Mark Denny

five machines that changed the world

Ingenium

For study or hobby, Their Arrows Will Darken the Sun is an entertaining guide to the world of ballistics.

The Evolution and Science of Ballistics

Their Arrows Will Darken the Sun

How do whirligig beetles use ripples as a form of sonar, and why can't mosquitoes detect the electrical activity of their prey as sharks can? Readers of Air and Water will be well rewarded by thinking about these and other questions in the context of physics.

The Biology and Physics of Life's Media

Air and Water

Alan McFadzean

This is a book about rocket science: what it is and what it does. From the earliest fireworks to nuclear-powered spacecraft, all you would ever want or need to know about the subject is here, along with a straightforward explanation of how, why and when things work—or sometimes don't. We begin with the history and workings of early terrestrial rocketry before moving onto the main subject of the book: how we get things into space and, on occasion, back again. Entirely math-free, the chapters weave together innumerable anecdotes, real-world examples, and easy walk-throughs to help readers break down the complex physics behind some of humankind’s most amazing feats. Neither a pure textbook nor a populist space travel tome, the book will educate, inform and above all entertain anyone intrigued by rocket science.

From Fireworks to the Photon Drive

Rocket Science

A physics-driven exploration of sports played on ice and snow that is truly fun and informative, Gliding for Gold is the perfect primer for understanding the science behind cold weather athletics.

The Physics of Winter Sports

Gliding for Gold

Have you ever wondered how stealth planes achieve "invisibility," how sunken ships are found, or how fishermen track schools of fish in vast expanses of ocean? Radar and sonar echolocation—a simple matter of sending, receiving, and processing signals. Weaving history with simple science, Mark Denny deftly reveals the world of radar and sonar to the curious reader, technology buff, and expert alike. He begins with an early history of the Chain Home radar system used during World War II and then provides accessible and engaging explanations of the physics that make signal processing possible. Basic diagrams and formulas show how electromagnetic and sound waves are transmitted, received, and converted into images, allowing you to literally see in the dark. A section on bioacoustic echolocation, with a focus on the superior sonar systems of bats and whales and a discussion of the advanced technology of next-generation airborne signal processors, opens the imagination to fascinating possibilities for the future.

Making Sense of Radar and Sonar

Blip, Ping, and Buzz

Addressing general readers and biologists, Mark Denny shows how the physics of fluids (in this case, air and water) influences the often fantastic ways in which life forms adapt themselves to their terrestrial or aquatic "media."

Steven Gaines

Life is a chancy proposition: from the movement of molecules to the age at which we die, chance plays a key role in the natural world. Traditionally, biologists have viewed the inevitable "noise" of life as an unfortunate complication. The authors of this book, however, treat random processes as a benefit. In this introduction to chance in biology, Mark Denny and Steven Gaines help readers to apply the probability theory needed to make sense of chance events--using examples from ocean waves to spiderwebs, in fields ranging from molecular mechanics to evolution. Through the application of probability theory, Denny and Gaines make predictions about how plants and animals work in a stochastic universe. Is it possible to pack a variety of ion channels into a cell membrane and have each operate at near-peak flow? Why are our arteries rubbery? The concept of a random walk provides the necessary insight. Is there an absolute upper limit to human life span? Could the sound of a cocktail party burst your eardrums? The statistics of extremes allows us to make the appropriate calculations. How long must you wait to see the detail in a moonlit landscape? Can you hear the noise of individual molecules? The authors provide answers to these and many other questions. After an introduction to the basic statistical methods to be used in this book, the authors emphasize the application of probability theory to biology rather than the details of the theory itself. Readers with an introductory background in calculus will be able to follow the reasoning, and sets of problems, together with their solutions, are offered to reinforce concepts. The use of real-world examples, numerous illustrations, and chapter summaries--all presented with clarity and wit--make for a highly accessible text. By relating the theory of probability to the understanding of form and function in living things, the authors seek to pique the reader's curiosity about statistics and provide a new perspective on the role of chance in biology.

