A linear quadratic control problem is considered, where several different controllers act as a team, but with access to different measurements. The state feedback solution obtained in a previous paper is here extended to output feedback and a separation principle is proved. The condition that certain measurements are unavailable to some state estimators is enforced by imposing a requirement that t

This paper introduces the possibility of increasing the efficiency and minimizing the risk in functions marketing in the aircraft industry by focusing on better control of the logistic parameters. Functions marketing can be described as the marketing of a function rather than a product. The emphasis in this paper will be on the maintenance, i.e. repair and overhaul, of aircraft engines. Functions

The Davies transformation is a method to transform the steering vector of a uniform circular array (UCA) to a vector with Vandermonde form. As this form is similar to that of the steering vector of a uniform linear array (ULA), we can apply to UCAs the many tools that have been developed for ULAs. However, the Davies transformation can be highly sensitive to perturbations of the underlying ideal a

Force feedback (FF) is a technology which is very interesting in the context of human machine interfaces. This as it is usable as a haptic interface, which makes it possible to model and simulate objects and textures. One problem with haptic FF devices today is that most of them are of professional or research standard, which makes them expensive. The technology of FF have also been introduced in

This paper compares grammatical and pragmatic development in foreign language learners of Swedish. For the analysis of grammatical proficiency, data from translation tasks and essays were tested against the stage model proposed in Processability Theory, which identifies five stages of morpho-syntactic development for Swedish (Pienemann 1998, Pienemann and Håkansson 1999). For the pragmatic analysi

The note addresses two issues. First assessing the qualities of information systems and semi-autonomous groups requires a theory or model of how to assess. Second, three levels of assessment - a theoretical, a methodological and a practical level - can be distinguished.

Kritisk granskning av hur pass "revolutionär" 1809 års svenska statsvälvning kan sägas vara.

Popular Abstract in Swedish För att kunna förstå och bedöma exponeringen av kemikalier i miljön, i det här fallet PolyBromeradeDiphenylEtrar (PBDEer), behövs kunskap om källor och flöden från teknosfären till ekosystemen. PBDEer är bromerade flamskyddsmedel som bl a sätts till olika plastmaterial i elektronikanvändning för att förhindra brand. Det används globalt i miljontals kilo och presenteras I have studied the sources, long range transport, and rates of flow of polybrominated diphenyl ethers (PBDEs), from the technosphere to the Baltic ecosystems. PBDEs are mainly used in polymers, which are applied in electrical equipment to prevent overheating or flashover and are produced in large quantities. PBDEs have become widely spread in the environment, where they are able to accumulate in b