Circumference - Eratosthenes and the Ancient Quest to Measure the Globe

BIOS Instant Notes in Genetics, Fourth Edition, is the perfect text for undergraduates looking for a concise introduction to the subject, or a study guide to use before examinations. Each topic begins with a summary of essential facts?an ideal revision checklist?followed by a description of the subject that focuses on core information, with clear, simple diagrams that are easy for students to understand and recall in essays and exams.

Boolean algebra, also called Boolean logic, is at the heart of the electronic circuitry in everything we use--from our computers and cars, to our kitchen gadgets and home appliances. How did a system of mathematics established in the Victorian era become the basis for such incredible technological achievements a century later? In The Logician and the Engineer, best-selling popular math writer Paul Nahin combines engaging problems and a colorful historical narrative to tell the remarkable story of how two men in different eras--mathematician and philosopher George Boole (1815-1864) and electrical engineer and pioneering information theorist Claude Shannon (1916-2001)--advanced Boolean logic and became founding fathers of the electronic communications age.

Presenting the dual biographies of Boole and Shannon, Nahin examines the history of Boole's innovative ideas, and considers how they led to Shannon's groundbreaking work on electrical relay circuits and information theory. Along the way, Nahin presents logic problems for readers to solve and talks about the contributions of such key players as Georg Cantor, Tibor Rado, and Marvin Minsky--as well as the crucial role of Alan Turing's "Turing machine"--in the development of mathematical logic and data transmission. Nahin takes readers from fundamental concepts to a deeper and more sophisticated understanding of how a modern digital machine such as the computer is constructed. Nahin also delves into the newest ideas in quantum mechanics and thermodynamics in order to explore computing's possible limitations in the twenty-first century and beyond.

The Logician and the Engineer shows how a form of mathematical logic and the innovations of two men paved the way for the digital technology of the modern world.

Could Taro, a fisherman’s son, be destined for greatness? In the course of a day, Taro’s entire life changes: His father is murdered before his eyes, and Taro is taken by a mysterious ninja on a perilous journey toward safety. Someone wants Taro dead, but who—and why? With his best friend, Hiro, and their ninja guide, Shusaku, Taro gets caught in the crossfire of a bitter conflict between rival lords for control of imperial Japan. As Taro trains to become a ninja himself, he’s less and less sure that he wants to be one. But when his real identity is revealed, it becomes impossible for Taro to turn his back on his fate.

By 1514, the reclusive cleric Nicolaus Copernicus had written and hand-copied an initial outline of his heliocentric theory-in which he defied common sense and received wisdom to place the sun, not the earth, at the center of our universe, and set the earth spinning among the other planets. Over the next two decades, Copernicus expanded his theory through hundreds of observations, while compiling in secret a book-length manuscript that tantalized mathematicians and scientists throughout Europe. For fear of ridicule, he refused to publish.

In 1539, a young German mathematician, Georg Joachim Rheticus, drawn by rumors of a revolution to rival the religious upheaval of Martin Luthers Reformation, traveled to Poland to seek out Copernicus. Two years later, the Protestant youth took leave of his aging Catholic mentor and arranged to have Copernicuss manuscript published, in 1543, as De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres)-the book that forever changed humankinds place in the universe.

In her elegant, compelling style, Dava Sobel chronicles, as nobody has, the conflicting personalities and extraordinary discoveries that shaped the Copernican Revolution. At the heart of the book is her play And the Sun Stood Still, imagining Rheticuss struggle to convince Copernicus to let his manuscript see the light of day. As she achieved with her bestsellers Longitude and Galileos Daughter, Sobel expands the bounds of narration, giving us an unforgettable portrait of scientific achievement, and of the ever-present tensions between science and faith.

A bizarre suicide leads to a scandal and then still more blood, as one of our most brilliant crime novelists reveals a world where money and sex trump everything

It's a fine day for a sail, and Victor Delahaye, one of Ireland's most successful businessmen, takes his boat far out to sea. With him is his partner's son—who becomes the sole witness when Delahaye produces a pistol, points it at his own chest, and fires.

This mysterious death immediately engages the attention of Detective Inspector Hackett, who in turn calls upon the services of his sometime partner Quirke, consultant pathologist at the Hospital of the Holy Family. The stakes are high: Delahaye's prominence in business circles means that Hackett and Quirke must proceed very carefully. Among others, they interview Mona Delahaye, the dead man's young and very beautiful wife; James and Jonas Delahaye, his identical twin sons; and Jack Clancy, his ambitious, womanizing partner. But then a second death occurs, this one even more shocking than the first, and quickly it becomes apparent that a terrible secret threatens to destroy the lives and reputations of several members of Dublin's elite.

Why did Victor Delahaye kill himself, and who is intent upon wreaking vengeance on so many of those who knew him?