Josh is the best collector on the block. And now he has something new to collect - rocks! Soon Josh and his best friend, Amy, have so many rocks they need to organize their collection. But how? Young collectors will be fascinated by all there is to know about rocks and about classifying - sorting and organizing objects by attributes like color, shape, or size. Grab your rock hammer and join the fun with this entertaining story by Stuart J. Murphy and lively art by Cat Bowman Smith.

Established by Congress in 1901, the National Bureau of Standards (NBS), now the National Institute of Standards and Technology (NIST), has a long and distinguished history as the custodian and disseminator of the United States' standards of physical measurement. Having reached its centennial anniversary, the NBS/NIST reflects on and celebrates its first century with this book describing some of its seminal contributions to science and technology. Within these pages are 102 vignettes that describe some of the Institute's classic publications. Each vignette relates the context in which the publication appeared, its impact on science, technology, and the general public, and brief details about the lives and work of the authors. The groundbreaking works depicted include: A breakthrough paper on laser-cooling of atoms below the Doppler limit, which led to the award of the 1997 Nobel Prize for Physics to William D. Phillips The official report on the development of the radio proximity fuse, one of the most important new weapons of World War II The 1932 paper reporting the discovery of deuterium in experiments that led to Harold Urey's1934 Nobel Prize for Chemistry A review of the development of the SEAC, the first digital computer to employ stored programs and the first to process images in digital form The first paper demonstrating that parity is not conserved in nuclear physics, a result that shattered a fundamental concept of theoretical physics and led to a Nobel Prize for T. D. Lee and C. Y. Yang "Observation of Bose-Einstein Condensation in a Dilute Atomic Vapor," a 1995 paper that has already opened vast new areas of research A landmark contribution to the field of protein crystallography by Wlodawer and coworkers on the use of joint x-ray and neutron diffraction to determine the structure of proteins

The book rings with the names of early inhabitants and prominent citizens. For the genealogist there is the important and wholly fortuitous list of tithables of Pittsylvania County for the year 1767, which enumerates the names of nearly 1,000 landowners and property holders, amounting in sum to a rough census of the county in its infancy. Additional lists include the names, some with inclusive dates of service, of sheriffs, justices of the peace, members of the House of Delegates, 1776-1928, members of the Senate of Virginia, 1776-1928, clerks of the court, and judges.

This book features selected papers presented at the Fourth International Conference on Nanoelectronics, Circuits and Communication Systems (NCCS 2018). Covering topics such as MEMS and nanoelectronics, wireless communications, optical communications, instrumentation, signal processing, the Internet of Things, image processing, bioengineering, green energy, hybrid vehicles, environmental science, weather forecasting, cloud computing, renewable energy, RFID, CMOS sensors, actuators, transducers, telemetry systems, embedded systems, and sensor network applications in mines, it offers a valuable resource for young scholars, researchers, and academics alike.

This series balances the need for thorough, comprehensive grammar practice with exercises and illustrations. The series is designed for beginning and intermediate level English language students. Each book contains clear grammar explanations, regular revision units and recycled grammar practice.

INTERNATIONAL BESTSELLER • With a new foreword by Tim Ferriss • “Vagabonding easily remains in my top-10 list of life-changing books. Why? Because one incredible trip, especially a long-term trip, can change your life forever. And Vagabonding teaches you how to travel (and think), not just for one trip, but for the rest of your life.”—Tim Ferriss, from the foreword There’s nothing like vagabonding: taking time off from your normal life—from six weeks to four months to two years—to discover and experience the world on your own terms. In this one-of-a-kind handbook, veteran travel writer Rolf Potts explains how anyone armed with an independent spirit can achieve the dream of extended overseas travel. Now completely revised and updated, Vagabonding is an accessible and inspiring guide to • financing your travel time • determining your destination • adjusting to life on the road • working and volunteering overseas • handling travel adversity • re-assimilating back into ordinary life Updated for our ever-changing world, Vagabonding is an indispensable guide for the modern traveler.

Guns can be very effective tools, but they are each of limited utility. There is no one weapon that is perfect for every purpose. Private persons may own a number of guns that fulfill a variety of functions. Ballistics is important for soldiers, law enforcement, sportsmen, and anyone who seeks to protect their life, their home, their family, or their workplace. If you are among these, this book is for you.Not surprisingly, gun owners and firearms enthusiasts are often part of a "social gun culture" in which certain facts, trends, and fads circulate and evolve with time, some stirring intense loyalty among shooters even when the realities suggest otherwise. For the average gun user some very popular myths, misconceptions, and miscalculations concerning ballistics and the terminal effects of bullets are strongly held, and it is not the purpose of this discussion to demonstrate why they are or are not true, only to lay out the parameters of the debate so that the readers can make their own judgments with increased confidence. The origin of ballistics is in the study of the flight path of projectiles, but its domain has been expanded in modern times. Among the modern ballistic sciences are areas of interest concerning how ammunition and weapons operate.