Search for dissertations about: "V White"

Showing result 1 - 5 of 81 swedish dissertations containing the words V White.

  1. 1. Color Tuning for Perovskite Light-Emitting Diodes

    Author : Hongling Yu; Feng Gao; Xiaoke Liu; Olle Inganäs; Fengling Zhang; Maksym V. Kovalenko; Linköpings universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Perovskite light-emitting diodes; Color tuning; Pure and mixed halide; Spectral stability; White emission;

    Abstract : Metal halide perovskites (MHPs) are recognized as promising semiconductor materials for a variety of optical and electrical device applications due to their cost-effective and outstanding optoelectronic properties. As one of the most significant applications, perovskite light-emitting diodes (PeLEDs) hold promise for future lighting and display technologies, attributed to their high photoluminescence quantum yield (PLQY), high color purity, and tunable emission color. READ MORE

  2. 2. Luminescence Properties of ZnO Nanostructures and Their Implementation as White Light Emitting Diodes (LEDs)

    Author : Naveed ul Hassan Alvi; Magnus Willander; Omer Nour; Vladimir V. Mitin; Linköpings universitet; []
    Keywords : Nanotechnology; Zinc oxide; nanostructures; luminescence; LEDs; color rendering; NATURAL SCIENCES; NATURVETENSKAP;

    Abstract : In this thesis, luminescence properties of ZnO nanostructures (nanorods, nanotubes, nanowalls and nanoflowers) are investigated by different approaches for possible future application of these nanostructures as white light emitting diodes. ZnO nanostructures were grown by different growth techniques on different p-type substrates. READ MORE

  3. 3. Non-intrusive Methods for Mode Estimation in Power Systems using Synchrophasors

    Author : Vedran Peric; Luigi Vanfretti; Xavier Bombois; Cristian Rojas; Mani V. Venkatasubramanian; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Synchrophasors; Phasor measurement units; system identification; mode estimation; electromechanical oscillations; prediction error; signal selection; experiment design; probing; Electrical Engineering; Elektro- och systemteknik;

    Abstract : Real-time monitoring of electromechanical oscillations is of great significance for power system operators; to this aim, software solutions (algorithms) that use synchrophasor measurements have been developed for this purpose. This thesis investigates different approaches for improving mode estimation process by offering new methods and deepening the understanding of different stages in the mode estimation process. READ MORE

  4. 4. Striving against adversity. : the dynamics of migration, health and poverty in rural South Africa

    Author : Mark A Collinson; Peter Byass; Gunnar Malmberg; Kathleen Kahn; Michael White; Umeå universitet; []
    Keywords : MEDICAL AND HEALTH SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; migration; temporary migration; permanent migration; refugee settlement; socioeconomic status; HIV transmission; adult mortality; child mortaality; returning to die; Epidemiology; Epidemiologi; Epidemiology; epidemiologi;

    Abstract :  Background: The study is based in post-apartheid South Africa and looks at the health and well being of households in the rural northeast. Temporary migration remains important in South Africa because it functions as a mainstay for income and even survival of rural communities. READ MORE

  5. 5. The justification and legitimacy of the active welfare state : some philosophical aspects

    Author : Mikael Dubois; Sven Ove Hansson; Stuart White; KTH; []
    Keywords : HUMANITIES; HUMANIORA; HUMANIORA; HUMANITIES; Political philosophy; social justice; justification; legitimacy; welfare state; social insurance; prevention; conditionality; active welfare state; Philosophy; Filosofi;

    Abstract : This thesis has two aims. The first aim is to set out an argument for social insurance in the form of compulsory income insurance in the event of sickness or unemployment, and to explore two lines of arguments for social insurance policies that are commonly associated with an active welfare state that seeks to prevent or reduce reliance on social insurance. READ MORE