Sökning: "appearing"

Visar resultat 11 - 15 av 259 avhandlingar innehållade ordet appearing.

  1. 11. Multi-conductor transmission line model for electrified railways: A method for including responses of lumped devices

    Författare :Ziya Mazloom; Rajeev Thottappillil; Farhad Rachidi; KTH; []
    Nyckelord :;

    Sammanfattning : For studying the response to transients caused by lightning and other electromagnetic disturbance sources, electrified railway systems can be represented as a system of multiconductor transmission lines (MTL) above a finitely conducting ground. The conductors present in this system would be wires for traction power supply, auxiliary power, return conductors for traction current, the tracks, and finitely conducting ground. LÄS MER

  3. 12. Automorphic string amplitudes

    Författare :Henrik Gustafsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Eisenstein series; string theory; automorphic forms; U-duality; non-perturbative effects; Whittaker vectors; instantons;

    Sammanfattning : This thesis explores the non-perturbative properties of higher derivative interactions appearing in the low-energy expansion of four-graviton scattering amplitudes in toroidal compactifications of type IIB string theory. We summarise the arguments for finding such higher derivative corrections in terms of automorphic forms using U-duality, supersymmetry and string perturbation theory. LÄS MER

  4. 13. On estimates of constants for maximal functions

    Författare :Alexander Iakovlev; Jan-Ofov Strömberg; Tuomas Hytönen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; maximal function; harmonic analysis;

    Sammanfattning : In this work we will study Hardy-Littlewood maximal function and maximal operator, basing on both classical and most up to date works. In the first chapter we will give definitions for different types of those objects and consider some of their most important properties. LÄS MER

  5. 14. Stem cells in inflammation and regeneration : focusing on animal models of multiple sclerosis and spinal cord injury

    Författare :Sreenivasa Raghavan Sankavaram; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The main objective of regenerative medicine is to replace or restore injured cells and tissues in the body. Stem cells are identified playing a key role in the regeneration but action of inflammatory mediators in disease is not well understood. LÄS MER

  7. 15. Demokratins ansikte : en jämförande studie av demokratibilder i tyska och svenska samhällskunskapsböcker för gymnasiet

    Författare :Agneta Bronäs; Staffan Selander; Svein Lorentzen; Stockholms universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Images of democracy; Textbooks in Social Science; Dialogue and Monologue; Subject didactics; Ämnesdidaktik; pedagogik; Education;

    Sammanfattning : The aim of this dissertation is to compare German and Swedish textbooks in socialscience focused on how democracy takes form in the text. What kind ofrepresentations appears through texts and illustrations? What is said and how is itsaid? What is emphasized? What is excluded? How does the text present differentconcepts and relate them to democracy? The study also focuses on how knowledgeand learning is described and to whom the text is addressed. LÄS MER