Essays about: "Linear waves"

Showing result 6 - 10 of 81 essays containing the words Linear waves.

  1. 6. Thermal tolerance of native vs. invasive marine species at the Northern coast of Portugal

    University essay from Uppsala universitet/Institutionen för geovetenskaper

    Author : Sofie Michelsen; [2023]
    Keywords : Biodiversity; Climate change; Marine ecosystems; Marine heat waves; Intertidal environment; Invasive species; Macroalgae; Mussels; Sustainable Development; Thermal tolerance;

    Abstract : Two prominent factors posing a major threat to biodiversity in marine ecosystems are climate change and the establishment of invasive species, and the interaction between these two. Because of the upwelling of cold, nutrient-rich water, the coast of Portugal is a thermal refuge and distribution edge for cold-adapted species, making it a particularly important study area from a biodiversity point of view. READ MORE

  3. 7. Predicting Reactor Instability Using Neural Networks

    University essay from KTH/Fysik

    Author : Hilborn Hubert; [2022]
    Keywords : Boiling Water Reactors; Density Wave Instability; Multi-Layer Perceptron; Support Vector Regression; Kernel-Ridge Regression;

    Abstract : The study of the instabilities in boiling water reactors is of significant importance to the safety withwhich they can be operated, as they can cause damage to the reactor posing risks to both equipmentand personnel. The instabilities that concern this paper are progressive growths in the oscillatingpower of boiling-water reactors. READ MORE

  4. 8. The relation between extreme heat and ENSO and characterization of health risks in relation to varying levels of UTCI

    University essay from Lunds universitet/Ergonomi och aerosolteknologi

    Author : Emanuel Svensson; [2022]
    Keywords : El Niño; ENSO; relative risk; heat waves; cold spells; UTCI; cardiovascular diseases; exposure; Taiwan.; Technology and Engineering;

    Abstract : As a result of climate change, temperatures have been steadily increasing in the last half century and extreme weather events such as storms, extreme heat, extreme precipitation and cold spells have been observed to occur more frequently. This comes with potential consequences for lives and health. READ MORE

  5. 9. Modeling of Low-Energy Neutron Scattering in Liquid Hydrogen Using NCrystal

    University essay from Lunds universitet/Fysiska institutionen; Lunds universitet/European Spallation Source ESS AB; Lunds universitet/Kärnfysik

    Author : Tim Günter; [2022]
    Keywords : ESS; European Spallation Source; neutron; scattering; moderator; liquid hydrogen; modeling; ncrystal; njoy; Physics and Astronomy;

    Abstract : The European Spallation Source ESS, under construction in Lund, Sweden, aims to produce high-brightness and intensity neutrons for a multitude of experiments upon completion. An efficient production of neutrons requires elaborate understanding of the moderation process which slows the neutrons from relativistic speed to a kinetic energy of meV. READ MORE

  6. 10. Computation of Acoustic Wave Propagation Under Water

    University essay from KTH/Matematik (Avd.)

    Author : Frida Thörn; [2022]
    Keywords : Wave equation; Helmholtz equation; Waveholtz iteration; finite difference method; summation by parts; energy method; point source; curvilinear coordinates; vågekvationen; helmholtz ekvation; waveholtz iteration; finita differens methoden; energimetoden; punktkälla; kurvlinjära koordinater; kroklinjiga koordinater; SBP;

    Abstract : In this thesis we look at acoustic wave propagation under water. We look in particular at waves generated by a point source and what happens with the propagation when we model the bottom as flat or as curvilinear. We assume the source to be working at a certain frequency and therefore we model this problem by solving the Helmholtz equation. READ MORE