Auflistung nach Autor:in "Unger, Herwig"
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- Konferenzbeitrag3DIOS1 – Konzept eines Internet-Operating-Systems(Workshop Gemeinschaften in Neuen Medien (GeNeMe) 2009, 2009) Coltzau, Hauke; Unger, HerwigEs wird ein Konzept für ein zukünftiges Betriebssystem vorgestellt, das den Anforderungen und Möglichkeiten der zunehmenden Vernetzung von Rechnern und anderen Endgeräten Rechnung trägt. Es erweitert den bekannten Grundgedanken, mit Hilfe von Peer-to-Peer Technologien explorierbare virtuelle 3D-Landschaften zu erzeugen, ohne dabei von einem zentralen Anbieter abhängig zu sein. Es soll Nutzern die Möglichkeit bieten, das Serviceangebot im Internet ohne Einschränkungen zu durchsuchen und dabei anhand eigener semantischer Kriterien die für sie interessanten Services hervorzuheben. Über Parameter der Darstellung sollen Netzwerkeigenschaften, die für den Nutzer von Belang sein können, intuitiv erfassbar sein. Das System beinhaltet darüber hinaus Möglichkeiten zur Last- und Verkehrsbalancierung. In diesem Artikel werden Anforderungen an die zu Grunde liegende Infrastruktur und die grafische Benutzeroberfläche definiert, erste Skizzen des zukünftigen Systems vorgestellt und die weiteren Schritte bis zur Verwirklichung eines Prototyps diskutiert.
- KonferenzbeitragActors–media–qualities: a generic model for information retrieval in virtual(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Heinrich, GregorThe article presents a model of the structural properties of virtual communities and the information they can access. It argues that a large part of the information – and actually knowledge – present in virtual communities can be identified by a graph structure that consists of three node types – actors, media and qualities – as well as the relations that connect them. Based on these relations, information retrieval and other inference mechanisms can be mapped into the model.
- KonferenzbeitragAd-hoc community composition of rescue forces in action situations(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Schau, Volkmar; Kirchner, Kathrin; Erfurth, Christian; Eichler, GeraldSecure energy and transport networks, Internet and telecommunications, are vital nerves of our highly networked society. Global mobility makes it difficult to combat and natural disasters and technological accidents can cause serious damage in a closer-knit world. In this paper we introduce the challenges in dynamic community composition of heterogeneous rescue forces (culture clash) for rescue and protection tasks and discuss our approach in the context of the "SpeedUp project" how to present a solution for ad-hoc communication, situation-aware representation, tracking and guiding in dynamic inhomogeneous communities.
- KonferenzbeitragAdaptation process for ad hoc routing protocol(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Yawut, Cholatip; Paillassa, Béatrice; Dhaou, RiadhBecause of several constraints in ad hoc networks, an adaptive ad hoc routing protocol is increasingly required. In this paper, we propose a synopsis of an adaptation process for an adaptive ad hoc routing protocol. Next, we put into practice the analysis of the process of adaptation to mobility by realizing an adaptive routing protocol: CSR (Cluster Source Routing) which is an extension of a widely used ad hoc routing protocol: DSR (Dynamic source Routing). Mobility and density metrics are considered to CSR<->DSR mode switching, it moves from a flat architecture working in DSR to a virtual hierarchical architecture. With this mode switching, CSR can enhance the scalability of the DSR routing protocol.
- KonferenzbeitragAdaptive Datenverwaltung im Internet(Workshop Gemeinschaften in Neuen Medien (GeNeMe) 2001, 2001) Wulff, Markus; Unger, HerwigMit der ständig wachsenden Bedeutung des Internets als Medium für Kommunikation und Datenverarbeitung werden auch Qualitätsmerkmale wie Verfügbarkeit, Zuver-lässigkeit und Sicherheit immer wichtiger. Das gilt insbesondere für die Anwendung im Rahmen des e-Business und anderer kommerzieller Anwendungen [13].
- KonferenzbeitragAn adaptive policy routing with thermal field approach(9th International Conference On Innovative Internet Community Systems I2CS 2022, 2009) Lertsuwanakul, Lada-On; Unger, HerwigThis paper introduces an adaptive routing approach based on buffer status and distance in a mesh overlay network: Thermal Field is used for considering buffer stage and distance is applied to select routing policy. The path selection process considers the Thermal Field as a metaphor for the buffer usage based on probability in order to avoid message loss by overloaded peers or delay because of big queues, otherwise routing by the shortest way. In addition, the probability of Thermal Field consideration relies on leftover distance to the target instead of using a global constant. The experiment results substantiated our approach using the adaptive probability of routing mechanism works effectively.
- KonferenzbeitragAn algorithm for detecting communities in folksonomy hypergraphs(11th International Conference on Innovative Internet Community Systems (I2CS 2011), 2011) Bothorel, Cécile; Bouklit, MohamedIn this article, we are interested in social resource sharing systems such as Flickr, which use a lightweight knowledge representation called folksonomy. One of the fundamental questions asked by sociologists and actors involved in these online communities is to know whether a coherent tags categorization scheme emerges at global scale from folksonomy, though the users don't share the same vocabulary. In order to satisfy their needs, we propose an algorithm to detect clusters in folksonomies hypergraphs by generalizing the Girvan and Newman's clustering algorithm. We test our algorithm on a sample of an hypergragh of tag co-occurrence extracted from Flickr in September 2006, which gives promising results.