Search for dissertations about: "the artificial"

Showing result 16 - 20 of 1300 swedish dissertations containing the words the artificial.

2. 16. Catalysts for Oxygen Production and Utilization : Closing the Oxygen Cycle: From Biomimetic Oxidation to Artificial Photosynthesis

   Author : Erik Karlsson; Jan-Erling Bäckvall; Björn Åkermark; Jerker Mårtensson; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; oxygen; catalytic oxidation; biomimetic oxidation; artificial photosynthesis; water oxidation; DFT calculations; Organic chemistry; Organisk kemi; organisk kemi; Organic Chemistry;

   Abstract : This thesis describes the development and study of catalysts for redox reactions, which either utilize oxygen or hydrogen peroxide for the purpose of selectively oxidizing organic substrates, or produce oxygen as the necessary byproduct in the production of hydrogen by artificial photosynthesis.The first chapter gives a general introduction about the use of environmentally friendly oxidants in the field of organic synthesis, and about the field of artificial photosynthesis. READ MORE

4. 17. Nanostructured Artificial Biointerfaces

   Author : Hossein Agheli; Chalmers tekniska högskola; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Colloidal Lithography; Electrostatic Self Assembly; Nanofabrication; Cell;

   Abstract : AbstractThe interactions occurring between biological systems and the surface of biomaterials hasbeen an area of strong research focus for a number of decades. There has been a realisation ofthe importance of macromolecular interactions and a consequent need to understandbiointerfacial events at the nanometer length-scale. READ MORE

5. 18. The puzzle of social activity : the significance of tools in cognition and cooperation

   Author : Tarja Susi; Tom Ziemke; Linköpings universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; cognition science; social interactions; subject-object relationship; human-computer; Cognitive science; Kognitionsvetenskap;

   Abstract : This dissertation addresses the role of tools in social interactions, or more precisely the significance of tools in cognition and cooperation, from a situated cognition perspective. While mainstream cognitive science focuses on the internal symbolic representations and computational thought processes inside the heads of individuals, situated cognition approaches instead emphasise the central role of the interaction between agents and their material and social environment. READ MORE

6. 19. Artificial neural networks : applications in morphometric and landscape features analysis

   Author : Amir Houshang Ehsani; Fredrich Quiel; Wolter Arnberg; KTH; []
   Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Environmental engineering; Miljöteknik;

   Abstract : In this thesis a semi-automatic method is developed to analyze morphometric features and landscape elements based on Self Organizing Map (SOM) as a unsupervised Artificial Neural Network algorithm. Analysis and parameterization of topography into simple and homogenous land elements (landform) can play an important role as basic information in planning processes and environmental modeling. READ MORE

7. 20. The role of the adventitia and perivascular tissue for the formation of intimal hyperplasia

   Author : Per Fogelstrand; Göteborgs universitet; []
   Keywords : Intimal hyperplasia; adventitia; perivascular tissue; smooth muscle cells; fibroblasts; balloon injury; vein graft; artificial graft;

   Abstract : Symptomatic atherosclerosis is commonly treated with balloon angioplasty or bypass surgery. About 30% of the interventions will re-narrow within a year due to restenosis and graft-stenosis. Thickening of the luminal layer, the intima, is an important component in these side-effects. READ MORE