Download or read book El riego Fundamentos hidr ulicos written by LOSADA VILLASANTE, ALBERTO and published by Ediciones Mundi-Prensa. This book was released on 2009-07-20 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Esta cuarta edición de "EL RIEGO. FUNDAMENTOS HIDRÁULICOS" mantiene los objetivos de las versiones anteriores. Las bases hidráulicas de las técnicas de riego y avenamiento se plantean y desarrollan con el análisis de corrientes en tuberías y acequias, relaciones de aforo y sistemas de impulsión. Se ha cuidado la presentación formal del estudio de redes a presión y, en particular, el del cálculo de ramales de riego por aspersión y goteo. También se estudian los principios del movimiento del agua en medios porosos, con ejemplos que fijan los principios esenciales de la filtración en saturación y subsaturación. La revisión realizada ha prestado atención especial al hecho de que la capacidad para comprender el análisis depende del grado de conocimientos básicos de que se dispone, siempre limitado. Por ello, da forma más clara a la relación entre las bases analíticas de las expresiones matemáticas, su forma gráfica y sus aplicaciones prácticas. A tal efecto, el tratamiento de las materias enunciadas ha sido objeto de un esfuerzo para facilitar el uso de las relaciones de cálculo convenientes sin violentar el criterio de no aligerar las conclusiones prácticas con un exceso de empirismo. Los ejercicios prácticos que culminan la obra han sido propuestos con la intención de aclarar, afianzar y complementar la materia desarrollada. Su resolución en hoja de cálculo significa un grado de precisión que representa un salto significativo sobre soluciones gráficas y manuales anteriores. En definitiva, al reestructurar parte de la materia tratada para hacerla más asequible, se ha procurado reducir la carga analítica al mínimo indispensable y, al mismo tiempo, abrir vías de cálculo a quienes estén familiarizados con técnicas usuales de ordenador.
Download or read book El Riego written by A. Losada Villasante and published by . This book was released on 1988 with total page 431 pages. Available in PDF, EPUB and Kindle. Book excerpt: El agua en la agricultura: hidraulica y riegos; Magnitudes fisicas, definicion y propiedades de los fluidos; Homogeneidad dimensional y semejanza; Cinematica de fluidos; Equilibrio de fluidos pesados, hidrostatica; Hidrodinamica; Dinamica del liquido real; Corrientes en carga; Corrientes libres; Hidrometria; Regimen y variable de corrientes fluidas forzadas; Impulsiones.
Download or read book El riego Fundamentos hidr ulicos 4a ed corregida written by A. Losada Villasante and published by . This book was released on 1995 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book El Riego written by A. Losada Villasante and published by . This book was released on 1995 with total page 489 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book El riego written by Villasante Losada (A.) and published by . This book was released on 1995 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How Tobacco Smoke Causes Disease written by United States. Public Health Service. Office of the Surgeon General and published by . This book was released on 2010 with total page 728 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report considers the biological and behavioral mechanisms that may underlie the pathogenicity of tobacco smoke. Many Surgeon General's reports have considered research findings on mechanisms in assessing the biological plausibility of associations observed in epidemiologic studies. Mechanisms of disease are important because they may provide plausibility, which is one of the guideline criteria for assessing evidence on causation. This report specifically reviews the evidence on the potential mechanisms by which smoking causes diseases and considers whether a mechanism is likely to be operative in the production of human disease by tobacco smoke. This evidence is relevant to understanding how smoking causes disease, to identifying those who may be particularly susceptible, and to assessing the potential risks of tobacco products.
Download or read book The Extent of Poverty in Latin America written by Oscar Altimir and published by . This book was released on 1982 with total page 126 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work originated in a research project for the measurement and analysis of income distribution in the Latin American countries, undertaken jointly by the Economic Commission for Latin America and the World Bank. The present paper presents estimates of the extent of absolute poverty for ten Latin American countries and for the region as a whole in the 1970s, on the basis of available household surveys and population censuses. They are based on country-specific poverty lines representing minimum acceptable levels of private consumption, drawn according to a food-based method. Such poverty lines - ranging from 150 to 250 dollars of annual household consumption per capita - express a normative definition of the absolute dimensions of poverty, partly based on expert appraisals and partly reflecting the actual behavior of low income households facing the life style projected by Latin American development. According to these estimates, 40 percent of Latin American households were poor at the beginning of the 1970s, the incidence of poverty being 26 percent in urban areas and 60 percent in rural areas. Urban poverty extended to more than one-third of urban households in some countries (Brazil, Colombia, Honduras) while affecting between 20 and 30 percent in others (Peru, Mexico, Venezuela), about 15 percent in Costa Rica and Chile and less than 10 percent in Argentina and Uruguay. The extent of poverty in rural areas would not be less than 20 percent in any case and would reach more than 60 percent in some countries. The corresponding poverty gaps were also estimated; in terms of total household income, they may represent manageable proportions (around 2-3 percent) in the better-off countries, but are in the 4-8 percent range in the bigger countries of the region and reach as much as 12 percent in Peru and 17 percent in Honduras.
