Food webs hold a central place in ecology. They describe which organisms feed on which others in natural habitats. This book describes recently discovered empirical regularities in real food webs: it proposes a novel theory unifying many of these regularities, as well as extensive empirical data. After a general introduction, reviewing the empirical and theoretical discoveries about food webs, the second portion of the book shows that community food webs obey several striking phenomenological regularities. Some of these unify, regardless of habitat. Others differentiate, showing that habitat significantly influences structure. The third portion of the book presents a theoretical analysis of some of the unifying empirical regularities. The fourth portion of the book presents 113 community food webs. Collected from scattered sources and carefully edited, they are the empirical basis for the results in the volume. The largest available set of data on community food webs provides a valuable foundation for future studies of community food webs. The book is intended for graduate students, teachers and researchers primarily in ecology. The theoretical portions of the book provide materials useful to teachers of applied combinatorics, in particular, random graphs. Researchers in random graphs will find here unsolved mathematical problems.
Experts illuminate the challenges of achieving universal basic and secondary education, discussing the importance and difficulties not only of expanding access to education and but also of improving the quality of education.
This selection of papers encompasses recent methodological advances in several important areas, such as multivariate failure time data and interval censored data, as well as innovative applications of the existing theory and methods. Using a rigorous account of statistical forecasting efforts that led to the successful resolution of the John-Manville asbestos litigation, the models in this volume can be adapted to forecast industry-wide asbestos liability. More generally, because the models are not overly dependent on the U.S. legal system and the role of asbestos, this volume will be of interest in other product liability cases, as well as similar forecasting situations for a range of insurable or compensational events. Throughout the text, the emphasis is on the iterative nature of model building and the uncertainty generated by lack of complete knowledge of the injury process. This uncertainty is balanced against the court's need for a definitive settlement, and how these opposing principles can be reconciled. A valuable reference for researchers and practitioners in the field of survival analysis.
What is the minimum dimension of a niche space necessary to represent the overlaps among observed niches? This book presents a new technique for obtaining a partial answer to this elementary question about niche space. The author bases his technique on a relation between the combinatorial structure of food webs and the mathematical theory of interval graphs. Professor Cohen collects more than thirty food webs from the ecological literature and analyzes their statistical and combinatorial properties in detail. As a result, he is able to generalize: within habitats of a certain limited physical and temporal heterogeneity, the overlaps among niches, along their trophic (feeding) dimensions, can be represented in a one-dimensional niche space far more often than would be expected by chance alone and perhaps always. This compatibility has not previously been noticed. It indicates that real food webs fall in a small subset of the mathematically possible food webs. Professor Cohen discusses other apparently new features of real food webs, including the constant ratio of the number of kinds of prey to the number of kinds of predators in food webs that describe a community. In conclusion he discusses possible extensions and limitations of his results and suggests directions for future research.
Foundations of Biochemical Psychiatry provides information pertinent to the development of biochemical psychiatry, including biochemical studies of psychiatric patients before and after pharmacological intervention and genetic studies. This book discusses the development of biochemical psychiatry as a significant experimental and conceptual approach to understanding mental illness. Organized into 24 chapters, this book begins with an overview of the neurochemical processes involved in the elaboration of a behavior and the extent to which alterations in those processes are responsible for behavioral differences. This text then discusses the clinical characteristics of schizophrenia, including common symptoms, natural history, and subtypes. Other chapters consider the contribution of genetic factors to the etiology of schizophrenia. This book discusses as well the similarities among hallucinations, dreams, and primary process thinking. The final chapter deals with the factors that may influence the neuroendocrine system. This book is a valuable resource for psychiatrists, neuropharmacologists, neurobiologists, behavioral biologists, and psychoanalysts.
Optimize perioperative outcomes with Kaplan’s Cardiac Anesthesia! Dr. Joel L. Kaplan and a host of other authorities help you make the best use of the latest techniques and navigate your toughest clinical challenges. Whether you are administering anesthesia to cardiac surgery patients or to cardiac patients undergoing non-cardiac surgery, you’ll have the guidance you need to avoid complications and ensure maximum patient safety. Consult this title on your favorite e-reader, conduct rapid searches, and adjust font sizes for optimal readability. Compatible with Kindle®, nook®, and other popular devices. Update your understanding of cardiovascular and coronary physiology, and the latest advances in molecular biology and inflammatory response mechanisms. Master the newest approaches to perioperative assessment and management, including state-of-the art diagnostic techniques. Tap into the latest knowledge about 2D and 3D transesophageal echocardiography, anesthesia delivery for minimally invasive/robotic cardiac surgery, assist devices and artificial hearts, cardiac pacing, cardiac resynchronization therapy, ablation techniques, and more. Access the complete contents online at Expert Consult, plus additional online-only features including an ECG atlas...videos that demonstrate 2-D and 3-D TEE techniques in real time...and an Annual Year End Highlight from the Journal of Cardiovascular Anesthesia that’s posted each February. Clearly visualize techniques with over 800 full-color illustrations.
For more than 30 years, the highly regarded Secrets Series® has provided students and practitioners in all areas of health care with concise, focused, and engaging resources for quick reference and exam review. Nephrology Secrets : First South Asia Edition, features the Secrets' popular question-and-answer format that also includes lists, tables, and an easy-to-read style – making reference and review quick, easy, and enjoyable. - The proven Secrets® format gives you the most return for your time – concise, easy to read, engaging, and highly effective. - Covers the full range of essential topics in nephrology for in-training or practicing professionals. - Written and fully updated by global experts and thought leaders in nephrology. - Top 100 Secrets and Key Points boxes provide a fast overview of the secrets you must know for success in practice and on exams. - Portable size makes it easy to carry with you for quick reference or review anywhere, anytime.
Some of the possible implications among these comparisons remain open questions. The results in this book establish a new field of investigation for both mathematicians and scientific users interested in the variations among multiple probability distributions.
Taking an in-depth look at the causes of homelessness in the United States, Joel Blau disproves the convenient myths that most homeless are crazy, drug addicts, or lazy misfits who brought their suffering upon themselves. He shows that the current crisis was an inevitable result of economic and political changes in recent decades, systematically reviewing the explanations offered by researchers, politicians and pundits, from the deinstitutionalization of mental patients in the 1960s to the gentrification of urban neighborhoods in the 1970s to the evisceration of federal spending on social welfare in the 1980s. Blau argues that current government policies at every level are mired in pointless headcounting and quick-fix solutions that only push the homeless out of sight without touching the underlying causes. He advocates social reforms ranging form a national standard for welfare benefits, a higher minimum wage, and establishment of a social sector for non-profit, affordable housing. A powerful contribution to public debate on homelessness, The Visible Poor must be read by concerned citizens as well as by policy-makers and advocates.
Highly illustrated and easy to use, Dermatology in Pediatrics, by Drs. Donald Shenenberger, Bernard Cohen, Jonathan Glass, and Joel Spitz, is a practical, everyday reference not only for dermatologists and dermatology residents, but also for pediatricians, family medicine physicians, and other clinicians who care for children. For each dermatologic condition, you’ll find a two-page spread: on the left is concise, templated information on diagnosis and management; on the right are full-color illustrations and clinical photographs that provide real-world visual guidance. From cover to cover, an easy-to-navigate, open, and visually appealing layout speeds you to the information you need.
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