Search for dissertations about: "VELOCITY STRUCTURE"

Showing result 1 - 5 of 273 swedish dissertations containing the words VELOCITY STRUCTURE.

2. 1. Wood and fibre mechanics related to the thermomechanical pulping process

   Author : Jan-Erik Berg; Per Engstrand; Per A. Gradin; Tomas Björkqvist; Mittuniversitetet; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Acoustic emission; Chips; Compression tests; Defibration; Disc refiners; Energy consumption; Fibre structure; Force sensors; Fracture; Impact strength; Mathematical analysis; Moisture content; Picea abies; Refining; Stiffness degradation; Strains; Temperature; Thermomechanical pulping; Velocity; Chemical engineering; Kemiteknik;

   Abstract : The main objective of this thesis was to improve the understanding of some aspects on wood and fibre mechanics related to conditions in the thermomechanical pulping process. Another objective was to measure the power distribution between the rotating plates in a refiner. READ MORE

4. 2. Seismological Investigation of Katla Volcanic System (Iceland) : 3D Velocity Structure and Overall Seismicity Pattern

   Author : Zeinab Jeddi; Ari Tryggvason; Olafur Gudmundsson; Heidi Soosalu; Uppsala universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Volcano tomography; volcano seismicity; Katla volcano; Earthquake location; Geofysik med inriktning mot seismologi; Geophysics with specialization in Seismology;

   Abstract : The work in this thesis concentrates on Katla volcano in southern Iceland. This is one of Europe’s most active volcanoes and its history tells us that it poses many threats to society, both locally (Iceland) and on a broader scale (Europe). READ MORE

5. 3. Galactic Structure Revealed by Space Astrometry

   Author : Johan Holmberg; Astronomi - Genomgår omorganisation; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomi; cosmic chemistry; Galactic structure; Milky Way Galaxy; Galactic kinematics and dynamics; Galactic chemical evolution; moving groups; solar neighbourhood; dark matter; astrometry; Hipparcos; space research; Astronomy; rymdvetenskap; kosmisk kemi; Space technology; Rymdteknik; Fysicumarkivet A:2001:Holmberg;

   Abstract : This work demonstrates how the structure of our Galaxy, the Milky Way, can be unveiled with the use of space astrometry. It consists of two parts, of which the first is a brief introduction to the fields of Galactic structure, covering the Galaxy's stellar constituents, how the Galaxy was formed and how it has evolved over time, both chemically and kinematically. READ MORE

6. 4. Sunspot structure and dynamics

   Author : Luc Rouppe van der Voort; Wolfgang Schmidt; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Astronomy; Astronomi; Astronomy; astronomi;

   Abstract : Fundamental physical processes occur on small spatial scales in the solar atmosphere and high-spatial-resolution observations are necessary to test theoretical models. This thesis presents high-spatial-resolution observations of sunspots obtained with the Swedish solar telescopes on La Palma: the Swedish Vacuum Solar Telescope (SVST) and its successor the Swedish 1-m Solar Telescope (SST). READ MORE

7. 5. Near-ambient pressure velocity map imaging

   Author : Tzu-En Chien; Dan Harding; Klas Engvall; Rainer Beck; KTH; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Catalyst; Surface reaction; Near-ambient pressure; CO; CO2; CO oxidation; Pd; Palladium; Instrument design; Velocity-map imaging; Katalysator; Ytreaktion; Näraomgivningstryck; CO; CO2; CO oxidation; Pd; Palladium; Instrumentdesign; Hastighetskartbildning; Chemical Engineering; Kemiteknik;

   Abstract : Catalytic reactions on solid surfaces have been studied under Ultra-high vacuum (UHV) conditions for decades. These studies provide crucial information for catalytic reactions, such as surface structures, adsorption sites, and reaction mechanisms. READ MORE