Essays about: "heavy metal"

Showing result 1 - 5 of 132 essays containing the words heavy metal.

  1. 1. If Trees Could Talk - Dendrochemistry, a Promising Method for Understanding Pollution History

    University essay from Göteborgs universitet/Institutionen för geovetenskaper

    Author : Jonatan Uusitalo; [2023-08-17]
    Keywords : ;

    Abstract : Heavy metal pollution presents a significant environmental challenge in the Anthropocene era, and understanding pollution history is crucial to address historical pollution and implementing effective mitigation measures. This study stands among a few comprehensive dendrochemical investigations that utilized an extensive dataset and energy dispersive X-ray fluorescence (EDXRF) technique to reconstruct the contamination history of As, Cd, Cu, Ni, Pb, and Zn, with a focus on Cu. READ MORE

  3. 2. Investigation of Antenna Radomes in Low Earth Orbits

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : Mathias Manohar Gren; [2023]
    Keywords : Materials; Science; Space; Satellites; Antenna Radomes; Beyond Gravity; Coatings; Physics; Chemistry; Low Earth Orbits; Engineering; Lunds University; Materials Chemistry; Technology and Engineering;

    Abstract : Introduction: This master’s thesis focuses on exploring improved alternative material solutions for antenna radomes used to protect Beyond Gravity Sweden’s satellite antennas in low Earth orbits. Background: As the environment in low Earth orbit is harsh, surface materials on satellites experience high levels of atomic oxygen, ultra violet radiation, thermal-fluctuation, charged particles and micro meteoroids. READ MORE

  4. 3. Sargassum digestate as fertiliser in Grenada

    University essay from KTH/Hållbar utveckling, miljövetenskap och teknik

    Author : Lina Bengtsson; Theodor Halldin; [2023]
    Keywords : Sargassum; digestate; fertiliser; heavy metals; Sargassum; digestat; gödningsmedel; tungmetaller;

    Abstract : Surges of Sargassum have become more severe and at the time of writing the largest surge yet is set to hit the Caribbean islands, affecting tourism and marine life negatively. Tourism is Grenada’s single handedly largest economic sector, which is why it is important to research the use of Sargassum. READ MORE

  5. 4. Characterization of NiMo catalysts with noble metal promoters

    University essay from Lunds universitet/Kemiteknik (CI)

    Author : Filip Hallböök; [2023]
    Keywords : Catalysis; Hydrodeoxygenation; TPR; NiMo-catalysts; Chemical engineering; Chemistry;

    Abstract : To be able to face the challenges brought on by climate change there is an urgent need to reduce the heavy dependence on fossil fuels. Bio-oil is one such renewable and carbon-neutral replacement that has shown promising potential. A key step in making bio-oil commercially feasible is improvements of the upgrading processes of the bio-oil. READ MORE

  6. 5. Comparative Evaluation of Sentiment Analysis Methods

    University essay from Göteborgs universitet/Institutionen för data- och informationsteknik

    Author : Kieron Hayes; [2022-06-20]
    Keywords : Sentiment analysis; BERT; Rule-based; Domain-specific; SentiWordNet;

    Abstract : Sentiment analysis is an on-going field of research within the realm of Natural Language Processing, in which we wish to accurately assess the sentiment of an author on a given topic. Within this thesis project I construct a rule-based system for sentiment analysis specific to the domain of hard rock and heavy metal music album reviews. READ MORE