Using Probability to Explore Nature

Chance in Biology

A deep dive into pivotal technological advances in areas from warfare to time measurement. “A wonderful combination of history and physics.” —Mark Kidger, author of Astronomical Enigmas Ingenium is medieval English vernacular for “an ingenious contrivance.” In this fascinating book, physicist Mark Denny considers five such contrivances—the bow and arrow, the waterwheel, the counterpoise siege engine (including the trebuchet), the pendulum clock anchor escapement, and the centrifugal governor—and demonstrates how they literally changed the world. Interweaving an entertaining narrative with diagrams, equations, and drawings, Denny shares the history of each device, explains the physics behind it, and describes how it was used, how it evolved, and why it is significant in today’s world. Consider the bow and arrow, which transformed warfare by allowing soldiers to attack their enemies at a safe distance. Or the waterwheel, which enabled Old World civilizations to grind grain, pump water, and power machines during a period of extreme labor shortages. Medieval warriors engaged in an early form of biological warfare by using the trebuchet to launch dead animals or plague-ridden corpses over enormous fortress walls. The pendulum clock forever enslaved modern humans to the clock by linking the accurate measure of time to the burdens of schedules, deadlines, promptness, and tardiness. And the centrifugal governor gave rise to an entire branch of modern engineering science: feedback control. Reflecting on the inventors of these ancient machines and the times in which they lived, Denny concludes with thought-provoking observations about inventors, inventiveness, genius, and innovation. Whether you dream of making a better mousetrap or launching pumpkins into the stratosphere, Ingenium will tickle your fancy.

Five Machines That Changed the World

"Denny details the evolution of navigation from the days of coastal piloting to GPS and other modern-day technologies. He explains the scientific breakthroughs in accessible, amusing terms and provides an insightful look at their effects on societies, cultures and human advancement." -- Back cover.

From Dead Reckoning to GPS

The Science of Navigation

An introduction to marine science, this text teaches readers how to think about the ocean - its biology, mechanics, and conservation.

An Introduction to Oceanography

How the Ocean Works

The world's oceans account for roughly 71 percent of the planet's surface and 99 percent of its livable volume. Any study of this huge habitat requires a solid foundation in the principles that underlie marine biology and physical and chemical oceanography, yet until now undergraduate textbooks have largely presented compilations of facts rather than explanations of principles. How the Ocean Works fills this gap, providing a concise and accessible college-level introduction to marine science that is also ideal for general readers. How are winds and currents driven? What is the dilemma of the two-layered ocean? Mark Denny explains key concepts like these in rich and fascinating detail. He explores early scientific knowledge of oceans, photosynthesis, trophic interactions and energy flow, and the impacts of human activities on marine and atmospheric systems. Focusing each chapter on a major topic and carefully explaining the principles and theory involved, Denny gives readers the conceptual building blocks needed to develop a coherent picture of the living ocean. How the Ocean Works is an indispensable resource that teaches readers how to think about the ocean--its biology, mechanics, and conservation. Provides a concise, up-to-date introduction to marine science Develops the conceptual basis needed to understand how the ocean works Explains fundamental principles and theory Includes color illustrations and informative diagrams Serves as a college textbook and a reference for general readers Some images inside the book are unavailable due to digital copyright restrictions.

From an engineer’s perspective, how do specialized adaptations among living things really work? Writing with wit and a richly informed sense of wonder, Denny and Alan offer an expert look at animals—including humans—as works of evolutionary engineering, each exquisitely adapted to a specific manner of survival.

Engineering Animals

Ever since Nobel Prize–winning atmospheric chemist Paul Crutzen coined the term "Anthropocene" to describe our current era—one in which human impact on the environment has pushed Earth into an entirely new geological epoch—arguments for and against the new designation have been raging. Finally, an official working group of scientists was created to determine once and for all whether we humans have tossed one too many plastic bottles out the car window and wrought a change so profound as to be on par with the end of the last ice age. In summer 2016, the answer came back: Yes. In Making the Most of the Anthropocene, scientist Mark Denny tackles this hard truth head-on and considers burning questions: How did we reach our present technological and ecological state? How are we going to cope with our uncertain future? Will we come out of this, or are we doomed as a species? Is there anything we can do about what happens next? This book • explains what the Anthropocene is and why it is important • offers suggestions for minimizing harm instead of fretting about an impending environmental apocalypse • combines easy-to-grasp scientific, technological, economic, and anthropological analyses In Making the Most of the Anthopocene, there are no equations, no graphs, and no impenetrable jargon. Instead, you'll find a fascinating cast of characters, including journalists from outer space, peppered moths, and unjustly maligned Polynesians. In his bright, lively voice, Denny envisions a future that balances reaction and reason, one in which humanity emerges bloody but unbowed—and in which those of us who are prepared can make the most of the Anthropocene.

Facing the Future

Making the Most of the Anthropocene

Whether you are an inquisitive landlubber who has never set foot in a boat, a casual weekend sailor, or an old salt who lives for the sea, Float Your Boat! is an accessible guide to the physics of sailing.

Mark Denny

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