We present a pi calculus with assume and assert operations, typed using a session discipline that incorporates refinement formulae written in a fragment of Multiplicative Linear Logic. Our original combination of session and refinement types, together with the well established benefits of linearity, allows very fine-grained specifications of communication protocols in which refinement formulae are treated as logical resources rather than persistent truths.

  20. Linear Water Waves

    Kuznetsov, N.; Maz'ya, V.; Vainberg, B.

    2002-08-01

    This book gives a self-contained and up-to-date account of mathematical results in the linear theory of water waves. The study of waves has many applications, including the prediction of behavior of floating bodies (ships, submarines, tension-leg platforms etc.), the calculation of wave-making resistance in naval architecture, and the description of wave patterns over bottom topography in geophysical hydrodynamics. The first section deals with time-harmonic waves. Three linear boundary value problems serve as the approximate mathematical models for these types of water waves. The next section uses a plethora of mathematical techniques in the investigation of these three problems. The techniques used in the book include integral equations based on Green's functions, various inequalities between the kinetic and potential energy and integral identities which are indispensable for proving the uniqueness theorems. The so-called inverse procedure is applied to constructing examples of non-uniqueness, usually referred to as 'trapped nodes.'

  1. The International Linear Collider

    List Benno

    2014-04-01

    Full Text Available The International Linear Collider (ILC is a proposed e+e− linear collider with a centre-of-mass energy of 200–500 GeV, based on superconducting RF cavities. The ILC would be an ideal machine for precision studies of a light Higgs boson and the top quark, and would have a discovery potential for new particles that is complementary to that of LHC. The clean experimental conditions would allow the operation of detectors with extremely good performance; two such detectors, ILD and SiD, are currently being designed. Both make use of novel concepts for tracking and calorimetry. The Japanese High Energy Physics community has recently recommended to build the ILC in Japan.

  2. The International Linear Collider

    List, Benno

    2014-04-01

    The International Linear Collider (ILC) is a proposed e+e- linear collider with a centre-of-mass energy of 200-500 GeV, based on superconducting RF cavities. The ILC would be an ideal machine for precision studies of a light Higgs boson and the top quark, and would have a discovery potential for new particles that is complementary to that of LHC. The clean experimental conditions would allow the operation of detectors with extremely good performance; two such detectors, ILD and SiD, are currently being designed. Both make use of novel concepts for tracking and calorimetry. The Japanese High Energy Physics community has recently recommended to build the ILC in Japan.

  3. Dimension of linear models

    Høskuldsson, Agnar

    1996-01-01

    Determination of the proper dimension of a given linear model is one of the most important tasks in the applied modeling work. We consider here eight criteria that can be used to determine the dimension of the model, or equivalently, the number of components to use in the model. Four...... the basic problems in determining the dimension of linear models. Then each of the eight measures are treated. The results are illustrated by examples....... of these criteria are widely used ones, while the remaining four are ones derived from the H-principle of mathematical modeling. Many examples from practice show that the criteria derived from the H-principle function better than the known and popular criteria for the number of components. We shall briefly review...

  4. Reciprocating linear motor

    Goldowsky, Michael P. (Inventor)

    1987-01-01

    A reciprocating linear motor is formed with a pair of ring-shaped permanent magnets having opposite radial polarizations, held axially apart by a nonmagnetic yoke, which serves as an axially displaceable armature assembly. A pair of annularly wound coils having axial lengths which differ from the axial lengths of the permanent magnets are serially coupled together in mutual opposition and positioned with an outer cylindrical core in axial symmetry about the armature assembly. One embodiment includes a second pair of annularly wound coils serially coupled together in mutual opposition and an inner cylindrical core positioned in axial symmetry inside the armature radially opposite to the first pair of coils. Application of a potential difference across a serial connection of the two pairs of coils creates a current flow perpendicular to the magnetic field created by the armature magnets, thereby causing limited linear displacement of the magnets relative to the coils.

  5. Duality in linearized gravity

    Henneaux, Marc; Teitelboim, Claudio

    2005-01-01

    We show that duality transformations of linearized gravity in four dimensions, i.e., rotations of the linearized Riemann tensor and its dual into each other, can be extended to the dynamical fields of the theory so as to be symmetries of the action and not just symmetries of the equations of motion. Our approach relies on the introduction of two superpotentials, one for the spatial components of the spin-2 field and the other for their canonically conjugate momenta. These superpotentials are two-index, symmetric tensors. They can be taken to be the basic dynamical fields and appear locally in the action. They are simply rotated into each other under duality. In terms of the superpotentials, the canonical generator of duality rotations is found to have a Chern-Simons-like structure, as in the Maxwell case

  6. The SLAC linear collider

    Phinney, N.

    1992-01-01

    The SLAC Linear Collider has begun a new era of operation with the SLD detector. During 1991 there was a first engineering run for the SLD in parallel with machine improvements to increase luminosity and reliability. For the 1992 run, a polarized electron source was added and more than 10,000 Zs with an average of 23% polarization have been logged by the SLD. This paper discusses the performance of the SLC in 1991 and 1992 and the technical advances that have produced higher luminosity. Emphasis will be placed on issues relevant to future linear colliders such as producing and maintaining high current, low emittance beams and focusing the beams to the micron scale for collisions. (Author) tab., 2 figs., 18 refs

  7. Linear waves and instabilities

    Bers, A.

    1975-01-01

    The electrodynamic equations for small-amplitude waves and their dispersion relation in a homogeneous plasma are outlined. For such waves, energy and momentum, and their flow and transformation, are described. Perturbation theory of waves is treated and applied to linear coupling of waves, and the resulting instabilities from such interactions between active and passive waves. Linear stability analysis in time and space is described where the time-asymptotic, time-space Green's function for an arbitrary dispersion relation is developed. The perturbation theory of waves is applied to nonlinear coupling, with particular emphasis on pump-driven interactions of waves. Details of the time--space evolution of instabilities due to coupling are given. (U.S.)

  8. Extended linear chain compounds

    Linear chain substances span a large cross section of contemporary chemistry ranging from covalent polymers, to organic charge transfer com­ plexes to nonstoichiometric transition metal coordination complexes. Their commonality, which coalesced intense interest in the theoretical and exper­ imental solid state physics/chemistry communities, was based on the obser­ vation that these inorganic and organic polymeric substrates exhibit striking metal-like electrical and optical properties. Exploitation and extension of these systems has led to the systematic study of both the chemistry and physics of highly and poorly conducting linear chain substances. To gain a salient understanding of these complex materials rich in anomalous aniso­ tropic electrical, optical, magnetic, and mechanical properties, the conver­ gence of diverse skills and talents was required. The constructive blending of traditionally segregated disciplines such as synthetic and physical organic, inorganic, and polymer chemistry, crystallog...

  9. LA INGENIERÍA DE SISTEMAS Y SU EVOLUCIÓN HACIA LA ARQUITECTURA DE SISTEMAS

    EDGAR SERNA MONTOYA

    2009-12-01

    Full Text Available Muchas de las empresas modernas entendieron que sus antiguas unidades de sistemas ya no son funcionales, y comienzan a subdividirlas en dos grupos de trabajo diferenciadores: el encargado de la infraestructura y el de los denominados “arquitectos de Sistemas”. Esta decisión lógica la inspira la actual evolución de la Ingeniería de Sistemas que, como área de conocimiento, genera los mismos subgrupos como agentes para formación. Además, la evolución y complejidad de lossistemas de información en medio de la sociedad del conocimiento, con exigencias y expectativas muy complejas, también determinan la necesidad de esta especialización. En este documento, una traducción casi literal de un white paper que publicó la empresa Quidnunc -www.quidnunc.com consultado en abril del año 2000- especializada en gestión de configuración, se detalla la importancia de esta división y las pautas a seguir a la hora de diseñar la arquitectura de sistemas de una empresa

  10. Talento emprendedor, inteligencia, creatividad y sistema educativo

    Mariano Gutiérrez Tapias

    2014-01-01

    Full Text Available En este artículo, pretendemos realizar un sencillo análisis de términos relacionados con el talento, el emprendimiento y la creatividad por entender que dichos conceptos deben estar presentes en aquellas sociedades que pretenden seguir creciendo en lo cultural, en lo social y en lo económico. Ya decía Einstein que es muy difícil encontrar niños que sigan siendo creativos al terminar la escuela. Este reto debe afrontarlo el sistema educativo si quiere ser de utilidad a la sociedad, favorecer personas críticas y creativas, con pensamientos divergentes, capaces de aprender y desaprender, de reinventarse varias veces a lo largo de su vida.

  11. Non-linear osmosis

    Diamond, Jared M.

    1966-01-01

    1. The relation between osmotic gradient and rate of osmotic water flow has been measured in rabbit gall-bladder by a gravimetric procedure and by a rapid method based on streaming potentials. Streaming potentials were directly proportional to gravimetrically measured water fluxes. 2. As in many other tissues, water flow was found to vary with gradient in a markedly non-linear fashion. There was no consistent relation between the water permeability and either the direction or the rate of water flow. 3. Water flow in response to a given gradient decreased at higher osmolarities. The resistance to water flow increased linearly with osmolarity over the range 186-825 m-osM. 4. The resistance to water flow was the same when the gall-bladder separated any two bathing solutions with the same average osmolarity, regardless of the magnitude of the gradient. In other words, the rate of water flow is given by the expression (Om — Os)/[Ro′ + ½k′ (Om + Os)], where Ro′ and k′ are constants and Om and Os are the bathing solution osmolarities. 5. Of the theories advanced to explain non-linear osmosis in other tissues, flow-induced membrane deformations, unstirred layers, asymmetrical series-membrane effects, and non-osmotic effects of solutes could not explain the results. However, experimental measurements of water permeability as a function of osmolarity permitted quantitative reconstruction of the observed water flow—osmotic gradient curves. Hence non-linear osmosis in rabbit gall-bladder is due to a decrease in water permeability with increasing osmolarity. 6. The results suggest that aqueous channels in the cell membrane behave as osmometers, shrinking in concentrated solutions of impermeant molecules and thereby increasing membrane resistance to water flow. A mathematical formulation of such a membrane structure is offered. PMID:5945254

  12. Fundamentals of linear algebra

    Dash, Rajani Ballav

    2008-01-01

    FUNDAMENTALS OF LINEAR ALGEBRA is a comprehensive Text Book, which can be used by students and teachers of All Indian Universities. The Text has easy, understandable form and covers all topics of UGC Curriculum. There are lots of worked out examples which helps the students in solving the problems without anybody's help. The Problem sets have been designed keeping in view of the questions asked in different examinations.

  13. Linear network theory

    Sander, K F

    1964-01-01

    Linear Network Theory covers the significant algebraic aspect of network theory, with minimal reference to practical circuits. The book begins the presentation of network analysis with the exposition of networks containing resistances only, and follows it up with a discussion of networks involving inductance and capacity by way of the differential equations. Classification and description of certain networks, equivalent networks, filter circuits, and network functions are also covered. Electrical engineers, technicians, electronics engineers, electricians, and students learning the intricacies

  14. Non linear viscoelastic models

    Agerkvist, Finn T.

    2011-01-01

    Viscoelastic eects are often present in loudspeaker suspensions, this can be seen in the displacement transfer function which often shows a frequency dependent value below the resonance frequency. In this paper nonlinear versions of the standard linear solid model (SLS) are investigated....... The simulations show that the nonlinear version of the Maxwell SLS model can result in a time dependent small signal stiness while the Kelvin Voight version does not....

  15. Relativistic Linear Restoring Force

    Clark, D.; Franklin, J.; Mann, N.

    2012-01-01

    We consider two different forms for a relativistic version of a linear restoring force. The pair comes from taking Hooke's law to be the force appearing on the right-hand side of the relativistic expressions: d"p"/d"t" or d"p"/d["tau"]. Either formulation recovers Hooke's law in the non-relativistic limit. In addition to these two forces, we…

  16. Superconducting linear colliders

    Anon.

    1990-01-01

    The advantages of superconducting radiofrequency (SRF) for particle accelerators have been demonstrated by successful operation of systems in the TRISTAN and LEP electron-positron collider rings respectively at the Japanese KEK Laboratory and at CERN. If performance continues to improve and costs can be lowered, this would open an attractive option for a high luminosity TeV (1000 GeV) linear collider

  17. Perturbed asymptotically linear problems

    Bartolo, R.; Candela, A. M.; Salvatore, A.

    2012-01-01

    The aim of this paper is investigating the existence of solutions of some semilinear elliptic problems on open bounded domains when the nonlinearity is subcritical and asymptotically linear at infinity and there is a perturbation term which is just continuous. Also in the case when the problem has not a variational structure, suitable procedures and estimates allow us to prove that the number of distinct crtitical levels of the functional associated to the unperturbed problem is "stable" unde...

  18. Miniature linear cooler development

    Pruitt, G.R.

    1993-01-01

    An overview is presented of the status of a family of miniature linear coolers currently under development by Hughes Aircraft Co. for use in hand held, volume limited or power limited infrared applications. These coolers, representing the latest additions to the Hughes family of TOP trademark [twin-opposed piston] linear coolers, have been fabricated and tested in three different configurations. Each configuration is designed to utilize a common compressor assembly resulting in reduced manufacturing costs. The baseline compressor has been integrated with two different expander configurations and has been operated with two different levels of input power. These various configuration combinations offer a wide range of performance and interface characteristics which may be tailored to applications requiring limited power and size without significantly compromising cooler capacity or cooldown characteristics. Key cooler characteristics and test data are summarized for three combinations of cooler configurations which are representative of the versatility of this linear cooler design. Configurations reviewed include the shortened coldfinger [1.50 to 1.75 inches long], limited input power [less than 17 Watts] for low power availability applications; the shortened coldfinger with higher input power for lightweight, higher performance applications; and coldfingers compatible with DoD 0.4 Watt Common Module coolers for wider range retrofit capability. Typical weight of these miniature linear coolers is less than 500 grams for the compressor, expander and interconnecting transfer line. Cooling capacity at 80K at room ambient conditions ranges from 400 mW to greater than 550 mW. Steady state power requirements for maintaining a heat load of 150 mW at 80K has been shown to be less than 8 Watts. Ongoing reliability growth testing is summarized including a review of the latest test article results

  19. Linear pneumatic actuator

    Avram Mihai

    2017-01-01

    Full Text Available The paper presents a linear pneumatic actuator with short working stroke. It consists of a pneumatic motor (a simple stroke cylinder or a membrane chamber, two 2/2 pneumatic distributors “all or nothing” electrically commanded for controlling the intake/outtake flow to/from the active chamber of the motor, a position transducer and a microcontroller. There is also presented the theoretical analysis (mathematical modelling and numerical simulation accomplished.

  20. Linear pneumatic actuator

    Avram Mihai; Niţu Constantin; Bucşan Constantin; Grămescu Bogdan

    2017-01-01

    The paper presents a linear pneumatic actuator with short working stroke. It consists of a pneumatic motor (a simple stroke cylinder or a membrane chamber), two 2/2 pneumatic distributors “all or nothing” electrically commanded for controlling the intake/outtake flow to/from the active chamber of the motor, a position transducer and a microcontroller. There is also presented the theoretical analysis (mathematical modelling and numerical simulation) accomplished.

  1. Linear MHD equilibria

    Scheffel, J.

    1984-03-01

    The linear Grad-Shafranov equation for a toroidal, axisymmetric plasma is solved analytically. Exact solutions are given in terms of confluent hyper-geometric functions. As an alternative, simple and accurate WKBJ solutions are presented. With parabolic pressure profiles, both hollow and peaked toroidal current density profiles are obtained. As an example the equilibrium of a z-pinch with a square-shaped cross section is derived.(author)

  2. Linear induction accelerator

    Buttram, M.T.; Ginn, J.W.

    1988-06-21

    A linear induction accelerator includes a plurality of adder cavities arranged in a series and provided in a structure which is evacuated so that a vacuum inductance is provided between each adder cavity and the structure. An energy storage system for the adder cavities includes a pulsed current source and a respective plurality of bipolar converting networks connected thereto. The bipolar high-voltage, high-repetition-rate square pulse train sets and resets the cavities. 4 figs.

  3. Defesa dos direitos humanos: sistemas regionais

    Hélio Bicudo

    2003-04-01

    Full Text Available O texto discorre sobre a institucionalização dos sistemas de promoção dos Direitos Humanos, ao longo do século XX. Tomando a Declaração Universal dos Direitos do Homem, de 1948, como base e ponto de partida, o articulista aborda as três principais vertentes dos sistemas de promoção desses direitos: a européia, a americana e a africana. A evolução de cada uma delas descrita analógica e epistemologicamente, de forma a salientar singularidades sem perder de vista as influências recíprocas ou mesmo as determinantes próprias do contexto espaço-social. Para finalizar, o articulista destaca a importância do Tribunal Penal Internacional no estabelecimento de uma justiça ecumênica. Concomitantemente, alerta para o perigo contido na ameaça de os EUA não o ratificarem.The text underlines the institutional character acquired by the main systems to promote Human Rights in the twentieth century. Taking the Universal Human Rigths Declaration, of 1948, as the basis for analysis, the author brings up three different approaches to promote these rights: the European, the American and the African. The evolution of each of them is described using its procedure as a basic reference. Besides, an analogical analysis, brings to the fore singularities, without ignoring reciprocal influences dictated by particular contexts, though. The author stresses the importance of the International Penal Court, as a means to establish ecumenical justice. At the same time, he reminds the reader of the risks implicit in the possible non-ratification of the IPC by United States.

  4. Linear algebraic groups

    Springer, T A

    1998-01-01

    "[The first] ten chapters...are an efficient, accessible, and self-contained introduction to affine algebraic groups over an algebraically closed field. The author includes exercises and the book is certainly usable by graduate students as a text or for self-study...the author [has a] student-friendly style… [The following] seven chapters... would also be a good introduction to rationality issues for algebraic groups. A number of results from the literature…appear for the first time in a text." –Mathematical Reviews (Review of the Second Edition) "This book is a completely new version of the first edition. The aim of the old book was to present the theory of linear algebraic groups over an algebraically closed field. Reading that book, many people entered the research field of linear algebraic groups. The present book has a wider scope. Its aim is to treat the theory of linear algebraic groups over arbitrary fields. Again, the author keeps the treatment of prerequisites self-contained. The material of t...

  5. Parametric Linear Dynamic Logic

    Peter Faymonville

    2014-08-01

    Full Text Available We introduce Parametric Linear Dynamic Logic (PLDL, which extends Linear Dynamic Logic (LDL by temporal operators equipped with parameters that bound their scope. LDL was proposed as an extension of Linear Temporal Logic (LTL that is able to express all ω-regular specifications while still maintaining many of LTL's desirable properties like an intuitive syntax and a translation into non-deterministic Büchi automata of exponential size. But LDL lacks capabilities to express timing constraints. By adding parameterized operators to LDL, we obtain a logic that is able to express all ω-regular properties and that subsumes parameterized extensions of LTL like Parametric LTL and PROMPT-LTL. Our main technical contribution is a translation of PLDL formulas into non-deterministic Büchi word automata of exponential size via alternating automata. This yields a PSPACE model checking algorithm and a realizability algorithm with doubly-exponential running time. Furthermore, we give tight upper and lower bounds on optimal parameter values for both problems. These results show that PLDL model checking and realizability are not harder than LTL model checking and realizability.

  6. Quantum linear Boltzmann equation

    Vacchini, Bassano; Hornberger, Klaus

    2009-01-01

    We review the quantum version of the linear Boltzmann equation, which describes in a non-perturbative fashion, by means of scattering theory, how the quantum motion of a single test particle is affected by collisions with an ideal background gas. A heuristic derivation of this Lindblad master equation is presented, based on the requirement of translation-covariance and on the relation to the classical linear Boltzmann equation. After analyzing its general symmetry properties and the associated relaxation dynamics, we discuss a quantum Monte Carlo method for its numerical solution. We then review important limiting forms of the quantum linear Boltzmann equation, such as the case of quantum Brownian motion and pure collisional decoherence, as well as the application to matter wave optics. Finally, we point to the incorporation of quantum degeneracies and self-interactions in the gas by relating the equation to the dynamic structure factor of the ambient medium, and we provide an extension of the equation to include internal degrees of freedom.

  7. The Stanford Linear Collider

    Emma, P.

    1995-01-01

    The Stanford Linear Collider (SLC) is the first and only high-energy e + e - linear collider in the world. Its most remarkable features are high intensity, submicron sized, polarized (e - ) beams at a single interaction point. The main challenges posed by these unique characteristics include machine-wide emittance preservation, consistent high intensity operation, polarized electron production and transport, and the achievement of a high degree of beam stability on all time scales. In addition to serving as an important machine for the study of Z 0 boson production and decay using polarized beams, the SLC is also an indispensable source of hands-on experience for future linear colliders. Each new year of operation has been highlighted with a marked improvement in performance. The most significant improvements for the 1994-95 run include new low impedance vacuum chambers for the damping rings, an upgrade to the optics and diagnostics of the final focus systems, and a higher degree of polarization from the electron source. As a result, the average luminosity has nearly doubled over the previous year with peaks approaching 10 30 cm -2 s -1 and an 80% electron polarization at the interaction point. These developments as well as the remaining identifiable performance limitations will be discussed

  8. Sistemas de tiempo real en situaciones de sobrecarga

    Pérez Almansa, Jordi

    2005-01-01

    En el proyecto presentado en esta memoria se estudia el análisis de sistemas de tiempo real en los que se debe verificar el cumplimiento de ciertos requerimientos temporales, principalmente referidos a plazos máximos de ejecución. El análisis de estos requerimientos se basa en el estudio de la Calidad de Control del sistema, es decir, observar como responde el sistema cuando tiene situaciones de sobrecarga. El análisis y diseño en tiempo real se trata de una tarea compleja, que requiere la...

  9. Sistemas integrados de gestión (SIG)

    García Pantigozo, Manuel; Quispe Atúncar, Carlos; Ráez Guevara, Luis

    2014-01-01

    La cultura de la normalización es necesaria para competir globalmente, y para esto la ISO ha elaborado una serie de sistemas de gestión orientados a las calidad, medio ambiente, seguridad en el trabajo y recursos humanos, esto significa la necesidad de integrar sistemas mediante el Sistema integrado de Gestión - SIG The culture of standardization is necessary to compete globally, and to this ISO has developed a number of management systems geared to quality, environment, occupational safe...

  10. Sistemas de reconocimiento basados en la imagen facial

    Arguello Fuentes, Henry

    2012-01-01

    Este artículo sintetiza las principales investigaciones que se están llevando a cabo en el área de los sistemas de reconocimiento a través de la imagen facial. Se realiza la descripción de las principales líneas de trabajo en los sistema de identificación de personas por medio de la imagen del rostro. Además, se realiza una síntesis de las últimas técnicas matemáticas para realizar la extracción de características dentro de estos sistemas de identificación.

  11. MODELADO Y SIMULACIÓN DE SISTEMAS MECATRÓNICOS

    Mauricio Castillo Effen

    2004-01-01

    Full Text Available En este artículo se introduce el campo de la mecatrónica, su importancia y relación con los sistemas embebidos, procediendo luego a mostrar algunos retos que representa la tarea de modelar y simular sistemas mecatrónicos. Se presentan también algunos paradigmas de modelación y simulación de sistemas de éste tipo así como alternativas prácticas de cómo encarar los retos mencionados.

  12. Análisis de sistemas de distribución radiales bajo condiciones de polución armónica

    Ramón Alfonso Gallego Rendón

    2005-11-01

    Full Text Available Los sistemas de distribución presentan un alto contenido de armónicos debido a la presencia de cargas no lineales tales como equipos electrónicos y elementos ferromagnéticos en saturación. El análisis de este tipo de sistemas es el objetivo del flujo de carga armónico. En este artículo se muestra una metodología de flujo de carga armónico adaptado a los sistemas de distribución dadas las particularidades propias de estos sistemas como es la topología radial. Igualmente se muestra una implementación computacional desarrollada bajo el esquema de programación orientada a objetos usando el sistema operativo Windows. Se presentan ejemplos de prueba IEEE. / Distribution systems can present a high harmonic level due to existence of non linear loads such as electronic equipment. The analysis of these systems is the objective of harmonic load flow. This document shows a new methodology of harmonic load flow which considers the distribution systems characteristics. Likewise it shows an object oriented software developed in Windows. IEEE test systems are presented.

  13. Non linear microtearing modes

    Garbet, X.; Mourgues, F.; Samain, A.

    1987-01-01

    Among the various instabilities which could explain the anomalous electron heat transport observed in tokamaks during additional heating, a microtearing turbulence is a reasonable candidate since it affects directly the magnetic topology. This turbulence may be described in a proper frame rotating around the majors axis by a static potential vector. In strong non linear regimes, the flow of electrons along the stochastic field lines induces a current. The point is to know whether this current can sustain the turbulence. The mechanisms of this self-consistency, involving the combined effects of the thermal diamagnetism and of the electric drift are presented here

  14. RF linear accelerators

    Wangler, Thomas P

    2008-01-01

    Thomas P. Wangler received his B.S. degree in physics from Michigan State University, and his Ph.D. degree in physics and astronomy from the University of Wisconsin. After postdoctoral appointments at the University of Wisconsin and Brookhaven National Laboratory, he joined the staff of Argonne National Laboratory in 1966, working in the fields of experimental high-energy physics and accelerator physics. He joined the Accelerator Technology Division at Los Alamos National Laboratory in 1979, where he specialized in high-current beam physics and linear accelerator design and technology. In 2007

  15. SLAC linear collider

    Richter, B.; Bell, R.A.; Brown, K.L.

    1980-06-01

    The SLAC LINEAR COLLIDER is designed to achieve an energy of 100 GeV in the electron-positron center-of-mass system by accelerating intense bunches of particles in the SLAC linac and transporting the electron and positron bunches in a special magnet system to a point where they are focused to a radius of about 2 microns and made to collide head on. The rationale for this new type of colliding beam system is discussed, the project is described, some of the novel accelerator physics issues involved are discussed, and some of the critical technical components are described

  16. Matlab linear algebra

    Lopez, Cesar

    2014-01-01

    MATLAB is a high-level language and environment for numerical computation, visualization, and programming. Using MATLAB, you can analyze data, develop algorithms, and create models and applications. The language, tools, and built-in math functions enable you to explore multiple approaches and reach a solution faster than with spreadsheets or traditional programming languages, such as C/C++ or Java. MATLAB Linear Algebra introduces you to the MATLAB language with practical hands-on instructions and results, allowing you to quickly achieve your goals. In addition to giving an introduction to

  17. Sistemas integrados de gestão empresarial: estudos de casos de implementação de sistemas ERP.

    Cesar Alexandre de Souza

    2000-01-01

    Este trabalho é um estudo das características dos sistemas ERP (Enterprise Resource Planning), de seus processos de escolha, implementação e utilização, de seus benefícios, suas desvantagens e de seus possíveis impactos nas organizações. No levantamento bibliográfico, são apresentados conceitos relacionados aos sistemas ERP, bem como uma proposta de modelo de ciclo para estes sistemas, com a finalidade de estudar suas diferentes etapas na empresa, procurando estabelecer em cada uma delas qua...

  18. Evaluación y Medida de Sistemas de Aprendizaje en Ambientes Colaborativos

    Vega Rodríguez, Pamela M.; Aguilar Carranza, Kathia M.; Paredes Velasco, Maximiliano

    2011-01-01

    La evaluación del sistema de aprendizaje se realiza en base a ciertos criterios y variables que permiten cuantificar, obtener resultados y determinar ventajas y desventajas frente a otro sistema. La evaluación permite verificar que un sistema colaborativo de aprendizaje cumple con los objetivos deseados. En este informe se presenta una revisión de estudios sobre los sistemas de aprendizaje colaborativo y posteriormente una propuesta de evaluación. Lenguajes y Sistemas Inform...

  19. Special set linear algebra and special set fuzzy linear algebra

    Kandasamy, W. B. Vasantha; Smarandache, Florentin; Ilanthenral, K.

    2009-01-01

    The authors in this book introduce the notion of special set linear algebra and special set fuzzy Linear algebra, which is an extension of the notion set linear algebra and set fuzzy linear algebra. These concepts are best suited in the application of multi expert models and cryptology. This book has five chapters. In chapter one the basic concepts about set linear algebra is given in order to make this book a self contained one. The notion of special set linear algebra and their fuzzy analog...

  20. Sistemas adhesivos en Odontología Restauradora

    María Natalia Mandri

    Full Text Available Los sistemas adhesivos actuales han permitido mejorar los procedimientos clínicos tanto en la evolución de los componentes y su mecanismo de acción, como en la disminución del tiempo operatorio de aplicación de cada uno de ellos, brindando una eficacia clínica aceptable y predecible. Esta demanda de efectividad, ha dado lugar a una gran variedad de sistemas adhesivos, que en muchas ocasiones, no se emplean en la práctica profesional. El propósito de este trabajo es realizar una revisión de los sistemas adhesivos a fin de brindar la información necesaria y secuencia de aplicación, que permita al odontólogo realizar una adecuada selección y utilización del sistema, de acuerdo a la situación clínica

  1. Inmunología tumoral y neoplasias del sistema inmune

    Sen Fernández, María Luz de la; Sempere Ortells, José Miguel; Marco, Francisco M.; Vázquez Araujo, Begoña

    2012-01-01

    Inmunología tumoral: vigilancia inmunológica, antígenos tumorales, respuesta inmune antitumoral, escape tumoral. Inmunología y diagnóstico. Inmunoterapia. Neoplasias del sistema inmune: leucemias y linfomas.

  2. Nuevos sistemas de frecuencia intermedia para el IAR

    Olalde, J. C.; Perilli, D.; Larrarte, J. J.

    Se presenta el diagrama en bloques de los nuevos sistemas de Frecuencia Intermedia para los dos radiómetros instalados en el IAR. Entre las características más importantes del sistema podemos mencionar la posibilidad de conectar cualquiera de las dos antenas a los ``backend" disponibles: analizador espectral de alta resolución (META II) de 0,05 Hz, autocorrelador de 1008 canales y contínuo. Se incorporan al sistema nuevos sintetizadores de frecuencia implementados con PLL y la moderna técnica de síntesis digital directa. Por último, el conjunto del sistema es susceptible de ser configurado por las computadoras de adquisición de datos, supervisadas por otra, que entrega el estado de funcionamiento actual y evita la selección de configuraciones incorrectas por parte del usuario.

  3. Electrodynamic linear motor

    Munehiro, H

    1980-05-29

    When driving the carriage of a printer through a rotating motor, there are problems regarding the limited accuracy of the carriage position due to rotation or contraction and ageing of the cable. In order to solve the problem, a direct drive system was proposed, in which the printer carriage is driven by a linear motor. If one wants to keep the motor circuit of such a motor compact, then the magnetic flux density in the air gap must be reduced or the motor travel must be reduced. It is the purpose of this invention to create an electrodynamic linear motor, which on the one hand is compact and light and on the other hand has a relatively high constant force over a large travel. The invention is characterised by the fact that magnetic fields of alternating polarity are generated at equal intervals in the magnetic field, and that the coil arrangement has 2 adjacent coils, whose size corresponds to half the length of each magnetic pole. A logic circuit is provided to select one of the two coils and to determine the direction of the current depending on the signals of a magnetic field sensor on the coil arrangement.

  4. Linear wind generator

    Kozarov, A.; Petrov, O.; Antonov, J.; Sotirova, S.; Petrova, B.

