Auflistung nach Autor:in "Schau, Volkmar"
1 - 10 von 48
Treffer pro Seite
Sortieroptionen
- Editiertes Buch
- Editiertes Buch
- 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.
- 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.
- KonferenzbeitragAn architecture for smart semantic recommender applications(11th International Conference on Innovative Internet Community Systems (I2CS 2011), 2011) Lommatzsch, Andreas; Plumbaum, Till; Albayrak, SahinWith the growing availability of semantic datasets, the processing of such datasets becomes the focus of interest. In this paper, we introduce a new architecture that supports the aggregation of different types of semantic data and provides components for deriving recommendations and predicting relevant relationships between dataset entities. The developed system supports different types of data sources (e.g. databases, semantic networks) and enables the efficient processing of large semantic datasets with several different semantic relationship types. We discuss the presented architecture and describe an implemented application for the entertainment domain. Our evaluation shows that the architecture provides a powerful and flexible basis for building personalized semantic recommender systems.
- KonferenzbeitragAutomatic web service testing from WSDL descriptions(11th International Conference on Innovative Internet Community Systems (I2CS 2011), 2011) Salva, Sébastien; Rollet, AntoineWeb Services fall under the so-called emerging technologies category and are getting more and more used for Internet applications or business transactions. Currently, there is an important need for validation techniques of web service based architectures. Web services, that are currently proposed into UDDI registries, are not always tested. And for most of them, no specification is provided. So, we propose in this paper, a testing method which can generate test cases only from WSDL descriptions. This method is able to check the following aspects: operation existence, exception management, and session management. We express how to generate test cases and we describe a testing framework, composed of a web service tester, which executes test cases and gives the final test verdict.
- KonferenzbeitragBi-directional distribution of elearning content for cross-technology learning communities(9th International Conference On Innovative Internet Community Systems I2CS 2014, 2009) Zender, Raphael; Dressler, Enrico; Lucke, Ulrike; Tavangarian, DjamshidThis article describes the use of a service-oriented architecture to bridge the gap between different eLearning types and tools. The basic concept is a bi-directional distribution of web services provided by different eLearning environments. This is exemplarily verified by a combination of lectures that are held in a modern media supported lecture room with tools of the computer-aided face-to-face learning paradigm and within a virtual learning environment (Second Life). The new service-based approach allows a flexible and systematic coupling of virtual and face-to-face teaching and learning to a cross-technology learning community.
- KonferenzbeitragChallenges in designing technology for reducing the need for synchronous communication in the perioperative environment(11th International Conference on Innovative Internet Community Systems (I2CS 2011), 2011) Wienhofen, Leendert W. M.; Toussaint, Pieter J.This paper describes health informatics as a field of research and some of the challenges that are faced when designing a complex event processing middleware gathering input from multiple legacy sources in a hospital environment. The goal of the system is to reduce the need for synchronous communication between medical stakeholders by creating a situational awareness and thereby cause fewer interruptions.
- KonferenzbeitragChallenges in health informatics and their relevance to Internet communities(11th International Conference on Innovative Internet Community Systems (I2CS 2011), 2011) Wienhofen, Leendert W. M.Making relevant information available to stakeholders is not an easy task, especially not in a distributed working environment such as a hospital. Digital events do or do not (partially) represent actual real life events and the quality of the aggregation of digital events can not always be guaranteed. Capturing, typing, aggregating and distributing events is a challenge. Many of the problems we see in the hospital are also relevant for internet and mobile communities. Also here we see that people are typically at different places when they communicate and that different communication paradigms are used. Questions such as: “Where is person X?”, “Which information to distribute to whom?” and “Are there any restrictions and if yes, how to impose these?” are as relevant here as in the hospital. During this talk, by means of a real example, parallels between the “hospital community” and other communities will be drawn.