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Visar resultat 1 - 5 av 17 avhandlingar som matchar ovanstående sökkriterier.
1. Track circuits’ robustness : Modeling, measurement and simulation
Sammanfattning : In countries with rough weather conditions, frequent delays cause railway companies to waste time and money. Many of these delays are related to the train detection systems, as the old DC track circuits are still used in some countries, including Sweden, our case study. LÄS MER
2. High Aspect Ratio Microstructures in Flexible Printed Circuit Boards : Process and Applications
Sammanfattning : Flexible printed circuit boards (flex PCBs) are used in a wide range of electronic devices today due to their light weight, bendability, extensive wiring possibilities, and low-cost manufacturing techniques. The general trend in the flex PCB industry is further miniaturization alongside increasing functionality per device and reduced costs. LÄS MER
3. Harmonic Mitigation in Traction Drives
Sammanfattning : In railway traffic the low friction between wheel and rail causes long braking distances, normally much longer than the sight distance of the driver, i.e. if the driver starts the braking when a problem on the track is discovered, it might be too late to brake the train. Therefore, safe railway traffic can not only rely on the driver. LÄS MER
4. Heterogeneous Technologies for Microfluidic Systems
Sammanfattning : In this thesis, conventional and unconventional technologies have been studied and combined in order to make heterogeneous microfluidics with potential advantages, especially in biological applications. Many conventional materials, like silicon, glass, thermoplastic polymers, polyimide and polydimethylsiloxane (PDMS) have been combined in building heterogeneous microfluidic devices or demonstrators. LÄS MER
5. Sequential 3D Integration - Design Methodologies and Circuit Techniques
Sammanfattning : Sequential 3D (S3D) integration has been identified as a potential candidate for area efficient ICs. It entails the sequential processing of tiers of devices, one on top the other. LÄS MER