Sökning: "Marina Klara"

Visar resultat 1 - 5 av 30 uppsatser innehållade orden Marina Klara.

  1. 1. From Ocean to Table: Microplastic contamination in Nordic salts

    Kandidat-uppsats, Lunds universitet/Centrum för miljö- och klimatvetenskap (CEC)

    Författare :Anna Nyika; [2023]
    Nyckelord :Microplastic MP ; MP pollution; plastic pollution; sea salt; rock salt; Nordics; Iceland; Denmark; plastic waste management; human health; marine environment.; Earth and Environmental Sciences;

    Sammanfattning : Large amounts of plastic in the oceans originate from mismanaged plastic waste, and microplastics (MPs) are the most common type of waste. They can be found in household products, such as sea salts. Therefore, monitoring pollution levels is essential to improve marine health and food safety. LÄS MER

  3. 2. Mätrigg för givarplacering på provfordon

    Kandidat-uppsats, KTH/Maskinkonstruktion

    Författare :Marcus Johan Haeggman; [2023]
    Nyckelord :measurement rig; design; truck; testing; product development; mätrigg; design; lastbil; provning; produktutveckling;

    Sammanfattning : Scania är en av världens största lastbils- och busstillverkare och leverantör av motorer för industri och marina applikationer. Detta examensarbete har undersökt olika tekniska lösningar för att öka precisionen och tillförlitligheten i placeringen av givare på Scanias provfordon. LÄS MER

  4. 3. Effects of vegetation and nutrients on methanotroph abundance and methane emissions from constructed wetlands

    Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

    Författare :Klara Yngve; [2022]
    Nyckelord :Diffusive flux; Ebullition; Dissolved CH4; CH4 oxidation; Phosphorous;

    Sammanfattning : Agriculture is the largest anthropogenic source of nitrogen and phosphorous (P) leakage to Swedish coastal seas, causing eutrophication which threatens marine ecosystems. Constructing wetlands is one way to improve nutrient retention in the modern agricultural landscape. However, constructed wetlands can emit substantial amounts of methane (CH4). LÄS MER

  5. 4. PlaCo : The plastic collecting robot

    Kandidat-uppsats, KTH/Mekatronik

    Författare :Annie Persson; Johanna Bergsten; [2021]
    Nyckelord :Arduino; IR-sensor; marine debris; mechatronics; microplastics; ultrasonic sensor; Arduino; IR-sensor; marin nedskräpning; mekatronik; mikroplaster; ultraljudssensor;

    Sammanfattning : The oceans are an essential global resource for all living organisms but especially for us humans. However, year after year we continue to neglect proper recycling of our waste, resulting in litter ending up in our oceans. The majority of said litter comes from single use plastic items. LÄS MER

  7. 5. HVDC transformer core resonance calculation

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Axel Thorstrand; [2021]
    Nyckelord :HVDC; High Voltage Direct Current; Transformer core; Natural frequencies; Energy method-based equation; HVDC; Högspänning likström; Transformatorkärna; Naturliga frekvenser; Energimetod;

    Sammanfattning : Transformers emit a characteristic humming noise due to magnetostriction which is the continuous change in dimensions during magnetization. The noise is amplified if the induced frequencies match the core’s natural frequencies, consequently avoiding geometries that create resonance is critical in order to fulfill customer sound level requirements. LÄS MER