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Estudio Mediante Simulacion Numerica De Union Heterogenea Acero De Alta Resistencia Metal Duro Aplicando Soldadura Fuerte
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Book Synopsis Estudio mediante simulación numérica de unión heterogénea acero de alta resistencia-metal duro aplicando soldadura fuerte by : Marta Gómez Vacas
Download or read book Estudio mediante simulación numérica de unión heterogénea acero de alta resistencia-metal duro aplicando soldadura fuerte written by Marta Gómez Vacas and published by . This book was released on 2016 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Los aceros para herramientas se caracterizan por tener una alta dureza y una alta resistencia, por ello, estos aceros suelen ser utilizados en la fabricación de herramientas de corte. Debido a que no existe ningún tipo de acero para herramientas en el cual se combinen todas las propiedades requeridas, los carburos cementados se presentan como un interesante complemento. De este modo, los cermets usados en la fabricación de herramientas se van a encontrar, de un modo u otro, soldados al acero del cuerpo de la herramienta. Debido a las tensiones residuales y defectos en la microestructura que se originan en el enfriamiento tras estos procesos, se descarta la posibilidad de usar técnicas de soldadura que impliquen fusión de los materiales. Este problema se solventa con el empleo de procesos de unión en estado sólido, como es el caso de la soldadura fuerte. Las tensiones residuales generadas en el enfriamiento de la junta de unión debido a la diferencia de propiedades entre los materiales a unir, pueden provocar pérdida de fortaleza estructural y llegar a provocar fractura. Para poder prevenir las posibles causas de estos fallos es una necesidad prioritaria evaluar, previamente al diseño de estas uniones, la magnitud y distribución de la tensión residual y los factores que la influyen. Los métodos de simulación numérica combinados con métodos experimentales han sido ampliamente empleados para el análisis y diseño de estructuras metálicas. La aplicación del método de elementos finitos (MEF) en la predicción de tensiones residuales y deformación de los componentes generadas tras el proceso de soldadura, es un procedimiento muy útil para poder explicar algunos de los complejos fenómenos que tienen lugar en las uniones soldadas y para poder predecir con más exactitud dónde se producirá el inicio de fractura. De este modo, el empleo de estos métodos numéricos puede llegar a jugar un importante papel en el desarrollo e innovación del diseño y optimización de uniones soldadas...
Book Synopsis Handbook of Ecological Restoration by : Martin R. Perrow
Download or read book Handbook of Ecological Restoration written by Martin R. Perrow and published by Cambridge University Press. This book was released on 2002-09-05 with total page 460 pages. Available in PDF, EPUB and Kindle. Book excerpt: This two-volume handbook is a comprehensive account of the rapidly emerging and vibrant science of the ecological restoration of habitats and species. Ecological restoration aims to achieve complete structural, functional, self-maintaining biological integrity following disturbance. In practice, any theoretical model is modified by a number of economic, social, and ecological constraints. Consequently, material that might be considered as rehabilitation, enhancement, re-construction, or re-creation is also included. Principles of Restoration defines the underlying principles of restoration ecology in relation to manipulations and management of the biological, geophysical, and chemical framework.
