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Frequency-Domain Iterative Learning Control of a Marine Vibrator

To the purpose of marine seismic acquisition, new acoustic sources have been developed to reduce the environmental impact. The use of marine vibrators makes it possible to define emission frequency ranges, consequently allowing limitation of the frequencies that disturb marine animal life. Constructing marine vibrators with high efficiency and linear dynamics is however difficult, and the vibrator

Formaldehyde and Hydroxyl Radicals in an HCCI Engine - Calculations and LIF-Measurements

Concentrations of hydroxyl radicals and formaldehyde were calculated using homogeneous (HRM) and stochastic reactor models (SRM), and the result was compared to LIF measurements from an optically accessed iso-octane/n-heptane-fuelled homogeneous charge compression ignition (HCCI) engine. The comparison was at first conducted from averaged total concentrations/signal strengths over the entire combu

Pedagogikens mysterier

Survey over the theme of pedagogy in the works of Pier Paolo Pasolini, Andrea Zanzotto and Alberto Moravia

Aspects on Chronic Venous Disease of the Lower Limb

Popular Abstract in Swedish Denna avhandling studerar kronisk venös sjukdom i nedre extremiteten, något som drabbar mellan 30 – 50% av den vuxna populationen i västvärlden. En viktig faktor i utredningen av kronisk venös sjukdom är s.k. reflux, vilket innebär att venklaffar inte förmår hindra blodet att rinna i ”fel” riktning. Därmed minskar möjligheten till ventryckssänkning i samband med arbete,Controversies exist regarding both what is required for a proper diagnosis of chronic venous disease (CVD), and what treatment to offer patients. An objective evaluation is mandatory to individualize treatment. This thesis deals with the evaluation of patients with CVD with specific emphasis on CEAP classification (C; clinical, E; etiological, A; anatomical, P; pathophysiological), symptoms and si

Rate-Compatible Spatially-Coupled LDPC Code Ensembles With Nearly-Regular Degree Distributions

Spatially-coupled regular LDPC code ensembles have outstanding performance with belief propagation decoding and can perform arbitrarily close to the Shannon limit without requiring irregular graph structures. In this paper, we are concerned with the performance and complexity of spatially-coupled ensembles with a rate-compatibility constraint. Spatially-coupled regular ensembles that support rate-