Sökning: "Tides"

Visar resultat 1 - 5 av 33 avhandlingar innehållade ordet Tides.

  1. 1. Adaptation of wave power plants to regions with high tides

    Författare :Mohd Nasir Ayob; Rafael Waters; Johan Abrahamsson; Ian Masters; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Wave energy; Tides; Wave Hub; Lysekil research site; Control system; Tidal compensator; Wave energy converter.; Engineering Science with specialization in Science of Electricity; Teknisk fysik med inriktning mot elektricitetslära;

    Sammanfattning : The wave energy converter (WEC) developed at Uppsala University is based on the concept of a heaving point absorber with a linear generator placed on the seafloor. The translator inside the generator oscillates in a linear fashion and is connected via a steel wire to a point absorbing buoy. LÄS MER

  3. 2. Spiritum sidus : The star of our life – On internal tides in the ocean

    Författare :Gaspard Geoffroy; Jonas Nycander; Christian Stranne; Aurélien Ponte; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Internal waves; Tides; Argo floats; Time series analysis; Flow-topography interaction; Atmospheric Sciences and Oceanography; atmosfärvetenskap och oceanografi;

    Sammanfattning : Tidal currents flowing over rough bathymetry generate internal tides. These internal waves with tidal frequency can be decomposed into vertical modes. Low modes generally travel thousands of kilometers, until they break due to shear flow instabilities, while high modes are believed to break close to the generation site. LÄS MER

  4. 3. New Tides in Shipping : Studying incumbent firms in maritime energy transitions

    Författare :Ignė Stalmokaitė; Björn Hassler; Johanna Yliskylä-Peuralahti; Tommy Larsson Segerlind; René Taudal Poulsen; Södertörns högskola; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; shipping; incumbent firms; maritime energy transitions; multi-level perspective; dynamic capabilities; regime-niche interactions; decarbonisation; air-borne emissions; sustainability transitions; Environmental Studies; Miljövetenskapliga studier; Östersjö- och Östeuropaforskning; Baltic and East European studies;

    Sammanfattning : Shipping is a cornerstone of global transportation responsible for moving large volumes of traded goods. At the same time, negative environmental impacts of shipping operations have attracted growing concerns. LÄS MER

  5. 4. Sea Level Compensation System for Wave Energy Converters

    Författare :Valeria Castellucci; Rafael Waters; Ronan Costello; Uppsala universitet; []
    Nyckelord :Ocean energy; Tides; Linear generator; Point absorber; Offshore experiment; Hydro-mechanic modeling; Power absorption; Control system; Communication system; Measurement system; Lysekil research site; Wave Hub.;

    Sammanfattning : The wave energy converter developed at Uppsala University consists of a linear generator at the seabed driven by the motion of a buoy on the water surface. The energy absorbed by the generator is negatively affected by variations of the mean sea level caused by tides, changes in barometric pressure, strong winds, and storm surges. LÄS MER

  7. 5. Novel approaches to the environments and ecosystems of the fish-tetrapod transition

    Författare :Hannah Byrne; Per Ahlberg; Grzegorz Niedzwiedzki; Henning Blom; Benjamin P. Kear; Matt Friedman; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; fish-tetrapod transition; synchrotron scanning; tides; coprolites; Carboniferous;

    Sammanfattning : The fish-tetrapod transition is one of the most important evolutionary events in Earth’s history, giving rise to terrestrial vertebrates around 390 million years ago. It set the stage for a series of evolutionary events that ultimately resulted in modern-day terrestrial vertebrates including ourselves. LÄS MER