Book Synopsis Wetland Indicators by : Ralph W. Tiner
Download or read book Wetland Indicators written by Ralph W. Tiner and published by CRC Press. This book was released on 1999-04-21 with total page 426 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understand the current concept of wetland and methods for identifying, describing, classifying, and delineating wetlands in the United States with Wetland Indicators - capturing the current state of science's role in wetland recognition and mapping. Environmental scientists and others involved with wetland regulations can strengthen their knowledge about wetlands, and the use of various indicators, to support their decisions on difficult wetland determinations. Professor Tiner primarily focuses on plants, soils, and other signs of wetland hydrology in the soil, or on the surface of wetlands in his discussion of Wetland Indicators. Practicing - and aspiring - wetland delineators alike will appreciate Wetland Indicators' critical insight into the development and significance of hydrophytic vegetation, hydric soils, and other factors. Features Shows 55 color plates, documenting wetland indicators throughout the nation - with more than 34 soil plates and aerial photos Illustrates other wetland properties with more than 50 figures Provides over 60 tables, including extensive tables of U.S. wetland plant communities and examples for determining hydrophytic vegetation Contents Wetland Definitions Wetland Concepts for Identification and Delineation Plant Indicators of Wetlands and Their Characteristics Vegetation Sampling and Analysis for Wetlands Soil Indicators of Wetlands Wetland Identification and Boundary Delineation Methods Problem Wetlands and Field Situations for Delineation Wetland Classification Wetlands of the United States: An Introduction, With Emphasis on Their Plant Communities Wetland Mapping and Photointerpretation
Book Synopsis Handbook of Food Engineering Practice by : Kenneth J. Valentas
Download or read book Handbook of Food Engineering Practice written by Kenneth J. Valentas and published by CRC Press. This book was released on 1997-07-23 with total page 732 pages. Available in PDF, EPUB and Kindle. Book excerpt: Food engineering has become increasingly important in the food industry over the years, as food engineers play a key role in developing new food products and improved manufacturing processes. While other textbooks have covered some aspects of this emerging field, this is the first applications-oriented handbook to cover food engineering processes and manufacturing techniques. A major portion of Handbook of Food Engineering Practice is devoted to defining and explaining essential food operations such as pumping systems, food preservation, and sterilization, as well as freezing and drying. Membranes and evaporator systems and packaging materials and their properties are examined as well. The handbook provides information on how to design accelerated storage studies and determine the temperature tolerance of foods, both of which are important in predicting shelf life. The book also examines the importance of physical and rheological properties of foods, with a special look at the rheology of dough and the design of processing systems for the manufacture of dough. The final third of the book provides useful supporting material that applies to all of the previously discussed unit operations, including cost/profit analysis methods, simulation procedures, sanitary guidelines, and process controller design. The book also includes a survey of food chemistry, a critical area of science for food engineers.
Download or read book Polymer Permeability written by J. Comyn and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 387 pages. Available in PDF, EPUB and Kindle. Book excerpt: Polymers are permeable, whilst ceramics, glasses and metals are gener ally impermeable. This may seem a disadvantage in that polymeric containers may allow loss or contamination of their contents and aggressive substances such as water will diffuse into polymeric struc tures such as adhesive joints or fibre-reinforced composites and cause weakening. However, in some cases permeability is an advantage, and one particular area where this is so is in the use of polymers in drug delivery systems. Also, without permeable polymers, we would not enjoy the wide range of dyed fabrics used in clothing and furnishing. The fundamental reason for the permeability of polymers is their relatively high level of molecular motion, a factor which also leads to their high levels of creep in comparison with ceramics, glasses and metals. The aim of this volume is to examine some timely applied aspects of polymer permeability. In the first chapter basic issues in the mathema tics of diffusion are introduced, and this is followed by two chapters where the fundamental aspects of diffusion in polymers are presented. The following chapters, then, each examine some area of applied science where permeability is a key issue. Each chapter is reasonably self-contained and intended to be informative without frequent outside reference. This inevitably leads to some repetition, but it is hoped that this is not excessive.
Book Synopsis Trends in Food Engineering by : Jorge E. Lozano
Download or read book Trends in Food Engineering written by Jorge E. Lozano and published by CRC Press. This book was released on 2000-06-07 with total page 376 pages. Available in PDF, EPUB and Kindle. Book excerpt: Trends in Food Engineering presents a wide vision of food engineering, with an emphasis on topics vital to the food industry today. The first section deals with physical and sensory properties of food. The emphasis in these chapters is on structure-function relationships, food rheology, and the correlations between physicochemical and sensory data. The second section, on advances in food processing, includes recent developments in minimal preservation and thermal and nonthermal processing of foods. The book concludes with current topics in food engineering, including applied biotechnology, food additives, and functional properties of proteins.
Book Synopsis The Biology of Freshwater Wetlands by : Arnold G. van der Valk
Download or read book The Biology of Freshwater Wetlands written by Arnold G. van der Valk and published by OUP Oxford. This book was released on 2012-02-09 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global wetlands exhibit significant differences in both hydrology and species composition and range from moss-dominated arctic peatlands to seasonally-flooded tropical floodplains. They are increasingly recognized for the important services that they provide to both the environment and human society such as wildlife and fish production, nutrient filtering, and carbon sequestration. A combination of low oxygen levels and dense plant canopies present particular challenges for organisms living in this aquatic habitat. This concise textbook discusses the universal environmental and biological features of wetland habitats, with an emphasis on wetland plants and animals and their adaptations. It also describes the functional features of wetlands - primary production, litter decomposition, food webs, and nutrient cycling - and their significance locally and globally. The future of wetlands is examined, including the potential threats of global climate change and invasive species, as well as their restoration and creation. This new edition maintains the structure and style of the first, but is fully updated throughout with new chapters on invasive species, restoration/creation, global climate change, and the value of wetlands.
