Providing a concise introduction to abstract algebra, this work unfolds some of the fundamental systems with the aim of reaching applicable, significant results.

    In this unconventional introduction, physicist Leonard Susskind and hacker-scientist George Hrabovsky offer a first course in physics and associated math for the ardent amateur. Unlike most popular physics books—which give readers a taste of what physicists know but shy away from equations or math—Susskind and Hrabovsky actually teach the skills you need to do physics, beginning with classical mechanics, yourself. Based on Susskind's enormously popular Stanford University-based (and YouTube-featured) continuing-education course, the authors cover the minimum—the theoretical minimum of the title—that readers need to master to study more advanced topics.An alternative to the conventional go-to-college method, The Theoretical Minimum provides a tool kit for amateur scientists to learn physics at their own pace.

    The gear you select and how you use it can mean big results—or bigger disappointment.FASTER takes a scientific look at triathlon to see what truly makes you faster—and busts the myths and doublespeak that waste your money and race times. In this fascinating exploration of the forces at play in the swim-bike-run sport, astronautical engineer and triathlete Jim Gourley shows where to find free speed, speed on a budget, and the gear upgrades that are worth it.FASTER offers specific, science-based guidance on the fastest techniques and the most effective gear, answering questions like: •    Which wetsuit is best for me? •    What’s the best way to draft a swimmer? •    Should I buy a lighter bike? •    Deep dish or disc wheels? •    Are lighter shoes faster? •    Who’s right about running technique? Gourley reviews published studies in peer-reviewed journals to show what scientists have learned about swim drafting, pacing the bike leg, race strategy for short and long-course racing, and the fastest ways to handle transitions.FASTER will change how you think about your body, your gear, and the world around you. With science on your side, you'll make the smart calls that will make you a better, faster triathlete.

    From shopping, to even getting information on flight times, to even tracking when to walk your dog, Alexa can do this. With over 23,000 skills and more being developed each day, Alexa is here to stay and is here to help you. But what can you do with Alexa? What are some of the abilities of Alexa that you can engage in, some that you can use to truly benefit yourself and others? Well, you’re about to find out. Here is a preview of what you'll learn: All of the different Echo devices and what they entail Various tips on how to use them all Tips to use the various features, including shopping Troubleshooting tips in order to have the best Amazon Echo experience Why you might consider getting one over another The capabilities of Alexa, including a whole slew of various things you can inquire from Alexa A comprehensive list of 1001 things to do with Alexa, including valuable tips and tricks You can become the Echo master that you know you can be, and this book is just the beginning of it all. With this, you’ll be able to control your Echo in the way that it’s meant to be, in the ways that you want it to be, and the different natures of this. Become the person that you want to be today, and make sure that you learn about your Echo, since you truly won’t regret it the moment you begin to use it, and you’ll master it even more with every interaction.

    The algorithms you'll use most often as a programmer have already been discovered, tested, and proven. If you want to take a hard pass on Knuth's brilliant but impenetrable theories and the dense multi-page proofs you'll find in most textbooks, this is the book for you. This fully-illustrated and engaging guide makes it easy for you to learn how to use algorithms effectively in your own programs.Grokking Algorithms is a disarming take on a core computer science topic. In it, you'll learn how to apply common algorithms to the practical problems you face in day-to-day life as a programmer. You'll start with problems like sorting and searching. As you build up your skills in thinking algorithmically, you'll tackle more complex concerns such as data compression or artificial intelligence. Whether you're writing business software, video games, mobile apps, or system utilities, you'll learn algorithmic techniques for solving problems that you thought were out of your grasp. For example, you'll be able to:Write a spell checker using graph algorithmsUnderstand how data compression works using Huffman codingIdentify problems that take too long to solve with naive algorithms, and attack them with algorithms that give you an approximate answer insteadEach carefully-presented example includes helpful diagrams and fully-annotated code samples in Python. By the end of this book, you will know some of the most widely applicable algorithms as well as how and when to use them.

