We present the development of a multi-touch display based on computer vision techniques. The developed system is built upon low cost, off-the-shelf hardware components and a careful selection of computer vision techniques. The resulting system is capable of detecting and tracking several objects that may move freely on the surface of a wide projection screen. It also provides additional informa...

Multi-spectral imaging methods give the possibility to detect damages, like moisture and natural cover (e.g. moss), on surfaces of building structures. An Infrared Vidicon system and two digital cameras have been tested concerning their applicability for multispectral analysis. The results of the evaluation with multi-spectral image classification are compared. Digital cameras simplify the acqu...

In recent years, various mobile middleware systems have been developed that build on top of the protocol stack provided by the underlying network operating system, to offer a set of higher level services. Common services provided include remote procedure calls, data sharing, service discovery etc. With the number of mobile devices, such as PDAs, mobile phones or smart phones increasing, as well...

Building very large computing systems is extremely challenging, given the lack of scalable communication technologies. This threatens a new generation of mission-critical but very large computing systems. Fortunately, a new generation of “gossip-based” or epidemic protocols can overcome scalability problems, offering security and reliability even in the most demanding settings. Epidemic protoco...

Even though development of a new operating system is rarely a good (business) plan, in a small scale it could be a fruitful experiment in software engineering. In this document we describe results of our effort to build a dependable operating system. By adopting and building upon recent advances in the programming language design, we show one possible way how can we reduce development costs of ...

Guan, N. 2013. New Techniques for Building Timing-Predictable Embedded Systems. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology 1094. 45 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-554-8797-3. Embedded systems are becoming ubiquitous in our daily life. Due to close interaction with physical world, embedded systems are typically su...

Sea-going ships are autonomous complex objects that are intensively automatized due to safety and economic factors. The issue is complicated enough to entail a need for powerful methods such as Artificial Intelligence techniques. This repon gives a brief description of several problems of ship-building for which Artificial Intelligence techniques seem to be particularly suitable. They include: ...

Early work on case based reasoning reported in the literature shows the importance of case base maintenance for successful practical systems. Different criteria to the maintenance task have been used for more than half a century. In this paper we present different sort out techniques for case base maintenance. All the sort out techniques proposed are based on the same principle: a Rough Sets co...