-
Farooqui, K.; Logrippo, L.; Meer, J.de: ¬The ISO reference model for open distributed processing : an introduction (1995)
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- Abstract
- The IOS rererence model of open distributed processing (RM-ODP) consists of: an overview of the reference model, the descriptive model, the prescriptive model, and the architectural semantics. They provide the concepts and rules of distributed processing to ensure openness between interacting distributed application components. Openness is a combination of characteristics: accessibility, heterogeneity, autonomy and distribution. The RM-ODP introduces the concept of viewpoint to describe a system from a particular set of concerns, and hence to deal with the complexity of distributed systems. While all the viewpoints are relevant to the description and design of distributed systems, the computational and engineering models are the ones that bear most directly on the design and implementation of distributed systems. From a distributes software engineering point of view, the computational and engineering viewpoints are again the most important; they reflect the software structure of the distributed application most closely. Concentrates on the computational and engineering viewpoints
-
Scheuerer, J.: Onlinebanking (1997)
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- Date
- 1. 8.1997 14:03:29
- Source
- Com!. 1997, H.8, S.22-24
-
Deussen, N.: Sogar der Mars könnte bald eine virutelle Heimat bekommen : Gut 4,2 Milliarden sind nicht genug: Die sechste Version des Internet-Protokolls schafft viele zusätzliche Online-Adressen (2001)
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- Abstract
- Der Geniestreich aus dem Europäischen Labor für Teilchenphysik (Cern) in Genf machte aus dem Wissenschaftsnetz ein Massenmedium. Zudem erfuhr die elektronische Post einen Aufschwung. Das Wachstum der Netze sprengt alle Erwartungen", resümiert Klaus Birkenbihl vom InformatikForschungszentrum GMI). Jede Web-Site, jede E-Mail-Box, jeder Computer, der per Standleitung online ist, braucht eine eindeutige Identifizierung. Die Schätzungen, wie viele IPv4-Adressen noch frei sind, schwanken zwischen 40 und zehn Prozent. Der Verbrauch jedenfalls steigt rasant: Die Anzahl der WebSites steuert derzeit auf eine Milliarde zu, weit mehr Netznummern gehen bereits für E-Mail-Anschriften drauf. Den Adressraum weiter ausschöpfen werden demnächst die intelligenten Haushaltsgeräte. Der Laden an der Ecke will wissen, welcher Kühlschrank die Milch bestellt hat, die Videozentrale braucht für das Überspielen des Films die Kennung des PC-Recorders, der Computer des Installateurs benötigt die IP-Anschrift der Heizungsanlage für die Fernwartung. Handys, die später Nachrichten übers Internet schicken, und Internet-Telefonie gehen möglicherweise leer aus. Doch bevor Internet-Adressen zur heiß begehrten Schieberware werden, soll ein neues Adresssystern mit mehr Möglichkeiten her. Schon 1990 hatte sich die Internet Engineering Task Force (IETF) Gedanken über einen neues Internet-Protokoll mit einem größeren Adressangebot gemacht. Im IETF kümmern sich Forscher, Soft- und HardwareIngenieure um die fortlaufende Verbesserung von Architektur und Arbeit des Netz werks. Eine ihrer Arbeitsgruppen prognostizierte, der IPv4-Vorrat gehe 2005 zu Ende. Fünf Jahre dauerte es, dann waren sich alle Internet-Gremien einig: Eine neue Protokollversion, IPv6, muss her. Dann passierte weiter nichts. Endlich verkündete 1999 Josh Elliot von der Icann, ab sofort würden neue Anschriften verteilt. Ein historischer Moment", freute er sich.
