Each chapter addresses de-facto standards, popular technologies, and design principles applicable to a wide variety of systems. Complete with chapter summaries, end-of-chapter exercises and bibliographies, Distributed Operating Systems concludes with a set of case studies that provide real-world insights into four distributed operating systems.

    During the summer of his senior year at college, while earning a B.A. in Economics and Political Science, David P. Spears spent eighty hours undercover as a panhandler. Systematically recording every transaction at the exit ramp, Spears captured a rarely seen picture of how modern urban charity works.This book is the record of his adventures, part economic research, part investigative journalism. Both the numbers and the stories behind the numbers provide answers to the questions we’ve all been wondering: Who gives more to panhandlers—men or women? What percentage of drivers roll down their windows to donate? And most important of all, how much can a panhandler earn per hour?Get out your bi-weekly pay stub—by the end of this book you’ll know if you make more or less than the guy with the cardboard sign.

    In addition to giving a strong foundation in the language itself, Lubanovic shows how to use it for a range of applications in business, science, and the arts, drawing on the rich collection of open source packages developed by Python fans.It's impressive how many commercial and production-critical programs are written now in Python. Developed to be easy to read and maintain, it has proven a boon to anyone who wants applications that are quick to write but robust and able to remain in production for the long haul.This book focuses on the current version of Python, 3.x, while including sidebars about important differences with 2.x for readers who may have to deal with programs in that version.

    This is official Amazon Web Services (AWS) documentation for Amazon Compute Cloud (Amazon EC2).This guide explains the infrastructure provided by the Amazon EC2 web service, and steps you through how to configure and manage your virtual servers using the AWS Management Console (an easy-to-use graphical interface), the Amazon EC2 API, or web tools and utilities.Amazon EC2 provides resizable computing capacity—literally, server instances in Amazon's data centers—that you use to build and host your software systems.

    You’ll never be able to prevent all possible failure modes, but you can identify many of the weaknesses in your system before they’re triggered by these events. This report introduces you to Chaos Engineering, a method of experimenting on infrastructure that lets you expose weaknesses before they become a real problem.Members of the Netflix team that developed Chaos Engineering explain how to apply these principles to your own system. By introducing controlled experiments, you’ll learn how emergent behavior from component interactions can cause your system to drift into an unsafe, chaotic state.- Hypothesize about steady state by collecting data on the health of the system- Vary real-world events by turning off a server to simulate regional failures- Run your experiments as close to the production environment as possible- Ramp up your experiment by automating it to run continuously- Minimize the effects of your experiments to keep from blowing everything up- Learn the process for designing chaos engineering experiments- Use the Chaos Maturity Model to map the state of your chaos program, including realistic goals

    This report provides a brief yet comprehensive introduction to Python for engineers, researchers, and data scientists who are already familiar with another programming language.Author Jake VanderPlas, an interdisciplinary research director at the University of Washington, explains Python’s essential syntax and semantics, built-in data types and structures, function definitions, control flow statements, and more, using Python 3 syntax.You’ll explore:- Python syntax basics and running Python codeBasic semantics of Python variables, objects, and operators- Built-in simple types and data structures- Control flow statements for executing code blocks conditionally- Methods for creating and using reusable functionsIterators, list comprehensions, and generators- String manipulation and regular expressions- Python’s standard library and third-party modules- Python’s core data science tools- Recommended resources to help you learn more

    In contrast, most software developers only ever get to know a handful of large programs well—usually programs they wrote themselves—and never study the great programs of history. As a result, they repeat one another's mistakes rather than building on one another's successes.This book's goal is to change that. In it, the authors of twenty-five open source applications explain how their software is structured, and why. What are each program's major components? How do they interact? And what did their builders learn during their development? In answering these questions, the contributors to this book provide unique insights into how they think.If you are a junior developer, and want to learn how your more experienced colleagues think, this book is the place to start. If you are an intermediate or senior developer, and want to see how your peers have solved hard design problems, this book can help you too.

    With this concise book, you will quickly gain working knowledge of Sinatra and its minimalist approach to building both standalone and modular web applications. Sinatra serves as a lightweight wrapper around Rack middleware, with syntax that maps closely to functions exposed by HTTP verbs, which makes it ideal for web services and APIs. If you have experience building applications with Ruby, you’ll quickly learn language fundamentals and see under-the-hood techniques, with the help of several practical examples. Then you’ll get hands-on experience with Sinatra by building your own blog engine. Learn Sinatra’s core concepts, and get started by building a simple application Create views, manage sessions, and work with Sinatra route definitions Become familiar with the language’s internals, and take a closer look at Rack Use different subclass methods for building flexible and robust architectures Put Sinatra to work: build a blog that takes advantage of service hooks provided by the GitHub API

    Explore applying the Hexagonal Architecture within your application, whether within an open source framework or your own bespoke system. Finally, look into integrating Bounded Contexts, using REST and Messaging approaches.

