High-Speed Networking for Multimedia Applications presents the latest research on the architecture and protocols for high-speed networks, focusing on communication support for distributed multimedia applications. This includes the two major issues of ATM Networking and quality of service for multimedia applications. It is to be expected that most of the bandwidth in future high-speed networks will be taken up by multimedia applications, transmitting digital audio and video. Traditional networking protocols are not suitable for this as they do not provide guaranteed bandwidth, end-to-end delay or delay jitter, nor do they have addressing schemes or routing algorithms for multicast connections. High-Speed Networking for Multimedia Applications is a collection of high quality research papers which address these issues, providing interesting and innovative solutions. It is an essential reference for engineers and computer scientists working in this area. It is also a comprehensive text for graduate students of high-speed networking and multimedia applications.

Multimedia data streams will form a major part of the new generation of applications in high-speed networks. Continuous media streams, however, require transmission with guaranteed performance. In addition, many multimedia applications will require peer-to-multipeer communication. Guaranteed performance can only be provided with resource reservation in the network, and efficient multipeer communication must be based on multicast support in the lower layers of the network. Architecture and Protocols for High-Speed Networks focuses on techniques for building the networks that will meet the needs of these multimedia applications. In particular two areas of current research interest in such communication systems are covered in depth. These are the protocol related aspects, such as switched networks, ATM, MAC layer, network and transport layer; and the services and applications. Architecture and Protocols for High-Speed Networks contains contributions from leading world experts, giving the most up-to-date research available. It is an essential reference for all professionals, engineers and researchers working in the area of high-speed networks.

This book gives detailed descriptions of the development of two large scale multiagent systems: Agent.Hospital and Agent.Enterprise. These two systems have been developed in close cooperation with more than 20 enterprises and hospitals. They demonstrate clearly that multiagent technology has a great potential for innovative information systems, if a high degree of flexibility of the overall systems is required, e.g. because human actors and technical systems exhibit a great degree of local autonomy, or if the work environment is highly dynamic.

"What a di?erence a year makes - 52 little weeks" This variation of the ?rst line from Dinah Washington's famous song, which originally reads, "What a di?erence a day makes - 24 little hours," brings it to the point: Accordingtoallexperts,thepress,andmostpeople'simpressionwearetoday in a serious economic recession. Less than one year ago, we practically lived on the "island of the blessed" (namely, at Networking 2008 that was held on the island of Singapore), or in the famous country where "milk and honey ?ow" (or "where wine and liquor ?ow"). This convenient situation has changed abruptly within less than 52 weeks. It looks like the same kind of problems has emerged in all areas - and the "Networking" area has, of course, been a?ected, too. Looking into the 2009 proceedings, however, you will immediately notice that the manuscripts are largely una?ected by any aspect of the economic c- sis (which should be a bit of a consolation). Apparently, research directions are dictated by a process that is all too sluggish in order to be quickly and radically changed by a "tsunami." Likewise, the conference itself was prepared in spite of such a crisis.

This handbook gives an overview on engineering of business information systems with agent technology. It introduces into this challenge, describes how to identify and to address the relevant technical problems, and explains how to engineer, integrated and test multiagent systems for real world applications. The book gives detailed descriptions of the development of two large scale multiagent systems: Agent.Hospital and Agent.Enterprise. These two systems have been developed in close cooperation with more than 20 enterprises and hospitals. They demonstrate clearly that multiagent technology has a great potential for innovative information systems, if a high degree of flexibility of the overall systems is required, e.g. because human actors and technical systems exhibit a great degree of local autonomy, or if the work environment is highly dynamic.

The Internet is subject to permanent modi?cations and to continuous restr- turing. This is primarily due to the tremendous rise in demand for bandwidth by the ever increasing number of users. When compared to the early years of the Internet the quality of the services o?ered had to be signi?cantly improved in di?erent respects (delay, network and service availability, jitter,. . . )inorder to satisfy the needs of many new applications. Within the last decade two new developments have contributed to many new opportunities, as well as to a need for intensive research and development: - the increased mobility of users together with the desire for ubiquitous hi- quality access to all o?ered services, at reasonable cost; - the use of wireless communication. Despite their relatively low capacity (when compared with ?xed backbone n- works) the use of radio links supports the ubiquitous availability of Internet services in a quasiperfect way. A considerable amount of research and development activities are currently - ing on worldwide in order to adapt Internet services to the particular needs of mobile users and of wireless communication links. These questions were - tensively discussed at the ?rst workshop organized by the EURO-NGI Network of Excellence ('Next Generation Internet'), which has been funded by the - ropean Union since January 2004 under their IST programme.

