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Visar resultat 1 - 5 av 6 avhandlingar som matchar ovanstående sökkriterier.
1. Photoplethysmography : methodological studies and applications
Sammanfattning : Photoplethysmography (PPG), an optical non-invasive technique for measuring skin perfusion changes, was investigated and evaluated. The method was compared with laser Doppler flowmetry (LDF) when measuring perfusion changes in human fingers and forearms. LÄS MER
2. Aspects of Static Multi-Class Traffic equilibria under Congestion Pricing
Sammanfattning : Congestion charging is a now accepted means of influencing traffic to behave in a more socio-economic optimal way, like e.g. in the Stockholm project. Already early work, in the 1920’s, showed that road use can be inefficient due externalities, i. LÄS MER
3. Contributions to Probabilistic Discrete Choice
Sammanfattning : .... LÄS MER
4. Preventing pressure ulcers by assessment of the microcirculation in tissue exposed to pressure
Sammanfattning : The overall aim of this thesis was to combine optical methods into a system with the ability to simultaneously measure blood flow changes at different tissue depths. The goal of such a system was to reveal vascular mechanisms relevant to pressure ulcer etiology under clinically relevant conditions and in relation to the evaluation of pressure-redistribution support surfaces. LÄS MER
5. Monitor the heart simply and smooth : with less artefacts using bluetooth
Sammanfattning : .... LÄS MER