Download or read book Wetland Plants written by Julie K. Cronk and published by CRC Press. This book was released on 2016-04-19 with total page 484 pages. Available in PDF, EPUB and Kindle. Book excerpt: A detailed account of the biology and ecology of vascular wetland plants and their applications in wetland plant science, Wetland Plants: Biology and Ecology presents a synthesis of wetland plant studies and reviews from biology, physiology, evolution, genetics, community and population ecology, environmental science, and engineering. It provides a
Book Synopsis Organizational Behavior by : Stephen P. Robbins
Download or read book Organizational Behavior written by Stephen P. Robbins and published by Pearson South Africa. This book was released on 2009 with total page 580 pages. Available in PDF, EPUB and Kindle. Book excerpt: Robbins/Judge provide the research you want in the language your students understand; accompanied with the best selling self-assessment software, SAL. Some topics include management functions; the social sciences; helping employees balance work and other responsibilities; improving people skills; improving customer service; motivational concepts; communication; power and politics; conflict and negotiation; culture; and stress management. Globally accepted and written by one of the most foremost authors in the field, this is a necessary read for all managers, human resource workers, and anyone needing to understand and improve their people skills.
Book Synopsis Decide and Conquer by : Stephen P. Robbins
Download or read book Decide and Conquer written by Stephen P. Robbins and published by Pearson Education. This book was released on 2014-10-06 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: Make better decisions – every day, everywhere! Decide and Conquer, Second Edition
Book Synopsis The Truth About Managing People by : Stephen Robbins
Download or read book The Truth About Managing People written by Stephen Robbins and published by FT Press. This book was released on 2012-10-09 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the Third Edition of the bestselling book, The Truth About Managing People, bestselling author Stephen Robbins shares even more proven principles for handling virtually every management challenge. Robbins delivers 61 real solutions for the make-or-break problems faced by every manager. Readers will learn how to overcome the true obstacles to teamwork; why too much communication can be as dangerous as too little; how to improve your hiring and employee evaluations; how to heal "layoff survivor sickness"; how to manage a diverse culture; and ways to lead effectively in a digital world. New truths include: how to nurture friendly employees, forget about age stereotypes, first impressions count, be a good citizen, techniques for managing a diverse age group, and ethical leadership among others.
Book Synopsis Training in Interpersonal Skills by : Stephen P. Robbins
Download or read book Training in Interpersonal Skills written by Stephen P. Robbins and published by . This book was released on 1996 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Designed to supplement courses in organizational behavior, principles of management, human resource management, human relations, supervision and applied psychology. The only text available devoted exclusively to the development of interpersonal skills, this completely self-contained program provides an action-oriented approach in which students actually practice skills behavior.
Download or read book Real Managers written by Fred Luthans and published by . This book was released on 1988 with total page 222 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Managing Today! by : Stephen P. Robbins
Download or read book Managing Today! written by Stephen P. Robbins and published by . This book was released on 2000 with total page 651 pages. Available in PDF, EPUB and Kindle. Book excerpt: This unique, re-engineered book defines and describes the new "paradigm" brought on by recent dramatic changes in the field of management. Managing Today! redefines the traditional "functional" approach employed by previous management books to more accurately reflect recent, fundamental changes in the economy and workplace—changes that have significantly reshaped today's managers' jobs. Robbins' balanced approach presents an effective integration of theory and application displayed within a clear, visual design specifically tailored for today's readers. Coverage includes changing issues in today's workplace (risk, privatization, multiple skills, and continual retraining); culture shock; time-management skills; cycle-time reduction and technology transfer; virtual teams; human behavior; leadership; trust building; change management; and more. For human resources professionals, business managers/team leaders, and anyone interested in Organizational Behavior and Business Management.
