The Spinning Magnet

Autor: Alanna Mitchell
Publisher: Penguin
ISBN: 1101985186
File Size: 56,78 MB
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An engrossing history of the science of one of the four fundamental physical forces in the universe, electromagnetism, right up to the latest indications that the poles are soon to reverse and destroy the world's power grids and electronic communications A cataclysmic planetary phenomenon is gathering force deep within the Earth. The magnetic North Pole will eventually trade places with the South Pole. Satellite evidence suggests to some scientists that the move has already begun, but most still think it won't happen for many decades. All agree that it has happened many times before and will happen again. But this time it will be different. It will be a very bad day for modern civilization. Award-winning science journalist Alanna Mitchell's delightful storytelling introduces enchanting characters from investigations into magnetism in thirteenth-century France to the discovery in the Victorian era that electricity and magnetism emerge from the same force. No one has ever told so eloquently how the Earth itself came to be seen as a magnet, spinning in space with two poles, and that those poles dramatically, catastrophically reverse now and then... The recent finding that Earth's magnetic force field is decaying faster than previously thought, raising fears of an imminent pole reversal, ultimately gives The Spinning Magnet a spine-tingling urgency. When the poles switch, a process that takes many years, Earth is unprotected from solar radiation storms that would, among other things, wipe out all electromagnetic technology. No satellites, no Internet, no smartphones--maybe no power grid at all. Alanna Mitchell offers a beautifully crafted narrative history of ideas and science that readers of Stephen Greenblatt and Sam Kean will love.

The Spinning Magnet

Autor: Alanna Mitchell
Publisher:
ISBN: 9780143199083
File Size: 44,17 MB
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"The magnetic North Pole will eventually trade places with the South Pole. Satellite evidence suggests to some scientists that the move has already begun, but most still think it won't happen for many decades. All agree that it has happened many times before and will happen again. But this time it will be different. It will be a very bad day for modern civilization. Award-winning science journalist Alanna Mitchell tells in The Spinning Magnet the fascinating history of one of the four fundamental physical forces in the universe, electro-magnetism. From investigations into magnetism in 13th century feudal France and the realization six hundred years later in the Victorian era that electricity and magnetism were essentially the same, to the discovery that the earth was itself a magnet, spinning in space with two poles and that those poles aperiodically reverse, this is an utterly engrossing narrative history of ideas and science that readers of Stephen Greenblatt and Sam Kean will love. But the recent finding that the Earth's magnetic force field is decaying ten times faster than previously thought, portending an imminent pole reversal, ultimately gives this story a spine tingling urgency. When the poles switch, a process that takes many years, the Earth is unprotected from solar radiation storms that would, among other things, wipe out all electromagnetic technology. No satellites, no internet, no smart phones--maybe no power grid at all. Such potentially cataclysmic solar storms are not unusual. The last one occurred in 2012 and we avoided returning to the dark ages only because the part of the sun that erupted happened to be facing away from the Earth. One leading US researcher is already drawing maps of the parts of the planet that would likely become uninhabitable."--

Sea Sick

Autor: Alanna Mitchell
Publisher: McClelland & Stewart
ISBN: 1551993414
File Size: 12,20 MB
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All life — whether on land or in the sea — depends on the oceans for two things: • Oxygen. Most of Earth’s oxygen is produced by phytoplankton in the sea. These humble, one-celled organisms, rather than the spectacular rain forests, are the true lungs of the planet. • Climate control. Our climate is regulated by the ocean’s currents, winds, and water-cycle activity. Sea Sick is the first book to examine the current state of the world’s oceans — the great unexamined ecological crisis of the planet — and the fact that we are altering everything about them; temperature, salinity, acidity, ice cover, volume, circulation, and, of course, the life within them. Alanna Mitchell joins the crews of leading scientists in nine of the global ocean’s hotspots to see firsthand what is really happening around the world. Whether it’s the impact of coral reef bleaching, the puzzle of the oxygen-less dead zones such as the one in the Gulf of Mexico, or the shocking implications of the changing Ph balance of the sea, Mitchell explains the science behind the story to create an engaging, accessible yet authoritative account. From the Hardcover edition.

Malignant Metaphor

Autor: Alanna Mitchell
Publisher: ECW Press
ISBN: 1770907971
File Size: 67,78 MB
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“In addition to her clear medical explanations, Mitchell’s compassionate attitude will bring comfort to those readers and their loved ones facing a cancer diagnosis.” — Publishers Weekly Award-winning science writer Alanna Mitchell confronts cancer myths in this powerful and personal book, as she recounts her family’s experiences with the disease. When her beloved brother-in-law John is diagnosed with malignant melanoma, Mitchell throws herself into the latest clinical research, providing us with a clear description of what scientists know of cancer and its treatments. When John enters the world of alternative treatments, Mitchell does, too, looking for the science in untested waters. She comes face to face with the misconceptions we share about cancer, which are rooted in blame and anxiety, and opens the door to new ways of looking at our most-feared illness. p.p1 {margin: 0.0px 0.0px 0.0px 0.0px; font: 16.0px Times; -webkit-text-stroke: #000000} span.s1 {font-kerning: none} Beautifully written, at once deeply personal and rigorous, Malignant Metaphor is a compassionate and persuasive book that has the power to change the conversation about cancer.