    This supplement will cater to the requirements of students by covering all important topics of Laplace transformation, Matrices, Numerical Methods. Further enhanced is its usability by inclusion of chapter end questions in sync with student needs. Table of contents: 1. Basic Concepts 2. An Introduction to Modeling and Qualitative Methods 3. Classification of First-Order Differential Equations 4. Separable First-Order Differential Equations 5. Exact First-order Differential Equations 6. Linear First-Order Differential Equations 7. Applications of First-Order Differential Equations 8. Linear Differential Equations: Theory of Solutions 9. Second-Order Linear Homogeneous Differential Equations with Constant Coefficients 10. nth-Order Linear Homogeneous Differential Equations with Constant Coefficients 11. The Method of Undetermined Coefficients 12. Variation of Parameters 13. Initial-Value Problems for Linear Differential Equations 14. Applications of Second-Order Linear Differential Equations 15. Matrices 16. eAt 17. Reduction of Linear Differential Equations to a System of First-Order Equations 18. Existence and Uniqueness of Solutions 19. Graphical and Numerical Methods for Solving First-Order Differential Equations 20. Further Numerical Methods for Solving First-Order Differential Equations 21. Numerical Methods for Solving Second-Order Differential Equations Via Systems 22. The Laplace Transform 23. Inverse Laplace Transforms 24. Convolutions and the Unit Step Function 25. Solutions of Linear Differential Equations with Constant Coefficients by Laplace Transforms 26. Solutions of Linear?Systems by Laplace Transforms 27. Solutions of Linear Differential Equations with Constant Coefficients by Matrix Methods 28. Power Series Solutions of Linear Differential Equations with Variable Coefficients 29. Special Functions 30. Series Solutions N

    This hilarious 233 page full-color book contains over 400 of cartoonist, Chad Carpenter's latest comic creations. Consisting of anything animal, vegetable or mineral, but with a decidedly outdoorsy slant, this award-winning comic strip takes an offbeat view of the woodsy side of life. Find out for yourself why TUNDRA is one of the fastest-growing comic strips on the planet!

    Elite organizations such as army special forces, SWAT teams , the marines and more, all require a minimum amount of pull-ups as a prerequisite for anyone to join their training programs.But, although pull-ups target first of all the back, you usually end up feeling them only on your arms, right? Heck, your neck feels tense every time you perform them and you wonder what you are doing wrong.The truth is that there is more to pull ups than just lifting yourself up and down from a bar. It's quite common for people to be doing a ton of reps without any impressive results. This book will first of all teach you that you have to bring your reps down while polishing your technique. "Huh? Lower my reps? Isn't that bad for building muscle?"When it comes to pull-ups, no it's not. Pull-ups are a completely different animal than most of the exercises out there. Eight good reps are better than fifteen crappy ones as you will learn.Doing your reps the wrong way can have you wondering why your back doesn't grow. Learn to do them the right way and people will go "Damn!" when they see you topless. How to Carve a Gymnast's Back with Pull Ups gives you all the tools you will ever need in order to turn this exercise into the muscle building monster it really is. There are 6 techniques in the book to help you maximize the muscle growth of your back during pull ups:1.Learn how to activate your lats. First you got to feel your lats before even starting to do a single rep. That way you make every rep count and you also release tension from your neck and shoulders.2.Switch your back muscles on before you pull. This is a middle step between hanging and pulling and many people neglect it along with the extra back activation it provides. 3.Lift yourself up without excessively using your arms. Ever felt your biceps and forearms pumped up from pull ups but not your back? By having your elbows close to your ribs as you pull, you can say hello to your new, pumped back!4.Bring your chest to the bar for maximum contraction of the lats. Ninety-nine out of a hundred people can't do this and their back growth clearly indicates it. This is the technique that takes your back from "meh, OK" to "WOW!".5.Control your body on the way down. An uncontrollable rep is a rep wasted. You damage your joints and even miss on extra back growth.6.Visualize your lats contracting. This is the cherry on top of the cake and you get to eat it too. Internal cues like visualizing have helped many people increase exercise performance and you can now do the same with your pull ups.You can start performing these techniques immediately, wherever you are and begin witnessing your back become as powerful and muscular as an Olympic Gymnast's. Don’t hesitate to pick up your copy today by clicking the BUY NOW button at the top of this page! P.S. Don't blame me when people start complaining that you're blocking their sun once you master these techniques.. You've been warned.

    In this first installment of the “Jake Stryker” series, Warren has created a fast paced and riveting story that you could imagine reading in today’s headlines. Here are a few testimonials: “Fast paced thriller in keeping with Vince Flynn and Brad Thor.” Captain Mike Penn Chief Pilot Southwest Airlines Decorated Navy Fighter Pilot and POW “A spider web of plots, covert action, and dead bad guys!” Ryan “Birdman” Parrott Exec. Dir., Sons of the Flag, Burn Foundation Former US Navy SEAL, SEAL Team 7 Jake Stryker, one of the US Army’s lethal and highly trained Delta Force Operators, suspects leaks of classified information that lead to the death of his team in Afghanistan. When his tour of duty ends, Stryker returns to the United States to locate and punish those responsible. While investigating these leaks, he crosses paths with Rachel Cohen, a beautiful but deadly Mossad agent. While their goals appear to be vastly different with Stryker pursuing government leaks and Rachel chasing an Iranian terrorist, they form an unlikely union. What they uncover is a network of corruption that leads them directly to the White House.

