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As the Internet revolution continues to unfold and transform telecommunications, pressure is building for faster, less expensive, and more widely accessible broadband service. Such a development would facilitate improved and less expensive traditional applications such as voice telephony and web browsing. It would also enable new and useful applications such as Internet-based television, videoconferencing, and software distribution. Broadband has great potential to improve efficiency and productivity, even to improve national security in some cases. Broadband service and affordability, however, have consistently lagged well behind demand and progress in information technology, with damaging results. The Internet revolution remains incomplete and threatens to stagnate if the situation continues. In The Broadband Problem, economist and technology entrepreneur Charles H. Ferguson explains the causes and ramifications of this damaging bottleneck, and he offers suggestions on improving the current state of affairs. He asserts that current telecommunications law and policy have not provided sufficient levels of new entry, competition, and innovation in the local telecom market. The continuing dominance of ILECs (incumbent local exchange carriers) in that market impedes the healthy, and much-needed, development of an efficient broadband market. The result of these policy and market failures is inadequate technological progress, innovation, and productivity in advanced Internet services and telecommunication services generally. The broadband problem is holding us back, and thus must be addressed and solved. With this important volume, Charles Ferguson has contributed mightily to that mission.
This report presents findings of a workshop featuring representatives of Internet Service Providers and others with access to data and insights about how the Internet performed on and immediately after the September 11 attacks. People who design and operate networks were asked to share data and their own preliminary analyses among participants in a closed workshop. They and networking researchers evaluated these inputs to synthesize lessons learned and derive suggestions for improvements in technology, procedures, and, as appropriate, policy.
CliffsQuickReview course guides cover the essentials of your toughest classes. Get a firm grip on core concepts and key material, and test your newfound knowledge with review questions. CliffsQuickReview Math Word Problems gives you a clear, concise, easy-to-use review of the basics of solving math word problems. Introducing each topic, defining key terms, and carefully walking you through each sample problem gives you insight and understanding to solving math word problems. You begin by building a strong foundation in translating expressions, inserting parentheses, and simplifying expressions. On top of that base, you can build your skills for solving word problems: Discover the six basic steps for solving word problems Translate English-language statements into equations and then solve them Solve geometry problems involving single and multiple shapes Work on proportion and percent problems Solve summation problems by using the Board Method Use tried-and-true methods to solve problems about money, investments, mixtures, and distance CliffsQuickReview Math Word Problems acts as a supplement to your textbook and to classroom lectures. Use this reference in any way that fits your personal style for study and review — you decide what works best with your needs. Here are just a few ways you can search for information: View the chapter on common errors and how to avoid them Get a glimpse of what you’ll gain from a chapter by reading through the Chapter Check-In at the beginning of each chapter Use the Chapter Checkout at the end of each chapter to gauge your grasp of the important information you need to know Test your knowledge more completely in the CQR Review and look for additional sources of information in the CQR Resource Center Use the glossary to find key terms fast With titles available for all the most popular high school and college courses, CliffsQuickReview guides are a comprehensive resource that can help you get the best possible grades.
Maintaining a PC is important, and troubleshooting a PC can be a challenge. Dan Gookin is great at explaining how to handle common PC problems, and he’s provided a complete, plain-English manual in Troubleshooting & Maintaining Your PC All-in-One For Dummies. Liberally laced with Dan’s famous humor and clear instructions, Troubleshooting & Maintaining Your PC All-in-One For Dummies is divided into six minibooks covering hardware, software, laptops, Internet, networking, and maintenance. Each one gives you some background on what causes common problems, to help you understand what’s wrong as well as how to fix it. You’ll learn to: Troubleshoot both Windows XP and Vista Solve e-mail and Web woes, makes friends with ActiveX, and protect your system from evil software and viruses Resolve router problems, reset the modem, delve into IP addresses, and find the elusive wireless network Investigate startup issues, battery quirks, and power problems Travel safely and efficiently with your laptop Perform regular maintenance and keep good backups Solve problems with disks and printers Find missing files, successfully restore files if something major goes wrong, and pep up your PC The bonus DVD walks you through some of the complex steps discussed in the book and demonstrates tasks like removing a hard drive. There’s a great collection of free and demo software, too. Troubleshooting & Maintaining Your PC All-in-One For Dummies is tech support in a book! Note: CD-ROM/DVD and other supplementary materials are not included as part of eBook file.
