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Darkness feels heavy, tangible, and hopeless. Was this darkness that of dusk or dawn? Were the faint hues of light gaining strength of fading? It was hard to distinguish because the psychotic inky darkness of abuse from my former spouse was complex. His darkness surrounded us. It suffocated us till no hope was left, but for a pinpoint of light.
What’s in the dark? Countless generations have gazed up at the night sky and asked this question—the same question that cosmologists ask themselves as they study the universe. The answer turns out to be surprising and rich. The space between stars is filled with an exotic substance called “dark matter” that exerts gravity but does not emit, absorb, or reflect light. The space between galaxies is rife with “dark energy” that creates a sort of cosmic antigravity causing the expansion of the universe to accelerate. Together, dark matter and dark energy account for 95 percent of the content of the universe. News reporters and science journalists routinely talk about these findings using terms that they assume we have a working knowledge of, but do you really understand how astronomers arrive at their findings or what it all means? Cosmologists face a conundrum: how can we study substances we cannot see, let alone manipulate? A powerful approach is to observe objects whose motion is influenced by gravity. Einstein predicted that gravity can act like a lens to bend light. Today we see hundreds of cases of this—instances where the gravity of a distant galaxy distorts our view of a more distant object, creating multiple images or spectacular arcs on the sky. Gravitational lensing is now a key part of the international quest to understand the invisible substance that surrounds us, penetrates us, and binds the universe together. A Ray of Light in a Sea of Dark Matter offers readers a concise, accessible explanation of how astronomers probe dark matter. Readers quickly gain an understanding of what might be out there, how scientists arrive at their findings, and why this research is important to us. Engaging and insightful, Charles Keeton gives everyone an opportunity to be an active learner and listener in our ever-expanding universe. Watch a video with Charles Keeton: Watch video now. (http://www.youtube.com/watch?v=Uc3byXNS1G0).
The first hands-on book that teaches readers how to heal themselves and others. Fully illustrated with hand positions and featuring true stories. Illustrations.
An invaluable compendium of 75 creative art projects for art educators and classroom teachers This authoritative, practical, and comprehensive guide offers everything teachers need to know to conduct an effective arts instruction and appreciation program. It meets secondary art teacher's unique needs for creating art lessons that cover everything from the fundamentals to digital media careers for aspiring artists. The book includes ten chapters that provide detailed instructions for both teachers and students, along with creative lesson plans and practical tools such as reproducible handouts, illustrations, and photographs. Includes 75 fun and creative art projects Fully updated to reflect the latest changes in secondary art instruction, including digital media and digital photography Heavily illustrated with photographs and drawings For art teachers, secondary classroom teachers, and homeschoolers, this is the ideal hands-on guide to art instruction for middle school and high school students.
Spectrometric Techniques, Volume II provides information pertinent to vacuum ultraviolet techniques to complete the demonstration of the diversity of methods available to the spectroscopist interested in the ultraviolet visible and infrared spectral regions. This book discusses the specific aspects of the technique of Fourier transform spectroscopy. Organized into five chapters, this volume begins with an overview of the large number of systematic effects in the recording of an interferogram. This text then examines the design approach for a Fourier transform spectrometer with focus on optics. Other chapters provide a brief background to outline the scientific usefulness of Fourier spectrometers and present a calculation giving the optical path difference required to solve a Doppler-broadened spectral feature. This book discusses as well the importance of good mechanical design to minimize sampling error contributions by mechanical mechanisms and resonances. The final chapter deals with photon counting techniques to measure dispersed radiation. This book is a valuable resource for spectroscopists.
Literacy teaching tends to take a structural approach to language, focusing on auditory products or skills such as sounds, morphemes, words, sentences, and vocabulary. However, new research suggests that the majority of English speakers actually think and learn in visual concepts, and that there is a cultural and linguistic mismatch between auditory teaching methods and the way students think and learn. This has important implications for all educators including those who work with students with neurogenic disabilities, such as autism spectrum disorders and ADHD. In her new book, Dr. Ellyn Lucas Arwood outlines a revolutionary four-tiered model of how a learner acquires language, and suggests ways to impose visual language functions onto an auditory language like English in order to improve learning for both neurotypical learners and those with neurogenic disabilities. Dr. Arwood provides tried-and-tested intervention strategies that work with all levels of ability, giving readers the knowledge and confidence to teach learners to become more literate in a way that raises learners' abilities to think and problem solve. This book takes a fresh look at how language and literacy interact, and will be of interest to educators and special educators, speech and language pathologists, and other professionals who support language learning and development.
If you or a loved one has been impacted by a critical diagnosis, this book will help illuminate the journey ahead.When a self-diagnosed shoulder injury turned out to be stage 4 lymphoma, Maureen O'Brien was reeling-and she wasn't alone. Her entire community had to grapple with this devastating news. But how should they reach out, and what could they do to help?When someone you know faces a critical diagnosis, it's difficult to understand what's expected of you. But if you're the one receiving the news, asking for help is its own struggle. In 26 Points of Light, O'Brien's community of care-family, friends, coworkers, extended family, and even medical staff-offer their unique experiences of the journey they walked with Maureen and share the knowledge they gained along the way. You'll learn:- How each caregiver was uniquely impacted by the diagnosis- Why the nurse-patient relationship is so important to anyone undergoing recovery- Why whatever you have to give is exactly the right thing to offer If someone you love has received an unexpected diagnosis, this book will help you "quarterback" their caregiving team and deliver constant, crucial encouragement. And for those experiencing it firsthand, it will illuminate their true impact on others and remind them that they are not alone.
Linda Seger, Th.D., explores what it means to be a Christian and a Democrat - and shows how the two are mutually inclusive.
Quantum wormhole technology brings about the end of human privacy in a novel “fizzing with ideas” by two of science fiction’s most acclaimed authors (Kirkus Reviews). From Arthur C. Clarke, the brilliant mind that brought us 2001: A Space Odyssey, and Stephen Baxter, the Philip K. Dick Award–winning author of The Time Ships, comes a novel of a day, not so far in the future, when the barriers of time and distance have suddenly turned to glass. When a brilliant, driven industrialist harnesses cutting-edge physics to enable people everywhere, at trivial cost, to see one another at all times—around every corner, through every wall—the result is the sudden and complete abolition of human privacy, forever. Then the same technology proves able to look backward in time as well. The Light of Other Days is a story that will change your view of what it is to be human.