Sökning: "Theoretical frameworks"

Visar resultat 1 - 5 av 216 avhandlingar innehållade orden Theoretical frameworks.

  1. 1. Theoretical Studies of Natural Gas Hydrates and H-bonded Clusters and Crystals

    Författare :Yuan Liu; Lars Ojamäe; Per-Olov Käll; Ben Slater; Linköpings universitet; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES;

    Sammanfattning : In this thesis H-bonded systems (natural gas hydrates, water clusters, and crystal ice) are studied by density functional theory (DFT) computations.Natural gas hydrates (NGHs) play an important role in energy and environmental fields: NGHs are considered as a promising backup energy resource in the near-future due to their tremendous carbon content; improper exploration of NGHs could induce geological disasters and aggravate the greenhouse effect. LÄS MER

  2. 2. Approaching Mathematical Discourse : Two analytical frameworks and their relation to problem solving interactions

    Författare :Andreas Ryve; Kimmo Eriksson; Inger Wistedt; Anna Sfard; Mälardalens högskola; []
    Nyckelord :NATURAL SCIENCES; NATURVETENSKAP; Didactics of Mathematics; Mathematics Education; Analytical approaches; Communication; Concept maps; Contextualization; Discourse; Engineering students; Higher Education; Intentional analysis; Methodological framworks; Problem solving; Prospective teachers; Student teachers; Teacher education; Theoretical frameworks; MATHEMATICS; MATEMATIK; Matematik tillämpad matematik;

    Sammanfattning : The driving force of conducting the two studies presented in this thesis is to examine ways that conceptual understanding and problem solving could be part of mathematics teaching, and through that, part of students' mathematical knowledge. The specific aims of the thesis are: 1) to characterize the classroom discourse of two, apparently similar, problem solving courses in teacher education and 2) to discuss the possibilities of developing two analytical approaches - the communicational approach to cognition and the dialogical approach - used for studying mathematical discourse. LÄS MER

  3. 3. Theoretical disputes and practical environmental dilemmas : an interdisciplinary study

    Författare :Michelle Benyamine; Per Sandén; Rolf Lidskog; Ola Engelmark; Örebro universitet; []
    Nyckelord :sustainable development; natural science; theoretical disputes; forest nitrogen fertilisation; constructed wetlands; content analysis; NATURAL SCIENCES; NATURVETENSKAP; Enviromental Science; Miljövetenskap;

    Sammanfattning : The aim of this thesis is to analyse the scientific basis for diverging recommendations in environmental management. A further aim of this study is to discuss the links and interactions between disciplines related to science of environmental issues, and between natural science and practice in dealing with environmental management and ecological sustainability. LÄS MER

  4. 4. Exciton-plasmon interactions in metal-semiconductor nanostructures

    Författare :Staffan Hellström; Ying Fu; Mikael Käll; KTH; []
    Nyckelord :ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; plasmons; excitons; quantum dots; nanoparticles; FDTD; surface plasmon polaritons; QDIP; quantum dot infrared photodetector; polaritons;

    Sammanfattning : Semiconductor quantum dots and metal nanoparticles feature very strong light-matter interactions, which has led to their use in many photonic applications such as photodetectors, biosensors, components for telecommunications etc.Under illumination both structures exhibit collective electron-photon resonances, described in the frameworks of quasiparticles as exciton-polaritons for semiconductors and surface plasmon-polaritons for metals. LÄS MER

  5. 5. Knowledge Closure and Knowledge Openness : A Study of Epistemic Closure Principles

    Författare :Levi Spectre; Peter Pagin; Åsa Wikforss; Stewart Cohen; Stockholms universitet; []
    Nyckelord :HUMANITIES; HUMANIORA; HUMANIORA; HUMANITIES; knowledge; principle of epistemic closure; knowledge openness; evidence; epistemic principles; skepticism; fallibilism; principles of evidence; evidence openness; dogmatism; safety; chance; Bayesianism; Carnap; Cohen; Dretske; Hawthorne; Hempel; Kripke; Nozick; Pagin; Vogel; Williamson; Theoretical philosophy; Teoretisk filosofi; Theoretical Philosophy; teoretisk filosofi;

    Sammanfattning : The principle of epistemic closure is the claim that what is known to follow from knowledge is known to be true. This intuitively plausible idea is endorsed by a vast majority of knowledge theorists. There are significant problems, however, that have to be addressed if epistemic closure – closed knowledge – is endorsed. LÄS MER