This monograph presents a unified approach to model-based processing for underwater acoustic arrays. The use of physical models in passive array processing is not a new idea, but it has been used on a case-by-case basis, and as such, lacks any unifying structure. This work views all such processing methods as estimation procedures, which then can be unified by treating them all as a form of joint estimation based on a Kalman-type recursive processor, which can be recursive either in space or time, depending on the application. This is done for three reasons. First, the Kalman filter provides a natural framework for the inclusion of physical models in a processing scheme. Second, it allows poorly known model parameters to be jointly estimated along with the quantities of interest. This is important, since in certain areas of array processing already in use, such as those based on matched-field processing, the so-called mismatch problem either degrades performance or, indeed, prevents any solution at all. Thirdly, such a unification provides a formal means of quantifying the performance improvement. The term model-based will be strictly defined as the use of physics-based models as a means of introducing a priori information. This leads naturally to viewing the method as a Bayesian processor. Short expositions of estimation theory and acoustic array theory are presented, followed by a presentation of the Kalman filter in its recursive estimator form. Examples of applications to localization, bearing estimation, range estimation and model parameter estimation are provided along with experimental results verifying the method. The book is sufficiently self-contained to serve as a guide for the application of model-based array processing for the practicing engineer.
Combining analytic theory and modern computer-aided design techniques this volume will enable you to understand and design power transfer networks and amplifiers in next generation radio frequency (RF) and microwave communication systems. A comprehensive theory of circuits constructed with lumped and distributed elements is covered, as are electromagnetic field theory, filter theory, and broadband matching. Along with detailed roadmaps and accessible algorithms, this book provides up-to-date, practical design examples including: filters built with microstrip lines in C and X bands; various antenna matching networks over HF and microwave frequencies; channel equalizers with arbitary gain shapes; matching networks for ultrasonic transducers; ultra wideband microwave amplifiers constructed with lumped and distributed elements. A companion website details all Real Frequency Techniques (including line segment and computational techniques) with design tools developed on MatLab. Essential reading for all RF and circuit design engineers, this is also a great reference text for other electrical engineers and researchers working on the development of communications applications at wideband frequencies. This book is also beneficial to advanced electrical and communications engineering students taking courses in RF and microwave communications technology. www.wiley.com/go/yarman_wideband
Each chapter in this innovative social problems text is written by a specialist or pair of specialists from appropriate subfields within sociology. The typical single-author approach is limiting given the complexity of the contemporary issues surrounding each social problem discussed. Involving many content experts ensures that the theories, research, and examples used in each chapter will be as current and relevant as possible. Chapters open with personal statements from the contributing authors, discussing how they got involved with studying the problem they are writing about. Javier Trevino serves as the general editor, making sure that each author follows the chapter template and maintains a consistency in level and style.
Broadband Last Mile: Access Technologies for Multimedia Communications provides in-depth treatments of access technologies and the applications that rely upon them or support them. It examines innovations and enhancements along multiple dimensions in access, with the overarching goal of ensuring that the last mile is not the weak link in the broadband chain. Written by experts from the academic and commercial segments of the field, the book's self-contained sections address topics related to the disciplines of communications, networking, computing, and signal processing. The core of this treatment contains contemporary reviews of broadband pipes in the classes of copper, cable, fiber, wireless, and satellite. It emphasizes the coexistence of these classes within a network, the importance of optical communications for unprecedented bandwidth, and the flexibility and mobility provided by wireless. The book also includes perspective on the increasingly important topic of network management, providing insights that are true regardless of the nature of the pipe. The text concludes with a discussion of newly emerging applications and broadband services. This book offers an all-in-one treatment of the physical pipes and network architectures that make rich and increasingly personalized applications possible. It serves as a valuable resource for researchers and practitioners working in the increasingly pervasive field of broadband.
This book explains why Asia leads the broadband revolution while the United States and Europe struggle to keep up.