Smoking has gone from doctor recommended to deadly. We used to think the Earth was the center of the universe and that Pluto was a planet. For decades, we were convinced that the brontosaurus was a real dinosaur. In short, what we know about the world is constantly changing.   But it turns out there’s an order to the state of knowledge, an explanation for how we know what we know. Samuel Arbesman is an expert in the field of scientometrics—literally the science of science. Knowl­edge in most fields evolves systematically and predict­ably, and this evolution unfolds in a fascinating way that can have a powerful impact on our lives.   Doctors with a rough idea of when their knowl­edge is likely to expire can be better equipped to keep up with the latest research. Companies and govern­ments that understand how long new discoveries take to develop can improve decisions about allocating resources. And by tracing how and when language changes, each of us can better bridge gen­erational gaps in slang and dialect.   Just as we know that a chunk of uranium can break down in a measurable amount of time—a radioactive half-life—so too any given field’s change in knowledge can be measured concretely. We can know when facts in aggregate are obsolete, the rate at which new facts are created, and even how facts spread.   Arbesman takes us through a wide variety of fields, including those that change quickly, over the course of a few years, or over the span of centuries. He shows that much of what we know consists of “mesofacts”—facts that change at a middle timescale, often over a single human lifetime. Throughout, he of­fers intriguing examples about the face of knowledge: what English majors can learn from a statistical analysis of The Canterbury Tales, why it’s so hard to measure a mountain, and why so many parents still tell kids to eat their spinach because it’s rich in iron.   The Half-life of Facts is a riveting journey into the counterintuitive fabric of knowledge. It can help us find new ways to measure the world while accepting the limits of how much we can know with certainty.

    Mastering the fat hormone leptin is the single most important factor in preventing obesity, diabetes, and heart disease. The Leptin Diet contains five simple lifestyle guidelines to get the hormone leptin into balance for permanent weight loss, increased energy, and optimum health. What is Leptin? Fat cells produce the powerful hormone leptin, a primary force instructing metabolism, weight loss, and hormone balance. Leptin communicates directly to your brain, telling the brain how much fat is in storage. It controls appetite, energy, and metabolic rate. Leptin problems are the primary reason for food cravings, overeating, faulty metabolism, the obsession with food, and heart disease. Read The Leptin Diet and notice the difference!

    In this innovative book, Paul Spencer Sochaczewski explores why he collects Ganesha images, examines the psychology of collecting, and recounts personal adventures in his 40-year quest for just one more (but it’s gotta be special) Ganesha statue. He provides enough iconography to give the reader a grounding in Ganesha’s obstacle-removing prowess, but this is neither an academic nor a religious tome. Museum-quality photographs of some 80 statues, carvings, and amulets from his 150-piece collection illustrate how Hindu public relations experts retrofitted Ganesha into the Mahabharata, under what circumstances benevolent Ganesha can be an aggressive crusader, why he loves sweets, what inspiration Hindu branding experts took from nature, and why his “vehicle” is a humble mouse. Why does Sochaczewski appreciate (but not worship) the god? “Ganesha isn’t a stern, don’t-touch-my-hair super-god, and therefore artists can flex their creative muscles when portraying him,” he says. “And simply because he’s cool.”

    It might just be that what you have is actually not what you need to feel fulfilled.And you’re not the only one going through this.Despite having one of the highest standards of living in the world, the level of happiness among Americans is at its lowest. In fact, it has been declining for the past 20 years.Social media, reliance on drugs, and the endless pursuit of wealth are just some of the reasons for this phenomenon. We are constantly bombarded with messages and images of how life should look like, and we try to reach this aspirational goal through any means necessary.We can chase it through traveling, buying expensive things, achieving career success, or even getting married and starting a family. But why do you still feel unsatisfied, even after you have all this?What is it that makes us truly happy?Plenty of scientific research has been done to find the answer to this question. There is also a lot of advice from self-help books and motivational speakers on being happy.Thankfully, you don’t have to go through all the studies and TED talks online to find the key to happiness.In The Happiness Power: How to Unleash Your Power and Live a Joyful Life, you will discover:- Why your present circumstances don’t have to determine your level of happiness, and how you can take your well-being into your own hands- The #1 factor that helps us live longer, healthier, and happier lives, according to a decades-long Harvard study on adult life- How to have a more positive mindset through this daily habit that Oprah Winfrey believes has rewarded her a million times over- How you can combat loneliness with these friendly suggestions on how to build and strengthen your social circle- The secret to happiness that the Japanese have known and practiced for centuries, contributing to their high levels of satisfaction and long life spans- Effortless mindfulness tricks to apply throughout the day that will help you get through stressful days and pessimistic emotions- The simple generous act that has the same positive effects as food and sex, offering satisfaction not only to you, but also to your recipientAnd much more.Although happiness is not the be-all and end-all of life, it sure doesn’t hurt to go through life being happy rather than dissatisfied and lonely.Our lives weren’t meant to be lived in constant pursuit of an abstract vision of happiness. Chasing after happiness will only make it so much harder to obtain.It is when you are focused on genuinely living a life of truth, purpose, and meaning, that happiness will come to you.Find out what it takes to live a life that’s true to your values and your innermost needs.

    No one wants to add to the scrap heap. But if you restrict yourself to only reading articles from people who have actually created a business, hit some revenue target, or broken out of the MVP-in-an-incubator stage, there’s very few books and blogs left. This is why we hope this book is relevant to you.It’s not packed with startup clichés, nor is it steeped in myths about how huge companies got their break. Yes, Airbnb sold cereal before they were a 31 billion dollar company, and Slack was one hell of a pivot, but those wells have been over-drilled for their useful lessons at this point. This book is our honest, opinionated take on what we’ve learned building Intercom over the past 6 years. You won’t like it all, you won’t agree with it all, but you’re not supposed to. Your mileage will vary.

