Haku
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Heat management in high-efficiency photovoltaics
(2018)
Diplomityö
Diplomityö
Multi-junction solar cells are one of the most promising technologies for solar energy production in both terrestrial and space applications. Highest conversion efficiencies among all solar cells have been recorded by III–V ...
Enhancing nonlinear optical response of resonant gold nanostructures via lattice interactions
(2018)
Diplomityö
Diplomityö
Metal nanostructures are of interest because of their potential applications in optical metamaterials, which are artificial materials that can have physical properties not found in nature. Such nanostructures are also ...
Mixed Lattice Groups
(2018)
Diplomityö
Diplomityö
A mixed lattice group is a generalization of a lattice ordered group. The theory of mixed lattice semigroups dates back to the 1970s, but the corresponding theory for groups has been relatively unexplored. In this thesis ...
Quantitative Comparison of Glass and Plastic Optical Components in Mass-Produced Imaging Applications
(2018)
Diplomityö
Diplomityö
Plastics have, in imaging applications, mostly replaced glass as the most common optical material. However, as there is a constant demand for better and better cameras, manufacturers are starting to hit limits of optical ...
Technical performance assessment and quality control of ultrasound device monitors
(2018)
Diplomityö
Diplomityö
The purpose of this study was to investigate and evaluate the current technical performance of ultrasound imaging device displays in the Hospital District of South Ostrobothnia and in Pirkanmaa Hospital District. Ultrasound ...
Realistic asteroid interior models and full-wave tomography simulation
(2018)
Diplomityö
Diplomityö
The aim of this thesis is to develop a realistic deep interior model for a rubble-pile asteroid and conduct full-wave computed radar tomography on the developed model. The surface model of the asteroid Itokawa is used to ...
Nitrosamine Free Rubber Compounds – Replacing a Hazardous Thiuram Accelerator with Safe Alternatives
(2018)
Diplomityö
Diplomityö
Vulcanization is the process of cross-linking rubber to form a three-dimensional network giving rubber its characteristic properties. The most common form of vulcanization is sulfur vulcanization, where sulfur atoms form ...
Advanced ion beam sputtering coatings for high-power semiconductor diode lasers
(2018)
Diplomityö
Diplomityö
High-power semiconductor diode lasers are widely used in industrial applications such as material processing and as pump lasers. One challenge in the development of these lasers is that the laser diode suffers sudden ...
Process Control Using Paraconsistent Logic Programming
(2018)
Diplomityö
Diplomityö
In this Master’s thesis the author’s aim is to give model building tools for the temporal paraconsistent logic program called Before-After Extended Vector Annotated Logic Program with Strong Negation (bf-EVALPSN), originally ...
Decision tree learning with hierarchical features
(2018)
Diplomityö
Diplomityö
The performance of machine learning methods depends on the data they are given. Real life data sets can be incomplete and consist of various types of data. However, many methods are capable of handling only nominal and ...