Ebooks de ciencias, página 36 de 726

This catalog is designed to deepen the understanding of the flora and vegetation in Arequipa, Peru, and serves as a valuable tool for researchers, conservationists, and nature lovers. Our goal is to broaden knowledge and foster an appreciation for the natural heritage of Arequipa, emphasizing the critical need to protect its diverse species.The catalog lists 1,350 species of wild ferns and flowering plants. For each species, there is a concise morphological description, information on its ecological and geographical distribution, uses by humans, and taxonomic notes. The appendix provides a detailed taxonomic key for all the species mentioned and a glossary of commonly used synonyms.

A Crisis Like No Other: Understanding and Defeating Global Warming couples engaging and creative storytelling with accurate details to explain global warming. It covers both the technical and human issues of global warming by addressing whats causing global warming, and why people dont believe it exists. The book tells readers how to convince others that global warming is not only real, but life-threatening, and offers a clearly laid out path to solve it. The book is accurate and carefully researched, drawing on the authors thirty years studying the science of global warming, and the human psyche that surrounds it. The author breaks down the subject into four parts, which can be thought of as four mini-books in one. The first part covers the psychology of global warming denial, how to defend ourselves against its lies and fake news, and how to convince others of global warmings grave harm. The second part describes exactly what global warming is. The third answers the question what makes us so sure? Finally, the last part provides a road map showing us how to defeat global warming. This book is comprehensive, fast paced, and easily accessible to readers from all walks of life. It provides an overview of everything one needs to know about global warming and, as such, is an excellent survey of global warming topics. In addition to being an easy and enjoyable read for the general public, A Crisis Like No Other: Understanding and Defeating Global Warming serves as a handy primer on climate change for environmental science classes.

Menschen und Hecken pflegen seit Jahrtausenden eine Beziehung der besonderen Art man denke nur an den Hollerbusch. Holunder, Schlehe, Weidorn waren nicht nur Feldgrenzen. Sie hatten im Volksglauben eine wichtige Schutzfunktion, inspirierten zu Mythen und Legenden, spendeten Fruchte und Blatter fur Nahrung und Medizin. Rudi Beiser, bekannt fur sein umfangreiches Wissen zur aktuellen Heilpflanzenkunde, zu Brauchtum und Volksheilkunde, nimmt Sie mit auf eine Reise zu 23 unserer heimischen Straucher. Er beleuchtet Volksglauben, traditionelle und moderne Naturheilkunde mit Heil- und Genussrezepten, die okologische Bedeutung und Tipps fur Straucher im eigenen Garten.

Maibaum, Barbarazweige und Hexen in der Walpurgisnacht das sind altbekannte Brauche. Aber was genau hat es damit auf sich? Woher stammen solche Rituale und welche magischen Pflanzen sind beteiligt? Lassen Sie sich in die geheimnisvolle Welt unserer Heilpflanzen entfuhren. Das Wissen um Pflanzenmagie und Krauterbrauchtum ist uralt und existiert noch heute. Alte Pflanzenrituale und Aberglaube werden von Heilpflanzen-Experte Rudi Beiser spannend erklart, gedeutet und eingeordnet und durch neun ausgewahlte magische Pflanzenportrats mit Leben gefullt. Zahlreiche Ideen und Rezepte uberfuhren altes Brauchtum und Rituale in die heutige Zeit.

This first full-length biography of Sir John Herschel tells of a remarkable man who contributed to nearly every branch of astronomy, and to half a dozen other sciences as well. The only son of the astronomer Sir William Herschel (founder of stellar astronomy and discoverer of the planet Uranus), he comes vividly to life in descriptions of his personality and his varied achievements. Making admirable use of John Herschels unpublished correspondence, diaries, and notebooks, the author covers his extensive astronomical observations at Cape Town in South Africa, his pioneering work in photography and in physical optics in Britain, his unhappy experiences as Master of the Mint - and much more. John Herschel was so attractive and enterprising an individual that his biography will appeal to general readers as well as to professionals - historians of science, astronomers, and scientists in related fields.

