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Dams and Development in China: The Moral Economy of Water and Power
by Bryan TiltExamines the array of water-management decisions faced by Chinese leaders and their consequences for local communities.
Dams and Disease: Ecological Design and Health Impacts of Large Dams, Canals and Irrigation Systems
by William JobinA guide to help planners and engineers to the improvment of future water projects. The past century of global experience on water projects is presented as the basis for creating new approaches. First-hand analyses, including 35 case studies from 25 countries, portray the influence of politicians, biologists, engineers, computer models and physician
Dams and Water Transfers – An Overview / Barrages et Transferts d’Eau - Aperçu (ICOLD Bulletins Series #161)
by Cigb IcoldThe present Bulletin presents a complete response from the ‘Technical Committee of ICOLD on Dams and Water Transfer (CDWT)’ to the Terms of Reference. It starts with related global information, brings out related efforts made in countries with completely differing climate, economy, population distribution etc. about present status within and between river basins & countries – both surplus and or deficit, while recognizing the crucial role played by dams in water transfer to needy regions. It then enumerates guidelines followed in considering various options, while identifying geographical issues, limited by political territories & legal issues like water treaties. Essentially then, it dwells on possible need, potential and problems in water transfers that must be handled to overcome B/C issues faced by needy countries. In order to assist concerned professionals, the Bulletin finally elaborates on objections raised by different stake-holders in the subject and provides answers generated globally. The on-going debate world-over about WRD versus environmental impacts is then dealt with to help Member-countries overcome various issues. Le présent Bulletin présente une réponse complète du « Comité Technique sur les barrages et les transferts d’eau ». Il commence par des informations mondiales, fait ressortir les efforts déployés dans des pays au climat, à l'économie, à la répartition de la population, etc. complètement différents sur l'état actuel au sein et entre les bassins fluviaux et les pays - à la fois excédentaire et / ou déficitaire, tout en reconnaissant le rôle crucial joué par les barrages dans le transfert d'eau vers les régions nécessiteuses. Il énumère ensuite les lignes directrices suivies pour considérer diverses options, tout en identifiant les problèmes géographiques, limités par les territoires politiques et les questions juridiques comme les traités sur l'eau. Essentiellement, il s'attarde donc sur les besoins, le potentiel et les problèmes possibles des transferts d'eau qui doivent être traités pour surmonter les problèmes auxquels sont confrontés les pays dans le besoin. Afin d'aider les professionnels concernés, le Bulletin élabore enfin les objections soulevées par les différents acteurs du sujet et apporte des réponses générées globalement. Le débat en cours dans le monde entier par rapport aux impacts environnementaux est ensuite traité pour aider les pays membres à surmonter divers problèmes.
Dams for Hydroelectric Energy Barrages pour l’Énergie Hydroélectrique (ICOLD Bulletins Series #163)
by Nathalie SchaunerThe Bulletin is intended as a general document aimed at a wide technical audience involved with or affected by hydropower. Basic background data and some statistics are presented, with specific reference to hydro-electricity production, hydropower dams, hydropower plants, in operation or under construction. Key aspects of hydropower are discussed. Data are presented about typical capital and both internal and external operating costs. Environmental and social impacts are discussed and reference is made to the impact reservoirs have on greenhouse gas emissions. A section is dedicated to the exploitation of tidal energy by means of barrage systems. The current extent of hydropower development and the influence of policies aimed to favour the development of renewable energies are also discussed. Reference sources of information, on hydropower in general and interesting case-histories, are provided. Le Bulletin se veut un document général destiné à un large public technique impliqué ou affecté par l'hydroélectricité. Des données de base et quelques statistiques sont présentées, avec une référence spécifique à la production hydroélectrique, aux barrages hydroélectriques, aux centrales hydroélectriques, en fonctionnement ou en construction. Les principaux aspects de l'hydroélectricité sont discutés. Les données sont présentées sur le capital type et les coûts de fonctionnement internes et externes. Les impacts environnementaux et sociaux sont discutés et il est fait référence à l'impact des réservoirs sur les émissions de gaz à effet de serre. Une section est dédiée à l'exploitation de l'énergie marémotrice au moyen de systèmes de barrage. L'ampleur actuelle du développement hydroélectrique et l'influence des politiques visant à favoriser le développement des énergies renouvelables sont également abordées. Des sources d'information de référence, sur l'hydroélectricité en général et des études de cas intéressantes, sont fournies.
