Search for dissertations about: "light emission"

Showing result 16 - 20 of 371 swedish dissertations containing the words light emission.

  2. 16. Light propagation in an anisotropically scattering medium

    Author : Elena Vasileva; Sergei Popov; Miguel A. Alonso; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; anisotropic light scattering; scattering material characterization; polarization dependent scattering; diffusive media; hierarchical structure; biocomposites; wood modification; transparent wood; microfibrils angle; organic materials; polymer active devices; dye lasers; coherence; polarization; degree of polarization.; Fysik; Physics;

    Abstract : Scattering is the main phenomenon of light-matter interaction. In this thesis, we consider one specific case of light propagation in a material whose structure causes anisotropic optical scattering - transparent wood. READ MORE

  4. 17. Blue light induced retinal damage

    Author : Jiangmei Wu; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Visual perception results from a response to radiation between 400 and 760 mu reaching the retina. Photoreceptor cells are differentiated post-mitotic retinal neurons uniquely adapted for the efficient capture of photons and for the initiation of visual transduction. READ MORE

  5. 18. Development and application of Differential Optical Absorption Spectroscopy (DOAS) for Asian urban air monitoring and atmospheric research

    Author : Yu Yong; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Asian cities; air pollution; DOAS; free radicals; aerosol; long-path absorption; emission sources; industrial emission; atmospheric chemistry;

    Abstract : Urban air pollution is a serious concern in developing countries and there is a need for qualified measurements of a range of compounds on a nation-wide basis. A suitable potential technique for air monitoring is Differential Optical Absorption Spectroscopy (DOAS). READ MORE

  6. 19. Excited States of Carotenoids and Their Functions in Light Harvesting

    Author : Donatas Zigmantas; Kemisk fysik; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; spektroskopi; magnetic and optical properties; Carotenoids; light-harvesting; excited states; excitation energy transfer; femtosecond spectroscopy; supraconductors; magnetic resonance; electrical; Condensed matter:electronic structure; time-resolved fluorescence spectroscopy; magnetisk resonans; supraledare; magnetiska och optiska ; egenskaper elektriska; Kondenserade materiens egenskaper:elektronstruktur; relaxation; spectroscopy;

    Abstract : The research presented in this thesis is focused on characterization of photophysical properties of lowest singlet excited states of carotenoids and their functions in the process of photosynthetic light harvesting. It is shown that the various light-harvesting complexes utilize different strategies to achieve efficient energy transfer from carotenoids to (bacterio)chlorophylls. READ MORE

  7. 20. Water-in-diesel emulsion and microemulsion fuels: composition, structure and effect on emissions

    Author : Anna Lif; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NOx; microemulsion; combustion; diffusometry; alternative fuels; emission; emulsion; Fischer-Tropsch; MFC; PM; microfibrillated cellulose; NMR; surfactant; soot; diesel;

    Abstract : Water-in-diesel fuels, as emulsions and microemulsions, give reduced emissions of nitrogen oxides (NOx) and particulate matter (PM) in combustion in diesel engines compared to regular diesel. These fuels can contribute to an improved local environment in densely populated areas as they can replace regular diesel in existing vehicles without any engine modification requirements. READ MORE