P165 - I2CS: 10th International Conference on Innovative Internet Community Systems - Jubilee Edition 2010 -
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- KonferenzbeitragWeb 2.0 versus enterprise 2.0 - how communities influence today's company culture(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Eichler, GeraldWeb-based communities like the Fotocommunity or MySpace are ubiquitous in many private areas. Heavy PC applications are out, mobile apps are in. With Wikipedia, public knowledge is preserved, and moods are reflected situation-based by Twitter immediately. Content creation complements consumption. But social networks, as formed by facebook, Studi.VZ or Xing, are not limited to private contacts anymore - they become a huge source for data mining and replace news gathering e.g. by Twitter. In 2007, Don Tapscott introduced the term "Wikinomics" to describe how community technologies conquer the business markets. Against the tradition, such technologies coming from the field of collaboration – also known as peer production – infiltrate companies from the base, introduced by the collaborators and not by the management. There are absolutely different methods to handle this, which will be compared. Are the Wiki workplace, the global factory and the co-operative mind the real keys for the business culture of tomorrow?
- KonferenzbeitragA JXTA-based system for adaptive and collaborative learning(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Jung, Hyosook; Ahn, Jinhyun; Park, SeongbinIn this paper, we present an adaptive and collaborative learning system that is based on JXTA technology [jx205, Gon01]. JXTA enables any connected devices in a network to participate in communication and collaboration as peers and our system supports additional functionalities such as adaptive navigation, adaptive group formation, and instant messaging. We tested our system against undergraduate students who took a data structure class. The experimental results indicate that our JXTA-based learning system helped students learn effectively.
- KonferenzbeitragOptimizing Distributed Test Generation(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Gros-Désormeaux, Harry; Fouchal, Hacène; Hunel, PhilippeThis paper presents two optimizations of the master-slave paradigm which provides more robustness. The former uses a mobile master which randomly jumps from node to node in order to dispatch the bandwidth load during the application execution. The latter aims to fully decentralize the paradigm like peer-to-peer systems. We present and experiment our new schemes on an application dedicated to test generation used in protocol engineering. We show that they can help for unknown dynamic environments where no information is given about nodes configuration.
- KonferenzbeitragOn the demand for e-services by health communities(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Dannecker, Achim; Lechner, UlrikeVirtual communities of patients provide health-related information and mutual support for members. This paper presents an analysis of the demand of virtual communities of patients for novel electronic services. Results include the success factors of virtual communities of patients, the demand for electronic services for new and experienced community members and the demand for electronic services for short-term affected and long-term affected patients.
- KonferenzbeitragAn improved Hwang-Lee-Tang remote user authentication scheme(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Ziauddin, SheikhIn this paper, we present a secure and efficient remote authentication scheme by improving Hwang-Lee-Tang's scheme. The security of our scheme is based on the onewayness and collision-resistance properties of the hash functions being used. The proposed scheme is able to withstand all commonly known attacks against remote authentication schemes. In addition, the scheme does not store a password table on the server, provides mutual authentication between the user and the server, does not reveal user's password to the server, allows the user to freely choose a password of her choice, and allows the user to change her password by running a simple protocol with the server.
- 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.
- KonferenzbeitragSystem level test of service-based systems by automated and dynamic load partitioning and distribution(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Caspar, Mirko; Vodel, Matthias; Hardt, WolframLoad generation is a suitable concept for system level test of complex systems. We present a novel approach especially for service based systems. Test scenarios are defined as inputs and describe a quantification of the wanted load to a service. A test-automation component partitions and distributes these abstract load values to a set of clients. These clients execute service requests to generate the calculated load. Since the partition and distribution are done during the test runtime, it can handle a dynamic set of clients with fluctuating resources. The proposed framework will be able to test a wide range of systems. It is aimed to run system level tests under laboratory and field test conditions.
- KonferenzbeitragAutomated robustness testing for reactive systems: application to communicating protocols(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Khorchef, Fares Saad; Berrada, Ismail; Rollet, Antoine; Castanet, RichardIn the telecommunications field, protocols have to be seriously validated before their startup. Thus, it is necessary to test the conformance of a protocol, but it is also important to test its robustness in presence of unexpected events. This paper proposes a framework to test the robustness of a system. Firstly, we explain how to increase the nominal specification in order to take into account the hazards. Then, we show how to generate test sequences from the increased specification. Finally, we propose a case study on the SSL protocol, using the TGSE tool.
- KonferenzbeitragFuzzy logic based routing in grid overlay network(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Lertsuwanakul, Lada-OnWith the aim to improve the quality of service of the modern distributed application, we propose a multi-criteria routing algorithm running in a mesh structured overlay network. Using a grid pattern can improve routing remarkably, since it provides alternative and partly disjunctive paths of equal length as well as the ability to measure distances between nodes in the overlay network. A Thermal Field approach is used to represent buffer stages on the nodes. The decisionmaking algorithms use fuzzy logic techniques to select the optimal path considering multiple constraints. The proposed algorithm is evaluated using P2PNetSim, a network simulation tool. The approach is compared to Shortest Path routing and probability functions using deterministic or adaptive approach. The result of routing with fuzzy logic shows superior routing performance than others both in delivery ratio and routing time.
- KonferenzbeitragOn the convergence of a leader-following discrete-time consensus protocol(10th International Conferenceon Innovative Internet Community Systems (I2CS) – Jubilee Edition 2010 –, 2010) Sodsee, Sunantha; Komkhao, Maytiyanin; Li, Zhong; Halang, Wolfgang A.; Meesad, PhayungA discrete-time consensus protocol with the leader-following control is proposed, which is for agents to follow either static or time-varying reference state of the leader. An agent updates its state based on only the current information available from its neighbors. To estimate the consensus convergence, the eigenvalues are investigated by the Gershgorin's theorem, and simulations will be given to show the effectiveness of the proposed consensus protocol.