Libros de ciencias, página 30 de 2691

Noted for its crystal clear explanations, this book is considered the most comprehensive introductory text to structural equation modeling (SEM). Noted for its thorough review of basic concepts and a wide variety of models, this book better prepares readers to apply SEM to a variety of research questions. Programming details and the use of algebra are kept to a minimum to help readers easily grasp the concepts so they can conduct their own analysis and critique related research. Featuring a greater emphasis on statistical power and model validation than other texts, each chapter features key concepts, examples from various disciplines, tables and figures, a summary, and exercises. Highlights of the extensively revised 4th edition include:-Uses different SEM software (not just Lisrel) including Amos, EQS, LISREL, Mplus, and R to demonstrate applications.-Detailed introduction to the statistical methods related to SEM including correlation, regression, and factor analysis to maximize understanding (Chs. 1 - 6).-The 5 step approach to modeling data (specification, identification, estimation, testing, and modification) is now covered in more detail and prior to the modeling chapters to provide a more coherent view of how to create models and interpret results (ch. 7).-More discussion of hypothesis testing, power, sampling, effect sizes, and model fit, critical topics for beginning modelers (ch. 7).- Each model chapter now focuses on one technique to enhance understanding by providing more description, assumptions, and interpretation of results, and an exercise related to analysis and output (Chs. 8 -15).-The use of SPSS AMOS diagrams to describe the theoretical models.-The key features of each of the software packages (Ch. 1).-Guidelines for reporting SEM research (Ch. 16).

Based on their extensive experience with teaching R and statistics to applied scientists the authors provide a beginner s guide to R To avoid the difficulty of teaching R and statistics at the same time statistical methods are kept to a minimum The text covers how to download and install R import and manage data elementary plotting an introduction to functions advanced plotting and common beginner mistakes This book contains everything you need to know to get started with R

Utilizava-se a urtiga contra os problemas respiratórios, fazia-se uma cura com dente-de-leão para desintoxicar o corpo, recorria-se à arnica para tratar das feridas, às cataplasmas de aloé para alivi

A guide to finding birds in Italy, including Sardinia and Sicily. It covers 100 birding spots, and a further 40 are briefly cited as nearby areas, giving information about the best time for birding, how to get there, site maps and species lists. It deals with 119 different species giving information about their distribution, status and habitat. In this work, the site account section covers 100 different important birding spots, and a further 40 are briefly cited as nearby areas, giving detailed information about the best time for birding, how to get there, site maps and species lists. This book however, is not merely a locality guide. 'The most important Italian birds' section deals with 119 different species giving concise information about their distribution, status and habitat. A very useful 'where to watch' paragraph helps the reader to find, specifically, the right birding site. A chapter about endemic or sub-endemic sub-species for Italy is also provided. If you are visiting Italy for reasons other than birding and have limited free time, this guide helps you to choose the nearest and most interesting site.Alternatively, a more complete trip to Italy can be planned to take in the most important Italian species including Pygmy Cormorant, Rock and Barbary Partridge, Lanner, Wallcreeper, Pine Bunting, Isabelline Wheatear and many others.

An urgent account of the state of our oceans today and what we must do to protect them

We all need help centering ourselves to serve ourselves and our world In this small beautiful book the Kogi a remote and ancient tribe in the mountains of Colombia offer their learnings They pose nine thought provoking questions to help us live harmoniously with the earth and in turn find happiness and purpose in every moment Just as we are both sitting here and talking this is how we can live well All of this you will write in the book Mama Jose Gabriel a spiritual guide of the Kogi tribe to author Lucas Buchholz For centuries the Kogi have lived in seclusion in Colombia s remote Sierra Nevadas known as the heart of the world But in recent years concerned by the environmental degradation they have experienced in their villages and forests a few emissaries from the tribe emerged to bring an urgent and loving message to the West advice on how to live in harmony with the earth Buchholz was invited to their home to receive and transcribe this message A Book of Balance takes us on a journey into a startlingly beautiful landscape and into a sacred space the traditional fireside circle held regularly by the tribe In this circle members consider key questions essential to their community In this slim volume of spiritual introspection they ask us to

A compendium of sounds from this world and beyond from the author of A New Map of Wonders and The Book of Barely Imagined Beings

A compendium of sounds from this world and beyond from the author of A New Map of Wonders and The Book of Barely Imagined Beings

Las grandes preguntas que alimentan nuestra insaciable curiosidad.¿Cuál fue el origen de todo? ¿Podemos viajar en el tiempo? ¿Que es la vida? ¿Podría haber otras vidas en el Universo? Estas son algunas de las preguntas que el cientifico Carlos Briones nos propone en su nuevo libro, un apasionante viaje a traves de los principales retos que la ciencia actual tiene planteados. A lo largo de 52 breves y sugerentes capitulos, uno por cada semana del año, repasa diferentes campos cientificos, tecnologicos y sociales, sin olvidar temas de gran actualidad como la inteligencia artificial, la crisis climatica, las pandemias, o el auge de las pseudociencias y los bulos. Reivindica la importancia del espiritu critico y la curiosidad, y lo hace con una insuperable de combinacion de rigor cientifico, frescura y calidad literaria. En sus propias palabras: "creo que este libro puede gustarte tengas la edad que tengas: seas un boomer, pertenezcas a la Generacion X, a la Y de los millennials o a la Z. En breve, tambien si eres de la Alfa".

