Sökning: "Roger Olsson"

Visar resultat 1 - 5 av 15 avhandlingar innehållade orden Roger Olsson.

  1. 1. Lewis acid promoted endocyclic cleavage of glycosides and related acetals

    Författare :Roger Olsson; Centrum för analys och syntes; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; halichomycin; allylation; carbene; hydrogen bond; organozinc; organotitanium; furanosides; organoaluminium; pyranosides; glycosides; stereoselective; endocyclic cleavage; nucleophilic ring opening; ab initio; Organic chemistry; Organisk kemi;

    Sammanfattning : This thesis is a summary of five papers concerning endocyclic cleavage of glycosides and related acetals. Simple lactol ethers undergo endocyclic cleavage to give acyclic chain extended products on treatment with organoaluminium and organotitanium reagents. LÄS MER

  3. 2. Mechanical and Hydromechanical Behaviour of Hard Rock Joints. A laboratory study

    Författare :Roger Olsson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; laboratory shear tests; constant normal stiffness; rock mechanics; hydromechanical behaivour; rock joints; replicas;

    Sammanfattning : As a consequence of rock engineering works, the rock mass will deform due to stress changes. Most deformation occurs in the rock joints, in form of normal and shear strains. These deformations will also change the void geometry and thereby the joint aperture and fluid flow. LÄS MER

  4. 3. Samhällskunskap som ämnesförståelse och undervisningsämne : Prioriteringar och nyhetsanvändning hos fyra gymnasielärare

    Författare :Roger Olsson; Héctor Pérez Prieto; Kenneth Nordgren; Svein Lorentzen; Karlstads universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; teacher thinking; social studies; subject conceptions; teaching; internal and external goals; ämnesdidaktik; samhällskunskapslärare; ämnesförståelse; undervisningsämne; nyhetsanvändning; interna och externa mål; Pedagogiskt arbete; Educational Work;

    Sammanfattning : This thesis seeks to contribute knowledge to how professional teachers in social studies express their subject conception, and its relation to the subject manifested in teaching. The data consists of 48 hours of observed teaching and interviews. LÄS MER

  5. 4. Synthesis, Coding, and Evaluation of 3D Images Based on Integral Imaging

    Författare :Roger Olsson; Youzhi Xu; Mårten Sjöström; Tingting Zhang; Aljoscha Smolic; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Integral Imaging; 3D images; coding; quality evaluation; H.264 AVC; JP3D; Telecommunication; Telekommunikation;

    Sammanfattning : In recent years camera prototypes based on Integral Imaging (II) have emerged that are capable of capturing three-dimensional (3D) images. When being viewed on a 3D display, these II-pictures convey depth and content that realistically change perspective as the viewer changes the viewing position. LÄS MER

  7. 5. High Efficiency Light Field Image Compression : Hierarchical Bit Allocation and Shearlet-based View Interpolation

    Författare :Waqas Ahmad; Mårten Sjöström; Roger Olsson; Peter Schelkens; Mittuniversitetet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Over the years, the pursuit of capturing the precise visual information of a scenehas resulted in various enhancements in digital camera technology, such as highdynamic range, extended depth of field, and high resolution. However, traditionaldigital cameras only capture the spatial information of the scene and cannot pro-vide an immersive presentation of it. LÄS MER