Sökning: "blockage"

Visar resultat 16 - 20 av 109 avhandlingar innehållade ordet blockage.

  1. 16. Frazil ice at water intakes

    Författare :Annika Andersson; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Applied Geology; Tillämpad geologi;

    Sammanfattning : To provide a better understanding of how frazil ice deposits on trash racks at water intakes, the phenomenon was video recorded at two hydropower plants and in a refrigerated laboratory flume. Initial accretion of frazil ice around a single bar and the motion of particles in the vicinity of an obstacle was simulated through numerical modelling and studied using plastic particles in a laboratory flume. LÄS MER

  3. 17. Chronic Rhinosinusitis with Nasal Polyps - Symptoms, Heredity and Genetics

    Författare :Anton Bohman; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Nasal Polyps; Genetics; Signs and Symptoms; Genome-Wide Association Study; Gene Expression;

    Sammanfattning : ABSTRACT Chronic rhinosinusitis with nasal polyps (CRSwNP) is characterized by long-term inflammation of the paranasal sinuses combined with bilateral glassy protuberances from the middle meatus of the nasal cavity. This disease has an unknown cause, affects roughly 3% of the population and causes symptoms from the upper airways. LÄS MER

  4. 18. Millimeter-Wave Communications for Indoor Dense Spaces : Channel Modeling and Network Deployment

    Författare :Ozan Alp Topal; Cicek Cavdar; Emil Björnson; Ahmed Alkhateeb; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Millimeter wave communication; ray-tracing; channel modeling; access point deployment; convex-concave programming; reconfigurable intelligent surfaces.; Millimetervågsteknik; ray-tracing; kanalmodellering; accesspunktsutbyggnad; konvex-konkav programmering; omkonfigurerbara intelligenta yto; Informations- och kommunikationsteknik; Information and Communication Technology; Telecommunication; Telekommunikation;

    Sammanfattning : In the ever-evolving landscape of wireless communication, the deployment of millimeter-wave (mmWave) technology has emerged as a game-changer for indoor environments. As the demand for high-speed, low-latency connectivity continues to surge, especially in densely populated areas, mmWave access point deployment has gained prominence due to its ability to deliver unprecedented data rates thanks to the available wide bandwidths. LÄS MER

  5. 19. Defect Thermodynamics and Kinetics in Polyanionic Cathodes : A Theoretical Roadmap for Na-ion based Batteries and Hybrid Supercapacitors

    Författare :Teeraphat Watcharatharapong; Rajeev Ahuja; Sudip Chakraborty; Jan Isberg; Palani Balaya; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; DFT; Energy Materials; Defects; Chemical potentials; Kinetics; Hybrid supercapacitors; Na-ion batteries; Polyanionic cathodes;

    Sammanfattning : In this thesis, the framework of the density functional theory is employed to study and predict properties of polyanionic cathodes for Na-ion batteries and hybrid supercapacitors. It consists of three main parts as follows:The first part is primarily dedicated to kröhnkite-type Na2Fe(SO4)22H2O cathode. LÄS MER

  7. 20. Metabolic and immunological interactions between adipose tissue and breast cancer - implications of obesity in tumor progression

    Författare :Peter Micallef; Göteborgs universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Breast cancer; Adipose tissue; Macrophage; Metabolism; Paracrine;

    Sammanfattning : Triple-negative breast cancers have fewer treatment options than other breast cancers. The overall goal of this research is to identify new pharmaceutical targets for triple-negative breast cancer through studies of the tumor-promoting crosstalk between tumor and surrounding adipose tissue. LÄS MER