DUSK OR DARK OR DAWN OR DAY

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Biological Rhythms

Author : Vinod Kumar
ISBN : 3540428534
Genre : Science
File Size : 68.99 MB
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(Chapters 11 to 14) summarise important features of the biological clock at the level of whole animal covering all vertebrate classes (fish to mammal). Chapters 15 and 16 are on long term (seasonal) rhythms in plants and higher vertebrates. Short term rhythms (ultradian rhythms), the significance of having a clock system in animals living in extreme (arctic) environments, and the diversity of circadian responses to melatonin, the key endocrine element involved in regulation of biological rhythms, have been discussed in Chapters 17 to 19. Finally, a chapter on sensitivity to light of the photoperiodic clock is added which, using vertebrate examples, illustrates the importance of wavelength and intensity of light on circadian and non-circadian functions. A well-known expert writes each chapter. When presenting information, the text provides consistent thematic coverage and feeling for the methods of investigation. Reference citation within the body of the text adequately reflects the literature as subject is developed. A chapter begins with an abstract that enables a reader to know at the first glance the important points covered in that chapter. The chapter concludes with a full citation of references included in the text, which could be useful for further reading. The book ends with a comprehensive subject index that may be useful for quick searches.
Category: Science

Magic Light And The Dynamic Landscape

Author : Jeanine Leech
ISBN : 9781608957309
Genre : Photography
File Size : 48.1 MB
Format : PDF
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It has been said many times that photography is painting with light, or that photography is all about light. For Jeanine Leech, the idea of painting with light is a passion. She uses it as a brush for color, texture, and dimension to create dynamic and expressive images. In this book, Leech details her techniques for finding and using the best light to create breathtaking landscape images. To get that special moment, you are often chasing the light. In landscape photography there are moments of defining light. It can be a single moment that may only last a second when the light is just perfect. These moments don’t happen every day but when they do one frame can tell the story with more visual impact than all the others. The ability to improvise, to stop and get the light when these moments occur randomly, is the difference between producing a standard photo and something that truly stand out. This book provides the basic principles of photography necessary for capturing this magic successfully. Starting with a rundown of the equipment that Leech uses and explaining the core concepts of photography, the book proceeds to detail shooting at different times of day. From the first light at dawn, through midday and onto dusk, Leech provides stunning examples of how each type of light can be used. Each photo in the book is accompanied by the camera settings used to capture it. True magic light is rare. It happens in a fleeting moment, not to be repeated again, lasting only a few minutes or seconds. Its quality is so unique that it changes the color, appearance and ultimately the mood of the subjects it falls upon. Part three of the book focuses on the different types of landscapes. First weather is covered. A photo shoot in the Smoky Mountains shows how attention to detail and setting can make the shot. The light and the weather change in mere seconds. As Leech points out, knowing the basics of photography and how to work your equipment quickly is essential. Each of the stunning photos in the book is a testament to this. After that Leach discusses how she chooses different landscapes. Intimate landscapes can be found anywhere. Sometimes making artistic choices like only focusing on a small portion of a setting provides an image with greater impact. Finally, the book covers the use of polarizer’s, various filters and multiple digital darkroom techniques.
Category: Photography

Insect Clocks

Author : D. S. Saunders
ISBN : 9781483182186
Genre : Science
File Size : 26.40 MB
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Insect Clocks is mainly concerned with the phenomena in which ""environmental time"" has a practical implication for the life of insects for them to perform behavioral or physiological episodes at the ""right time"" and season. This text first discusses the concept of rhythms and clocks, along with the seasonal changes in the environment that affect a particular group of organisms. This book then explains circadian rhythms of insects. Photoperiodism and seasonal cycles of development; photoperiodic response, clock, and counter; and other types of insect clock are also tackled. This text concludes by explaining the anatomical location of photoreceptors and clocks. This publication will be invaluable to those interested in studying insects and their development affected by circles of influences.
Category: Science

Principles And Practice Of Sleep Medicine E Book

Author : Meir H. Kryger
ISBN : 9781437727739
Genre : Medical
File Size : 50.40 MB
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Principles and Practice of Sleep Medicine, 5th Edition, by Meir H. Kryger, MD, FRCPC, Thomas Roth, PhD, and William C. Dement, MD, PhD, delivers the comprehensive, dependable guidance you need to effectively diagnose and manage even the most challenging sleep disorders. Updates to genetics and circadian rhythms, occupational health, sleep in older people, memory and sleep, physical examination of the patient, comorbid insomnias, and much more keep you current on the newest areas of the field. A greater emphasis on evidence-based approaches helps you make the most well-informed clinical decisions. And, a new more user-friendly, full-color format, both in print and online, lets you find the answers you need more quickly and easily. Whether you are preparing for the new sleep medicine fellowship examination, or simply want to offer your patients today's best care, this is the one resource to use! Make optimal use of the newest scientific discoveries and clinical approaches that are advancing the diagnosis and management of sleep disorders.
Category: Medical

The Kids Book Of World Religions

Author : Jennifer Glossop
ISBN : 9781554539819
Genre : Juvenile Nonfiction
File Size : 58.22 MB
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Explains the basic beliefs, customs, and rituals of twelve different world religions, and includes information about tribal and native religions of Africa, North America, and Australia.
Category: Juvenile Nonfiction

The Hot Belly Diet

Author : Suhas G. Kshirsagar
ISBN : 9781476734828
Genre : Health & Fitness
File Size : 68.36 MB
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From an internationally recognized physician who combines Eastern and Western medicine, a groundbreaking diet and total body health plan centered on digestive balance and metabolic transformation. The complaints that Dr. Suhas hears on a daily basis, from high body weight, low energy, and poor sleep, to headaches, unexplained congestion, and depression, all have a surprising common denominator: a weak digestive “fire.” Drawing on traditional Indian practices and principles, The Hot Belly Diet shows you how to optimize your digestive powers to foster rapid weight loss and vibrant health. At the core of this three-phase diet that makes lunch the most important meal of the day is a dish called khichadi (pronounced kitch-a-de)—a completely nutritious but incredibly easy-to-make meal that helps clear out your “ama,” or the digestive sludge that antagonizes weight loss, provokes hormonal imbalances, and ultimately triggers inflammation—the root cause of virtually all disease. This unique book also explains what foods are incompatible (milk and eggs, for example), why the sensation of hunger is essential, and how to time your meals throughout the day to avoid snacking. The Hot Belly Diet changes your relationship with food to make healthy eating—and living—effortless. Whether you’re suffering from a chronic condition, looking to prevent future illness, or just want to feel your best every day, The Hot Belly Diet will re-establish your body’s natural balance, creating a thinner, healthier, and happier you.
Category: Health & Fitness

Melatonin And The Mammalian Pineal Gland

Author : Josephine Arendt
ISBN : 0412536005
Genre : Science
File Size : 74.9 MB
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This volume provides the reader with an overview of an intriguing and interdisciplinary field of research. For the first time the mammalian pineal gland, its mode of action and its physiological effects are discussed in a comprehensive, single-authored work.
Category: Science

Guide To Owl Watching In North America

Author : Donald S. Heintzelman
ISBN : 9780486273440
Genre : Nature
File Size : 88.64 MB
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Superb guide by noted expert covers owl-watching equipment, owl pellets and food habits, migrations and invasions, survival adaptations, conservation and more. Detailed data about 19 native species: barn owl, screech owl, great gray owl, snowy owl, spotted owl, great horned owl, many others. Also guide to observing sites in 40 states and Canada. 84 photographs and illustrations.
Category: Nature