Скачать книгу - Anxious Gravity

Written by a well-known author in the field, this book presents a modern understanding of the universe based on relativity, quantum physics and their elusive combination. It introduces the crucial theoretical ingredients in an accessible way, starting from the physics of Newton and developing subsequent theories all the way to the modern enigma of quantum gravity. The intermediate level presentation assumes only a general knowledge of math and physics, adopting a «two-level» approach: equations are retained throughout the chapters but set apart from the main text in boxes to allow for lay readers to understand the book. For scientists, researchers, students and lecturers in cosmology, astronomy, gravitation, quantum and theoretical physics; as well as mathematicians, students, lecturers, academics and non-experts in related fields with an interest in the subject.

The book is intended to serve as lecture material for courses on relativity at undergraduate level. Although there has been much written on special relativity the present book will emphasize the real applications of relativity. In addition, it will be physically designed with the use of box summaries so as to allow easy access of practical results. The book will be composed of eight chapters. Chapter 1 will give an introduction to special relativity that is the world without gravity. Implications will be presented with emphasis on time dilation and the Doppler shift as practical considerations. In Chapter 2, the four-vector representation of events will be introduced. The bulk of this chapter will deal with flat space dynamics. This will require the generalization of Newton's first and second laws. Some important astronomical applications will be discussed in Chapter 3 and in Chapter 4 some engineering applications of special relativity such as atomic clocks will be presented. Chapter 5 will be dedicated to the thorny question of gravity. The physical motivation of the theory must be examined and the geometrical interpretation presented. Chapter 6 will present astronomical applications of relativistic gravity. These include the usual solar system tests; light bending, time delay, gravitational red-shift, precession of Keplerian orbits. Chapter 7 will be dedicated to relativistic cosmology. Many of the standard cosmological concepts will be introduced, being mathematically simple but conceptually subtle. The concluding chapter will be largely dedicated to the global positioning system as an engineering problem that requires both inertial and gravitational relativity. The large interferometers designed as gravitational wave telescopes will be discussed here.

A fully-revised and updated new edition of a bestselling book designed to help parents, teachers, and counsellors support young people suffering from anxiety. Offers an array of innovative strategies organized into the authors’ four-step “COPE” program, which has undergone more than 20 years of successful field testing Each strategy is accompanied by a set of activities contextualized with full details of the appropriate age level, materials needed, suggested setting, and a template script Presents a straightforward account of anxiety, the most prevalent clinical diagnosis in young people, written with a careful balance of scientific evidence and benevolence Features a brand new chapter on preschoolers and a companion website that includes instructional MP3 recordings and a wealth of additional resources

Top Ten bestselling author Tess Gerritsen expands the scope of her landscape of terror in a thoroughly menacing new thriller. A brilliantly compulsive page-turner from the author of The Surgeon.Dr Emma Watson, a brilliant research physician, has been training for the mission of a lifetime: to study living organisms in space. Jack McCallum, Emma’s estranged husband, has shared her dream of space travel, but a medical condition has grounded him. Now he must watch from the sidelines…The mission aboard the space station turns into a nightmare when a culture of single-celled organisms begins to regenerate out of control – and infects the crew with agonising and deadly results. Emma struggles to contain the deadly virus, while back home Jack and NASA work against the clock to bring her home. But there will be no rescue, as the astronauts are left stranded in orbit where they are dying one by one…

The greatest threat to humanities survival is about to emerge from the depths of space.This bundle includes the first three books in New York Times bestselling author Ian Douglas’ Star Carrier series.There is a milestone in the evolution of every sentient race, a Tech Singularity Event, when the species achieves transcendence through its technological advances. Now the creatures known as humans are near this momentous turning point.But an armed threat is approaching from deepest space, determined to prevent humankind from crossing over that boundary—by total annihilation if necessary.To the Sh'daar, the driving technologies of transcendent change are anathema and must be obliterated from the universe—along with those who would employ them. As their great warships destroy everything in their path en route to the Sol system, the human Confederation government falls into dangerous disarray.There is but one hope, and it rests with a rogue Navy Admiral, commander of the kilometer-long star carrier America, as he leads his courageous fighters deep into enemy space towards humankind's greatest conflict—and quite possibly its last.Includes: Earth Strike, Centre of Gravity and Singularity.