Gli argomenti di Fisica Generale sono finalizzati allo studio delle applicazioni alla Fisiologia Umana e alla descrizione del funzionamento delle apparecchiature utilizzate in ambito sanitario. Vengono analizzati, sia in termini descrittivi che quantitativi, le funzioni fondamentali svolte dai principali sistemi: sollecitazioni meccaniche sulle ossa lunghe a trazione, compressione, flessione, torsione; sistema circolatorio; influenza del raggio dei vasi sulla resistenza idraulica; portata e velocita?; pressione transmurale e pressione di perfusione; parametri emodinamici a riposo e sotto sforzo; resistenza idraulica totale; raggio equivalente del circolo sistemico; bilancio energetico in presenza di stenosi o aneurisma; lavoro e potenza del cuore; legge di Laplace e raggio dei vasi; filtrazione e assorbimento capillare; gradiente idrostatico e gradiente osmotico; edema; tensione superficiale; capillarita?; embolia gassosa; andamento della pressione endopolmonare e della pressione intrapleurica nella respirazione naturale e forzata; potenza basale, metabolica e meccanica; rendimento del corpo umano e potenza trasmessa allambiente in funzione del gradiente di temperatura e dellumidita? relativa; equilibrio termico; trasporto dellO2 e della CO2; composizione dellaria inspirata, dellaria alveolare e dellaria espirata; curva di dissociazione dellemoglobina; potere ossiforico del sangue arterioso e venoso; flusso di ossigeno ai tessuti; ossigeno estratto; potenza metabolica e fabbisogno daria; ipossia anossica, stagnante, anemica; acidosi e alcalosi respiratoria; effetti della corrente elettrica sul corpo umano; tempo di contatto massimo ammissibile; interruttore differenziale; costituzione e funzionamento del defibrillatore; lelettrocardiogramma; modello elettrico del cuore; determinazione analitica dellasse elettrico cardiaco; deviazione assiale sinistra e destra; risonanza magnetica; magnetizzazione macroscopica; rilassamento longitudinale e trasversale e caratterizzazione tessutale; diottri piani e sferici e modello dellocchio; ametropie e loro correzione; il laser; pompaggio ottico; interazione tra fascio laser e tessuti; produzione e assorbimento dei raggi X; acustica; soglia di udibilita? e soglia del dolore; timpanogramma; audiometria tonale liminare; ultrasuoni nei tessuti biologici; ecografia. Gli strumenti matematici utilizzati sono compatibili con quelli posseduti dagli allievi e numerosi esercizi, risolti e commentati, mostrano lapplicazione della fisica generale alla fisiologia umana. Lampiezza del testo, sia in termini di numero di argomenti trattati che di grado di approfondimento degli stessi, e? proporzionata al numero di ore di lezione dei corsi.

We have lived in a world that had, until the arrival in 2020 of the coronavirus Covid-19, not suffered a serious pandemic for a century, and society had almost forgotten the enormous impact created by highly infectious diseases. Infectious diseases, however, played major roles in ending the Golden Age of Athens, wrecked Justinians plans to restore the Roman Empire to its former glory, and killed untold millions in Latin America after the Spanish invasion. Armies of Pestilence explores the impact of these diseases on history. Despite their importance, historians have tended to minimise the role of infectious disease - partly because of a lack of scientific knowledge, and this has resulted in a distorted view both of the past and of the danger of disease to modern society. In Armies of Pestilence, R.S. Bray, a distinguished biologist who here shows himself also to be an able historian, corrects this view. The book surveys the principal epidemics around the world and across the centuries, in each case discussing the origins of the outbreaks, the symptoms, the mortality rate and the social and economic effect. Where particular diseases cannot be identified with certainty the best scholarly opinions are discussed. Bray pays special attention to the infamous Yersina pestis, the organism that caused the Black Death. Other diseases discussed include malaria, smallpox, typhus, cholera and influenza, and AIDS. One of the themes of the book is the relationship between disease and war, with the former often causing more deaths than the latter, as was the case with the great influenza pandemic of 1918-19, at the end of the First World War. The inability of governments to deal effectively with disease is also made clear.

