Sökning: "hull"

Visar resultat 1 - 5 av 89 avhandlingar innehållade ordet hull.

  1. 1. Prevalence and incidence of and risk factors for asthma and exercise-induced laryngeal obstruction in elite endurance athletes

    Författare :Tommie Irewall; Nikolai Stenfors; Anne Lindberg; Estelle Naumburg; James Hull; Umeå universitet; []
    Nyckelord :MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; asthma; exercise-induced laryngeal obstruction; EILO; continuous laryngoscopy during exercise test; CLE; prevalence; risk factors; incidence; athletes; skiers; endurance athletes; Sports Medicine; idrottsmedicin; lungmedicin; Lung Medicine; Oto-Rhino-Laryngology; oto-rhino-laryngologi;

    Sammanfattning : Background: Asthma is highly prevalent in endurance athletes, but we lack up-to-date information on the prevalence and incidence of asthma in cross-country skiers. Exercise-induced laryngeal obstruction (EILO) is an important differential diagnosis to exercise-induced asthma, and its symptoms can mimic asthma. LÄS MER

  2. 2. The Impact of Pancreatic Islet Vascular Heterogeneity on Beta Cell Function and Disease

    Författare :Sara Ullsten; Per-Ola Carlsson; Joey Lau; Sara Bohman; Rebecca L. Hull; Uppsala universitet; []
    Nyckelord :Pancreatic islets; heterogeneity; islet vascularity; blood flow; islet transplantation; islet amyloid; insulitis; type 1 diabetes; beta cell proliferation; Medicinsk vetenskap; Medical Science;

    Sammanfattning : Diabetes Mellitus is a group of complex and heterogeneous metabolic disorders characterized by hyperglycemia. Even though the condition has been extensively studied, its causes and complex pathologies are still not fully understood. The occurring damage to the pancreatic islets is strikingly heterogeneous. LÄS MER

  3. 3. The Enemy Below - Adhesion and Friction of Ship Hull Fouling

    Författare :Dinis Oliveira; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ship resistance; in-water hull cleaning; roughness; biofouling; hull grooming; frictional resistance; adhesion strength; turbulent boundary layer; hull form factor;

    Sammanfattning : Below the waterline, commercial ships are good targets for marine organisms to attach and proliferate, a problem commonly known as biofouling. A fouled hull means higher hydrodynamic resistance, which can result in significant fuel penalties. LÄS MER

  4. 4. Roughest hour – approaches to ship hull fouling management

    Författare :Dinis Oliveira; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; ENGINEERING AND TECHNOLOGY; vessel performance; fouling control coatings; hull grooming; ship resistance; adhesion strength; in-water hull cleaning; biofouling; roughness; turbulent boundary layer;

    Sammanfattning : Submerged surfaces at sea are colonized by a high diversity of sessile (i.e. attached) life forms. As the merchant fleet capacity increases, responding to growth in demand for seaborne transport, so does the hull wetted surface area that is prone to colonization by these sessile organisms, i. LÄS MER

  5. 5. The Hydrodynamics of Waterjet/Hull Interaction

    Författare :Arash Eslamdoost; Chalmers University of Technology; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; trim angle; vena-contracta; transom clearance; net thrust; waterjet hull interaction; waterjet propulsion; capture area; exit drag; non-linear free-surface; intake drag; gross thrust; sinkage; streamtube; RANS; thrust deduction; potential flow; VOF;

    Sammanfattning : The objective of the present investigation is to explore the physics behind the waterjet/hull interaction, and in particular the negative thrust deduction often reported in the semi-planing speed range. Another objective is to propose a validated numerical technique for computing the hydrodynamics of waterjet-driven hulls. LÄS MER