High-Performance Networks for Multimedia Applications presents the latest research on the services and protocols for networks providing the communication support for distributed multimedia applications. The need for end-to-end QoS for these multimedia applications is raising the stakes for a powerful shaping and scheduling in the network adapter. It is also creating a need for new services at the ATM layer, CBR and VBR being augmented by UBR, ABR and GFR which have to be evaluated in the TCP/IP environment of today and tomorrow. With the pressure of all the new technologies available today, the backbone architecture needs to be revisited and the success of the TCP/IP must not eliminate the possibility of adding a native ATM access to it. Most of the research in communication services such as IntServ, DiffServ and Native ATM is driven by the requirements of multimedia systems and this book illustrates the new emphasis by bringing telecommunication and computer communication experts together with application designers. This is particularly true for the security issues also addressed here. Last but not least, modeling techniques and mathematical models are essential to assess the performance of the networks to be built and to evaluate next century scenarios unachievable by a simple scaling of today's solutions. High-Performance Networks for Multimedia Applications is a collection of high quality research papers and the in-depth treatment of the subjects provides interesting and innovative solutions. It is an essential reference for telecommunication and computer experts and QoS-based application designers. It is also a comprehensive text for graduate students in high-perforrnance networks and multimedia applications.

This book constitutes the refereed proceedings of the International Workshop on Trends in Distributed Systems, TreDS '96, held in Aachen, Germany, in October 1996.
The 21 revised full papers presented were carefully selected from a total of 51 submissions; also included is an invited paper by Sape Mullender and Paul Sijben on quality of service in distributed multimedia systems. Beyond the topic of the CORBA architecture and implementations, the book addresses interoperability issues, formal methods, multimedia communication services, distributed object systems, coordination protocols, reuse, workflow management, etc.

High-Speed Networking for Multimedia Applications presents the latest research on the architecture and protocols for high-speed networks, focusing on communication support for distributed multimedia applications. This includes the two major issues of ATM Networking and quality of service for multimedia applications. It is to be expected that most of the bandwidth in future high-speed networks will be taken up by multimedia applications, transmitting digital audio and video. Traditional networking protocols are not suitable for this as they do not provide guaranteed bandwidth, end-to-end delay or delay jitter, nor do they have addressing schemes or routing algorithms for multicast connections. High-Speed Networking for Multimedia Applications is a collection of high quality research papers which address these issues, providing interesting and innovative solutions. It is an essential reference for engineers and computer scientists working in this area. It is also a comprehensive text for graduate students of high-speed networking and multimedia applications.

Multimedia data streams will form a major part of the new generation of applications in high-speed networks. Continuous media streams, however, require transmission with guaranteed performance. In addition, many multimedia applications will require peer-to-multipeer communication. Guaranteed performance can only be provided with resource reservation in the network, and efficient multipeer communication must be based on multicast support in the lower layers of the network. Architecture and Protocols for High-Speed Networks focuses on techniques for building the networks that will meet the needs of these multimedia applications. In particular two areas of current research interest in such communication systems are covered in depth. These are the protocol related aspects, such as switched networks, ATM, MAC layer, network and transport layer; and the services and applications. Architecture and Protocols for High-Speed Networks contains contributions from leading world experts, giving the most up-to-date research available. It is an essential reference for all professionals, engineers and researchers working in the area of high-speed networks.

High-Performance Networks for Multimedia Applications presents the latest research on the services and protocols for networks providing the communication support for distributed multimedia applications. The need for end-to-end QoS for these multimedia applications is raising the stakes for a powerful shaping and scheduling in the network adapter. It is also creating a need for new services at the ATM layer, CBR and VBR being augmented by UBR, ABR and GFR which have to be evaluated in the TCP/IP environment of today and tomorrow. With the pressure of all the new technologies available today, the backbone architecture needs to be revisited and the success of the TCP/IP must not eliminate the possibility of adding a native ATM access to it. Most of the research in communication services such as IntServ, DiffServ and Native ATM is driven by the requirements of multimedia systems and this book illustrates the new emphasis by bringing telecommunication and computer communication experts together with application designers. This is particularly true for the security issues also addressed here. Last but not least, modeling techniques and mathematical models are essential to assess the performance of the networks to be built and to evaluate next century scenarios unachievable by a simple scaling of today's solutions. High-Performance Networks for Multimedia Applications is a collection of high quality research papers and the in-depth treatment of the subjects provides interesting and innovative solutions. It is an essential reference for telecommunication and computer experts and QoS-based application designers. It is also a comprehensive text for graduate students in high-perforrnance networks and multimedia applications.

Dieses Lexikon bietet anschauliche und verstandliche Informationen betreffend der theoretischen Informatik, Rechnerarchitekturen und Hardware, Softwaretechnologie, Informationssysteme und Datenbanken, kunstliche Intelligenz, graphische Datenverarbeitung, Burosysteme, Kommunikationstechnik, Nachrichtentechnik sowie Anwendungen informationstechnischer Systeme fur Sprachverarbeitung, Simulation im Umweltschutz, Datensicherheit und Zuverlassigkeit informationstechnischer Systeme."