The revised and expanded second edition of the best-selling The Original Dog Bible remains the most comprehensive dog lovers resource on the market: 830 pages and over 500 color photographs cover every topic under the canine sun! The book is divided into eight parts, each fully illustrated and designed for easy reference, plus helpful, entertaining sidebars covering hundreds of related topics.Section I: "The Dog in Our World" starts with the domestication of dog and the development of breeds, explores the dogs place in world religion, folklore, and popular culture, and analyzes how the dog fits into our society in terms of rescue, animal welfare, legal matters, and ethical and social issues.Section II: "A New Dog" is a new owners primer to deciding upon the right dog, whether purebred or mixed breed, the requirements of keeping and caring for a dog, and various considerations before choosing a dog (children, size, energy, etc.). Individual chapters on finding a dog (from breeders, shelters, and rescue programs), preparing for the homecoming (puppy-proofing, supplies, safety), and bringing the dog home.Section III: "Life with a Dog" discusses pet-care partners (from doggy day care to boarding kennels to pet sitters), emergencies, lost-dog protocol, traveling with a dog, senior years, and activities with a dog. The expansive activities chapter covers agility, flyball, sledding, weigh pulling, canine freestyle, lure coursing, herding, field trials, dock diving, Schutzhund, tracking, showing, therapy, obedience trials, and more.Section IV: "Breeds" is the largest section in the book, providing an alphabetical catalog of over 250 purebred dogs, from Affenpinscher to Yorkshire Terrier, including all of the most popular breeds in the world as well as many little known breed. Each breed is represented by a full-color photograph and an article detailing alternative names, country of origin, kennel club group, history of breeds development, physical description, height/weight, temperament, activity level, health concernsall information necessary for owners to determine which breed would make the best companion for their life style and family.Section V: "Health" extends over 100 pages and covers establishing a veterinary regimen for a dog; infectious diseases and vaccinations; canine anatomy and bodily systems; reproduction and breeding; chronic disease and conditions; and diagnostic tests and techniques.Section VI: "Daily Care" provides owners with fundamental information about grooming dogs, including breed-specific needs, history of grooming, and home grooming requirements. A chapter titled "The Complete Guide to Feeding Your Dog" addresses essential canine nutrition, including selection of the right food, safety, special needs, supplemental, obesity, and owner precautions.Section VII: "Training and Behavior" could be a complete book unto itself, discussing canine communication, the importance of socialization, puppy training, house-training, specific kinds of training methods, equipment, adult-dog methods, and trick training. A chapter on solving behavioral problems covers difficulties owners might encounter with their pets, from barking and separation anxiety to aggression, eating, housetraining, and health-related problems.Section VIII: "Dogs and Work" includes a chapter about dogs who work and a chapter about people who work with dogs. The text discusses the many jobs dogs do in our society, from ancient roles like herding, guard...

We have lived in a world that had, until the arrival in 2020 of the coronavirus Covid-19, not suffered a serious pandemic for a century, and society had almost forgotten the enormous impact created by highly infectious diseases. Infectious diseases, however, played major roles in ending the Golden Age of Athens, wrecked Justinians plans to restore the Roman Empire to its former glory, and killed untold millions in Latin America after the Spanish invasion. Armies of Pestilence explores the impact of these diseases on history. Despite their importance, historians have tended to minimise the role of infectious disease - partly because of a lack of scientific knowledge, and this has resulted in a distorted view both of the past and of the danger of disease to modern society. In Armies of Pestilence, R.S. Bray, a distinguished biologist who here shows himself also to be an able historian, corrects this view. The book surveys the principal epidemics around the world and across the centuries, in each case discussing the origins of the outbreaks, the symptoms, the mortality rate and the social and economic effect. Where particular diseases cannot be identified with certainty the best scholarly opinions are discussed. Bray pays special attention to the infamous Yersina pestis, the organism that caused the Black Death. Other diseases discussed include malaria, smallpox, typhus, cholera and influenza, and AIDS. One of the themes of the book is the relationship between disease and war, with the former often causing more deaths than the latter, as was the case with the great influenza pandemic of 1918-19, at the end of the First World War. The inability of governments to deal effectively with disease is also made clear.

