Sökning: "Sami"

Visar resultat 26 - 30 av 121 avhandlingar innehållade ordet Sami.

1. 26. On the profitability of momentum strategies and optimal leverage rules

   Författare :Christian Lundström Tjurhufvud; Tomas Sjögren; Sami Vähämaa; Umeå universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Bootstrap; Exchange Traded Products; Kelly criterion; Money management; Opening Range Breakout Strategies; Optimal fraction criterion; Time series momentum; Economics; nationalekonomi;

   Sammanfattning : This thesis consists of an introductory part and five self-contained papers related to the profitability of momentum strategies and optimal leverage rules.Paper [I] tests the success rate of trades and the returns of the Opening Range Breakout (ORB) day trading strategy. LÄS MER

3. 27. Heterogeneous Technologies for Microfluidic Systems

   Författare :Gunjana Sharma; Klas Hjort; Sami Franssila; Uppsala universitet; []
   Nyckelord :actuator; biosensor; fluidic circuit board; heterogeneous technology; ion track; microfluidic; pump; stainless steel; super-hydrophobic; valve; Viton; TECHNOLOGY; TEKNIKVETENSKAP; Teknisk fysik med inriktning mot mikrosystemteknik; Engineering Science with specialization in Microsystems Technology;

   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

4. 28. Demagnetization and Fault Simulations of Permanent Magnet Generators

   Författare :Stefan Sjökvist; Sandra Eriksson; Sami Ruoho; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Demagnetization; Permanent magnet; Finite Element Method; Synchronous generators; Wind power; Teknisk fysik med inriktning mot elektronik; Engineering Science with specialization in Electronics;

   Sammanfattning : Permanent magnets are today widely used in electrical machines of all sorts. With their increase in popularity, the amount of research has increased as well. In the wind power project at Uppsala University permanent magnet synchronous generators have been studied for over a decade. LÄS MER

5. 29. On the System Optimization of Magnetic Circuit with Alternative Permanent Magnets and its Demagnetization

   Författare :Jonathan Sjölund; Sandra Eriksson; Leijon Mats; Sami Ruoho; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Permanent magnet machines; Finite element method; ferrite permanent magnets; linear machines; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

   Sammanfattning : Permanent magnet (PM) machines are often associated with the usage of rare earth magnets, due to their high energy density. One such rare earth magnet is the neodymium-iron-boron (NdFeB), which is mainly produced in China. Due to the global scarcity of the rare earth magnets, much interest is put into utilizing other permanent magnet materials. LÄS MER

7. 30. Microstructures for Chemical Analysis : Design, Fabrication and Characterisation

   Författare :Malin Svedberg; Fredrik Nikolajeff; Greger Thornell; Jan-Åke Schweitz; Sami Franssila; Uppsala universitet; []
   Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; electrospray ionisation mass spectrometry; polymer microfabrication; paraffin actuators; hot embossing; Materialvetenskap; Materials science; Teknisk materialvetenskap;

   Sammanfattning : The interest for miniaturisation in chemical and biological analysis has increased in recent years. In this work, the design, fabrication and characterisation of tools for microanalysis have been studied. The focus is set on polymer microchips for applications in chemical analysis. LÄS MER