Search for dissertations about: "Björn LU"

Showing result 1 - 5 of 85 swedish dissertations containing the words Björn LU.

  2. 1. Evaluation of Asphalt Field Cores with Simple Performance Tester and X-ray Computed Tomography

    Author : Florentina Angela Farcas; Björn Birgisson; Xiaohu Lu; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; asphalt mixture; dynamic modulus; flow number; simple performance tester; X-ray computed tomography; air voids distribution;

    Abstract : The importance of aggregate structure and air voids distribution for asphalt mixture rutting and cracking performance has been well established on the basis of experience and is well documented in the literature. Past and current investigations are limited to assessment of performance based on macroscopic behavior due to the difficulty associated with the quantitative measurement and analysis of the internal structure of asphalt mixtures. READ MORE

  4. 2. Minerals and their dispersive interaction with bitumen

    Author : Åsa Laurell Lyne; Björn Birgisson; Xiaohu Lu; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; bitumen; aggregate; mineral; adhesion; stripping; refractive index; Hamaker constant; Civil engineering and architecture; Samhällsbyggnadsteknik och arkitektur; Materials science; Teknisk materialvetenskap;

    Abstract : .... READ MORE

  5. 3. Structure, Morphology, and Catalytic Properties of CuOx/CeO2 Model Catalysts

    Author : Björn Skårman; Centrum för analys och syntes; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Synchrotron radiation; High-energy Diffraction; X-ray Absorption Fine Structure Spectroscopy.; Chemical technology and engineering; Kemiteknik och kemisk teknologi; Chemistry; Kemi; Material technology; Materiallära; materialteknik; X-ray photoelectron spectroscopy; Atomic force microscopy; Gatan Image Filter GIF ; Energy-filtered TEM; High-resolution electron microscopy; Inert gas condensation IGC ; rf Magnetron sputtering; Thermal activation; Batch reactor; Carbon monoxide oxidation; Surface sensitivity; Catalytic anisotropy; Growth; Nucleation; Topography; Roughness; Core-shell structures; Morphology; Nanostructured; Nanocomposite; Nanoparticles; Surface structure; Polycrystalline surfaces; Thin films; Copper oxide; Cerium dioxide CeO2 ; Ceria;

    Abstract : Cerium dioxide, or ceria, is a chemically stable oxygen ion conducting material with a capacity to store and release oxygen, and is therefore extensively used in combustion catalysts. The Cu-Ce-O system has been identified as one of the most active catalysts for the combustion of carbon monoxide. READ MORE

  6. 4. An Essay on Copper Flat Axes

    Author : Björn Magnusson Staaf; Arkeologi; []
    Keywords : HUMANIORA; HUMANITIES; HUMANIORA; HUMANITIES; Arkeologi; Archaeology; value rationality.; being-in-the-world; conceptual polemic; reason; cultural discourse; typology; Copper flat axe; project; domain; station; trajectory; Agency; cognition;

    Abstract : This dissertation can be read on at least two levels. On one level it will deal with- how general patterns of cognitive perception set frames for and affect human action in history and how these patterns may change. A study on copper flat axes will serve as a foundation for this discussion. READ MORE

  7. 5. Modelling of Transport Processes Involved in Service Life Prediction of Concrete : Important Principles

    Author : Björn Johannesson; Göran Fagerlund; Avdelningen för Byggnadsmaterial; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; teori; beräkningsmodeller; finita element; beständighet; betong; livslängd; nedbrytning; sprickor; deformationer; hållfasthet; korrosion; klorider; fukt; simulering; luftporer; adsorption; beräkningsmetoder; desorption; Byggteknik; Civil engineering; teori; beräkningsmodeller; finita element; beständighet; betong; livslängd; nedbrytning; sprickor; deformationer; hållfasthet; korrosion; klorider; fukt; simulering; luftporer; adsorption; beräkningsmetoder; desorption;

    Abstract : The main focus in this licentiate thesis is a description of the environmentally introduced action of diffusing and chemically reactive (e.g. carbonation and chemical-physical adsorption-desorption) matter in the pore solution and in the air-filled space in the pore system of the material. READ MORE