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Discusses the basic science concept of light and darkness.
Light pervades the world, and when it is not light, darkness emerges and is combated by electric illumination. Despite this globally shared human experience in which spaces appear radically different depending on time, season, and weather, social science investigation on the subject is meager. From Light to Dark fills this gap, focusing on our interaction with daylight, illumination, and darkness. Tim Edensor begins by examining the effects of daylight on our perception of landscape, drawing on artworks, particular landscapes, and architectural practice. He then considers the ways in which illumination is often contested and can be used to express power, looking at how capitalist, class, ethnic, military, and state power use lighting to reinforce their authority over space. Edensor also considers light artists such as Olafur Eliasson and festivals of illumination before turning a critical eye to the supposedly dangerous, sinister associations of darkness. In examining the modern city as a space of fantasy through electric illumination, he studies how we are seeking—and should seek—new forms of darkness in reaction to the perpetual glow of urban lighting. Highly original and absorbingly written, From Light to Dark analyzes a vast array of artistic interventions, diverse spaces, and lighting technologies to explore these most basic human experiences.
This book looks at the differences between light and dark. - Darkness is the absence of light. You can make a dark box to show how we need light to see. - Experiment using ice cubes in boxes to show that dark colours absorb more sunlight than light colours. - Look at how some animals have evolved to "e;see"e; in the dark using other senses and try it out yourself! And much more!
A deeply panoramic tour of the night, from its brightest spots to the darkest skies we have left. A starry night is one of nature's most magical wonders. Yet in our artificially lit world, three-quarters of Americans' eyes never switch to night vision and most of us no longer experience true darkness. In The End of Night, Paul Bogard restores our awareness of the spectacularly primal, wildly dark night sky and how it has influenced the human experience across everything from science to art. From Las Vegas' Luxor Beam -- the brightest single spot on this planet -- to nights so starlit the sky looks like snow, Bogard blends personal narrative, natural history, science, and history to shed light on the importance of darkness -- what we've lost, what we still have, and what we might regain -- and the simple ways we can reduce the brightness of our nights tonight.
Christians are supposed to be “the light of the world.” Yet we seem to spend most of our time stumbling in the dark. We want answers carved in stone, and instead we get uncertainty. We want a clearly marked path and a panoramic view of the future, and God gives us only fleeting glimpses of what lies ahead—and just enough light to take the next step. So what do we do? We take the next step. In her much anticipated follow-up to Looking for God, Nancy Ortberg takes readers on a journey that began thousands of years ago. From an ancient cave in Turkey to the California coast, Nancy highlights the often unexpected, sometimes imperceptible, yet always extraordinary means God uses to light our way through even the most painful and challenging moments in life.
A collection of short stories and poems that tell a tale of growing up on the wrong side of the tracks of life and seen through the eyes of two authors. The words expressed in this book are from the heart, the eyes and soul of a desire to live a fruitful life. Regardless of their past, a struggle to gain a positive perspective are what the authors attempt to reveal. But with this book the reader is at least able to see for themselves that life for some is less than desirable, and with the stories and poems; their interpretations will open the door to healing and that no one is ever really alone.
How do we create a satisfactory user experience when limited to a small device? This new guide focuses on usability for mobile devices, primarily smartphones and touchphones, and covers such topics as developing a mobile strategy, designing for small screens, writing for mobile, usability comparisons, and looking toward the future. The book includes 228-full color illustrations to demonstrate the points. Based on expert reviews and international studies with participants ranging from students to early technology adopters and business people using websites on a variety of mobile devices, this guide offers a complete look at the landscape for a mobile world. Author Jakob Nielsen is considered one of the world's leading experts on Web usability. He is the author of numerous best-selling books, including Prioritizing Web Usability and the groundbreaking Designing Web Usability, which has sold more than 250,000 copies and has been translated in 22 languages.
This volume on Visual Psychophysics documents the current status of research aimed toward understanding the intricacies of the visual mechanism and its laws of operation in intact human perceivers. As can be seen from the list of contributors, the problems of vision engage the interest and experimental ingenuity of investi gators from a variety of disciplines. Thus we find authors affiliated with depart ments of biology, medical and physiological physics, ophthalmology, physics, physiology and anatomy, psychology, laboratories of neurophysiology, medical clinics, schools of optometry, visual and othcr types of research institutes. A continuing interplay between psychophysical studies and physiological work is everywhere evident. As more information about the physiological basis of vision accumulates, and new studies and analyses of receptor photochemistry and the neurophysiology of retina and brain appear, psychophysical studies of the intact organism become more sharply focused, sometimes more complex, and often more specialized. Technological advances have increased the variety and precision of the stimulus controls, and advances in measurement techniques have reopened old problems and stimulated the investigation of new ones. In some cases, new concepts are being drawn in to help further our under standing of the laws by which the visual mechanism operates; in other cases, ideas enunciated long ago have been reevaluated, developed more fully, and reified in terms of converging evidence from both psychophysical experiments and unit recordings from visual cells.