David Ginsburg – författare

A practical, service-oriented guide to large-scale ADSL implementation. From service architecture to applications, standards to business case, Implementing ADSL delivers a complete, up-to-date analysis of what it takes to deploy ADSL. Written by a leading authority in the field, this book will be equally valuable for implementers and decision-makers in both service provider and enterprise IT organizations. The author begins with a detailed look at the business drivers and financial models associated with ADSL implementation. Learn how to estimate ADSL service demand, revenue, capital, and ongoing expenses over the short and long-term; then review the current status of ADSL, G.Lite, and other xDSL technologies, cable modems, and other alternatives. Next, Ginsburg introduces the ADSL service architecture, outlining an end-to-end service model from the physical layer to the network layer, and addressing crucial issues such as Quality of Service (QoS), security, and IP multicasting.Understand ADSL's physical infrastructure, including splitters and other premises equipment; DSLAMs and other central office equipment; aggregation, access, and core networks; digital loop carriers; gateways; caching solutions; and other key elements. The author also reviews a wide range of ADSL services, including end-to-end ATM virtual circuits, PPP connections, bridging, routing, voice, video, and portals. You'll find seven detailed implementation scenarios, complete with diagrams and configuration listings based on actual deployments: *Residential and corporate Internet access *Telecommuting *Portals and media distribution *Internet wholesaling *Corporate intranets and extranets *Voice over IP *Video streaming Whether you are a network manager, architect, administrator, or engineer, Implementing ADSL brings together crucial information and insight for making the best possible decisions about today's most important access technology. 0201657600B04062001

Treats certain problems and methods of theoretical physics and astrophysics which are associated with microscopic and macroscopic electrodynamics and material concerning the theory of transition radiation and transition scattering.

Treats certain problems and methods of theoretical physics and astrophysics which are associated with microscopic and macroscopic electrodynamics and material concerning the theory of transition radiation and transition scattering.

Treats certain problems and methods of theoretical physics and astrophysics which are associated with microscopic and macroscopic electrodynamics and material concerning the theory of transition radiation and transition scattering.

Serpins (serine protease inhibitors) are a superfamily of proteins whose physiologi- cal action is primarily targeted to inhibiting serine proteases. There are instances where serpins are not inhibitors (and can carry steroid hormones for instance), yet key structural and functional elements found in all serpins are maintained in these 'non-inhibitor' ser- pins. Many serpins have well-described biological properties which influence pathophysi- ological events, including: antithrombin (historically called antithrombin III), ai-protease inhibitor (historically called ai-antitrypsin), and plasminogen activator inhibitor-I, just to mention a few. A deficiency or defect in antithrombin leads to venous thromboembolic disease, while a deficiency or defect in ai-protease inhibitor is associated with chronic obstructive pulmonary emphysema. In contrast, it has been suggested that increased levels of plasminogen activator inhibitor-l may be a predisposition to myocardial infarction. The list goes on for each of our own "favorite" serpin. The biological roles found for serpins are key participants in almost every physiological event.In other words, serine proteases are needed for many events in biology and the role of serpins to down regulate these pro- teases is essential. Thus, just using these three examples above for serpins and their patho- physiological roles reminds us that the medical costs to control such events is significant worldwide.

Concerning Amines

Concerning Amines: Their Properties, Preparation and Reactions attempts to describe the accumulated knowledge on the properties of amines. This text first discusses nitrogen atom contained in amines, along with the basicity, geometry, nomenclature, occurrence, reaction, and preparation of these derivatives of ammonia. This book then explains the stereochemistry of the amino group and of quaternary ammonium compounds. Amine salts; absolute configuration of asymmetric amines; and influence of amino group are also tackled. This text also looks into the amino group in heterocyclic aromatic systems. This book concludes by explaining the syntheses of heterocyclic amines, enamines, and further reactions of carbonyl compounds with amines, including the Eschweiler, Vilsmeyer, and von Braun reactions. This publication will be invaluable to those interested in studying the properties of amines, such as chemists and students of chemistry.