Spirals


Book Description

In this introduction to Spirals: From Theodorus to Chaos, Phil Davis writes, To me, mathematics has always been more than its form, or its content, its logic, its strategies, or its applications. Mathematics is one of the greatest of human intellectual experiences, and as such merits and requires a rather liberal approach. He takes just such an approach in this book inspired by the Hedrick Lectures of the seventy-fifth anniversary of the Mathematical Association of America. Although loosely organized around the study of a difference equation that Davis dubs Theodorus of Cyrene, the book takes us on an eclectic whirlwind tour of history, philosophy, anecdote and, of course, mathematics. Incorporating the old and the new, the proved and the conjectural, Davis examines Theodorus in light of the mathematical concerns that have grown and cha.




Spirals in Time


Book Description

The beautifully written story of shells and their makers, and our relationships with them. Seashells are the sculpted homes of a remarkable group of animals: the molluscs. These are some of the most ancient and successful animals on the planet. But watch out. Some molluscs can kill you if you eat them. Some will kill you if you stand too close. That hasn't stopped people using shells in many ways over thousands of years. They became the first jewelry and oldest currencies; they've been used as potent symbols of sex and death, prestige and war, not to mention a nutritious (and tasty) source of food. Spirals in Time is an exuberant aquatic romp, revealing amazing tales of these undersea marvels. Helen Scales leads us on a journey into their realm, as she goes in search of everything from snails that 'fly' underwater on tiny wings to octopuses accused of stealing shells and giant mussels with golden beards that were supposedly the source of Jason's golden fleece, and learns how shells have been exchanged for human lives, tapped for mind-bending drugs and inspired advances in medical technology. Weaving through these stories are the remarkable animals that build them, creatures with fascinating tales to tell, a myriad of spiralling shells following just a few simple rules of mathematics and evolution. Shells are also bellwethers of our impact on the natural world. Some species have been overfished, others poisoned by polluted seas; perhaps most worryingly of all, molluscs are expected to fall victim to ocean acidification, a side-effect of climate change that may soon cause shells to simply melt away. But rather than dwelling on what we risk losing, Spirals in Time urges you to ponder how seashells can reconnect us with nature, and heal the rift between ourselves and the living world.




Blockhead


Book Description

A biography of Leonardo Fibonacci, the 12th century mathematician who discovered the numerical sequence named for him.




Kali Natha Yoga


Book Description

the ancient art of balancing power and love through the practice of yoga, meditation and breath




A Second Coming


Book Description

A terrifying descent into madness, the first fearful steps on the path to recovery, this uncompromising memoir captures all the urgent and hypnotic tension of a commercial thriller. A Second Coming-the companion volume to Swartz's great long-poem "The Will to Christ"-is a probing investigation of the unconscious and metaphysical wellsprings of a singular poetic gift. And yet it is more. This story is without question the most accurate portrayal to date of the largely uncharted regions of schizophrenia, a compelling and solitary journey into yogic meditation and a massive abuse of cannabis non-indica. Swartz's manic delusion was the very overthrow of God and cleansing of the evolutionary process. After a twelve-day descent into terror, strapped to a hospital gurney, he emerges to an uncertain future and the realization that his whole experience was neither reality, nor, even more strangely, anything approaching fantasy.




Spiral to the Sun


Book Description




The Expanding Universe


Book Description

This book analyses, with archival evidence, the three major changes to astronomers' theories between 1900 and 1931.




Trick of the Light


Book Description

The old saying goes: 'A problem shared is a problem halved'. But what if your problem is secret? Erica, newly widowed, is devastated to discover her venture capitalist husband left their finances in ruins. Determined to save her home while protecting her teenage daughters, she vows to get back on her feet without letting them, or anyone else, know the truth. When her girls head off on a long-planned overseas adventure, Erica focuses on her much-loved job behind a makeup counter to keep her emotionally and financially afloat - although she is troubled by a peculiar encounter at work. Then she loses her job, the darkness beckons and Erica's life spirals downwards, further disturbed by strange occurrences in her house. Missing objects. Stopped clocks. Noises in the night. Should she doubt her very sanity? Can she swallow her pride and make herself reach out to her friends in time? Does she have a choice? A moving story of loss, change and self-discovery from Australia's master storyteller.




Spirals


Book Description

Spirals occur all around us and in an astounding variety. They are found as close as our own biology in the twisting of our DNA, in the construction and furnishing of our homes, in the machinery of agriculture and of heavy industry, in the oceans and forests and even in the far reaches of space.Spirals are amazingly ubiquitous.In this exploration you are invited to learn all about spirals.