    Children are interested in things like where do certain animal come from and where does the rain come from. Children are also interested in the sky and how far away it is from the ground. Nature will also teach children how animals and insects get their food. This will force children to paint a picture of this in their mind. This picture will become real to children of all ages.

    We often overlook the historical link between mathematics and technological advances, says Stewart—but this connection is integral to any complete understanding of human history.Equations are modeled on the patterns we find in the world around us, says Stewart, and it is through equations that we are able to make sense of, and in turn influence, our world. Stewart locates the origins of each equation he presents—from Pythagoras's Theorem to Newton's Law of Gravity to Einstein's Theory of Relativity—within a particular historical moment, elucidating the development of mathematical and philosophical thought necessary for each equation's discovery. None of these equations emerged in a vacuum, Stewart shows; each drew, in some way, on past equations and the thinking of the day. In turn, all of these equations paved the way for major developments in mathematics, science, philosophy, and technology. Without logarithms (invented in the early 17th century by John Napier and improved by Henry Briggs), scientists would not have been able to calculate the movement of the planets, and mathematicians would not have been able to develop fractal geometry. The Wave Equation is one of the most important equations in physics, and is crucial for engineers studying the vibrations in vehicles and the response of buildings to earthquakes. And the equation at the heart of Information Theory, devised by Claude Shannon, is the basis of digital communication today.An approachable and informative guide to the equations upon which nearly every aspect of scientific and mathematical understanding depends, In Pursuit of the Unknown is also a reminder that equations have profoundly influenced our thinking and continue to make possible many of the advances that we take for granted.

    From Mary, Queen of Scots, trapped by her own code, to the Navajo Code Talkers who helped the Allies win World War II, to the incredible (and incredibly simple) logisitical breakthrough that made Internet commerce secure, The Code Book tells the story of the most powerful intellectual weapon ever known: secrecy.Throughout the text are clear technical and mathematical explanations, and portraits of the remarkable personalities who wrote and broke the world’s most difficult codes. Accessible, compelling, and remarkably far-reaching, this book will forever alter your view of history and what drives it. It will also make you wonder how private that e-mail you just sent really is.

    … The book the National Security Agency wanted never to be published." –Wired Magazine "…monumental… fascinating… comprehensive… the definitive work on cryptography for computer programmers…" –Dr. Dobb's Journal"…easily ranks as one of the most authoritative in its field." —PC Magazine"…the bible of code hackers." –The Millennium Whole Earth CatalogThis new edition of the cryptography classic provides you with a comprehensive survey of modern cryptography. The book details how programmers and electronic communications professionals can use cryptography—the technique of enciphering and deciphering messages-to maintain the privacy of computer data. It describes dozens of cryptography algorithms, gives practical advice on how to implement them into cryptographic software, and shows how they can be used to solve security problems. Covering the latest developments in practical cryptographic techniques, this new edition shows programmers who design computer applications, networks, and storage systems how they can build security into their software and systems. What's new in the Second Edition? * New information on the Clipper Chip, including ways to defeat the key escrow mechanism * New encryption algorithms, including algorithms from the former Soviet Union and South Africa, and the RC4 stream cipher * The latest protocols for digital signatures, authentication, secure elections, digital cash, and more * More detailed information on key management and cryptographic implementations

    Practical Algebra is an easy andfun-to-use workout program that quickly puts you in command of allthe basic concepts and tools of algebra. With the aid of practical, real-life examples and applications, you'll learn: * The basic approach and application of algebra to problemsolving * The number system (in a much broader way than you have known itfrom arithmetic) * Monomials and polynomials; factoring algebraic expressions; howto handle algebraic fractions; exponents, roots, and radicals;linear and fractional equations * Functions and graphs; quadratic equations; inequalities; ratio, proportion, and variation; how to solve word problems, andmore Authors Peter Selby and Steve Slavin emphasize practical algebrathroughout by providing you with techniques for solving problems ina wide range of disciplines--from engineering, biology, chemistry, and the physical sciences, to psychology and even sociology andbusiness administration. Step by step, Practical Algebra shows youhow to solve algebraic problems in each of these areas, then allowsyou to tackle similar problems on your own, at your own pace.Self-tests are provided at the end of each chapter so you canmeasure your mastery.

    With Step By Step, you set the pace-building and practicing the skills you need, just when you need them! Topics include building a project plan and fine-tuning the details; scheduling tasks, assigning resources, and managing dependencies; monitoring progress and costs; keeping projects on track; communicating project data through Gantt charts and other views.