    2006-01-01

    The purpose of the linear wind-power generator described in this article is to decrease the following disadvantages of the common wind-powered turbine: 1) large bending and twisting moments to the blades and the shaft, especially when strong winds and turbulence exist; 2) significant values of the natural oscillation period of the construction result in the possibility of occurrence of destroying resonance oscillations; 3) high velocity of the peripheral parts of the rotor creating a danger for birds; 4) difficulties, connected with the installation and the operation on the mountain ridges and passages where the wind energy potential is the largest. The working surfaces of the generator in questions driven by the wind are not connected with a joint shaft but each moves along a railway track with few oscillations. So the sizes of each component are small and their number can be rather large. The mechanical trajectory is not a circle but a closed outline in a vertical plain, which consists of two rectilinear sectors, one above the other, connected in their ends by semi-circumferences. The mechanical energy of each component turns into electrical on the principle of the linear electrical generator. A regulation is provided when the direction of the wind is perpendicular to the route. A possibility of effectiveness is shown through aiming of additional quantities of air to the movable components by static barriers

  5. Envejecimiento del sistema cardiovascular Cardiovascular system aging

    José M Ocampo

    2005-08-01

    Full Text Available El envejecimiento del sistema cardiovascular está asociado con un número característico de cambios a nivel bioquímico, histológico y morfológico. Sin embargo, no todas las modificaciones presentadas se asocian con deterioro en la función. Entre los cambios a nivel cardiaco se tienen: disminución en el número de miocitos y en las células del sistema de conducción cardiaca, desarrollo de fibrosis, cambios en el transporte de calcio a través de las membranas y disminución del cronotropismo, inotropismo y lusitropismo mediados por estímulo b-adrenérgico. A nivel vascular, hay incremento en la rigidez de la pared de las arterias, con aumento en la velocidad de la onda de pulso, disfunción endotelial y disminución de la vasodilatación mediada por estímulo b-adrenérgico. Durante el reposo el sistema cardiovascular es capaz de desarrollar mecanismos adaptativos eficientes, pero en situaciones de estrés como el ejercicio, los cambios asociados con el envejecimiento se hacen evidentes ya que está disminuida la capacidad para obtener la frecuencia cardiaca máxima, está incrementada la postcarga y hay disminución de la contractilidad intrínseca. Por lo anterior, los ancianos deben utilizar al máximo el mecanismo de Frank-Starling para mantener el gasto cardiaco. Los cambios estructurales y funcionales asociados con el envejecimiento cardiovascular, disminuyen de forma significativa el umbral en el cual las enfermedades cardiacas llegan a ser evidentes, y deben ser conocidos por el personal de salud encargado de cuidar a los ancianos.Cardiovascular aging is associated with characteristic biochemical, histological and morphological changes. Nevertheless, these changes are not necessarily associated to a deterioration in its function. Among the cardiac changes found, there is a reduction in the number of myocytes and of the cardiac conduction system cells, development of fibrosis, changes in the trans-membrane calcium transport and a

  6. Implantación del sistema ERP SAP R/3

    Muñoz Fernandez, Jorge Juan

    2012-01-01

    El objetivo del presente trabajo ha sido realizar un estudio de investigación y desarrollo sobre la implantación del sistema Enterprise Resource Planning (ERP) SAP R/3 de una empresa. L'objectiu d'aquest treball final de carrera ha estat realitzar un estudi d'investigació i desenvolupament sobre la implantació del sistema Enterprise Resource Planning (ERP) SAP R/3 d'una empresa.

  7. Inmunosenescencia: efectos de la edad sobre el sistema inmune

    Saavedra Hernández, Danay; García Verdecia, Beatriz

    2014-01-01

    El proceso de envejecimiento provoca cambios en el sistema inmune que afectan su funcionamiento y desarrollo. Estos cambios pueden manifestarse desde la linfopoyesis hasta la respuesta que orquesta el sistema inmune frente a determinada enfermedad o agente infeccioso. Ambas ramas de la inmunidad, innata y adaptativa, se afectan en este proceso, lo que genera un impacto negativo en la respuesta inmune de los ancianos y los predispone a padecer enfermedades infecciosas, cáncer, autoinmunidad y ...

  8. El riego por chorro intermitente: un sistema prometedor

    Hernando Buriticá

    1981-07-01

    Full Text Available A través de la historia el hombre se ha ingeniado varios sistemas para suplir las deficiencias de agua que las condiciones naturales de clima han impuesto para el desarrollo de la agricultura: desvió ríos, construyó canales y reservorios y entregó el agua a los cultivos empleando variados sistemas de riego. En este caso haremos referencia al riego por chorro intermitente.

  9. Uma contribuição aos sistemas de custeio

    Neves, Luiz Carlos

    2010-01-01

    Apresenta um modelo de sistema de custeio, que observa as vantagens dos sistemas de custeio direto e custeio por absorção. Aborda as origens da contabilidade e sua evolução até o surgimento da contabilidade de custos. Tece considerações a respeito dos métodos de custeio existentes. Ilustra, com apresentação de exemplos numéricos, o modelo de custeio proposto

  10. Smart: sistemas multi-agente robótico

    JOVANI ALBERTO JIMÉNEZ BUILES

    2008-01-01

    Full Text Available El siguiente artículo busca dar una visión global de los Sistemas Multi-Agentes Robóticos (MARS mediante una explicación de las áreas relacionadas con el tema para luego presentar el Sistema Multi-Agente Robótico (SMART. SMART es un enjambre inteligente conformado por un robot nodriza y tres robot tipo baliza (guías que navegan de manera colaborativa un escenario estructurado.

  11. Estratégias para luz natural: sistemas inovadores.

    Juliana Saiter Garrocho

    2007-07-01

    Full Text Available Diversos sistemas, estratégias e componentesinovadores de alta tecnologia paraa otimização do uso da luz natural noprojeto de arquitetura têm se desenvolvidoatualmente, principalmente na EuropaCentral, nos Estados Unidos e na Austrália.Este artigo apresenta algumas dessasestratégias descrevendo suas principaiscaracterísticas. Palavras-chave: luz natural, estratégias deprojeto, sistemas inovadores de alta tecnologia.

  12. Sistemas de serviços de saúde: principais tipologias e suas relações com os sistema de saúde brasileiro

    José Patrício Bispo Júnior; Kelly Leite Maia de Messias

    2005-01-01

    O presente artigo discute as principais características dos Sistemas de Serviços de Saúde e relaciona o Sistema de Saúde Brasileiro com os três principais tipos de Sistemas de Serviços de Saúde. Conceitua e diferencia Sistema de Saúde de Sistemas de Serviços de Saúde. Apresenta a conformação, objetivos, componentes, características e funções dos Sistemas de Serviços de Saúde. Apresenta e discute os três principais tipos de Sistemas de Serviços de Saúde: Sistema de Saúde de Dominância de Me...

  13. Linearization of the Lorenz system

    Li, Chunbiao; Sprott, Julien Clinton; Thio, Wesley

    2015-01-01

    A partial and complete piecewise linearized version of the Lorenz system is proposed. The linearized versions have an independent total amplitude control parameter. Additional further linearization leads naturally to a piecewise linear version of the diffusionless Lorenz system. A chaotic circuit with a single amplitude controller is then implemented using a new switch element, producing a chaotic oscillation that agrees with the numerical calculation for the piecewise linear diffusionless Lorenz system. - Highlights: • A partial and complete piecewise linearized version of the Lorenz system are addressed. • The linearized versions have an independent total amplitude control parameter. • A piecewise linear version of the diffusionless Lorenz system is derived by further linearization. • A corresponding chaotic circuit without any multiplier is implemented for the chaotic oscillation

  14. Topics in computational linear optimization

    Hultberg, Tim Helge

    2000-01-01

    Linear optimization has been an active area of research ever since the pioneering work of G. Dantzig more than 50 years ago. This research has produced a long sequence of practical as well as theoretical improvements of the solution techniques avilable for solving linear optimization problems...... of high quality solvers and the use of algebraic modelling systems to handle the communication between the modeller and the solver. This dissertation features four topics in computational linear optimization: A) automatic reformulation of mixed 0/1 linear programs, B) direct solution of sparse unsymmetric...... systems of linear equations, C) reduction of linear programs and D) integration of algebraic modelling of linear optimization problems in C++. Each of these topics is treated in a separate paper included in this dissertation. The efficiency of solving mixed 0-1 linear programs by linear programming based...

  15. Linearization of the Lorenz system

    Li, Chunbiao, E-mail: goontry@126.com [School of Electronic & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044 (China); Engineering Technology Research and Development Center of Jiangsu Circulation Modernization Sensor Network, Jiangsu Institute of Commerce, Nanjing 211168 (China); Sprott, Julien Clinton [Department of Physics, University of Wisconsin–Madison, Madison, WI 53706 (United States); Thio, Wesley [Department of Electrical and Computer Engineering, The Ohio State University, Columbus, OH 43210 (United States)

    2015-05-08

    A partial and complete piecewise linearized version of the Lorenz system is proposed. The linearized versions have an independent total amplitude control parameter. Additional further linearization leads naturally to a piecewise linear version of the diffusionless Lorenz system. A chaotic circuit with a single amplitude controller is then implemented using a new switch element, producing a chaotic oscillation that agrees with the numerical calculation for the piecewise linear diffusionless Lorenz system. - Highlights: • A partial and complete piecewise linearized version of the Lorenz system are addressed. • The linearized versions have an independent total amplitude control parameter. • A piecewise linear version of the diffusionless Lorenz system is derived by further linearization. • A corresponding chaotic circuit without any multiplier is implemented for the chaotic oscillation.

  16. Tecnologias e sistemas de tratamento para os dejetos da suinocultura

    Leandro D. dos Santos

    2015-03-01

    Full Text Available A suinocultura caracteriza-se como uma atividade de alto impacto ambiental, devido a grande quantidade de dejetos com alta carga de poluentes, lançados no meio ambiente. No entanto, existem diversas tecnologias, e sistemas de tratamento, com a capacidade de reduzir o poder poluente dos dejetos da suinocultura. O presente trabalho tem como objetivo analisar as principais tecnologias e sistemas de tratamentos para os dejetos da suinocultura, presentes em publicações brasileiras. Os resultados obtidos nestas publicações apresentaram-se de certa forma satisfatórios em relação à redução da carga de poluentes dos efluentes da suinocultura. Entretanto, pouco se sabe sobre o comportamento da redução dos poluentes em função de parâmetros dimensionais e temporais das tecnologias ou dos sistemas de tratamento. Tal desconhecimento dificulta o dimensionamento de sistemas de tratamento, desconsiderando a relação existente entre investimento e redução do poder poluente dos dejetos. Dentro deste contexto, a modelagem e otimização de sistemas pode ser uma ferramenta muito útil para o dimensionamento de tecnologias e sistemas de tratamento de dejetos de suínos.

  17. On the linear programming bound for linear Lee codes.

    Astola, Helena; Tabus, Ioan

    2016-01-01

    Based on an invariance-type property of the Lee-compositions of a linear Lee code, additional equality constraints can be introduced to the linear programming problem of linear Lee codes. In this paper, we formulate this property in terms of an action of the multiplicative group of the field [Formula: see text] on the set of Lee-compositions. We show some useful properties of certain sums of Lee-numbers, which are the eigenvalues of the Lee association scheme, appearing in the linear programming problem of linear Lee codes. Using the additional equality constraints, we formulate the linear programming problem of linear Lee codes in a very compact form, leading to a fast execution, which allows to efficiently compute the bounds for large parameter values of the linear codes.

  18. Sistema de ayuda visual para apoyar aprendizaje de fonemas españoles

    Enrique San Juan Urrutia

    2013-04-01

    Full Text Available El presente trabajo  tiene como propósito  mostrar un sistema computacional con la capacidad de apoyar el aprendizaje de la  pronunciación de un conjunto determinado de fonemas españoles, dirigido a personas sordas o con dificultades auditivas, que tienen como consecuencia trastornos del habla. La posibilidad de “ver lo que se dice”, puede resultar  muy útil como método para la implantación y rehabilitación del Habla. Visualizar de forma inmediata, mediante una gráfica, los perfiles acústicos de los principales parámetros de la señal de voz y asociarlos con imágenes que representan lo dicho, ha resultado una alternativa adicional muy estimulante en el campo de la Foniatría. Dicho sistema basa su  funcionamiento en la extracción y comparación de parámetros fundamentales de las señales de voz, entre los cuales se puede mencionar los LPC (Linear Predictive Coding, Formantes y  coeficientes Ceptrales en la escala de frecuencias de Mel (Mel-frequency cepstral coefficients, MFCCs.  Se espera que el sistema constituya una  herramienta  de apoyo a la rehabilitación de trastornos del habla, reemplazando el canal de realimentación auditivo por un canal de realimentación visual. Es decir, mediante gráficas de los perfiles acústicos y principales parámetros característicos de la señal de voz, con imágenes e indicadores de  avance, se estructura en conjunto una importante herramienta alternativa adicional para la rehabilitación en trastornos del habla.

  19. Sistemas de vigilancia de riesgos ambientales para la salud. Sistemas de toxicovigilancia

    Ana Ferrer Dufol

    2004-12-01

    Full Text Available Se presenta el estudio de la Sección de Toxicología Clínica, sobre vigilancia epidemiológica en los Servicios de Urgencias, que tienen como causa intoxicaciones por productos químicos en el periodo de 1999-2003 y dentro del convenio de Asociación Española de Toxicología (AETOX con el Ministerio de Sanidad y Consumo; trabajo presentado en el Congreso Nacional de Medio Ambiente (CONAMA en el Grupo de trabajo “Sistemas de Vigilancia de Riesgos Ambientales para la Salud”.

  20. Un caso di confine incerto tra citazione e testimone nel “De dictione singulari” di Erodiano

    Laura Carrara

    2011-06-01

    Full Text Available In some cases, the distinctive features of ancient Greek literary quotations that are used for purely grammatical purposes (brevity, indifference towards content and metrical completeness can make it difficult to identify the beginning and/or the end of the quotation itself. Thus, the extremities of these quotations end up merging with the surrounding words. Linguistic and stylistic analysis of the quoted author and, in particular, of the quoting author (who is generally less known can provide the tools to solve this impasse. From this perspective, this article examines the case of a Sophoclean fragment (Soph. fr. 392 R. quoted by De dictione singulari by Herodian, where the lower limit is difficult to determine.

  1. Introduction to linear elasticity

    Gould, Phillip L

    2013-01-01

    Introduction to Linear Elasticity, 3rd Edition, provides an applications-oriented grounding in the tensor-based theory of elasticity for students in mechanical, civil, aeronautical, and biomedical engineering, as well as materials and earth science. The book is distinct from the traditional text aimed at graduate students in solid mechanics by introducing the subject at a level appropriate for advanced undergraduate and beginning graduate students. The author's presentation allows students to apply the basic notions of stress analysis and move on to advanced work in continuum mechanics, plasticity, plate and shell theory, composite materials, viscoelasticity and finite method analysis. This book also:  Emphasizes tensor-based approach while still distilling down to explicit notation Provides introduction to theory of plates, theory of shells, wave propagation, viscoelasticity and plasticity accessible to advanced undergraduate students Appropriate for courses following emerging trend of teaching solid mechan...

  2. Linear step drive

    Haniger, L.; Elger, R.; Kocandrle, L.; Zdebor, J.

    1986-01-01

    A linear step drive is described developed in Czechoslovak-Soviet cooperation and intended for driving WWER-1000 control rods. The functional principle is explained of the motor and the mechanical and electrical parts of the drive, power control, and the indicator of position are described. The motor has latches situated in the reactor at a distance of 3 m from magnetic armatures, it has a low structural height above the reactor cover, which suggests its suitability for seismic localities. Its magnetic circuits use counterpoles; the mechanical shocks at the completion of each step are damped using special design features. The position indicator is of a special design and evaluates motor position within ±1% of total travel. A drive diagram and the flow chart of both the control electronics and the position indicator are presented. (author) 4 figs

  3. Linear pulse amplifier

    Tjutju, R.L.

    1977-01-01

    Pulse amplifier is standard significant part of spectrometer. Apart from other type of amplification, it's a combination of amplification and pulse shaping. Because of its special purpose the device should fulfill the following : High resolution is desired to gain a high yield comparable to its actual state of condition. High signal to noise is desired to nhν resolution. High linearity to facilitate calibration. A good overload recovery, in order to the device will capable of analizing a low energy radiation which appear joinly on the high energy fields. Other expections of the device are its economical and practical use its extentive application. For that reason it's built on a standard NIM principle. Taking also into account the above mentioned considerations. High quality component parts are used throughout, while its availability in the domestic market is secured. (author)

  4. Linear Accelerator Laboratory

    1976-01-01

    This report covers the activity of the Linear Accelerator Laboratory during the period June 1974-June 1976. The activity of the Laboratory is essentially centered on high energy physics. The main activities were: experiments performed with the colliding rings (ACO), construction of the new colliding rings and beginning of the work at higher energy (DCI), bubble chamber experiments with the CERN PS neutrino beam, counter experiments with CERN's PS and setting-up of equipment for new experiments with CERN's SPS. During this period a project has also been prepared for an experiment with the new PETRA colliding ring at Hamburg. On the other hand, intense collaboration with the LURE Laboratory, using the electron synchrotron radiation emitted by ACO and DCI, has been developed [fr

  5. HEAVY ION LINEAR ACCELERATOR

    Van Atta, C.M.; Beringer, R.; Smith, L.

    1959-01-01

    A linear accelerator of heavy ions is described. The basic contributions of the invention consist of a method and apparatus for obtaining high energy particles of an element with an increased charge-to-mass ratio. The method comprises the steps of ionizing the atoms of an element, accelerating the resultant ions to an energy substantially equal to one Mev per nucleon, stripping orbital electrons from the accelerated ions by passing the ions through a curtain of elemental vapor disposed transversely of the path of the ions to provide a second charge-to-mass ratio, and finally accelerating the resultant stripped ions to a final energy of at least ten Mev per nucleon.

  6. Linear absorptive dielectrics

    Tip, A.

    1998-06-01

    Starting from Maxwell's equations for a linear, nonconducting, absorptive, and dispersive medium, characterized by the constitutive equations D(x,t)=ɛ1(x)E(x,t)+∫t-∞dsχ(x,t-s)E(x,s) and H(x,t)=B(x,t), a unitary time evolution and canonical formalism is obtained. Given the complex, coordinate, and frequency-dependent, electric permeability ɛ(x,ω), no further assumptions are made. The procedure leads to a proper definition of band gaps in the periodic case and a new continuity equation for energy flow. An S-matrix formalism for scattering from lossy objects is presented in full detail. A quantized version of the formalism is derived and applied to the generation of Čerenkov and transition radiation as well as atomic decay. The last case suggests a useful generalization of the density of states to the absorptive situation.

  7. Viaje alrededor del sistema-mundo

    Pablo González Casanova

    2015-08-01

    Full Text Available Al iniciar el recorrido, Wallerstein sostiene dos tesis principales: que la historia está abierta, y que vivimos una etapa en que el determinismo disminuye. En un caso enfrenta las tesis de una historia clausurada, en otro, la de un futuro sin alternativas. Ni es el ?n de la historia ni vivimos en el mejor de los mundos posibles. La investigación y la acción tienen que explorar en los terrenos macro y micro de la política, la economía, la cultura y la sociedad y descubrir cómo se abre y cierra la historia del porvenir, y como se abren los límites actuales del sistema-mundo a los valores universales respetando sus particularidades y especi?cidades. El planteamiento de Wallerstein se opone a las tesis de moda de los funcionarios-?lósofos del “establishment” conservador, dizque tecnocientí?co y objetivo. Permite comprender un mundo que está abierto a la libertad aunque no necesariamente la alcance.

  8. Perspectivas de los sistemas de pago

    Daniel Heymann

    2016-04-01

    Full Text Available ResumenLos agentes, instrumentos y mecanismos que intervienen en la realización de transacciones cotidianas han ido variando considerablemente a lo largo del tiempo, de acuerdo a la evolución de las prácticas, tecnologías e instituciones que determinan costumbres y mecanismos de pago. La organización de los esquemas de intercambio, y de los sistemas financieros en general se ha convertido en tema saliente de discusión contemporánea. Estas notas presentan un breve análisis de la cuestión, centrado sobre los procedimientos para procesar pagos.Código JEL: E42. AbstractThe agents, instruments and mechanisms involved in everyday transactions have varied considerably over time, according to the evolution of practices, technologies and institutions that determine customs and payment mechanisms. The organization of exchange schemes, and financial systems in general, has become salient topic of contemporary discussion. This paper presents a brief analysis of the matter, focused on procedures to process payments. Key words: Monetary Systems,Payment Systems, Currency.Code JEL: E42

  9. Sistema integral para viviendas unifamiliares -SIVIM-

    Drágula, Josef

    1984-07-01

    Full Text Available The Integral System for Multi-family Housing —SIVIM— is a proposition combining a structural solution and a functional one. In the first, techniques developed in civil construction for reinforced concrete technology are incorporated in the production of buildings. The second one proposes a spatial solution appropriate to the users’ requirements. Thus, with this proposition, the aims of constructing mass, low-cost housing are maintained in countries with tropical climatesEl Sistema Integral para Viviendas Multifamiliares —SIVIM— es una proposición que combina una solución estructural y una solución funcional. En la primera, se incorporan técnicas desarrolladas en la construcción civil, para la tecnología del hormigón armado, a la producción de edificaciones. La segunda, propone una solución espacial apropiada a los requerimientos de los usuarios. Se mantiene así con esta proposición, las metas de la construcción masiva y del bajo costo de la vivienda en países de clima tropical

  10. Computer Program For Linear Algebra

    Krogh, F. T.; Hanson, R. J.

    1987-01-01

    Collection of routines provided for basic vector operations. Basic Linear Algebra Subprogram (BLAS) library is collection from FORTRAN-callable routines for employing standard techniques to perform basic operations of numerical linear algebra.

  11. Quaternion Linear Canonical Transform Application

    Bahri, Mawardi

    2015-01-01

    Quaternion linear canonical transform (QLCT) is a generalization of the classical linear canonical transfom (LCT) using quaternion algebra. The focus of this paper is to introduce an application of the QLCT to study of generalized swept-frequency filter

  12. Recursive Algorithm For Linear Regression

    Varanasi, S. V.

    1988-01-01

    Order of model determined easily. Linear-regression algorithhm includes recursive equations for coefficients of model of increased order. Algorithm eliminates duplicative calculations, facilitates search for minimum order of linear-regression model fitting set of data satisfactory.

  13. Dynamical systems and linear algebra

    Colonius, Fritz (Prof.)

    2007-01-01

    Dynamical systems and linear algebra / F. Colonius, W. Kliemann. - In: Handbook of linear algebra / ed. by Leslie Hogben. - Boca Raton : Chapman & Hall/CRC, 2007. - S. 56,1-56,22. - (Discrete mathematics and its applications)

  14. Linear spaces: history and theory

    Albrecht Beutelspracher

    1990-01-01

    Linear spaces belong to the most fundamental geometric and combinatorial structures. In this paper I would like to give an onerview about the theory of embedding finite linear spaces in finite projective planes.

  15. Linear versus non-linear supersymmetry, in general

    Ferrara, Sergio [Theoretical Physics Department, CERN,CH-1211 Geneva 23 (Switzerland); INFN - Laboratori Nazionali di Frascati,Via Enrico Fermi 40, I-00044 Frascati (Italy); Department of Physics and Astronomy, UniversityC.L.A.,Los Angeles, CA 90095-1547 (United States); Kallosh, Renata [SITP and Department of Physics, Stanford University,Stanford, California 94305 (United States); Proeyen, Antoine Van [Institute for Theoretical Physics, Katholieke Universiteit Leuven,Celestijnenlaan 200D, B-3001 Leuven (Belgium); Wrase, Timm [Institute for Theoretical Physics, Technische Universität Wien,Wiedner Hauptstr. 8-10, A-1040 Vienna (Austria)

    2016-04-12

    We study superconformal and supergravity models with constrained superfields. The underlying version of such models with all unconstrained superfields and linearly realized supersymmetry is presented here, in addition to the physical multiplets there are Lagrange multiplier (LM) superfields. Once the equations of motion for the LM superfields are solved, some of the physical superfields become constrained. The linear supersymmetry of the original models becomes non-linearly realized, its exact form can be deduced from the original linear supersymmetry. Known examples of constrained superfields are shown to require the following LM’s: chiral superfields, linear superfields, general complex superfields, some of them are multiplets with a spin.

  16. Linear versus non-linear supersymmetry, in general

    Ferrara, Sergio; Kallosh, Renata; Proeyen, Antoine Van; Wrase, Timm

    2016-01-01

    We study superconformal and supergravity models with constrained superfields. The underlying version of such models with all unconstrained superfields and linearly realized supersymmetry is presented here, in addition to the physical multiplets there are Lagrange multiplier (LM) superfields. Once the equations of motion for the LM superfields are solved, some of the physical superfields become constrained. The linear supersymmetry of the original models becomes non-linearly realized, its exact form can be deduced from the original linear supersymmetry. Known examples of constrained superfields are shown to require the following LM’s: chiral superfields, linear superfields, general complex superfields, some of them are multiplets with a spin.

  17. A primer on linear models

    Monahan, John F

    2008-01-01

    Preface Examples of the General Linear Model Introduction One-Sample Problem Simple Linear Regression Multiple Regression One-Way ANOVA First Discussion The Two-Way Nested Model Two-Way Crossed Model Analysis of Covariance Autoregression Discussion The Linear Least Squares Problem The Normal Equations The Geometry of Least Squares Reparameterization Gram-Schmidt Orthonormalization Estimability and Least Squares Estimators Assumptions for the Linear Mean Model Confounding, Identifiability, and Estimability Estimability and Least Squares Estimators F

  18. Control repetitivo digital de sistemas con frecuencia incierta o variante en el tiempo

    Ramon Costa-Castelló

    2012-07-01

    Full Text Available Resumen: El control repetitivo digital es una técnica basada en el principio del modelo interno que permite seguir y/o rechazar señales periódicas. Una hipótesis clave en los diseños tradicionales de control repetitivo es que la frecuencia de tales señales es constante y conocida, siendo su principal desventaja la elevada degradación de prestaciones que aparece cuando dicha frecuencia es incierta o varía con el tiempo. En este trabajo se presenta una revisión de las principales estrategias introducidas hasta la fecha para resolver este problema. Abstract: Digital repetitive control is an internal model principle-based control technique that aims at tracking/rejecting periodic signals. A key assumption in traditional repetitive control designs is that the frequency of such signals is constant and known, its main drawback being the dramatic loss of performance that occurs when this frequency is uncertain or time-varying. This article reviews the most relevant proposals introduced so far to overcome this problem. Palabras clave: Control repetitivo, Sistemas de control lineal, Sistemas de tiempo discreto, Regulación de salida, Keywords: Learning control, Linear control systems, Discretetime systems, Output regulation

  19. Características del conocimiento transferido como determinantes del rendimiento de los sistemas de franquicia

    Beatriz Minguela Rata

    2009-06-01

    Full Text Available En este trabajo se pretende analizar la influencia de la naturaleza tácita y el valor del conocimiento (dos características del conocimiento determinantes de la facilidad con la que se puede transferir el mismo en el rendimiento de los sistemas de franquicia. Se ha llevado a cabo un análisis de regresión lineal sobre una muestra de establecimientos franquiciados en diferentes cadenas de franquicia y sectores de actividad que operan en España, midiendo el rendimiento tanto de manera objetiva como subjetiva y tomando el tipo de actividad llevada a cabo por el establecimiento franquiciado como variable de control. Los resultados parecen indicar que la naturaleza tácita del conocimiento influye de manera negativa en el rendimiento de los sistemas de franquicia mientras que el valor del conocimiento afecta de manera positiva.In this paper the influence of tacitness and value of knowledge on the performance of franchise systems are studied. With this aim, a linear regression analysis is conducted on a sample of franchisee of different franchise chains and sectors of activity operating in Spain. In the model we added a control variable, named transformation, which representa the kind of activities carried out in the franchisee units: just commercial or transformative and commercial activities. The findings show that tacit knowledge has a negative impact on franchise systems performance, the value of knowledge affects it in a positive manner whereas the control variable is significant.

  20. O sistema social da saúde: conceito, limites e possibilidades

    Sandra Regina Martini Vial

    2014-06-01

    Full Text Available Discutem-se as possibilidades de definir o sistema da saúde como um sistema social, diferenciado funcionalmente, a partir da ótica da Teoria dos Sistemas Sociais, utilizando os pressupostos gerais da Teoria e a estrutura apresentada por Niklas Luhmann sobre o sistema médico. Apresentam-se alguns “desassossegos” provocados pela Teoria; as possíveis relações entre o sistema da saúde e o que Luhmann chamou de sistema médico e como esse sistema, atualmente, pode ser considerado sistema da saúde; e, por fim, a nossa concepção do sistema da saúde na atualidade.

  1. Templates for Linear Algebra Problems

    Bai, Z.; Day, D.; Demmel, J.; Dongarra, J.; Gu, M.; Ruhe, A.; Vorst, H.A. van der

    1995-01-01

    The increasing availability of advanced-architecture computers is having a very signicant eect on all spheres of scientic computation, including algorithm research and software development in numerical linear algebra. Linear algebra {in particular, the solution of linear systems of equations and

  2. Linearization of CIF through SOS

    Nadales Agut, D.E.; Reniers, M.A.; Luttik, B.; Valencia, F.

    2011-01-01

    Linearization is the procedure of rewriting a process term into a linear form, which consist only of basic operators of the process language. This procedure is interesting both from a theoretical and a practical point of view. In particular, a linearization algorithm is needed for the Compositional

  3. Linear Logic on Petri Nets

    Engberg, Uffe Henrik; Winskel, Glynn

    This article shows how individual Petri nets form models of Girard's intuitionistic linear logic. It explores questions of expressiveness and completeness of linear logic with respect to this interpretation. An aim is to use Petri nets to give an understanding of linear logic and give some apprai...

  4. SUSTENTABILIDADE EM SISTEMAS AGROFLORESTAIS: INDICADORES SOCIOECONÔMICOS

    Omar Daniel

    2000-03-01

    Full Text Available É ampla a discussão que envolve a importância do enquadramento das atividades de produção em geral, ao conceito de desenvolvimento sustentável. Dentre as atividades agropecuárias, os sistemas agroflorestais (SAF têm sido considerados como sustentáveis, apresentando-se como alternativas aos sistemas intensivos de produção. Para monitorar a sustentabilidade de atividades agropecuárias em geral, incluindo os SAF, diferentes autores enfatizam os indicadores biofísicos, em detrimento dos socioeconômicos. Com o objetivo de definir um rol de indicadores socioeconômicos adaptáveis aos diversos modelos de SAF, desenvolveu-se um estudo consolidado por recomendações de especialistas e ampla revisão de literatura. Concluiu-se que: as categorias relacionadas com a operação dos sistemas comportaram o maior número de indicadores no componente socioeconômico, com maior concentração nas operações endógenas ao sistema, seguidas, de longe, pelos recursos endógenos e exógenos; o maior número de indicadores, sugeridos na categoria operação do sistema, deu-se nos descritores saúde e nutrição, empregos, habitação e saneamento básico e análise econômica; na categoria operação de sistemas exógenos, determinou-se maior número de indicadores para os descritores comercialização e infra-estrutura rural; praticamente, não houve diferença entre o número de indicadores obtidos para os sistemas agroflorestais com e sem o componente animal.

  5. Linear particle accelerator

    Richards, J.A.