Dams in Japan: Past, Present and Future
by Japan Commission on Large DamsOverview of Japan’s long water history, by the Japanese Commission on large dams. Starting from the 7th century, when irrigation ponds were first constructed for paddy cropping, until the beginning of the 21st century. Elaborates on various roles of dams: water supply, power generation and flood control. Moreover, tries to clarify the negative impacts of dams on the natural environment and local societies, as well as extensive efforts made to minimize these impacts. Includes appendices with location and characteristics of main dams, administrative organs, river management system and water resources development river systems and facilities to offer the full picture. Richly-illustrated. Intended for dam and water resources professionals.
The Dams of Western San Diego County
by John MartinThe unreliability of the San Diego River compelled the Franciscan fathers to construct the area's first dam in 1813 to conserve drinking and irrigation water for the Mission San Diego de Alcal". This water-driven circumstance continued and expanded in the ensuing American era. Lacking a reliable water source at the turn of the 20th century, San Diego County was destined to experience modest growth. The region's semiarid conditions, cyclical droughts, and existing river systems determined that the only effective way to maintain a ready water supply was to conserve runoff and river floodwaters behind dam-created reservoirs. Between 1888 and 1934, private and municipal interests constructed a series of massive structures that made San Diego County the dam-building center of the world. The county featured some of America's first multiple arch dams and earliest hydraulic fill dams. Into the mid-1940s, dammed reservoirs remained the principle water source for county consumers and made the municipal expansion of the city of San Diego possible.
Dams Safety and Society
by Ljiljana Spasic-GrilThis book addresses current international practices applied for dam safety assessments by looking at a portfolio of dam safety projects in various developing countries (Armenia, Georgia, Tajikistan, Mauritius, Madagascar, Sri Lanka, Myanmar and Vietnam) spread across three continents (Europe, Africa and Asia). Safety assessment involved the review of 134 existing dams and comparison with the best international practices. A large part of dam safety assessment involves understanding of dam hazards, standards applied in the design and maintenance, as well as expectation and social circumstances under which the dams have been designed and constructed in a particular country. For example, standards for design floods, ground investigation, selection of design soil parameters and design earthquakes etc. used are often either non-existent or inadequate, which could lead to an unsafe design. If there are no standards to be applied in dam design and construction, consultants are often under pressure from clients to come up with minimalistic investigation and designs, which, after a few years after dam construction, show signs of deficiencies. Very often countries have no regulations and standards for requirements that should cover the maintenance and operation of dams. The book also describes the Portfolio Risk Assessment of Dams, which can be used as a tool by clients and the funding agencies to identify priority assessment and rehabilitation projects that consider societal and economic losses. It also demonstrates how the implementation of Emergency Preparedness Planning could significantlyreduce the number of people at risk. This book aims to help clients, consultants and funding agencies which are engaged in dam safety assessment projects in developing countries to focus on issues that are based on past lessons learnt.
Dance Lexicon in Shakespeare and His Contemporaries: A Corpus Based Approach (Studies in Performance and Early Modern Drama)
by Fabio CiambellaThis book provides a thorough analysis of terpsichorean lexis in Renaissance drama. Besides considering not only the Shakespearean canon but also the Bard’s contemporaries (e.g., dramatists as John Marston and Ben Jonson among the most refined Renaissance dance aficionados), the originality of this volume is highlighted in both its methodology and structure. As far as methods of analysis are concerned, corpora such as the VEP Early Modern Drama collection and EEBO, and corpus analysis tools such as #LancsBox are used in order to offer the widest range of examples possible from early modern plays and provide co-textual references for each dance. Examples from Renaissance playwrights are fundamental for the analysis of connotative meanings of the dances listed and their performative, poetic and metaphoric role in sixteenth- and seventeenth-century drama. This study will be of great interest to Renaissance researchers, lexicographers and dance historians.
