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From New York Times bestselling author Sam Kean comes incredible stories of science, history, finance, mythology, the arts, medicine, and more, as told by the Periodic Table. Why did Gandhi hate iodine (I, 53)? How did radium (Ra, 88) nearly ruin Marie Curie's reputation? And why is gallium (Ga, 31) the go-to element for laboratory pranksters? The Periodic Table is a crowning scientific achievement, but it's also a treasure trove of adventure, betrayal, and obsession. These fascinating tales follow every element on the table as they play out their parts in human history, and in the lives of the (frequently) mad scientists who discovered them. The Disappearing Spoon masterfully fuses science with the classic lore of invention, investigation, and discovery -- from the Big Bang through the end of time. Though solid at room temperature, gallium is a moldable metal that melts at 84 degrees Fahrenheit. A classic science prank is to mold gallium spoons, serve them with tea, and watch guests recoil as their utensils disappear.
This book offers a highly accessible introduction to natural language processing, the field that supports a variety of language technologies, from predictive text and email filtering to automatic summarization and translation. With it, you'll learn how to write Python programs that work with large collections of unstructured text. You'll access richly annotated datasets using a comprehensive range of linguistic data structures, and you'll understand the main algorithms for analyzing the content and structure of written communication. Packed with examples and exercises, Natural Language Processing with Python will help you: Extract information from unstructured text, either to guess the topic or identify "named entities" Analyze linguistic structure in text, including parsing and semantic analysis Access popular linguistic databases, including WordNet and treebanks Integrate techniques drawn from fields as diverse as linguistics and artificial intelligence This book will help you gain practical skills in natural language processing using the Python programming language and the Natural Language Toolkit (NLTK) open source library. If you're interested in developing web applications, analyzing multilingual news sources, or documenting endangered languages -- or if you're simply curious to have a programmer's perspective on how human language works -- you'll find Natural Language Processing with Python both fascinating and immensely useful.
Advanced energetic materialsâ€"explosive fill and propellantsâ€"are a critical technology for national security. While several new promising concepts and formulations have emerged in recent years, the Department of Defense is concerned about the nation's ability to maintain and improve the knowledge base in this area. To assist in addressing these concerns, two offices within DOD asked the NRC to investigate and assess the scope and health of the U.S. R&D efforts in energetic materials. This report provides that assessment. It presents several findings about the current R&D effort and recommendations aimed at improving U.S. capabilities in developing new energetic materials technology. This study reviewed U.S. research and development in advanced energetics being conducted by DoD, the DoE national laboratories, industries, and academia, from a list provided by the sponsors. It also: (a) reviewed papers and technology assessments of non-U.S. work in advanced energetics, assessed important parameters, such as validity, viability, and the likelihood that each of these materials can be produced in quantity; (b) identified barriers to scale-up and production, and suggested technical approaches for addressing potential problems; and (c) suggested specific opportunities, strategies, and priorities for government sponsorship of technologies and manufacturing process development.
Presents a selection of the research presented at the 50th Annual Meeting of the College Reading Association in Pittsburgh, Pa., Oct. 2006.
This book tells the intriguing and often colorful stories of the medical words we use. The origins of clinical and scientific terms can be found in Greek and Latin myths, in places such as jungles of Uganda and the islands of the Aegean Sea, in the names of medicine’s giants such as Hippocrates and Osler, and in some truly unlikely sources. In this book you will learn the answers to questions such as: • What disease was named for an American space flight? • Do you know the echoic word for elephantine rumbling of the bowels? • What drug name was determined by drawing chemists’ notes out of a hat? • What are surfer’s eye, clam digger’s itch, and hide porter’s disease? This book can give you new insights into the terms we use every day in the clinic, hospital, and laboratory. Knowing a word’s history assists in understanding not only what it means, but also some of the connotative subtleties of terms used in diagnosis and treatment. The Amazing Language of Medicine is intended for the enrichment of physicians, other health professionals, students, and anyone involved in clinical care and medical science.
Martin Gardner's Mathematical Games columns in Scientific American inspired and entertained several generations of mathematicians and scientists. Gardner in his crystal-clear prose illuminated corners of mathematics, especially recreational mathematics, that most people had no idea existed. His playful spirit and inquisitive nature invite the reader into an exploration of beautiful mathematical ideas along with him. These columns were both a revelation and a gift when he wrote them; no one--before Gardner--had written about mathematics like this. They continue to be a marvel. This is the original 1986 edition and contains columns published from 1972-1974.
Revised and expanded to reflect new developments in the field, this book outlines the basic principles required to understand the chemical processes of explosives. The Chemistry of Explosives provides an overview of the history of explosives, taking the reader to future developments. The text on the classification of explosive materials contains much data on the physical parameters of primary and secondary explosives. The explosive processes of deflagration and detonation, including the theory of ‘hotspots’ for the detonation process, are introduced and many examples are provided in the detailed description on the thermochemistry of explosives. New material includes coverage of the latest explosive compositions, such as high temperature explosives, nitrocubanes, energetic polymers, plasticizers and insensitive munitions (IM). This concise, readable book is ideal for students and new graduates with no previous knowledge of explosive materials. With detailed information on a vast range of explosives in tabular form and an extensive bibliography, this book will also be useful to anyone needing succinct information on the subject.
The first four books featuring the world’s most beloved nanny, plus delightful bonus features! Since the 1934 publication of Mary Poppins, stories of this magical nanny have delighted children and adults for generations. This collection includes the first four tales by P. L. Travers, illustrated by Mary Shepard: Mary Poppins, Mary Poppins Comes Back, Mary Poppins Opens the Door, and Mary Poppins in the Park. Also including a foreword by Gregory Maguire, author of Wicked, who explores the significant differences between the book and movie versions, and an essay by P. L. Travers about the writing of Mary Poppins, this collection lets you travel with Mary on the east wind to Cherry Tree Lane in these stories that inspired films, a stage show, and young imaginations the world over. “When Mary Poppins is about, her young charges can never tell where the real world merges into make-believe. Neither can the reader, and that is one of the hallmarks of good fantasy.” —The New York Times
Questioning Geography introduces students to the fundamental debates that animate geography today. Each of the chapters focuses on a key issue that has divided or galvanised geographers in their work. Covers both human and physical geography. Includes essay questions and suggestions for further reading. Demonstrates to students the distinctiveness and vitality of modern geography.