Sökning: "wave-guides"
Hittade 5 avhandlingar innehållade ordet wave-guides.
1. New Methods for Reducing Ground-Borne Noise in Buildings above Railway Tunnels
Sammanfattning : The rapid expansion of major cities in the west Europeancountries has accentuated the need to exploit every potentialsite for new establishments, e.g. areas over train tunnels andnear railway tracks in general. LÄS MER
2. Adiabatic guiding of matter waves
Sammanfattning : Recent efforts in the field of ultracold atoms have goneinto creating wave guides of sub-micron sizes. In this thesis,the quantum dynamics of matter waves in such confiningpotential structures with minima extended in space isinvestigated. LÄS MER
3. Modelling tools for quieter vehicles : Waves in poro– and visco–elastic continua
Sammanfattning : New modelling tools intended to contribute to the development of components for quieter vehicles are developed. The tools are based on continuum models for wave propagation in poro– and visco–elastic media. By using geometric attributes of the studied components, the computational cost may be radically decreased compared to traditional methods. LÄS MER
4. Assessing precision and accuracy in acoustic scattering matrix measurements
Sammanfattning : Acoustic scattering matrices are used to characterize the influence of inline duct elements on the acoustic wave propagation in wave guides.When measuring the properties of these matrices, errors are always present in the results and need to be characterized to make valid statements on the correspondence between model predictions and measurements. LÄS MER
5. Optical interconnects and high frequency electronic packaging : SBU-materials, material characterization, LAP- & microprocessing
Sammanfattning : The main objective of this thesis is to discuss and demonstrate optical interconnect technologies. These can be used to enhance the data throughput capacity of future printed circuit boards and backplanes, i.e. exchange Copper conductors with light conductors. LÄS MER