Search for dissertations about: "Intermediate"

Showing result 21 - 25 of 1517 swedish dissertations containing the word Intermediate.

  2. 21. Properties of Type Ia Supernovae : From the (intermediate) Palomar Transient Factory

    Author : Seméli Papadogiannakis; Ariel Goobar; Rahman Amandius; Ulrich Feindt; Edward Baron; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Type Ia supernovae; cosmology; machine learning; fysik; Physics;

    Abstract : Type Ia Supernovae (SNe) have been used to discover the accelerated expansion of the universe but many open questions remain unanswered. These include the stellar progenitor, extinction and possible systematic trends in the supernova brightness for different host galaxy environments or cosmic time. READ MORE

  4. 22. Intermediate State Stabilisation in Enzyme Catalysis Structural studies of two serine proteases and a photosynthetic reaction centre

    Author : Gergely Katona; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; photosynthetic reaction centre; X-ray crystallography; structural mechanism; enzyme kinetics; serine protease; enzyme intermediate; enzyme catalysis;

    Abstract : Enzymes play a key role in every organisms life. They catalyse chemical reactions and may also respond to external stimulus. The reoccurring theme of this thesis is how biologically relevant information can be gleaned from X-ray structures of the enzymes. READ MORE

  5. 23. Removal of ultrafine particles by intermediate air filters in ventilation systems. Evaluation of performance and analysis of applications

    Author : Bingbing Shi; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; measurements; ultrafine particles; lifetime cost; indoor air quality; health effect; air cleaning; particle source; modelling; intermediate filter; filter standard;

    Abstract : Epidemiological and toxicological studies demonstrate that ultrafine particles (UFPs) are strongly related with respiratory and cardiovascular diseases and syndromes. One common method to reduce human exposure to particulate air pollution is the use of intermediate class filters (F5-F9 class filters according to EN779:2002). READ MORE

  6. 24. Experimental investigation of the flow field in an aggressive intermediate turbine duct

    Author : Lars-Uno Axelsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; phase-resolved measurements; Intermediate turbine duct; flow visualization; vorticity dynamics; turbulence.; inter-turbine duct; hot-wire anemometry; experiment; 5-hole pressure probe;

    Abstract : Intermediate turbine ducts are used for connecting thehigh-pressure turbine to the low-pressure turbine in turbofan engines. In order to meet the demands for more efficient and environmentally friendly jet engines, future intermediate turbine ducts need to have larger radial off-sets without increasing their length. READ MORE

  7. 25. Experimental Investigation of the Aerodynamics and Heat Transfer in an Intermediate Turbine Duct

    Author : Martin Johansson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Intermediate Turbine Duct; Gas Turbine; Heat Transfer; Aerodynamics; Experimental Fluid Dynamics;

    Abstract : In today’s aero engines with large bypass ratios, the difference in diameter between the high pressure turbine and the downstream turbine, being either an intermediate or low pressure turbine, is large. There is also scope to further increase it, in order to increase the efficiency of the downstream turbine and enabling use of larger diameter fans. READ MORE