    1977-01-01

    A linear particle accelerator which provides a pulsed beam of charged particles of uniform energy is described. The accelerator is in the form of an evacuated dielectric tube, inside of which a particle source is located at one end of the tube, with a target or window located at the other end of the dielectric tube. Along the length of the tube are externally located pairs of metal plates, each insulated from each other in an insulated housing. Each of the plates of a pair are connected to an electrical source of voltage of opposed polarity, with the polarity of the voltage of the plates oriented so that the plate of a pair, nearer to the particle source, is of the opposed polarity to the charge of the particle emitted by the source. Thus, a first plate about the tube located nearest the particle source, attracts a particle which as it passes through the tube past the first plate is then repelled by the reverse polarity of the second plate of the pair to continue moving towards the target

  6. Generalized Linear Covariance Analysis

    Carpenter, James R.; Markley, F. Landis

    2014-01-01

    This talk presents a comprehensive approach to filter modeling for generalized covariance analysis of both batch least-squares and sequential estimators. We review and extend in two directions the results of prior work that allowed for partitioning of the state space into solve-for'' and consider'' parameters, accounted for differences between the formal values and the true values of the measurement noise, process noise, and textita priori solve-for and consider covariances, and explicitly partitioned the errors into subspaces containing only the influence of the measurement noise, process noise, and solve-for and consider covariances. In this work, we explicitly add sensitivity analysis to this prior work, and relax an implicit assumption that the batch estimator's epoch time occurs prior to the definitive span. We also apply the method to an integrated orbit and attitude problem, in which gyro and accelerometer errors, though not estimated, influence the orbit determination performance. We illustrate our results using two graphical presentations, which we call the variance sandpile'' and the sensitivity mosaic,'' and we compare the linear covariance results to confidence intervals associated with ensemble statistics from a Monte Carlo analysis.

  7. Equipartitioning in linear accelerators

    Jameson, R.A.

    1982-01-01

    Emittance growth has long been a concern in linear accelerators, as has the idea that some kind of energy balance, or equipartitioning, between the degrees of freedom, would ameliorate the growth. M. Prome observed that the average transverse and longitudinal velocity spreads tend to equalize as current in the channel is increased, while the sum of the energy in the system stays nearly constant. However, only recently have we shown that an equipartitioning requirement on a bunched injected beam can indeed produce remarkably small emittance growth. The simple set of equations leading to this condition are outlined. At the same time, Hofmann has investigated collective instabilities in transported beams and has identified thresholds and regions in parameter space where instabilities occur. Evidence is presented that shows transport system boundaries to be quite accurate in computer simulations of accelerating systems. Discussed are preliminary results of efforts to design accelerators that avoid parameter regions where emittance is affected by the instabilities identified by Hofmann. These efforts suggest that other mechanisms are present. The complicated behavior of the RFQ linac in this framework also is shown

  8. Equipartitioning in linear accelerators

    Jameson, R.A.

    1981-01-01

    Emittance growth has long been a concern in linear accelerators, as has the idea that some kind of energy balance, or equipartitioning, between the degrees of freedom, would ameliorate the growth. M. Prome observed that the average transverse and longitudinal velocity spreads tend to equalize as current in the channel is increased, while the sum of the energy in the system stays nearly constant. However, only recently have we shown that an equipartitioning requirement on a bunched injected beam can indeed produce remarkably small emittance growth. The simple set of equations leading to this condition are outlined below. At the same time, Hofmann, using powerful analytical and computational methods, has investigated collective instabilities in transported beams and has identified thresholds and regions in parameter space where instabilities occur. This is an important generalization. Work that he will present at this conference shows that the results are essentially the same in r-z coordinates for transport systems, and evidence is presented that shows transport system boundaries to be quite accurate in computer simulations of accelerating systems also. Discussed are preliminary results of efforts to design accelerators that avoid parameter regions where emittance is affected by the instabilities identified by Hofmann. These efforts suggest that other mechanisms are present. The complicated behavior of the RFQ linac in this framework also is shown

  9. Linear induction accelerators

    Briggs, R.J.

    1986-06-01

    The development of linear induction accelerators has been motivated by applications requiring high-pulsed currents of charged particles at voltages exceeding the capability of single-stage, diode-type accelerators and at currents too high for rf accelerators. In principle, one can accelerate charged particles to arbitrarily high voltages using a multi-stage induction machine, but the 50-MeV, 10-kA Advanced Test Accelerator (ATA) at LLNL is the highest voltage machine in existence at this time. The advent of magnetic pulse power systems makes sustained operation at high-repetition rates practical, and this capability for high-average power is very likely to open up many new applications of induction machines in the future. This paper surveys the US induction linac technology with primary emphasis on electron machines. A simplified description of how induction machines couple energy to the electron beam is given, to illustrate many of the general issues that bound the design space of induction linacs

  10. Berkeley Proton Linear Accelerator

    Alvarez, L. W.; Bradner, H.; Franck, J.; Gordon, H.; Gow, J. D.; Marshall, L. C.; Oppenheimer, F. F.; Panofsky, W. K. H.; Richman, C.; Woodyard, J. R.

    1953-10-13

    A linear accelerator, which increases the energy of protons from a 4 Mev Van de Graaff injector, to a final energy of 31.5 Mev, has been constructed. The accelerator consists of a cavity 40 feet long and 39 inches in diameter, excited at resonance in a longitudinal electric mode with a radio-frequency power of about 2.2 x 10{sup 6} watts peak at 202.5 mc. Acceleration is made possible by the introduction of 46 axial "drift tubes" into the cavity, which is designed such that the particles traverse the distance between the centers of successive tubes in one cycle of the r.f. power. The protons are longitudinally stable as in the synchrotron, and are stabilized transversely by the action of converging fields produced by focusing grids. The electrical cavity is constructed like an inverted airplane fuselage and is supported in a vacuum tank. Power is supplied by 9 high powered oscillators fed from a pulse generator of the artificial transmission line type.

  11. Sistemas híbrido de produção de energia para sistema de comunicações rádio

    Carreiras, José Manuel Patrício

    2014-01-01

    Mestrado em Sistemas de Energias Renováveis na Escola Superior de Tecnologia e Gestão do Instituto Politécnico de Viana do Castelo Este trabalho de projeto incidiu sobre o dimensionamento de cinco sistemas Autónomos de produção de energia para alimentação de Pontos repetidores do sistema de comunicação e sua implementação. O presente trabalho iniciou-se em 2006 quando por motivos profissionais foi necessário construir um sistema de comunicação de suporte ao sistema de telegestã...

  12. Estabilidade de agregados de um planossolo sob diferentes sistemas de manejo

    C. L. R. Lima

    2003-02-01

    Full Text Available Os solos de várzea no Rio Grande do Sul, considerando a heterogeneidade do material de origem e os diferentes graus de hidromorfismo, apresentam grandes variações nas suas características morfológicas, físicas, químicas e mineralógicas. Sua principal exploração tem ocorrido por meio do binômio: arroz irrigado e pecuária de corte, freqüentemente de baixa rentabilidade. A introdução de espécies de sequeiro em rotação e/ou sucessão com o arroz irrigado vem sendo apregoada para aumentar a utilização desses solos, permitir maior controle de plantas daninhas do arroz irrigado e melhorar o seu estado físico degradado mediante sistemas que envolvam menor mobilização do solo. Nesse contexto, avaliou-se o efeito de sistemas de preparo convencional (SC, cultivo mínimo (CM, semeadura direta (SD e pré-germinado (PG sobre o estado de agregação de um Planossolo Hidromórfico eutrófico, por meio dos seguintes atributos: distribuição de agregados estáveis em água em diferentes classes de tamanho e diâmetro médio ponderado dos agregados (DMP. O experimento vem sendo realizado desde 1995/96 e encontra-se instalado na Estação Experimental de Terras Baixas (ETB da Embrapa - Clima Temperado, no município do Capão do Leão (RS. Após três anos, o sistema de manejo SD favoreceu a formação de agregados de maior tamanho, originando maior diâmetro médio ponderado de agregados, enquanto o sistema de plantio PG proporcionou a maior concentração de agregados do solo na classe de menor tamanho, com menor diâmetro médio ponderado dos agregados. O diâmetro médio ponderado de agregados do solo correlacionou-se linear e positivamente com o C-orgânico, não apresentando correlação com a argila dispersa em água.

  13. Aplicación de técnicas de control robusto QFT a sistemas navales

    R. Muñoz-Mansilla

    2012-07-01

    Full Text Available Resumen: En este trabajo se realiza un análisis de diferentes metodologías de control robusto basadas en la técnica denominada Teoría de la Realimentación Cuantitativa, QFT (Quantitative Feedback Theory para resolver diferentes problemáticas que surgen en los sistemas de control marinos. En concreto se estudia el posicionamiento dinámico de una plataforma marina fondeada, la estabilización de un buque de alta velocidad, y el seguimiento de referencia para un aerodeslizador. Estos problemas de control presentan grandes retos de diseño, dado que son sistemas no lineales, multivariables, subactuados y con grandes perturbaciones. Los diferentes tipos de diseño QFT obtenidos consiguen una implementación robusta con prevención de acoplamientos, reducción de perturbaciones ambientales, respuestas rápidas y precisión en el seguimiento, que demuestran finalmente que es una alternativa práctica y eficaz para la solución de problemas de control en vehículos navales Abstract: In this work an analysis of the application of the Quantitative Feedback Theory (QFT technique to different marine systems is presented. Specifically, the problems of dynamic positioning of a moored platform, stabilization of a fast ferry and the tracking control of a hovercraft are studied. This control problem presents interesting questions to deal with, since the plants are non-linear, multivariable, underactuated and subject to large disturbances due to waves.Three multivariable nonlinear problems are solved using different sequential procedures. It is shown that the QFT controllers synthesis achieve robust performance, decoupling, environment disturbance reduction, quick answers and tracking precision. Therefore, it is shown that robust techniques based on QFT methodologies result feasible and very suitable, constituting an attractive alternative for robust design of marine vehicles. Palabras clave: Control robusto, sistema no lineal, vehículo subactuado

  14. Random linear codes in steganography

    Kamil Kaczyński

    2016-12-01

    Full Text Available Syndrome coding using linear codes is a technique that allows improvement in the steganographic algorithms parameters. The use of random linear codes gives a great flexibility in choosing the parameters of the linear code. In parallel, it offers easy generation of parity check matrix. In this paper, the modification of LSB algorithm is presented. A random linear code [8, 2] was used as a base for algorithm modification. The implementation of the proposed algorithm, along with practical evaluation of algorithms’ parameters based on the test images was made.[b]Keywords:[/b] steganography, random linear codes, RLC, LSB

  15. Sistemas autônomos, processos de interação e ações criativas

    Silvia Laurentiz

    2011-01-01

    Full Text Available A partir de Hugh Dubblerly, Usman Haque e Paul Pangaro em What is interaction: Are there different types?, como a lógica de diferentes sistemas - lineares, que se autorregulam, e que aprendem - pode modificar o pensamento do artista? Abordaremos este assunto colocando em foco o envolvimento da linguagem de programação na obra de arte e os modos por meio dos quais a relação entre autônomo e autômato pode estimular um novo campo de possibilidades.

  16. Sistemas multi–modales de profundidad restringida Multi-modal systems of restricted depth

    Manuel Sierra A.

    2008-01-01

    Se presentan como extensiones del cálculo proposicional clásico, la jerarquíade sistemas deductivos SMM–n con n > 1. SMM–n es el sistema multi–modalde profundidad–n. El sistema SMM–1 es el cálculo proposicional clásico. Elsistema SMM–(n + 1) puede ser visto como el resultado de aplicar la regla denecesariedad, asociada a los razonadores con suficiente capacidad de razona-miento, una vez a los teoremas del sistema SMM–n. El sistema SMM resultade la reunión de los sistemas de la jerarquía, y pu...

  17. En búsqueda del ADN y las influencias en algunos sistemas presidenciales y parlamentarios

    Jorge Carpizo

    2009-05-01

    Full Text Available El trabajo examina las recíprocas influencias entre las Constituciones de seis países: tres con sistema presidencial, dos con sistema parlamentario y uno con sistema semipresidencial. Los tres últimos pertenecen a Europa. Los sistemas presidenciales de América Latina se inspiraron en la Constitución Americana, tanto como en alguna europea, especialmente la española de 1812. Los enormes poderes presidenciales en América Latina llevaron a introducir en el sistema presidencial controles propios del sistema parlamentario

  18. Controle fuzzy espacialmente diferenciado para um sistema de irrigação

    Feliciano, Rafaelle de Aguiar Correia

    2012-01-01

    Projetos de irrigação tradicionais não determinam localmente a disponibilidade de água no solo. Assim, podem ocorrer ciclos irregulares de irrigação: alguns insuficientes, o que provoca déficit de água; outros em demasia, o que causa falta de oxigenação nas plantas. Devido à natureza não-linear do problema e do ambiente multivariável de processos de irrigação, a lógica fuzzy é sugerida como substituta aos sistemas comerciais de irrigação tipo ON-OFF com temporização pré-definid...

  19. SISTEMA DE CONTROL INTELIGENTE PARA UN GRUPO DE ELEVADORES

    Andrés Enrique Rosso Mateus

    2008-01-01

    Full Text Available En este artículo se trata el problema del tráfico vertical en edificios de gran altura y se describe el análisis, diseño y evaluación de un sistema de control para un grupo elevadores que busca mejorar el desempeño respecto a un sistema de control tradicional. El controlador propuesto busca asignar de una forma inteligente las llamadas que se generan a los ascensores que hacen parte del grupo, el desempeño del sistema se traduce en una reducción de los tiempos de servicio y de la energía que invierte el sistema. El controlador propuesto está basado en lógica difusa y las reglas de inferencia expresan el conocimiento de un experto orientado hacia la obtención de los objetivos mencionados. El controlador inteligente se evalúa en un simulador gráfico desarrollado para este fin, este simulador permite ingresar parámetros de configuración para que se adapte y represente una edificación real. Se corrieron dos simulaciones, una usando un controlador convencional y otra usando el controlador inteligente, esto con el fin de comparar su desempeño y cuantificar valores como tiempo de esperar de los usuarios y energía consumida por el sistema.

  20. Gobierno y administración de sistemas de riego

    Jacinta Palerm-Viqueira

    2005-01-01

    Full Text Available La propuesta es diferenciar gobierno y administración en los sistemas de riego, argumentando que el análisis que permite la caracterización de esta última no se puede realizar observando únicamente el locus de autoridad. Desde la perspectiva de la administración, hay casos de autogobierno en que los regantes mismos realizan todas las tareas con base en sistemas de conocimiento local, otros en que toda la administración se encuentra a cargo de personal contratado. Hay casos de administración burocrática y tecnocrática en sistemas con distinto locus de autoridad (Estado/regantes. Además, se propone que mientras el autogobierno de sistemas de riego no parece tener límites de tamaño, la administración sin burocracia ni persona l especializado parece estar acotada a sistemas de riego de una extensión determinada. No obstante, se argumenta que el gobierno influye sobre el carácter de la administración, dado que su descentralización disminuye o evita que sea burocrática/tecnocrática.

  1. Sistema paraconsistente LBPc¬I Sistema paraconsistente LBPc¬I

    Manuel Sierra A

    2006-12-01

    Full Text Available El lenguaje del sistema LBPc¬I extiende el lenguaje de la lógica clásica positiva al incluir un operador de negación débil y un operador de incompatibilidad, además, permite definir un operador de negación fuerte; este último tiene todas las características de la negación clásica. El sistema es caracterizado por una semántica de valuaciones tradicionales con la cual se prueba que, respecto al operador de negación débil, el sistema es paraconsistente. Como es de esperarse, cuando las fórmulas involucradas en un argumento se comportan clásicamente, es decir, son incompatibles con su negación débil, entonces la negación débil se comporta como la negación clásica, pero este requisito no siempre es necesario, la negación débil puede ser puntualmente tan potente como la clásica, aunque las fórmulas involucradas no se comporten clásicamente.The language of the LBPc¬I system extends the language of the classical positive logic when including an operator of weak negation and an operator of incompatibility, and permit to define an operator of strong negation; this last one has all the characteristics of the classical negation. The system is characterized by a traditional semantics with which test that, with respect to the operator of weak negation, the system is paraconsistent. When the formulas involved in an argument behave classically, that is to say, are incompatible with his weak negation, then the weak negation behaves like the classical negation, but this requirement not always is necessary, the weak negation can precise be as powerful as the classical negation although the involved formulas do not behave classically.

  2. Linear Algebraic Method for Non-Linear Map Analysis

    Yu, L.; Nash, B.

    2009-01-01

    We present a newly developed method to analyze some non-linear dynamics problems such as the Henon map using a matrix analysis method from linear algebra. Choosing the Henon map as an example, we analyze the spectral structure, the tune-amplitude dependence, the variation of tune and amplitude during the particle motion, etc., using the method of Jordan decomposition which is widely used in conventional linear algebra.

  3. Sistema de Absorción de Vibraciones de amplio Espectro basado en un nuevo Muelle de Rigidez variable

    Angel G. Gonzalez-Rodriguez

    2017-04-01

    the linear behaviour impedes applying scalability and addition. Palabras clave: Rigidez variable, sistema de absorción de vibraciones, muelle no lineal, muelle de láminas, sistemas no lineales, modelado y simulación, Keywords: Adjustable-stiffness, vibration absorber, non-linear spring, leaf spring, non-linear systems, modelling and simulation

  4. El sistema de partidos de cataluña

    Gema Sánchez Medero

    2011-07-01

    Full Text Available : El artículo realiza una radiografía del sistema de partidos políticos de Cataluña, fijando las características sobre el que gira el mismo. Inicialmente presenta un análisis de la evolución del sistema de partidos desde las primeras elecciones autonómicas hasta las últimas celebradas en noviembre de 2010. En una segunda parte estudia el peso que ha tenido cada una de las fuerzas catalanes en cada uno de los comicios que se han celebrado desde 1980 hasta 2010, fijando una serie de variables presentes en el sistema de partidos: predomino del eje centro-derecha y de los partidos nacionalistas, el voto dual y los niveles de abstención.

  5. Sistema de adquisición y procesamiento de audio

    Pérez Segurado, Rubén

    2015-01-01

    El objetivo de este proyecto es el diseño y la implementación de una plataforma para un sistema de procesamiento de audio. El sistema recibirá una señal de audio analógica desde una fuente de audio, permitirá realizar un tratamiento digital de dicha señal y generará una señal procesada que se enviará a unos altavoces externos. Para la realización del sistema de procesamiento se empleará: - Un dispositivo FPGA de Lattice, modelo MachX02-7000-HE, en la cual estarán todas la...

  6. arroz rojo (Oryza sativa L. en dos sistemas de labranza

    Steven Brenes Prendas

    2006-01-01

    Full Text Available A lo largo de cuatro ciclos de cultivo de arroz anegado, entre los años 2003 y 2004, en la Hacienda El Pelón de la Bajura, Liberia, Guanacaste, Costa Rica, se determinó la distribución espacial de las poblaciones de arroz rojo en los sistemas de Siembra Directa sobre Rastrojos (SDR y en Labranza Mecanizada Convencional (LMC. Mediante levantamientos de malezas ubicados en puntos fijos a nivel de campo y con ayuda del programa Surfer, se logró construir mapas georeferenciales de dichas poblaciones. El sistema SDR logró disminuir el ritmo de crecimiento de las poblaciones, facilitando su manejo, por lo contrario el sistema LMC, favoreció: la distribución, el aumento y la densidad de las poblaciones de arroz rojo en el campo. Los mapas de georeferencia facilitarían la toma de decisiones en el manejo integrado del arroz rojo

  7. Calagem na superfície em sistema plantio direto

    E. F. Caires; D. A. Banzatto; A. F. Fonseca

    2000-01-01

    Existem informações conflitantes a respeito da eficiência da aplicação superficial de calcário em sistema plantio direto, particularmente na correção da acidez do subsolo, e de critérios de recomendação de calagem para tal sistema de cultivo. Com o objetivo de avaliar a correção da acidez do solo e a produção de grãos de culturas em rotação no sistema plantio direto, considerando a aplicação de calcário na superfície, foi realizado um experimento em um Latossolo Vermelho-Escuro distrófico tex...

  8. Interface: Sistema orientado à visualização

    Alexandre Braga

    2015-06-01

    Full Text Available A criação de ambientes interativos para multiplataformas implica necessariamente o design de interface. Este artigo está dedicado às questões relativas à interface humano-computador cujas funções são definidas como sistema. Este apresenta atributos específicos que, neste caso, são tratados no contexto dos sistemas humano-máquina. Para que ambos os elementos possam interagir, é preciso haver um objetivo, ou seja, uma tarefa comum. Em função disso, as interfaces de usuário são observadas pela perspectiva do sistema humano-tarefa-computador, cujas interações são fundamentais para a compreensão da interface computacional.  

  9. Métodos de control en sistemas domóticos: últimas tendencias en sistemas distribuidos

    Moreno Navarro, I.

    1999-02-01

    Full Text Available Control systems lie amongst the most difficult issues to be tackled when it comes to designing home automation systems. Two classical tendencies may be considered to solve this problem. The first one consists of a centralised control system, whereas the second option advocates for a distributed network, where piece would take up certain responsibilities in the control of the whole system. In this paper we analyse some of the latest developments as regards programming distributed networks, focusing on home automation, specially Java and the latest Jini environments have dramatically improved the potential of such kind of distributed systems, thanks to them, it is possible to build a heterogeneous network including devices from different brands which work in collaborative systems, thus avoiding complex configurations.

    Uno de los aspectos más delicados a la hora de diseñar un sistema domótico es el que se refiere al modelo de control que deseamos establecer. Podemos considerar dos tendencias clásicas: la que trata de establecer un control centralizado del sistema y la que propone un control mucho más descentralizado, donde cada aparato seria responsable de cierta parte de la gestión del control ejercido sobre toda la red. En este articulo tratamos de profundizar en las últimas novedades aparecidas en el campo de la programación de los controladores asociados a una red domótica, en particular Java y el más reciente Jini, que aportan una serie de soluciones que facilitan la compatibilidad entre dispositivos de distintos fabricantes y apuestan claramente por una arquitectura de tipo distribuido, dotando a las redes domóticas de una flexibilidad y un potencial de crecimiento inusitados.

  10. Control lineal robusto de sistemas no lineales diferencialmente planos

    Hebertt Sira-Ramirez

    2011-01-01

    Full Text Available Resumen: En este trabajo se proponen controladores basados en observadores lineales para el control robusto de una clase amplia de sistemas no lineales conocidos como sistemas diferencialmente planos, sean estos monovariables o multivariables. Se establece primeramente el modelo dinámico entrada - salida plana, simplificándolo a un modelo de carácter no fenomenológico que solamente considera como elementos claves en el diseño del controlador el orden de integración del sistema y el factor de ganancia de entrada, en el caso monovariable, y, los órdenes de los subsistemas de integración de Kronecker y la matriz de ganancias del vector de entradas en el caso multivariable. El resto de las no linealidades, dependientes del estado o de naturaleza exógena, son consideradas, en general, como perturbaciones desconocidas pero acotadas que toman valores en el tiempo. Se demuestra que estas perturbaciones son algebraicamente observables, permitiendo su determinación aproximada mediante observadores lineales de orden arbitrario. Estos observadores, llamados observadores GPI, incluyen modelos internos que representan polinomios en el tiempo, cuya actualización es de índole automática, permitiendo aproximaciones arbitrariamente cercanas a las perturbaciones desconocidas. El diseño del controlador se reduce entonces a lograr la cancelación de las perturbaciones aditivas a la vez de imponer una dinámica lineal en lazo cerrado mediante realimentación de estados estimados, los cuales se obtienen directamente del mismo observador lineal propuesto. Se presenta un ejemplo de simulación que considera un sistema físico no lineal de complejidad reconocida. También se incluyen resultados experimentales sobre dos prototipos de laboratorio. Palabras Clave: Rechazo a perturbaciones, Realimentación lineal de salida, Sistemas linealizables, Observadores, Sistemas no lineales

  11. Linear Programming and Network Flows

    Bazaraa, Mokhtar S; Sherali, Hanif D

    2011-01-01

    The authoritative guide to modeling and solving complex problems with linear programming-extensively revised, expanded, and updated The only book to treat both linear programming techniques and network flows under one cover, Linear Programming and Network Flows, Fourth Edition has been completely updated with the latest developments on the topic. This new edition continues to successfully emphasize modeling concepts, the design and analysis of algorithms, and implementation strategies for problems in a variety of fields, including industrial engineering, management science, operations research

  12. LINEAR2007, Linear-Linear Interpolation of ENDF Format Cross-Sections

    2007-01-01

    1 - Description of program or function: LINEAR converts evaluated cross sections in the ENDF/B format into a tabular form that is subject to linear-linear interpolation in energy and cross section. The code also thins tables of cross sections already in that form. Codes used subsequently need thus to consider only linear-linear data. IAEA1311/15: This version include the updates up to January 30, 2007. Changes in ENDF/B-VII Format and procedures, as well as the evaluations themselves, make it impossible for versions of the ENDF/B pre-processing codes earlier than PREPRO 2007 (2007 Version) to accurately process current ENDF/B-VII evaluations. The present code can handle all existing ENDF/B-VI evaluations through release 8, which will be the last release of ENDF/B-VI. Modifications from previous versions: - Linear VERS. 2007-1 (JAN. 2007): checked against all ENDF/B-VII; increased page size from 60,000 to 600,000 points 2 - Method of solution: Each section of data is considered separately. Each section of File 3, 23, and 27 data consists of a table of cross section versus energy with any of five interpolation laws. LINEAR will replace each section with a new table of energy versus cross section data in which the interpolation law is always linear in energy and cross section. The histogram (constant cross section between two energies) interpolation law is converted to linear-linear by substituting two points for each initial point. The linear-linear is not altered. For the log-linear, linear-log and log- log laws, the cross section data are converted to linear by an interval halving algorithm. Each interval is divided in half until the value at the middle of the interval can be approximated by linear-linear interpolation to within a given accuracy. The LINEAR program uses a multipoint fractional error thinning algorithm to minimize the size of each cross section table

  13. Calidad en el desarrollo de Sistemas de Software

    Pesado, Patricia Mabel; Bertone, Rodolfo Alfredo; Esponda, Silvia; Pasini, Ariel C.; Martorelli, Sabrina Lorena

    2010-01-01

    El objetivo del subproyecto “Calidad en el desarrollo de Sistemas de Software" es analizar, investigar y desarrollar propuestas en temas relacionados con el aseguramiento de la calidad en cada una de las etapas del desarrollo de Sistemas de Software. En particular se ha trabajado y estudiado las normas de calidad más ampliamente difundidas, líneas ISO y CMMI, y su incidencia en entornos como la pequeña y mediana industria de nuestro país. Desde el año 2006, se ha trabajado en la adecuación...

  14. Evaluación de un sistema experimental de acuaponia

    M. García-Ulloa; C. León; F. Hernández; R. Chavéz

    2005-01-01

    Se evaluó un sistema experimental de acuaponia, incorporando la producción de tilapia (Oreochromis mossambicus) y pepino (Cucumis sativus) durante 75 días. Los peces (90 g de peso promedio inicial) se mantuvieron en un tanque de 500 l, a una densidad de 0.6 peces/litro, mientras que 40 plántulas de pepino se sembraron en 2 camas de arena estéril. Las plantas se regaron con agua de desecho de las tilapias, con un sistema de recirculación de agua. Cada semana se registraron las concentraciones ...

  15. Sistema instrumentado para o registro de comportamentos ingestivos

    Pereira, Gustavo Vieira

    2003-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia Elétrica. Este trabalho descreve um sistema automático para registro de parâmetros que permitam o estudo de atributos do comportamento ingestivo de animais em laboratório. Este sistema é orientado a usuários que não são profissionais da área de engenharia. Portanto, dispensa a necessidade de configurações eletrônicas que são desestimulantes para biólogos, fisiologist...

  16. Implementación del sistema para municipios, usando pmi

    Cruz Ruiz, Victor Hugo; Buenaño Vera, Sulay Pamela; Freire Cobo, Lenin

    2014-01-01

    El objetivo de informe de graduación, es plantear y describir la implementación de un sistema informático en una entidad municipal usando PMI, siguiendo las pautas definidas en la Guía del PMBOK. Nuestro estudio es aplicar la Metodología Administración de Proyectos PMI a un proyecto ya terminado. Para este proyecto hemos tomado la información de la implementación del Sistema CABILDO ERP en el Gobierno Municipal de San Jacinto de Yaguachi, realizado por la empresa ecuatoriana...

  17. Funciones del Fiscal en el Sistema Procesal Penal Acusatorio Ecuatoriano

    Guillén, Oscar Medardo

    2006-01-01

    El art.219 de la Constitución Política vigente, define el nuevo marco legal, para el ejercicio de la acción penal de instancia pública, del Ministerio Público, en concordancia con el Nuevo Código de Procedimiento Penal y la Ley Orgánica del Ministerio Público, instrumentos jurídicos que han permitido el cambio del sistema conocido como inquisitivo , caracterizado por la concentración de funciones en el juez, para dar paso al sistema acusatorio oral que se ha dicho es mas humano, democrático y...

  18. Linfoma do sistema nervoso central: ensaio iconográfico

    Fabiano Reis

    2013-04-01

    Full Text Available Ilustramos este ensaio iconográfico de linfoma do sistema nervoso central com imagens de ressonância magnética obtidas em nosso serviço nos últimos 13 anos e discutimos algumas das principais características radiológicas deste tipo de linfoma, primário e secundário. O linfoma sistema nervoso central é um tumor relativamente infrequente, mas alguns achados na ressonância magnética podem sugerir este diagnóstico.

  19. Sistema genérico de replicación

    Jiménez Ortiz, Raúl

    2014-01-01

    Este proyecto se desarrolla en una de las principales compañías eléctricas de España, y trata sobre la creación de un sistema genérico de replicación de datos. La idea surge de la necesidad de estandarizar la forma de traspasar información entre departamentos o sistemas, debido a que existen gran variedad de interfaces diferentes, y cada vez que surge la necesidad de crear una implica nuevos costes de desarrollo, mantenimiento y futuros evolutivos. Entre los diferentes departamentos de ...

  20. Sistemas de Inteligencia Web basados en redes sociales

    Rosa Troyano, Fco. Fernando de la; Martínez Gasca, Rafael

    2007-01-01

    El Análisis de las Redes Sociales (ARS) es un área que está emergiendo como imprescindible en los procesos de toma de decisiones. Su capacidad para analizar e intervenir una red social puede ser aprovechada para implantar tareas de vigilancia en los sistemas de inteligencia de un centro de investigación o una empresa de base tecnológica. El objetivo de este trabajo es realizar una propuesta para diseñar sistemas de inteligencia web basados en redes sociales. El primer obstáculo para implantar...

  1. Sistemas de Inteligencia Web basados en Redes Sociales

    de la Rosa Troyano, Fco. Fernando; Martínez Gasca, Rafael

    2007-01-01

    El Análisis de las Redes Sociales (ARS) es un área que está emergiendo como imprescindible en los procesos de toma de decisiones. Su capacidad para analizar e intervenir una red social puede ser aprovechada para implantar tareas de vigilancia en los sistemas de inteligencia de un centro de investigación o una empresa de base tecnológica. El objetivo de este trabajo es realizar una propuesta para diseñar sistemas de inteligencia web basados en redes sociales. El primer obstáculo para implantar...

  2. Sistemas Correctores de Campo Para EL Telescopio Cassegrain IAC80

    Galan, M. J.; Cobos, F. J.

