Search for dissertations about: "Per Mattsson"

Showing result 1 - 5 of 25 swedish dissertations containing the words Per Mattsson.

2. 1. Osteoarthritis of the Hip and Uncemented Total Hip Arthroplasty : Effects of Immediate Weight Bearing on Implant Stability, Bone Mineral Density, and Body Composition

   Author : Olof Wolf; Hans Mallmin; Sune Larsson; Jan Milbrink; Per Mattsson; Per Adolphson; Uppsala universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Osteoarthritis of the hip; uncemented; total hip arthroplasty; stability; RSA; BMD; DXA; body composition; weight bearing; Orthopaedics; Ortopedi; Orthopaedics; Ortopedi;

   Abstract : The initial recommendation for the postoperative regime after uncemented total hip arthroplasty (THA) was 6-12 weeks of partial weight bearing (PWB) to obtain a stable implant position during bone ingrowth. In recent years patients with uncemented THA have increasingly practiced full weight bearing (FWB) after surgery, which has largely been based on clinical experience rather than on scientific evidence. READ MORE

4. 2. Intracranial facial nerve lesion : experimental study on neural degeneration and its treatment

   Author : Per Mattsson; Karolinska Institutet; Karolinska Institutet; []
   Keywords : ;

   Abstract : The aim of this thesis was to develop an experimental model that would generate extensive motor neuronal degeneration in adult rats, and furthermore to study mechanisms causing nerve cell death and effects of putative neuroprotective compounds. The facial nerve was chosen because it is well characterized and allows evaluation of functional recovery by analyzing vibrissae movements. READ MORE

5. 3. Pulse-modulated feedback in mathematical modeling and estimation of endocrine systems

   Author : Per Mattsson; Alexander Medvedev; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Elektroteknik med inriktning mot reglerteknik; Electrical Engineering with specialization in Automatic Control;

   Abstract : The research field of systems biology has gained a lot of interest during the last decades. Systems biology can be seen as the systematic study of complex interactions in biological systems, mainly by methods from dynamical systems theory. READ MORE

6. 4. Continuously Variable Split-Power Transmissions with Several Modes

   Author : Per Mattsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; continuously variable transmission; variator; speed ratio range; ratio coverage; traction drive; mode shift; CVT; planetary gear; power split; IVT; infinitely variable transmission; epicyclic gear train; hydrostatic variator;

   Abstract : A continuously variable transmission (CVT) of split-power design consists of a variator and an arrangement of planetary gears. A black box model describing such transmissions is presented. The model can be used for synthesis as well as loss-free analysis of split-power CVT concepts in general. READ MORE

7. 5. Modeling and identification of nonlinear and impulsive systems

   Author : Per Mattsson; Alexander Medvedev; Roy Smith; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; nonlinear system identification; modeling; impulsive systems; impulse detection;

   Abstract : Mathematical modeling of dynamical systems plays a central roll in science and engineering. This thesis is concerned with the process of finding a mathematical model, and it is divided into two parts - one that concentrates on nonlinear system identification and another one where an impulsive model of testosterone regulation is constructed and analyzed. READ MORE