It was also a land withered by drought and hunger, and a place where hope and opportunity were hard to find. But William had read about windmills in a book called Using Energy, and he dreamed of building one that would bring electricity and water to his village and change his life and the lives of those around him. His neighbors may have mocked him and called him misala—crazy—but William was determined to show them what a little grit and ingenuity could do.Enchanted by the workings of electricity as a boy, William had a goal to study science in Malawi's top boarding schools. But in 2002, his country was stricken with a famine that left his family's farm devastated and his parents destitute. Unable to pay the eighty-dollar-a-year tuition for his education, William was forced to drop out and help his family forage for food as thousands across the country starved and died.Yet William refused to let go of his dreams. With nothing more than a fistful of cornmeal in his stomach, a small pile of once-forgotten science textbooks, and an armory of curiosity and determination, he embarked on a daring plan to bring his family a set of luxuries that only two percent of Malawians could afford and what the West considers a necessity—electricity and running water. Using scrap metal, tractor parts, and bicycle halves, William forged a crude yet operable windmill, an unlikely contraption and small miracle that eventually powered four lights, complete with homemade switches and a circuit breaker made from nails and wire. A second machine turned a water pump that could battle the drought and famine that loomed with every season.Soon, news of William's magetsi a mphepo—his "electric wind"—spread beyond the borders of his home, and the boy who was once called crazy became an inspiration to those around the world.Here is the remarkable story about human inventiveness and its power to overcome crippling adversity. The Boy Who Harnessed the Wind will inspire anyone who doubts the power of one individual's ability to change his community and better the lives of those around him.

    Why is glass see-through? What makes elastic stretchy? Why does a paper clip bend? Why does any material look and behave the way it does? These are the sorts of questions that Mark Miodownik a globally-renowned materials scientist has spent his life exploring In this book he examines the materials he encounters in a typical morning, from the steel in his razor and the graphite in his pencil to the foam in his sneakers and the concrete in a nearby skyscraper.

    This is the true story of one of those girls.In 2014, Chessy Prout was a freshman at St. Paul’s School, a prestigious boarding school in New Hampshire, when a senior boy sexually assaulted her as part of a ritualized game of conquest. Chessy bravely reported her assault to the police and testified against her attacker in court. Then, in the face of unexpected backlash from her once-trusted school community, she shed her anonymity to help other survivors find their voice.This memoir is more than an account of a horrific event. It takes a magnifying glass to the institutions that turn a blind eye to such behavior and a society that blames victims rather than perpetrators. Chessy’s story offers real, powerful solutions to upend rape culture as we know it today. Prepare to be inspired by this remarkable young woman and her story of survival, advocacy, and hope in the face of unspeakable trauma.

    Unlikely Friendships tells one story after another of animals who, with nothing else in common, bond in the most unexpected ways and thrive on the warmth, closeness, and trust that come with being true friends.Imagine a predator cuddling its prey. Or a bird befriending a mammal. Or a fish poking its nose out of the water to nuzzle a dog. Or a massive gorilla - the one named Koko, famous for her ability to communicate in sign language - embracing a tiny kitten.Science writer Jennifer S. Holland narrates each story, and also offers insights into these relationships. Sometimes there are plausible scientific explanations: an orphan seeking comfort from an older animal; an adult yearning for a younger creature to nurture. Consider the lioness who befriended and protected a baby oryx - unexpected, but not inexplicable. Sometimes a friendship is about need, as in the case of the blind Lab and her "seeing-eye" cat. B ut sometimes it's just a lovely mystery. How else can one explain the story of Owen the hippo and Mzee the tortoise, two notoriously surly creatures who became bosom buddies?Each story reveals the true power of friendship and, to some degree, the many forms of "love" that seem to exist in the animal kingdom. Yes, scientists might scoff at that notion, but readers may feel a little differently about the world after they finish this book.

    As he did in his bestselling Scholastic YA book, CHASING LINCOLN'S KILLER, Swanson will deploy his signature "you are there" style -- a riveting, ticking-clock pace, with an unprecedented eye for dramatic details and impeccable historical accuracy -- to tell the story of the JFK assassination as it has never been told before.

