How did the table fork acquire a fourth tine?  What advantage does the Phillips-head screw have over its single-grooved predecessor? Why does the paper clip look the way it does? What makes Scotch tape Scotch?   In this delightful book Henry Petroski takes a microscopic look at artifacts that most of us count on but rarely contemplate, including such icons of the everyday as pins, Post-its, and fast-food "clamshell" containers.  At the same time, he offers a convincing new theory of technological innovation as a response to the perceived failures of existing products—suggesting that irritation, and not necessity, is the mother of invention.

    

    The journey promises to be a memorable one.

    When temperatures drop below 56°F, tin crumbles into powder. Were the soldiers of the Grande Armée acutee fatally weakened by cold because the buttons of their uniforms fell apart? How different our world might be if tin did not disintegrate at low temperatures and the French had continued their eastward expansion! This fascinating book tells the stories of seventeen molecules that, like the tin of those buttons, greatly influenced the course of history. These molecules provided the impetus for early exploration and made possible the ensuing voyages of discovery. They resulted in grand feats of engineering and spurred advances in medicine; lie behind changes in gender roles, in law, and in the environment; and have determined what we today eat, drink, and wear. Showing how a change as small as the position of an atom can lead to enormous differences in the properties of a substance, the authors reveal the astonishing chemical connections among seemingly unrelated events. Napoleon's Buttons offers a novel way to understand how our contemporary world works and how our civilization has been shaped over time.

    In your kitchen you denature proteins, crystallize compounds, react enzymes with substrates, and nurture desired microbial life while suppressing harmful bacteria and fungi. And unlike in a laboratory, you can eat your experiments to verify your hypotheses. In Culinary Reactions, author Simon Quellen Field turns measuring cups, stovetop burners, and mixing bowls into graduated cylinders, Bunsen burners, and beakers. How does altering the ratio of flour, sugar, yeast, salt, butter, and water affect how high bread rises? Why is whipped cream made with nitrous oxide rather than the more common carbon dioxide? And why does Hollandaise sauce call for "clarified" butter? This easy-to-follow primer even includes recipes to demonstrate the concepts being discussed, including: Whipped Creamsicle Topping—a foam; Cherry Dream Cheese—a protein gle; Lemonade with Chameleon Eggs—an acid indicator; and more!

    Suitable for undergraduate and postgraduate courses in electrical drives, this book covers topics on: Dynamics and control of electrical drives; Selection of motor power rating; DC, induction and synchronous motor drives; Stepper motor and switched reluctance motor drives; Permanent magnet ac and brushless dc motor drives; and more.

    But now the universe faced a threat more grave than mere destruction: An unnamed and utterly alien entity had somehow been released from its ancient prison and was bent on the corruption of the Well World itself. If successful, it would cause chaos beyond mortal understanding....

    All in One CHEMISTRY CBSE Class 12th

    Mass starvation, long predicted for the fast-growing population, was about to become a reality. A call went out to the world’s scientists to find a solution. This is the story of the two enormously gifted, fatally flawed men who found it: the brilliant, self-important Fritz Haber and the reclusive, alcoholic Carl Bosch. Together they discovered a way to make bread out of air, built city-sized factories, controlled world markets, and saved millions of lives. Their invention continues to feed us today; without it, more than two billion people would starve.But their epochal triumph came at a price we are still paying. The Haber-Bosch process was also used to make the gunpowder and high explosives that killed millions during the two world wars. Both men were vilified during their lives; both, disillusioned and disgraced, died tragically. Today we face the other un­intended consequences of their discovery—massive nitrogen pollution and a growing pandemic of obesity.The Alchemy of Air is the extraordinary, previously untold story of two master scientists who saved the world only to lose everything and of the unforseen results of a discovery that continues to shape our lives in the most fundamental and dramatic of ways.

    Of course, they're all dead composers, but why nitpick? Her love life is just like the musical compositions she researches--undiscovered. It's time for Maggie to let loose and go wild. In a dive bar on Bourbon Street, Maggie makes a real find in the house band's keyboard player. He's hot. Sexy. Flirtatious. Soulful. And she could swear he's playing an unknown piece she's been researching, which is impossible, unless he's dead... Centuries before he was a badass vampire with a rock-star wardrobe and Big Easy charm, Ren was Renauldo D'Antoni, a composer on the verge of great success until he was betrayed. No one could ever know that, but tonight, the shy strawberry blonde with the big eyes and obviously borrowed outfit actually seemed to recognize his long-lost composition. Now, she wants to know about the composition, and Ren wants to know her...intimately. But what starts as attraction--and distraction--just might lead to the biggest discovery of their lives...

    He moved to the then-sleepy village of Cocoa Beach, Florida, right outside Cape Canaveral, and began reporting on rockets that fizzled as often as they soared. In "Live from Cape Canaveral," Barbree, the only reporter who has covered every mission flown by astronauts, offers his unique perspective on the space program. He shares affectionate portraits of astronauts as well as some of his fellow journalists and tells some very funny behind-the-scenes stories, many involving astronaut pranks. Barbree also shows how much the space program and its press coverage have changed over time. Warm and perceptive, he reminds us just how thrilling the great moments of the space race were and why America fell in love with its heroic, sometimes larger-than-life astronauts.

    

    In fact, your body is actually endowed with many self-defense measures to hold on to fat. For example, fat can use stem cells to regenerate; increase our appetite if it feels threatened; and use bacteria, genetics, and viruses to expand itself. The secret to losing twenty pounds? You have to work with your fat, not against it. Tara explains how your fat influences your appetite and willpower, how it defends itself when attacked, and why it grows back so quickly. The Secret Life of Fat brings cutting-edge research together with historical perspectives to reveal fat’s true identity: an endocrine organ that, in the right amount, is critical to our health. Fat triggers puberty, enables our reproductive and immune systems, and even affects brain size.Although we spend $60 billion annually fighting fat, our efforts are often misinformed and misdirected. Tara expertly illustrates the complex role that genetics, hormones, diet, exercise, and history play in our weight, and The Secret Life of Fat sets you on the path to beat the bulge once and for all.

    . . . Wonderland inspires grins and well-what-d'ya-knows" —The New York Times Book Review From the New York Times-bestselling author of How We Got to Now and Where Good Ideas Come From, a look at the world-changing innovations we made while keeping ourselves entertained. This lushly illustrated history of popular entertainment takes a long-zoom approach, contending that the pursuit of novelty and wonder is a powerful driver of world-shaping technological change. Steven Johnson argues that, throughout history, the cutting edge of innovation lies wherever people are working the hardest to keep themselves and others amused.Johnson's storytelling is just as delightful as the inventions he describes, full of surprising stops along the journey from simple concepts to complex modern systems. He introduces us to the colorful innovators of leisure: the explorers, proprietors, showmen, and artists who changed the trajectory of history with their luxurious wares, exotic meals, taverns, gambling tables, and magic shows.In Wonderland, Johnson compellingly argues that observers of technological and social trends should be looking for clues in novel amusements. You'll find the future wherever people are having the most fun.

    From Egyptian wall paintings to the Venetian Renaissance, impressionism to digital images, Philip Ball tells the fascinating story of how art, chemistry, and technology have interacted throughout the ages to render the gorgeous hues we admire on our walls and in our museums.Finalist for the 2002 National Book Critics Circle Award.