Search for dissertations about: "Lukas"

Showing result 1 - 5 of 57 swedish dissertations containing the word Lukas.

  2. 1. Time-Resolved Photoemission Electron Microscopy: Development and Applications

    Author : Lukas Wittenbecher; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; PEEM; time-resolved PEEM; ultrafast optics; pulse shaping; plasmonics; semiconductor nanowires; hot electrons; ultrafast microscopy; charge carrier relaxation;

    Abstract : Time-resolved photoemission electron microscopy (TR-PEEM) belongs to a class of experimental techniquescombining the spatial resolution of electron-based microscopy with the time resolution of ultrafast opticalspectroscopy. This combination provides insight into fundamental processes on the nanometer spatial andfemto/picosecond time scale, such as charge carrier transport in semiconductors or collective excitations ofconduction band electrons at metal surfaces. READ MORE

  4. 2. Growth and Characterization of Tandem-Junction Photovoltaic Nanowires

    Author : Lukas Hrachowina; NanoLund: Centre for Nanoscience; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; III–V semiconductors; nanowire; photovoltaics; tandem junction; MOVPE; EBIC; Fysicumarkivet A:2022:Hrachowina;

    Abstract : In order to satisfy the growing energy needs of our planet’s population, and at the same time mitigate global warming, sustainable energy sources such as solar energy are indispensable. In addition to conventional silicon-based solar cells, nanotechnology offers interesting approaches for complementary applications. READ MORE

  5. 3. Archetype identification in Urban Building Energy Modeling : Research gaps and method development

    Author : Lukas Dahlström; Joakim Widén; Tor Broström; Mikael Mangold; Uppsala universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Energy demand forecasting; Energy modelling; Urban building energy modelling; Cluster analysis; Building archetypes; Engineering Science with specialization in Civil Engineering and Built Environment; Teknisk fysik med inriktning mot byggteknik och byggd miljö; Engineering Science with specialization in Civil Engineering and Built Environment; Teknisk fysik med inriktning mot byggteknik och byggd miljö;

    Abstract : Buildings and the built environment account for a significant portion of the global energy use and greenhouse gas emissions, and reducing the energy demand in this sector is crucial for a sustainable energy transition. This highlights the need for accurate and large-scale estimations and predictions of the future energy demand in buildings. READ MORE

  6. 4. Topics in projective algebraic optimization

    Author : Lukas Gustafsson; Sandra Di Rocco; Kathlén Kohn; Cordian Riener; KTH; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES;

    Abstract : This thesis explores optimization challenges within algebraic statistics, employing both topological and geometrical methodologies to derive new insights. The main focus is the optimization degree of nearest point and Gaussian maximum likelihood estimation problems with algebraic constraints. READ MORE

  7. 5. Lung cancer in Sweden : incidence, diagnosis and survival

    Author : Lukas Löfling; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Globally, lung cancer is the most commonly diagnosed form of cancer, as well as the number one cancer-related cause of death. This thesis includes four population-based studies that considered different aspects of lung cancer, covering incidence, diagnosis and survival. READ MORE