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Have you ever wondered how stealth planes achieve "invisibility," how sunken ships are found, or how fishermen track schools of fish in vast expanses of ocean? Radar and sonar echolocation—a simple matter of sending, receiving, and processing signals. Weaving history with simple science, Mark Denny deftly reveals the world of radar and sonar to the curious reader, technology buff, and expert alike. He begins with an early history of the Chain Home radar system used during World War II and then provides accessible and engaging explanations of the physics that make signal processing possible. Basic diagrams and formulas show how electromagnetic and sound waves are transmitted, received, and converted into images, allowing you to literally see in the dark. A section on bioacoustic echolocation, with a focus on the superior sonar systems of bats and whales and a discussion of the advanced technology of next-generation airborne signal processors, opens the imagination to fascinating possibilities for the future.
Have you ever wondered how stealth planes achieve "invisibility," how sunken ships are found, or how fishermen track schools of fish in vast expanses of ocean? Radar and sonar echolocation—a simple matter of sending, receiving, and processing signals. Weaving history with simple science, Mark Denny deftly reveals the world of radar and sonar to the curious reader, technology buff, and expert alike. He begins with an early history of the Chain Home radar system used during World War II and then provides accessible and engaging explanations of the physics that make signal processing possible. Basic diagrams and formulas show how electromagnetic and sound waves are transmitted, received, and converted into images, allowing you to literally see in the dark. A section on bioacoustic echolocation, with a focus on the superior sonar systems of bats and whales and a discussion of the advanced technology of next-generation airborne signal processors, opens the imagination to fascinating possibilities for the future.
Max and Oscar are given a pet ID microchip to identify. A rice-sized electronic device, Max has never seen anything quite like it. Using an ancient library book scanner, he obtains a reading from it. It's a mysterious code, with the Bluggsville City logo beside it. Max and Oscar uncover the identity of the dog it was assigned to and are determined to find out why the chip was never implanted. Oscar, smitten by the dog in the photo, is especially eager. When their hunt lands them at a pound for robo-dogs, they resolve to set the dogs free. Little do they know the chip is transmitting their location details to forces that threaten their own freedom.
From the creator of the bestselling Mr. Panda series comes an amusing picture book about the fun you can have when you unplug. Meet Blip. Blip loves being plugged into her computer. When a blackout occurs, Blip trips over her wire and tumbles outside. Suddenly, Blip's gray world is filled with color and excitement. She plays with her new friends and has adventures all day long. When Blip finally returns home, she realizes that the world can be even brighter once you unplug.
An engaging picture book biography based on the incredible true story of a Jewish refugee who pioneered home video games and launched a worldwide obsession. Do you ever wonder how video gaming was invented? What came before your PlayStation or Xbox? This is the story of Ralph Baer, a refugee from Nazi Germany, who used his skills--and a lot of ingenuity and persistence--to make life a little more fun. Television was new when Ralph returned from serving in World War II, but he didn't settle for watching TV. He knew it could be even more fun if you could play with it. He tinkered and tested, got help and rejected, but with perseverance and skill, he made his vision come true! This is the inspiring story of a fearless inventor who made TV video games a reality.
Matthew Fuller analyses the tools which we all use everyday to interface with the world - Web browsers, search engines, word processors. He presents a 'critical help system' to help us understand what is really going on behind the menu and the windows of our computer screens.
*Winner of the 2022 Pop Culture Classroom Excellence in Graphic Literature Award for Best Children’s Nonfiction!* Two curious robots seek the answers to life’s most pressing—and hilarious—questions in this full-color graphic novel series by Jim Benton, New York Times bestselling author and creator of Franny K. Stein and Catwad! Join Jop and Blip as they follow their curiosity and investigate these seemingly odd questions using their own brand of logic, critical thinking skills, STEM knowledge, and humor. • Can you hear a penguin fart on Mars? • What if you wanted a dragon sandwich? • Why do we need TWO ears? With Jop and Blip, everything is worth knowing! Perfect for fans of Dav Pilkey and Dan Gutman!
Whew!! What a week that was as Canadians went from being the 'peaceable kingdom' talking about the need for cooperation and consultation to what many described as 'a full blown national crisis'. The Prime Minister and Conservative Government had turned an 'economic crisis' into a 'political crisis', then a 'constitutional crisis'. And if that wasn't enough of a week's work, the Prime Minister managed to also turn it into a 'crisis of national unity'. And some say Canadian politics and politicians are boring!!!!! Accusations of "traitor", "coup d'état", "illegitimate", "undemocratic"; "loss of confidence", "loss of trust", "socialist", "separatist", and "deals with the devil", reverberated across the floor of the House of Commons. Each of the 'crisis' that engulfed the Hill over those eight days had political consequences for those involved and for the parliamentary system. Stephen Harper may have survived to fight another day but in doing so he may have committed his most serious strategic error and will pay a heavy price for it over the next months and years. It is my contention that he is as much a strategic stumbler as a master strategist, and, that his long term goal to make the Conservative party Canada's 'natural governing party' and to move Canadian society to the right has been derailed.
Our day-to-day experiences over the past decade have taught us that there must be limits to our tremendous appetite for energy, natural resources, and consumer goods. Even utility and oil companies now promote conservation in the face of demands for dwindling energy reserves. And for years some biologists have warned us of the direct correlation between scarcity and population growth. These scientists see an appalling future riding the tidal wave of a worldwide growth of population and technology. A calm but unflinching realist, Catton suggests that we cannot stop this wave - for we have already overshot the Earth's capacity to support so huge a load. He contradicts those scientists, engineers, and technocrats who continue to write optimistically about energy alternatives. Catton asserts that the technological panaceas proposed by those who would harvest from the seas, harness the winds, and farm the deserts are ignoring the fundamental premise that "the principals of ecology apply to all living things." These principles tell us that, within a finite system, economic expansion is not irreversible and population growth cannot continue indefinitely. If we disregard these facts, our sagging American Dream will soon shatter completely.