Download or read book Times Gone By written by Vicente Pérez Rosales and published by Oxford University Press. This book was released on 2003-05-01 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: These memoirs trace the wild and adventurous life of Pérez Rosales from his childhood up to the 1860s. During that approximately half-century he saw and did more than a dozen ordinary men. At age eleven in Argentina he witnessed the executions of Luis and Juan Jose Carrera. From there, his activities and adventures took him on several journeys on sailing vessels around Cape Horn; to Paris, where he witnessed the July revolution of 1830; to various commercial endeavors including a distillery, the practice of medicine, and cattle smuggling; into service as an advisor to an Argentine warlord; as a miner for precious metals in the north of Chile; as participant in the California Gold Rush in 1849; as director of the government's project for German immigration and settlement in the wild south of Chile; and also as Chilean consul and immigration agent in Hamburg. Around the world, Rosales lived through many of his era's watershed moments. His exciting memoirs offer a chance to relive the rush and chaos of these times--from a much safer vantage.
Download or read book Public Sociology written by John Germov and published by Routledge. This book was released on 2020-07-22 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the future of work to the nature of our closest relationships, how do we understand the links between our personal troubles and wider public issues in society today? Now into its fourth edition, Public Sociology continues to highlight the relevance of a grounded sociological perspective to Australian social life, as well as encouraging students to apply a sociological gaze to their own lives and the communities in which they live. Public Sociology presents a wide range of topics in a user-friendly and accessible way, introducing key theories and research methods, and exploring core themes, including youth, families and intimate relationships, class and inequality and race and ethnic relations. All chapters have been extensively revised to bring them up to date in a fast-changing social world, reflecting the latest sociological debates in response to changing lifestyles and evolving political landscapes. In addition to updated statistics and research findings, an expanded glossary and the latest citations to the scholarly literature, the text features a completely new chapter on gender and sexualities with expanded discussion of LGBTIQ+. This new edition also explores contemporary issues ranging from the #MeToo movement to marriage equality, fake news and 'alt facts'. This is the essential sociological reference to help students make sense of a complex and challenging world. NEW TO THE FOURTH EDITION: * A new chapter on gender and sexualities and expanded discussion of intersectionality * Exploration of the latest social issues including #MeToo, rising inequality, and the 'post-truth' age * All chapters thoroughly revised and updated with the latest research * Updated book website with extra readings, YouTube clips, and case studies * A new feature, Visual Sociology, helps the reader analyse the power of visual messaging 'With a firm base in the richest traditions of the discipline and with a remarkably approachable format, this book offers an excellent introduction to a wide array of sociology's concerns, making it suitable for all Australian social science undergraduates.' Gary Wickham, Emeritus Professor of Sociology, Murdoch University 'A sophisticated yet accessible introduction to social identities, differences and inequalities, and social transformations.' Jo Lindsay, Professor in Sociology, Monash University 'Sweeping and lucid...communicates with ease and simplicity.' Toni Makkai, Emeritus Professor, College of Arts and Social Sciences, Australian National University
Download or read book Irrigation and Society in Medieval Valencia written by Thomas F. Glick and published by Belknap Press. This book was released on 1970 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt: Of the communal institutions elaborated by medieval Spaniards, the most significant and longest-lived were the irrigation communities which the Muslims had established centuries earlier in the Valencian region. The objective of these remarkably democratic communities was justice and equity in water distribution; and the irrigators succeeded in combining traditional rules with consensual authority to maintain their systems with a minimum of conflict. Above the community level, however, regional powers including king, nobles, church, and town all sought to derive, at each other's expense, the maximum benefit from the available water supply. The resultant interplay of power politics was a sharp contrast to the democracy of the communities. Thomas F. Glick has drawn on original documents of the fourteenth and fifteenth centuries to present in this volume a thorough and lively study of Valencian irrigation and society. In Part One Glick describes medieval Valencian irrigation in the epoch of its fullest documentation (1238-4500), focusing on the institutional dynamics of both the local irrigation communities--those irrigating from a single main canal--and the larger regional units, the huertas. He examines the huerta environment and the administration of the irrigation communities and then discusses intracommunity conflict, the city's role in irrigation development, the search for new sources of water, and regional arrangements for irrigation. Part Two is concerned generally with the spread of Islamic irrigation technology and, more specifically, with cultural diffusion and the persistence of cultural forms during the transition in Spain from Islamic to Christian rule. Here the author examines the antecedents of medieval Valencian irrigation on the basis of Islamic survivals in medieval Christian institutions and of comparative data from other Islamic irrigation systems. He also touches on aspects of acculturation and cultural transition that extend beyond the geographical and temporal bounds of this study, explaining that "the history of Spanish irrigation is but one example of the administrative creativity and genius for cultural synthesis which characterized Iberian culture at the dawn of themodern age."
