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Showing result 1 - 5 of 188 swedish dissertations matching the above criteria.

2. 1. Contributions to motion planning and orbital stabilization : case studies: Furuta pendulum swing up, inertia wheel oscillations and biped robot walking

   Author : Pedro Xavier Miranda La Hera; Anton Shiriaev; Umeå universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Under-actuated Systems; Orbital Exponential Stability; Motion Planning; Virtual Constraints; Walking robots; Automatic control; Reglerteknik;

   Abstract : Generating and stabilizing periodic motions in nonlinear systems is a challenging task. In the control system community this topic is also known as limit cycle control. In recent years a framework known as Virtual Holonomic Constraints (VHC) has been developed as one of the solutions to this problem. READ MORE

4. 2. All-Fiber System for Photonic States Carrying Orbital Angular Momentum : A Platform for Classical and Quantum Information Processing

   Author : Alvaro Alarcón; Guilherme B. Xavier; Sebastião de Pádua; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Quantum Communication; Optical communication; Orbital Angular Momentum; Photonic Lantern; Few-mode-fibers;

   Abstract : The protection of confidential data is a fundamental need in the society in which we live. This task becomes more relevant when observing that every day, data traffic increases exponentially, as well as the number of attacks on the telecommunication infra-structure. READ MORE

5. 3. Orbital floor fractures - aspects of diagnostic methods, treatment and sequelae

   Author : Lena Folkestad; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; orbital floor fracture: sequelae; patients experience; diplopia; entrapment; vertical eye motility; vertical electro-oculography vEOG ;

   Abstract : Despite surgical intervention, orbital floor fractures are associated with risks of persisting sensibility disturbances, enophthalmos and diplopia. Cheek asymmetry and trismus may result when the zygoma is dislocated. In evaluating the surgical results patients’ experiences of the outcomes have to be investigated. READ MORE

6. 4. Development and application of Muffin-Tin Orbital based Green’s function techniques to systems with magnetic and chemical disorder

   Author : Andreas Kissavos; Igor Abrikosov; Hubert Ebert; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Mathematical physics; Theoretical Physics; Muffin-Tin Orbital method; Calculations; Magnetism; Lloyd’s formula; Mathematical physics; Matematisk fysik;

   Abstract : Accurate electronic structure calculations are becoming more and more important because of the increasing need for information about systems which are hard to perform experiments on. Databases compiled from theoretical results are also being used more than ever for applications, and the reliability of the theoretical methods are of utmost importance. READ MORE

7. 5. First-principles theory of electrically-induced spin and orbital magnetization

   Author : Leandro Salemi; Peter M. Oppeneer; Yuriy Mokrousov; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Spin-orbit torque; spin Hall effect; Rashba-Edelstein effect; spin Nernst effect; relativistic DFT; spin-orbitronics;

   Abstract : Spin-orbit torques (SOTs) have emerged recently as practical tools to control the magnetization in spintronic devices, but it is debated what the underlying fundamental processes are that enable fast and energy-efficient magnetization switching.In this thesis, we investigate theoretically possible means of controlling magnetization in magnetic materials and heterostructures. READ MORE