    1987-05-01

    El proyecto de instrumentación de mayor importancia que ha tenido el Instituto de Astrofisica de Canarias en los últimos afios ha sido el diseflo y construcción del te1escopio IAC8O. Este requería del esfuerzo con junto en mec´nica, óptica y electrónica, lo que facilitó la estructuración y el crecimiento de los respectivos grupos de trabajo, que posteriormente se integraron en departamentos En su origen (1977), el telescopio IAC80 fue concebido como un sistema clásico tipo Cassegrain, con una razón focal F/i 1.3 para el sistema Casse grain y una razón focal F/20 para el sistema Coudé. Posteriormente, aunque se mantuvo la filosofia de que el sistema básico fuera el F/11.3, se consideró conveniente el diseño de secundarios para razones focales F/16 y F/32, y se eliminó el de F/20. Sin embargo, dada la importancia relativa que un foco estrictamente fotográfico tiene en un telescopio moderno, diseñado básicamente para fotometría fotoeléctrica y con un campo util mínimamente de 40 minutos de arco, se decídió Ilevar a cabo el diseño de un secundario F/8 con un sistema corrector de campo, pero que estuviera formado únicamente por lentes con superficies esféricas para que asl su construcción fuera posible en España ó en México. La creciente utilización de detectores bidimensionales para fines de investigación astron6mica y la viabilidad de que en un futuro cercano éstos tengan un área sensible cada vez mayor, hicieron atractiva la idea de tener diseñado un sistema corrector de campo para el foco primario (F/3), con un campo útil mínimo de un grado, y también con la limitante de que sus componentes tuvieron sólamente supérficies esféricas. Ambos diseños de los sis-temas correctores de campo se llevaron a cabo, en gran medida, como parte de un proyecto de colaboración e intercambio en el área de diseño y evaluación de sistemas ópticos.

  3. Sistemas adhesivos en Odontología Restauradora

    Mandri, María Natalia; Aguirre Grabre de Prieto, Alicia; Zamudio, María Eugenia

    2015-01-01

    Los sistemas adhesivos actuales han permitido mejorar los procedimientos clínicos tanto en la evolución de los componentes y su mecanismo de acción, como en la disminución del tiempo operatorio de aplicación de cada uno de ellos, brindando una eficacia clínica aceptable y predecible. Esta demanda de efectividad, ha dado lugar a una gran variedad de sistemas adhesivos, que en muchas ocasiones, no se emplean en la práctica profesional. El propósito de este trabajo es realizar una revisión de lo...

  4. El sistema visual y el sueño

    Garrido Lozano, Ana Isabel

    2015-01-01

    A pesar de la gran cantidad de tiempo que invertimos durmiendo, el sueño sigue siendo, hoy en día, un gran desconocido. Sin embargo, sabemos que es un estado -indispensable para la vida- activo del sistema nervioso mediante registro electroencefalográfico. Para que tenga lugar el inicio del sueño, el núcleo supraquiasmático debe recibir señales del sistema visual, el cual indica la disminución de luz. Cuando inicia el proceso del sueño, éste pasa por diferentes fases caracterizadas por la no ...

  5. Debido proceso, sistemas y reforma del proceso penal

    Teresa Armenta Deu

    2015-03-01

    Full Text Available Este artículo se propone examinar los modelos de procesos penales de los movimientos de reforma que se establecieron en las últimas décadas del siglo XX, en los países iberoamericanos. Para ello, primero se enfatiza las características históricas de cada sistema, poniendo de relieve la importancia de no confundir el acusatorio con el adversarial, rechazando la coincidencia entre los sistemas actuales y mixto inquisitivo histórico. Apoya la importancia de la igualdad de armas y e del contradictoria en la búsqueda de un equilibrio entre los modelos de procedimiento.

  6. Diseño de Sistema de Inventario Corporativo

    Solis Chusan, Harry Eduardo

    2015-01-01

    La Tesis sobre “Diseño de Sistema de Inventario Corporativo” nos va a indicar como solo un sistema de inventario podrá facilitar el manejo de la empresa en este ámbito, siendo este modificable en el transcurso del tiempo para cumplir con las necesidades que se requieran. Prestando ayuda en el control y distribución en los insumos que proveen, nos dará un indicativo si necesita más productos en stock o se necesitan ponerlos en descuento por el tiempo que ha tenido gua...

  7. Diseño de Sistema de Inventario Coorporativo

    Yanten Gomez, Yaan Carlos

    2015-01-01

    La Tesis sobre “Diseño de Sistema de Inventario Corporativo” nos va a indicar como solo un sistema de inventario podrá facilitar el manejo de la empresa en este ámbito, siendo este modificable en el transcurso del tiempo para cumplir con las necesidades que se requieran. Prestando ayuda en el control y distribución en los insumos que proveen, nos dará un indicativo si necesita más productos en stock o se necesitan ponerlos en descuento por el tiempo que ha tenido guardado, todo esto para evit...

  8. Sistema de detección de malware en Android

    Heras Cáceres, Inés; Sierra Liras, Diego

    2015-01-01

    El presente trabajo trata de dar respuesta al problema de la detección del malware en los dispositivos móviles. Los sistemas de protección que actualmente poseen los dispositivos móviles inteligentes se han mostrado ineficaces. Para asegurarlos frente a una posible infección de software malicioso, debe completarse la seguridad que ofrecen las características del sistema o la criba de aplicaciones en los mercados de descarga oficiales. Siendo un área de investigación reciente, la mayor parte d...

  9. TECNOLOGÍAS ASOCIADAS AL SISTEMA POWER TO GAS

    Perez Gil, Susana; Belsue Etxeberria, Mikel

    2017-01-01

    El sistema "Power-to-Gas" (PtG) permite almacenar energía eléctrica mediante su transformación en energía química en forma de hidrógeno o metano. Estos gases pueden ser inyectados a la red de gas natural para su posterior distribución y uso. En este artículo se explican las diferentes tecnologías de las que consta el sistema PtG: la electrolisis, para la producción de hidrógeno, y la metanación, para la producción de metano.

  10. Algoritmo de cifrado para sistemas móviles

    Castro Lechtaler, Antonio; Cipriano, Marcelo; García, Edith; Liporace, Julio César; Maiorano, Ariel; Malvacio, Eduardo; Tapia, Néstor

    2017-01-01

    Este proyecto de investigación persigue elaborar el diseño y desarrollo de un Algoritmo de Cifrado para Sistemas Móviles que por sus propiedades de velocidad, compactibili- dad y robustez; pueda ser implementado en equipos de comunicaciones que funcionan so- bre Sistemas Móviles. Se esperan obtener resultados teóricos, prácticos y la realización de un desarrollo experimental. Los modernos algoritmos criptológicos responden a principios y filosofías diferentes a las que se llevaban a cab...

  11. Sistemas de software distribuidos y bases de datos distribuidas

    Pesado, Patricia Mabel; Ramón, Hugo Dionisio; Thomas, Pablo Javier; Boracchia, Marcos; Champredonde, Raúl; Pasini, Ariel C.; Chichizola, Franco; Iglesias, Marina; Marrero, Luciano; Albanesi, María Bernarda; Delía, Lisandro Nahuel; Ricci, Guillermo

    2006-01-01

    El proyecto de investigación y desarrollo en Sistemas de Software Distribuido, abarca aspectos que van desde los fundamentos del desarrollo (Técnicas de Ingeniería de Requerimientos, Metodologías de Gestión y Desarrollo de Proyectos, Técnicas de Planificación, Métricas, Normas de Calidad, Web-Systems) hasta la concepción de aplicaciones específicas orientadas a los procesos industriales (Sistemas de Planeamiento de Producción, Control Industrial en tiempo real), procesos de E-government (Voto...

  12. Calidad en el desarrollo de Sistemas de Software

    Pesado, Patricia Mabel; Bertone, Rodolfo Alfredo; Ramón, Hugo Dionisio; Pasini, Ariel C.; Esponda, Silvia; Alonso, Laura Mabel

    2006-01-01

    El proyecto de investigación y desarrollo “Sistemas de Software Distribuidos. Aplicaciones en procesos industriales, E-government y E-learning” abarca aspectos que van desde los fundamentos del desarrollo (Técnicas de Ingeniería de requerimientos, Metodologías de Gestión y Desarrollo de Proyectos, Técnicas de Planificación, Métricas, Normas de Calidad, Web-Systems) hasta la concepción de aplicaciones específicas orientadas a los procesos industriales (sistemas de planeamiento industrial, cont...

  13. Sposobnost opstanka informacionih sistema / Survivability of information systems

    Boško Rodić

    2005-03-01

    Full Text Available U radu je opisan značaj i trend razvoja informacionih sistema u savremenom društvu, a definisani su i drugi značajni pojmovi radi boljeg razumevanja problema. Prikazana su i četiri aspekta rešenja sposobnosti opstanka informacionih sistema koje predlaže Computer Emergency Response Team (CERT. / The article deals with importance and trend of information systems in modern society. In the article are defined, beside survivability, other relevant ideas necessary for better understanding of the problems. Also, in the article are illustrated four aspects of information system survivability solution by Computer Emergency Response Team (CERT.

  14. Modelado y análisis de sistemas fotovoltaicos

    Guasch Murillo, Daniel

    2003-01-01

    Bajo la etiqueta de "Modelado y análisis de sistemas fotovoltaicos" se presentan los trabajos realizados a lo largo del doctorado. Estos estudios centran su aplicación en el área de los sistemas fotovoltaicos. Tienen por objetivo conseguir un entorno de trabajo que permita analizar la problemática asociada a instalaciones fotovoltaicas desde su diseño hasta su puesta en marcha y posterior explotación. Se ha escogido Matlab/Simulink como núcleo del entorno de trabajo debido a la gran potencia ...

  15. La guerra de los sistemas operativos V1.0

    López Get, Anthony

    2010-01-01

    Este artículo analiza tres tipos diferentes de sistemas operativos para computadoras —Windows®, Mac OS® y las distribuciones GNU/Linux®— como objetos culturales, desde la ideología, el mito y la cultura material. Se estudia como estos programas de ordenador se erigen como símbolos representativos de diferentes grupos culturales, al reproducir hábitos de consumo, diferenciación social, y discursos hegemónicos, sub y contraculturales, todos dentro del ámbito de los sistemas de producción actual...

  16. Sistemas de controle gerencial e contratos psicológicos

    Ivan Canan

    2013-01-01

    Esta pesquisa investiga a relação entre os sistemas de controle gerencial e os contratos psicológicos, como forma de discutir as relações contratuais nas organizações. Os sistemas de controle gerencial foram definidos como processos administrativos de proposição de parâmetros comportamentais idealmente construídos para criar convergência de objetivos entre servidores e organizações, cuja dinâmica de controle implica no diagnóstico de resultados e nos processos de interação acerca do desempenh...

  17. Desarrollo histórico del sistema sanitario de Ecuador

    Castillo Morocho, Silvia

    2015-01-01

    En este trabajo se describen las condiciones de salud de Ecuador y con mayor detalle, las características del sistema ecuatoriano de salud, incluyendo su estructura y cobertura, programas de salud, fuentes de financiamiento, los recursos físicos, materiales y humanos de los que dispone, las tareas de rectoría que desarrolla el Ministerio de Salud Pública. La República de Ecuador no escapó de los efectos de las sucesivas crisis económicas, y su sistema de salud estuvo marcado por más de 15 ...

  18. Desarrollo e implementación del sistema experto Diagnogsys

    Halcón Fernández, Alejandro

    2015-01-01

    El presente proyecto consiste en el diseño y la implementación de un sistema experto multidisciplinar y polivalente capaz de resolver problemas que se le plantearían a un experto humano de una determinada materia o disciplina. Este documento explicará y detallará el diseño y el funcionamiento del sistema experto Diagnogsys aplicado al ámbito de los diagnósticos médicos, cuyo principal objetivo consistirá en simular a un experto humano en medicina general, como ejemplo del funcionamiento de...

  19. Sistema de enseñanza/aprendizaje inteligente para grafos

    Martínez, Natalia; Ferreira, Gheisa; García, Zoila Zenaida

    2007-01-01

    La teoría de grafos es un tema de estudio de la Matemática Discreta que por su importancia está presente en asignaturas de la carrera Ciencia de la Computación. Dificultades presentadas con respecto a su aprendizaje, han conducido al diseño e implementación de un Sistema de Enseñanza/Aprendizaje Inteligente (SEAI) que aborde esta temática. Los SEAI se caracterizan por aplicar técnicas de Inteligencia Artificial (IA) al desarrollo de sistemas de enseñanza asistida por computadoras, donde el té...

  20. Una Visión General del Sistema Financiero Colombiano

    Hernando Zuleta G.

    1997-01-01

    Desde finales de los 80 el sistema financiero colombiano ha experimentado cambios sensibles. En efecto, la liberalización financiera, el fortalecimiento de la regulación prudencial, la conversión de un número importante de sociedades en establecimientos de crédito, el aumento en los requisitos de capital, etc. han determinado un cambio de perfil en el sistema. Adicionalmente, en el pasado reciente las autoridades han tomado medidas en cuanto a la estructura de los encajes, aumentos en los req...

  1. Elementary linear programming with applications

    Kolman, Bernard

    1995-01-01

    Linear programming finds the least expensive way to meet given needs with available resources. Its results are used in every area of engineering and commerce: agriculture, oil refining, banking, and air transport. Authors Kolman and Beck present the basic notions of linear programming and illustrate how they are used to solve important common problems. The software on the included disk leads students step-by-step through the calculations. The Second Edition is completely revised and provides additional review material on linear algebra as well as complete coverage of elementary linear program

  2. The art of linear electronics

    Hood, John Linsley

    2013-01-01

    The Art of Linear Electronics presents the principal aspects of linear electronics and techniques in linear electronic circuit design. The book provides a wide range of information on the elucidation of the methods and techniques in the design of linear electronic circuits. The text discusses such topics as electronic component symbols and circuit drawing; passive and active semiconductor components; DC and low frequency amplifiers; and the basic effects of feedback. Subjects on frequency response modifying circuits and filters; audio amplifiers; low frequency oscillators and waveform generato

  3. Linearity and Non-linearity of Photorefractive effect in Materials ...

    Linearity and Non-linearity of Photorefractive effect in Materials using the Band transport ... For low light beam intensities the change in the refractive index is ... field is spatially phase shifted by /2 relative to the interference fringe pattern, which ...

  4. The linear programming bound for binary linear codes

    Brouwer, A.E.

    1993-01-01

    Combining Delsarte's (1973) linear programming bound with the information that certain weights cannot occur, new upper bounds for dmin (n,k), the maximum possible minimum distance of a binary linear code with given word length n and dimension k, are derived.

  5. Linear operator inequalities for strongly stable weakly regular linear systems

    Curtain, RF

    2001-01-01

    We consider the question of the existence of solutions to certain linear operator inequalities (Lur'e equations) for strongly stable, weakly regular linear systems with generating operators A, B, C, 0. These operator inequalities are related to the spectral factorization of an associated Popov

  6. Linear and non-linear optics of condensed matter

    McLean, T.P.

    1977-01-01

    Part I - Linear optics: 1. General introduction. 2. Frequency dependence of epsilon(ω, k vector). 3. Wave-vector dependence of epsilon(ω, k vector). 4. Tensor character of epsilon(ω, k vector). Part II - Non-linear optics: 5. Introduction. 6. A classical theory of non-linear response in one dimension. 7. The generalization to three dimensions. 8. General properties of the polarizability tensors. 9. The phase-matching condition. 10. Propagation in a non-linear dielectric. 11. Second harmonic generation. 12. Coupling of three waves. 13. Materials and their non-linearities. 14. Processes involving energy exchange with the medium. 15. Two-photon absorption. 16. Stimulated Raman effect. 17. Electro-optic effects. 18. Limitations of the approach presented here. (author)

  7. Advanced statistics: linear regression, part I: simple linear regression.

    Marill, Keith A

    2004-01-01

    Simple linear regression is a mathematical technique used to model the relationship between a single independent predictor variable and a single dependent outcome variable. In this, the first of a two-part series exploring concepts in linear regression analysis, the four fundamental assumptions and the mechanics of simple linear regression are reviewed. The most common technique used to derive the regression line, the method of least squares, is described. The reader will be acquainted with other important concepts in simple linear regression, including: variable transformations, dummy variables, relationship to inference testing, and leverage. Simplified clinical examples with small datasets and graphic models are used to illustrate the points. This will provide a foundation for the second article in this series: a discussion of multiple linear regression, in which there are multiple predictor variables.

  8. Alternativas eficientes para procesamiento y comunicaciones en sistemas de tiempo real

    Romero, Fernando; Méndez, Mariano; Encinas, Diego; De Giusti, Armando Eduardo; Tinetti, Fernando Gustavo; Medina, Santiago; Pi Puig, Martín; Paniego, Juan Manuel; Dell'Oso, Matías

    2017-01-01

    El objetivo de esta línea de investigación es el estudio y desarrollo de Sistemas de Tiempo Real (STR), en particular, la planificación de tareas y la comunicación en Sistemas Distribuidos de Tiempo Real (SDTR), experimentando con microcontroladores y simulaciones para la adquisición y control de las variables del sistema.

  9. El Sistema Fundamentals in Practice: An Examination of One Public Elementary School Partnership in the US

    Simpson Steele, Jamie

    2017-01-01

    El Sistema is a Venezuelan program of social change that has inspired a worldwide movement in music education. El Sistema inspires social transformation and musical excellence to occur simultaneously and symbiotically. This study examines: What does El Sistema look like within the context of a public school partnership in the United States? How do…

  10. Para-mixed linear spaces

    Crasmareanu Mircea

    2017-12-01

    Full Text Available We consider the paracomplex version of the notion of mixed linear spaces introduced by M. Jurchescu in [4] by replacing the complex unit i with the paracomplex unit j, j2 = 1. The linear algebra of these spaces is studied with a special view towards their morphisms.

  11. Linear Algebra and Image Processing

    Allali, Mohamed

    2010-01-01

    We use the computing technology digital image processing (DIP) to enhance the teaching of linear algebra so as to make the course more visual and interesting. Certainly, this visual approach by using technology to link linear algebra to DIP is interesting and unexpected to both students as well as many faculty. (Contains 2 tables and 11 figures.)

  12. Efficient Searching with Linear Constraints

    Agarwal, Pankaj K.; Arge, Lars Allan; Erickson, Jeff

    2000-01-01

    We show how to preprocess a set S of points in d into an external memory data structure that efficiently supports linear-constraint queries. Each query is in the form of a linear constraint xd a0+∑d−1i=1 aixi; the data structure must report all the points of S that satisfy the constraint. This pr...

  13. Linear Motor With Air Slide

    Johnson, Bruce G.; Gerver, Michael J.; Hawkey, Timothy J.; Fenn, Ralph C.

    1993-01-01

    Improved linear actuator comprises air slide and linear electric motor. Unit exhibits low friction, low backlash, and more nearly even acceleration. Used in machinery in which positions, velocities, and accelerations must be carefully controlled and/or vibrations must be suppressed.

  14. Linear morphoea follows Blaschko's lines.

    Weibel, L; Harper, J I

    2008-07-01

    The aetiology of morphoea (or localized scleroderma) remains unknown. It has previously been suggested that lesions of linear morphoea may follow Blaschko's lines and thus reflect an embryological development. However, the distribution of linear morphoea has never been accurately evaluated. We aimed to identify common patterns of clinical presentation in children with linear morphoea and to establish whether linear morphoea follows the lines of Blaschko. A retrospective chart review of 65 children with linear morphoea was performed. According to clinical photographs the skin lesions of these patients were plotted on to standardized head and body charts. With the aid of Adobe Illustrator a final figure was produced including an overlay of all individual lesions which was used for comparison with the published lines of Blaschko. Thirty-four (53%) patients had the en coup de sabre subtype, 27 (41%) presented with linear morphoea on the trunk and/or limbs and four (6%) children had a combination of the two. In 55 (85%) children the skin lesions were confined to one side of the body, showing no preference for either left or right side. On comparing the overlays of all body and head lesions with the original lines of Blaschko there was an excellent correlation. Our data indicate that linear morphoea follows the lines of Blaschko. We hypothesize that in patients with linear morphoea susceptible cells are present in a mosaic state and that exposure to some trigger factor may result in the development of this condition.

  15. Dynamic Linear Models with R

    Campagnoli, Patrizia; Petris, Giovanni

    2009-01-01

    State space models have gained tremendous popularity in as disparate fields as engineering, economics, genetics and ecology. Introducing general state space models, this book focuses on dynamic linear models, emphasizing their Bayesian analysis. It illustrates the fundamental steps needed to use dynamic linear models in practice, using R package.

  16. Linear Programming across the Curriculum

    Yoder, S. Elizabeth; Kurz, M. Elizabeth

    2015-01-01

    Linear programming (LP) is taught in different departments across college campuses with engineering and management curricula. Modeling an LP problem is taught in every linear programming class. As faculty teaching in Engineering and Management departments, the depth to which teachers should expect students to master this particular type of…

  17. Introduction to RF linear accelerators

    Weiss, M.

    1994-01-01

    The basic features of RF linear accelerators are described. The concept of the 'loaded cavity', essential for the synchronism wave-particle, is introduced, and formulae describing the action of electromagnetic fields on the beam are given. The treatment of intense beams is mentioned, and various existing linear accelerators are presented as examples. (orig.)

  18. Spatial Processes in Linear Ordering

    von Hecker, Ulrich; Klauer, Karl Christoph; Wolf, Lukas; Fazilat-Pour, Masoud

    2016-01-01

    Memory performance in linear order reasoning tasks (A > B, B > C, C > D, etc.) shows quicker, and more accurate responses to queries on wider (AD) than narrower (AB) pairs on a hypothetical linear mental model (A -- B -- C -- D). While indicative of an analogue representation, research so far did not provide positive evidence for spatial…

  19. Linear methods in band theory

    Andersen, O. Krogh

    1975-01-01

    of Korringa-Kohn-Rostoker, linear-combination-of-atomic-orbitals, and cellular methods; the secular matrix is linear in energy, the overlap integrals factorize as potential parameters and structure constants, the latter are canonical in the sense that they neither depend on the energy nor the cell volume...

  20. Introduction to generalized linear models

    Dobson, Annette J

    2008-01-01

    Introduction Background Scope Notation Distributions Related to the Normal Distribution Quadratic Forms Estimation Model Fitting Introduction Examples Some Principles of Statistical Modeling Notation and Coding for Explanatory Variables Exponential Family and Generalized Linear Models Introduction Exponential Family of Distributions Properties of Distributions in the Exponential Family Generalized Linear Models Examples Estimation Introduction Example: Failure Times for Pressure Vessels Maximum Likelihood Estimation Poisson Regression Example Inference Introduction Sampling Distribution for Score Statistics Taylor Series Approximations Sampling Distribution for MLEs Log-Likelihood Ratio Statistic Sampling Distribution for the Deviance Hypothesis Testing Normal Linear Models Introduction Basic Results Multiple Linear Regression Analysis of Variance Analysis of Covariance General Linear Models Binary Variables and Logistic Regression Probability Distributions ...

  1. Acoustic emission linear pulse holography

    Collins, H.D.; Busse, L.J.; Lemon, D.K.

    1983-01-01

    This paper describes the emission linear pulse holography which produces a chronological linear holographic image of a flaw by utilizing the acoustic energy emitted during crack growth. A thirty two point sampling array is used to construct phase-only linear holograms of simulated acoustic emission sources on large metal plates. The concept behind the AE linear pulse holography is illustrated, and a block diagram of a data acquisition system to implement the concept is given. Array element spacing, synthetic frequency criteria, and lateral depth resolution are specified. A reference timing transducer positioned between the array and the inspection zone and which inititates the time-of-flight measurements is described. The results graphically illustrate the technique using a one-dimensional FFT computer algorithm (ie. linear backward wave) for an AE image reconstruction

  2. Linear and Generalized Linear Mixed Models and Their Applications

    Jiang, Jiming

    2007-01-01

    This book covers two major classes of mixed effects models, linear mixed models and generalized linear mixed models, and it presents an up-to-date account of theory and methods in analysis of these models as well as their applications in various fields. The book offers a systematic approach to inference about non-Gaussian linear mixed models. Furthermore, it has included recently developed methods, such as mixed model diagnostics, mixed model selection, and jackknife method in the context of mixed models. The book is aimed at students, researchers and other practitioners who are interested

  3. Linfoma no-Hodgkin del sistema nervioso central

    Iglesias Rozas, José Rafael, 1942-

    2000-01-01

    Diecisiete imágenes de un linfoma no-Hodgkin del sistema nervioso central en una paciente de 66 años. Seventeen pictures of a non-Hodgkin lymphoma of the central nervous system in a 66-year-old female patient.

  4. Fertilidad del suelo a largo plazo en sistemas biointensivos

    Funes Monzote, F.R.; Hernándes, A.; Bello, R.; Alvarez, A.

    2008-01-01

    Mejorar y mantener la fertilidad de los suelos son prioridades para los sistemas agroecológicos. Junto a la preservación de la agrodiversidad, el uso eficiente del agua, la energía y otros recursos disponibles, un adecuado balance de nutrientes y vida en el suelo son condiciones importantes para

  5. Seguridad en Sistemas de Información

    Valverde Álvarez, Evangelino

    2012-01-01

    Material de apoyo de la charla "Seguridad en Sistemas de Información (un recorrido a vista de pájaro)" para los alumnos de primer curso de la Escuela Superior de Informática de Ciudad Real (Abril de 2012).

  6. PERSPECTIVAS DO SISTEMA DE TRANSPORTE URBANO DE LONDRINA - PARANÁ

    Mirian Vizintim Fernandes Barros

    2014-03-01

    Full Text Available O artigo propõe indicar os problemas encontrados no atual sistema de transporte urbano na cidade de Londrina - Paraná, marcado pela predominância do uso do transporte individual e do coletivo ineficiente e de alto custo. Para tanto, utilizou-se ferramenta dos Sistemas de Informação Geográfica (SIG para, por meio da manipulação dos dados, confirmar a ideia da intrínseca e necessária integração entre o planejamento do uso e ocupação do solo (sobretudo da densidade demográfica e do transporte urbano, essencial para delinear diretrizes de melhorias no sistema coletivo de deslocamento. Identificado os principais problemas, propostas são traçadas e, algumas perspectivas são discutidas objetivando, além da melhoria no sistema de transporte urbano de Londrina, a reflexão sobre o ideal de uma cidade inclusiva, do ponto de vista dos transportes.

  7. Sistemas transparentes para gobiernos electrónicos eficientes

    Andrade Castro, Jesús Alberto

    2007-05-01

    Full Text Available Este trabajo hace una reflexión crítica del papel que desempeñan los sistemas transparentes en el gobiernoelectrónico. La misión de los sistemas transparentes computarizados es desarrollar aplicaciones confiables y robustas,con el propósito de sustituir la fiscalización y los controles jurídicos y contables del comportamiento administrativo,por verdaderas evaluaciones que incluyan la participación del ciudadano, en el ejercicio transparente de la accióngubernamental. Teniendo como base la necesidad de tener aplicaciones para gobierno electrónico, el Laboratorio deInvestigación de Tecnologías y Sistemas de Información (LITSI de la Facultad de Ciencias de la Universidad del Zuliadesarrolla aplicaciones de minería de texto, para obtener datos que están envueltos en el metalenguaje de etiquetas(HTML contenido en las páginas WEB. Con el prototipo que hemos desarrollado, se ha hecho un intento por convertirinformación desde documentos tipos texto no estructurados que están en la WEB, en información factible de ser analizaday contrastada con las acciones y políticas públicas. Se pretende así, desarrollar sistemas transparentes eficientescon aplicaciones computarizadas que permitan al ciudadano ejercer el control social de la gestión gubernamental.

  8. The Story of Carora: The Origins of El Sistema

    Carlson, Alexandra

    2016-01-01

    Venezuela's youth symphony program, the Fundación Musical Simón Bolívar, commonly referred to as "El Sistema," combines musical achievement with learning important life skills through orchestral practice and performance. Although the history most commonly reported outside Venezuela is of the program's director, José Antonio Abreu,…

  9. Al CERN prima fase sistema gestione dati LHC

    2003-01-01

    "Al via la prima fase per la realizzazione del sistema Lhc computing Grid (LCG), progettato per elaborare le quantita' di dati senza precedenti che, a partire dal 2007, saranno prodotte dagli esperimenti eseguiti con il nuovo grande acceleratore Large Hadron Collider (LHC), presso il Cern di Ginevra" 1 page

  10. Sistema de agua entubada de Cambugán

    Mayorga, O.H.

    2004-01-01

    Los usos principales del agua de Cambugán son lavar ropa y actividades domésticas. Quienes acceden a otro sistema de mejor calidad usan el agua para beber. Hay problemas de sedimentos, mal sabor y olor. Da recomendaciones para educación y otros estudios específicos.

  11. A TEORIA DE SISTEMAS APLICADA À SAÚDE

    Maria Coeli Campedelli

    Full Text Available A autora tece considerações sobre a Teoria de Sistemas e sua aplicação na saúde e faz uma análise sucinta de alguns aspectos desta Teoria que foram abordados na V Conferência Nacional de Saúde, 1975.

  12. Sistema endocanabinoide: modificando los factores de riesgo cardiovascular

    John Edwin Feliciano Alfonso

    2006-10-01

    Full Text Available La necesidad de alcanzar un tratamiento óptimo para el tabaquismo, la obesidad y sus comorbilidades, conocidos factores de riesgo cardiovascular, ha fomentado la búsqueda de objetivos terapéuticos novedosos. Es el caso del sistema endocanabinoide, involucrado en diversos fenómenos fisiológicos entre los que se encuentran el refuerzo de ciertos comportamientos y la regulación del apetito. La sobreactivación de este sistema altera la homeostasis corporal predisponiendo a dependencias o a un aumento en la ingesta alimentaria, lo que puede traducirse en tabaquismo u obesidad. La intervención farmacológica sobre el sistema endocanabinoide puede contribuir al manejo de estos factores de riesgo cardiovascular, teniendo en cuenta que a tales beneficios se suman otros independientes de la suspensión del tabaquismo o la reducción de peso, como el aumento del colesterol de alta densidad, la disminución de triglicéridos y la mejoría del control glucémico en pacientes con diabetes. Ensayos clínicos controlados aleatorizados adelantados en poblaciones con diferentes características, han evaluado la utilidad de la regulación farmacológica del sistema endocanabinoide; confirmando su eficacia en personas con factores de riesgo cardiovascular establecidos.

