Libros de ciencias, página 373 de 2843

ECOLOGY: THE ECONOMY OF NATURE

The Evolution of Molecular Biology: The Search for the Secrets of Life provides the historical knowledge behind techniques founded in molecular biology, also presenting an appreciation of how, and by whom, these discoveries were made. It deals with the evolution of intellectual concepts in the context of active research in an approachable language that accommodates readers from a variety of backgrounds. Each chapter contains a prologue and epilogue to create continuity and provide a complete framework of molecular biology. This foundational work also functions as a historical and conceptual supplement to many related courses in biochemistry, biology, chemistry, genetics and history of science. In addition, the book demonstrates how the roots of discovery and advances-and an individual's own research-have grown out of the history of the field, presenting a more complete understanding and context for scientific discovery.

Este libro de problemas es el fruto de muchas horas de trabajo. Lo he realizado a lo largo de años, poco a poco,preparando tanto las clases de problemas como los exámenes. Los problemas están extraídos de diferentes fuentes. Algunos son propuestas origin

En un futuro no demasiado lejano, las necesidades de abastecimiento de energía limpia serán fundamentales para la humanidad. El Estrecho de Gibraltar y sus dos corrientes. Una gran central maremotriz y otras utopias narra el desarrollo (quiza no tan utopico) de una magna obra de ingenieria que proporcionara la posibilidad de aprovechar las corrientes del Estrecho de Gibraltar para producir energia. Son numerosos los desafios quimericos a los que habran de enfrentarse los protagonistas, muchos de ellos propiciados por la incomprension y los fanatismos ideologicos.Pero la obra final abrira nuevas y esperanzadoras vias de desarrollo economico y social para todo el mundo.

Jorge Flores Valdés es uno de los personajes principales en la historia de la ciencia en México pues desde instituciones como la UNAM, la SEP y el FCE, ha creado, dirigido y fortalecido proyectos como el museo Universum, el Sistema Nacional de Investigadores o la colección de divulgación científica La Ciencia para Todos. Dispuestas en 225 breves capítulos, estas memorias recorren la vida personal y profesional de este físico mexicano, y muestran al mismo tiempo el desarrollo de la ciencia desde el periodo poscardenista hasta los primeros lustros del siglo XXI, convirtiéndose por todo ello en una referencia imprescindible para documentar y entender la ciencia actual en México.

La biodiversité des invertébrés d’eau douce, qui comprennent notamment des insectes, des crustacés et des mollusques, est très élevée dans les eaux courantes ou stagnantes. Très sensibles aux perturb

Praise for the Fourth Edition "As with previous editions, the authors have produced a leading textbook on regression." Journal of the American Statistical Association A comprehensive and up-to-date introduction to the fundamentals of regression analysis Introduction to Linear Regression Analysis, Fifth Edition continues to present both the conventional and less common uses of linear regression in today s cutting-edge scientific research. The authors blend both theory and application to equip readers with an understanding of the basic principles needed to apply regression model-building techniques in various fields of study, including engineering, management, and the health sciences. Following a general introduction to regression modeling, including typical applications, a host of technical tools are outlined such as basic inference procedures, introductory aspects of model adequacy checking, and polynomial regression models and their variations. The book then discusses how transformations and weighted least squares can be used to resolve problems of model inadequacy and also how to deal with influential observations. The Fifth Edition features numerous newly added topics, including: A chapter on regression analysis of time series data that presents the Durbin-Watson test and other techniques for detecting autocorrelation as well as parameter estimation in time series regression models Regression models with random effects in addition to a discussion on subsampling and the importance of the mixed model Tests on individual regression coefficients and subsets of coefficients Examples of current uses of simple linear regression models and the use of multiple regression models for understanding patient satisfaction data. In addition to Minitab, SAS, and S-PLUS, the authors have incorporated JMP and the freely available R software to illustrate the discussed techniques and procedures in this new edition. Numerous exercises have been added throughout, allowing readers to test their understanding of the material. Introduction to Linear Regression Analysis, Fifth Edition is an excellent book for statistics and engineering courses on regression at the upper-undergraduate and graduate levels. The book also serves as a valuable, robust resource for professionals in the fields of engineering, life and biological sciences, and the social sciences.

