Sökning: "orenheter"

Visar resultat 1 - 5 av 21 uppsatser innehållade ordet orenheter.

  1. 1. Possibilities of Reducing Internal Scrap Rates and Increase Scrap Recyclability of Dilute Copper Alloys from Vertical Upwards Continuous Cast (VUCC) Process

    Master-uppsats, Lunds universitet/Centrum för analys och syntes

    Författare :Minna Olsson; [2023]
    Nyckelord :metallurgy; copper; alloy; continuous casting; materials chemistry; Technology and Engineering;

    Sammanfattning : Copper and copper alloys are important material systems for the electrification of society. The high workability of the materials makes them appropriate in numerous different applications which require highly conductive properties. LÄS MER

  3. 2. The effect of disorder on the axial anomaly in a lattice model in 1 + 1 dimensions

    Master-uppsats, KTH/Fysik

    Författare :Agnes Wattrang; [2023]
    Nyckelord :Axial anomaly; tight-binding model; semiclassical physics; correlated disorder.; Axial kiral anomali; tätbindningsmodell; semiklassisk fysik; korrelerad oordning;

    Sammanfattning : This work investigates the effect of a disorder potential, that represents impurities/dislocations in the lattice, on the time-dependent signature of the axial anomaly in a one-band tight-binding model in one spatial dimension. The tight-binding model is solved numerically and the simulation results are compared with a semiclassical expression for the time-dependent axial density, n5(t), due to Nielsen and Ninomiya [1]. LÄS MER

  4. 3. Water Quality Device : Testing Through Electronic Measurements

    Kandidat-uppsats, Högskolan i Halmstad/Akademin för informationsteknologi

    Författare :Jihad Adnan Abdu; Philip Lundström; [2023]
    Nyckelord :Water Quality; Water; Electronics; Physics; Embedded Systems; Pollution; Water Pollution; Water Quality Device; Arduino Uno Rev3; Vattenkvalitet; Förorening; Vatten; Vattenförorening;

    Sammanfattning : Water is the source of all life, but unfortunately, the water quality is getting only worse due to many factors like overuse, contamination, indifference and even by nature itself. By identifying the problem, we are one step closer to solving the problem, and that is why an intelligent water quality device is required to examine water and detect impurities within it. LÄS MER

  5. 4. Circularity of aluminium: Mapping difficulties in scrap circulation : A literature study and interviews with actors with focus on aluminium circulation in Sweden

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Felix Fernström; Erik Karpe; Paul Thellenberg; [2022]
    Nyckelord :Aluminium; Aluminium alloys; contaminants; impurities; scrap; tramp elements; Aluminium; aluminiumlegeringar; föroreningar; orenheter; skrot; spårämnen;

    Sammanfattning : Aluminium has great properties that are utilised the world over, but the production of primary aluminium is very energy intensive. In order to reduce the energy-cost, the aluminium can be recycled by re-melting aluminium scrap. LÄS MER

  7. 5. First principles DFT study of polyethylene insulation containing chemical impurities - implementing counterpoise correction

    Master-uppsats, KTH/Tillämpad fysik

    Författare :Max Pierre; [2022]
    Nyckelord :Applied physics; HVDC cable; Polymer physics; Polyethylene; Density functional theory; Molecular dynamics; CP2K; GROMAC; Electron traps; Band gaps; Density of states; Tillämpad fysik; HVDC kabel; Polymerfysik; Polyeten; Täthetsfunktionalteori; Molekulärdynamik; CP2K; GROMACS; Elektronfällor; Bandgap; Tillståndstäthet;

    Sammanfattning : Density functional theory (DFT) calculations of polyethylene (PE) HVDC cable insulation have been performed for systems containing four different chemical impurities: acetophenone, cumene, $\alpha$-methyl styrene and $\alpha$-cumyl alcohol. Systems were generated by molecular dynamics (MD) equilibration at four different temperatures relevant for cable insulation applications: 277 K, 293 K, 343 K and 363 K. LÄS MER