Tuomas Nurmela

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The present emergence of loosely-coupled, inter-enterprise collaboration, i.e., virtual organizations calls for new kind of middleware: generic, common facilities for managing contract-governed collaborations and the autonomous business services between which those collaborations are formed. While further work is still needed on the functional governance of(More)
Engineering extended service-oriented architecture (SOA) –based web services for open environments that support collaboration sets numerous requirements to web services languages and support infrastructure capabilities provided by vendors. Issues such as composition and management of services become important, yet neither web services or the vendor platform(More)
Session Initiation Protocol, SIP, provides controlplane signaling for the IP networks. SIP enables initiating, modifying and terminating sessions for a user, while maintaining neutrality to physical media capabilities and using other protocols to negotiate these. SIP assumes that the transport layer is inherently unreliable and as such provides transport(More)
The Virtual organizations seminar is embedded in the research and educational agenda of the Cinco research group. This report is based on the seminar presentations, and studies various relevant research topics and projects contributing to the field of virtual organization research. Computing Reviews (1998) categories and subject descriptors: H.4 Information(More)
Extended service-oriented architecture –based web services for open environments sets numerous requirements. Issues such as composition and management of services become important, yet neither web services nor the current commercial platforms contain the required capabilities, let alone are mature enough for production use. This paper focuses in particular(More)
Web Services are being adopted for integration, yet to enable a fullblown service-oriented architecture approach for federated service management, a comprehensive support infrastructure is required. Focusing on service level management in the service management arena, this paper describes a frame of reference and uses it to evaluate service level management(More)
Increasing dependence of business on 24/7 IT systems sets requirements to support recovery from hardware, software and operational errors and reduce number and length of maintenance windows through online and automated or semi-automated system management activities. These requirements cannot be satisfied purely by technology let alone a single technological(More)
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