    Problems are designed to progressively enhance MATLAB-use proficiency, so students need not be familiar with MATLAB at the start of your course. Program scripts that are answers to exercises in the text are available at no charge in electronic form (see Teaching Resources below). *Supplement and Review Mini-Chapters after each of the text's three parts contain an extensive review list of terms, test-like problem sets with answers, and detailed suggestions on supplemental reading to reinforce students' learning and help them prepare for exams. *Read-Only Chapters, strategically placed to provide a change of pace during the course, provide informative, yet enjoyable reading for students. *Measurement Details and Results samples offer students a realistic perspective on the seldom-perfect nature of device characteristics, contrary to the way they are often represented in introductory texts. Content Highlig

    We often overlook the historical link between mathematics and technological advances, says Stewart—but this connection is integral to any complete understanding of human history.Equations are modeled on the patterns we find in the world around us, says Stewart, and it is through equations that we are able to make sense of, and in turn influence, our world. Stewart locates the origins of each equation he presents—from Pythagoras's Theorem to Newton's Law of Gravity to Einstein's Theory of Relativity—within a particular historical moment, elucidating the development of mathematical and philosophical thought necessary for each equation's discovery. None of these equations emerged in a vacuum, Stewart shows; each drew, in some way, on past equations and the thinking of the day. In turn, all of these equations paved the way for major developments in mathematics, science, philosophy, and technology. Without logarithms (invented in the early 17th century by John Napier and improved by Henry Briggs), scientists would not have been able to calculate the movement of the planets, and mathematicians would not have been able to develop fractal geometry. The Wave Equation is one of the most important equations in physics, and is crucial for engineers studying the vibrations in vehicles and the response of buildings to earthquakes. And the equation at the heart of Information Theory, devised by Claude Shannon, is the basis of digital communication today.An approachable and informative guide to the equations upon which nearly every aspect of scientific and mathematical understanding depends, In Pursuit of the Unknown is also a reminder that equations have profoundly influenced our thinking and continue to make possible many of the advances that we take for granted.

    Its 20,000 inhabitants lived in the shadow of Vesuvius, which they believed was nothing more than a mountain. But Vesuvius was a volcano. And on the morning of August 24, A.D. 79, Vesuvius began to erupt. Within twenty-four hours, the entire city of Pompeii—and many of its citizens—had been utterly annihilated.It was not until hundreds of years later that Pompeii saw daylight again, as archaeological excavations began to unearth what had been buried under layers of volcanic rubble. Digging crews expected to find buildings and jewelry and other treasures, but they found something unexpected, too: the imprints of lost Pompeiians, their deaths captured as if by photographic images in volcanic ash.

    When the great blizzard of 1888 crippled the entire northeast, a solution had to be found. Two brothers from one of the nation's great families-Henry Melville Whitney of Boston and William Collins Whitney of New York-pursued the dream of his city digging America's first subway, and the great race was on. The competition between Boston and New York played out in an era not unlike our own, one of economic upheaval, life-changing innovations, class warfare, bitter political tensions, and the question of America's place in the world.The Race Underground is peopled with the famous, like Boss Tweed, Grover Cleveland and Thomas Edison, and the not-so-famous, from brilliant engineers to the countless "sandhogs" who shoveled, hoisted and blasted their way into the earth's crust, sometimes losing their lives in the construction of the tunnels. Doug Most chronicles the science of the subway, looks at the centuries of fears people overcame about traveling underground and tells a story as exciting as any ever ripped from the pages of U.S. history. The Race Underground is a great American saga of two rival American cities, their rich, powerful and sometimes corrupt interests, and an invention that changed the lives of millions.

    You'll learn how to construct houses, bridges, ships, floating islands and rollercoasters of the highest quality.