Download or read book Smallholders Householders written by Robert McC. Netting and published by Stanford University Press. This book was released on 1993 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: Contrasting the prevailing theories of the evolution of agriculture, the author argues that the practice of smallholding is more efficient and less environmentally degrading than that of industrial agriculture which depends heavily on fossil fuel, chemical fertilizers, pesticides and herbicides. He presents a convincing case for his argument with examples taken from Africa, Asia, Europe and the Americas, and demonstrates that there are fundamental commonalities among smallholder cultures. "Smallholders, Householders" is a detailed and innovative analysis of the agricultural efficiency and conservation of resources practiced around the world by smallholders.
Download or read book Exploring Agrodiversity written by H. C. Brookfield and published by Columbia University Press. This book was released on 2001 with total page 371 pages. Available in PDF, EPUB and Kindle. Book excerpt: Small farmers are often viewed as engaging in wasteful practices that wreak ecological havoc. Exploring Agrodiversity sets the record straight: Small farmers are in fact ingenious and inventive and engage in a diverse range of land-management strategies, many of them resourcefully geared toward conserving resources, especially soil. Using case studies from Africa, Asia, Latin America, and the Pacific, this book provides in-depth analysis of agricultural diversity and explores its history.
Download or read book Introduction to Environmental Soil Physics written by Daniel Hillel and published by Elsevier. This book was released on 2003-12-17 with total page 511 pages. Available in PDF, EPUB and Kindle. Book excerpt: An abridged, student-oriented edition of Hillel's earlier published Environmental Soil Physics, Introduction to Environmental Soil Physics is a more succinct elucidation of the physical principles and processes governing the behavior of soil and the vital role it plays in both natural and managed ecosystems. The textbook is self-contained and self-explanatory, with numerous illustrations and sample problems. Based on sound fundamental theory, the textbook leads to a practical consideration of soil as a living system in nature and illustrates the influences of human activity upon soil structure and function. Students, as well as other readers, will better understand the importance of soils and the pivotal possition they occupy with respect to careful and knowledgeable conservation. - Written in an engaging and clear style, posing and resolving issues relevant to the terrestrial environment - Explores the gamut of the interactions among the phases in the soil and the dynamic interconnection of the soil with the subterranean and atmospheric domains - Reveals the salient ideas, approaches, and methods of environmental soil physics - Includes numerous illustrative exercises, which are explicitly solved - Designed to serve for classroom and laboratory instruction, for self-study, and for reference - Oriented toward practical problems in ecology, field-scale hydrology, agronomy, and civil engineering - Differs from earlier texts in its wider scope and holistic environmental conception
Download or read book Alluvial Geoarchaeology written by A. G. Brown and published by Cambridge University Press. This book was released on 1997-03-27 with total page 404 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive technical manual aimed at archaeologists, physical geographers, geologists and environmental scientists.
Download or read book South Brazil written by Omer W. Herrmann and published by . This book was released on 1940 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Colonization of Unfamiliar Landscapes written by Marcy Rockman and published by Psychology Press. This book was released on 2003 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of case studies examines the archaeological evidence for and interpretations of landscape learning from the movement of the first pre-modern humans into Europe to the English colonists at Jamestown.
Download or read book Economical Notes on Brazil written by Brazil. Ministério da Agricultura. Serviço de Informações and published by . This book was released on 1916 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:
