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How Everything Works
by DKDiscover an all-in-one encyclopedia that takes you on an explanatory tour of the world from your own body to outer space.Have you ever wondered how an email gets to someone on the other side of the world in just a few seconds or why it&’s a bad idea to stand under a tree during a thunderstorm? Discover the answers to all these questions and more with these mind-boggling how things work books for children aged 9 and above!Each page of this mind-blowingly detailed and ambitious encyclopedia will guide you through the natural world and the technology that surrounds you. Giant, page-filling illustrations take objects apart – or take the roofs and walls off buildings – to show you how they work, explaining both basic principles (such as photosynthesis) as well as broader concepts (like how all the living things in a rainforest interact). Explore each and every page of this engaging how things work book to discover:- Key insights into both the natural and human worlds- Striking photography that brings certain concepts to life- A diverse range of chapters coinciding with STEM subjects at school In this how things work encyclopedia, chapters range from the human body to cities and industry, to planet Earth, taking in sleep patterns, cooking, sewage systems, wind farms, fungi spores, and plate tectonics along the way. How Everything Works is perfect for children studying STEM subjects at school or anyone who is simply curious about how nature and the modern world work.
How Fermented Foods Feed a Healthy Gut Microbiota: A Nutrition Continuum
by M. Andrea Azcarate-Peril Roland R. Arnold José M. Bruno-BárcenaThis book examines the role of fermented foods on human gut health and offers a unique contribution to this rapidly growing area of study. Fermented foods have been consumed by humans for millennia. This method of food preservation provided early humans with beneficial bacteria that re-populated the gut microbiota upon consumption. However, novel methods of production and conservation of food have led to severed ties between the food that modern humans consume and the gut microbiota. As a consequence, there has been a documented increase in the prevalence of autoimmune diseases and obesity, which has been correlated to decreased diversity of gut microbes, while infectious disorders have decreased in the three past decades.With the intention of providing a thorough overview of the relationship between fermented foods, nutrition, and health, the editors have grouped the chapters into three thematic sections: food and their associated microbes, the oral microbiome, and the gut microbiome. After an introduction dedicated to the environmental microbiome, Part I provides an overview of what is currently known about the microbes associated with different foods, and compares traditional forms of food preparation with current industrial techniques in terms of the potential loss of microbial diversity. The chapters in Part 2 explore the oral microbiota as a microbial gatekeeper and main contributor to the gut microbiota. Part 3 introduces beneficial modulators of the gut microbiome starting with the establishment of a healthy gut microbiota during infancy, and continuing with the role of probiotics and prebiotics in health preservation and the imbalances of the gut microbiota. In the final section the editors offer concluding remarks and provide a view of the future brought by the microbiome research revolution.This study is unique in its emphasis on the convergence of two very relevant fields of research: the field of studies on Lactic Acid Bacteria (LAB) and fermented foods, and microbiome research. The relationship between these fields, as presented by the research in this volume, demonstrates the intimate connection between fermented foods, the oral and gut microbiota, and human health. Although research has been done on the impact of diet on the gut microbiome there are no publications addressing the restorative role of food as microbe provider to the gut microbiota. This novel approach makes the edited volume a key resource for scientific researchers working in this field.
How Flavor Works
by Jung H. Han Nak-Eon ChoiTaste is the number one driving force in the decision to purchase a food product and food consumption is the most critical function for living organisms to obtain the energy and resources essential to their vitality. Flavor and aroma are therefore universally important concepts: intrinsic to human well-being and pleasure, and of huge significance for the multi-trillion dollar global food business.How Flavor Works: the Science of Taste and Aroma offers a fascinating and accessible primer on the concepts of flavor science for all who have an interest in food and related topics. Professionals and students of food science and technology who do not already specialize in flavor science will find it a valuable reference on a topic crucial to how consumers perceive and enjoy food products. In this regard, it will also be of interest to product developers, marketers and food processors. Other readers with a professional (eg culinary and food service) or personal interest in food will also find the book interesting as it provides a user-friendly account of the mechanisms of flavor and aroma which will provide new insights into their craft.
How Free Cationic Polymer Chains Promote Gene Transfection
by Yue YananIn this PhD thesis, Yue Yanan addresses a long-overlooked and critical question in the development of non-viral vectors for gene delivery. The author determines that those uncomplexed and cationic polymer chains free in the solution mixture of polymer and DNA facilitate and promote gene transfection. Furthermore, by using a combination of synthetic chemistry, polymer physics and molecular biology, Yue confirms that it is those cationic polymer chains free in the solution mixture, rather than those bound to DNA chains, that play a decisive role in intracellular trafficking. Instead of the previously proposed and widely accepted "proton sponge" model, the author's group propose a new hypothesis based on the results of several well-designed and decisive experiments. These results show that free polycationic chains with a length of more than ~10 nm are able to partially block the fusion between different endocytic vesicles, including the endocytic-vesicle-to-endolysosome pathway. This thesis is highly original and its results greatly deepen our understanding of polymer-mediated gene transfection. More importantly, it provides new insights into the rational design of next-generation superior polymeric gene-delivery vectors.
How Fuzzy Concepts Contribute to Machine Learning (Studies in Fuzziness and Soft Computing #416)
by Vicenç Torra Mahdi Eftekhari Adel Mehrpooya Farid Saberi-MovahedThis book introduces some contemporary approaches on the application of fuzzy and hesitant fuzzy sets in machine learning tasks such as classification, clustering and dimension reduction. Many situations arise in machine learning algorithms in which applying methods for uncertainty modeling and multi-criteria decision making can lead to a better understanding of algorithms behavior as well as achieving good performances. Specifically, the present book is a collection of novel viewpoints on how fuzzy and hesitant fuzzy concepts can be applied to data uncertainty modeling as well as being used to solve multi-criteria decision making challenges raised in machine learning problems. Using the multi-criteria decision making framework, the book shows how different algorithms, rather than human experts, are employed to determine membership degrees. The book is expected to bring closer the communities of pure mathematicians of fuzzy sets and data scientists.
How Glass Changed the World
by Seth C. RasmussenGlass production is thought to date to ~2500 BC and had found numerous uses by the height of the Roman Empire. Yet the modern view of glass-based chemical apparatus (beakers, flasks, stills, etc.) was quite limited due to a lack of glass durability under rapid temperature changes and chemical attack. This "brief" gives an overview of the history and chemistry of glass technology from its origins in antiquity to its dramatic expansion in the 13th century, concluding with its impact on society in general, particularly its effect on chemical practices.
How Green are Electric or Hydrogen-Powered Cars?
by Jesús Montoya Sánchez de Pablo María Miravalles López Antoine BretHave you ever wondered by how much CO2 emissions can be reduced by running cars electrically or with hydrogen as fuel? This Brief provides a quantitative answer to this question using the example of the combined road traffic in Spain. The authors calculate the resulting greenhouse gas (GHG) emissions for the production of hydrogen gas or the required electricity and installing and maintaining the necessary infrastructure. In this way, they can compare with the GHG emissions in the present situation of oil fueled cars. Using different scenarios, they obtain an assessment how much 'greener' the electric or hydrogen cars can get. The method described in this Brief is scalable and readily adaptable to other countries. It can thus be used for investigating sensible approaches and developing recommendations for a conversion. As expected, the results depend strongly on the production scenarios for hydrogen or electricity production. The wrong choice can even result in increased GHG emissions. A proper choice of the roadmap toward a more sustainable and greener future is of greatest importance - the results described in this Brief can serve as a valuable and useful guide on our way.
How I Learned to Understand the World: BBC RADIO 4 BOOK OF THE WEEK
by Hans RoslingThis is a book that contains very few numbers. Instead, it is about meeting people who have opened my eyes.It was facts that helped him explain how the world works. But it was curiosity and commitment that made the late Hans Rosling, author of worldwide bestseller Factfulness, the most popular researcher of our time.How I Learned to Understand the World is Hans Rosling's own story of how a young scientist learned became a revolutionary thinker, and takes us from the swelter of an emergency clinic in Mozambique, to the World Economic Forum at Davos. In collaboration with Swedish journalist Fanny Härgestam, Hans Rosling wrote his memoir with the same joy of storytelling that made a whole world listen when he spoke.
How I Learned to Understand the World: BBC RADIO 4 BOOK OF THE WEEK
by Hans RoslingThis is a book that contains very few numbers. Instead, it is about meeting people who have opened my eyes.It was facts that helped him explain how the world works. But it was curiosity and commitment that made the late Hans Rosling, author of worldwide bestseller Factfulness, the most popular researcher of our time.How I Learned to Understand the World is Hans Rosling's own story of how a young scientist learned became a revolutionary thinker, and takes us from the swelter of an emergency clinic in Mozambique, to the World Economic Forum at Davos. In collaboration with Swedish journalist Fanny Härgestam, Hans Rosling wrote his memoir with the same joy of storytelling that made a whole world listen when he spoke.(P) 2020 Hodder & Stoughton Ltd
How Infrastructure Works: Inside the Systems That Shape Our World
by Deb ChachraNAMED A BEST BOOK OF 2023 BY PUBLISHERS WEEKLY"Revelatory, superbly written, and pulsing with wisdom and humanity, How Infrastructure Works is a masterpiece.&” —Ed Yong, author of An Immense WorldA new way of seeing the essential systems hidden inside our walls, under our streets, and all around us Infrastructure is a marvel, meeting our basic needs and enabling lives of astounding ease and productivity that would have been unimaginable just a century ago. It is the physical manifestation of our social contract—of our ability to work collectively for the public good—and it consists of the most complex and vast technological systems ever created by humans. A soaring bridge is an obvious infrastructural feat, but so are the mostly hidden reservoirs, transformers, sewers, cables, and pipes that deliver water, energy, and information to wherever we need it. When these systems work well, they hide in plain sight. Engineer and materials scientist Deb Chachra takes readers on a fascinating tour of these essential utilities, revealing how they work, what it takes to keep them running, just how much we rely on them—but also whom they work well for, and who pays the costs. Across the U.S. and elsewhere, these systems are suffering from systemic neglect and the effects of climate change, becoming unavoidably visible when they break down. Communities that are already marginalized often bear the brunt of these failures. But Chachra maps out a path for transforming and rebuilding our shared infrastructure to be not just functional but also equitable, resilient, and sustainable. The cost of not being able to rely on these systems is unthinkably high. We need to learn how to see them—and fix them, together—before it&’s too late.
How Innovation Works: And Why It Flourishes in Freedom
by Matt RidleyBuilding on his national bestseller The Rational Optimist, Matt Ridley chronicles the history of innovation, and how we need to change our thinking on the subject.Innovation is the main event of the modern age, the reason we experience both dramatic improvements in our living standards and unsettling changes in our society. Forget short-term symptoms like Donald Trump and Brexit, it is innovation that will shape the twenty-first century. Yet innovation remains a mysterious process, poorly understood by policy makers and businessmen alike.Matt Ridley argues that we need to see innovation as an incremental, bottom-up, fortuitous process that happens as a direct result of the human habit of exchange, rather than an orderly, top-down process developing according to a plan. Innovation is crucially different from invention, because it is the turning of inventions into things of practical and affordable use to people. It speeds up in some sectors and slows down in others. It is always a collective, collaborative phenomenon, involving trial and error, not a matter of lonely genius. It happens mainly in just a few parts of the world at any one time. It still cannot be modeled properly by economists, but it can easily be discouraged by politicians. Far from there being too much innovation, we may be on the brink of an innovation famine.Ridley derives these and other lessons from the lively stories of scores of innovations, how they started and why they succeeded or failed. Some of the innovation stories he tells are about steam engines, jet engines, search engines, airships, coffee, potatoes, vaping, vaccines, cuisine, antibiotics, mosquito nets, turbines, propellers, fertilizer, zero, computers, dogs, farming, fire, genetic engineering, gene editing, container shipping, railways, cars, safety rules, wheeled suitcases, mobile phones, corrugated iron, powered flight, chlorinated water, toilets, vacuum cleaners, shale gas, the telegraph, radio, social media, block chain, the sharing economy, artificial intelligence, fake bomb detectors, phantom games consoles, fraudulent blood tests, hyperloop tubes, herbicides, copyright, and even life itself.
How Insurgencies End
by Martin C. Libicki Ben ConnableRAND studied 89 modern insurgency cases to test conventional understanding about how insurgencies end. Findings relevant to policymakers and analysts include that modern insurgencies last about ten years; withdrawal of state support cripples insurgencies; civil defense forces are useful for both sides; pseudodemocracies fare poorly against insurgents; and governments win more often in the long run.
How Knowledge Moves: Writing the Transnational History of Science and Technology
by John KrigeKnowledge matters, and states have a stake in managing its movement to protect a variety of local and national interests. The view that knowledge circulates by itself in a flat world, unimpeded by national boundaries, is a myth. The transnational movement of knowledge is a social accomplishment, requiring negotiation, accommodation, and adaptation to the specificities of local contexts. This volume of essays by historians of science and technology breaks the national framework in which histories are often written. Instead, How Knowledge Moves takes knowledge as its central object, with the goal of unraveling the relationships among people, ideas, and things that arise when they cross national borders. This specialized knowledge is located at multiple sites and moves across borders via a dazzling array of channels, embedded in heads and hands, in artifacts, and in texts. In the United States, it shapes policies for visas, export controls, and nuclear weapons proliferation; in Algeria, it enhances the production of oranges by colonial settlers; in Vietnam, it facilitates the exploitation of a river delta. In India it transforms modes of agricultural production. It implants American values in Latin America. By concentrating on the conditions that allow for knowledge movement, these essays explore travel and exchange in face-to-face encounters and show how border-crossings mobilize extensive bureaucratic technologies.
How Mechanics Shaped the Modern World: A Contextual Introduction to Concepts and Applications
by David H. AllenThis updated and augmented second edition covers the history of mechanics in such a way as to explain how this all-important discipline shaped our world. Like the first edition, Dr. Allen presents the material in an engaging, accessible manner, with many historic insights and thorough explanations of attending concepts. The text retains its coverage of classical mechanics, essentially Newtonian mechanics, and adds chapters on three additional topics that go well beyond classical mechanics: relativity, quantum/nanomechanics, and biomechanics.
How Much Energy Does Your Building Use? (Doshorts Ser.)
by Kerry Mashford Liz ReasonWhy do award-winning "green" buildings so often have higher energy bills than ordinary buildings? Why do expensive refurbishments deliver outcomes that are far from the promises of improved sustainability? Why does your building have high running costs and still the occupants complain about being too cold or too hot and are otherwise dissatisfied?The failure of many countries to produce buildings that are comfortable with excellent energy performance is a scandal. Achieving low energy buildings does not involve learning rocket science: just some basic building physics, a clear language for talking meaningfully about energy-efficient outcomes with all those in the buildings cycle, and an outlook that casts a new low energy perspective on old problems. This book provides that common language. It outlines a path towards understanding what makes for a good quality low energy building, the stakeholders that need to be engaged, and encourages new ways of thinking about how to reduce energy use and costs.This book is for everyone in the buildings cycle, from CEOs of major construction companies to Sustainability, Energy, Environment, Facilities and Utilities managers in any company that aims to reduce energy use in a non-domestic building.
How Much Is Enough?
by K. Wayne Smith Alain C. EnthovenOriginally published in 1971, and now published with a new foreword, this is a book of enduring value and lasting relevance. The authors detail the application, history, and controversies surrounding the Planning, Programming, and Budgeting System (PPBS), used to evaluate military needs and to choose among alternatives for meeting those needs.
How Music Works: A Physical Culture Theory
by Rolf BaderHow do we understand culture and shape its future? How do we cross the bridge between culture as ideas and feelings and physical, cultural objects, all this within the endless variety and complexity of modern and traditional societies? This book proposes a Physical Culture Theory, taking culture as a self-organizing impulse pattern of electric forces. Bridging the gap to consciousness, the Physical Culture Theory proposes that consciousness content, what we think, hear, feel, or see is also just this: spatio-temporal electric fields. Music is a perfect candidate to elaborate on such a Physical Culture Theory. Music is all three, musical instrument acoustics, music psychology, and music ethnology. They emerge into living musical systems like all life is self-organization. Therefore the Physical Culture Theory knows no split between nature and nurture, hard and soft sciences, brains and musical instruments. It formulates mathematically complex systems as Physical Models rather than Artificial Intelligence. It includes ethical rules for maintaining life and finds culture and arts to be Human Rights. Enlarging these ideas and mathematical methods into all fields of culture, ecology, economy, or the like will be the task for the next decades to come.
How Nature Works: Complexity in Interdisciplinary Research and Applications
by Ali Sanayei Otto E. Rössler Hector Zenil Ivan ZelinkaThis book is based on the outcome of the "2012 Interdisciplinary Symposium on Complex Systems" held at the island of Kos. The book consists of 12 selected papers of the symposium starting with a comprehensive overview and classification of complexity problems, continuing by chapters about complexity, its observation, modeling and its applications to solving various problems including real-life applications. More exactly, readers will have an encounter with the structural complexity of vortex flows, the use of chaotic dynamics within evolutionary algorithms, complexity in synthetic biology, types of complexity hidden inside evolutionary dynamics and possible controlling methods, complexity of rugged landscapes, and more. All selected papers represent innovative ideas, philosophical overviews and state-of-the-art discussions on aspects of complexity. The book will be useful as instructional material for senior undergraduate and entry-level graduate students in computer science, physics, applied mathematics and engineering-type work in the area of complexity. The book will also be valuable as a resource of knowledge for practitioners who want to apply complexity to solve real-life problems in their own challenging applications. The authors and editors hope that readers will be inspired to do their own experiments and simulations, based on information reported in this book, thereby moving beyond the scope of the book.
How Not to Fail at Projects: Stopping the Project Management Insanity Spiral
by Claude H. MaleyThey say that repeating the same thing and expecting a different result is insanity. This book aims to analyze the reasons for failure in project management. It is filled with stories, anecdotes and satires that highlight how organizations and project managers fall into an “insanity spiral”. It provides seven Sanity Checks designed to keep project managers from repeating the same mistakes and to help them become project champions: The first sanity check is how and when to appoint a project manager. This first sanity check may be familiar and may well bring back memories of starting a career in project management. The second sanity check is the comprehension of why a project is needed. It helps to overcome the misunderstanding that many have on the nature of projects and its management. The third sanity check is the understanding of the unknown and emphasizes the importance of risk management. The fourth sanity check is capturing who needs what. It is about the constant pursuit to satisfy a host of individuals and at times the, sometimes seemingly, unsurmountable quest to secure resources for a project. The fifth sanity check is who does what. It also deals with satisfying stakeholders and obtaining resources. The sixth sanity check is outside assistance. It is all about breaking the us versus them syndrome when outsourcing in a project. The seventh and most important sanity check is engaging the efforts of others as it deals with people—the lifeblood of any organization. The book concludes with a chapter on composing and building powerful microservices. With the exponential growth of IoT devices, microservices are being developed and deployed on resource-constrained but resource-intensive devices in order to provide people-centric applications. The book discusses the challenges of these applications. Finally, the book looks at the role of microservices in smart environments and upcoming trends including ubiquitous yet disappearing microservices.
How Not to Network a Nation: The Uneasy History of the Soviet Internet
by Benjamin PetersBetween 1959 and 1989, Soviet scientists and officials made numerous attempts to network their nation -- to construct a nationwide computer network. None of these attempts succeeded, and the enterprise had been abandoned by the time the Soviet Union fell apart. Meanwhile, ARPANET, the American precursor to the Internet, went online in 1969. Why did the Soviet network, with top-level scientists and patriotic incentives, fail while the American network succeeded? In How Not to Network a Nation, Benjamin Peters reverses the usual cold war dualities and argues that the American ARPANET took shape thanks to well-managed state subsidies and collaborative research environments and the Soviet network projects stumbled because of unregulated competition among self-interested institutions, bureaucrats, and others. The capitalists behaved like socialists while the socialists behaved like capitalists. After examining the midcentury rise of cybernetics, the science of self-governing systems, and the emergence in the Soviet Union of economic cybernetics, Peters complicates this uneasy role reversal while chronicling the various Soviet attempts to build a "unified information network." Drawing on previously unknown archival and historical materials, he focuses on the final, and most ambitious of these projects, the All-State Automated System of Management (OGAS), and its principal promoter, Viktor M. Glushkov. Peters describes the rise and fall of OGAS -- its theoretical and practical reach, its vision of a national economy managed by network, the bureaucratic obstacles it encountered, and the institutional stalemate that killed it. Finally, he considers the implications of the Soviet experience for today's networked world.
How Not to Network a Nation: The Uneasy History of the Soviet Internet (Information Policy)
by Benjamin PetersHow, despite thirty years of effort, Soviet attempts to build a national computer network were undone by socialists who seemed to behave like capitalists.Between 1959 and 1989, Soviet scientists and officials made numerous attempts to network their nation—to construct a nationwide computer network. None of these attempts succeeded, and the enterprise had been abandoned by the time the Soviet Union fell apart. Meanwhile, ARPANET, the American precursor to the Internet, went online in 1969. Why did the Soviet network, with top-level scientists and patriotic incentives, fail while the American network succeeded? In How Not to Network a Nation, Benjamin Peters reverses the usual cold war dualities and argues that the American ARPANET took shape thanks to well-managed state subsidies and collaborative research environments and the Soviet network projects stumbled because of unregulated competition among self-interested institutions, bureaucrats, and others. The capitalists behaved like socialists while the socialists behaved like capitalists. After examining the midcentury rise of cybernetics, the science of self-governing systems, and the emergence in the Soviet Union of economic cybernetics, Peters complicates this uneasy role reversal while chronicling the various Soviet attempts to build a “unified information network.” Drawing on previously unknown archival and historical materials, he focuses on the final, and most ambitious of these projects, the All-State Automated System of Management (OGAS), and its principal promoter, Viktor M. Glushkov. Peters describes the rise and fall of OGAS—its theoretical and practical reach, its vision of a national economy managed by network, the bureaucratic obstacles it encountered, and the institutional stalemate that killed it. Finally, he considers the implications of the Soviet experience for today's networked world.
How Old Are You?
by Amy TaoWhen it’s your birthday, you add one Earth year to your age. Have you ever wondered how old you would be in Saturn years? What about Mars? Read on to learn about the planets of our solar system and how long it takes for them to complete one whole orbit.
How Oliver Olson Changed the World
by Claudia MillsAfraid he will always be an outsider like ex-planet Pluto, nine-year-old Oliver finally shows his extremely overprotective parents that he is capable of doing great things without their help while his class is studying the solar system.
How Round Is Your Circle?: Where Engineering and Mathematics Meet
by John Bryant Chris SangwinHow do you draw a straight line? How do you determine if a circle is really round? These may sound like simple or even trivial mathematical problems, but to an engineer the answers can mean the difference between success and failure. How Round Is Your Circle? invites readers to explore many of the same fundamental questions that working engineers deal with every day--it's challenging, hands-on, and fun. John Bryant and Chris Sangwin illustrate how physical models are created from abstract mathematical ones. Using elementary geometry and trigonometry, they guide readers through paper-and-pencil reconstructions of mathematical problems and show them how to construct actual physical models themselves--directions included. It's an effective and entertaining way to explain how applied mathematics and engineering work together to solve problems, everything from keeping a piston aligned in its cylinder to ensuring that automotive driveshafts rotate smoothly. Intriguingly, checking the roundness of a manufactured object is trickier than one might think. When does the width of a saw blade affect an engineer's calculations--or, for that matter, the width of a physical line? When does a measurement need to be exact and when will an approximation suffice? Bryant and Sangwin tackle questions like these and enliven their discussions with many fascinating highlights from engineering history. Generously illustrated, How Round Is Your Circle? reveals some of the hidden complexities in everyday things.
How Safe is Safe Enough?: Technological Risks, Real and Perceived
by E. E. LewisEvery time an airplane crashes, a gas line explodes, a bridge collapses, or a contaminant escapes the public questions whether the benefits that technology brings are worth its risks. Written in laymen's language, How Safe Is Safe Enough? explores the realities of the risks that technology presents and the public's perceptions of them. E. E. Lewis examines how these perceptions are reconciled with economic interests and risk assessors' analyses in messy and often contentious political processes that determine acceptable levels of safety-levels that often depend more on the perceived nature of the risks than on the number of deaths or injuries that they cause. The author explains why things fail and why design necessitates tradeoffs between performance, cost, and safety. He details methods for identifying and eliminating design flaws and illustrates the consequences when they fail. Lewis examines faulty machine interfaces that cause disastrous human errors and highlights how cost cutting and maintenance neglect have led to catastrophic consequence.How Safe Is Safe Enough? explores how society determines adequate levels of safety, outlining the announcement and enforcement of safety regulations and addressing controversies surrounding cost-benefit analysis. The author argues that large regulatory effects stem from the public's wide-ranging perceptions of three classes of accidents: the many everyday accidents causing one or two deaths at a time, rare disasters causing large loss of life, and toxic releases leading to uncertain future health risks. The nuclear disaster at Fukushima culminates the discussion, exemplifying the dichotomies faced in reconciling professional risk assessors' statistical approaches with the citizenry's fears and perceptions. For better or worse, technology permeates our lives, and much of it we don't understand-how it works and what the chances are that it will fail dangerously. Such interest and concerns are at the heart of this authoritative, provocative analysis.