Sökning: "multilayered structures"
Visar resultat 1 - 5 av 24 avhandlingar innehållade orden multilayered structures.
1. Statistical energy analysis and variational principles for the prediction of sound transmission in multilayered structures
Sammanfattning : Multilayered structures have many application in industry and society: they have peculiar properties and serve a variety of purposes, like structural support, thermal insulation, vibrational and acoustic isolation. This thesis concerns the prediction of sound transmission in multilayered structures. LÄS MER
2. Multilayered Coreless Printed Circuit Board (PCB) Step-down Transformers for High Frequency Switch Mode Power Supplies (SMPS)
Sammanfattning : The Power Supply Unit (PSU) plays a vital role in almost all electronic equipment. The continuous efforts applied to the improvement of semiconductor devices such as MOSFETS, diodes, controllers and MOSFET drivers have led to the increased switching speeds of power supplies. LÄS MER
3. Fabrication, Characterization and Applications of Porous Silicon Thin Films and Multilayered Systems
Sammanfattning : Variable angle spectroscopic ellipsometry was used for characterization of single- as well as multilayered systems of porous silicon. In addition to the complex structures such as Bragg reflectors and Fabry-Pérot filters, more advanced continuos porosity profiles were manufactured in a controlled manner. LÄS MER
4. Structure evolution of phase-separated EC/HPC films for controlled drug release
Sammanfattning : Porous phase-separated ethylcellulose/hydroxypropylcellulose (EC/HPC) films are used to control drug transport out of pharmaceutical pellets. The drug transport rate is determined by the structure of the porous films that are formed as the water-soluble HPC leaches out. LÄS MER
5. Characterization of injection molded polymers – from conventional to wood-based thermoplastics
Sammanfattning : The success of polymers products is associated with the melt processability, which allows to create products with complex shapes at a low cost. One of the most widely used processing techniques utilizing melt processability is injection molding, where a polymer is heated until it flows into a mold under pressure. LÄS MER