Doctor Ecco S Cyberpuzzles 36 Puzzles For Hackers And Other Mathematical Detectives

"Dennis Shasha is the absolute best puzzle writer alive."—David Gelernter, professor of computer science, Yale University In the tradition of Sherlock Holmes, Dr. Ecco is one of the greatest sleuths of our time, a mathematical wizard who uses logic and computer programming to solve crimes, find treasures, and explore space. Join his team, expand the frontiers of your knowledge, and match wits with him on intriguing cases like "The Virus from the Spy" and "The Secrets of Space" and "The Caribou and the Gas." The puzzles collected here require no formal background beyond arithmetic and elementary algebra—just lively curiosity and keen intelligence. With thirty-six illustrated cases organized around eight major mathematical themes (from Combinatorial Geometry and Geography to Ciphers and Secrecy) this book will encourage you to use your mind and your computer in ways you never previously imagined.

Dr. Ecco and his companions encounter a variety of mathematical and logical puzzles organized around eight mathematical themes, including combinatorial geometry, routing and networks, ciphers, and pattern mathematics.

Covers the writing process, the structure of essays, exposition, sentences, diction, description, narration, and punctuation.

Algorithmic puzzles are puzzles involving well-defined procedures for solving problems. This book will provide an enjoyable and accessible introduction to algorithmic puzzles that will develop the reader's algorithmic thinking. The first part of this book is a tutorial on algorithm design strategies and analysis techniques. Algorithm design strategies — exhaustive search, backtracking, divide-and-conquer and a few others — are general approaches to designing step-by-step instructions for solving problems. Analysis techniques are methods for investigating such procedures to answer questions about the ultimate result of the procedure or how many steps are executed before the procedure stops. The discussion is an elementary level, with puzzle examples, and requires neither programming nor mathematics beyond a secondary school level. Thus, the tutorial provides a gentle and entertaining introduction to main ideas in high-level algorithmic problem solving. The second and main part of the book contains 150 puzzles, from centuries-old classics to newcomers often asked during job interviews at computing, engineering, and financial companies. The puzzles are divided into three groups by their difficulty levels. The first fifty puzzles in the Easier Puzzles section require only middle school mathematics. The sixty puzzle of average difficulty and forty harder puzzles require just high school mathematics plus a few topics such as binary numbers and simple recurrences, which are reviewed in the tutorial. All the puzzles are provided with hints, detailed solutions, and brief comments. The comments deal with the puzzle origins and design or analysis techniques used in the solution. The book should be of interest to puzzle lovers, students and teachers of algorithm courses, and persons expecting to be given puzzles during job interviews.

DIVThe heroic Dr. Ecco uncovers a fiendish plot in this collection of original puzzles inspired by research methods of computer science and mathematics. No sophisticated mathematical background necessary. Solutions. /div

One of America’s most distinguished military historians offers the definitive account of the greatest tank battle of World War II—an epic clash of machines and men that matched the indomitable will of the Soviet Red Army against the awesome might of the Nazi Wehrmacht. While the Battle of Kursk has long captivated World War II aficionados, it has been unjustly overlooked by historians. Drawing on the masses of new information made available by the opening of the Russian military archives, Dennis Showalter at last corrects that error. This battle was the critical turning point on World War II’s Eastern Front. In the aftermath of the Red Army’s brutal repulse of the Germans at Stalingrad, the stakes could not have been higher. More than three million men and eight thousand tanks met in the heart of the Soviet Union, some four hundred miles south of Moscow, in an encounter that both sides knew would reshape the war. The adversaries were at the peak of their respective powers. On both sides, the generals and the dictators they served were in agreement on where, why, and how to fight. The result was a furious death grapple between two of history’s most formidable fighting forces—a battle that might possibly have been the greatest of all time. In Armor and Blood, Showalter re-creates every aspect of this dramatic struggle. He offers expert perspective on strategy and tactics at the highest levels, from the halls of power in Moscow and Berlin to the battlefield command posts on both sides. But it is the author’s exploration of the human dimension of armored combat that truly distinguishes this book. In the classic tradition of John Keegan’s The Face of Battle, Showalter’s narrative crackles with insight into the unique dynamics of tank warfare—its effect on men’s minds as well as their bodies. Scrupulously researched, exhaustively documented, and vividly illustrated, this book is a chilling testament to man’s ability to build and to destroy. When the dust settled, the field at Kursk was nothing more than a wasteland of steel carcasses, dead soldiers, and smoking debris. The Soviet victory ended German hopes of restoring their position on the Eastern Front, and put the Red Army on the road to Berlin. Armor and Blood presents readers with what will likely be the authoritative study of Kursk for decades to come. Advance praise for Armor and Blood “The size and the brutality of the vast tank battle at Kursk appalls, this struggle that gives an especially dark meaning to that shopworn phrase ‘last full measure.’ Prepare yourself for a wild and feverish ride over the steppes of Russia. You can have no better guide than Dennis E. Showalter, who speaks with an authority equaled by few military historians.”—Robert Cowley, founding editor of MHQ: The Quarterly Journal of Military History “A fresh, skillful, and complete synthesis of recent revelations about this famous battle . . . As a myth buster, Armor and Blood is a must-read for those interested in general and military history.”—David M. Glantz, editor of The Journal of Slavic Military Studies “Refreshingly crisp, pointed prose . . . Throughout, [Showalter] demonstrates his adeptness at interweaving discussions of big-picture strategy with interesting revelations and anecdotes. . . . Showalter does his best work by keeping his sights set firmly on the battle at hand, while also parsing the conflict for developments that would have far-reaching consequences for the war.”—Publishers Weekly

Now updated, this quick-reference provides practical, evidence-based recommendations for nutrition of healthy individuals, nutritional support of hospitalized patients, and dietary management of patients with diabetes, renal disease, cancer, and AIDS.