What is IPSec? What's a VPN? Why do the need each other? Virtual Private Network (VPN) has become one of the most recognized terms in our industry, yet there continuously seems to be different impressions of what VPNs really are and can become.
Design a virtualized data center with VMware vSphere 6.7
About This Book Handle your data with precision and care for optimal business intelligence Restructure and transform your data to inform decision-making Packed with practical advice and tips to help you get to grips with data mining Who This Book Is For If you are a data scientist or R developer who wants to explore and optimize your use of R's advanced features and tools, this is the book for you. A basic knowledge of R is required, along with an understanding of database logic. What You Will Learn Connect to and load data from R's range of powerful databases Successfully fetch and parse structured and unstructured data Transform and restructure your data with efficient R packages Define and build complex statistical models with glm Develop and train machine learning algorithms Visualize social networks and graph data Deploy supervised and unsupervised classification algorithms Discover how to visualize spatial data with R In Detail R is an essential language for sharp and successful data analysis. Its numerous features and ease of use make it a powerful way of mining, managing, and interpreting large sets of data. In a world where understanding big data has become key, by mastering R you will be able to deal with your data effectively and efficiently. This book will give you the guidance you need to build and develop your knowledge and expertise. Bridging the gap between theory and practice, this book will help you to understand and use data for a competitive advantage. Beginning with taking you through essential data mining and management tasks such as munging, fetching, cleaning, and restructuring, the book then explores different model designs and the core components of effective analysis. You will then discover how to optimize your use of machine learning algorithms for classification and recommendation systems beside the traditional and more recent statistical methods. Style and approach Covering the essential tasks and skills within data science, Mastering Data Analysis provides you with solutions to the challenges of data science. Each section gives you a theoretical overview before demonstrating how to put the theory to work with real-world use cases and hands-on examples.
In a world of self-driving cars and big data, smart algorithms and Siri, we know that artificial intelligence is getting smarter every day. Though all these nifty devices and programs might make our lives easier, they're also well on their way to making "good" jobs obsolete. A computer winning Jeopardy might seem like a trivial, if impressive, feat, but the same technology is making paralegals redundant as it undertakes electronic discovery, and is soon to do the same for radiologists. And that, no doubt, will only be the beginning. In Silicon Valley the phrase "disruptive technology" is tossed around on a casual basis. No one doubts that technology has the power to devastate entire industries and upend various sectors of the job market. But Rise of the Robots asks a bigger question: can accelerating technology disrupt our entire economic system to the point where a fundamental restructuring is required? Companies like Facebook and YouTube may only need a handful of employees to achieve enormous valuations, but what will be the fate of those of us not lucky or smart enough to have gotten into the great shift from human labor to computation? The more Pollyannaish, or just simply uninformed, might imagine that this industrial revolution will unfold like the last: even as some jobs are eliminated, more will be created to deal with the new devices of a new era. In Rise of the Robots, Martin Ford argues that is absolutely not the case. Increasingly, machines will be able to take care of themselves, and fewer jobs will be necessary. The effects of this transition could be shattering. Unless we begin to radically reassess the fundamentals of how our economy works, we could have both an enormous population of the unemployed-the truck drivers, warehouse workers, cooks, lawyers, doctors, teachers, programmers, and many, many more, whose labors have been rendered superfluous by automated and intelligent machines.
Visible light communication (VLC) is an evolving communication technology for short-range applications. Exploiting recent advances in the development of high-power visible-light emitting LEDs, VLC offers an energy-efficient, clean alternative to RF technology, enabling the development of optical wireless communication systems that make use of existing lighting infrastructure. Drawing on the expertise of leading researchers from across the world, this concise book sets out the theoretical principles of VLC, and outlines key applications of this cutting-edge technology. Providing insight into modulation techniques, positioning and communication, synchronisation, and industry standards, as well as techniques for improving network performance, this is an invaluable resource for graduate students and researchers in the fields of visible light communication, optical wireless communication, and industrial practitioners in the field of telecommunications.
Driven by a combination of technological improvements and commercial pressure, interest in IPTV services has increasingly grown. IPTV refers to the use of the Internet protocol required for delivery of television content. IPTV represents an emerging technology that could change the manner in which homes receive entertainment, personal computers operate, and people use cell phones. Beginning with a comprehensive introduction, Understanding IPTV examines concepts, applications, and possible impacts of IPTV. The book covers market drivers and developing IPTV infrastructure. It explains television concepts, including several popular compression standards, and considers the TCP/IP protocol suite. It also identifies so-called "last mile" solutions and details the operation and utilization of hardware and software components required to view television content delivered over different types of IP networks. The author addresses the industry players and alliances, providing an understanding of companies that are working with the technology. Concluding with examples of the use of IPTV, he illustrates the potential of this evolving technology. Exploring the current state of the IPTV market, business opportunities, and trial services worldwide, Understanding IPTV discusses the advantages that IPTV offers network operators and the new revenue streams that may emerge. It presents different IPTV technologies and the products that manufacturers are bringing to the market.
