Search for dissertations about: "Henrik Gustafsson"

Showing result 1 - 5 of 13 swedish dissertations containing the words Henrik Gustafsson.

  1. 1. Opioid-induced cholecystokinin release in the CNS-neurochemical mechanisms and effects of sciatic nerve lesion

    Author : Henrik Gustafsson; Karolinska Institutet; Karolinska Institutet; []
    Keywords : ;

    Abstract : Cholecystokinin (CCK) and opioid peptides have a similar distribution in the nervous system and CCK has been demonstrated to counteract opioid-induced analgesia at spinal and supraspinal level. An increased spinal release of CCK has been suggested to be a mechanism for the relative resistance to opioid analgesic drug in certain pain conditions following nerve lesions (i. READ MORE

  2. 2. Automorphic string amplitudes

    Author : Henrik Gustafsson; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Eisenstein series; string theory; automorphic forms; U-duality; non-perturbative effects; Whittaker vectors; instantons;

    Abstract : 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. READ MORE

  3. 3. Degenerate Geometries, Supersymmetry and Duality

    Author : Henrik Gustafsson; Marcus Grisary; Stockholms universitet; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; Physics; fysik;

    Abstract : String theory is a theory attempting to unify gravity with the electro-weak and strong interactions so successfully described by Quantum Field Theory. The implications of String Theory is not fully understood since it is still not a complete theory. READ MORE

  4. 4. Out of Site : Landscape and Cultural Reflexivity in New Hollywood Cinema 1969-1974

    Author : Henrik Gustafsson; Astrid Söderbergh Widding; Asbjørn Grønstad; Stockholms universitet; []
    Keywords : HUMANITIES; HUMANIORA; HUMANIORA; HUMANITIES; cultural identity; film analysis; film and nation; genre revisionism; intermediality; landscape in art; landscape in cinema; New Hollywood; new realism; nostalgia film; reflexivity; road movies; Film; Filmvetenskap; Cinema Studies; filmvetenskap;

    Abstract : This dissertation examines landscape as a concept for analysis and interpretation in film studies by considering the New Hollywood cinema in the late 1960s and early 1970s. Contextualized within the contested notion of nationhood at the time as well as the concern among filmmakers to probe the properties, practices and traditions of American cinema, this was also a period when landscape underwent widespread redefinition as a field of artistic and academic practice. READ MORE

  5. 5. Automorphic forms and string theory: Small automorphic representations and non-perturbative effects

    Author : Henrik Gustafsson; Chalmers University of Technology; []
    Keywords : NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; NATURAL SCIENCES; instantons; automorphic forms; automorphic representations; Eisenstein series; U-duality; non-perturbative effects; string theory;

    Abstract : This compilation thesis stems from a project with the purpose of determining non-perturbative contributions to scattering amplitudes in string theory carrying important information about instantons, black hole quantum states and M-theory. The scattering amplitudes are functions on the moduli space invariant under the discrete U-duality group and this invariance is one of the defining properties of an automorphic form. READ MORE