Class-tested and coherent, this textbook teaches classical and web information retrieval, including web search and the related areas of text classification and text clustering from basic concepts. It gives an up-to-date treatment of all aspects of the design and implementation of systems for gathering, indexing, and searching documents; methods for evaluating systems; and an introduction to the use of machine learning methods on text collections. All the important ideas are explained using examples and figures, making it perfect for introductory courses in information retrieval for advanced undergraduates and graduate students in computer science. Based on feedback from extensive classroom experience, the book has been carefully structured in order to make teaching more natural and effective. Slides and additional exercises (with solutions for lecturers) are also available through the book's supporting website to help course instructors prepare their lectures.

A career-spanning anthology of essays on politics and culture by the best-selling author of The Flamethrowers includes entries discussing a Palestinian refugee camp, an illegal Baja Peninsula motorcycle race, and the 1970s Fiat factory wildcat strikes.

Mountain Bike Maintenance is a complete guide to keeping your bike healthy. Every area of bike maintenance and repair is covered, using step-by-step photos and accompanying text, to create an easy-to-understand manual that will prove invaluable to any mountain bike enthusiast. The book is broken down into each mechanical area of the bike, providing assistance, tips and trouble-shooting ideas for every problem that may arise. The book covers the simple to the more complex, from the tools needed to emergency off-road repair, from over-hauling troublesome pedals to wheel building. Whatever the symptom, Mountain Bike Maintenance provides the solution to the problem, aided by 'how-to' sequences that provide visual direction to the task at hand.

Fully and fearlessly updated, this vital new edition of the acclaimed book on sex, sexuality, bodies, and puberty deserves a spot in every family’s library. With more than 1.5 million copies in print, It’s Perfectly Normal has been a trusted resource on sexuality for more than twenty-five years. Rigorously vetted by experts, this is the most ambitiously updated edition yet, featuring to-the-minute information and language accompanied by new and refreshed art. Updates include: * A shift to gender-neutral vocabulary throughout * An expansion on LGBTQIA topics, gender identity, sex, and sexuality—making this a sexual health book for all readers * Coverage of recent advances in methods of sexual safety and contraception with corresponding illustrations * A revised section on abortion, including developments in the shifting politics and legislation as well as an accurate, honest overview * A sensitive and detailed expansion on the topics of sexual abuse, the importance of consent, and destigmatizing HIV/AIDS * A modern understanding of social media and the internet that tackles rapidly changing technology to highlight its benefits and pitfalls and ways to stay safe online Inclusive and accessible, this newest edition of It’s Perfectly Normal provides young people with the knowledge and vocabulary they need to understand their bodies, relationships, and identities in order to make responsible decisions and stay healthy.

Still unparalleled for its friendly tone, easy-to-follow instructions, and fun funky illustrations. A Ten Speed Classic! From the Hardcover edition.