Dance Music Manual: Tools, Toys, and Techniques
by Rick SnomanDance Music Manual, aimed at the novice and seasoned professional alike, takes the reader through the software and hardware needed to create original, captivating, and professional sounding music. Key features of Dance Music Manual include: How to create compelling, professional-sounding original or remixed dance tracks. The differences between different genres and how to produce them. How to expose your tracks to their chosen audience and equip you with the skills to develop your career as a dance music producer and engineer. Along with the book is a companion website, which provides examples of synthesis programming, compression, effects, MIDI files, and examples of the tracks discussed in this edition. The new and improved fourth edition covers processes and techniques used by music producers, masters, mixers, and DJs. Each page is full of facts presented in a manner that is easy to absorb and implement.
Dance Music Manual
by Rick SnomanDance Music Manual – a comprehensive guidebook for novice and seasoned professionals alike – walks readers through the tools and techniques required to create original, captivating and professional-sounding electronic dance music.Key features of the Dance Music Manual include the following: Learn to navigate the complex world of electronic music production. Unleash your creativity with practical advice, insider tips and expert techniques. Explore the intricacies of crafting infectious grooves and sculpting sounds. From beginner to expert, this comprehensive guide illuminates every aspect of producing, mixing and mastering dance music. Used by professionals worldwide, this updated fifth edition has been significantly rewritten and includes new content on building your studio, processing, sampling, sound design and a chapter on DJ techniques. A companion website supports the book by providing audio and video examples of the techniques.
Dance Notations and Robot Motion (Springer Tracts in Advanced Robotics #111)
by Jean-Paul Laumond Naoko AbeHow and why to write a movement? Who is the writer? Who is the reader? They may be choreographers working with dancers. They may be roboticists programming robots. They may be artists designing cartoons in computer animation. In all such fields the purpose is to express an intention about a dance, a specific motion or an action to perform, in terms of intelligible sequences of elementary movements, as a music score that would be devoted to motion representation. Unfortunately there is no universal language to write a motion. Motion languages live together in a Babel tower populated by biomechanists, dance notators, neuroscientists, computer scientists, choreographers, roboticists. Each community handles its own concepts and speaks its own language. The book accounts for this diversity. Its origin is a unique workshop held at LAAS-CNRS in Toulouse in 2014. Worldwide representatives of various communities met there. Their challenge was to reach a mutual understanding allowing a choreographer to access robotics concepts, or a computer scientist to understand the subtleties of dance notation. The liveliness of this multidisciplinary meeting is reflected by the book thank to the willingness of authors to share their own experiences with others.
The Dancing Bees: Karl von Frisch and the Discovery of the Honeybee Language
by Tania MunzWe think of bees as being among the busiest workers in the garden, admiring them for their productivity. But amid their buzzing, they are also great communicators--and unusual dancers. As Karl von Frisch (1886-1982) discovered during World War II, bees communicate the location of food sources to each other through complex circle and waggle dances. For centuries, beekeepers had observed these curious movements in hives, and others had speculated about the possibility of a bee language used to manage the work of the hive. But it took von Frisch to determine that the bees' dances communicated precise information about the distance and direction of food sources. As Tania Munz shows in this exploration of von Frisch's life and research, this important discovery came amid the tense circumstances of the Third Reich. The Dancing Bees draws on previously unexplored archival sources in order to reveal von Frisch's full story, including how the Nazi government in 1940 determined that he was one-quarter Jewish, revoked his teaching privileges, and sought to prevent him from working altogether until circumstances intervened. In the 1940s, bee populations throughout Europe were facing the devastating effects of a plague (just as they are today), and because the bees were essential to the pollination of crops, von Frisch's research was deemed critical to maintaining the food supply of a nation at war. The bees, as von Frisch put it years later, saved his life. Munz not only explores von Frisch's complicated career in the Third Reich, she looks closely at the legacy of his work and the later debates about the significance of the bee language and the science of animal communication. This first in-depth biography of von Frisch paints a complex and nuanced portrait of a scientist at work under Nazi rule. The Dancing Bees will be welcomed by anyone seeking to better understand not only this chapter of the history of science but also the peculiar waggles of our garden visitors.
Dancing with Bees: A Journey Back to Nature
by Brigit Strawbridge HowardA naturalist’s passionate dive into the world of bees of all stripes--what she has learned about them, and what we can learn from them Brigit Strawbridge Howard was shocked the day she realised she knew more about the French Revolution than she did about her native trees. And birds. And wildflowers. And bees. The thought stopped her—quite literally—in her tracks. But that day was also the start of a journey, one filled with silver birches and hairy-footed flower bees, skylarks, and rosebay willow herb, and the joy that comes with deepening one’s relationship with place. Dancing with Bees is Strawbridge Howard’s charming and eloquent account of a return to noticing, to rediscovering a perspective on the world that had somehow been lost to her for decades and to reconnecting with the natural world. With special care and attention to the plight of pollinators, including honeybees, bumblebees, and solitary bees, and what we can do to help them, Strawbridge Howard shares fascinating details of the lives of flora and fauna that have filled her days with ever-increasing wonder and delight.
