Sökning: "Particle counter"

Visar resultat 1 - 5 av 17 uppsatser innehållade orden Particle counter.

  1. 1. Gap properties of helical edge states in two-dimensional topological insulators with time-dependent magnetic impurities

    Master-uppsats, Lunds universitet/Fasta tillståndets fysik; Lunds universitet/Fysiska institutionen

    Författare :Simon Wozny; [2020]
    Nyckelord :topological insulators; edge states; impurities; density of states; Green s function; Floquet; Physics and Astronomy;

    Sammanfattning : The quantum mechanical equivalent of the classical Hall effect can lead to interesting results in solid state physics. A similar effect, that has received attention in recent years, occurs when large spin-orbit coupling is present in a material, the so-called quantum-spin Hall effect. LÄS MER

  2. 2. Evaluation of a heated inlet to reduce humidity induced error in low-cost particulate matter sensors

    Master-uppsats, Lunds universitet/Ergonomi och aerosolteknologi

    Författare :Piotr Czernicki; Mathias Kallmert; [2019]
    Nyckelord :particulate matter; optical particle counter; relative humidity; low-cost; pm sensor; heated inlet; Technology and Engineering;

    Sammanfattning : The number of low-cost particulate matter (PM) sensors available on the market has increased in recent years. They are affordable, compact and require no maintenance which means they easily can be deployed and utilized for real-time air monitoring. However, the accuracy of low-cost PM sensors has been reported to vary depending on several factors. LÄS MER

  3. 3. Atmospheric soot particle transformation from urban to rural

    Kandidat-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Fredrik Johansson; [2018]
    Nyckelord :Aerosol; soot; atmosphere; Physics and Astronomy; Earth and Environmental Sciences;

    Sammanfattning : The main objective of this work was to investigate if there is a contribution of aerosol from the urban region of Copenhagen at the rural station Vavihill. This was done by analyzing measurement data between 1st of January and the 28th of February 2013 measured with a Dierential Mobility Particle Sizer (DMPS), Soot Particle Aerosol Mass Spectrometer (SP-AMS), a Cloud Condensation Nuclei Counter (CCNC) and a NOx-analyzer. LÄS MER

  4. 4. Comparative analysis of winch-based wave energy converters

    Kandidat-uppsats, KTH/Maskinkonstruktion (Inst.)

    Författare :Aleksandar Nachev; [2017]
    Nyckelord :;

    Sammanfattning : Renewable energy sources are probably the future of the mankind. The main points advocating wave energy in particular include its huge potential, low environmental impact and availability around the globe. LÄS MER

  5. 5. Two-Dimensional Radiation Field Map of a Be-based Source

    Kandidat-uppsats, Lunds universitet/Kärnfysik; Lunds universitet/Fysiska institutionen

    Författare :Henrik Söderhielm; [2017]
    Nyckelord :Nuclear Physics Particle Detectors Neutrons Gamma Rays European Spallation Source Lund University; Physics and Astronomy;

    Sammanfattning : The aim of this project was to measure the profile of the radiation exiting an aperture of the Aquarium at the Source Testing Facility at the Division of Nuclear Physics at Lund University. So far, the outgoing beam of radiation at the aperture of the Aquarium has been assumed to be uniform. LÄS MER