Libros de ciencias, página 612 de 2701

Juan Segura García del RíoReflexions sobre la revolució biotecnològica i el seu impacte en la societat i en la universitat. Lliçó magistral llegida en el solemne acte d´obertura del curs 2003-2004.

La ciencia suele presentarse en los libros como un conjunto de conocimientos sobre el mundo. Pero conocer los contenidos de la ciencia no es lo mismo que entenderla. Sabemos que la Tierra es redonda y que gira alrededor del Sol, pero ¿podriamos explicar por que lo sabemos y como hemos llegado a averiguarlo? Si queremos ir mas alla de la ciencia para dummies, tenemos que verla no como un repertorio de respuestas, sino como una disciplina del pensamiento: una manera de mirar el mundo, de hacerse preguntas y de responderlas.

La ciencia suele presentarse en los libros como un conjunto de conocimientos sobre el mundo. Pero conocer los contenidos de la ciencia no es lo mismo que entenderla. Sabemos que la Tierra es redonda y que gira alrededor del Sol, pero ¿podriamos explicar por que lo sabemos y como hemos llegado a averiguarlo? Si queremos ir mas alla de la ciencia para dummies, tenemos que verla no como un repertorio de respuestas, sino como una disciplina del pensamiento: una manera de mirar el mundo, de hacerse preguntas y de responderlas. Este libro quiere enseñar esa manera de pensar de los cientificos. Para ello, evita deliberadamente la ciencia de vanguardia y va a las raices, donde el lector puede pensar por si mismo, y explorar como surgieron los conceptos claves de las ciencias fisicas desde su origen, viajando desde su infancia en la Grecia clasica, hasta su mayoria de edad con Newton. No requiere ningun conocimiento previo. Al contrario, la dificultad sera mas bien desaprender para olvidar las respuestas prefabricadas que nos contaron en el colegio, recuperar la mirada original de los protagonistas de la ciencia y, ademas, atreverse a pensar como Tales, Aristarco, Galileo o Newton: como personas inteligentes.

Cuando cuatro años de tormentas y sequías dejaron al borde del colapso su granja en Dakota del Norte, Gabe Brown decidió algo simple y valiente: trabajar con la naturaleza. El giro lo cambió todo: una tierra erosionada se transformo en un ecosistema vivo, productivo y rentable.En esta obra referente de agricultura regenerativa, Brown comparte los cinco principios que cualquiera puede aplicardel jardin a la granja: perturbacion minima, cobertura permanente, diversidad vegetal, raices vivas todo el año e integracion animal con pastoreo planificado. Con ellos aumento la materia organica, infiltro mas agua de lluvia, redujo insumos y mejoro margenes sin sacrificar rendimiento. Es, sobre todo, un cambio de mirada: pasar de matar para producir a gestionar procesos ecologicos que devuelven fertilidad y resiliencia.La trayectoria de Brown trascendio su rancho: es uno de los pioneros del movimiento de salud del suelo, ganador del NRDC Growing Green Award (2012) y figura destacada del documental Kiss the Ground (Netflix), que acerco estas ideas al gran publico.De tierra muerta a suelo vivo combina relato en terreno y guia practica: principios claros, ejemplos reales y herramientas para diseñar rotaciones, mezclar cultivos de cobertura y planificar el pastoreo. Si buscas empezar hoy con algo concretomejorar tu huerta, tu parcela o tu campoeste libro te muestra el como y el por que... para cosechar un futuro fertil.Necesitamos reintegrar ganado y cultivos en nuestras granjas y ranchos, y Gabe Brown nos muestra como hacerlo bien. Temple Grandin, autora de Animals in Translation.Texto sagrado del movimiento de agricultura regenerativa. The Observer.Un pionero del no-till regenerativo. NBC News.Un relato sobre como, ante la ruina financiera, Brown descubrio practicas rentables y favorables para el planeta. Hobby Farms."

DE VIPERIS TALENQUE ESCURÇONS es un libro del autor MONFERRER JOAN editado por ONADA EDICIONS. DE VIPERIS TALENQUE ESCURÇONS tiene un código de ISBN 978-84-18634-51-2, de la colección LA BARCELLA.

Few things seem as irreversible as death, whether for an individual or a species. But what would happen if death was reversible, if we could bring back to life something similar to the species that became extinct in the past? Recent developments in various techniques in molecular biology, among them cloning, synthetic genomes and genetic editing, have led to the emergence of a field of research that is in pursuit of de-extinction. This is a controversial ambition that presents far-reaching scientific, ethical, economic and social challenges. Even so, its proponents defend it as one of the possible ways to restore ecosystems and even fight against climate change. Explained over the course of this book are the possibilities for de-extinction and how they could transform the global ecosystem in the future.