Mammals inhabit nearly every continent and every sea. They have adapted to life underground, in the frozen Arctic, the hottest deserts, and every habitat in-between. In Mammalogy Techniques Lab Manualthe only field manual devoted to training the next generation of mammalogistsbiologist and educator James M. Ryan details the modern research techniques todays professionals use to study mammals wherever they are found.Ideal for any mammalogy or wildlife biology course, this clear and practical guide aids students by getting them outside to study mammals in their natural environments. Twenty comprehensive chapters cover skull and tooth identification, radio and satellite GPS tracking, phylogeny construction, mark and recapture techniques, camera trapping, museum specimen preparation, optimal foraging, and DNA extraction, among other topics. Each chapter includes several exercises with step-by-step instructions for students to collect and analyze their own data, along with background information, downloadable sample data sets (to use when it is not practical to be out in the field), and detailed descriptions of useful open-source software tools.This pragmatic resource provides students with real-world experience practicing the complex techniques used by modern wildlife biologists. With more than 60 applied exercises to choose from in this unique manual, students will quickly acquire the scientific skills essential for a career working with mammals.

The Separable Galois Theory of Commutative Rings, Second Edition provides a complete and self-contained account of the Galois theory of commutative rings from the viewpoint of categorical classification theorems and using solely the techniques of commutative algebra. Along with updating nearly every result and explanation, this edition contains a new chapter on the theory of separable algebras. The book develops the notion of commutative separable algebra over a given commutative ring and explains how to construct an equivalent category of profinite spaces on which a profinite groupoid acts. It explores how the connection between the categories depends on the construction of a suitable separable closure of the given ring, which in turn depends on certain notions in profinite topology. The book also discusses how to handle rings with infinitely many idempotents using profinite topological spaces and other methods.

Whilst being a research monograph presenting new original results, the book is essentially self-contained and contains an introductory chapter reviewing the necessary preliminaries.The unifying techniques introduced in this book have applications beyond Mathematics.Good balance and integration between theoretical results and examples/applications.The book gets the reader to the core aspects of topos theory and the ways in which it can be applied to shed light on a variety of different mathematical subjects.

Hurwitz theory, the study of analytic functions among Riemann surfaces, is a classical field and active research area in algebraic geometry. The subject's interplay between algebra, geometry, topology and analysis is a beautiful example of the interconnectedness of mathematics. This book introduces students to this increasingly important field, covering key topics such as manifolds, monodromy representations and the Hurwitz potential. Designed for undergraduate study, this classroom-tested text includes over 100 exercises to provide motivation for the reader. Also included are short essays by guest writers on how they use Hurwitz theory in their work, which ranges from string theory to non-Archimedean geometry. Whether used in a course or as a self-contained reference for graduate students, this book will provide an exciting glimpse at mathematics beyond the standard university classes.

Algebraic groups play much the same role for algebraists as Lie groups play for analysts. This book is the first comprehensive introduction to the theory of algebraic group schemes over fields that includes the structure theory of semisimple algebraic groups, and is written in the language of modern algebraic geometry. The first eight chapters study general algebraic group schemes over a field and culminate in a proof of the Barsotti-Chevalley theorem, realizing every algebraic group as an extension of an abelian variety by an affine group. After a review of the Tannakian philosophy, the author provides short accounts of Lie algebras and finite group schemes. The later chapters treat reductive algebraic groups over arbitrary fields, including the Borel-Chevalley structure theory. Solvable algebraic groups are studied in detail. Prerequisites have also been kept to a minimum so that the book is accessible to non-specialists in algebraic geometry.

A completely reworked new edition of this superb textbook. This key work is geared to the needs of the graduate student. It covers, with proofs, the usual major branches of groups, rings, fields, and modules. Its inclusive approach means that all of the necessary areas are explored, while the level of detail is ideal for the intended readership. The text tries to promote the conceptual understanding of algebra as a whole, doing so with a masterful grasp of methodology. Despite the abstract subject matter, the author includes a careful selection of important examples, together with a detailed elaboration of the more sophisticated, abstract theories

Obra de extraordinario valor didáctico que presenta un desarrollo lógico de la trigonometría. El autor examina la interpretación analítica y deduce en forma simple las fórmulas clásicas de trigonometria plana. Correlaciona el plano cartesiano con los modelos geometricos regulares a fin de familiarizar al alumno con el estudio posterior de la geometria analitica.

Éste es uno de los pocos libros que existen en español cuyo propósito es explicar tan claramente como sea posible las ideas generales referentes a las ecuaciones en diferencias, usando para ello aplicaciones interesantes a la ingenieria y economia.