Search for dissertations about: "computer science 2009"

Showing result 1 - 5 of 140 swedish dissertations containing the words computer science 2009.

  2. 1. A Study of Combinatorial Optimization Problems in Industrial Computer Systems

    Author : Markus Bohlin; Björn Lisper; Per Kreuger; Mikael Sjödin; Petru Eles; Mälardalens högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Computer science; Datalogi; Computer Science; datavetenskap;

    Abstract : A combinatorial optimization problem is an optimization problem where the number of possible solutions are finite and grow combinatorially with the problem size. Combinatorial problems exist everywhere in industrial systems. READ MORE

  4. 2. Enabling Multimedia Services over Wireless Multi-Hop Networks

    Author : Marcel Cavalcanti de Castro; Andreas Kassler; Torsten Braun; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Wireless Multi-hop Networks; Mobile Ad-hoc Networks; Wireless Mesh Networks; Voice over IP; Session Initiation Protocol; Peer-to-Peer Overlay Networks; Computer science; Datavetenskap; Datavetenskap; Computer Science;

    Abstract : With the constant development of wireless technologies, the usageof wireless devices tends to increase even more in the future.Wireless multi-hop networks (WMNs) have emerged as a keytechnology to numerous potential scenarios, ranging from disasterrecovery to wireless broadband internet access. READ MORE

  5. 3. Towards Secure SIP Signalling Service for VoIP applications : Performance-related Attacks and Preventions

    Author : Ge Zhang; Simone Fischer-Hübner; Costas Lambrinoudakis; Karlstads universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; SIP; VoIP; Security; Computer science; Datavetenskap; Datavetenskap; Computer Science;

    Abstract : Current Voice over IP (VoIP) services are regarded less secure than the traditional public switched telephone network (PSTN). This is due to the fact that VoIP services are frequently deployed in an relatively open environment so that VoIP infrastructures can be easily accessed by potential attackers. READ MORE

  6. 4. Cognition reversed : Robot learning from demonstration

    Author : Erik Billing; Lars Erik Janlert; Thomas Hellström; Tom Ziemke; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Computer science; Datavetenskap; Cognitive science; Kognitionsvetenskap; computer and systems sciences; data- och systemvetenskap;

    Abstract : The work presented in this thesis investigates techniques for learning from demonstration (LFD). LFD is a well established approach to robot learning, where a teacher demonstrates a behavior to a robot pupil. This thesis focuses on LFD where a human teacher demonstrates a behavior by controlling the robot via teleoperation. READ MORE

  7. 5. Computer Modelling of Neuronal Interactions in the Striatum

    Author : Johannes Hjorth; Jeanette Hellgren Kotaleski; Kevin Gurney; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; striatum; fast spiking interneurons; medium spiny projection neurons; gap junctions; interoperability; MUSIC; Computer science; Datavetenskap;

    Abstract : Large parts of the cortex and the thalamus project into the striatum,which serves as the input stage of the basal ganglia. Information isintegrated in the striatal neural network and then passed on, via themedium spiny (MS) projection neurons, to the output stages of thebasal ganglia. READ MORE