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This new edition has been extensively revised to reflect the progress in error control coding over the past few years. Over 60% of the material has been completely reworked, and 30% of the material is original. Convolutional, turbo, and low density parity-check (LDPC) coding and polar codes in a unified framework Advanced research-related developments such as spatial coupling A focus on algorithmic and implementation aspects of error control coding

Improve the performance of relational databases with indexes designed for today's hardware Over the last few years, hardware and software have advanced beyond all recognition, so it's hardly surprising that relational database performance now receives much less attention. Unfortunately, the reality is that the improved hardware hasn't kept pace with the ever-increasing quantity of data processed today. Although disk packing densities have increased enormously, making storage costs extremely low and sequential read very fast, random reads are still painfully slow. Many of the old design recommendations are therefore no longer valid-the optimal point of indexing has come a long way. Consequently many of the old problems haven't actually gone away-they have simply changed their appearance. This book provides an easy but effective approach to the design of indexes and tables. Using lots of examples and case studies, the authors describe how the DB2, Oracle, and SQL Server optimizers determine how to access data, and how CPU and response times for the resulting access paths can be quickly estimated. This enables comparisons to be made of the various designs, and helps you choose available choices for the most appropriate design. This book is intended for anyone who wants to understand the issues of SQL performance or how to design tables and indexes effectively. With this title, readers with many years of experience of relational systems will be able to better grasp the implications that have been brought into play by the introduction of new hardware.

Alliterative Revivals is the first full-length study of the sophisticated historical consciousness of late medieval alliterative romance. Drawing from historicism, feminism, performance studies, and postcolonial theory, Christine Chism argues that these poems animate British history by reviving and acknowledging potentially threatening figures from the medieval past—pagan judges, primeval giants, Greek knights, Jewish forefathers, Egyptian sorcerers, and dead ancestors. In addressing the ways alliterative poems centralize history—the dangerous but profitable commerce of the present with the past—Chism's book shifts the emphasis from the philological questions that have preoccupied studies of alliterative romance and offers a new argument about the uses of alliterative poetry, how it appealed to its original producers and audiences, and why it deserves attention now. Alliterative Revivals examines eight poems: St. Erkenwald , Sir Gawain and the Green Knight , The Wars of Alexander , The Siege of Jerusalem , the alliterative Morte Arthure , De Tribus Regibus Mortuis , The Awntyrs off Arthure , and Somer Sunday . Chism both historicizes these texts and argues that they are themselves obsessed with history, dramatizing encounters between the ancient past and the medieval present as a way for fourteenth-century contemporaries to examine and rethink a range of ideologies. These poems project contemporary conflicts into vivid, vast, and spectacular historical theaters in order to reimagine the complex relations between monarchy and nobility, ecclesiastical authority and lay piety, courtly and provincial culture, western Christendom and its easterly others, and the living and their dead progenitors. In this, alliterative romance joins hands with other late fourteenth-century literary texts that make trouble at the borders of aristocratic culture.