«A brea de avelaíñas» é unha obra sobre o cambio climáticona que o prestixioso ambientalista Michael McCarthy combinalembranzas, anécdotas e datos rigorosos enfocados á urxenciade frear a perda de bi

In A Brief History of Black Holes award winning University of Oxford researcher Dr Becky Smethurst charts five hundred years of scientific breakthroughs in astronomy and astrophysics Right now you are orbiting a black hole The Earth orbits the Sun and the Sun orbits the centre of the Milky Way a supermassive black hole the strangest and most misunderstood phenomenon in the galaxy In this cosmic tale of discovery Dr Becky Smethurst takes us from the earliest observations of the universe and the collapse of massive stars to the iconic first photographs of a black hole and her own published findings A cosmic tale of discovery Becky explains why black holes aren t really black that you never ever want to be spaghettified how black holes are more like sofa cushions than hoovers and why beyond the event horizon the future is a direction in space rather than in time Told with humour and wisdom this captivating book describes the secrets behind the most profound questions about our universe all hidden inside black holes A jaunt through space history with charming wit and many pop culture references BBC Sky At Night Magazine

A brilliant authoritative surprising captivating introduction to human genetics You ll be spellbound Brian Cox This is a story about you It is the history of who you are and how you came to be It is unique to you as it is to each of the 100 billion modern humans who have ever drawn breath But it is also our collective story because in every one of our genomes we each carry the history of our species births deaths disease war famine migration and a lot of sex In this captivating journey through the expanding landscape of genetics Adam Rutherford reveals what our genes now tell us about human history and what history can now tell us about our genes From Neanderthals to murder from redheads to race dead kings to plague evolution to epigenetics this is a demystifying and illuminating new portrait of who we are and how we came to be A thoroughly entertaining history of Homo sapiens and its DNA in a manner that displays popular science writing at its best Observer Magisterial informative and delightful Peter Frankopan An extraordinary adventure From the Neanderthals to the Vikings from the Queen of Sheba to Richard III Rutherford goes in search of our ancestors tracing the genetic clues deep into the past Alice Roberts

These are just some of the questions considered in the internationally acclaimed masterpiece by the world renowned physicist - generally considered to have been one of the world's greatest thinkers. It begins by reviewing the great theories of the cosmos from Newton to Einstein, before delving into the secrets which still lie at the heart of space and time, from the Big Bang to black holes, via spiral galaxies and strong theory. To this day A Brief History of Time remains a staple of the scientific canon, and its succinct and clear language continues to introduce millions to the universe and its wonders.

A Brief History of Time, published in 1988, was a landmark volume in science writing and in world-wide acclaim and popularity, with more than 9 million copies in print globally. The original edition was on the cutting edge of what was then known about the origins and nature of the universe. But the ensuing years have seen extraordinary advances in the technology of observing both the micro- and the macrocosmic world--observations that have confirmed many of Hawking''s theoretical predictions in the first edition of his book. Now a decade later, this edition updates the chapters throughout to document those advances, and also includes an entirely new chapter on Wormholes and Time Travel and a new introduction. It make vividly clear why A Brief History of Time has transformed our view of the universe.

Stephen Hawkings worldwide bestseller, A Brief History of Time, has been a landmark volume in scientific writing. Its authors engaging voice is one reason, and the compelling subjects he addresses is another: the nature of space and time, the role of God in creation, the history and future of the universe. But it is also true that in the years since its publication, readers have repeatedly told Professor Hawking of their great difficulty in understanding some of the books most important concepts. This is the origin of and the reason for A Briefer History of Time: its authors wish to make its content more accessible to readers as well as to bring it up-to-date with the latest scientific observations and findings. Although this book is literally somewhat briefer, it actually expands on the great subjects of the original. Purely technical concepts, such as the mathematics of chaotic boundary conditions, are gone. Conversely, subjects of wide interest that were difficult to follow because they were interspersed throughout the book have now been given entire chapters of their own, including relativity, curved space, and quantum theory. This reorganization has allowed the authors to expand areas of special interest and recent progress, from the latest developments in string theory to exciting developments in the search for a complete unified theory of all the forces of physics. Like prior editions of the bookbut even more soA Briefer History of Time will guide nonscientists everywhere in the ongoing search for the tantalizing secrets at the heart of time and space.