Ths book is intended to be a resource for those interested in science and religion and for those teaching this subject in schools. It is not intended to be an complete or an exhaustive examination of each of the many figures in this area but is only a brief introduction to their life and work.

Inspired by the life and times of Alexander von Humboldt, 1769-1859 , this biography follows Humboldt, who is considered the father of the Natural Sciences and in his day was as well known as Napoleon, and traces his childhood in what was then Prussia, his education at various Universities his training as a mining engineer and how he progressed into the sciences. Duringing the Age of Enlightenment, Humboldts journey to South America between 1799 and 1804 with Aime Bonpland, changed the course of both their lives and during this period of exploration, they sent back to Paris and Berlin some 6000 samples of new species, minerals and animals. En route the scientists collected a mass of detailed information - cartographical, geological, astronomical, botanical, anthropological and linguistic - that took a life time to decipher.

Con el presente libro se pretende ofrecer un texto básico para un curso de Inferencia Estadística en Matemáticas, Economía, informática, Ingenierías, Medicina, Biología, Psicología, Sociología y en definitiva para los estudios que necesitan modelizar la incertidumbre mediante la probabilidad para extraer conclusiones de esta modernizacion.Contiene los conceptos y metodos de la Estadistica moderna: un equilibrio entre el analisis de datos - con especial atencion a las representaciones graficas- y los modelos metamaticos, ambas cosas realizadas con el creciente uso delordenador.INDICE RESUMIDO: Introduccion a la estadistica matematica y estadisticos muestrales. Reduccion de datos. Estimacion puntual parametrica. Estimacion por regiones de confianza. Contrastes de hipotesis. Teoria de la decision. Analisisde la varianza y regresion lineal. Estadistica no parametrica.

Pollution of the aquatic environment is a real threat across the globe. It is becoming a topic of intense study for researchers. It has been updated and almost completely revised. The Mediterranean Sea has been recognized as a target hotspot of the world as the pollutant concentration in this region is greater than the levels in other oceans. The book summarizes research on marine pollutants in the Mediterranean Sea. It presents 5 concise reviews focusing on microplastics, rare earth elements and biotoxins which are now commonly found in the region. The Editors also emphasize on pollution problems in the Mediterranean region, with 2 chapters presenting studies on Lebanon and Morocco, respectively. The book adds to the collective information on Mediterranean marine pollution. Additionally, references are included at the end of each chapter for the benefit of advanced readers. The contributions also include discussions on important techniques used to monitor and control marine pollution, such as the bio-monitoring of effluents, and ecological impact assessment of microplastic pollution on fish and the environment. Audience Students and researchers in environmental science programs; policymakers in Mediterranean environmental agencies.

This reference book is the definitive guide to drone honey bees. The book equips readers with all the knowledge they need to know about drone bee biology and development, their role in the colony and improving the health of their colony. The book starts by providing a detailed review of the development of drone honey bees, their biology, morphometric features, interaction with the Queen and the haploid parthenogenesis. The book then delves into the pheromone profile and mating behavior of drones.