Aufgrund der der Tagung nachfolgenden Herausgabe des vorlie- genden Bandes II gerat das Vor- zum Nachwort und die Erwartung der Beteiligten verwandelt sich in die Erinnerung an das Gehor- te und Gesehene. Die erstmals in Karlsruhe mit der Universitat und dem FhG-IITB als lokalen Organisatoren veranstaltete GI/NTG- Tagung wies gegenUber der Berliner Tagung 1983 mit 54 Vortragen ein urn ca. 20% erweitertes Angebot aus, wahrend die Teilnehmerzahl mit rund 500 in etwa gleich geblieben war. Erfreulich war die aus- landische Beteiligung mit 8 Vortragen und Teilnehmern aus 7 weiteren Landern. Der zunehmende Umfang des Veranstaltungspro- gramms schlagt sich nicht zuletzt im Volumen der Tagungsbande nieder, welches von anfanglich 338 Seiten(1979) unaufhaltsam auf jetzt 927 Seiten(1985) angewachsen ist. Dies war der ver- lagstechnische Grund ftir die Aufteilung in zwei Bande, was je- doch die Chance eroffnete, aktuellste Beitrage ftir die Tagung zu gewinnen und zu publizieren. Die Veranstaltung wurde traditionell eingeleitet mit einem 1 1/2 tagigen Tutorium. Dieses wurde von acht Referenten aus Hochschule und Industrie bestritten, welche praxisnah tiber den Stand der Normung, Weitverkehrsnetze ebenso wie lokale Netze, Message- Handling- Systeme und Netz- Management vortrugen. Die ca. 250 Teilnehmer erhielten einen aktuellen Uberblick, welcher tiberdies in gedruckter Form als Tutoriumsband verftigbar ist.

Die Veranstaltungen der GI/NTG-Fachgruppe "Rechnernetze" haben mittlerweile schon Tradition: sie sind die mit Abstand groBte Reihe von wissenschaftlichen Konferenzen zum Bereich "Kommunikation in verteilten Systemen" im deutschsprachigen Raum. Auch die zunehmende Zahl von kommerziellen Kongressen hat ihre Attraktivitat nicht schma- l ern konnen. Die Dokumentation der bisherigen Tagungen (IFB-Bande 22, 40 und 60) enthielten immer eine FUlle von Grundlagenuntersuchungen, Erfahrungsberichten sowie Informationen Uber zukUnftige Entwicklungen. Sie initialisierten Diskussionen Uber alle Themen des Bereichs Datenkommunikation meist lange bevor die betreffenden Sachfragen einer groBeren Offentlichkeit bekannt wurden und verschafften damit den Tagungsteilnehmern und auch den Lesern der Konferenzbande einen unschatzbaren Informationsvorsprung. Dasselbe wird sicher rUckwirkend auch von der jetzigen Konferenz gesagt werden konnen, bei der die Aspekte der Anwendung und des Betriebs im Vordergrund stehen. Schwerpunkte sind die Themenbereiche "Netze und Netzverbunde" sowie "Kommunikations- dienste", denen jeweils mehrere Sitzungen gewidmet sind. Mit dem durch die Ein- fUhrungen neuer Technologien verursachten Strukturwandel un serer Gesellschaft und seinen Auswirkungen befassen sich mehrere Referate vor allem in der Eroffnungs- und SchluBsitzung. Obwohl ein groBer Teil der Vortragsmeldungen nicht angenommen wurde, war es erstmals erforderlich, fast durchgehend Parallelsitzungen zu veranstalten und die Referate auf zwei Tagungsbande aufzuteilen; auch dies dokumentiert das breite Spektrum und die Bedeutung der behandelten Thematik.

Dieses Buch entstand aus einer Reihe von Vorlesungen und Seminaren an der Universitat Saarbrlicken. Es enthalt eine vergleichende Be- schreibung von schnellen und kostenglinstigen Algorithmen zur Reali- sierung arithmetischer Operationen in Digitalrechnern. Obwohl fast aIle Informatiker und nicht wenige Wissenschaftler an- derer Fachrichtungen mit diesen Problemen mehr oder weniger inten- siv konfrontiert werden, behandeln deutschsprachige Fachblicher mit allgemeinerer Zielsetzung diese Fragen nur am Rande oder in ver- gleichsweise kurzen Kapiteln; dies flihrt zwangslaufig zu einer Be- schrankung auf die Beschreibung der bekanntesten und einfachsten Verfahren. In der englischsprachigen Literatur gibt es zwar mehre- re ausgezeichnete Standardwerke (zu erwahnen ist hier in erster Li- nie Flores "The Logic of computer Arithmetic"), doch sind diese oft nur schwer zuganglich und meist alteren Datums; viele wichtige Re- sultate wird man dort also vergeblich suchen. Der Mangel an neueren Blichern liber Rechnerarithmetik kann nicht dar auf zurlickgeflihrt werden, daB aIle interessierenden Probleme be- reits in Standardwerken abgehandelt sind: die Anzahl und die Rele- vanz der in jlingster Zeit veroffentlichten Arbeiten beweist das Ge- genteil. Die Hauptursache daflir liegt nach meiner Ansicht vielmehr in der oft uneinheitlichen Darstellung und der zu starken Beschran- kung vieler Arbeiten auf ein bestimmtes Maschinenkonzept oder auf eine zur Zeit verfligbare bzw. in Entwicklung befindliche Baustein- serie, wodurch eine zusammenfassende Ubersicht sehr erschwert wird.