Sökning: "polystyrene"

Visar resultat 1 - 5 av 72 uppsatser innehållade ordet polystyrene.

  1. 1. Test setup for LDMX HCal readout

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

    Författare :Joshua Greaves; [2020]
    Nyckelord :Dark matter; LDMX; dark photon; hadronic calorimeter; photomultiplier tube; Physics and Astronomy;

    Sammanfattning : It is evident from cosmological observations such as the Cosmic Microwave Background, and the motion of galaxies, that the universe consists of approximately 5 times more mass than visible matter can account for. The Light Dark Matter eXperiment (LDMX) will take a unique approach in its hunt for dark matter; it will look for missing momentum signals in electron collisions with a Tungsten target, and will be looking in the sub GeV energy range for evidence of dark matter interactions. LÄS MER

  2. 2. Banning Plastic Straw by Straw: Why California needs a more harmonized approach to plastics management

    Master-uppsats, Lunds universitet/Internationella miljöinstitutet

    Författare :Rachel Adell; [2020]
    Nyckelord :Social Sciences;

    Sammanfattning : Over 150 local communities in California have implemented plastic product bans as a way to decrease stress on landfills, reduce non-recyclable materials, and manage litter. Plastic product bans such as plastic bags, polystyrene, or single-use plastics, are used to address both local (e.g. litter reduction or community aesthetics), and global (e. LÄS MER

  3. 3. Characterization of Magneto-Dielectric Materials for Microwave Devices

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Fasta tillståndets elektronik

    Författare :Joseph Lazraq Byström; [2020]
    Nyckelord :magneto-dielectric materials; permittivity; permeability; losses; antenna and filter miniaturization;

    Sammanfattning : There is an increasing interest in using new composite materials in microwave devices, to reduce size and weight while maintaining similar performances. A new promising material group is named magneto-dielectric materials, which have the permittivity and permeability values both larger than one. LÄS MER

  4. 4. Enhancing the degradation rate of microplastics and organizing a study visit about sustainability

    Uppsats för yrkesexamina på avancerad nivå, KTH/Lärande

    Författare :Marianne Al-Ghorabi; [2020]
    Nyckelord :Accommodation; assimilation; Fenton reaction; microplastics; polypropylene; polystyrene; proximal development zone; study visit; visible light photocatalysis; zinc oxide nanorods; Ackommodation; assimilation; den proximala utvecklingszonen; Fenton reaktion; fotokatalys med synligt ljus; mikroplast; polypropalen; polystyren; studiebesök; zinkoxid nanorör.;

    Sammanfattning : Microplastics take hundreds to thousands of years to degrade in nature, and pose a threat to the environment. A photocatalytical degradation method have been developed to take advantage of solar light to degrade microplastics, however it takes several months to degrade microplastics with the process. LÄS MER

  5. 5. Life Cycle Analysis of three polystyrene waste scenarios : Biodegradation by mealworms as an alternative to incineration or recycling of polystyrene waste?

    Kandidat-uppsats, Mittuniversitetet/Institutionen för ekoteknik- och hållbart byggande

    Författare :Laurens Post; [2020]
    Nyckelord :Polystyrene; Waste management; Recycling; Incineration; Biodegradation; Mealworms; Life Cycle Analysis;

    Sammanfattning : In this research three waste scenario’s for polystyrene plastic are analysed and compared from an environmental perspective. Incineration, recycling and biodegradation by mealworms (Tenebrio Monitor Linnaeus) of polystyrene are to be compared through a gate to grave Life Cycle Analysis. LÄS MER