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Showing result 1 - 5 of 583 swedish dissertations matching the above criteria.

2. 1. Computer Simulations of Simple Liquids with Tetrahedral Local Order : the Supercooled Liquid, Solids and Phase Transitions

   Author : Måns Elenius; Mikhail Dzugutov; Jonathan Doye; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Simple liquids; glasses; liquid-glass transition; supercooled liquids; tetrahedral liquids; phase transitions; quasicrystals; molecular dynamics; Condensed matter physics; Kondenserade materiens fysik; Liquid physics; Vätskefysik; numerisk analys; Numerical Analysis;

   Abstract : The understanding of complex condensed matter systems is an area of intense study. In this thesis, some properties of simple liquids with strong preference for tetrahedral local ordering are explored. These liquids are amenable to supercooling, and give complex crystalline structures on eventual crystallisation. READ MORE

4. 2. X-Ray Investigations of the Liquid-Liquid Critical Point Hypothesis in Supercooled Water

   Author : Alexander Späh; Anders Nilsson; Martin Meedom Nielsen; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; water; supercooled water; x-ray scattering; free electron x-ray laser; liquid-liquid phase transition; liquid-liquid critical point; x-ray speckle visibility spectroscopy; kemisk fysik; Chemical Physics;

   Abstract : This thesis presents experimental x-ray scattering studies on supercooled liquid water. A liquid-liquid transition between two structurally distinct configurations has been found in deeply supercooled water, indicating the existence of a liquid- liquid critical point. READ MORE

5. 3. Platforms in Liquid Modernity : Essays about the Sharing Economy, Digital Platforms, and Institutions

   Author : Andrea Geissinger; Christina Öberg; Christofer Laurell; Christian Sandström; Robin Teigland; Örebro universitet; []
   Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; sharing economy; digital platforms; institutional theory; institutional logics; social ordering; Social Media Analytics; community; liquid modernity; interregnum; in-betweenness;

   Abstract : The year 2020 feels like the beginning of a crescendo of change. As environmental and social challenges reach an all-time high, the organization of our societies is coming under scrutiny. We, as a society, turn to technology to reinvent the organization of social life after disruptive episodes. READ MORE

6. 4. Liquid Crystals in Guided Wave Optics

   Author : Giusy Scalia; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; antiferroelectric liquid crystals; fully-leaky guided mode; ortho-conics; waveguide; liquid crystals; anisotropy;

   Abstract : Liquid crystals are unique optical materials due to their large effective electrooptic and opto-optic coefficients. Currently, liquid crystals are primarily used in flat-panel dis-plays, but there is also an increasing number of nondisplay applications requiring new types of devices employing materials with unique optical properties. READ MORE

7. 5. Fluid Dynamics in Stirred Vessels - Experiments and simulations of single-phase and liquid-liquid systems

   Author : Fredrik Svensson; Chalmers tekniska högskola; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Particle Image Velocimetry PIV ; single-phase; Laser Doppler Anemometry LDA ; mixing; liquid-Liquid; immiscible; stirred tank; Rushton turbine; Computational Fluid Dynamics CFD ; macro-instability; frequency analysis; refraction index matched;

   Abstract : This thesis applies experimental measurement techniques and computational fluid dynamics to evaluate turbulent mixing of liquid-liquid systems in stirred vessels. Also studies of macro-instabilities in a single-phase system and how they affect flow and thus mixing are conducted. READ MORE