Sökning: "infrared"

Visar resultat 26 - 30 av 643 uppsatser innehållade ordet infrared.

  1. 26. Mercury accumulation in lake sediments on different time scales – the influence of algal primary production

    Master-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Anne Rebotzke; [2023]
    Nyckelord :mercury; lake sediment; primary productivity; algal scavenging; biogenic silica; diatom proxy; chlorophyll-a; organic matter;

    Sammanfattning : The aim of this work is to test the proposed approach of algal scavenging as a driver of sediment mercury (Hg) on different time scales and to gain a better understanding of the mechanisms of Hg accumulation in lake sediments. A 3000-year sediment record from Nylandssjön in northern Sweden was analysed for this purpose, as well as a 20-year sediment record from the seasonal sediment traps of this lake. LÄS MER

  3. 27. Asymptotic Symmetries and Dressed States in QED and QCD

    Master-uppsats, Stockholms universitet/Fysikum

    Författare :Saimeng Zhou; [2023]
    Nyckelord :Dressed states; Large gauge transformation; Faddeev-Kulish formalism; Generalized coherent state operator; Wilson line; Infrared divergence; Asymptotic Hamiltonian; QED; QCD;

    Sammanfattning : Infrared divergences arising in theories with massless gauge bosons have been shown to cancel in scattering amplitudes when using dressed states constructed from the Faddeev- Kulish approach to the asymptotic states. It has been established that these states are closely related to asymptotic symmetries of the theory, that is, non-vanishing gauge trans- formations at the asymptotic boundary. LÄS MER

  4. 28. Chemical modification of starch in order to get thermoplastic properties

    Kandidat-uppsats, KTH/Materialvetenskap

    Författare :Emma Hallbert; Elsa Wadman; [2023]
    Nyckelord :thermoplastic starch; dialdehyde starch; schiff-base; imine chemistry; termoplastisk stärkelse; dialdehydstärkelse; schiffbas; iminkemi;

    Sammanfattning : There are numerous advantages of replacing traditional non-biodegradable synthetic plastics with bio-based plastics. Starch is globally available, cheap, renewable, and biodegradable. However, starch has a poor product performance and is relatively difficult to process, as conventional melt processing techniques cannot be used. LÄS MER

  5. 29. Blink detection in eye tracking

    Kandidat-uppsats, KTH/Skolan för teknikvetenskap (SCI)

    Författare :Sean Howat; [2023]
    Nyckelord :Eyetracking; Blink detection; SVM;

    Sammanfattning : This report discusses the accuracy of blink detection in eye tracking, using machine learningalgorithms. Blink detection is used in a wide variety of medicinal and psychological applica-tions such as a controller for motor impaired individuals. Image classification has recentlybeen used in eye tracking and blink detection applications. LÄS MER

  7. 30. Optical properties of water absorbing textiles for camouflage

    Master-uppsats, Linköpings universitet/Institutionen för fysik, kemi och biologi

    Författare :Eveline Örtenberg; [2023]
    Nyckelord :Camouflage; SWIR; Water; Nanocellulose; CNF; Textiles;

    Sammanfattning : Background matching, a form of camouflage, involves species developing patterns and coloration that closely resemble their environment. Humans have utilized camouflage and background matching, particularly in military applications, to reduce detectable characteristics, known as signatures. LÄS MER