Author:
Publisher:
ISBN:
Category :
Languages : es
Pages : 108

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Author: José de Jésus Medel Juárez
Publisher: Instituto Politécnico Nacional
ISBN:
Category : History
Languages : es
Pages : 524

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Book Description
Temas Selectos de Sistemas en Tiempo Real está dirigido a profesores, investigadores y estudiantes de licenciatura y posgrado que tengan el interés de profundizar sus conocimientos sobre Sistemas en Tiempo Real y algunos temas específicos como definiciones formales, modelado de Tareas en Tiempo Real, teoría de Filtrado Digital en Tiempo Real y construcción de Manejadores de Dispositivos en Sistemas Operativos como QNX. El desarrollo del libro está centrado en la definición de Sistema en Tiempo Real: es aquel sistema que interactúa activamente en un entorno con dinámica conocida en relación con sus entradas, salidas y restricciones temporales, para darle un correcto funcionamiento de acuerdo con los conceptos de estabilidad, controlabilidad y alcanzabilidad.

Author: Luis Miguel Jiménez García
Publisher: Universidad Miguel Hernández
ISBN: 8416024464
Category : Technology & Engineering
Languages : es
Pages : 176

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Book Description
En este libro se introducen al lector en los conceptos básicos de los sistemas de tiempo real, sistemas en los cuales los tiempos de respuesta forman parte de la corrección de su respuesta y que deben, asimismo, interactuar con los elementos físicos de su entorno. Se incide especialmente en los aspectos informáticos debido a la importancia que tiene el computador como elemento fundamental de control de un sistema de tiempo real. Se profundiza en varios aspectos claves como son la tecnología de Sistemas Operativos y su enlace con la consecución de los aspectos de tiempo real, la formulación de requisitos temporales en las aplicaciones, la gestión de la multitarea, así como los aspectos cada vez más importantes planificación y comunicación entre procesos. Se ha escogido la especificación POSIX para particularizar y poner ejemplos prácticos de los diferentes conceptos presentados en cada capítulo. Los contenidos se ajustan a la docencia de estos contenidos en el Grado de Ingeniería Electrónica y Automática Industrial en el que se imparte la asignatura Sistemas de Control en Tiempo Real. Al final de cada capítulo, se incluye un esquema resumen del contenido de dicho capítulo que puede ayudar al lector a una mejor comprensión de los aspectos claves presentados. Adicionalmente, se incorpora una bibliografía complementaria al final de cada capítulo, que puede ser utilidad al lector especialmente cuando es utilizado como libro de consulta.

Author: Hector Leonardo Bolaños Muñoz
Publisher: Eae Editorial Academia Espanola
ISBN: 9783846566923
Category :
Languages : es
Pages : 84

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Book Description
Actualmente existen varias aplicaciones orientadas a la reingenieria, pero la mayoria se han centrado en aplicaciones de negocio donde las prioridades difieren notablemente de las aplicaciones en tiempo real, en las cuales son prioritarias las caracteristicas de desempeno, disponibilidad 7x24 y confiabilidad del sistema. Por consiguiente, realizar el mantenimiento de una aplicacion en tiempo real implica verificar que las modificaciones que se vayan a realizar no afecten considerablemente estas caracteristicas. Realizar el mantenimiento de una aplicacion requiere inicialmente del entendimiento del software y para lograrlo existen dos analisis de los sistemas: el estatico y el dinamico. La investigacion descrita en este documento concluye que para lograr una vision completa de un sistema es necesario correlacionar la informacion de los dos analisis mencionados, ya que cada uno muestra una faceta de la aplicacion que el otro no puede obtener. La herramienta desarrollada ofrece esta vision unificada para facilitar el entendimiento de los sistemas en tiempo real y puede ser utilizada durante las distintas fases del proceso de desarrollo."

Author: Mario Sanginés
Publisher: Inter-American Development Bank
ISBN: 1597821691
Category : Business & Economics
Languages : en
Pages : 198

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Book Description
The Fiscal Institutions of Tomorrow, the first publication in the series Institutions for People, addresses issues of public management that are key to economic development in Latin America and the Caribbean. It presents the challenges that the countries in the region face to strengthen fiscal institutions with a view to the future and with policy recommendations. This publication serves as reference material for policymakers and economic analysts interested in studying the evolution of fiscal institutions in the region and identifying areas to improve governance.