  13. Proyecto SAFEBUS: Sistemas Avanzados de Seguridad Integral en Autobuses

    Leopoldo Armesto

    2016-01-01

    Full Text Available Resumen: Es bien conocido a partir de estudios previamente realizados, la elevada accidentabilidad de los autobuses urbanos en situaciones de baja velocidad que hacen más necesarios sistemas de asistencia a la conducción. En este sentido, el artículo describe los resultados obtenidos como consecuencia del desarrollo del proyecto “Sistemas Avanzados de Seguridad Integral en Autobuses” (SAFEBUS. Concretamente, se centra en los aspectos de seguridad exterior del autobús, proponiendo un sistema para las situaciones de baja velocidad, paradas o arrancadas del autobús. En él se describen las ideas conceptuales del proyecto y los subsistemas que lo conforman: sistema de detección de personas y sistema avanzado de asistencia al conductor, incluyendo el diseño de dispositivos de realimentación háptica y audio-visual. Así mismo, se detallan los experimentos y validaciones realizados tras la implantación del mismo en autobuses de la compañía Castrosua S.A., los cuales demuestran la capacidad de alertar al conductor y en caso necesario detenerlo en situaciones de peligro. Abstract: It is well known from previous studies, that accidents of buses in urban scenarios, with low speed profiles, make necessary to introduce driving assistance systems. In this sense, this paper describes the results of the SAFEBUS research project “Sistemas Avanzados de Seguridad Integral en Autobuses”. It focuses in safety aspects proposing a system valid at low speed profiles, basically at bus stops. Here, we describe the main ideas exploited in the project and their results, that is, a people detection system together with a driving assistance system with audiovisual and haptic feedback. We also show some experiments and validations carried out at the facilities of Castrosua S.A. company. Keywords: Advance driving assistance systems, people detection, bus safety, Palabras clave: Sistemas de Seguridad Avanzados

  14. O Direito à Saúde no Sistema Prisional

    Gabrielle Jacobi KOLLING

    2013-04-01

    Full Text Available O direito à saúde é objeto de constante análise e, a cada momento, visualiza-se a necessidade de enfrentar diferentes interfaces desse direito fundamental. A complexidade inerente ao sistema social, e, por conseguinte, ao da saúde também, demanda-nos romper com a classificação de cidadãos de primeira e de segunda classe; isso não é republicano, tampouco democrático. A lógica dos desumanizados e excluídos (esquecidos e negligenciados deve ser cambiada pela lógica da inclusão. A análise enfocará a saúde no sistema prisional. Para isso, é condição de possibilidade analisarmos os condicionantes de saúde e os seus efeitos no panorama prisional-sanitário brasileiro. Observaremos, ainda, as ações governamentais para efetivar o direito à saúde no sistema prisional, em especial a Política Pública de Saúde “Plano Nacional de Saúde no Sistema Penitenciário”, que se apresenta como uma tentativa concreta de romper com a negligência do Estado em relação aos integrantes do sistema prisional, aos esquecidos, aos sem voz. ABSTRACT The right to health is matter of constant analysis and, at each moment the need to challenge the different interfaces of this basic right is visible. The innate complexity of the social system and, by consequence to the health system as well, demands that we break with the concept of first and second class citizens; this is not republican or even democratic. The de-humanized and excluded logic (forgotten and neglected must be traded for the inclusion logic. The analysis will focus the prison system’s health. For this is condition of possibility to analyze the health conditions and its effects in the Brazilian prison-sanitary scope. We will also observe the government’s actions to make the right to heath effective in the prison system, in special the Public Health Policy “Nacional Health Plan in the Prison System”, which is presented as a real attempt to break with the state’s negligence

  15. Sistemas Integrales de Gestión para Bibliotecas

    Estefania Gomez Vega

    2016-04-01

    Full Text Available Los Sistemas Integrales de Gestión para Bibliotecas (SIGB, constituyen una herramienta fundamental en el dominio de la educación superior para la óptima gerencia del patrimonio bibliográfico. En este trabajo, se busca determinar cuál de los 2 (dos SIGB candidatos es el más adecuado para heredar las funciones de gestión de las Bibliotecas Académicas de la UNPA. Los SIGB a comparar son los sistemas Koha (reconocido como el primer software de gestión de bibliotecas libre, y PMB (también un software libre que está cobrando gran reconocimiento en numerosos países europeos. Este estudio comparativo se origina básicamente por dos motivos: (i el cambio en la reglamentación vigente producido en 2011 y, como consecuencia, la necesidad de que el sistema utilizado por las Bibliotecas de la UNPA cumpla con esta reglamentación, y (ii la necesidad de aumentar la compatibilidad del sistema instalado para que pueda ser accedido y utilizado en su totalidad desde dispositivos portátiles, tales como celulares y tablets. A tal efecto, el presente trabajo propone un Framework Comparativo para analizar los SIGB candidatos aplicando un conjunto de Criterios de Evaluación, tanto a nivel de sistema, como así también, a nivel de módulo. Los resultados de esta investigación tienen como objetivo asistir y proveer sustento a la selección del SIGB que sea más adecuado a las necesidades de la UNPA.

  16. ALPS: A Linear Program Solver

    Ferencz, Donald C.; Viterna, Larry A.

    1991-01-01

    ALPS is a computer program which can be used to solve general linear program (optimization) problems. ALPS was designed for those who have minimal linear programming (LP) knowledge and features a menu-driven scheme to guide the user through the process of creating and solving LP formulations. Once created, the problems can be edited and stored in standard DOS ASCII files to provide portability to various word processors or even other linear programming packages. Unlike many math-oriented LP solvers, ALPS contains an LP parser that reads through the LP formulation and reports several types of errors to the user. ALPS provides a large amount of solution data which is often useful in problem solving. In addition to pure linear programs, ALPS can solve for integer, mixed integer, and binary type problems. Pure linear programs are solved with the revised simplex method. Integer or mixed integer programs are solved initially with the revised simplex, and the completed using the branch-and-bound technique. Binary programs are solved with the method of implicit enumeration. This manual describes how to use ALPS to create, edit, and solve linear programming problems. Instructions for installing ALPS on a PC compatible computer are included in the appendices along with a general introduction to linear programming. A programmers guide is also included for assistance in modifying and maintaining the program.

  17. Linear and quasi-linear equations of parabolic type

    Ladyženskaja, O A; Ural′ceva, N N; Uralceva, N N

    1968-01-01

    Equations of parabolic type are encountered in many areas of mathematics and mathematical physics, and those encountered most frequently are linear and quasi-linear parabolic equations of the second order. In this volume, boundary value problems for such equations are studied from two points of view: solvability, unique or otherwise, and the effect of smoothness properties of the functions entering the initial and boundary conditions on the smoothness of the solutions.

  18. 100-Mc counting system; Ensemble de comptage a 100 megacycles; Schetnaya sistema na 100 megatsiklov; Sistema contador de 100 megaciclos

    Sugarman, R; Higinbotham, W A; Yonda, A H [Brookhaven National Laboratory, Upton, Long Island, NY (United States)

    1962-04-15

    A complete 100-Mc counting system is described for use in experiments with accelerators. Current-switching logic, using both transistors and germanium tunnel diodes, is used for all high-speed logic. All critical circuits have a rise-time and time-jitter of 2 ns or less. The logical elements are a pulse-height limiter, a discriminator, a multichannel coincidence circuit, a four-fold fanout, and a scale of 8. The fanout enables a limiter or discriminator output to drive any combination of four elements. Each element is a separate plug-in module. Elements are interconnected by a 50-{Omega} cable with at least one termination. Most module inputs and outputs are compatible so that, for example, a discriminator can either drive or be driven from a coincidence circuit by switching cables. To insure reliable high-speed operation and good time and temperature stability the transistors were operated at unity change-gain either in a current-switching mode or in a linear mode as a distributed amplifier. Each tunnel diode provided an additional switching charge-gain of from 2 to 5 with the same stability and bandpass as the transistors. Each module was designed for operation up to a continuous counting rate of 100 megapulses per second. High system duty cycles were made possible by DC interconnections and by double-delay-line clipping for recovery between pulses. No loss in system performance is anticipated for counting rates to 50 Mc. The basic discriminator has a sensitivity adjustable from 2 to 10 mA with a DC-Coupled output of 10 mA at ground potential. Output rise and fall times are 1 ns; pulse width is set by delay cable; maximum output duty cycle is 50% for 95% input recovery. Time jitter from threshold firing to three times that level is 2 ns or less. A more sophisticated version has 10 times the sensitivity. It has a distributed amplifier and a switching chain of two tunnel diodes. Output specifications are the same. Other logic systems for discriminators will also be

  19. Arquitectura para sistemas de memoria organizacional en instituciones de educación superior

    Quilca Condori, Alexander Edwin

    2014-01-01

    El presente trabajo de investigación tiene como objetivo definir una arquitectura para sistemas de Memoria Organizacional en Instituciones de Educación Superior. El objetivo surge del problema identificado, en el cual la construcción de sistemas de gestión del conocimiento es tratada como construcción de sistemas típicos, aplicando métodos iterativos que si bien proporcionan versiones tempranas del sistema, no permiten predecir y gestionar adecuadamente el desarrollo del sistema. Además, d...

  20. Sistema Político Internacional e Globalização: Continuidade ou Rotura?

    Abreu Varanda, Artur Jorge

    2016-01-01

    O presente trabalho realizado no âmbito da unidade currucular - Teoria da relações internacionais - 4º Ano procura identificar os efeitos das Globalização no Sistema Político Internacional. Para tal, é primeiro definido o conceito de Sistema Político Internacional, partindo do conceito de Sistema para chegar à definição de Kenneth Waltz, inserida no Realismo Estruesturalista, sendo ainda explorada a complexidade do sistema. Em seguida, é caracterizada a evolução do Sistema Político Internacio...

  1. En búsqueda del ADN y las influencias en algunos sistemas presidenciales y parlamentarios

    Jorge Carpizo

    2009-01-01

    El trabajo examina las recíprocas influencias entre las Constituciones de seis países: tres con sistema presidencial, dos con sistema parlamentario y uno con sistema semipresidencial. Los tres últimos pertenecen a Europa. Los sistemas presidenciales de América Latina se inspiraron en la Constitución Americana, tanto como en alguna europea, especialmente la española de 1812. Los enormes poderes presidenciales en América Latina llevaron a introducir en el sistema presidencial controles propios ...

  2. En búsqueda del ADN y las influencias en algunos sistemas presidenciales y parlamentarios

    Carpizo, Jorge

    2009-01-01

    El trabajo examina las recíprocas influencias entre las Constituciones de seis países: tres con sistema presidencial, dos con sistema parlamentario y uno con sistema semipresidencial. Los tres últimos pertenecen a Europa. Los sistemas presidenciales de América Latina se inspiraron en la Constitución Americana, tanto como en alguna europea, especialmente la española de 1812. Los enormes poderes presidenciales en América Latina llevaron a introducir en el sistema preside...

  3. The Theory of Linear Prediction

    Vaidyanathan, PP

    2007-01-01

    Linear prediction theory has had a profound impact in the field of digital signal processing. Although the theory dates back to the early 1940s, its influence can still be seen in applications today. The theory is based on very elegant mathematics and leads to many beautiful insights into statistical signal processing. Although prediction is only a part of the more general topics of linear estimation, filtering, and smoothing, this book focuses on linear prediction. This has enabled detailed discussion of a number of issues that are normally not found in texts. For example, the theory of vecto

  4. Correlation and simple linear regression.

    Zou, Kelly H; Tuncali, Kemal; Silverman, Stuart G

    2003-06-01

    In this tutorial article, the concepts of correlation and regression are reviewed and demonstrated. The authors review and compare two correlation coefficients, the Pearson correlation coefficient and the Spearman rho, for measuring linear and nonlinear relationships between two continuous variables. In the case of measuring the linear relationship between a predictor and an outcome variable, simple linear regression analysis is conducted. These statistical concepts are illustrated by using a data set from published literature to assess a computed tomography-guided interventional technique. These statistical methods are important for exploring the relationships between variables and can be applied to many radiologic studies.

  5. Non-linear optical materials

    Saravanan, R

    2018-01-01

    Non-linear optical materials have widespread and promising applications, but the efforts to understand the local structure, electron density distribution and bonding is still lacking. The present work explores the structural details, the electron density distribution and the local bond length distribution of some non-linear optical materials. It also gives estimation of the optical band gap, the particle size, crystallite size, and the elemental composition from UV-Visible analysis, SEM, XRD and EDS of some non-linear optical materials respectively.

  6. Optimal control linear quadratic methods

    Anderson, Brian D O

    2007-01-01

    This augmented edition of a respected text teaches the reader how to use linear quadratic Gaussian methods effectively for the design of control systems. It explores linear optimal control theory from an engineering viewpoint, with step-by-step explanations that show clearly how to make practical use of the material.The three-part treatment begins with the basic theory of the linear regulator/tracker for time-invariant and time-varying systems. The Hamilton-Jacobi equation is introduced using the Principle of Optimality, and the infinite-time problem is considered. The second part outlines the

  7. Complejidad y sistemas complejos Complexidade e sistemas complexos Complexity and complex systems

    Mario Tarride

    1995-06-01

    Full Text Available O pensamento sistêmico e a complexidade revestem-se de especial interesse para a compreensão dos mais diferentes tipos de fenômenos. A necessidade de usar complementarmente análise e síntese, a avaliação da realidade de maneira holística, onde a convivência com a complexidade é um fato que se aceita e não se nega através do reducionismo, assim como o surgimento da ordem a partir do caos e a participação ativa do 'modelizador de sistemas' no desenho de artefatos a partir da linguagem, são alguns dos materiais que compõem este particular esforço de síntese do pensamento de determinados autores.Systemic thinking and complexity are of special interest when it comes to understanding a wide spectrum of phenomena. The present paper synthesizes some authors' ideas regarding a number of topics in this area: the need to use analysis and synthesis complementarity; the holistic evaluation of reality, where living with complexity is an accepted fact, not negated through reductionism; the emergence of order from chaos; and the active participation of a 'model-creator' in the design of artifacts from language.

  8. PRESENTACIÓN DE LA CARRERA DE INGENIERÍA DE SISTEMAS

    EDGAR SERNA MONTOYA

    2009-06-01

    Full Text Available En el año 2009 la Facultad cuenta con los siguientes programas activos:* Pregrado en Ingeniería de Sistemas Presencial Registro Calificado Código SNIES 11846 Resolución No. 2293 del 03 de octubre de 2002. Título que otorga: Doble titulación, Ingeniero de Sistemas y Tecnólogo en Sistemas.* Ciclo de Profesionalización para Tecnólogos en Sistemas Presencial Título que otorga: Ingeniero de Sistemas.* Tecnología en Sistemas de Información Presencial Registro Calificado Código SNIES 11850 Título que otorga: Tecnólogo en Sistemas de Información.* Especialización en Gerencia de la Tecnología Presencial Registro Calificado Código SNIES 53168 Título que otorga: Especialista en gerencia de la Tecnología.

  9. Cellular Automata Rules and Linear Numbers

    Nayak, Birendra Kumar; Sahoo, Sudhakar; Biswal, Sagarika

    2012-01-01

    In this paper, linear Cellular Automta (CA) rules are recursively generated using a binary tree rooted at "0". Some mathematical results on linear as well as non-linear CA rules are derived. Integers associated with linear CA rules are defined as linear numbers and the properties of these linear numbers are studied.

  10. Feedback systems for linear colliders

    Hendrickson, L; Himel, Thomas M; Minty, Michiko G; Phinney, N; Raimondi, Pantaleo; Raubenheimer, T O; Shoaee, H; Tenenbaum, P G

    1999-01-01

    Feedback systems are essential for stable operation of a linear collider, providing a cost-effective method for relaxing tight tolerances. In the Stanford Linear Collider (SLC), feedback controls beam parameters such as trajectory, energy, and intensity throughout the accelerator. A novel dithering optimization system which adjusts final focus parameters to maximize luminosity contributed to achieving record performance in the 1997-98 run. Performance limitations of the steering feedback have been investigated, and improvements have been made. For the Next Linear Collider (NLC), extensive feedback systems are planned as an intregal part of the design. Feedback requiremetns for JLC (the Japanese Linear Collider) are essentially identical to NLC; some of the TESLA requirements are similar but there are significant differences. For NLC, algorithms which incorporate improvements upon the SLC implementation are being prototyped. Specialized systems for the damping rings, rf and interaction point will operate at hi...

  11. An introduction to linear algebra

    Mirsky, L

    2003-01-01

    Rigorous, self-contained coverage of determinants, vectors, matrices and linear equations, quadratic forms, more. Elementary, easily readable account with numerous examples and problems at the end of each chapter.

  12. CLIC: developing a linear collider

    Laurent Guiraud

    1999-01-01

    Compact Linear Collider (CLIC) is a CERN project to provide high-energy electron-positron collisions. Instead of conventional radio-frequency klystrons, CLIC will use a low-energy, high-intensity primary beam to produce acceleration.

  13. 1988 linear accelerator conference proceedings

    1989-06-01

    This report contains papers presented at the 1988 Linear Accelerator Conference. A few topics covered are beam dynamics; beam transport; superconducting components; free electron lasers; ion sources; and klystron research

  14. CERN balances linear collider studies

    ILC Newsline

    2011-01-01

    The forces behind the two most mature proposals for a next-generation collider, the International Linear Collider (ILC) and the Compact Linear Collider (CLIC) study, have been steadily coming together, with scientists from both communities sharing ideas and information across the technology divide. In a support of cooperation between the two, CERN in Switzerland, where most CLIC research takes place, recently converted the project-specific position of CLIC Study Leader to the concept-based Linear Collider Study Leader.   The scientist who now holds this position, Steinar Stapnes, is charged with making the linear collider a viable option for CERN’s future, one that could include either CLIC or the ILC. The transition to more involve the ILC must be gradual, he said, and the redefinition of his post is a good start. Though not very much involved with superconducting radiofrequency (SRF) technology, where ILC researchers have made significant advances, CERN participates in many aspect...

  15. Linear Methods for Image Interpolation

    Pascal Getreuer

    2011-01-01

    We discuss linear methods for interpolation, including nearest neighbor, bilinear, bicubic, splines, and sinc interpolation. We focus on separable interpolation, so most of what is said applies to one-dimensional interpolation as well as N-dimensional separable interpolation.

  16. Ada Linear-Algebra Program

    Klumpp, A. R.; Lawson, C. L.

    1988-01-01

    Routines provided for common scalar, vector, matrix, and quaternion operations. Computer program extends Ada programming language to include linear-algebra capabilities similar to HAS/S programming language. Designed for such avionics applications as software for Space Station.

  17. Acoustic emission linear pulse holography

    Collins, H.D.; Busse, L.J.; Lemon, D.K.

    1983-10-25

    This device relates to the concept of and means for performing Acoustic Emission Linear Pulse Holography, which combines the advantages of linear holographic imaging and Acoustic Emission into a single non-destructive inspection system. This unique system produces a chronological, linear holographic image of a flaw by utilizing the acoustic energy emitted during crack growth. The innovation is the concept of utilizing the crack-generated acoustic emission energy to generate a chronological series of images of a growing crack by applying linear, pulse holographic processing to the acoustic emission data. The process is implemented by placing on a structure an array of piezoelectric sensors (typically 16 or 32 of them) near the defect location. A reference sensor is placed between the defect and the array.

  18. Control Basado en Eventos de Sistemas de Primer Orden Con Retardo

    Ángel Ruiz

    2013-07-01

    Full Text Available Resumen: La teoría de control PID en su vertiente discreta, apoyándose en una gestión periódica de los muestreos (eventos planificados en tiempo se considera un área madura dentro del paradigma del control automático. Por el contrario, la planificación por eventos deriva, casi inevitablemente, en muestreos asíncronos planteando, problemas adicionales que necesitan ser caracterizados y estudiados. Bajo este escenario, aspectos como la sintonía de los controladores y las condiciones para la estabilidad global o la ausencia de ciclos límite siguen siendo temas que todavía están lejos de ser completamente resueltos. Con el trabajo actual se presenta un nuevo esquema de muestreo y control basado en eventos para sistemas de primer orden con retardo para el que se han analizado los aspectos anteriores. El esquema se basa en el Predictor de Smith para la compensación de los retardos, y en el algoritmo de muestreo SSOD (Symmetric Send- On-Delta para la generación de los eventos. En base a este esquema, se desarrolla el análisis de estabilidad y se propone una metodología de sintonía con una interpretación intuitiva y eficaz. Abstract: PID control theory based on periodic managing of samples has become a well-known area in automatic control. Asynchronous sampling inherent to event-based scheduling causes non-linear dynamics. Under this situation, complex problems arise that must be studied. Issues such as controller tuning, conditions for global stability and the absence of limit cycles are topics that are far from being fully solved yet. In this work, a new event-based scheme of sampling and control for FOPTD processes is presented. The scheme is based on the Smith Predictor structure for delay compensation and the SSOD (Symmetric-Send-On- Delta scheme for events generation. By means of the proposed scheme, a stability analysis is addressed and a simple tuning methodology with effective interpretation is proposed. Palabras clave

  19. Estabilidad de sistemas Takagi-Sugeno bajo perturbaciones persistentes: estimación de conjuntos inescapables

    J.L. Pitarch

    2015-10-01

    Full Text Available Resumen: El presente trabajo analiza el comportamiento de sistemas borrosos Takagi-Sugeno ante perturbaciones persistentes (caracterizadas bien por cotas conocidas de amplitud o de potencia en media cuadrática. El análisis se centra en validar que, ante una determinada cota de potencia de perturbaciones y región de condiciones iniciales, existe una región inescapable (contenida en la región donde el modelo TS es válido como modelo de un sistema no lineal subyacente. Algunos de los problemas planteados se formulan como problemas de desigualdades matriciales lineales (LMI, posibles de resolver de forma óptima por programación semidefinida, y otros serán productos de matrices variables de decisión y dos escalares (BMI, que son resueltos de forma iterativa. Abstract: The present work analizes the behaviour of Takagi-Sugeno fuzzy systems in front of non-vanishing disturbances (characterized by known amplitude or quadratic-mean power bounds. Such analysis is focused in validating that, in front of a specific disturbance bound and an initial-condition region, there exist an inescapable region (contained in the region where the TS model is valid as a model of the underlying nonlinear system. Some of the stated problems here are cast as linear matrix inequality problems (LMI, efficiently solvable by semidefinite programming. Others, however, will involve nonconvex products of decision-variable matrices and two scalars (BMI, which are solved in an iterative way. Palabras clave: Takagi-Sugeno, Rechazo a perturbaciones, Conjunto inescapable, Estabilidad local, LMI, Perturbaciones persistentes., Keywords: Takagi-Sugeno, Disturbance rejection, Inescapable set, Local stability, LMI, Nonvanishing disturbances.

  20. Functionalized linear and cyclic polyolefins

    Tuba, Robert; Grubbs, Robert H.

    2018-02-13

    This invention relates to methods and compositions for preparing linear and cyclic polyolefins. More particularly, the invention relates to methods and compositions for preparing functionalized linear and cyclic polyolefins via olefin metathesis reactions. Polymer products produced via the olefin metathesis reactions of the invention may be utilized for a wide range of materials applications. The invention has utility in the fields of polymer and materials chemistry and manufacture.

  1. Some new ternary linear codes

    Rumen Daskalov

    2017-07-01

    Full Text Available Let an $[n,k,d]_q$ code be a linear code of length $n$, dimension $k$ and minimum Hamming distance $d$ over $GF(q$. One of the most important problems in coding theory is to construct codes with optimal minimum distances. In this paper 22 new ternary linear codes are presented. Two of them are optimal. All new codes improve the respective lower bounds in [11].

  2. Explorative methods in linear models

    Høskuldsson, Agnar

    2004-01-01

    The author has developed the H-method of mathematical modeling that builds up the model by parts, where each part is optimized with respect to prediction. Besides providing with better predictions than traditional methods, these methods provide with graphic procedures for analyzing different feat...... features in data. These graphic methods extend the well-known methods and results of Principal Component Analysis to any linear model. Here the graphic procedures are applied to linear regression and Ridge Regression....

  3. Polarized Electrons for Linear Colliders

    Clendenin, J.

    2004-01-01

    Future electron-positron linear colliders require a highly polarized electron beam with a pulse structure that depends primarily on whether the acceleration utilizes warm or superconducting rf structures. The International Linear Collider (ILC) will use cold structures for the main linac. It is shown that a dc-biased polarized photoelectron source such as successfully used for the SLC can meet the charge requirements for the ILC micropulse with a polarization approaching 90%

  4. Proposal of development of an advanced IORT system; Proposta di sviluppo di un sistema IORT di avanguardia

    Ronsivalle, C. [ENEA, Centro Ricerche Frascati, Rome (Italy). Unita tecnico scientifica Tecnologie Fisiche Avanzate; Casali, F. [Bologna Univ., Bologna (Italy), Dipartimento di fisica; Colavita, E. [Calabria Univ., Arcavacata (Italy). Diparimento di fisica; Lamanna, E. [Magna Graecia Univ., Germaneto (Italy). Dipartimento di medicina sperimentale e clinica

    2005-07-15

    In the last years there has been an increasing interest on IORT (Intraoperative Radiation Therapy), also because of the development of dedicated accelerators. This technique represents a very effective oncological treatment consisting in delivering a single high dose on a tumour bed soon after surgery resection. In the following we present the proposal of development of a last generation IORT system based on the use of a linear accelerator with variable energy in the range 3-15 MeV, operating in C band (5712 MHz). Respect to the accelerator used in the commercial IORT systems operating at a typical frequency of 2998 MHz (S band) limited to a maximum energy of 12 MeV, the use of a higher RF frequency allows an increase of the maximum energy. This extends the use of the IORT technique to a wider field of tumors and an improvement of the system in terms of compactness and weight reduction. In addition the machine will be provided with a devoted absolute dosimetry system that will strongly simplify the procedures of dosimetric characterization. We intend to develop the system by a collaboration between ENEA, some Universities (Bologna, Catanzaro and Cosenza) and the national industry. [Italian] Negli ultimi anni si e sviluppato un sempre maggior interesse intorno alla Radioterapia IntraOperatoria (IORT), una particolare tecnica radioterapica che permette di irradiare la zona interessata da un tumore durante un intervento chirurgico utilizzando un fascio di elettroni prodotto da un acceleratore. La diffusione di questa metodica e stata favorita dalla presenza sul mercato di acceleratori installabili direttamente in sala operatoria. Come conseguenza di questa disponibilita sono emerse sia nuove esigenze legate alle particolari applicazioni cliniche, sia richieste di facilita di utilizzo e perfomances sempre piu sofisticate. Viene qui presentata una proposta di sviluppo di un sistema IORT di ultima generazione basato sull'utilizzo di un acceleratore lineare con

  5. Proposal of development of an advanced IORT system; Proposta di sviluppo di un sistema IORT di avanguardia

    Ronsivalle, C [ENEA, Centro Ricerche Frascati, Rome (Italy). Unita tecnico scientifica Tecnologie Fisiche Avanzate; Casali, F [Bologna Univ., Bologna (Italy), Dipartimento di fisica; Colavita, E [Calabria Univ., Arcavacata (Italy). Diparimento di fisica; Lamanna, E [Magna Graecia Univ., Germaneto (Italy). Dipartimento di medicina sperimentale e clinica

    2005-07-15

    In the last years there has been an increasing interest on IORT (Intraoperative Radiation Therapy), also because of the development of dedicated accelerators. This technique represents a very effective oncological treatment consisting in delivering a single high dose on a tumour bed soon after surgery resection. In the following we present the proposal of development of a last generation IORT system based on the use of a linear accelerator with variable energy in the range 3-15 MeV, operating in C band (5712 MHz). Respect to the accelerator used in the commercial IORT systems operating at a typical frequency of 2998 MHz (S band) limited to a maximum energy of 12 MeV, the use of a higher RF frequency allows an increase of the maximum energy. This extends the use of the IORT technique to a wider field of tumors and an improvement of the system in terms of compactness and weight reduction. In addition the machine will be provided with a devoted absolute dosimetry system that will strongly simplify the procedures of dosimetric characterization. We intend to develop the system by a collaboration between ENEA, some Universities (Bologna, Catanzaro and Cosenza) and the national industry. [Italian] Negli ultimi anni si e sviluppato un sempre maggior interesse intorno alla Radioterapia IntraOperatoria (IORT), una particolare tecnica radioterapica che permette di irradiare la zona interessata da un tumore durante un intervento chirurgico utilizzando un fascio di elettroni prodotto da un acceleratore. La diffusione di questa metodica e stata favorita dalla presenza sul mercato di acceleratori installabili direttamente in sala operatoria. Come conseguenza di questa disponibilita sono emerse sia nuove esigenze legate alle particolari applicazioni cliniche, sia richieste di facilita di utilizzo e perfomances sempre piu sofisticate. Viene qui presentata una proposta di sviluppo di un sistema IORT di ultima generazione basato sull'utilizzo di un acceleratore lineare con energia

  6. Selección e implantación de un sistema ERP de código abierto

    Fuertes García, Sonia

    2013-01-01

    En este Trabajo Fin de Carrera estudiaremos el proceso de implantación de un sistema de planificación de recursos empresariales (sistema ERP) de código abierto en una empresa previamente definida. El proceso abarca tanto la selección entre los diversos sistemas ERP de código abierto disponibles actualmente en el mercado, como la implantación del sistema. El sistema ERP elegido es un sistema en la nube. En aquest Treball Fi de Carrera estudiarem el procés d'implantació d'un sistema de plani...

  7. LA REFORMA DEL SISTEMA GENERAL DE SEGURIDAD SOCIAL EN SALUD

    Gustavo Malagón Londoño

    2011-01-01

    Full Text Available

    La Academia Nacional de Medicina de Colombia en repetidas ocasiones, desde el año 1998, ha denunciado las notables defi ciencias del Sistema General de Seguridad Social en Salud (SGSSS que implantó la Ley 100 de diciembre 23 de 1993. 

    El SGSSS, que debiera ser sistema de aseguramiento con propósito social, se ha convertido en negocio donde priman los intereses económicos con descuido en la calidad de los servicios; hizo profunda crisis, principalmente por causa de los excesivos costos que conlleva el modelo de intermediación comercial. Se ha creado una inaceptable posición oligopólica dominante de los aseguradores, que parece haber suplantado al estado en la defi nición de las políticas y en la orientación del SGSSS e interfiere la buena prestación de los servicios. Manifestación prominente de esto es la creciente y descontrolada integración vertical. 

    El sistema colombiano de intermediación comercial es costoso, inequitativo, ineficiente y va contra los principios constitucionales que definen la salud como derecho humano, en detrimento del bien común.

    El SGSSS, a los 18 años de su implantación, aún no cuenta con un sistema de información y las bases de datos existentes en las EPS, y también en el FOSYGA, distan de ser confiables. Se reconoce que un sistema de salud es en esencia un sistema de información. Los hospitales y clínicas de Colombia, especialmente las instituciones de carácter público, tienen una cartera que, se estima, es cinco o seis veces mayor que la cartera reclamada por las EPS, buena parte de la cual ya es de difícil cobro. Sin embargo, la prioridad ha sido resolver el problema económico de las EPS, no el de los hospitales.

    Son muchas las voces que claman por un riguroso control de la manera como las EPS invierten los recursos de la salud, de carácter público por ser recursos parafiscales. Las EPS muestran un grande y rápido crecimiento patrimonial y han

  8. Primordial black holes in linear and non-linear regimes

    Allahyari, Alireza; Abolhasani, Ali Akbar [Department of Physics, Sharif University of Technology, Tehran (Iran, Islamic Republic of); Firouzjaee, Javad T., E-mail: allahyari@physics.sharif.edu, E-mail: j.taghizadeh.f@ipm.ir [School of Astronomy, Institute for Research in Fundamental Sciences (IPM), P.O. Box 19395-5531, Tehran (Iran, Islamic Republic of)

    2017-06-01

    We revisit the formation of primordial black holes (PBHs) in the radiation-dominated era for both linear and non-linear regimes, elaborating on the concept of an apparent horizon. Contrary to the expectation from vacuum models, we argue that in a cosmological setting a density fluctuation with a high density does not always collapse to a black hole. To this end, we first elaborate on the perturbation theory for spherically symmetric space times in the linear regime. Thereby, we introduce two gauges. This allows to introduce a well defined gauge-invariant quantity for the expansion of null geodesics. Using this quantity, we argue that PBHs do not form in the linear regime irrespective of the density of the background. Finally, we consider the formation of PBHs in non-linear regimes, adopting the spherical collapse picture. In this picture, over-densities are modeled by closed FRW models in the radiation-dominated era. The difference of our approach is that we start by finding an exact solution for a closed radiation-dominated universe. This yields exact results for turn-around time and radius. It is important that we take the initial conditions from the linear perturbation theory. Additionally, instead of using uniform Hubble gauge condition, both density and velocity perturbations are admitted in this approach. Thereby, the matching condition will impose an important constraint on the initial velocity perturbations δ {sup h} {sub 0} = −δ{sub 0}/2. This can be extended to higher orders. Using this constraint, we find that the apparent horizon of a PBH forms when δ > 3 at turn-around time. The corrections also appear from the third order. Moreover, a PBH forms when its apparent horizon is outside the sound horizon at the re-entry time. Applying this condition, we infer that the threshold value of the density perturbations at horizon re-entry should be larger than δ {sub th} > 0.7.