Menopause is a significant milestone in a womans life, marking the end of fertility and the start of a new phase. However, it can also bring many physical and emotional symptoms, such as hot flashes, mood changes, and a higher risk of osteoporosis and heart disease. Because of these issues, dealing with menopause can be a challenge. From Taboo to Wellness: The Facts behind Menopause is an informative guide to menopause. It provides clarity and accessibility for anyone interested in understanding the topic, and wants to deconstruct any myths that surround it with facts. From symptoms to treatments, this book covers everything you need to know about menopause in an engaging and easy-to-understand way. Written with the general reader in mind, this book explores the science behind menopause, as well as the male andropause and how it differs from the female experience. With insights into Hormone Replacement Therapy (HRT) and future treatments using stem cells, it gives a comprehensive understanding of the options for managing menopause. But thats not all the book also delves into the fascinating world of menopause in the animal kingdom, offering a unique perspective on how different species experience hormonal changes caused by this life-changing event.

This book introduces readers to the fundamentals of oxygen atom transfer reactions. It also gives mechanistic insights into the redox processes occurring through the oxygen atom transfer reactions. It also includes information about catalytic activation of oxygen through enzymes and oxo-metallic complexes. All topics are explored in separate chapters. Key features: - reviews the basic mechanisms in redox processes involving oxo-atom transfer reactions. - presents progress in the biomimetic activation of dioxygen related to the catalytic oxidations by synthetic metal organic complexes. - covers an important class of metal-organic compounds - nickel-oxygen species - generated in catalytic oxidation processes as oxygen atom transfer agents. - explains the mechanistic aspects of the heterogeneous photochemical redox processes via oxo-atom transfer reactions - provides references for further reading It is a reference for both professional scientists in the fields of chemistry, biology and applied sciences, and for graduate and undergraduate students interested in understanding reaction mechanisms involving oxygen.

Se ha procurado que este libro resulte de lectura cómoda, de una lectura que permita pensar, pero que no obligue a calcular. Por ello se ofrecen al lector los desarrollos algebraicos, evitando las consabidas expresiones: despues de algunas transformaciones elementales, se obtiene facilmente que..., etc.

La gravedad cuántica de lazos es uno de los enfoques más promisorios hoy en día para unificar los dos pilares de la física teórica moderna: la teoría cuántica y la relatividad general. Esta obra se trata del primer texto destinado a estudiantes de la titulacion de Fisica que cubre el tema, incluyendo en sus contenidos problemas y ejercicios. El libro tambien es de interes para entusiastas de la fisica que quieren un conocimiento mas detallado que el provisto por articulos de investigacion. El texto unicamente presupone conocimientos elementales de mecanica clasica y cuantica y no requiere saber relatividad general. Desarrolla la teoria, bosqueja algunas de sus aplicaciones modernas y aporta ideas a las polemicas que levanta este enfoque.

El libro tiene tres partes de distinto carácter:A. La primera está redactada como un curso elemental para un primer ciclo de la licenciatura en Física, pero su contenido es más completo que el de otros textos de este nivelB. La segunda parte esta constituida por 253 ejercicios resueltos y comentados que muestran como deben resolverse los problemas con el metodo caracteristico de este textoC. La tercera parte esta constituida por 17 apendices divididos en cuatro grupos de distinto caracter. Se trata con ellos de mostrar a los estudiantes que la Termodinamica no es solo lo que se presenta en el cuerpo del texto, sino que se extiende tambien a casos diferentes de los vistos en el.

El Algebra lineal y su interpretación geométrica se ha constituido en un bloque de conocimiento común e indispensable tanto en las licenciaturas de Ciencias como en las Ingenierías técnicas y superiores. Basado en los cursos impartidos por los autores para los alumnos de Ciencias Fisicas, el presente libro constituye un libro autosuficiente de Algebra y Geometria lineal, donde se encuentran la mayoria de los temas de la materia exigidos en las titulaciones mencionadas. De esta forma se presenta un estudio general de la estructura de espacio vectorial, clasificacion de endomorfismos, formas canonicas y complexificacion, asi como la estructura de espacio afin. Todos los temas son abordados con detalle y permiten el estudio de los distintos conceptos al alumno que se enfrente por primera vez en ellos.