    Everyone else knows what's happening and I look around and say, Duh."Of course, the truth is that no one has the script because there is no script to follow. Chances are you'd find that almost everyone else has questions and worries a lot like yours, if you could get them to admit it. This brand-new, completely updated and revised edition of Changing Bodies, Changing Lives is full of honest, accurate, nonjudgmental information on everything teenagers need to know about today.Am I the only one whocan't get up the nerve to ask someone out?got my period so early?doesn't even know the right way to kiss?feels pressured to use drugs?still hasn't hit puberty yet?wants to avoid the gang scene?worries when my mom doesn't come home at night?is scared that I might have AIDS?can't decide what form of birth control to use?has no idea how to tell my friends I'm gay?goes on eating binges?has never had an orgasm?is shut out of the popular crowd?Changing Bodies, Changing Lives has helped hundreds of thousands of teenagers make informed decisions about their lives, from questions about sex, love, friendship, and how your body works to dealing with problems at school and home and figuring out who you are. It's packed with illustrations, checklists, and resources for the answers you really need. Best of all, it's filled with the voices, poems, and cartoons from hundreds of other teenagers, who tell you what makes them feel worried, angry, confused, sexy, happy, and, yes, even excited and hopeful about their lives. (Check out the first two pages for a sample of the quotes you'll find inside.)Being a teenager is tough. With the information and the ideas inside this book, you'll have what you need to make these years the best they can be.

    Stine turned being the "funny guy" into the best defense against the bullies in his class.Today's top authors for teens come together to share their stories about bullying—as silent observers on the sidelines of high school, as victims, and as perpetrators—in a collection at turns moving and self-effacing, but always deeply personal.

    Whenyou upgrade to Extra Class, you gain access to the entire Amateur Radio frequency spectrum. Ues this book to ace the top-level ham radio licensing exam. Our expert instruction will lead you through all of the knowledge you need to pass the exam: rules, specific operating skills and more advanced electronics theory.

    Written for 11- to 15-year-olds and assuming no prior computing knowledge, this book uses the wildly successful, low-cost, credit-card-sized Raspberry Pi computer to explain fundamental computing concepts. Young people will enjoy going through the book's nine fun projects while they learn basic programming and system administration skills, starting with the very basics of how to plug in the board and turn it on. Each project includes a lively and informative video to reinforce the lessons. It's perfect for young, eager self-learners—your kids can jump in, set up their Raspberry Pi, and go through the lessons on their own. Written by Carrie Anne Philbin, a high school teacher of computing who advises the U.K. government on the revised ICT Curriculum Teaches 11- to 15-year-olds programming and system administration skills using Raspberry Pi Features 9 fun projects accompanied by lively and helpful videos Raspberry Pi is a $35/£25 credit-card-sized computer created by the non-profit Raspberry Pi Foundation; over a million have been sold Help your children have fun and learn computing skills at the same time with Adventures in Raspberry Pi.

    Python is considered easy to learn, but there's no quicker way to mastery of the language than learning from an expert teacher. This edition of "Learning Python" puts you in the hands of two expert teachers, Mark Lutz and David Ascher, whose friendly, well-structured prose has guided many a programmer to proficiency with the language. "Learning Python," Second Edition, offers programmers a comprehensive learning tool for Python and object-oriented programming. Thoroughly updated for the numerous language and class presentation changes that have taken place since the release of the first edition in 1999, this guide introduces the basic elements of the latest release of Python 2.3 and covers new features, such as list comprehensions, nested scopes, and iterators/generators. Beyond language features, this edition of "Learning Python" also includes new context for less-experienced programmers, including fresh overviews of object-oriented programming and dynamic typing, new discussions of program launch and configuration options, new coverage of documentation sources, and more. There are also new use cases throughout to make the application of language features more concrete. The first part of "Learning Python" gives programmers all the information they'll need to understand and construct programs in the Python language, including types, operators, statements, classes, functions, modules and exceptions. The authors then present more advanced material, showing how Python performs common tasks by offering real applications and the libraries available for those applications. Each chapter ends with a series of exercises that will test your Python skills and measure your understanding."Learning Python," Second Edition is a self-paced book that allows readers to focus on the core Python language in depth. As you work through the book, you'll gain a deep and complete understanding of the Python language that will help you to understand the larger application-level examples that you'll encounter on your own. If you're interested in learning Python--and want to do so quickly and efficiently--then "Learning Python," Second Edition is your best choice.