Dancing with the River
by Kuntala Lahiri-Dutt Gopa SamantaWith this book Kuntala Lahiri-Dutt and Gopa Samanta offer an intimate glimpse into the microcosmic world of "hybrid landscapes." Focusing on chars--the part-land, part-water, low-lying sandy masses that exist within the riverbeds in the floodplains of lower Bengal--the authors show how, both as real-life examples and as metaphors, chars straddle the conventional categories of land and water, and how people who live on them fluctuate between legitimacy and illegitimacy. The result, a study of human habitation in the nebulous space between land and water, charts a new way of thinking about land, people, and people's ways of life.
A Dangerous Master: How to Keep Technology from Slipping Beyond Our Control
by Wendell WallachWe live in an age of awesome technological potential. From nanotechnology to synthetic organisms, new technologies stand to revolutionize whole domains of human experience. But with awesome potential comes awesome risk: drones can deliver a bomb as readily as they can a new smartpho≠ makers and hackers can 3D-print guns as well as tools; and supercomputers can short-circuit Wall Street just as easily as they can manage your portfolio. One thing these technologies can’t do is answer the profound moral issues they raise. Who should be held accountable when they go wrong? What responsibility do we, as creators and users, have for the technologies we build? In A Dangerous Master, ethicist Wendell Wallach tackles such difficult questions with hard-earned authority, imploring both producers and consumers to face the moral ambiguities arising from our rapid technological growth. There is no doubt that scientific research and innovation are a source of promise and productivity, but, as Wallach, argues, technological development is at risk of becoming a juggernaut beyond human control. Examining the players, institutions, and values lobbying against meaningful regulation of everything from autonomous robots to designer drugs, A Dangerous Master proposes solutions for regaining control of our technological destiny. Wallach’s nuanced study offers both stark warnings and hope, navigating both the fears and hype surrounding technological innovations. An engaging, masterful analysis of the elements we must manage in our quest to survive as a species, A Dangerous Master forces us to confront the practical--and moral--purposes of our creations.
Dangerous Work: Diary of an Arctic Adventure
by Sir Arthur Conan DoyleIn 1880 a young medical student named Arthur Conan Doyle embarked upon the "first real outstanding adventure" of his life, taking a berth as ship's surgeon on an Arctic whaler, the Hope. The voyage took him to unknown regions, showered him with dramatic and unexpected experiences, and plunged him into dangerous work on the ice floes of the Arctic seas. He tested himself, overcame the hardships, and, as he wrote later, "came of age at 80 degrees north latitude. " Conan Doyle's time in the Arctic provided powerful fuel for his growing ambitions as a writer. With a ghost story set in the Arctic wastes that he wrote shortly after his return, he established himself as a promising young writer. A subsequent magazine article laying out possible routes to the North Pole won him the respect of Arctic explorers. And he would call upon his shipboard experiences many times in the adventures of Sherlock Holmes, who was introduced in 1887's A Study in Scarlet. Out of sight for more than a century was a diary that Conan Doyle kept while aboard the whaler. Dangerous Work: Diary of an Arctic Adventure makes this account available for the first time. With humor and grace, Conan Doyle provides a vivid account of a long-vanished way of life at sea. His careful detailing of the experience of arctic whaling is equal parts fascinating and alarming, revealing the dark workings of the later days of the British whaling industry. In addition to the transcript of the diary, the e-book contains two nonfiction pieces by Doyle about his experiences; and two of his tales inspired by the journey. To the end of his life, Conan Doyle would look back on this experience with awe: "You stand on the very brink of the unknown," he declared, "and every duck that you shoot bears pebbles in its gizzard which come from a land which the maps know not. It was a strange and fascinating chapter of my life. " Only now can the legion of Conan Doyle fans read and enjoy that chapter.
