Sökning: "Samuel David"

Visar resultat 6 - 9 av 9 avhandlingar innehållade orden Samuel David.

  1. 6. High-Quality Perovskite Films for Efficient and Stable Light-Emitting Diodes

    Författare :Heyong Wang; Feng Gao; Olle Inganäs; Xiaoke Liu; Ifor David William Samuel; Linköpings universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; perovskite light-emitting diodes; efficiency; stability; growth process; ion migration;

    Sammanfattning : Metal halide perovskites have attracted significant attention for light-emitting applications, because of their excellent properties, such as high photoluminescence quantum yields (PLQYs), good charge mobility, narrow emission bandwidth, readily tunable emission spectra ranging from ultraviolet to near-infrared, and solution processability. Since the first room-temperature perovskite-based light-emitting diodes (PeLEDs) reported in 2014, tremendous efforts have been made to promote the efficiencies of PeLEDs, including theoretical simulation, materials design, and device engineering. LÄS MER

  3. 7. Berättelser om mutor : Det korruptas betydelse bland svenska affärsmän i Öst- och Centraleuropa

    Författare :David Wästerfors; Sociologi; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; gift; blame; stories; narrative; rhetoric; symbolic interaction; interviews; businessmen; Eastern Europe; resentment; tactics; ethnography; courtships; identifications; accounts; defence speeches; Sociology; Social psychology; rumours; corruption; bribes; bribery; Criminology; Sociologi; Socialpsykologi; Kriminologi;

    Sammanfattning : What does it mean to bribe someone? What is the meaning of bribes? Questions like these have motivated this study. Its central argument is that the folk meanings of “bribes” and “corruption” depend on people’s symbolic demarcations and definitions. LÄS MER

  4. 8. Historia och nationalism : Sverigedemokraternas och Dansk Folkepartis historiska berättelser

    Författare :Julia Håkansson; Stefan Nyzell; Samuel Edqvist; Malmö universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; historical narratives; nationalism; narrative strategies; historical culture; key symbols; cultural heritage; the Sweden Democrats; the Danish People’s Party;

    Sammanfattning : This thesis studies the relationship between history and nationalism as expressed by the political parties the Sweden Democrats and the Danish People's Party. The study focuses on how the Sweden Democrats and the Danish People's Party convey historical narratives in their party magazines, SD-Kuriren and Dansk Folkeblad, respectively, and in central party documents. LÄS MER

  5. 9. Around minimal Hilbert series problems for graded algebras

    Författare :Lisa Nicklasson; Samuel Lundqvist; Christian Gottlieb; Uwe Nagel; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Graded algebras; Hilbert series; Lefschetz properties; Exterior algebra; Linear resolution; Mathematics; matematik;

    Sammanfattning : The Hilbert series of a graded algebra is an invariant that encodes the dimension of the algebra's graded compontents. It can be seen as a tool for measuring the size of a graded algebra. This gives rise to the idea of algebras with a "minimal Hilbert series", among the algebras within a certain family. LÄS MER