- Source
- Frankfurter Rundschau. Nr.79 vom 3.4.2001, S.29
-
Duhm, U.: Ring frei zur nächsten Runde (1999)
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- Date
- 1. 8.1997 14:03:29
19. 2.1999 20:21:22
-
Lynch, C.A.: ¬The Z39.50 information retrieval standard : part I: a strategic view of its past, present and future (1997)
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- Abstract
- The Z39.50 standard for information retrieval is important from a number of perspectives. While still not widely known within the computer networking community, it is a mature standard that represents the culmination of two decades of thinking and debate about how information retrieval functions can be modeled, standardized, and implemented in a distributed systems environment. And - importantly -- it has been tested through substantial deployment experience. Z39.50 is one of the few examples we have to date of a protocol that actually goes beyond codifying mechanism and moves into the area of standardizing shared semantic knowledge. The extent to which this should be a goal of the protocol has been an ongoing source of controversy and tension within the developer community, and differing views on this issue can be seen both in the standard itself and the way that it is used in practice. Given the growing emphasis on issues such as "semantic interoperability" as part of the research agenda for digital libraries (see Clifford A. Lynch and Hector Garcia-Molina. Interoperability, Scaling, and the Digital Libraries Research Agenda, Report on the May 18-19, 1995 IITA Libraries Workshop, <http://www- diglib.stanford.edu/diglib/pub/reports/iita-dlw/main.html>), the insights gained by the Z39.50 community into the complex interactions among various definitions of semantics and interoperability are particularly relevant. The development process for the Z39.50 standard is also of interest in its own right. Its history, dating back to the 1970s, spans a period that saw the eclipse of formal standards-making agencies by groups such as the Internet Engineering Task Force (IETF) and informal standards development consortia. Moreover, in order to achieve meaningful implementation, Z39.50 had to move beyond its origins in the OSI debacle of the 1980s. Z39.50 has also been, to some extent, a victim of its own success -- or at least promise. Recent versions of the standard are highly extensible, and the consensus process of standards development has made it hospitable to an ever-growing set of new communities and requirements. As this process of extension has proceeded, it has become ever less clear what the appropriate scope and boundaries of the protocol should be, and what expectations one should have of practical interoperability among implementations of the standard. Z39.50 thus offers an excellent case study of the problems involved in managing the evolution of a standard over time. It may well offer useful lessons for the future of other standards such as HTTP and HTML, which seem to be facing some of the same issues.
-
Petry, W.; Werner, H.-J.: Anwendertraum: Kommunikations- und Retrieval-Software im Vergleich (1993)
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- Source
- Cogito. 9(1993) H.2, S.18-22
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Eberl, U.: UMTS++ : Perspektiven (2001)
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- Date
- 31.12.1996 19:29:41
-
Petry, W.: Datenreisen billiger : wie man Telekommunikationskosten sparen kann (1994)
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- Source
- Cogito. 10(1994) H.4, S.17-22
-
Matthews, J.R.; Parker, M.R.: Local Area Networks and Wide Area Networks for libraries (1995)
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- Date
- 30.11.1995 20:53:22
-
Kniszewski, P.: T-Online hat die Nase vorn (1997)
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- Date
- 1. 8.1997 14:03:29
-
¬Die 50 besten Tips zur neuen Software : T-Online 2.0, Netscape Navigator, Microsoft Internet-Explorer (1997)
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- 1. 8.1997 14:03:29
-
Durchstarten mit dem T-Online-Lotsen : neue Startseite (1997)
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- 1. 8.1997 14:03:29
-
Pelton, J.N.: Telekommunikationssysteme des nächsten Jahrhunderts (1998)
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- Date
- 31.12.1996 19:29:41
-
Lang, M.: Neue Hardware braucht das UMTS-Land : Infrastruktur (2001)
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- 31.12.1996 19:29:41
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Otten, D.: Peilstation in der Westentasche (2001)
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- 31.12.1996 19:29:41
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Sterbak, R.: ¬Die Mega-Handys : Endgeräte (2001)
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- 31.12.1996 19:29:41
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Zöbelein, K.: Dringend gesucht : die Killer-Applikation (2001)
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- 31.12.1996 19:29:41
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Berezak-Lazarus, N.: ADSL - Auf der Überholspur durch die Multimedia-Welt (1999)
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- Footnote
- Rez. in: Internet Professionell 2000, H.2, S.22
-
Rötger, A.: ¬Die Schrittmacher : Standards (2001)
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- Date
- 31.12.1996 19:29:41
-
Cerf, V.G.: Netztechnik (1995)
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- Pages
- S.22-31