  9. Evaluación de un sistema experimental de acuaponia

    M. García-Ulloa

    2005-01-01

    Full Text Available Se evaluó un sistema experimental de acuaponia, incorporando la producción de tilapia (Oreochromis mossambicus y pepino (Cucumis sativus durante 75 días. Los peces (90 g de peso promedio inicial se mantuvieron en un tanque de 500 l, a una densidad de 0.6 peces/litro, mientras que 40 plántulas de pepino se sembraron en 2 camas de arena estéril. Las plantas se regaron con agua de desecho de las tilapias, con un sistema de recirculación de agua. Cada semana se registraron las concentraciones de amonia no ionizada, nitritios y nitratos. Al final del cultivo, los peces crecieron 25 g, en promedio, y se produjeron casi 5 kg de pepino. Las curvas de compuestos nitrogenados mostraron un flujo de nutrientes para las plantas y aporte de agua sin niveles peligrosos de amonia y nitritos para los peces.

  10. Sistema inteligente para evaluación de programas tutores

    Luz Daicy Alvarado

    2002-01-01

    Full Text Available El mecanismo evaluador que se presenta a continuación forma parte de un proyecto que busca el desarrollo de un Sistema de enseñanza asistida por ordenador (EAO basado en tutores inteligentes. Se pretende que este mecanismo, basado en herramientas de «aprendizaje automático», tenga la capacidad para capturar una «imagen» que indique el grado de comprensión de la materia por parte del alumno e identifique los aspectos en los que el estudiante tiene dificultades. Con esa información se retroalimentará a un sistema tutor de manera que este último tome una decisión acerca de la estrategia educativa por seguir.

  11. VPLIV ELEKTRIČNIH VOZIL NA ZANESLJIVOST ELEKTROENERGETSKEGA SISTEMA

    BOŽIČ, DUŠAN

    2017-01-01

    Zagotavljanje zanesljive oskrbe odjemalcev z električno energijo predstavlja primarno nalogo elektroenergetskih sistemov, na kar kaže tudi spreminjanje načina regulacije sistemskih operaterjev v dereguliranih trgih z električno energijo. Regulatorji pri regulaciji sistemskih operaterjev namreč vse pogosteje uvajajo regulacijo kakovosti dobave električne energije, ki v ospredje postavlja prav zanesljivost sistema. Prihodki sistemskih operaterjev so pri regulaciji kakovosti dobave električne en...

  12. TEORÍA DE SISTEMAS EN LAS ORGANIZACIONES

    Alejandro Hernández Lugo

    2003-01-01

    Reflejar y caracterizar dos puntos de vista con los que se pueden enfocar y administrar el trabajo en una empresa, y conocer las ventajas y desventajas que tiene una visión respecto a la otra puede ser un buen comienzo para aplicar la teoría de sistemas en las organizaciones.

  13. Enfermedades poco comunes: una prioridad de los sistemas de salud

    RAP

    2017-01-01

    Las enfermedades poco comunes, incluidas las de origen genético, son aquellas enfermedades que tienen una prevalencia baja, menor de 5 casos por cada 10.000 habitantes en la comunidad, según la definición de la Unión Europea. Estas enfermedades tienen ciertas características comunes. Son, en su mayor parte, degenerativas y constituyen una prioridad de los sistemas de salud.

  14. LA DIVERSIDAD DE ESPECIES ÚTILES Y SISTEMAS AGROFORESTALES.

    Hermilio Navarro Garza

    2012-01-01

    Full Text Available El manejo y uso de biodiversidad sustentan servicios agroecosistémicos multifuncionales: aprovisionamiento de alimentos, forrajes, leña, madera, combustibles, fibra y recarga de acuíferos, entre otros. La pérdida de diversidad biológica y los riesgos crecientes de su deterioro, inherentes frecuentemente a diversas actividades humanas, plantean la necesidad de desarrollar capacidades institucionales y sociales para su restauración y conservación. El objetivo de este trabajo fue identificar y describir la diversidad de árboles y arbustos, sus usos y tipos de sistemas agroforestales. Lo importante es conocer la multiplicidad de usos, como expresión sintética de lógicas funcionales que viabilizan los sistemas agroforestales territoriales. La metodología fue descriptiva, basada en talleres participativos orientados a conocer la diversidad de recursos y usos. Posteriormente, selección de unidades familiares, transectos, entrevistas, colecta y clasificación de ejemplares. Se identificaron 81 especies y 34 familias. La diversidad se amplifica por la multifuncionalidad de usos para 55.6 % de especies: 7.42 %, con cinco tipos de usos; 11.1 % con cuatro tipos; 14.8 %, con tres; y 22.2 % con dos. Tipos de usos: leña, 41 especies; medicinales, 30; elaboración de utensilios, 29; madera, 25; fines alimenticios, 23; forrajeras, 20, y cercos vivos, seis especies. De los sistemas familiares, 91.7 % utilizan sistemas agrosilvícolas, y 41.7 %, silvopastoriles, según diversos propósitos socioeconómicos y combinaciones de usos.

  15. Intervencion psicoeducativa en adolescentes con tumores del sistema nerviosos central

    Grau Rubio, Claudia; Hernández Núñez-Polo, Mercedes

    2002-01-01

    Se describen los resultados de la evaluación neuropsicológica y de un programa de intervención psicoeducativa y apoyo emocional aplicados a 5 adolescentes afectados por un tumor del sistema nervioso central. Este programa se desarrolló en ASION (Asociación de padres de niños enfermos de cáncer de la Comunidad de Madrid).

  16. Bifurcaciones del Sistema de FitzHugh-Nagumo (FHN

    Fernando Ongay Larios

    2011-01-01

    Full Text Available La familia paramétrica de los sistemas de FitzHugh-Nagumo es rica en bifurcaciones (Rocsoreanu et al., 2000. En este artículo estudiamos las bifurcaciones silla-nodo y de Hopf desde el punto de vista matemático de esta familia y se describen completamente los conjuntos de bifurcación en el espacio de parámetros.

  17. Prefabricación en madera. El sistema H B

    Editorial, Equipo

    2017-01-01

    Los elementos HB constituyen una nueva forma de empleo de la madera en la construcción de pabellones industriales. El elemento HB fundamental se compone de una sección "I", en la cual tanto el alma como las alas están formadas por secciones normales de madera, cuyas fuerzas internas se transmiten por un sistema combinado de encolado y clavado.

  18. El Sistema de Referencia Celeste convencional de la IAU

    Arias, E. F.

    La Unión Astronómica Internacional (IAU) recomendó la adopción de un nuevo sistema de referencia celeste baricéntrico cuyo plano fundamental y origen de ascensiones rectas estén próximos, respectivamente, al ecuador y equinoccio dinámicos J2000.0. El nuevo sistema de referencia estará materializado por las posiciones J2000.0 de radiofuentes extragalácticas determinadas con la técnica de interferometría de larga línea de base (VLBI). El Working Group on Reference Frames de la IAU (WGRF) decidió adoptar (Grasse, 1995) al sistema de referencia celeste extragaláctico del Servicio Internacional de la Rotación Terrestre (IERS) como futuro sistema de referencia celeste convencional bajo el nombre International Celestial Reference System (ICRS) y encomendó su mantenimiento futuro al IERS. El marco de referencia que materializará al ICRS contiene posiciones precisas J2000.0 de más de 600 radiofuentes extragalácticas. Las coordenadas fueron ajustadas en una única solución VLBI en la cual se incluyeron todas las observaciones realizadas hasta octubre de 1995 con la técnica de adquisición de datos VLBI Mark III. Para minimizar los errores sistemáticos que pueden afectar la calidad del marco de referencia se introdujeron mejoras sustanciales en la modelización y en la selección de datos. Un subconjunto de objetos del marco de referencia se utilizó para referir las posiciones estelares determinadas con el satélite astrométrico Hipparcos al ICRS.

  19. Modelo de Comportamiento Afectivo para Sistemas Tutores Inteligentes

    Hernández Pérez, María Y.

    2008-01-01

    Las emociones se han reconocido como parte fundamental de la motivación, y la motivación como un componente indispensable en el aprendizaje. En este documento se propone un modelo de comportamiento afectivo para sistemas tutores inteligentes. Dicho modelo combina el estado afectivo y pedagógico de los estudiantes para establecer las acciones tutoriales. En el contexto de este trabajo, el comportamiento afectivo tiene dos funciones principales: 1) inferir el estado afectivo del estudiante; y 2...

  20. Intelligent tutorial system for selftraining in tuning of control systems; Sistema tutorial inteligente para el autoentrenamiento en sintonizacion de sistemas de control

    Romero Jimenez, Guillermo; Perez Ocampo, Maria Concepcion [Instituto de Investigaciones Electricas, Temixco, Morelos (Mexico)

    1999-07-01

    In this paper the design, development and validation of an intelligent tutorial system oriented to the instruction of techniques of tuning of control systems is described. This system is based on systems previously developed in the Simulation Unit of the Instituto de Investigaciones Electricas (IIE). The designed system accounts with four modules: of knowledge, the student model, of tutor and of interface, basic characteristics that allows to locate this system in the context of the intelligent tutorial systems. In this system in particular, the knowledge module was only modified, because advantage is taken of the existing structure to incorporate a new dominion of application: the one of the techniques of tuning of control systems. The system maintains the characteristic that it can also be used as a consultation system. In addition to the design and validation of the tutorial system, when following the methodology of processing the degree of generality of the developed system, was evaluated, taking into account the evaluation and quantification of metrics that the engineering software proposes. [Spanish] En este trabajo se describen el diseno, el desarrollo y la validacion de un sistema tutorial inteligente orientado a la instruccion de tecnicas de sintonizacion de sistemas de control. Este sistema esta basado en sistemas desarrollados anteriormente en la Unidad de Simulacion del Instituto de Investigaciones Electricas (IIE). El sistema disenado cuenta con cuatro modulos: de conocimiento, del modelo del estudiante, de tutor y de interfaz, caracteristica principal que permite ubicar a este sistema en el contexto de los sistemas tutoriales inteligentes. En este sistema en particular solo se modifica el modulo de conocimiento, pues se aprovecha la estructura existente para incorporar un nuevo dominio de aplicacion: el de las tecnicas de sintonizacion de sistemas de control. El sistema mantiene la caracteristica de que tambien puede utilizarse como un sistema de

  1. The linear-non-linear frontier for the Goldstone Higgs

    Gavela, M.B.; Saa, S.; Kanshin, K.; Machado, P.A.N.

    2016-01-01

    The minimal SO(5)/SO(4) σ-model is used as a template for the ultraviolet completion of scenarios in which the Higgs particle is a low-energy remnant of some high-energy dynamics, enjoying a (pseudo) Nambu-Goldstone-boson ancestry. Varying the σ mass allows one to sweep from the perturbative regime to the customary non-linear implementations. The low-energy benchmark effective non-linear Lagrangian for bosons and fermions is obtained, determining as well the operator coefficients including linear corrections. At first order in the latter, three effective bosonic operators emerge which are independent of the explicit soft breaking assumed. The Higgs couplings to vector bosons and fermions turn out to be quite universal: the linear corrections are proportional to the explicit symmetry-breaking parameters. Furthermore, we define an effective Yukawa operator which allows a simple parametrization and comparison of different heavy-fermion ultraviolet completions. In addition, one particular fermionic completion is explored in detail, obtaining the corresponding leading low-energy fermionic operators. (orig.)

  2. Advanced statistics: linear regression, part II: multiple linear regression.

    Marill, Keith A

    2004-01-01

    The applications of simple linear regression in medical research are limited, because in most situations, there are multiple relevant predictor variables. Univariate statistical techniques such as simple linear regression use a single predictor variable, and they often may be mathematically correct but clinically misleading. Multiple linear regression is a mathematical technique used to model the relationship between multiple independent predictor variables and a single dependent outcome variable. It is used in medical research to model observational data, as well as in diagnostic and therapeutic studies in which the outcome is dependent on more than one factor. Although the technique generally is limited to data that can be expressed with a linear function, it benefits from a well-developed mathematical framework that yields unique solutions and exact confidence intervals for regression coefficients. Building on Part I of this series, this article acquaints the reader with some of the important concepts in multiple regression analysis. These include multicollinearity, interaction effects, and an expansion of the discussion of inference testing, leverage, and variable transformations to multivariate models. Examples from the first article in this series are expanded on using a primarily graphic, rather than mathematical, approach. The importance of the relationships among the predictor variables and the dependence of the multivariate model coefficients on the choice of these variables are stressed. Finally, concepts in regression model building are discussed.

  3. The linear-non-linear frontier for the Goldstone Higgs

    Gavela, M.B.; Saa, S. [IFT-UAM/CSIC, Universidad Autonoma de Madrid, Departamento de Fisica Teorica y Instituto de Fisica Teorica, Madrid (Spain); Kanshin, K. [Universita di Padova, Dipartimento di Fisica e Astronomia ' G. Galilei' , Padua (Italy); INFN, Padova (Italy); Machado, P.A.N. [IFT-UAM/CSIC, Universidad Autonoma de Madrid, Departamento de Fisica Teorica y Instituto de Fisica Teorica, Madrid (Spain); Fermi National Accelerator Laboratory, Theoretical Physics Department, Batavia, IL (United States)

    2016-12-15

    The minimal SO(5)/SO(4) σ-model is used as a template for the ultraviolet completion of scenarios in which the Higgs particle is a low-energy remnant of some high-energy dynamics, enjoying a (pseudo) Nambu-Goldstone-boson ancestry. Varying the σ mass allows one to sweep from the perturbative regime to the customary non-linear implementations. The low-energy benchmark effective non-linear Lagrangian for bosons and fermions is obtained, determining as well the operator coefficients including linear corrections. At first order in the latter, three effective bosonic operators emerge which are independent of the explicit soft breaking assumed. The Higgs couplings to vector bosons and fermions turn out to be quite universal: the linear corrections are proportional to the explicit symmetry-breaking parameters. Furthermore, we define an effective Yukawa operator which allows a simple parametrization and comparison of different heavy-fermion ultraviolet completions. In addition, one particular fermionic completion is explored in detail, obtaining the corresponding leading low-energy fermionic operators. (orig.)

  4. Sistema setorial de inovação na indústria química de Alagoas

    Sra Peixoto Peixoto

    2009-08-01

    Full Text Available No atual cenário de competição, o desempenho dos sistemas de inovação está, em grande medida, associado à intensidade e à eficácia das interações entre os diferentes atores envolvidos na geração e difusão de novos conhecimentos e novas tecnologias. O objetivo deste trabalho é analisar as interações e as articulações tecnológicas entre empresas e demais organizações que compõem o sistema setorial de inovação na indústria química do Estado de Alagoas. Na construção do objetivo deste artigo, foi realizada uma pesquisa descritiva e censitária. A análise de dados foi realizada com o uso de técnicas estatísticas não-paramétricas: coeficiente de concordância W de Kendall para verificar a correlação entre as três dimensões existentes (Organizações, Tecnologias e Instituições e o coeficiente de correlação Rho de Spearman em razão da relação linear.  O estudo revela o quanto essa indústria apresenta interação positiva entre o desenvolvimento de tecnologias, as organizações que as desenvolvem e as instituições que regulam o uso da tecnologia, comprovando os elementos propostos na teoria. Como contribuição adicional, este artigo descreveu uma revisão e uma aplicação prática sobre o fenômeno da inovação e sua ligação com os sistemas setoriais.

  5. Linearization: Geometric, Complex, and Conditional

    Asghar Qadir

    2012-01-01

    Full Text Available Lie symmetry analysis provides a systematic method of obtaining exact solutions of nonlinear (systems of differential equations, whether partial or ordinary. Of special interest is the procedure that Lie developed to transform scalar nonlinear second-order ordinary differential equations to linear form. Not much work was done in this direction to start with, but recently there have been various developments. Here, first the original work of Lie (and the early developments on it, and then more recent developments based on geometry and complex analysis, apart from Lie’s own method of algebra (namely, Lie group theory, are reviewed. It is relevant to mention that much of the work is not linearization but uses the base of linearization.

  6. Window observers for linear systems

    Utkin Vadim

    2000-01-01

    Full Text Available Given a linear system x ˙ = A x + B u with output y = C x and a window function ω ( t , i.e., ∀ t , ω ( t ∈ {0,1 }, and assuming that the window function is Lebesgue measurable, we refer to the following observer, x ˆ = A x + B u + ω ( t L C ( x − x ˆ as a window observer. The stability issue is treated in this paper. It is proven that for linear time-invariant systems, the window observer can be stabilized by an appropriate design under a very mild condition on the window functions, albeit for linear time-varying system, some regularity of the window functions is required to achieve observer designs with the asymptotic stability. The corresponding design methods are developed. An example is included to illustrate the possible applications

  7. Topics in quaternion linear algebra

    Rodman, Leiba

    2014-01-01

    Quaternions are a number system that has become increasingly useful for representing the rotations of objects in three-dimensional space and has important applications in theoretical and applied mathematics, physics, computer science, and engineering. This is the first book to provide a systematic, accessible, and self-contained exposition of quaternion linear algebra. It features previously unpublished research results with complete proofs and many open problems at various levels, as well as more than 200 exercises to facilitate use by students and instructors. Applications presented in the book include numerical ranges, invariant semidefinite subspaces, differential equations with symmetries, and matrix equations. Designed for researchers and students across a variety of disciplines, the book can be read by anyone with a background in linear algebra, rudimentary complex analysis, and some multivariable calculus. Instructors will find it useful as a complementary text for undergraduate linear algebra courses...

  8. Towards the International Linear Collider

    Lopez-Fernandez, Ricardo

    2006-01-01

    The broad physics potential of e+e- linear colliders was recognized by the high energy physics community right after the end of LEP in 2000. In 2007, the Large Hadron Collider (LHC) now under construction at CERN will obtain its first collisions. The LHC, colliding protons with protons at 14 TeV, will discover a standard model Higgs boson over the full potential mass range, and should be sensitive to new physics into the several TeV range. The program for the Linear Collider (LC) will be set in the context of the discoveries made at the LHC. All the proposals for a Linear Collider will extend the discoveries and provide a wealth of measurements that are essential for giving deeper understanding of their meaning, and pointing the way to further evolution of particle physics in the future. For the mexican groups is the right time to join such an effort

  9. Linear Synchronous Motor Repeatability Tests

    Ward, C.R.

    2002-01-01

    A cart system using linear synchronous motors was being considered for the Plutonium Immobilization Plant (PIP). One of the applications in the PIP was the movement of a stack of furnace trays, filled with the waste form (pucks) from a stacking/unstacking station to several bottom loaded furnaces. A system was ordered to perform this function in the PIP Ceramic Prototype Test Facility (CPTF). This system was installed and started up in SRTC prior to being installed in the CPTF. The PIP was suspended and then canceled after the linear synchronous motor system was started up. This system was used to determine repeatability of a linear synchronous motor cart system for the Modern Pit Facility

  10. Linearly polarized photons at ELSA

    Eberhardt, Holger [Physikalisches Institut, Universitaet Bonn (Germany)

    2009-07-01

    To investigate the nucleon resonance regime in meson photoproduction, double polarization experiments are currently performed at the electron accelerator ELSA in Bonn. The experiments make use of a polarized target and circularly or linearly polarized photon beams. Linearly polarized photons are produced by coherent bremsstrahlung from an accurately aligned diamond crystal. The orientation of the crystal with respect to the electron beam is measured using the Stonehenge-Technique. Both, the energy of maximum polarization and the plane of polarization, can be deliberately chosen for the experiment. The linearly polarized beam provides the basis for the measurement of azimuthal beam asymmetries, such as {sigma} (unpolarized target) and G (polarized target). These observables are extracted in various single and multiple meson photoproduction channels.

  11. Linear programming foundations and extensions

    Vanderbei, Robert J

    2001-01-01

    Linear Programming: Foundations and Extensions is an introduction to the field of optimization. The book emphasizes constrained optimization, beginning with a substantial treatment of linear programming, and proceeding to convex analysis, network flows, integer programming, quadratic programming, and convex optimization. The book is carefully written. Specific examples and concrete algorithms precede more abstract topics. Topics are clearly developed with a large number of numerical examples worked out in detail. Moreover, Linear Programming: Foundations and Extensions underscores the purpose of optimization: to solve practical problems on a computer. Accordingly, the book is coordinated with free efficient C programs that implement the major algorithms studied: -The two-phase simplex method; -The primal-dual simplex method; -The path-following interior-point method; -The homogeneous self-dual methods. In addition, there are online JAVA applets that illustrate various pivot rules and variants of the simplex m...

  12. Uniqueness theorems in linear elasticity

    Knops, Robin John

    1971-01-01

    The classical result for uniqueness in elasticity theory is due to Kirchhoff. It states that the standard mixed boundary value problem for a homogeneous isotropic linear elastic material in equilibrium and occupying a bounded three-dimensional region of space possesses at most one solution in the classical sense, provided the Lame and shear moduli, A and J1 respectively, obey the inequalities (3 A + 2 J1) > 0 and J1>O. In linear elastodynamics the analogous result, due to Neumann, is that the initial-mixed boundary value problem possesses at most one solution provided the elastic moduli satisfy the same set of inequalities as in Kirchhoffs theorem. Most standard textbooks on the linear theory of elasticity mention only these two classical criteria for uniqueness and neglect altogether the abundant literature which has appeared since the original publications of Kirchhoff. To remedy this deficiency it seems appropriate to attempt a coherent description ofthe various contributions made to the study of uniquenes...

  13. Bayes linear statistics, theory & methods

    Goldstein, Michael

    2007-01-01

    Bayesian methods combine information available from data with any prior information available from expert knowledge. The Bayes linear approach follows this path, offering a quantitative structure for expressing beliefs, and systematic methods for adjusting these beliefs, given observational data. The methodology differs from the full Bayesian methodology in that it establishes simpler approaches to belief specification and analysis based around expectation judgements. Bayes Linear Statistics presents an authoritative account of this approach, explaining the foundations, theory, methodology, and practicalities of this important field. The text provides a thorough coverage of Bayes linear analysis, from the development of the basic language to the collection of algebraic results needed for efficient implementation, with detailed practical examples. The book covers:The importance of partial prior specifications for complex problems where it is difficult to supply a meaningful full prior probability specification...

  14. Scalar-tensor linear inflation

    Artymowski, Michał [Institute of Physics, Jagiellonian University, Łojasiewicza 11, 30-348 Kraków (Poland); Racioppi, Antonio, E-mail: Michal.Artymowski@uj.edu.pl, E-mail: Antonio.Racioppi@kbfi.ee [National Institute of Chemical Physics and Biophysics, Rävala 10, 10143 Tallinn (Estonia)

    2017-04-01

    We investigate two approaches to non-minimally coupled gravity theories which present linear inflation as attractor solution: a) the scalar-tensor theory approach, where we look for a scalar-tensor theory that would restore results of linear inflation in the strong coupling limit for a non-minimal coupling to gravity of the form of f (φ) R /2; b) the particle physics approach, where we motivate the form of the Jordan frame potential by loop corrections to the inflaton field. In both cases the Jordan frame potentials are modifications of the induced gravity inflationary scenario, but instead of the Starobinsky attractor they lead to linear inflation in the strong coupling limit.

  15. El sistema inmunológico de las mucosas

    Miriam Zaldívar Ochoa

    2002-10-01

    Full Text Available El sistema inmunológico es muy importante porque protege al organismo de agentes microbianos patógenos, toxinas, partículas extrañas, células tumorales y procesos autoinmunes. Para mantener el equilibrio biológico se necesita que este sistema funcione normalmente, de manera que constituya una fuerte barrera defensiva contra la invasión de agentes nocivos; de no suceder esto, se presentará una inmunodeficiencia de expresión clínica variable. La esencia de la función del sistema inmune es su gran capacidad para la discriminación a escala molecular entre lo propio y lo ajeno, o sea, lo que pertenece al organismo y lo que no, conservando así su individualidad.The immunological system is very important because it protects the organism from pathogenic microbial agents, toxins, foreign particles, tumoral cells and autoimmune processes. To maintain the biological balance, this system should work normally, acting as a strong defensive barrier against the invasion of harmful agents. Otherwise, there will be an immunodeficiency of variable clinical expression. The essence of the function of the immune system is its great capacity for distinguishing its own from the strange at the molecular level, that is, to recognize a difference between what belongs or not to the organism, keeping this way its individuality.

  16. Radioisotope measurement system; Sistema de medicion de radioisotopos

    Villanueva Ruibal, Jose [Comision Nacional de Energia Atomica, Ezeiza (Argentina).Centro Atomico Ezeiza

    2007-07-01

    A radioisotope measurement system installed at L.M.R. (Ezeiza Atomic Center of CNEA) allows the measurement of nuclear activity from a wide range of radioisotopes. It permits to characterize a broad range of radioisotopes at several activity levels. The measurement hardware as well as the driving software have been developed and constructed at the Dept. of Instrumentation and Control. The work outlines the system's conformation and its operating concept, describes design characteristics, construction and the error treatment, comments assay results and supplies use advices. Measuring tests carried out employing different radionuclides confirmed the system performing satisfactorily and with friendly operation. (author) [Spanish] Un sistema de instrumentacion instalado en el L.M.R. (Centro Atomico Ezeiza de la CNEA) mide en amplio rango la actividad del decaimiento nuclear de radioisotopos. Permite caracterizar una amplia gama de radioistopos de variados niveles de actividad. Tanto el hardware de medicion como el software de operacion han sido desarrollados y construidos en el Dept. Instrumentacion y Control. El trabajo esboza la conformacion del sistema y su concepto de operacion, describe caracteristicas de disenio, construccion y del tratamiento del error, comenta resultados de ensayos y provee recomendaciones de uso. Pruebas de medicion realizadas empleando diversos nucleidos comprobaron que el sistema funciona en forma satisfactoria y su operacion es amigable. (autor)

  17. Permafrost Hazards and Linear Infrastructure

    Stanilovskaya, Julia; Sergeev, Dmitry

    2014-05-01

    The international experience of linear infrastructure planning, construction and exploitation in permafrost zone is being directly tied to the permafrost hazard assessment. That procedure should also consider the factors of climate impact and infrastructure protection. The current global climate change hotspots are currently polar and mountain areas. Temperature rise, precipitation and land ice conditions change, early springs occur more often. The big linear infrastructure objects cross the territories with different permafrost conditions which are sensitive to the changes in air temperature, hydrology, and snow accumulation which are connected to climatic dynamics. One of the most extensive linear structures built on permafrost worldwide are Trans Alaskan Pipeline (USA), Alaska Highway (Canada), Qinghai-Xizang Railway (China) and Eastern Siberia - Pacific Ocean Oil Pipeline (Russia). Those are currently being influenced by the regional climate change and permafrost impact which may act differently from place to place. Thermokarst is deemed to be the most dangerous process for linear engineering structures. Its formation and development depend on the linear structure type: road or pipeline, elevated or buried one. Zonal climate and geocryological conditions are also of the determining importance here. All the projects are of the different age and some of them were implemented under different climatic conditions. The effects of permafrost thawing have been recorded every year since then. The exploration and transportation companies from different countries maintain the linear infrastructure from permafrost degradation in different ways. The highways in Alaska are in a good condition due to governmental expenses on annual reconstructions. The Chara-China Railroad in Russia is under non-standard condition due to intensive permafrost response. Standards for engineering and construction should be reviewed and updated to account for permafrost hazards caused by the

  18. A Linear Electromagnetic Piston Pump

    Hogan, Paul H.

    Advancements in mobile hydraulics for human-scale applications have increased demand for a compact hydraulic power supply. Conventional designs couple a rotating electric motor to a hydraulic pump, which increases the package volume and requires several energy conversions. This thesis investigates the use of a free piston as the moving element in a linear motor to eliminate multiple energy conversions and decrease the overall package volume. A coupled model used a quasi-static magnetic equivalent circuit to calculate the motor inductance and the electromagnetic force acting on the piston. The force was an input to a time domain model to evaluate the mechanical and pressure dynamics. The magnetic circuit model was validated with finite element analysis and an experimental prototype linear motor. The coupled model was optimized using a multi-objective genetic algorithm to explore the parameter space and maximize power density and efficiency. An experimental prototype linear pump coupled pistons to an off-the-shelf linear motor to validate the mechanical and pressure dynamics models. The magnetic circuit force calculation agreed within 3% of finite element analysis, and within 8% of experimental data from the unoptimized prototype linear motor. The optimized motor geometry also had good agreement with FEA; at zero piston displacement, the magnetic circuit calculates optimized motor force within 10% of FEA in less than 1/1000 the computational time. This makes it well suited to genetic optimization algorithms. The mechanical model agrees very well with the experimental piston pump position data when tuned for additional unmodeled mechanical friction. Optimized results suggest that an improvement of 400% of the state of the art power density is attainable with as high as 85% net efficiency. This demonstrates that a linear electromagnetic piston pump has potential to serve as a more compact and efficient supply of fluid power for the human scale.

  19. Sparse Linear Identifiable Multivariate Modeling

    Henao, Ricardo; Winther, Ole

    2011-01-01

    and bench-marked on artificial and real biological data sets. SLIM is closest in spirit to LiNGAM (Shimizu et al., 2006), but differs substantially in inference, Bayesian network structure learning and model comparison. Experimentally, SLIM performs equally well or better than LiNGAM with comparable......In this paper we consider sparse and identifiable linear latent variable (factor) and linear Bayesian network models for parsimonious analysis of multivariate data. We propose a computationally efficient method for joint parameter and model inference, and model comparison. It consists of a fully...

  20. Quantized, piecewise linear filter network

    Sørensen, John Aasted

    1993-01-01

    A quantization based piecewise linear filter network is defined. A method for the training of this network based on local approximation in the input space is devised. The training is carried out by repeatedly alternating between vector quantization of the training set into quantization classes...... and equalization of the quantization classes linear filter mean square training errors. The equalization of the mean square training errors is carried out by adapting the boundaries between neighbor quantization classes such that the differences in mean square training errors are reduced...

  1. Correct Linearization of Einstein's Equations

    Rabounski D.

    2006-06-01

    Full Text Available Regularly Einstein's equations can be reduced to a wave form (linearly dependent from the second derivatives of the space metric in the absence of gravitation, the space rotation and Christoffel's symbols. As shown here, the origin of the problem is that one uses the general covariant theory of measurement. Here the wave form of Einstein's equations is obtained in the terms of Zelmanov's chronometric invariants (physically observable projections on the observer's time line and spatial section. The obtained equations depend on solely the second derivatives even if gravitation, the space rotation and Christoffel's symbols. The correct linearization proves: the Einstein equations are completely compatible with weak waves of the metric.