    

    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.

    Reveals how to run an online business profitably in spite of the Internet's inherently free culture, disseminating the principles of a ''priceless economy'' in six categories that pertain to advertising, labor exchange, and advanced-version fees.

    This book shows you how to claim your share. Over 200 pages of valuable metal detecting information designed to get you out there finding treasure on your very first outing.Finding treasure with a metal detector is real and doing it is simple and easy once you read this book. There are people finding incredible old coins made from gold and silver, valuable historical relics and old jewelry made from gold, silver and platinum. But you won't find these great treasures unless you know where and how to look. Metal Detecting: A Beginner's Guide shows you this and much more.Veteran detectorist and treasure enthusiast Mark Smith continues to provide great information to anyone interested in the great hobby of metal detecting. In his second book on the subject, he manages to answer the common questions that every novice has when they are thinking about getting started. From choosing the right machine to identifying your valuable treasure, Mark Smith covers these subjects and everything in between in an easy to understand way.While this metal detecting book may be geared towards the novice treasure hunter, there are plenty of choice tips that even experienced treasure hunters can pick up. Mark Smith reveals some of his best guarded metal detecting secrets in this metal detecting guide that puts more treasure in your find's pouch.Fully illustrated diagrams and real life pictures describe in detail the easiest ways to not only locate treasure, but safely recover it as well.Learn how to find more treasure by: understanding common metal detecting terminology, understanding which metal detectors work the best and where, understanding how and why a metal detector works, other equipment you will need, proper etiquette, what you can expect to find, why you should never throw anything away, how to identify your finds, how to identify jewelry, how to tell if it is real gold, how to metal detect with children, which recovery tools work the best, how to recover treasure, how to metal detect private property, how to identify unknown metal detecting finds, metal detecting creeks, rivers and lakes, pinpointing, making weak targets stronger, cleaning your finds, the best places to use your metal detector, selling your finds and more!What are you waiting for? Find out how you can maximize your treasure with this informative metal detecting book today.

    On the other hand, post-Apartheid dreams of progress and reform have, in part, collapsed into a morass of corruption, unemployment and criminal violence.A Short History of South Africa is a brief, general account of the history of this most complicated and fascinating country – from the first evidence of hominid existence to the wars of the 18th, 19th and 20th centuries that led to the establishment of modern South Africa, the horrors of Apartheid and the optimism following its collapse, as well as the prospects and challenges for the future.This readable and thorough account, illustrated with maps and photographs, is the culmination of a lifetime of researching and teaching the broad spectrum of South African history.Nattrass’s passion for her subject shines through, whether she is elucidating the reader on early humans in the cradle of humankind, or describing the tumultuous twentieth-century processes that shaped the democracy that is South Africa today.

    Irene Izak, a young French teacher from Scranton, Pennsylvania, was headed toward a new job and the promise of a new life in Quebec. She never reached the border that early June morning. Savagely bludgeoned—her face and head pummeled with rocks—Irene’s body was discovered in a ravine by a state trooper patrolling Route 81 in Jefferson County, New York. Blending suspense with true-crime reporting, author Dave Shampine investigates the brutal murder that shook the communities of northeast Pennsylvania and New York’s North Country. Join Shampine as he tells the story of this vicious and confounding killing that has remained unsolved for four decades.

    It focuses on critical analysis of the subject through a workbook section and self-quizzes along with prompts to explore the chapter's images and topics through the ArtStudy 2.0 CD-ROM, Web Site, and WebTutor? supplements.

    It is an insight into their initiation ceremonies, their methods, their money-raising tactics; a timely portrayal of Britain's worst criminal problem.

    It is a book I recommend." --Scott Guthrie, Corporate Vice President, .NET Developer Platform, Microsoft Corporation "A must-read for a concise but thorough examination of the parallel programming features in the .NET Framework 4." --Stephen Toub, Parallel Computing Platform Program Manager, Microsoft "This wonderful book is a great reference for developers of all levels." -- Chris Burrows, C# Compiler Team, Microsoft When you have questions about how to use C# 4.0 or the .NET CLR, this highly acclaimed bestseller has precisely the answers you need. Uniquely organized around concepts and use cases, this fourth edition includes in-depth coverage of new C# topics such as parallel programming, code contracts, dynamic programming, security, and COM interoperability. You'll also find updated information on LINQ, including examples that work with both LINQ to SQL and Entity Framework. This book has all the essential details to keep you on track with C# 4.0. Get up to speed on C# language basics, including syntax, types, and variables Explore advanced topics such as unsafe code and preprocessor directives Learn C# 4.0 features such as dynamic binding, type parameter variance, and optional and named parameters Work with .NET 4's rich set of features for parallel programming, code contracts, and the code security model Learn .NET topics, including XML, collections, I/O and networking, memory management, reflection, attributes, security, and native interoperability

    Based on the ubiquitous Java, it provides an alternative to daunting languages and expensive proprietary software.This book gives graphic designers, artists and illustrators of all stripes a jump start to working with processing by providing detailed information on the basic principles of programming with the language, followed by careful, step-by-step explanations of select advanced techniques.The author teaches computer graphics at NYU's Tisch School of the Arts, and his book has been developed with a supportive learning experience at its core. From algorithms and data mining to rendering and debugging, it teaches object-oriented programming from the ground up within the fascinating context of interactive visual media.Previously announced as Pixels, Patterns, and Processing