Peer-to-Peer (P2P) hat sich binnen kurzer Zeit zu einem der meistdiskutierten Phänomene in der jüngeren Geschichte der Informationstechnologie herausgebildet. Die millionenfach frequentierten Musiktauschbörsen wie etwa Napster haben dabei zu kontroversen Bewertungen von P2P geführt. Neben File-Sharing à la Napster zählen Instant Messaging, Collaboration/P2P Groupware, Grid bzw. Distributed Computing und Web Services zu den weiteren Facetten von P2P. Damit verbunden ist die Vorstellung leistungsfähiger Infrastrukturen für virtuelle Gemeinschaften, die Ressourcen teilen, Informationsaustauschprozesse beschleunigen und neuartige kollaborative Arbeitsumgebungen ermöglichen, ohne dass es einer zentralen Koordinationsinstanz bedarf. Die Autoren analysieren aus ökonomischer, technologischer und juristischer Perspektive Innovationspotentiale, offene Fragen und Risiken aller Anwendungsbereiche von P2P, stellen zentrale Konzepte, Geschäftsmodelle und professionelle Einsatzmöglichkeiten vor, diskutieren anhand aktueller Praxisbeispiele u.a. der Medienbranche Herausforderungen und skizzieren Technik-Initiativen wichtiger Marktspieler.

Applications that require a high degree of distribution and loosely-coupled connectivity are ubiquitous in various domains, including scientific databases, bioinformatics, and multimedia retrieval. In all these applications, data is typically voluminous and multidimensional, and support for advanced query operators is required for effective querying and efficient processing. To address this challenge, we adopt a hybrid P2P architecture and propose novel indexing and query processing algorithms. We present a scalable framework that relies on data summaries that are distributed and maintained as multidimensional routing indices. Different types of data summaries enable efficient processing of a variety of advanced query operators.

Sie möchten Ihre Lehrveranstaltungen aktivierender und wirksamer gestalten? Sie möchten die Verständnisschwierigkeiten Ihrer Studierenden besser erkennen und verstehen? Sie möchten die studentische Beteiligung steigern, zum Nachdenken und Diskutieren anregen? Lernen Sie das Potenzial von Clickerfragen für die akademische Lehre kennen – damit es bei Ihren Studierenden klick macht! In diesem Buch werden die Grundlagen der interaktiv-dialogischen Lehrmethode praxisnah erläutert. Dabei werden auch häufige Fragen zu didaktischen, organisatorischen und technischen Aspekten beantwortet, etwa: Was ist die Grundidee von Peer Instruction? Wie wirksam ist Peer Instruction? Wie überzeuge ich meine Studierenden davon? Welche technischen Voraussetzungen gibt es? Wie stelle ich gute Clickerfragen? Was sollte ich sonst noch beachten?

Amy Rubin, the seven-year-old daughter of one of this volume's editors, was discussing with her close friend Kristin,. her teacher's practice of distributing stickers to her classmates for completing their seat work. As the conversation continued, Joshua, Amy's two-year-old brother (al­ though Amy would argue that he more often resembles an albatross around her neck) sauntered up to the older children. He flashed a broad smile, hugged his sister, and then grabbed her book of stickers. Corey Ross, the nine-year-old son of the other editor was trying to plan a tobogganing party with his friend Claire. The problem facing Corey and Claire was that there were too few toboggans to go around for their grade four classmates. Jordan, Corey's younger brother had agreed to lend his toboggan. However, Harriet, Claire's younger sister and Jordan's close friend had resisted all persuasive attempts to borrow her toboggan. The older children decided that the best strategy was to use Jordan's friendship with Harriet and his good example of sibling generosity in presenting thejr case to Harriet. Both of these anecdotes exemplify what this volume on peer relation­ ships and social skills is about. Children have friends with whom they discuss issues of perceived social significance. During the early elemen­ tary school years, rather sophisticated conversations and debates con­ cerning topics of reward distribution, altruism, person perception, social status, sibling relations, and cooperation can be overheard (especially by eavesdropping parents who have professional interests in such matters).

Find How to Build Credit by Kimberly Peters in Paperback and other formats in Business & Economics > Personal Finance - General.

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