  2. Basic linear partial differential equations

    Treves, Francois

    1975-01-01

    Focusing on the archetypes of linear partial differential equations, this text for upper-level undergraduates and graduate students features most of the basic classical results. The methods, however, are decidedly nontraditional: in practically every instance, they tend toward a high level of abstraction. This approach recalls classical material to contemporary analysts in a language they can understand, as well as exploiting the field's wealth of examples as an introduction to modern theories.The four-part treatment covers the basic examples of linear partial differential equations and their

  3. Introduction to computational linear algebra

    Nassif, Nabil; Erhel, Jocelyne

    2015-01-01

    Introduction to Computational Linear Algebra introduces the reader with a background in basic mathematics and computer programming to the fundamentals of dense and sparse matrix computations with illustrating examples. The textbook is a synthesis of conceptual and practical topics in ""Matrix Computations."" The book's learning outcomes are twofold: to understand state-of-the-art computational tools to solve matrix computations problems (BLAS primitives, MATLAB® programming) as well as essential mathematical concepts needed to master the topics of numerical linear algebra. It is suitable for s

  4. Linear feedback controls the essentials

    Haidekker, Mark A

    2013-01-01

    The design of control systems is at the very core of engineering. Feedback controls are ubiquitous, ranging from simple room thermostats to airplane engine control. Helping to make sense of this wide-ranging field, this book provides a new approach by keeping a tight focus on the essentials with a limited, yet consistent set of examples. Analysis and design methods are explained in terms of theory and practice. The book covers classical, linear feedback controls, and linear approximations are used when needed. In parallel, the book covers time-discrete (digital) control systems and juxtapos

  5. Passive longitudinal phase space linearizer

    P. Craievich

    2010-03-01

    Full Text Available We report on the possibility to passively linearize the bunch compression process in electron linacs for the next generation x-ray free electron lasers. This can be done by using the monopole wakefields in a dielectric-lined waveguide. The optimum longitudinal voltage loss over the length of the bunch is calculated in order to compensate both the second-order rf time curvature and the second-order momentum compaction terms. Thus, the longitudinal phase space after the compression process is linearized up to a fourth-order term introduced by the convolution between the bunch and the monopole wake function.

  6. Generalized, Linear, and Mixed Models

    McCulloch, Charles E; Neuhaus, John M

    2011-01-01

    An accessible and self-contained introduction to statistical models-now in a modernized new editionGeneralized, Linear, and Mixed Models, Second Edition provides an up-to-date treatment of the essential techniques for developing and applying a wide variety of statistical models. The book presents thorough and unified coverage of the theory behind generalized, linear, and mixed models and highlights their similarities and differences in various construction, application, and computational aspects.A clear introduction to the basic ideas of fixed effects models, random effects models, and mixed m

  7. Emittance control in linear colliders

    Ruth, R.D.

    1991-01-01

    Before completing a realistic design of a next-generation linear collider, the authors must first learn the lessons taught by the first generation, the SLC. Given that, they must make designs fault tolerant by including correction and compensation in the basic design. They must also try to eliminate these faults by improved alignment and stability of components. When these two efforts cross, they have a realistic design. The techniques of generation and control of emittance reviewed here provide a foundation for a design which can obtain the necessary luminosity in a next-generation linear collider

  8. Linear contextual modal type theory

    Schack-Nielsen, Anders; Schürmann, Carsten

    Abstract. When one implements a logical framework based on linear type theory, for example the Celf system [?], one is immediately con- fronted with questions about their equational theory and how to deal with logic variables. In this paper, we propose linear contextual modal type theory that gives...... a mathematical account of the nature of logic variables. Our type theory is conservative over intuitionistic contextual modal type theory proposed by Nanevski, Pfenning, and Pientka. Our main contributions include a mechanically checked proof of soundness and a working implementation....

  9. SISTEMA DE ASEGURAMIENTO DE LA CALIDAD MEDIANTE LA APLICACIÓN DEL SISTEMA HACCP EN LA INDUSTRIA DE PASTAS ALIMENTICIAS

    Aleida González González

    2005-09-01

    Full Text Available

    En este trabajo se presenta un estudio del HACCP (Hazard Analysis Critical Control Points como un sistema de aseguramiento de la calidad en lo referente a la inocuidad para la industria de alimentos, mencionando las técnicas generalmente usadas para llevar a acabo este estudio y mostrando un ejemplo mediante su aplicación en la industria de pastas alimenticias. Como resultado se elaboró la tabla de control HACCP, la misma que recopila los PCC, el peligro posible, los límites críticos, las medidas correctivas, sistema de monitoreo y responsables de las acciones tomadas.

  10. El sistema fiduciario en el Perú: propuesta para la adopción de un sistema fiduciario mixto

    Vivanco Luyo, Fernando Jesús

    2017-01-01

    El fideicomiso es una antigua institución jurídica cuyo nacimiento se atribuye al derecho romano, con una gran influencia del trust anglosajón. Para el Perú resulta ser una institución con poco más de 23 años de aplicación desde su incorporación a nuestra legislación, allá por el año 1993. Actualmente contamos con los “fideicomisos bancarios”, denominados así por encontrarse regulados en la Ley General del Sistema Financiero, del Sistema de Seguros y Orgánica de la Superintende...

  11. HD 208905: um sistema múltiplo de estrelas quentes

    Candeias, J. P.; Daflon, S.; Cunha, K.

    2003-08-01

    Durante o survey de associações OB do disco Galáctico, foi constatada a multiplicidade do sistema HD 208905, pertencentes à associação de Cep OB2. Este objeto está classificado como uma estrela pertencente a um sistema múltiplo, com magnitude mv = 7.0 e tipo espectral B1V. De fato, os espectros de HD 208905 apresentam perfis de absorção triplicados. Dois dos perfis são bastante similares entre si, e são estreitos e bem definidos, sugerindo que as velocidades rotacionais projetadas (v sin i) das duas estrelas são baixas. Os espectros obtidos também apresentam perfis mais alargados que poderiam ser atribuídos a uma terceira componente estelar com v sin i mais alto. A análise de HD 208905 é baseada no estudo da variação da posição relativa dos perfis espectrais de acordo com a fase do sistema. Nossos dados observacionais são um conjunto de espectros de alta resolução obtidos no McDonald Observatory (Universidade do Texas, Austin), Kitt Peak National Observatory e Palomar Observatory, cobrindo o período de 10/91 até 12/95. Inicialmente, calculamos a velocidade radial de cada componente do sistema, considerando o desvio Doppler sofrido por cada estrela. As velocidades radiais medidas foram, em seguida, corrigidas para velocidades radiais heliocêntricas. O passo seguinte constituiu na determinação da periodicidade da série temporal definida pelas medidas das velocidades radiais heliocêntricas através da análise de Fourier. A nossa base de dados não permitiu definir uma solução única para o sistema HD 208905. As possíveis soluções encontradas têm períodos entre 1 e 27 dias e serão apresentadas e discutidas.

  12. Interacciones radiculares en sistemas agroforestales: mecanismos y opciones de manejo

    F. Casanova

    2007-01-01

    Full Text Available Los sistemas agroforestales (SAF son una forma de uso de la tierra en donde las leñosas interactúan con los cultivos y/o animales, con la finalidad de diversificar y optimizar la producción de manera sostenida. Sin embargo, estos sistemas tienen limitantes originados por una combinación inadecuada de las diferentes especies, lo que resulta en competencia entre ellas. Las características radiculares de las especies leñosas tienen un papel importante en el éxito de los SAF, ya que indican modificaciones que pudieran existir entre especies asociadas. Por tanto, el objetivo de esta revisión es analizar la importancia de las interacciones radiculares, los criterios para el manejo con base en las características morfológicas y patrones de crecimiento entre especies y su impacto en los SAF. La incorporación de especies arbóreas dentro de los cultivos requiere de objetivos claros; es decir, conocer el papel que desempeñarían dentro del sistema. No es redituable utilizar especies arbóreas que no poseen cierto valor o producto, ya que la competencia entre los árboles y los cultivos es solamente admisible si es compensada a través de porlas ventajas con relación a los aumentos en la productividad de sistema. Son deseables aquellas especies arbóreas cuyas raíces sean agresivas con relación a los sistemas radiculares del cultivo asociado, y que manifiesten un crecimiento lateral profundo y/o posean una alta plasticidad. Una opción para reducir la competencia radicular es la regulación del espaciamiento y/o distribución de las diversas especies asociadas, así como la aplicación de prácticas de manejo. Los patrones de la actividad radicular de las plantas difieren entre especies, su conocimiento puede ayudar a evitar competencia excesiva y pérdidas de nutrientes en SAF con la asignación óptima del espacio y recursos disponibles.

  13. La evolución de sistemas complejos: el caso del sistema inmune en animales

    Luis Fernando Cadavid Gutierrez

    2009-10-01

    Full Text Available Resumen   El sistema inmune en animales comprende una serie de mecanismos celulares y moleculares que de manera conjunta mantienen la integridad fisiológica y genética de los organismos. Convencionalmente se ha considerado la existencia de dos clases de inmunidad, la innata y la adaptativa. La primera es ancestral, con variabilidad limitada y baja discriminación, mientras que la segunda es altamente variable, específica y restringida a vertebrados mandibulados. La inmunidad adaptativa se basa en receptores de antígeno que se rearreglan somáticamente para generar una diversidad casi ilimitada de moléculas. Este mecanismo de recombinación somática muy probablemente emergió como consecuencia de un evento de transferencia horizontal de transposones y transposas bacterianas en el ancestro de los vertebrados mandibulados. El reciente descubrimiento en vertebrados no mandibulados e invertebrados de mecanismos de inmunidad adaptativa alternos, plantea la necesidad de considerar nuevos elementos en la construcción de un modelo evolutivo de la inmunidad en animales. Algunos de esos elementos se esbozan en este ensayo.   Abstract   The immune system in animals is composed by a series of cell and molecular mechanisms that coordinately maintain the physiological and genetic integrity of the organism. Traditionally, two classes of immunity have been considered, the innate immunity and the adaptive immunity. The former is ancestral, with limited variability and low discrimination. The latter is highly variable, specific and limited to jawed vertebrates. Adaptive immunity is based on antigen receptors that rearrange somatically to generate a nearly unlimited diversity of molecules. Likely, this mechanism of somatic recombination arose as a consequence of a horizontal transfer of transposons and transposases from bacterial genomes in the ancestor of jawed vertebrates. The recent discovery in jawless vertebrates and invertebrates of alternative

  14. Componentes Principales (C.P. de los sistemas de calculo del IPC base 92 y sistema IPC base 2001

    Julio Pallas González

    2002-01-01

    Full Text Available Nueve años después de que se adoptara un cambio de base en el cálculo del IPC para el Estado Español, asistimos a un cambio de sistema en el cálculo del mismo, naciendo el sistema de índices de precios, base 2001. A lo largo de este trabajo y utilizando el programa estadístico SPSS, se tratará de realizar un análisis multivariante, sobre las distintas variables que componen el IPC base 92, del estado español, y las del índice, atendiendo al nuevo sistema base 2001, que entró en vigor en enero de 2002. De todas las técnicas multivariantes susceptibles de ser aplicadas en este trabajo, se utilizaran el análisis de componentes principales y el análisis factorial, con el fin de obtener factores no observables que permitan explicar, perdiendo la mínima información, las variables originales que representan.

  15. Vanilla Technicolor at Linear Colliders

    T. Frandsen, Mads; Jarvinen, Matti; Sannino, Francesco

    2011-01-01

    We analyze the reach of Linear Colliders (LC)s for models of dynamical electroweak symmetry breaking. We show that LCs can efficiently test the compositeness scale, identified with the mass of the new spin-one resonances, till the maximum energy in the center-of-mass of the colliding leptons. In ...

  16. Variational linear algebraic equations method

    Moiseiwitsch, B.L.

    1982-01-01

    A modification of the linear algebraic equations method is described which ensures a variational bound on the phaseshifts for potentials having a definite sign at all points. The method is illustrated by the elastic scattering of s-wave electrons by the static field of atomic hydrogen. (author)

  17. Feedback Systems for Linear Colliders

    1999-01-01

    Feedback systems are essential for stable operation of a linear collider, providing a cost-effective method for relaxing tight tolerances. In the Stanford Linear Collider (SLC), feedback controls beam parameters such as trajectory, energy, and intensity throughout the accelerator. A novel dithering optimization system which adjusts final focus parameters to maximize luminosity contributed to achieving record performance in the 1997-98 run. Performance limitations of the steering feedback have been investigated, and improvements have been made. For the Next Linear Collider (NLC), extensive feedback systems are planned as an integral part of the design. Feedback requirements for JLC (the Japanese Linear Collider) are essentially identical to NLC; some of the TESLA requirements are similar but there are significant differences. For NLC, algorithms which incorporate improvements upon the SLC implementation are being prototyped. Specialized systems for the damping rings, rf and interaction point will operate at high bandwidth and fast response. To correct for the motion of individual bunches within a train, both feedforward and feedback systems are planned. SLC experience has shown that feedback systems are an invaluable operational tool for decoupling systems, allowing precision tuning, and providing pulse-to-pulse diagnostics. Feedback systems for the NLC will incorporate the key SLC features and the benefits of advancing technologies

  18. Aspects of robust linear regression

    Davies, P.L.

    1993-01-01

    Section 1 of the paper contains a general discussion of robustness. In Section 2 the influence function of the Hampel-Rousseeuw least median of squares estimator is derived. Linearly invariant weak metrics are constructed in Section 3. It is shown in Section 4 that $S$-estimators satisfy an exact

  19. Periodic linear differential stochastic processes

    Kwakernaak, H.

    1975-01-01

    Periodic linear differential processes are defined and their properties are analyzed. Equivalent representations are discussed, and the solutions of related optimal estimation problems are given. An extension is presented of Kailath and Geesey’s [1] results concerning the innovations representation

  20. Linear colliders for photon collisions

    Anon.

    1994-01-01

    The enthusiasm of the first international workshop on photonphoton colliders and associated physics, held at the Lawrence Berkeley Laboratory from 28 March - 1 April, could have set a ball rolling. According to proponents of this physics, the particle physics one can study with a high energy linear collider is special and complements that of a hadron supercollider

  1. Saturation and linear transport equation

    Kutak, K.

    2009-03-01

    We show that the GBW saturation model provides an exact solution to the one dimensional linear transport equation. We also show that it is motivated by the BK equation considered in the saturated regime when the diffusion and the splitting term in the diffusive approximation are balanced by the nonlinear term. (orig.)

  2. Parameterized Linear Longitudinal Airship Model

    Kulczycki, Eric; Elfes, Alberto; Bayard, David; Quadrelli, Marco; Johnson, Joseph

    2010-01-01

    A parameterized linear mathematical model of the longitudinal dynamics of an airship is undergoing development. This model is intended to be used in designing control systems for future airships that would operate in the atmospheres of Earth and remote planets. Heretofore, the development of linearized models of the longitudinal dynamics of airships has been costly in that it has been necessary to perform extensive flight testing and to use system-identification techniques to construct models that fit the flight-test data. The present model is a generic one that can be relatively easily specialized to approximate the dynamics of specific airships at specific operating points, without need for further system identification, and with significantly less flight testing. The approach taken in the present development is to merge the linearized dynamical equations of an airship with techniques for estimation of aircraft stability derivatives, and to thereby make it possible to construct a linearized dynamical model of the longitudinal dynamics of a specific airship from geometric and aerodynamic data pertaining to that airship. (It is also planned to develop a model of the lateral dynamics by use of the same methods.) All of the aerodynamic data needed to construct the model of a specific airship can be obtained from wind-tunnel testing and computational fluid dynamics

  3. Linear Methods for Image Interpolation

    Pascal Getreuer

    2011-09-01

    Full Text Available We discuss linear methods for interpolation, including nearest neighbor, bilinear, bicubic, splines, and sinc interpolation. We focus on separable interpolation, so most of what is said applies to one-dimensional interpolation as well as N-dimensional separable interpolation.

  4. Directivity of basic linear arrays

    Bach, Henning

    1970-01-01

    For a linear uniform array ofnelements, an expression is derived for the directivity as a function of the spacing and the phase constants. The cases of isotropic elements, collinear short dipoles, and parallel short dipoles are included. The formula obtained is discussed in some detail and contour...

  5. Data Compression with Linear Algebra

    Etler, David

    2015-01-01

    A presentation on the applications of linear algebra to image compression. Covers entropy, the discrete cosine transform, thresholding, quantization, and examples of images compressed with DCT. Given in Spring 2015 at Ocean County College as part of the honors program.

  6. 175 Years of Linear Programming

    polynomial-time solvability of linear programming, that is, testing if a polyhedron Q E ~ ... Q is rational, i.e. all extreme points and rays of Q are ra- tional vectors or ..... rithrll terminates with an interior solution, a post-processing step is usually ...

  7. 175 Years of Linear Programming

    Home; Journals; Resonance – Journal of Science Education; Volume 4; Issue 10. 175 Years of Linear Programming - Max Flow = Min Cut. Vijay Chandru M R Rao. Series Article Volume 4 Issue 10 October 1999 pp 22-39. Fulltext. Click here to view fulltext PDF. Permanent link:

  8. Linear collider systems and costs

    Loew, G.A.

    1993-05-01

    The purpose of this paper is to examine some of the systems and sub-systems involved in so-called ''conventional'' e + e - linear colliders and to study how their design affects the overall cost of these machines. There are presently a total of at least six 500 GeV c. of m. linear collider projects under study in the world. Aside from TESLA (superconducting linac at 1.3 GHz) and CLIC (two-beam accelerator with main linac at 30GHz), the other four proposed e + e - linear colliders can be considered ''conventional'' in that their main linacs use the proven technique of driving room temperature accelerator sections with pulsed klystrons and modulators. The centrally distinguishing feature between these projects is their main linac rf frequency: 3 GHz for the DESY machine, 11.424 GHz for the SLAC and JLC machines, and 14 GHz for the VLEPP machine. The other systems, namely the electron and positron sources, preaccelerators, compressors, damping rings and final foci, are fairly similar from project to project. Probably more than 80% of the cost of these linear colliders will be incurred in the two main linacs facing each other and it is therefore in their design and construction that major savings or extra costs may be found

  9. Linear accelerators of the future

    Loew, G.A.

    1986-07-01

    Some of the requirements imposed on future linear accelerators to be used in electron-positron colliders are reviewed, as well as some approaches presently being examined for meeting those requirements. RF sources for use in these linacs are described, as well as wakefields, single bunches, and multiple-bunch trains

  10. 175 Years of Linear Programming

    Home; Journals; Resonance – Journal of Science Education; Volume 4; Issue 5. 175 Years of Linear Programming - Pune's Gift. Vijay Chandru M R Rao. Series Article Volume 4 Issue 5 May ... Computer Science and Automation, IISc Bangalore 560012, India. Director, Indian Institute of Management, Bannerghatta Road, ...

  11. ALMACÉN DE CARBONO EN SISTEMAS AGROFORESTALES CON CAFÉ

    William Espinoza-Domínguez

    2012-01-01

    Full Text Available El presente estudio se realizó con el objetivo de estimar el almacén de carbono en sistemas agroforestales (SAF con base en café en la región de Huatusco, zona de mayor producción de café (Coffea arabiga L. en el estado de Veracruz, México, a fin de obtener información cuantitativa sobre el potencial de mitigación de carbono en los SAF de la región. Para ello, se estimaron los reservorios de carbono en biomasa vegetal y la materia orgánica edáfica existentes en sistemas agroforestales de café-plátano, café-macadamia, café-cedro rosado, café-ganado ovino y café-chalahuite, y como referencia de una condición no agroforestal se incluyeron un bosque primario y un potrero con pradera natural. La recolección de muestras se hizo en parcelas de 4 x 25 m (100 m2, donde se colectó biomasa de vegetación herbácea y mantillo, y para el suelo la profundidad de muestreo fue de 0 a 30 cm. El sistema agroforestal que presentó la mayor cantidad de carbono aéreo, estimado con modelos alelométricos, fue café-cedro rosado (Ca + Ce, con 114 Mg C·ha-1, seguido de los sistemas café - macadamia (Ca + Ma, con 34 Mg C·ha-1; café-chalahuite (Ca + Ch, con 29 Mg C·ha-1; café-plátano velillo (Ca + Pl, con 27 Mg C·ha-1; y por último el sistema silvopastoril (Sp, con 2 Mg C·ha-1. Para el caso del carbono orgánico del suelo, el tratamiento (Ca + Ce fue el que presentó mayor contenido de carbono fácilmente oxidable en el suelo, con 58 Mg C·ha-1, y el menor fue el tratamiento potrero (P, con 50 Mg C·ha-1. Del carbono orgánico total entre los SAF el tratamiento Ca + Ce fue el que tuvo el mayor valor, con 172 Mg C·ha-1, y el tratamiento silvopastoril (Sp presentó el menor, con 65 Mg C·ha-1. De los sistemas evaluados se concluye que, en promedio, los SAF almacenan 102 Mg C·ha-1, mientras que el potrero almacena 52 t C·ha-1, y el bosque primario es el sistema que más almacena carbono total, con un valor de 355 Mg C·ha-1.

  12. Spaces of Piecewise Linear Manifolds

    Gomez Lopez, Mauricio Esteban

    Abstract In this thesis we introduce Δ-set  ψPLd(RN) which we regard as the piecewise linear analogue of the space ψd(RN) of smooth d-dimensional submanifoldsin RN introduced by Galatius in [4]. Using ψPLd(RN) we define a bi-Δ-set Cd(RN)•,• ( whose geometric realization BCPLd(RN) = llCd(RN)•,•ll ......Abstract In this thesis we introduce Δ-set  ψPLd(RN) which we regard as the piecewise linear analogue of the space ψd(RN) of smooth d-dimensional submanifoldsin RN introduced by Galatius in [4]. Using ψPLd(RN) we define a bi-Δ-set Cd(RN)•,• ( whose geometric realization BCPLd(RN) = ll...... BCPLd (RN) ≅ ΩN–1lψPLd (RN)•l when N — d  ≥ 3. The proof of the main theorem relies on properties of ψPLd (RN) • which arise from the fact that this Δ-set can be obtained from a more general contravariant functor PL op → Sets defined on the category of finite dimensional polyhedraand piecewise linear...... maps, and on a fiberwise transversality result for piecewise linear submersions whose fibers are contained in R × (-1,1)N-1 ⊆ RN . For the proof of this transversality result we use a theorem of Hudson on extensions of piecewise linear isotopies which is why we need to include the condition N — d ≥ 3...

  13. Seguridad social y sistemas previsionales en América Latina

    Solano-Brenes, Ana Isable

    2016-01-01

    Este artículo pretende comunicar el resultado de una investigación sobre la Seguridad Social y los sistemas previsiones, desde sus orígenes en la edad media, su transformación en la Revolución Industrial, así como los diversos sistemas que se desarrollan hasta dar paso a los llamados Sistemas Previsionales como uno de los aspectos más importantes de la Seguridad Social.

  14. Criterios de seguridad en tableros de puentes con sistema de atirantamiento extradosado

    Liu, Zhang

    2017-01-01

    Los criterios de seguridad en Estado Límite Último en tableros de hormigón pretensado están claramente establecidos para sistemas de pretensado convencional adherente o no, interior o exterior a la losa del tablero así como para sistemas de atirantamiento convencionales. Sin embargo en la normativa actual no se contempla criterios de seguridad aplicables a sistemas de atirantamiento no convencionales como el extradosado. El trabajo pretende analizar los criterios de segurida...

  15. Linear fixed-field multipass arcs for recirculating linear accelerators

    V. S. Morozov

    2012-06-01

    Full Text Available Recirculating linear accelerators (RLA’s provide a compact and efficient way of accelerating particle beams to medium and high energies by reusing the same linac for multiple passes. In the conventional scheme, after each pass, the different energy beams coming out of the linac are separated and directed into appropriate arcs for recirculation, with each pass requiring a separate fixed-energy arc. In this paper we present a concept of an RLA return arc based on linear combined-function magnets, in which two and potentially more consecutive passes with very different energies are transported through the same string of magnets. By adjusting the dipole and quadrupole components of the constituting linear combined-function magnets, the arc is designed to be achromatic and to have zero initial and final reference orbit offsets for all transported beam energies. We demonstrate the concept by developing a design for a droplet-shaped return arc for a dogbone RLA capable of transporting two beam passes with momenta different by a factor of 2. We present the results of tracking simulations of the two passes and lay out the path to end-to-end design and simulation of a complete dogbone RLA.

  16. Efikasnost sistema PVO u uslovima elektronskih dejstava / Efficiency of antiaircraft system in electronic warfare

    Vladimir V. Šepec

    2007-01-01

    Full Text Available U radu je primenjena teorija masovnog opsluživanja u analizi efikasnosti sistema protivvazduhoplovne odbrane (sistema PVO u uslovima elektronskih dejstava protivnika. Prikazan je model za ocenu efikasnosti sistema PVO i predstavljeni su izrazi za procenu efikasnosti sistema PVO u uslovima elektronskih dejstava. / In this article the theory of mass servicing is used in the analysis of efficiency of antiaircraft system in the conditions of electronic warfare. The model for analysis of the antiaircraft system efficiency has been shown and formulas for qualitative analysis of antiaircraft system efficiency have been presented in the conditions of electronic warfare.

  17. Sistema de iluminación inteligente inalámbrico

    Nicolás Jaro, Jesús

    2014-01-01

    Este proyecto crea un sistema de iluminación inteligente compuesto por múltiples dispositivos que, de forma inalámbrica, se sincronizan entre si, para encenderse, apagarse y cambiar el color de la luz ambiente. El sistema se ha diseñado para conectar hasta 8 dispositivos basados en el sistema embebido LPC1769 y S.O. FreeRTOS, integrando un sensor acelerómetro, varios leds de distinto color y un módulo WiFly RN-XV que los interconecta de forma inalámbrica. Aquest projecte crea un sistema d'...

  18. Implementación de los Servicios Terminal Server en un Sistema Corporativo

    PUCHALT RODRÍGUEZ, ANA ELVIRA; GÓMEZ GARCÍA, PABLO JOSÉ

    2014-01-01

    Este proyecto final de carrera presenta el diseño e implementación de los sistemas de acceso a la red y de los servicios de Terminal Server en un sistema corporativo basado en Windows Server 2008 R2. Dado que no hay posibilidad de realizar el proyecto en un sistema corporativo real, se establecerá un sistema corporativo ficticio, donde cada uno de los trabajadores obtendrá acceso a su propia sesión con sus credenciales identificadoras. En esta sesión, se tendrá acceso a determi...

  19. Sistemas de acceso a la información telemática

    Merlo Vega, José Antonio

    1998-01-01

    Internet ofrece distintos sistemas para acceder a la información. Se exponen los diferentes tipos de documentos que pueden ser localizados en Internet, así como las distintas fuentes de información de Internet. Se ofrece una clasificación de los sistemas de acceso a la información telemática a partir del tratamiento y el análisis que recibe la información, dividiéndose estos sistemas en tratamiento intelectual y automático y sistemas con o sin análisis documental. Se estudian los distintos as...

  20. Modelación de un sistema de reinyección de agua

    Zamora Aizaga, Iván Marcelo; Barahona Borja, Tony Roman

    2012-01-01

    170 hojas : ilustraciones, 29 x 21 cm + CD-ROM 4531 Este trabajo está orientado a realizar una modelación en estado estable de un sistema de reinyección de agua de formación con la finalidad de obtener el punto óptimo de operación entre las curvas del sistema de bombas y la curva del sistema de redes de tuberías. El dimensionamiento de redes de tuberías y la curva del sistema de diferentes tipos de bombas operando serie o paralelo son problemas comunes en la industria petrolera, las cuales...

  1. Sistema de Aprovechamiento de la Energía de las Olas del Mar

    Pi Amorós, Gabriel

    2010-01-01

    Este documento describe un sistema de aprovechamiento de la energía transportada por el oleaje o energía undimotriz. El sistema no transformará la energía únicamente en electricidad si no que aprovecha dicha electricidad para producir hidrógeno mediante el proceso de la electrólisis del agua de mar. Es decir, el sistema propuesto es un sistema de generación de hidrógeno de origen renovable a partir de una fuente de energía renovable, la energía undimotriz. Las característica...

  2. Desarrollo de un sistema de asignación de tareas a trabajadores polivalentes

    Mora Jardón, Alejandro; Moreno Medina, Irene

    2007-01-01

    El proyecto consiste en: analizar las necesidades de gestión de información en la asignación de tareas. Diseño de un sistema de gestión para esta asignación. Desarrollo de una aplicación para aplicar este sistema. Pruebas del sistema sobre diversos ejemplos. Este trabajo de final de carrera consiste en la creación y posterior desarrollo de un sistema de asignación de tareas a trabajadores polivalentes. Esto es, una herramienta que nos organice la distribución laboral a lo largo...

  3. Evaluación de la Corrosión del Cable de Cobre Utilizado en Sistema de Aterrizamiento del ICE - Costa Rica

    Tres, G.; Saborio, E.

    2004-01-01

    En la presente investigación se evaluó principalmente la cinética de corrosión del cable de cobre empleado en las mallas de aterrizamiento de sistemas de pararrayos en plantas del Instituto Costarricense de Electricidad. Se aplicó tanto el método electroquímico de resistencia de polarización linear (LPR; de sus siglaas en inglés) como el gravimétrico. Se realizaron ensayos de laboratorio y de campo, empleando como electrolitos dos productos comercialmente disponibles para el aterrizamiento de...

  4. Multivariate covariance generalized linear models

    Bonat, W. H.; Jørgensen, Bent

    2016-01-01

    are fitted by using an efficient Newton scoring algorithm based on quasi-likelihood and Pearson estimating functions, using only second-moment assumptions. This provides a unified approach to a wide variety of types of response variables and covariance structures, including multivariate extensions......We propose a general framework for non-normal multivariate data analysis called multivariate covariance generalized linear models, designed to handle multivariate response variables, along with a wide range of temporal and spatial correlation structures defined in terms of a covariance link...... function combined with a matrix linear predictor involving known matrices. The method is motivated by three data examples that are not easily handled by existing methods. The first example concerns multivariate count data, the second involves response variables of mixed types, combined with repeated...

  5. Systems of Inhomogeneous Linear Equations

    Scherer, Philipp O. J.

    Many problems in physics and especially computational physics involve systems of linear equations which arise e.g. from linearization of a general nonlinear problem or from discretization of differential equations. If the dimension of the system is not too large standard methods like Gaussian elimination or QR decomposition are sufficient. Systems with a tridiagonal matrix are important for cubic spline interpolation and numerical second derivatives. They can be solved very efficiently with a specialized Gaussian elimination method. Practical applications often involve very large dimensions and require iterative methods. Convergence of Jacobi and Gauss-Seidel methods is slow and can be improved by relaxation or over-relaxation. An alternative for large systems is the method of conjugate gradients.

  6. Linear accelerator for radioisotope production

    Hansborough, L.D.; Hamm, R.W.; Stovall, J.E.

    1982-02-01

    A 200- to 500-μA source of 70- to 90-MeV protons would be a valuable asset to the nuclear medicine program. A linear accelerator (linac) can achieve this performance, and it can be extended to even higher energies and currents. Variable energy and current options are available. A 70-MeV linac is described, based on recent innovations in linear accelerator technology; it would be 27.3 m long and cost approx. $6 million. By operating the radio-frequency (rf) power system at a level necessary to produce a 500-μA beam current, the cost of power deposited in the radioisotope-production target is comparable with existing cyclotrons. If the rf-power system is operated at full power, the same accelerator is capable of producing an 1140-μA beam, and the cost per beam watt on the target is less than half that of comparable cyclotrons

  7. Linear regression in astronomy. II

    Feigelson, Eric D.; Babu, Gutti J.

    1992-01-01

    A wide variety of least-squares linear regression procedures used in observational astronomy, particularly investigations of the cosmic distance scale, are presented and discussed. The classes of linear models considered are (1) unweighted regression lines, with bootstrap and jackknife resampling; (2) regression solutions when measurement error, in one or both variables, dominates the scatter; (3) methods to apply a calibration line to new data; (4) truncated regression models, which apply to flux-limited data sets; and (5) censored regression models, which apply when nondetections are present. For the calibration problem we develop two new procedures: a formula for the intercept offset between two parallel data sets, which propagates slope errors from one regression to the other; and a generalization of the Working-Hotelling confidence bands to nonstandard least-squares lines. They can provide improved error analysis for Faber-Jackson, Tully-Fisher, and similar cosmic distance scale relations.

