Search for dissertations about: "Extinction ratio"

Showing result 1 - 5 of 32 swedish dissertations containing the words Extinction ratio.

  2. 1. Extinction in Molecular Clouds : Case of Barnard 335

    Author : Sven Olofsson; Göran Olofsson; Kalevi Mattila; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; ISM; interstellar medium; extinction; molecular cloud; Astronomy; astronomi; Astronomy; astronomi;

    Abstract : The Bok globule B335 is a small molecular cloud in the solar neighbourhood near the galactic plane. The aim for this three-paper-study is to construct and analyze the extinction for this globule. The method we apply is to use the light from field stars behind the cloud in broadband filters ranging from UV to the mid-infrared. READ MORE

  4. 2. Plasmonic Properties of Pt and Pd Nanodisks

    Author : Christoph Langhammer; Chalmers tekniska högskola; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; scattering; electron-hole pairs; plasmon mediated photochemistry; Pd; Localized Surface Plasmon Resonance; Pt; plasmon decay; absorption; extinction; branching ratio;

    Abstract : .... READ MORE

  5. 3. Genomic analysis of the process leading up to the extinction of the woolly mammoth

    Author : Patrícia Pečnerová; Love Dalén; Mark Thomas; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; woolly mammoth; Mammuthus primigenius; extinction; Wrangel Island; ancient DNA; palaeogenetics; population genetics; genomics; genomic erosion; genetic drift; inbreeding; population size; Systematic Zoology; zoologisk systematik och evolutionsforskning;

    Abstract : Species worldwide are subject to contractions in both abundance and geographical range, and their persistence in a changing environment may thus depend on the ability to survive in small and fragmented populations. Despite the urgent need to understand how extinction works, our knowledge of pre-extinction genetic processes is limited because techniques allowing population and conservation genomics to be studied in wild threatened populations have become available only recently. READ MORE

  6. 4. Extragalactic extinction and spectral properties of Type Ia supernovae

    Author : Linda Östman; Ariel Goobar; Avishay Gal-Yam; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Type Ia supernovae; cosmology; spectroscopy; dust extinction; quasars; axions; Physics; Fysik; fysik; Physics;

    Abstract : The use of Type Ia supernovae as standardisable candles for probing cosmological parameters with high precision requires good knowledge about how the supernova light is affected along the line of sight and how the intrinsic brightness varies between objects. The work in this thesis addresses these topics. READ MORE

  7. 5. Signal restoration with the nonlinear optical loop mirror

    Author : Beng-Erik Olsson; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; fiber couplers; extinction ratio; pulse extraction; nonlinear filtering; noise filtering; nonlinear optics; amplified spontaneous emission; optical switching; signal polarization independent noise filter; nonlinear optical loop mirror; sagnac interferometer; high intensity optical pulses;

    Abstract : .... READ MORE