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Auflistung nach Autor:in "Wienhofen, Leendert W. M."

1 - 10 von 25
  • Editiertes Buch
  • Konferenzbeitrag
    Challenges 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.
  • Konferenzbeitrag
    Challenges 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.
  • Konferenzbeitrag
    Co-living social community for elderly
    (12th International Conference on Innovative Internet Community Services (I2CS 2012), 2012) Mathisen, Bjørn Magnus; Kofod-Petersen, Anders; Olalde, Idoia
    With a rapidly increasing elderly population, keeping elderly healthy is more important than ever. Physical and social activity is closely related to people's well-being. This paper describes some of the challenges faced when activating elderly people in an organised fashion. We propose a Virtual Collaborative Social Living Community for Elderly; utilising friends, family and care-professionals connected to the elderly in achieving this goal. Challenges related to this work in progress is then presented. The paper presents experiences made in an ongoing development and deployment of a socio-technical system.
  • Konferenzbeitrag
    Context-awareness and real-time information in an intelligent smartphone application
    (12th International Conference on Innovative Internet Community Services (I2CS 2012), 2012) Marcussen, Christoffer Jun; Eliassen, Lars Moland; Sætre, Rune; Gambäck, Björn
    With the constant increase in smartphone sales, integrated sensors and map navigation have now become available to the average user. This allows for mobile applications to use context-awareness to provide more relevant information. An interesting use-case for such applications is a route information system for buses. The paper describes an application which interfaces over a mobile phone to Bus- TUC, a natural language-based reasoning-system for bus routes in Trondheim. By combining user context, BusTUC reasoning and real-time data from the bus service provider, the user-interaction is simplified, compared to a standard information system. We discuss issues on supporting context-awareness and real-time information in this system, comparing it to other available route information systems. Feedback from beta-testers indicates that the application suits the needs of typical bus travellers well.
  • Konferenzbeitrag
    Creation and management of community-specific knowledge domain taxonomies
    (12th International Conference on Innovative Internet Community Services (I2CS 2012), 2012) Eichler, Gerald; Schwaiger, Roland
    The semantic understanding of domain-specific terminology typical for communities, like a scientific conference, requires both, the analysis of daily spoken and written language in documents. A living taxonomy can help to cluster knowledge and classify questions against it, as well as to build up profiles of expertise. Text analysis modules support the parsing of training materials to extract a significant set of key phrases. However, the creation of a balanced categorisation tree requires the experience of community members. The Spree project introduces an OntoEditorTM to optimize automatic and manual processes to setup an expert finding & communication application, following well-known Web 2.0 paradigms.
  • Konferenzbeitrag
    Detecting source topics by analysing directed co-occurrence graphs
    (12th International Conference on Innovative Internet Community Services (I2CS 2012), 2012) Kubek, Mario; Unger, Herwig
    This paper describes a new method to determine the sources of topics, that influence the main topics in texts, by analysing directed co-occurrence graphs using an extended version of the HITS algorithm. Additionally, this method can be used to identify characteristic terms in texts. In order to obtain the needed directed term relations the notion of term association is introduced to cover asymmetric reallife relationships between concepts and it is described how they can be calculated by statistical means. In the experiments, it is shown that the detected source topics and the characteristic terms can be used to find similar documents and documents that mainly deal with them in large corpora like the World Wide Web. In doing so iteratively, it is possible to easily follow topics by analysing documents from these corpora using this method. This way, users can be offered this new search function in interactive search systems that goes beyond a simple presentation of similar documents. This application will be elaborated on as well.
  • Konferenzbeitrag
    Drizzle: the RAIN prototype
    (12th International Conference on Innovative Internet Community Services (I2CS 2012), 2012) Jaatun, Martin Gilje; Askeland, Christian Emil; Salvesen, Anders Emil
    Internet communities are moving to the Cloud, but in addition to the advantages regarding cost and convenience, this also means that cloud service providers are increasingly in a position to aggregate large amounts of personal data, which means that it is becoming prudent to develop mechanisms that can contribute to limiting the information available to providers. In this paper we present a prototype cloud security solution for protection against an “honest but curious” cloud provider. The solution is based on splitting up data and distributing it to multiple cloud providers, without encrypting the individual pieces. Our initial tests indicate that our solution is sufficiently efficient for normal use.
  • Konferenzbeitrag
    Impact of application layer over wireless sensor networks
    (12th International Conference on Innovative Internet Community Services (I2CS 2012), 2012) Ramassamy, Cédric; Fouchal, Hacène; Hunel, Philippe
    Applications over Wireless Sensor Networks (WSNs) are various and different. Many routing protocols have been proposed for WSNs since a many years. Medium Access Control (MAC) protocols can differ from a network to another. The transmission range can also be variable from a sensor to another depending on their battery capacities. All these various protocols have an influence on the WSNs. It is worthy to choose the appropriate protocol for each specific situation in order to ensure high security of the network. In this paper, we show that the type of applications has a real impact on WSN. In- deed, each kind of application with a specific routing protocol, MAC layer and transmission range value impact on security of network in terms of packets lost rate. We have undertaken a set of experimentations in order to show the importance of an appropriate configuration to deploy a WSN with a high security confidence degree. For the application layer, we have handled three types of applications. For the routing layer, we have handled only with AOMDV protocol. For MAC layer we use 802.15.4 protocols. We have conducted many simulations through the NS-2 simulator in order to analyze one relevant security indicators on WSNs: lost packet rate.
  • Konferenzbeitrag
    Integrating the individual vehicle in the transport system using open services in a distributed architecture
    (12th International Conference on Innovative Internet Community Services (I2CS 2012), 2012) Moseng, Tor K.; Natvig, Marit
    Road traffic management has traditionally been targeted through control and monitoring of the flow of vehicles, using the same measures towards all vehicles. As vehicles can have very different capabilities and profiles, it is however desired to use different control strategies towards the individual vehicles to meet the environmental, safety and efficiency targets for the future. SMARTFREIGHT has developed a holistic control and monitoring tool for managing the traffic, and individual vehicles in particular. The individual vehicle is integrated with the traffic management and freight distribution management centers by using open service interfaces for an interoperable information exchange between distributed systems across a heterogeneous wireless infrastructure. SMARTFREIGHT realized and successfully demonstrated this integration in its final event in Trondheim.