  8. Squares of Random Linear Codes

    Cascudo Pueyo, Ignacio; Cramer, Ronald; Mirandola, Diego

    2015-01-01

    a positive answer, for codes of dimension $k$ and length roughly $\\frac{1}{2}k^2$ or smaller. Moreover, the convergence speed is exponential if the difference $k(k+1)/2-n$ is at least linear in $k$. The proof uses random coding and combinatorial arguments, together with algebraic tools involving the precise......Given a linear code $C$, one can define the $d$-th power of $C$ as the span of all componentwise products of $d$ elements of $C$. A power of $C$ may quickly fill the whole space. Our purpose is to answer the following question: does the square of a code ``typically'' fill the whole space? We give...

  9. Linear inflation from quartic potential

    Kannike, Kristjan; Racioppi, Antonio [National Institute of Chemical Physics and Biophysics,Rävala 10, 10143 Tallinn (Estonia); Raidal, Martti [National Institute of Chemical Physics and Biophysics,Rävala 10, 10143 Tallinn (Estonia); Institute of Physics, University of Tartu,Tartu (Estonia)

    2016-01-07

    We show that if the inflaton has a non-minimal coupling to gravity and the Planck scale is dynamically generated, the results of Coleman-Weinberg inflation are confined in between two attractor solutions: quadratic inflation, which is ruled out by the recent measurements, and linear inflation which, instead, is in the experimental allowed region. The minimal scenario has only one free parameter — the inflaton’s non-minimal coupling to gravity — that determines all physical parameters such as the tensor-to-scalar ratio and the reheating temperature of the Universe. Should the more precise future measurements of inflationary parameters point towards linear inflation, further interest in scale-invariant scenarios would be motivated.

  10. Computational linear and commutative algebra

    Kreuzer, Martin

    2016-01-01

    This book combines, in a novel and general way, an extensive development of the theory of families of commuting matrices with applications to zero-dimensional commutative rings, primary decompositions and polynomial system solving. It integrates the Linear Algebra of the Third Millennium, developed exclusively here, with classical algorithmic and algebraic techniques. Even the experienced reader will be pleasantly surprised to discover new and unexpected aspects in a variety of subjects including eigenvalues and eigenspaces of linear maps, joint eigenspaces of commuting families of endomorphisms, multiplication maps of zero-dimensional affine algebras, computation of primary decompositions and maximal ideals, and solution of polynomial systems. This book completes a trilogy initiated by the uncharacteristically witty books Computational Commutative Algebra 1 and 2 by the same authors. The material treated here is not available in book form, and much of it is not available at all. The authors continue to prese...

  11. Perspectives on large linear colliders

    Richter, B.

    1987-11-01

    Three main items in the design of large linear colliders are presented. The first is the interrelation of energy and luminosity requirements. These two items impose severe constraints on the accelerator builder who must design a machine to meet the needs of experimentl high energy physics rather than designing a machine for its own sake. An introduction is also given for linear collider design, concentrating on what goes on at the collision point, for still another constraint comes here from the beam-beam interaction which further restricts the choices available to the accelerator builder. The author also gives his impressions of the state of the technology available for building these kinds of machines within the next decade. The paper concludes with a brief recommendation for how we can all get on with the work faster, and hope to realize these machines sooner by working together. 10 refs., 9 figs

  12. Forms and Linear Network Codes

    Hansen, Johan P.

    We present a general theory to obtain linear network codes utilizing forms and obtain explicit families of equidimensional vector spaces, in which any pair of distinct vector spaces intersect in the same small dimension. The theory is inspired by the methods of the author utilizing the osculating...... spaces of Veronese varieties. Linear network coding transmits information in terms of a basis of a vector space and the information is received as a basis of a possibly altered vector space. Ralf Koetter and Frank R. Kschischang introduced a metric on the set af vector spaces and showed that a minimal...... distance decoder for this metric achieves correct decoding if the dimension of the intersection of the transmitted and received vector space is sufficiently large. The vector spaces in our construction are equidistant in the above metric and the distance between any pair of vector spaces is large making...

  13. Perspectives on large Linear Colliders

    Richter, B.

    1987-01-01

    The accelerator community now generally agrees that the Linear Collider is the most cost-effective technology for reaching much higher energies in the center-of-mass than can be attained in the largest of the e + e - storage rings, LEP. Indeed, even as the first linear collider, the SLC at SLAC, is getting ready to begin operations groups, at SLAC, Novosibirsk, CERN and KEK are doing R and D and conceptual design studies on a next generation machine in the 1 TeV energy region. In this perspectives talk I do not want to restrict my comments to any particular design, and so I will talk about a high-energy machine as the NLC, which is shorthand for the Next Linear Collider, and taken to mean a machine with a center-of-mass energy someplace in the 0.5 to 2 TeV energy range with sufficient luminosity to carry out a meaningful experimental program. I want to discuss three main items with you. The first is the interrelation of energy and luminosity requirements. These two items impose severe constraints on the accelerator builder. Next, I will give an introduction to linear collider design, concentrating on what goes on at the collision point, for still another constraint comes here from the beam-beam interaction which further restricts the choices available to the accelerator builder.Then, I want to give my impressions of the state of the technology available for building these kinds of machines within the next decade

  14. Linear gate with prescaled window

    Koch, J; Bissem, H H; Krause, H; Scobel, W [Hamburg Univ. (Germany, F.R.). 1. Inst. fuer Experimentalphysik

    1978-07-15

    An electronic circuit is described that combines the features of a linear gate, a single channel analyzer and a prescaler. It allows selection of a pulse height region between two adjustable thresholds and scales the intensity of the spectrum within this window down by a factor 2sup(N) (0<=N<=9), whereas the complementary part of the spectrum is transmitted without being affected.

  15. Stanford Linear Collider magnet positioning

    Wand, B.T.

    1991-08-01

    For the installation of the Stanford Linear Collider (SLC) the positioning and alignment of the beam line components was performed in several individual steps. In the following the general procedures for each step are outlined. The calculation of ideal coordinates for the magnets in the entire SLC will be discussed in detail. Special emphasis was given to the mathematical algorithms and geometry used in the programs to calculate these ideal positions. 35 refs., 21 figs

  16. Linear positivity and virtual probability

    Hartle, James B.

    2004-01-01

    We investigate the quantum theory of closed systems based on the linear positivity decoherence condition of Goldstein and Page. The objective of any quantum theory of a closed system, most generally the universe, is the prediction of probabilities for the individual members of sets of alternative coarse-grained histories of the system. Quantum interference between members of a set of alternative histories is an obstacle to assigning probabilities that are consistent with the rules of probability theory. A quantum theory of closed systems therefore requires two elements: (1) a condition specifying which sets of histories may be assigned probabilities and (2) a rule for those probabilities. The linear positivity condition of Goldstein and Page is the weakest of the general conditions proposed so far. Its general properties relating to exact probability sum rules, time neutrality, and conservation laws are explored. Its inconsistency with the usual notion of independent subsystems in quantum mechanics is reviewed. Its relation to the stronger condition of medium decoherence necessary for classicality is discussed. The linear positivity of histories in a number of simple model systems is investigated with the aim of exhibiting linearly positive sets of histories that are not decoherent. The utility of extending the notion of probability to include values outside the range of 0-1 is described. Alternatives with such virtual probabilities cannot be measured or recorded, but can be used in the intermediate steps of calculations of real probabilities. Extended probabilities give a simple and general way of formulating quantum theory. The various decoherence conditions are compared in terms of their utility for characterizing classicality and the role they might play in further generalizations of quantum mechanics

  17. Order-constrained linear optimization.

    Tidwell, Joe W; Dougherty, Michael R; Chrabaszcz, Jeffrey S; Thomas, Rick P

    2017-11-01

    Despite the fact that data and theories in the social, behavioural, and health sciences are often represented on an ordinal scale, there has been relatively little emphasis on modelling ordinal properties. The most common analytic framework used in psychological science is the general linear model, whose variants include ANOVA, MANOVA, and ordinary linear regression. While these methods are designed to provide the best fit to the metric properties of the data, they are not designed to maximally model ordinal properties. In this paper, we develop an order-constrained linear least-squares (OCLO) optimization algorithm that maximizes the linear least-squares fit to the data conditional on maximizing the ordinal fit based on Kendall's τ. The algorithm builds on the maximum rank correlation estimator (Han, 1987, Journal of Econometrics, 35, 303) and the general monotone model (Dougherty & Thomas, 2012, Psychological Review, 119, 321). Analyses of simulated data indicate that when modelling data that adhere to the assumptions of ordinary least squares, OCLO shows minimal bias, little increase in variance, and almost no loss in out-of-sample predictive accuracy. In contrast, under conditions in which data include a small number of extreme scores (fat-tailed distributions), OCLO shows less bias and variance, and substantially better out-of-sample predictive accuracy, even when the outliers are removed. We show that the advantages of OCLO over ordinary least squares in predicting new observations hold across a variety of scenarios in which researchers must decide to retain or eliminate extreme scores when fitting data. © 2017 The British Psychological Society.

  18. Segmented rail linear induction motor

    Cowan, Jr., Maynard; Marder, Barry M.

    1996-01-01

    A segmented rail linear induction motor has a segmented rail consisting of a plurality of nonferrous electrically conductive segments aligned along a guideway. The motor further includes a carriage including at least one pair of opposed coils fastened to the carriage for moving the carriage. A power source applies an electric current to the coils to induce currents in the conductive surfaces to repel the coils from adjacent edges of the conductive surfaces.

  19. Linear polarization of BY Draconis

    Koch, R.H.; Pfeiffer, R.J.

    1976-01-01

    Linear polarization measurements are reported in four bandpasses for the flare star BY Dra. The red polarization is intrinsically variable at a confidence level greater than 99 percent. On a time scale of many months, the variability is not phase-locked to either a rotational or a Keplerian ephemeris. The observations of the three other bandpasses are useful principally to indicate a polarization spectrum rising toward shorter wavelengths

  20. Linear morphea with secondary mucinosis

    Khandpur Sujay

    2009-01-01

    Full Text Available Secondary mucin deposition in the skin is a common feature of lupus erythematosus and dermatomyositis. In scleroderma, it occurs uncommonly or in small amount. We describe a 7-year-old boy with progressive, linear, bound-down plaques involving the thighs, lower abdomen and back with no systemic involvement. Histopathology showed features of scleroderma with abundant mucin deposition in the reticular dermis. This report highlights excessive mucin deposition in lesions of morphea.

  1. Cast dielectric composite linear accelerator

    Sanders, David M [Livermore, CA; Sampayan, Stephen [Manteca, CA; Slenes, Kirk [Albuquerque, NM; Stoller, H M [Albuquerque, NM

    2009-11-10

    A linear accelerator having cast dielectric composite layers integrally formed with conductor electrodes in a solventless fabrication process, with the cast dielectric composite preferably having a nanoparticle filler in an organic polymer such as a thermosetting resin. By incorporating this cast dielectric composite the dielectric constant of critical insulating layers of the transmission lines of the accelerator are increased while simultaneously maintaining high dielectric strengths for the accelerator.

  2. Introduction to Microwave Linear [Accelerators

    Whittum, David H

    1999-01-04

    The elements of microwave linear accelerators are introduced starting with the principles of acceleration and accelerating structures. Considerations for microwave structure modeling and design are developed from an elementary point of view. Basic elements of microwave electronics are described for application to the accelerator circuit and instrumentation. Concepts of beam physics are explored together with examples of common beamline instruments. Charged particle optics and lattice diagnostics are introduced. Considerations for fixed-target and colliding-beam experimentation are summarized.

  3. Construindo um modelo de sistema de cuidados Construyendo un modelo de sistema de cuidados Developing an explanatory theoretical model of system of care

    Alacoque Lorenzini Erdmann

    2007-06-01

    Full Text Available OBJETIVO: Construir um modelo teórico explicativo de Sistema de Cuidados. METODO: Estudo exploratório qualitativo apoiado nos pressupostos da Grounded Theory. Participaram do estudo 15 profissionais e os dados foram coletados por entrevista aberta. RESULTADOS: O Modelo teórico foi delimitado a partir do fenômeno Construindo o Sistema Complexo de Cuidados determinado pelas categorias: Convivendo com a dinamicidade do sistema de cuidados e Organizando o sistema de cuidados a partir de múltiplas interações. CONCLUSÃO: O modelo de sistema de cuidados apresentou-se como sistema vital e dinâmico construído a partir de redes interacionais de vários saberes do agir humano expresso pelo trabalho compartilhado, multidisciplinar e em equipe.OBJETIVO: Construir un modelo teórico explicativo de Sistema de Cuidados. MÉTODO: Se trata de un estudio cualitativo exploratorio apoyado en las premisas de la Teoría Fundamentada en los Datos. Participaron del estudio 15 profesionales. Los datos fueron recolectados por medio de una entrevista abierta. RESULTADOS: El modelo teórico se delimitó al fenómeno Construyendo el Sistema Complejo de Cuidados determinado por las categorías: Viviendo junto con la dinamicidad del sistema de cuidados y Organizando el sistema de cuidados a partir de interacciones múltiples. CONCLUSIÓN: El modelo de sistema de cuidados se presenta como un sistema vital y dinámico construido a partir de redes de interacción de conocimientos del actuar humano expresado en el trabajo conjunto, multidisciplinario y en equipo.OBJECTIVE: To develop an explanatory theoretical model of the system of care. METHOD: Grounded theory served as the conceptual framework to conduct this qualitative exploratory study. Unstructured interviews were conducted among 15 care professionals. RESULTS: The theoretical model was delimited from the phenomenon "building complex system of care" as determined by the following categories: "dealing with a

  4. Positive Quasi Linear Operator Formulation

    Berry, L.A.; Jaeger, E.F.

    2005-01-01

    Expressions for the RF quasi-linear operator are biquadratic sums over the Fourier modes (or FLR equivalent) that describe the RF electric field with a kernel that is a function of the two wave vectors, k-vector L and k-vector R , in the sum. As a result of either an implicit or explicit average over field lines or flux surfaces, this kernel only depends on one parallel wave vector, conventionally k R -vector. When k-vector is an independent component of the representation for E, the sums are demonstrably positive. However, except for closed field line systems, k-vector is dependent on the local direction of the equilibrium magnetic field, and, empirically, the absorbed energy and quasi-linear diffusion coefficients are observed to have negative features. We have formally introduced an independent k-vector sum by Fourier transforming the RF electric field (assuming straight field lines) using a field-line-length coordinate. The resulting expression is positive. We have modeled this approach by calculating the quasi linear operator for 'modes' with fixed k-vector. We form these modes by discretizing k-vector and then assigning all of the Fourier components with k-vectorthat fall within a given k-vector bin to that k-vector mode. Results will be shown as a function of the number of bins. Future work will involve implementing the expressions derived from the Fourier transform and evaluating the dependence on field line length

  5. BLAS- BASIC LINEAR ALGEBRA SUBPROGRAMS

    Krogh, F. T.

    1994-01-01

    The Basic Linear Algebra Subprogram (BLAS) library is a collection of FORTRAN callable routines for employing standard techniques in performing the basic operations of numerical linear algebra. The BLAS library was developed to provide a portable and efficient source of basic operations for designers of programs involving linear algebraic computations. The subprograms available in the library cover the operations of dot product, multiplication of a scalar and a vector, vector plus a scalar times a vector, Givens transformation, modified Givens transformation, copy, swap, Euclidean norm, sum of magnitudes, and location of the largest magnitude element. Since these subprograms are to be used in an ANSI FORTRAN context, the cases of single precision, double precision, and complex data are provided for. All of the subprograms have been thoroughly tested and produce consistent results even when transported from machine to machine. BLAS contains Assembler versions and FORTRAN test code for any of the following compilers: Lahey F77L, Microsoft FORTRAN, or IBM Professional FORTRAN. It requires the Microsoft Macro Assembler and a math co-processor. The PC implementation allows individual arrays of over 64K. The BLAS library was developed in 1979. The PC version was made available in 1986 and updated in 1988.

  6. Test accelerator for linear collider

    Takeda, S.; Akai, K.; Akemoto, M.; Araki, S.; Hayano, H.; Hugo, T.; Ishihara, N.; Kawamoto, T.; Kimura, Y.; Kobayashi, H.; Kubo, T.; Kurokawa, S.; Matsumoto, H.; Mizuno, H.; Odagiri, J.; Otake, Y.; Sakai, H.; Shidara, T.; Shintake, T.; Suetake, M.; Takashima, T.; Takata, K.; Takeuchi, Y.; Urakawa, J.; Yamamoto, N.; Yokoya, K.; Yoshida, M.; Yoshioka, M.; Yamaoka, Y.

    1989-01-01

    KEK has proposed to build Test Accelerator Facility (TAF) capable of producing a 2.5 GeV electron beam for the purpose of stimulating R ampersand D for linear collider in TeV region. The TAF consists of a 1.5 GeV S-band linear accelerator, 1.5 GeV damping ring and 1.0 GeV X-band linear accelerator. The TAF project will be carried forward in three phases. Through Phase-I and Phase-II, the S-band and X-band linacs will be constructed, and in Phase-III, the damping ring will be completed. The construction of TAF Phase-I has started, and the 0.2 GeV S-band injector linac has been almost completed. The Phase-I linac is composed of a 240 keV electron gun, subharmonic bunchers, prebunchers and traveling buncher followed by high-gradient accelerating structures. The SLAC 5045 klystrons are driven at 450 kV in order to obtain the rf-power of 100 MW in a 1 μs pulse duration. The rf-power from a pair of klystrons are combined into an accelerating structure. The accelerating gradient up to 100 MeV/m will be obtained in a 0.6 m long structure. 5 refs., 3 figs., 2 tabs

  7. Orthogonal sparse linear discriminant analysis

    Liu, Zhonghua; Liu, Gang; Pu, Jiexin; Wang, Xiaohong; Wang, Haijun

    2018-03-01

    Linear discriminant analysis (LDA) is a linear feature extraction approach, and it has received much attention. On the basis of LDA, researchers have done a lot of research work on it, and many variant versions of LDA were proposed. However, the inherent problem of LDA cannot be solved very well by the variant methods. The major disadvantages of the classical LDA are as follows. First, it is sensitive to outliers and noises. Second, only the global discriminant structure is preserved, while the local discriminant information is ignored. In this paper, we present a new orthogonal sparse linear discriminant analysis (OSLDA) algorithm. The k nearest neighbour graph is first constructed to preserve the locality discriminant information of sample points. Then, L2,1-norm constraint on the projection matrix is used to act as loss function, which can make the proposed method robust to outliers in data points. Extensive experiments have been performed on several standard public image databases, and the experiment results demonstrate the performance of the proposed OSLDA algorithm.

  8. Las organizaciones de enfermería como sistemas complejos

    Caro Castillo Clara Virginia

    2002-10-01

    Full Text Available

    This study takes into account some considerations about the classical logic when building knowledge. It states the logic of complexity, the complex thought and the rational, open and complex systems, as a new paradigm. In the light of the organization concept proposed by Morin, complex adaptative systems are emphasized, as well as other terms such as order, disorder, incidental events and noises. The self-eco-organizer process, takes the human being thinking as starting point and as dynamizer of simple and complex processes in the construction of knowledge about reality. Some research studies such as those of Erdmann, Meirelles and Pradebon show some ways in which one can learn from the organizational reality of nursing, the exercise of complex thinking in uncertainty, in tenous limits, in heterogeneity, diversity and pluralism of phenomena in its aspect, interactions and associations. The inter subjectivity states a new concept of space and of temporality. The care system organization in nursing visualizes several dimensions of "caríng": to care for himself, to care for himself together with the other, to be looked after by the other, to feel and the process of personal care system, the body itself as the nucleus of care, the fact of belonging to the system of multiple caring relations and the care for nature getting integrated to other beings and other social, natural systems, and in thisway strengthen the feeling of ownership, in search of a better survival, vitality, life human quality.

    El presente estudio hace algunas consideraciones sobre la lógica clásica en la construcción del conocimiento. Señala la lógica de la complejidad, el pensamiento complejo y los sistemas racionales, abiertos y complejos como un nuevo paradigma. A la luz de la concepción de organización propuesta por Morin, enfatiza los sistemas adaptativos complejos, el orden, desorden, eventos, incidentes y ruidos. El proceso auto-eco-organizador toma como

  9. El Sistema Bethesda 2001 The 2001 Bethesda System

    Christine Bergeron

    2003-01-01

    Full Text Available The Bethesda system is a system of terminology for reporting the results of cervical cytology. It was developed in 1988, and is now widely used in the United States. This system was updated in April 2001. The most important modifications are the following: a elimination of the category "satisfactory but limited by", b the reintegration of benign modifications in the normal category, c "atypical squamous cells of undetermined significance" is now named "atypical squamous cells" and subdivided into "atypical squamous cells of undetermined significance" and "cannot exclude high grade squamous intraepithelial lesion"; and d endocervical adenocarcinoma in situ which is now a separate entity. Low grade squamous intraepithelial lesions and high grade squamous intraepithelial cells remain unchanged. Recommendations have been proposed concerning automated review and ancillary testing.El Sistema Bethesda es un sistema de terminología para informar los resultados de citología cervical. Se inició en 1988 y en la actualidad se usa en todos los Estados Unidos de América. Este sistema se actualizó en abril de 2001. Las modificaciones más importantes son las siguientes: a eliminación de la categoría "satisfactorio pero limitado por", b se reintegraron las modificaciones benignas en la categoría normal, c la categoría "células escamosas atípicas de significado indeterminado" ahora se denomina "células escamosas atípicas", y se subdivide en "células escamosas atípicas de significado indeterminado" y "no se puede excluir una lesión escamosa de alto grado", y d adenocarcinoma endocervical in situ, que ahora es una entidad separada. Las lesiones escamosas intraepiteliales de bajo y alto grado quedan sin cambios. Se proponen recomendaciones relacionadas con el uso de la revisión automatizada y la utilización de pruebas auxiliares.

  10. Sistema de salud de Ecuador The health system of Ecuador

    Ruth Lucio

    2011-01-01

    Full Text Available En este trabajo se describen las condiciones de salud en Ecuador y, con mayor detalle, las características del sistema ecuatoriano de salud, incluyendo su estructura y cobertura, sus fuentes de financiamiento, los recursos físicos, materiales y humanos de los que dispone, las tareas de rectoría que desarrolla el Ministerio de Salud Pública, la generación de información en salud, las tareas de investigación, y la participación de los ciudadanos en la operación y evaluación del sistema. También se discuten las innovaciones más recientes que se han implantado en el sistema ecuatoriano de salud dentro de las que destaca la incorporación de un capítulo específico sobre salud a la nueva Constitución que reconoce a la protección de la salud como un derecho humano y la construcción de la Red Pública Integral de Salud.This paper describes the health conditions in Ecuador and, in more detail, the characteristics of the Ecuadorian health system, including its structure and coverage, its financial sources, the physical, material and human resources available, and the stewardship activities developed by the Ministry of Public Health. It also describes the structure and content of its health information system, and the participation of citizens in the operation and evaluation of the health system. The paper ends with a discussion of the most recent policy innovations implemented in the Ecuadorian system, including the incorporation of a chapter on health into the new Constitution which recognizes the protection of health as a human right, and the construction of the Comprehensive Public Health Network.

  11. SISTEMA INMUNE Y VACUNACIÓN DE PECES

    GIOVANNY PENAGOS

    2009-01-01

    Full Text Available RESUMEN Los peces poseen un sistema inmune con muchas de las células y sustancias humorales presentes en vertebrados superiores, pero cuentan también con componentes y funciones especiales, como los centros melanomacrófagos y la capacidad fagocítica de los enterocitos por citar solo algunas de ellas, que difieren profundamente con sus similares en otras especies y que aún hoy son pobremente comprendidas. Sumado a esto, el ambiente acuático y más, el ambiente acuático productivo, es de por si complejo de manera que las posibilidades de las interacciones biológicas son enormes y los procesos difícilmente predecibles. La vacunación es tal vez una de las herramientas más importantes para el control de enfermedades bacterianas en peces, no solo por su potencial preventivo y correctivo sino también por sus bondades con el ambiente y con la salud pública que contrastan notoriamente con los tratamientos antibióticos. El éxito de las vacunas en especies piscícolas depende en buena medida del conocimiento adecuado del sistema inmunológico de los peces, de las interacciones hospedero-ambiente-patógeno, así como de las particularidades de los sistemas productivos. Con todo, la vacunación en ambientes acuáticos se enfrenta a un sinnúmero de dificultades que deben ser abordadas antes que con un enfoque unilateral farmacológico, con una aproximación integral en la que se incluye el uso de herramientas epidemiológicas, clínicas, patológicas, microbiológicas, etc. Palabras clave: vacunación, peces, inmunidad de peces, enfermedades infecciosas en peces.

  12. SISTEMAS TUTORES INTELIGENTES COMO APOYO EN EL PROCESO DE APRENDIZAJE

    Edwin Eduardo Millan Rojas

    2015-09-01

    Full Text Available El objetivo principal de este artículo es la identificación de las principales características de los tutores inteligentes, su origen y evolución los cuales pueden ofrecer elementos para la formulación de nuevos proyectos de investigación relacionados con la educación y el uso de los tutores. El método utilizado es el descriptivo y sistémico, los cuales permiten recopilar los datos necesarios, la información presentada ha sido adquirida de bases de datos especializadas como IEEE, Redalyc, ACM y Science Direct, además de artículos de revistas de universidades internacionales y de proyectos de investigación descargados de Google Académico. Los Sistemas Tutores Inteligentes surgieron al combinar técnicas de inteligencia artificial (IA con los métodos clásicos de enseñanza. Estos son sistemas de software que generan un ambiente idóneo para la interacción y satisfacción de las necesidades del estudiante, adaptable a los conocimientos previos y a la capacidad de evolución de cada alumno respecto a un área del conocimiento. El funcionamiento de los STI se basa en la relación entre tres principales módulos (tutor, estudiante y dominio, para presentar al usuario la información de manera estructurada. La investigación llevada a cabo permitió reunir los aspectos más relevantes de los Sistemas Tutores Inteligentes (STI y presentarlos como una herramienta óptima para llevar a cabo un proceso de aprendizaje.

  13. Core seismic behaviour: linear and non-linear models

    Bernard, M.; Van Dorsselaere, M.; Gauvain, M.; Jenapierre-Gantenbein, M.

    1981-08-01

    The usual methodology for the core seismic behaviour analysis leads to a double complementary approach: to define a core model to be included in the reactor-block seismic response analysis, simple enough but representative of basic movements (diagrid or slab), to define a finer core model, with basic data issued from the first model. This paper presents the history of the different models of both kinds. The inert mass model (IMM) yielded a first rough diagrid movement. The direct linear model (DLM), without shocks and with sodium as an added mass, let to two different ones: DLM 1 with independent movements of the fuel and radial blanket subassemblies, and DLM 2 with a core combined movement. The non-linear (NLM) ''CORALIE'' uses the same basic modelization (Finite Element Beams) but accounts for shocks. It studies the response of a diameter on flats and takes into account the fluid coupling and the wrapper tube flexibility at the pad level. Damping consists of one modal part of 2% and one part due to shocks. Finally, ''CORALIE'' yields the time-history of the displacements and efforts on the supports, but damping (probably greater than 2%) and fluid-structures interaction are still to be precised. The validation experiments were performed on a RAPSODIE core mock-up on scale 1, in similitude of 1/3 as to SPX 1. The equivalent linear model (ELM) was developed for the SPX 1 reactor-block response analysis and a specified seismic level (SB or SM). It is composed of several oscillators fixed to the diagrid and yields the same maximum displacements and efforts than the NLM. The SPX 1 core seismic analysis with a diagrid input spectrum which corresponds to a 0,1 g group acceleration, has been carried out with these models: some aspects of these calculations are presented here

  14. El sistema educativo y el trabajo en Venezuela

    Morillo Moreno, Marysela C.

    2009-01-01

    El sistema educativo y en el mercado laboral se trabaja con el más importante y valioso recurso: el humano, el cual presenta unas características muy peculiares que merecen ser estudiadas como una rama de la economía como lo es la economía de la educación y la economía laboral. En Venezuela, ambas ramas han sido poco abordadas, pues otros temas económicos han ocupado las reflexiones; sin embargo, las cifras de desempleo y los problemas sociales son cada vez más alarmantes, convirtiéndose en l...

  15. El parentesco como sistema en la interfaz bio-cultural

    G??mez Garc??a, Pedro

    2011-01-01

    Aqu??, he centrado mi investigaci??n en la descripci??n del sistema de parentesco humano como constituido por una organizaci??n espec??fica, en la que se opera una articulaci??n bio-cultural. El parentesco no consiste solo en elementos biol??gicos, o m??s exactamente gen??ticos, ni tampoco ??nicamente en los determinantes sociales o culturales. Las relaciones familiares se constituyen y desarrollan en la interfaz entre el plano biogen??tico y el sociocultural, dando lugar a la formaci??n del ...

  16. SISTEMA SCADA PARA EL PROCESO DE PASTEURIZACION DE JUGOS

    Juan de Dios Contreras Cáceres

    2014-06-01

    Full Text Available La finalidad de este artículo es dar a conocer el proyecto desarrollado para diseñar e implementar un sistema SCADA (Supervisory Control And Data Adquisition aplicado al proceso de pasteurización de jugos. Se siguieron las etapas de diseño, partiendo de la elaboración del esquemático Layout, la programación del PLC, los drivers de comunicación y el diseño del software SCADA para una planta de jugos.

  17. Control de trazabilidad de fruta mediante un sistema RFID

    Asensio Nácher, Sergi

    2015-01-01

    En este proyecto se ha desarrollado una aplicación para realizar la trazabilidad de la fruta en un almacén utilizando dispositivos de radiofrecuencia RFID. El sistema ha sido desarrollado en C\\# y ha permitido automatizar todo el proceso de control de la fruta en un almacén. In this project, has been developed an application for making the traceability of fruit in a warehause by using radiofrequency systems RFID. The system was developed in C\\# and permits to control de processes of the fr...

  18. La reforma del sistema financiero peruano, 1990-1995

    Jorge Rojas

    1994-01-01

    El presente trabajo es la primera parte de una investigación sobre la reforma del sistema financiero peruano y busca, básicamente, hacer una descripción del proceso de reforma en sí, mientras que la segunda parte, aún en elaboración, tratará de evaluar los resultados de la reforma, haciendo uso extenso de estadísticas financieras que en esta primera parte no se trabajan. Lo que buscamos, entonces, es poder dar una idea clara de los cambios en las reglas de juego producidos por la reforma y de...

  19. Sistemas integrados de gestão empresarial

    Schmitt, Carlos Alberto

    2004-01-01

    Tese (doutorado) - Universidade Federal de Santa Catarina, Centro Tecnológico. Programa de Pós-Graduação em Engenharia de Produção. Para ser competitiva e acompanhar ou liderar a concorrência, uma empresa necessita empregar a tecnologia da informação. Neste contexto as empresas estão implementando ERP para gerenciar os seus recursos, fornecer serviços e produtos úteis aos clientes e garantir a integração de seus sistemas. Para alcançar o sucesso na implementação de um ERP e os resultados d...

  20. SISTEMA WEB DE GESTIÓN DE RECURSOS HUMANOS

    Peralta Rojas, Andrés Alejandro; Solorzano Sarmiento, David Alberto

    2015-01-01

    El departamento de Recursos Humanos de las Empresas llevan a cabo la gestión y control de los empleados manualmente (archivos impresos, documentos de Word y Excel) lo que conlleva a problemas como: gestión de trámites, pago de salarios no realizados a tiempo, poca comunicación con los empleados, deterioro de información laboral de los empleados archivados por largo tiempo. Para solucionar este problema nos basamos en la creación de un sistema web d...