Maison d'édition: BookRix
In this book, exercises are carried out regarding the following mathematical topics: solving differential equations of various orders systems of differential equations Cauchy and Neumann initial value problems. Initial theoretical hints are also presented to make the conduct of the exercises understandable.
Christina Rasmussen has a way of putting us in direct contact with the multi-dimensional universe, one in which we can meet with those who have died through what she calls Temple Journeys. She has taught thousands to experience these journeys and says they are not guided meditations or visualizations.Voir livre
Widespread illegal poaching in the African wild is threatening elephants and putting them at risk of disappearing in 10 to 15 years. Using some of the same techniques developed to fight terrorism, a new intelligence-led effort spearheaded by a U.S. Air Force reservist is helping Kenyan wildlife service agents and police disrupt poaching networks. Special correspondent Jane Ferguson reports.Voir livre
Coronavirus disease is a virus that is part of a large family of viruses called coronaviruses (CoV). It has been known to cause common respiratory infections ranging from common diseases like the common cold to more critical illnesses such as severe acute respiratory syndrome (SARS) and Middle East Respiratory Syndrome (MERS). However, the Coronavirus disease (COVID-19) is a new strain of the coronaviruses that was discovered in 2019 that has never been previously identified in humans. This is a revised edition of the 2020 original version that discussed how dangerous the virus is, how it all started, the causes, the diagnosis and prevention. This updated version discusses the international response, the COVID-19 mortality, the COVID-19 vaccine and contains lots of updated data, facts and eliminates that which is outdated as of February 2021.Voir livre
It seems likely that scientists will someday discover how life can emerge on habitable planets like the early Earth and Mars.In Origin of Life: What Everyone Needs to Know®, David W. Deamer has written a comprehensive guide to the origin of life that is organized in three sections. The first section addresses questions such as: Where do the atoms of life come from? How old is Earth? What was the Earth like before life began? Where does water come from? After each question is answered, there is a follow-up: How do we know? This expands the horizon of the book, explaining how scientists reach conclusions and why we can trust these answers. The second section describes how certain organic molecules can spontaneously assemble into populations of protocells that can undergo selection and evolve toward primitive living systems. Here Deamer proposes a truly novel concept that life did not begin in the ocean but instead in fresh water hot springs on volcanic land masses resembling Hawaii today. True knowledge is not just what we know, but equally important is what we don't yet know. In the third section Deamer lists the outstanding questions that must be addressed before we can finally answer a fundamental question of biology: How can life begin?Voir livre
“It soon becomes clear that this book isn’t just about an athletic race. It’s also about the human race” (Bloomberg Businessweek). Having run in more than six hundred races over the span of fifty-five years, Ed Ayres is a legendary distance runner—and this book is his urgent exploration of the connection between individual endurance and a sustainable society. The Longest Race begins in 2001 at the starting line of the JFK 50 Mile—the nation’s oldest and largest ultramarathon and, like other such races, it’s an epic test of human limits and aspiration. At age sixty, his sights set on breaking the age-division record, Ayres embarks on a course over the rocky ridge of the Appalachian Trail, along the headwind-buffeted towpath of the Potomac River, and past momentous Civil War sites such as Harpers Ferry and Antietam. But even as Ayres focuses on an endurance runner’s familiar concerns—starting strong and setting the right pace, controlling his breathing, overcoming fatigue, and staying mindful of the course ahead—he finds himself as preoccupied with the future of our planet as with the finish line. A veteran journalist and environmental editor, Ayres reveals how the skills and mindset necessary to complete an ultramarathon are also essential for grappling anew with the imperative to endure—not only as individuals, but as a society—and not just for fifty miles, but over the real long haul, in a unique meditation that “ought to be required reading even for people who have never run a step” (The Boston Globe). “He seamlessly moves between discussing running to exploring larger life issues such as why we run, our impact on the environment, and the effects of the nation’s declining physical fitness . . . Thought provoking.” ―Booklist “To read this book is to run alongside a seasoned athlete, a deep thinker, and a great storyteller. And Ayres doesn’t disappoint: He is the best kind of running companion, generously doling out hilarious stories and hard-won insights into performance conditioning and the human condition. His lifetime of ultra-running and environmental writing drive his exploration of what keeps us running long distances―and what it might take to keep the planet from being run into the ground.” ―Nature Conservancy magazineVoir livre
“Profiles 600 of the most stunning, most wonderfully adapted beetles around . . . The result is a work that is nothing short of magnificent.” —Wired When renowned British geneticist J. B. S. Haldane was asked what could be inferred about God from a study of his works, Haldane replied, “An inordinate fondness for beetles.” With 350,000 known species, and scientific estimates that millions more have yet to be identified, their abundance is indisputable as is their variety. They range from the delightful summer firefly to the one-hundred-gram Goliath beetle. Beetles offer a dazzling array of shapes, sizes, and colors that entice scientists and collectors across the globe. The Book of Beetles celebrates the beauty and diversity of this marvelous insect. Six hundred significant beetle species are covered, with each entry featuring a distribution map, basic biology, conservation status, and information on cultural and economic significance. Full-color photos show the beetles both at their actual size and enlarged to show details, such as the sextet of spots that distinguish the six-spotted tiger beetle or the jagged ridges of the giant-jawed sawyer beetle. Based in the most up-to-date science and accessibly written, the descriptive text will appeal to researchers and armchair coleopterists alike. The humble beetle continues to grow in popularity, taking center stage in biodiversity studies, sustainable agriculture programs, and even the dining rooms of adventurous and eco-conscious chefs. The Book of Beetles is certain to become the authoritative reference on these remarkably adaptable and beautiful creatures. “Photographs of more than 600 colorful, glossy species, resembling bejeweled broaches morethan creepy crawlies, are presented at actual size.” —Publishers WeeklyVoir livre
