This paper treats modelling of power systems with converters in alinear time-periodic framework.A power converter is a nonlinear switching device connecting an ACsystem to a DC system. The converter generates harmonics that mightcause instabilities in systems of this kind. About a nominal periodictrajectory the power converter is well described by a periodic gainmatrix, whereas the power grids oft

Today the Sun is in a relatively uncrowded place. The distance between it and the nearest other star is relatively large (about 200 000 times the Earth-Sun distance!). This is beneficial to life on Earth; a close encounter with another star is extremely unlikely. Such encounters would either remove the Earth from its orbit around the Sun or leave it on an eccentric orbit similar to a comet's. But

This master thesis explores four television plays written and directed by Samuel Beckett: Eh Joe, Ghost Trio, ...but the clouds..., and Night and Dreams. The plays are read in accordance with the film-philosophical approach to cinema outlined in Gilles Deleuze's books on cinema. The master thesis attempts to position these plays as images in relation to the movement- and time-image as well as to t

Abstract in Norwegian På kort har øya Ko Lanta utviklet seg til det stedet i Thailand med flest svensker. Etter tsunami katastrofen i desember 2004 har utviklingen gått fort og migrasjon til øya har blitt veldig populært av ulike grunner. Lokalsamfunnene og områdene som tidligere var bebodd av havnomader og fattige muslimske fiskere er nå i ferd med å bli fortrengt av skan- dinaver som bygger hus

Popular Abstract in Swedish Proteiner är en av kroppens viktigaste beståndsdelar. Proteiner bygger upp stabila nätverk för att cellerna ska ha sin rätta form, de transporterar in vatten, salt och andra molekyler in i cellerna så att vi kan ta upp näring och de katalyserar kemiska reaktioner. Proteiner är uppbyggda av aminosyror som binds ihop till en kedja och som sedan veckar ihop sig så att protSeveral neurodegenerative diseases are caused by peptides or proteins forming amyloid fibrils such as the Aβ peptide involved in Alzheimer’s disease and the huntingtin exon-1 with a prolonged polyglutamine (polyQ) stretch involved in Huntington’s disease. The ability to form amyloid fibrils is an intrinsic feature in all proteins. The fibrils are built up of monomers to form elongated structures w

In this paper two simplified transform based estimators for MIMO OFDM systems using the DFT and an SVD based transform are compared over a tapped delay line channel model. In the resulting symbol error rate plots, it is seen that the DFT based estimator experiences an error floor caused by the mismatch between the discrete time model and a continuous time reality. This error floor becomes a proble

Popular Abstract in Swedish I denna avhandling presenteras för första gången den svenske konstnären Jan Håfströms (född 1937) konstnärskap från debuten 1966 fram till 2002 på ett omfattande sätt. Koncept knutna till modernism och postmodernism används som en ram och den komparativa diskussionen placerar konstverken i en internationell kontext. Tidigare forskning och teorier kring materialikonografIn this thesis the oeuvre of the Swedish artist Jan Håfström (born 1937), from his debut in 1966 until 2002, is presented for the first time in a comprehensive approach. Concepts linked to modernism and postmodernism are used as a frame and the art works are discussed in a comparative way, placing the artist in an international context. Previous research and theories dealing with material iconogra

Most robots today can trace their origin to early industrial robot designs. Much of the technology that makes robots more human-friendly and adaptable for different applications has emerged from manufacturers of industrial robots. Industrial robots are by far the largest commercial application of robotics technology today. All the important foundations for robot control were initially developed wi

The present paper reports on a games workshop within the ABBI EU project involving children with visual impairments as co-creators. The created games show that it is possible to create fun, rich and social co-located games with wearable technology employing very simple interactivity. Having a device that makes a sound when you move allows for the creation of finding and avoiding games but also for

A comprehensive experimental study of the dynamics and rheology of concentrated aqueous dispersions of polyethylene glycol-grafted colloidal spheres is reported. The study focuses on good solvent conditions, for which excluded-volume interactions dominate. At high concentrations a glass transition is evident from the nondecaying component of the intensity correlation function measured with three-d

Cadastral Systems have developed during the latest decades, impelled by improved information technology. Cadastral projects have become more strategic in a development perspective, with expected long-term returns in economic growth. An improvement of an existent information system requires an understanding of the basis of the current model, its coverage and the processes of change. The land unit

Argument, topoi, confirmation, refutation