Search for dissertations about: "rubbing"

Showing result 1 - 5 of 13 swedish dissertations containing the word rubbing.

2. 1. Structures and Properties of Ferroelectric Liquid Crystal Displays

   Author : Marek Matuszczyk; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; smectic; displays; dielectric anisotropy and biaxiality; surface-stabilized structure; dielectric; paraelectric; liquid crystal alignment; electroclinic effect; grey scale; polarization; multiplexing; liquid crystal LC ; orthogonal and tilted phases; chirality; aligning layer; ferroelectric; polyimide; rubbing; light valves and modulators; SSFLC;

   Abstract : Liquid crystals have unique physical properties as they combine the features of solids and liquids. In thermotropic liquid crystals the degree of order varies with temperature resulting in an appearance of intermediate phases. READ MORE

4. 2. Dynamics of Rotors Influenced by Rubbing Contacts

   Author : John L. Isaksson; Göran Gerbert; Linköpings universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

   Abstract : This thesis concerns theoretical studies of the dynamical behaviour of a rotor interacting with its non-rotating surroundings. Rotor-stator rubs make the rotor system strongly non-linear, which leads to phenomena that are not seen for ordinary rotors. READ MORE

5. 3. Cryptic Female Choice and Male Mating Behaviour : Sexual Interactions in Beetles

   Author : Martin Edvardsson; Göran Arnqvist; Paul Ward; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Biology; Cryptic female choice; Copulatory courtship; Harmful male traits; Nuptial gifts; Sperm competition; Sexual selection; Tribolium castaneum; Callosobruchus maculatus; Biologi; Biology; Biologi;

   Abstract : The importance of cryptic female choice, i.e. female post-copulatory influence over male reproductive success, in driving the evolution of male traits remains controversial. The main aim of this thesis was to understand the post-copulatory consequences of sexual interactions and the importance of cryptic female choice in two species of beetle. READ MORE

6. 4. Tribological nature of squealing disc brakes

   Author : Filip Bergman; Uppsala universitet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Materialvetenskap; Materials science; Teknisk materialvetenskap; materialvetenskap; Materials Science;

   Abstract : In the stiff competition between car manufacturers, silent and vibration free brakes hasbecome increasingly important. The aim of the present work is to increase the knowledge of the fundamental friction mechanisms operating in brake systems and to study the parameters influencing disc brake squeal generation. READ MORE

7. 5. On applied CFD and model development in combustion systems development for DI diesel engines

   Author : Lars Dahlén; KTH; []
   Keywords : ;

   Abstract : Soot mediated oil thickening, normally referred to asoilsoot, is a well known problem that can cause increased wearon lubricated moving or rubbing components in diesel engines.The ambition of this thesis is to understand the mechanisms ofcombustion and soot formation that pave the way for thisproblem and use this knowledge in the development of apredictive model for soot contamination of the oil. READ MORE