Sökning: "Per-olof Larsson"
Visar resultat 6 - 9 av 9 avhandlingar innehållade orden Per-olof Larsson.
6. Optical spectroscopy of InGaAs quantum dots
Sammanfattning : The work presented in this thesis deals with optical studies of semiconductor quantum dots (QDs) in the InGaAs material system. It is shown that for self-assembled InAs QDs, the interaction with the surrounding GaAs barrier and the InAs wetting layer (WL) in particular, has a very large impact on their optical properties. LÄS MER
7. Optimization of track geometry maintenance : a study of track geometry degradation to specify optimal inspection intervals
Sammanfattning : Railway infrastructure is a complex system which comprises different subsystems. Long useful life span is one of the important aspects of this prime mode of transport. The useful life length of its assets is highly dependent on the maintenance and renewal strategy used during its life cycle. LÄS MER
8. The need of condition monitoring to support simulations when predicting system availability of Functional Products
Sammanfattning : Today, competition among product manufacturers has increased and many facebeing copied and thus losing their uniqueness. To differentiate on the market,new businesses, which extend the manufacturer’s responsibility throughsupporting and guaranteeing product performance, thus offering more value-creating activities, have received increasing interest. LÄS MER
9. A Challenge-driven Framework for Innovations in Railways
Sammanfattning : The railway is often perceived as an industry where new technology is not utilised to its full potential. However, the future of the railway and its ability to respond to future transportation demands lies in its ability to adopt, adapt, implement, and integrate emerging technology. These technologies are expected to lead to, e.g. LÄS MER