Udo Bleimann

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The paper considers the requirement for information security within the domain of online distance learning. A generic module structure is presented which represents a high level abstraction of the different stages of the educational process. This leads into a discussion of the main security issues that must be considered at each stage. These various(More)
Atlantis University is an ambitious international project in the area of learning and is currently being developed by a group of universities and companies. It combines three different types of learning and teaching to form a single package offered to students and people in the workplace alike: face-to-face learning, e-learning and project-based learning.(More)
Both, surveillance of the market and studies of ongoing research and standardisation work show that the evolution from traditional telecommunication networks (such as ISDN) towards NGN (Next Generation Networks) currently takes place. SIP (Session Initiation Protocol) as an IP-based signalling protocol plays a major role in future NGN-based(More)
This paper addresses the identification of NGN (Next Generation Networks) user terminals experiencing similar QoS (Quality of Service) conditions. This information is useful regarding the identification of adequate QoS monitoring points in order to provide a resource-saving QoS monitoring approach. An ART 2 neural network has been evaluated for the(More)
Today's standardised approaches for the control of QoS (Quality of Service) in NGN (Next Generation Networks) come along with a high volume of additional, unscalable traffic for the allocation and reservation of network resources within the IP transport network. This paper describes a new framework for comprehensive QoS control in SIP-based (Session(More)
This paper presents an approach to security policy enforcement with collaborative business processes defined using BPEL and deployed across enterprise domain boundaries for execution. The assessment of compliance with security policies at the location where a BPEL script is to be executed is facilitated by re-formulating the security policies with respect(More)
This paper proposes a hybrid approach for managing knowledge within companies based on communication between people. In addition to traditional Knowledge Management Systems our concept supports employees not only in finding information but also in establishing contact between the person requesting information and a person or community that can help solve(More)