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Programmable Logic Controllers
Useful for an undergraduate-level course on PLCs or Electronic Controls, this book provides coverage on programmable logic controllers. It discusses applications for each PLC function, and includes an array of examples and problems that help students achieve an understanding of PLCs.
Christopher Columbus and the Age of Exploration for Kids
An NCSS Notable Social Studies Trade Book for Young People Christopher Columbus is one of the most famous people in world history, yet few know the full story of the amazing, resourceful, and tragic Italian explorer. Christopher Columbus and the Age of Exploration for Kids portrays the "Admiral of the Ocean Seas" neither as hero nor heel but as a flawed and complex man whose significance is undeniably monumental. Kids will gain a fuller picture of the seafarer's life, his impact, and the dangers and thrills of exploration as they learn about all four of Columbus's voyages to the New World, not just his first, as well as the year that Columbus spent stranded on the island of Jamaica without h...
The Dust Bowl, Updated Edition
Housewives hung wet sheets and blankets over windows, struggling to seal every crack with gummed paper strips. A man avoided shaking hands, lest the static electricity gathered from a dust storm knock his greeter flat. Children's tears turned to mud. Horses chewed feed filled with dust particles that sandpapered their gums raw. Dead cattle, when pried open, were filled with pounds of gut-clogging dirt. The simplest thing in life, taking a breath, became life-threatening. The Dust Bowl conditions during the "Dirty Thirties" were no blind stroke of nature, but had their origins in human error and in the misuse of the land. The Dust Bowl, Updated Edition recounts the factors that led to the Dust Bowl conditions, how those affected coped, and what can be learned from the tragedy, considered by many to be America's worst prolonged environmental disaster.
The Empire State Building
It was to be a structure like no other: the largest and tallest skyscraper in the world. Initial plans for the Empire State Building called for an Art Deco masterwork to rise 1,000 feet, with 80 stories of rental space. The high-rise was to completely fill the 84,000-square-foot site of the former Waldorf-Astoria, then New Yorks most opulent hotel. Hopes were high that the Empire State Building would accelerate Midtown Manhattans stride toward commercial prominence, pulling more business uptown. Built in the early years of the Great Depression, during which one out of four New Yorkers was out of work, the Empire State Buildings construction was thought by many to be a foolish undertaking. Yet, it was completed under budget and ahead of schedule, and the commercial colossus has stood through good times and bad as a symbol of daring, beauty, and American invention.
Becoming an Electronics Technician
Describes the role of an electronics technician and explains how to prepare to become one. This guide offers a complete discussion of the study skills necessary to succeed in the profession, and shows how to secure a first job as an electronics technician.
The US Congress for Kids
An interactive guidebook to the history and inner workings of the legislative branch of the U.S. Government Providing a historical perspective on all that is going on today, US Congress for Kids examines the major milestones in congressional history, including the abolition of slavery, extending the vote to African Americans and to women, and investigating misconduct in both government and private institutions. Kids will be engaged by the focus on dramatic stories, personalities, and turning points while also benefitting from the clear discussions of Congressional purpose, structure, history, and ongoing issues. Educational, hands-on activities that illuminate the workings of the U.S. Congress include making a House ceremonial mace, creating congressional money, making a capitol dome, and designing a Congressional Medal of Honor.
Henry Ford for Kids
Henry Ford for Kids provides an in-depth portrait of the man who "put America on wheels." You'll learn about Ford's childhood on a Michigan farm, where the budding engineer loved to take apart and reassamble everything from toys to watches to machinery; about his revolutionary labor ideas, including paying higher wages and hiring women and the disabled at a time when many companies would not; about his fervent opposition to war and the lasting impact of his widespread philanthropy. But you'll also learn that this automotive giant was a flawed individual whose controversial views and heavy-handed management style alienated many, yet whose engineering genius and impact on the world are undeniable. Packed with historic photos and illuminating sidebars, the book brings the turn of the 20th century to life. Twenty-one hands-on activities encourage young innovators to apply engineering and production ideas and learn more about the era. Kids will build a lemon-powered battery; form an assembly line; learn to "read" simple industrial drawings; design an automobile dashboard; learn to dance the waltz; and much more.
The New York City Subway System
Teeming with a population of 3.5 million at the end of the 19th century, the island of Manhattan couldn't meet the city's demand for rapid transit with its horse-drawn trolleys and elevated train lines. New York City needed a subway system. After four years of digging and diverting miles of utilities and tunneling under the Harlem River, the city's residents celebrated a new era in mass transit on October 27, 1904, with the opening of a nine-mile subway route. In the century to come, the New York subway would grow and expand to a system that runs 24 hours a day, seven days a week, with 6,400 cars, 468 stations, a daily ridership of 4.5 million, and 842 miles of track - longer than the distance from New York to Chicago. Politics, graffiti, and unbelievable construction challenges combined to make the building and running of the New York subway system one of the America's greatest civic undertakings.
PLC Controls with Structured Text (ST)
This book gives an introduction to Structured Text (ST), used in Programmable Logic Control (PLC). The book can be used for all types of PLC brands including Siemens Structured Control Language (SCL) and Programmable Automation Controllers (PAC). Contents: - Background, advantage and challenge when ST programming - Syntax and fundamental ST programming - Widespread guide to reasonable naming of variables - CTU, TOF, TON, CASE, STRUCT, ENUM, ARRAY, STRING - Guide to split-up into program modules and functions - More than 90 PLC code examples in black/white - FIFO, RND, 3D ARRAY and digital filter - Examples: From LADDER to ST programming - Guide to solve programming exercises Many clarifying ...
Tomorrow's Table
By the year 2050, Earth's population will double. If we continue with current farming practices, vast amounts of wilderness will be lost, millions of birds and billions of insects will die, and the public will lose billions of dollars as a consequence of environmental degradation. Clearly, there must be a better way to meet the need for increased food production. Written as part memoir, part instruction, and part contemplation, Tomorrow's Table argues that a judicious blend of two important strands of agriculture--genetic engineering and organic farming--is key to helping feed the world's growing population in an ecologically balanced manner. Pamela Ronald, a geneticist, and her husband, Rao...