The Dangers of Automation in Airliners: Accidents Waiting to Happen
by Jack J. HerschThe award-winning journalist delves “into the confluence of modern airplane technology and pilot behavior to probe how and why flight disasters happen” (BookTrib).Aviation automation has been pushed to its limits, with pilots increasingly relying on it. Autopilot, autothrottle, autoland, flight management systems, air data systems, inertial guidance systems. All these systems are only as good as their inputs which, incredibly, can go rogue. Even the automation itself is subject to unpredictable failure. And what of the pilots? They began flight training with their hands on the throttle and yoke, and feet on the rudder pedals. Then they reached the pinnacle of their careers—airline pilot—and suddenly they were going hours without touching the controls other than for a few minutes on takeoff and landing. Are their skills eroding? Is their training sufficient to meet the demands of today’s planes?The Dangers of Automation in Airliners delves deeply into these questions. You’ll be in the cockpits of the two doomed Boeing 737 MAXs, the Airbus A330 lost over the South Atlantic, and the Bombardier Q400 that stalled over Buffalo. You’ll discover exactly why a Boeing 777 smacked into a seawall, missing the runway on a beautiful summer morning. And you’ll watch pilots battling—sometimes winning and sometimes not—against automation run amok. This book also investigates the human factors at work. You’ll learn why pilots might overlook warnings or ignore cockpit alarms. You’ll observe automation failing to alert aircrews of what they crucially need to know while fighting to save their planes and their passengers.The future of safe air travel depends on automation. This book tells its story.
Daniel Coldstar #2: The Betrayer (Daniel Coldstar #2)
by Stel PavlouIn this exciting sequel to The Relic War, adventure calls…but can Truth prevail?The galaxy is at war. And Daniel Coldstar and his Truth Seeker friends are traversing the galaxy, saving refugees from destroyed worlds and trying to locate the stolen Book of Planets before the evil Sinja use it to cause any more damage.Meanwhile, someone wants Daniel Coldstar to stray from his mission and sends him messages that lead him right to an abandoned ship—a ship that has mysterious ties to Daniel’s past.What does the anonymous messenger want with him? And who can Daniel really trust in a galaxy filled with the Sinja’s devious lies? Ever since his old friend Blink and an anatom named Hex betrayed him, Daniel isn’t sure. When the messages eventually lead Daniel to Ionica Lux’s home, long-held secrets are finally revealed and Daniel and Ionica will have to put their lives on their line to save their loved ones and destroy the Sinja forces once and for all.
Danish Shipping in the 21st Century: Navigating Troubled Waters (Palgrave Studies in Maritime Economics)
by Martin Jes Iversen Jesper BuhlSpurred by global macro-economic shifts, commercial and financial turbulence, as well as technological leaps in the early years of the new millennium, the Danish shipping industry has changed dramatically since the turn of the century. This book provides a new understanding of how rapid business environmental changes frame strategic choices and industry structures. The authors combine a conceptual chapter with three selected business history cases to apply a methodical approach to their study. Together, the five chapters unveil patterns in the development of Danish shipping which are historical and, at the same time, consider questions that address the present situation and the challenges of our time. In other words, this short book uses history for the purpose of understanding the present and to develop thinking for the future.
Dante and the Early Astronomer: Science, Adventure, and a Victorian Woman Who Opened the Heavens
by Tracy DaughertyExplore the evolution of astronomy from Dante to Einstein, as seen through the eyes of trailblazing Victorian astronomer Mary Acworth Evershed In 1910, Mary Acworth Evershed (1867–1949) sat on a hill in southern India staring at the moon as she grappled with apparent mistakes in Dante’s Divine Comedy. Was Dante’s astronomy unintelligible? Or was he, for a man of his time and place, as insightful as one could be about the sky? As the twentieth century began, women who wished to become professional astronomers faced difficult cultural barriers, but Evershed joined the British Astronomical Association and, from an Indian observatory, became an experienced observer of sunspots, solar eclipses, and variable stars. From the perspective of one remarkable amateur astronomer, readers will see how ideas developed during Galileo’s time evolved or were discarded in Newtonian conceptions of the cosmos and then recast in Einstein’s theories. The result is a book about the history of science but also a poetic meditation on literature, science, and the evolution of ideas.