    Build hands-on expertise through a series of lessons, exercises, and suggested practices—and help maximize your performance on the job.Provides in-depth, hands-on training you take at your own pace Focuses on job-role-specific expertise for using HTML5, JavaScript, and CSS3 to begin building modern web and Windows 8 apps Features pragmatic lessons, exercises, and practices Creates a foundation of skills which, along with on-the-job experience, can be measured by Microsoft Certification exams such as 70-480 Coverage includes: creating HTML5 documents; implementing styles with CSS3; JavaScript in depth; using Microsoft developer tools; AJAX; multimedia support; drawing with Canvas and SVG; drag and drop functionality; location-aware apps; web storage; offline apps; writing your first simple Windows 8 apps; and other key topics

    Fat, they told us, was the enemy. Then it was salt, then sugar, then cholesterol... and on it goes. Americans listened and they lost -- but not their excess fat. What they lost was their health and waistlines. Americans are the fattest people on earth... and why? Mainly because of the food they eat. In this scientific and revolutionary book, based on Nobel Prize-winning research, medical visionary and former Massachusetts Institute of Technology researcher Dr. Barry Sears makes peak physical and mental performance, as well as permanent fat loss, simple for you to understand and achieve. With lists of good and bad carbohydrates, easy-to-follow food blocks and delicious recipes, The Zone provides all you need to begin your journey toward permanent fat loss, great health and all-round peak performance. In balance, your body will not only burn fat, but you'll fight heart disease, diabetes, PMS, chronic fatigue, depression and cancer, as well as alleviate the painful symptoms of diseases such as multiple sclerosis and HIV. This Zone state of exceptional health is well-known to champion athletes. Your own journey toward it can begin with your next meal. You will no longer think of food as merely an item of pleasure or a means to appease hunger. Food is your medicine and your ticket to that state of ultimate body balance, strength and great health: the Zone.

    He is just starting to learn Spanish from the very beginning. Reading about his daily life in the capital of Spain, you will learn about Spanish culture and improve your language skills along the way. This story is the first part in a series of Spanish Easy Readers called SPANISH FOR BEGINNERS, whose aim is to help you learn Spanish from scratch and reach an intermediate level. Therefore, the difficulty of the text and the language used in this short story have been adapted to help students revise and consolidate their grammar and vocabulary in Spanish at level A1 on the Common European Framework of Reference. Repetition, repetition, repetition… Repetition is key in this book: you will read the same words, the same expressions and the same grammar structures again and again. When learning new words and new expressions in a foreign language, repetition is essential. You need to read (and hear) the same words again and again, in different contexts, in order to understand its meaning and to be able to remember them later on. That is the reason we say this book is carefully designed to help you revise and consolidate fundamental vocabulary and basic grammar structures studied in any Spanish beginner course: you will read the same words, the same expressions and the same grammar structures again and again, in different contexts, in order to help you understand its meaning and be able to remember them later on. Vocabulary and comprehension questions. Each chapter comes with a list of the main vocabulary used in the text and reading comprehension questions to help you understand the story and learn the vocabulary and grammar involved.

    Two leaders in the requirements community have teamed up to deliver a contemporary set of practices covering the full range of requirements development and management activities on software projects. Describes practical, effective, field-tested techniques for managing the requirements engineering process from end to end. Provides examples demonstrating how requirements "good practices" can lead to fewer change requests, higher customer satisfaction, and lower development costs. Fully updated with contemporary examples and many new practices and techniques. Describes how to apply effective requirements practices to agile projects and numerous other special project situations. Targeted to business analysts, developers, project managers, and other software project stakeholders who have a general understanding of the software development process. Shares the insights gleaned from the authors' extensive experience delivering hundreds of software-requirements training courses, presentations, and webinars.New chapters are included on specifying data requirements, writing high-quality functional requirements, and requirements reuse. Considerable depth has been added on business requirements, elicitation techniques, and nonfunctional requirements. In addition, new chapters recommend effective requirements practices for various special project situations, including enhancement and replacement, packaged solutions, outsourced, business process automation, analytics and reporting, and embedded and other real-time systems projects.

    Teaches developers how to build database-driven web applications using two of today's most popular open-source software tools, PHP and MySQL.

    You'll learn pragmatic ways of approaching the development process and your personal coding techniques. You'll learn about your own attitudes, issues with working on a team, and how to best manage your learning, all in an iterative, incremental, agile style. You'll see how to apply each practice, and what benefits you can expect. Bottom line: This book will make you a better developer.