Since the first experimental evidence for the existence of gravitational waves in 2015, the amount of data in this scientific area has increased enormously. There has also been a great deal of interest in the scientific community in gravitational waves. The interferometers, used to capture these waves, need to achieve a high level of instrumental sensitivity to be able to detect and analyse the weak signals emitted by both distant sources of intrinsically high intensity and nearby sources of much lower intensity. High sensitivity is often accompanied by high levels of noise that difficult data analysis. In nowadays interferometers, large amounts of data are recorded with a high percentage of noise from which we attempt to extract the possible gravitational waves buried therein. In this dissertation we propose to use a denoising method based on the minimisation of the total variance of the time series that constitute the data. Known as the ROF method, it assumes that the largest contribution to the total variance of a function comes from noise. In this way, a minimisation of this variance should lead to a drastic reduction in the presence of noise. This denoising procedure helps to improve the detection and data quality of gravitational wave analysis. We have implemented two ROF-based denoising algorithms in a commonly used gravitational-wave analysis software package. The analysis package is known as coherent WaveBurst (cWB) and uses the excess energy from the coherence between data from two or more interferometers to find gravitational waves. The denoising methods are the one-step regularised ROF (rROF), and the iterative rROF procedure (irROF). We have tested both methods using events from the gravitational-wave catalogue of the first three observing periods of the LIGO-Virgo-KAGRA scientific collaboration. These events, named GW1501914, GW151226, GW170817 and GW190521, comprise different wave morphologies of compact binary systems injected at different noise quality levels.

Mars once had an ocean larger than the Pacific.Mars once had an atmosphere.Mars once had life.They are all gone.What happened on Mars?And could it happen here?Dead Mars, Dying Earth, a stunning, true story of science on the brink, has been released to glowing reviews. This is the story of a NASA researchers remarkable transformation from an environmental skeptic to one of the leading proponents of the dangers of global warming.Written with the can''t-put-it-down narrative drive of good fiction, this scientific saga has been endorsed by everyone from a Nobel Laureate, a founder of Greenpeace, and New Age writer, James Redfield to the publisher of Skeptic Magazine and a wide spectrum of members of the business community.Dead Mars, Dying Earth is a lyrical, full-body immersion. You''ll be thrust from the surface of Mars aboard a meteor, race through history, witness cosmic dramas up close and personal, and plunge deeply into the depths of the ocean. And when the dust has settled you''ll discover that you are changed somehow endowed with the ability to create future possibility on a new and exotic planet: Earth.

Join the hugely popular presenter of Deadly 60 on a jaw dropping journey through the world s most dangerous animal encounters Packed with amazing facts about the deadliest animals on our planet Deadly is the ultimate compendium of Steve Backshall s most memorable experiences and dangerous encounters in the natural world From ancient predators and cold blooded killers to lethal lures and biggest bites Steve revisits some of the best known and most feared beasts in the animal kingdom Discover the formidable hunting skills of the orca the phenomenally painful sting of the bullet ant and the punching power of a mantis shrimp alongside many more superpowers and scary survival tactics within the natural world Drawing on over 25 years of experience in the field Steve takes a heart poundingly close look at the greatest record breakers in the animal kingdom determines who would come out on top in a showdown between the deadliest animals to have ever lived and shares the most dramatic moments of his adventures in pursuit of all things Deadly

Loyal readers of the monthly "Universe" essays in Natural History magazine have long recognized Neil deGrasse Tyson''s talent for guiding them through the mysteries of the cosmos with clarity and enthusiasm.Bringing together more than forty of Tyson''s favorite essays, "Death by Black Hole" explores a myriad of cosmic topics, from what it would be like to be inside a black hole to the movie industry''s feeble efforts to get its night skies right.One of America''s best-known astrophysicists, Tyson is a natural teacher who simplifies the complexities of astrophysics while sharing his infectious fascination for our universe.

Loyal readers of the monthly "Universe" essays in Natural History magazine have long recognized Neil deGrasse Tyson''s talent for guiding them through the mysteries of the cosmos with clarity and enthusiasm.Bringing together more than forty of Tyson''s favorite essays, "Death by Black Hole" explores a myriad of cosmic topics, from what it would be like to be inside a black hole to the movie industry''s feeble efforts to get its night skies right.One of America''s best-known astrophysicists, Tyson is a natural teacher who simplifies the complexities of astrophysics while sharing his infectious fascination for our universe.

A lo largo de este libro Fernando Magdaleno repasa los aspectos más complejos del binomio conservación-usos, así como los principales efectos de una gestión que no tenga en cuenta las múltiples interacciones entre agua y medio ambiente. También se abordan los principales riesgos medioambientales de la falta de aportes fluviales al mar, el funcionamiento ecológico de los ríos y su interacción con los ecosistemas litorales, además de las exigencias normativas en esta materia y su perspectiva socioeconómica.

Written by an award-winning writer and the leader of the Yellowstone Wolf Project, this definitive book recounts the years since the wolves’ return to Yellowstone.