Essays about: "Absorbing Layers"

Showing result 1 - 5 of 12 essays containing the words Absorbing Layers.

  1. 1. X-Ray Fluorescence of Metal Halide Perovskites

    University essay from Lunds universitet/Synkrotronljusfysik; Lunds universitet/Fysiska institutionen

    Author : Samuel Narciso Silva; [2022]
    Keywords : Perovskite; X-ray; Fluorescence; Python; PyMCA; Synchrotron radiation; Physics and Astronomy;

    Abstract : This thesis has the aim to provide a framework for analyzing X-ray fluorescence (XRF) data obtained from German Electron-Synchrotron Group (DESY). The theoretical analysis shows that XRF competes with Auger emission, and works mainly for elements with high atomic number. Here, incident X-rays of 13. READ MORE

  3. 2. Numerical simulation of acoustic wave propagation with a focus on modeling sediment layers and large domains

    University essay from Uppsala universitet/Avdelningen för beräkningsvetenskap

    Author : Elias Estensen; [2022]
    Keywords : Helmholtz; wave equation; acoustics; ocean acoustics; numerical analysis; computational science; finite differences; summation by parts; sbp; waveholtz; cylindrical coordinates; sediment layers; interface; super-grid; super grid; absorbing layer; Helmholtz; vågekvationen; akustik; undervattensakustik; numerisk analys; beräkningsvetenskap; finita differenser; summation by parts; sbp; cylindriska koordinater; waveholtz; sedimentskikt; interface; super-grid; absorberande lager;

    Abstract : In this report, we study how finite differences can be used to simulate acoustic wave propagation originating from a point source in the ocean using the Helmholtz equation. How to model sediment layers and the vast size of the ocean is studied in particular. READ MORE

  4. 3. Alternative Architectures of Quantum Dot Solar Cells

    University essay from KTH/Tillämpad fysikalisk kemi

    Author : Astrid Bergman; [2021]
    Keywords : Quantum dots; Solar cells; PbS; Alternative architectures; electron transporting layer; Kvantprickar; solceller; PbS; alternativa arkitekturer; elektrontransportlager;

    Abstract : Kvantprickar är intressanta för tillverkning av solceller på grund av möjligheten att justera bandgapet beroende på kvantpricksstorleken. I detta examensarbete har alternativa arkitekturer av PbS kvantprickssolceller testats samt att påverkan av olika lager har utvärderats. READ MORE

  5. 4. Modular Sound Absorbing Unit : A system solution for implementation of noise abatement appliance in indoor environments

    University essay from Luleå tekniska universitet/Institutionen för ekonomi, teknik och samhälle

    Author : William Odevik; Viktor Wästersved Nyberg; [2020]
    Keywords : Noise; Sound Absorber; Modular; Novel Materials; Buller; Ljudabsorbent; Modulär; Okonventionellt Material;

    Abstract : There is a rising concern about the effects of noise on human health. The noise from our technologies and comforts that evokes a negative physiological response as a response, effects like cardiovascular disease, cognitive and hearing impairments are all examples of critical health results stemming from prolonged noise exposure (WHO, 2004 & 2018). READ MORE

  6. 5. Evaluation, adaption and implementations of Perfectly Matched Layers in COMSOL Multiphysics

    University essay from KTH/Numerisk analys, NA

    Author : Simon Erlandsson; [2020]
    Keywords : Applied mathematics; computational mathematics; finite element method; FEM; perfectly matched layer; PML; COMSOL; Tillämpad matematik; beräkningsteknik; finita elementmetoden; FEM; PML; COMSOL;

    Abstract : Perfectly matched layer (PML) is a commonly used method of absorbing waves at a computational boundary for partial differential equation (PDE) problems. In this thesis, methods for improving the usability of implementations in Comsol Multiphysics is addressed. READ MORE