Search for dissertations about: "Per Jacobsson"

Showing result 1 - 5 of 13 swedish dissertations containing the words Per Jacobsson.

2. 1. Shape and material optimization for antenna applications

   Author : Per Jacobsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; explicit-implicit time stepping; sensitivity analysis; Nitsche s method; total scattering cross section; shape and material optimization; array antennas; finite element method;

   Abstract : In this thesis, a gradient-based method for shape and material optimization fortwo antenna applications is presented: minimization of the active reflectioncoefficient for conformal array antennas; and minimization of the totalscattering cross section for cylindrical scatterers. The sensitivity of theobjective function with respect to changes of the shape and material of the geometry isexpressed in terms of the original field problem and an adjoint field problem. READ MORE

4. 2. Shape Optimization for Electromagnetic and Quasimagnetostatic Applications

   Author : Per Jacobsson; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; shape optimization; continuum sensitivity; electromagnetic scattering; adjoint problem;

   Abstract : This thesis uses a continuum formulation of sensitivity for shape optimization in two-dimensional microwave scattering and quasimagnetostatic problems. The continuum sensitivity is obtained by solving an appropriate adjoint problem. READ MORE

5. 3. Skeletal muscle metabolism in patients with severe chronic obstructive pulmonary disease : A study of carbohydrate and fat metabolism

   Author : Per Jacobsson; Linköpings universitet; []
   Keywords : MEDICINE; MEDICIN;

   Abstract : In chronic obstructive pulmonary disease (COPD) deterioration of skeletal muscle metabolism is reported in both respiratory and non-respiratory muscles. This deterioration may contribute to both the development of respiratory failure and general disability often seen in severe COPD patients. READ MORE

6. 4. Towards systematic prevention of athletics injuries : Use of clinical epidemiology for evidence-based injury prevention

   Author : Jenny Jacobsson; Toomas Timpka; Per Renström; Sverker Nilsson; Willem van Mechelen; Linköpings universitet; []
   Keywords : ;

   Abstract : The aims of this thesis were to outline the design protocol for a prospective clinical epidemiological study of injuries among athletics athletes; study the 1-year prevalence, the point prevalence and incidence of injuries in total cohorts of Swedish elite adult and talented youth athletics athletes; pinpoint the risk indicators and factors for different injury types/patterns in athletics.In paper I, an argument-based method to investigate complex design problems was used to structure the collection and analysis of data. READ MORE

7. 5. Characterisation of Neisseria meningitidis from a virulence and immunogenic perspective that includes variations in novel vaccine antigens

   Author : Susanne Jacobsson; Hans Fredlund; Per Olcén; Paula Mölling; Elisabeth Wedege; Örebro universitet; []
   Keywords : Neisseria meningitidis; meningococcal disease; risk factors; vaccine; genome-derived neisserial antigens GNA ; polymerase chain reaction PCR ; sequencing; MEDICINE; MEDICIN; Medicin; Medicine; Biomedicin; Biomedicine;

   Abstract : Neisseria meningitidis, also referred to as meningococcus, is a Gram-negative diplococcal bacterium best known as an important cause of meningitis and septicaemia worldwide. Meningococcal disease is a rare but life-threatening illness that may progress to death despite optimal medical care including appropriate antibiotic therapy. READ MORE