Author: Wilma Freire
Publisher: Pan American Health Org
ISBN: 9275116121
Category : Business & Economics
Languages : en
Pages : 261

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Book Description
This publication contains thirteen papers written by leading international public health professionals on a range of topics including the role of research into early childhood nutrition and the formulation of infant feeding policies; the control of iodine and vitamin A deficiencies; folic acid fortification of wheat flour; breast-feeding practices; nutrition recommendations within the context of local urban market realities; promoting active lifestyles and health urban spaces; and the importance of urban planning and public transport to public health objectives.

Author: Toss Gascoigne
Publisher: ANU Press
ISBN: 1760463663
Category : Science
Languages : en
Pages : 994

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Book Description
Modern science communication has emerged in the twentieth century as a field of study, a body of practice and a profession—and it is a practice with deep historical roots. We have seen the birth of interactive science centres, the first university actions in teaching and conducting research, and a sharp growth in employment of science communicators. This collection charts the emergence of modern science communication across the world. This is the first volume to map investment around the globe in science centres, university courses and research, publications and conferences as well as tell the national stories of science communication. How did it all begin? How has development varied from one country to another? What motivated governments, institutions and people to see science communication as an answer to questions of the social place of science? Communicating Science describes the pathways followed by 39 different countries. All continents and many cultures are represented. For some countries, this is the first time that their science communication story has been told.

Author: Lorenzo Sciavicco
Publisher: Springer Science & Business Media
ISBN: 1447104498
Category : Technology & Engineering
Languages : en
Pages : 391

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Book Description
Fundamental and technological topics are blended uniquely and developed clearly in nine chapters with a gradually increasing level of complexity. A wide variety of relevant problems is raised throughout, and the proper tools to find engineering-oriented solutions are introduced and explained, step by step. Fundamental coverage includes: Kinematics; Statics and dynamics of manipulators; Trajectory planning and motion control in free space. Technological aspects include: Actuators; Sensors; Hardware/software control architectures; Industrial robot-control algorithms. Furthermore, established research results involving description of end-effector orientation, closed kinematic chains, kinematic redundancy and singularities, dynamic parameter identification, robust and adaptive control and force/motion control are provided. To provide readers with a homogeneous background, three appendices are included on: Linear algebra; Rigid-body mechanics; Feedback control. To acquire practical skill, more than 50 examples and case studies are carefully worked out and interwoven through the text, with frequent resort to simulation. In addition, more than 80 end-of-chapter exercises are proposed, and the book is accompanied by a solutions manual containing the MATLAB code for computer problems; this is available from the publisher free of charge to those adopting this work as a textbook for courses.

Author: Emily S. Andrews
Publisher: World Bank Publications
ISBN: 0821365525
Category : Business & Economics
Languages : en
Pages : 198

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Book Description
"Formal pension systems are an important means of reducing poverty among the aged. In recent years, however, pension reform has become a pressing matter, as demographic aging, poor administration, early retirement, and unaffordable benefits have strained pension balances and overall public finances. Pension systems have become a source of macroeconomic instability, a constraint to economic growth, and an ineffective and/or inequitable provider of retirement income."

Author: Gustavo Alonso
Publisher: Springer Science & Business Media
ISBN: 3662108763
Category : Computers
Languages : en
Pages : 369

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Book Description
Like many other incipient technologies, Web services are still surrounded by a substantial level of noise. This noise results from the always dangerous combination of wishful thinking on the part of research and industry and of a lack of clear understanding of how Web services came to be. On the one hand, multiple contradictory interpretations are created by the many attempts to realign existing technology and strategies with Web services. On the other hand, the emphasis on what could be done with Web services in the future often makes us lose track of what can be really done with Web services today and in the short term. These factors make it extremely difficult to get a coherent picture of what Web services are, what they contribute, and where they will be applied. Alonso and his co-authors deliberately take a step back. Based on their academic and industrial experience with middleware and enterprise application integration systems, they describe the fundamental concepts behind the notion of Web services and present them as the natural evolution of conventional middleware, necessary to meet the challenges of the Web and of B2B application integration. Rather than providing a reference guide or a "how to write your first Web service" kind of book, they discuss the main objectives of Web services, the challenges that must be faced to achieve them, and the opportunities that this novel technology provides. Established, as well as recently proposed, standards and techniques (e.g., WSDL, UDDI, SOAP, WS-Coordination, WS-Transactions, and BPEL), are then examined in the context of this discussion in order to emphasize their scope, benefits, and shortcomings. Thus, the book is ideally suited both for professionals considering the development of application integration solutions and for research and students interesting in understanding and contributing to the evolution of enterprise application technologies.