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Telemonopolens strategier : en studie av telekommunikationsmonopolens strategiska beteende vid liberalisering av teleoperatörsbranschen

In this thesis the strategic behaviour of the three operators (Televerket/Telia, PTT Telecom and BT) on strong technological development and deregulation of the business during a period of fifteen years have been described, interpreted and analysed. Some thirty more operators have also been investigated in this respect - however not in depth. The strategic behaviour of the operators have been comp

Reliability test-retest of the Nordic Assisted Mobility Evaluation (NAME 1.0)

This paper describes preliminary results from the test-retest of the NAME 1.0. Four scales were tested: Mobility-related participation frequency; Mobility ease/difficulty; Mobility dependence; Extent of assistance in mobility. The test was conducted in the five Nordic countries. In all 147 mobility device users took part in the study, mean age 60 years (range 19 - 93). Each participant was intervi

On the Construction and Analysis of Iteratively Decodable Codes

Iterative decoding methods allow efficient decoding of long codes that are composed of smaller component codes. As a result reliable communication can be achieved with low decoding complexity even for rates close to Shannon capacity. This makes iteratively decodable codes a very attractive object of study in modern coding theory. This thesis focuses on different kinds of cycles which appear in th

Pheromones and kairomones for detection and control of indoor pyralid moths

Three pyralid moths, the Mediterranean flour moth (Ephestia kuehniella), the almond moth (Ephestia cautella) and the Indian meal moth (Plodia interpunctella), infest food products all over the world and cause severe problems in factories, shops and households. For health and environmental reasons chemical control becomes more and more restricted. We here present some promising results offering eff

Informationskompetens – generella färdigheter för fördjupat lärande

Förmågan att effektivt utnyttja och kritiskt förhålla sig till olika informationsresurser – ”information literacy” eller informationskompetens – är en central färdighet i det moderna samhället. Det utgör också en allt viktigare del av lärandet i högre utbildning. Syftet med detta paper är tvåfaldigt: 1) att problematisera relationen mellan informationskompetens som en generell färdighet och mer sp

A comparison and an improvement of two continuous-time models for current-mode control

Current-mode control can be used to control switched DC-DC power converters. This paper compares two continuous-time models for current-mode control that are made to be accurate up to half the switching frequency. The two models are the ones presented by Ridley and Tan. The closed loop frequency responses predicted by these two models are compared with results obtained from simulations of a buck c