Rapidly Solidified Neodymium Iron Boron Permanent Magnets

Autor: John J. Croat
Publisher: Woodhead Publishing
ISBN: 0081022263
File Size: 24,40 MB
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Rapidly Solidified Neodymium-Iron-Boron Permanent Magnets details the basic properties of melt spun NdFeB materials and the entire manufacturing process for rapidly solidified NdFeB permanent magnets. It covers the manufacturing process from the commercial production of the melt spun or rapidly solidified powder, to the production and properties of both isotropic bonded Nd and hot deformed anisotropic NdFeB magnets. In addition, the book discusses the development and history of bonded rare earth transition metal magnets and the discovery of the NdFeB compound, also covering melt spun NdFeB alloys and detailing the magnetization process and spring exchange theory. The book goes over the production of melt spinning development, the operation of a melt spinner, the processing of melt spun powder, commercial grades of NdFeB magnetic powder and gas atomized NdFeB magnetic powders. Lastly, the book touches on the major application and design advantages of bonded Nd Magnets. Features a unique perspective as the author is not only the inventor of NdFeB magnetic powder, but also played a key role in developing many of the technologies covered Provides a comprehensive look at the history, fundamental properties, production processes, design and applications of bonded NdFeB magnets Includes discussion of the rare earth supply challenge, politics, and systems as it impacts bonded NdFeB magnets

The Spinning Magnet

Autor: Alanna Mitchell
Publisher: Oneworld Publications
ISBN: 1786074257
File Size: 74,81 MB
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North is north and south is south. Or is it? Without electromagnetism, life on Earth would not be possible. The quest to understand it began with the idea that the magnet was a physical embodiment of the heavens, possessing as it did its own North and South poles. Could the discovery that, every once in a long while, the Earth’s magnetic poles switch places, significantly weakening the field’s protective power, be its end? It’s never happened in the history of humankind, but it has happened many times before and it will happen again... Alanna Mitchell travels the world to unveil the history of this enigmatic force, introducing the enchanting figures whose investigations into magnetism began in the thirteenth century and revealing how later scientists made their pivotal discoveries. The Spinning Magnet is a warning of a future where solar radiation storms wipe out power grids and electronic communications, but it is also a beautifully crafted narrative of one of the most powerful forces in the universe.

North Pole South Pole

Autor: Gillian Turner
Publisher: The Experiment
ISBN: 1615191321
File Size: 72,12 MB
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This “fantastic story” of one of physics’ great riddles takes us through centuries of scientific history (Simon Lamb, author of Devil in the Mountain). Why do compass needles point north—but not quite north? What guides the migration of birds, whales, and fish across the world’s oceans? How is Earth able to sustain life under an onslaught of solar wind and cosmic radiation? For centuries, the world’s great scientists have grappled with these questions, all rooted in the same phenomenon: Earth’s magnetism. Over two thousand years after the invention of the compass, Einstein called the source of Earth’s magnetic field one of greatest unsolved mysteries of physics. Here, for the first time, is the complete history of the quest to understand the planet’s attractive pull—from the ancient Greeks’ fascination with lodestone to the geological discovery that the North Pole has not always been in the North—and to the astonishing modern conclusions that finally revealed the true source. Richly illustrated and skillfully told, North Pole, South Pole unfolds the human story behind the science: that of the inquisitive, persevering, and often dissenting thinkers who unlocked the secrets at our planet’s core. “In recent years, many very good books for interested non-scientists have been published: Richard Dawkins’s Climbing Mount Improbable and The Ancestor’s Tale, Stephen Jay Gould’s The Lying Stones of Marrakech, and Dava Sobel’s Longitude and The Planets, to name some of them. North Pole, South Pole . . . is a worthy addition to that list . . . Turner has a great story to tell, and she tells it well.” —The Press (New Zealand)

Atom Land

Autor: Jon Butterworth
Publisher: The Experiment
ISBN: 1615193731
File Size: 22,29 MB
Format: PDF
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From a top physicist at CERN, the first guide to the fundamental units of matter and the forces that act on them--particle physics--since the discovery of the Higgs boson, the missing piece of the Standard Model, leading the reader from basic concepts to the cutting edge

A Taste For The Beautiful

Autor: Michael J. Ryan
Publisher: Princeton University Press
ISBN: 1400889154
File Size: 77,32 MB
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From one of the world's leading authorities on animal behavior, the astonishing story of how the female brain drives the evolution of beauty in animals and humans Darwin developed the theory of sexual selection to explain why the animal world abounds in stunning beauty, from the brilliant colors of butterflies and fishes to the songs of birds and frogs. He argued that animals have “a taste for the beautiful” that drives their potential mates to evolve features that make them more sexually attractive and reproductively successful. But if Darwin explained why sexual beauty evolved in animals, he struggled to understand how. In A Taste for the Beautiful, Michael Ryan, one of the world’s leading authorities on animal behavior, tells the remarkable story of how he and other scientists have taken up where Darwin left off and transformed our understanding of sexual selection, shedding new light on human behavior in the process. Drawing on cutting-edge work in neuroscience and evolutionary biology, as well as his own important studies of the tiny Túngara frog deep in the jungles of Panama, Ryan explores the key questions: Why do animals perceive certain traits as beautiful and others not? Do animals have an inherent sexual aesthetic and, if so, where is it rooted? Ryan argues that the answers to these questions lie in the brain—particularly of females, who act as biological puppeteers, spurring the development of beautiful traits in males. This theory of how sexual beauty evolves explains its astonishing diversity and provides new insights about the degree to which our own perception of beauty resembles that of other animals. Vividly written and filled with fascinating stories, A Taste for the Beautiful will change how you think about beauty and attraction.

Magnetic Current

Autor: Edward Leedskalnin
Publisher: Health Research Books
ISBN: 9780787305499
File Size: 37,34 MB
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The results of the authors two years experiment with magnets at Rock Gate. Magnetic current, what it is, how it is made, what makes it, and the way it runs in the wire.