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This work presents a digital calibration technique in continuous-time (CT) ΔΣ analog to digital (A/D) converters. The converter is clocked at 144MHz with a low oversampling ratio (OSR) of only 8. Dynamic element matching (DEM) is not efficient to linearize the digital to analog converter (DAC) when the OSR is very low. Therefore, non-idealities in the outermost multi-bit feedback DAC are measured
Low frequency vibrations in footbridges is a cause of annoyance for pedestrians crossing the bridge. Bagers bro, a footbridge built in Malmö (Sweden) had several constraints in the physical design that caused the first eigenmode of the bridge to be at 1.8Hz which is a severe problem for pedestrians. Therefore the bridge was fitted with tuned mass dampers to mitigate the vibration problem. To evalu
Reduction in traffic-induced ground vibrations by the use of barriers is investigated. The traffic load characteristics were measured for motorway traffic. The effects of parameters on various types of barriers were examined by the use of a finite element model that was calibrated to green-field measurements. The model involved a layered soil and bedrock. The depth of a trench and the elastic modu
This thesis presents experimental investigation and modelling of the mechanical response of glassy polycarbonate (PC) during deformation. The mechanical response is studied experimentally over a wide range of length-scales using X-ray scattering techniques and optical full-field deformation measurement by Digital Image Correlation (DIC). Results from the experimental work have been used to develop
The paper presents alternative analytical approaches to evaluation of structural changes in selected transition economies (Czech Republic, Poland, Hungary, Slovakia, Slovenia). The analysis starts from the comparison of intensity of structural changes, as an introductory (quantitative) concept measuring structural adjustment capacity. Besides the intensity of structural changes, the need for devel
Abstract in UndeterminedMaking Blockbusters in Sweden: The Scandinavian vs. the Hollywood ApproachThe first film installment of Stieg Larsson’s Millennium trilogy, Män som hatar kvinnor (The Girl with the Dragon Tattoo, 2009) is most probably the single most successful Scandinavian feature ever in attracting audiences to the global box office. Paradoxically, however, it can be argued that the film
Popular Abstract in Swedish Bilsäten har genomgått en kontinuerlig utveckling ända sedan de först beskrevs år 1885. På den tiden kunde man läsa om vadderade läderbänkar, monterade på stora fjädrar, fastsatta i chassit på ”hästlösa vagnar”. När polyuretanskum först började tillverkas på 1950-talet introducerades de snabbt i bilsätena och dessa genomgick stora förbättringar. Skummen utgör idag en st
We consider a system where a number of independent, time-triggered or event-triggered control loops are closed over a shared communication network. Each plant is described by a first-order linear stochastic system. In the event-triggered case, a sensor at each plant frequently samples the output but attempts to communicate only when the magnitude of the output is above a threshold. Once access to