Are you involved in implementing wireless mesh networks? As mesh networks move towards large-scale deployment, this highly practical book provides the information and insights you need. The technology is described, potential pitfalls in implementation are identified, clear hints and tips for success are provided, and real-world implementation examples are evaluated. Moreover, an introduction to wireless sensor networks (WSN) is included. This is an invaluable resource for electrical and communications engineers, software engineers, technology and information strategists in equipment, content and service providers, and spectrum regulators. It is also a useful guide for graduate students in wireless communications, and telecommunications.
This extensively revised second edition of the Artech House classic, Microwaves and Wireless Simplified, is essential reading for sales, marketing, or management professionals whose work involves microwave or wireless communications technology. It offers non-technical professionals an edge in their career by providing them with a thorough understanding of key concepts, components, devices, materials, and applications. Helping managers foresee emerging market trends, the second edition has been updated and expanded to include coverage of the latest technologies, including WLANs, RFIDs, RFICs, MEMS, and bipolar heterojunction devices. The new edition also includes more definitions of basic technological terms that are important for today's professionals to understand.
Wireless technology, like many other technical fields, has its own set of jargon and acronyms. Many times, these acronyms are used simply to reduce the effort required to describe concepts. The goal of this book is to provide meaning for the acronyms and jargon used in the wireless industry with a particular emphasis on commercial systems. Although not exhaustive, an additional goal was to include the most commonly used terms. Individuals who are experts in one particular field, e.g., 3G cellular or WLANs, will find terms from other fields with which they are unfamiliar. Individuals who need to have broad view of the wireless landscape will find that this book covers most of the topics and terms that are important in today's market. This book is a dictionary that reads more like an encyclopedia. Rather than just giving a terse definition for various wireless terms, many of the definitions contain additional information to provide context for understanding the term. A little history is added where appropriate as well as some opinion regarding the technical and marketing issues that make the design of wireless systems so interesting. The book is organized into two sections. The first contains an overview of the book and addresses a couple of topics that are common to many of the definitions, frequency bands and the OSI networking model. The second part of the book contains the definitions in alphabetical order.
The field of organic electronics spans a very wide range of disciplines from physics and chemistry to hardware and software engineering. This makes the field of organic circuit design a daunting prospect full of intimidating complexities, yet to be exploited to its true potential. Small focused research groups also find it difficult to move beyond their usual boundaries and create systems-on-foil that are comparable with the established silicon world. This book has been written to address these issues and is intended for two main readerships: firstly, physics or materials researchers who have thus far designed circuits using only basic drawing software; secondly, experienced silicon CMOS VLSI design engineers who are already knowledgeable in the design of full custom transistor-level circuits but are not familiar with organic devices or thin-film transistor devices. In guiding the reader through the disparate and broad subject matters, a concise text has been written covering the physics and chemistry of the materials, the derivation of the transistor models, the software construction of the simulation compact models, and the engineering challenges of a right-first-time design flow, with notes and references to the current state-of-the-art advances and publications. Real-world examples of simulation models, circuit designs, fabricated samples, and measurements have also been given, demonstrating how the theory can be used in applications.
The purpose of the 10th ACIS International Conference on Software Engineering Artificial Intelligence, Networking and Parallel/Distributed Computing (SNPD rd 2009), held in Daegu, Korea on May 27–29, 2009, the 3 International Workshop st on e-Activity (IWEA 2009) and the 1 International Workshop on Enterprise Architecture Challenges and Responses (WEACR 2009) is to aim at bringing together researchers and scientist, businessmen and entrepreneurs, teachers and students to discuss the numerous fields of computer science, and to share ideas and information in a meaningful way. Our conference officers selected the best 24 papers from those papers accepted for presentation at the conference in order to publish them in this volume. The papers were chosen based on review scores submitted by members of the program committee, and underwent further rounds of rigorous review. In chapter 1, Igor Crk and Chris Gniady propose a network-aware energy m- agement mechanism that provides a low-cost solution that can significantly reduce energy consumption in the entire system while maintaining responsiveness of local interactive workloads. Their dynamic mechanisms reduce the decision delay before the disk is spun-up, reduce the number of erroneous spin-ups in local wo- stations, decrease the network bandwidth, and reduce the energy consumption of individual drives. In chapter 2, Yoshihito Saito and Tokuro Matsuo describe a task allocation mechanism and its performance concerning with software developing. They run simulations and discuss the results in terms of effective strategies of task allocation.