Search for dissertations about: "disc position"

Showing result 1 - 5 of 25 swedish dissertations containing the words disc position.

2. 1. A Study on Spray-Guided Stratified Charge Systems for Gasoline DI Engines

   Author : Mikael Skogsberg; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; multi-hole; DISC; direct injection; MIE; spray-guided; air-assisted; GDI; PDA; SI Engines; swirl; LIF; piezo injector;

   Abstract : Innovative technologies are required to meet ongoing challenges to reduce the CO2 emissions from passenger cars and their fuel consumption. Such technologies are usually complex and require detailed analyses to deliver efficient, reliable systems. READ MORE

4. 2. Development of new MRl-based analysis methods for improved diagnosis of low back pain patients

   Author : Christian Waldenberg; Göteborgs universitet; []
   Keywords : MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; annular fissure; bone marrow lesion; image analysis; intervertebral disc; intervertebral disc degeneration; low back pain; machine learning; radiomics; texture analysis;

   Abstract : BACKGROUND Low back pain (LBP) is the leading cause of disability worldwide, where three of four individuals experience back pain at some point in their lives. The pathophysiological background of LBP is probably multifactorial, where bone marrow damage, tissue changes in the vertebral endplates, and intervertebral disc (IVD) degeneration have been recognized as tissue changes linked to pain. READ MORE

5. 3. Wind power wake modelling : Development and application of an actuator disc method for industrial utilization

   Author : Nikolaos Simisiroglou; Stefan Ivanell; Thorsten Lutz; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Wind power; Offshore wind farm; Wakes; Actuator Disc Method ACD ; Computational Fluid Dynamics CFD ; Reynolds Average Navier–Stokes RANS ; WindSim; PHOENICS;

   Abstract : As a wind turbine extracts energy from the wind it creates a region downstream where the wind velocity is decreased and the urbulence intensity is increased, this region is commonly called the wake region. Today’s wind farms include a large number of wind turbines position in tight layouts. READ MORE

6. 4. Lumbar disc herniation. Clinical outcome and segmental stability using a new radiological classification and radiostereometry

   Author : Klas Halldin; Göteborgs universitet; []
   Keywords : lumbar disc herniation; discectomy; radiostereometry; segmental stability; instability; surgical outcome; radiological classification;

   Abstract : Satisfactory results following conventional lumbar discectomy have been reported in 70-90% of cases. Remaining or recurrent low back pain or sciatica is, however, seen in many patients for reasons not yet fully understood. A relationship has previously been shown between the morphologic characteristics, i.e. READ MORE

7. 5. On Contact Mechanisms and Mechanical Transmission Performance

   Author : Lars Maclennan; Maskinelement; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; vacuum technology; vibration and acoustic engineering; Maskinteknik; hydraulik; vakuumteknik; vibrationer; akustik; hydraulics; Mechanical engineering; artificial neural network; experimental study; disc brake; dynamic analysis; shaft; Spur gear;

   Abstract : This thesis consists of four papers, which treat the modelling of a spur gear set and a disc brake, and the interaction between the machine elements. Features of the performance are studied in relation to the initial stated assumptions. READ MORE