The Danube River Basin (The Handbook of Environmental Chemistry #39)
by Igor LiskaThis volume offers a comprehensive review of the chemical, biological and hydromorphological quality of the Danube. The first part examines the chemical pollution of surface waters, focusing on organic compounds (with special emphasis given to EU WFD priority substances and Danube River Basin specific pollutants), heavy metals and nutrients. Attention is also given to pollution of groundwater and drinking water resources by hazardous substances and to radioactivity in the Danube. The second part highlights the biology and hydromorphology of the Danube. It focuses on benthic macroinvertebrates, phytobenthos, macrophytes, fish, phytoplankton as well as microbiology, with chapters dedicated to gaps and uncertainties in the ecological status assessment and to invasive alien species. Further chapters dealing with the hydromorphology, sediment management and isotope hydrology complete the overall picture of the status of the Danube.
Dare to Know: A Novel
by James Kennedy&“A razor-smart sci-fi corporate noir nightmare. Dare to Know is what happens when Willy Loman sees through the Matrix. A heartbreaking, time-bending, galactic mindbender delivered in the mordantly funny clip of a doomed antihero.&”—Daniel Kraus, co-author of The Shape of Water Dark Matter meets Annihilation in this mind-bending and emotional speculative thriller set in a world where the exact moment of your death can be predicted—for a price. Our narrator is the most talented salesperson at Dare to Know, an enigmatic company that has developed the technology to predict anyone&’s death down to the second. Divorced, estranged from his sons, and broke, he's driven to violate the cardinal rule of the business by forecasting his own death day. The problem: his prediction says he died twenty-three minutes ago. The only person who can confirm its accuracy is Julia, the woman he loved and lost during his rise up the ranks of Dare to Know. As he travels across the country to see her, he&’s forced to confront his past, the choices he's made, and the terrifying truth about the company he works for. Wildly ambitious and highly immersive, this mind-bending thriller explores the destructive power of knowledge and collapses the boundaries between reality, myth, and conspiracy as it races toward its shocking conclusion.
DARE's Dictionary of Environmental Sciences and Engineering: English-french-arabic
by A.M.O. Mohamed; D. Chenaf; S. El-ShahedIdeal for anyone interested in environmental issues, this dictionary draws together information from a variety of sources to better facilitate understanding of this wide-ranging subject. Detailed explanations help to promote clearer communication between professionals and provide a standardized reference point for technical translation, a quick-reference guide for researchers and professionals, and an invaluable knowledge base for cross-disciplinary readers from the fields of health, politics, economics and engineering.
Daring Dozen: The Twelve Who Walked on the Moon
by Suzanne SladeA gorgeous introduction to the twelve brave men who have left footprints on the moon, just in time to celebrate the fiftieth anniversary of the first lunar landing.On July 20, 1969, Neil Armstrong took one small step and made history. Over the course of the next three-and-a-half years, twelve lunar explorers, including Alan Shepard and Gene Cernan, touched down on the moon's surface. Author and engineer Suzanne Slade reveals how the Apollo missions (1969-1972) built upon one another and led to important discoveries about our nearest neighbor in space. Back matter includes an afterword by Alan Bean (1932-2018), the fourth person to walk on the moon.
Dark Aeon: Transhumanism and the War Against Humanity
by Joe AllenHumanity Is Consumed by Relentless Transformation Like a thief in the night, artificial intelligence has inserted itself into our lives. It makes important decisions for us every day. Often, we barely notice. As Joe Allen writes in this groundbreaking book, &“Transhumanism is the great merger of humankind with the Machine. At this stage in history, it consists of billions using smartphones. Going forward, we&’ll be hardwiring our brains to artificial intelligence systems.&” The world-famous robot, Sophia, symbolizes a rising techno-religion. She takes her name from the goddess—or Aeon—whose fall from grace is described in the Gnostic Gospels. With an academic background in both science and theology, Allen confronts the paradox of what he calls &“good people constructing a digital abomination.&” Dark Aeon is nothing less than a cri de coeur for humanity itself. He takes us on a roller coaster ride through history and the emergence of Scientism, and from government-mandated mRNA vaccines to the weird visions of cyborg billionaires like Elon Musk. From Silicon Valley to China, these globalists&’ visions of humanity&’s future, exposed and described in Dark Aeon, are dire and terrifying. But Joe Allen argues that humanity&’s salvation is within our grasp. Only if we refuse to avert our eyes from the impending twilight before us.