Search for dissertations about: "hybrids"

Showing result 1 - 5 of 140 swedish dissertations containing the word hybrids.

  2. 1. Heterogeneous hybrids : Information Technology in Texts and Practices

    Author : Pirjo Elovaara; []
    Keywords : SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Information Technology; Feminist Technoscientific Studies; Actor-Network Theory; Librarians;

    Abstract : How could one understand and interpret the phenomenon of information technology, is the overall research question of this licentiate dissertation. The point of departure is the way some official texts in Sweden define the concept of information technology. It is possible to identify two dominating discourses; the technical and the social. READ MORE

  4. 2. Towards Ultimate Performance of THz Heterodyne Receivers: SIS Frequency Multiplier and Wideband Passive Components

    Author : Hawal Marouf Rashid; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; Wideband passive components; distributed SIS junction; Frequency multiplier; Frequency up-converter; Hybrids; distributed SIS frequency multiplier;

    Abstract : This thesis focuses on the development of advanced components for the future wideband side band separating and / or multipixel receivers for radio-astronomy with ultimate sensitivity.In this thesis, a novel frequency multiplier based on distributed superconducting tunnel (SIS) junctions has been demonstrated for the first time, taking advantage of the extreme inherent nonlinearity of such device. READ MORE

  5. 3. Prestressed hybrids of AAC and HPC : The BCE (Block Composed Element) building system. A conceptual study

    Author : Hamid Bagheri; Bo Göran Hellers; Jonas Holmgren; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Architecture and architectural conservation and restoration; Arkitektur och bebyggelsevård;

    Abstract : There is an important potential for a development of a building system, if the present AACblock plants are completed with high performance concrete and pre-stressing technique. This can be done as a continuation of a present AAC production or in a site factory. Hybrid cooperation between AAC and concrete is not a new technology. READ MORE

  6. 4. Study of GaN Based Nanostructures and Hybrids

    Author : Mathias Forsberg; Galia Pozina; Ching-Lien Hsiao; Kevin P. O'Donnell; Linköpings universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Sputtering; Forster; Semiconductor; Nitride; GaN; Hybrid; Nanorods; Nanostructure; Thin film; Förstoffning; Sputtring; Förster; Halvledare; Nitrid; GaN; Hybrider; Nanostavar; Nanostrukturer; tunnfilmer;

    Abstract : GaN and its alloys with Al and In belong to the group III nitride semiconductors and are today the materials of choice for efficient white light emitting diodes (LEDs) enabling energy saving solid state lighting. Currently, there is a great interest in the development of novel inexpensive techniques to fabricate hybrid LEDs combining high quality III-N quantum well (QW) structures with inexpensive colloidal nanoparticles or conjugated polymers. READ MORE

  7. 5. Hopeful monsters: The role of hybrids in adaptation : The impact of hybridisation and genetic diversity on adaptation to stressful and novel environments

    Author : Ciaran Gilchrist; Rike Stelkens; Christopher Wheat; Linda Laikre; Mathilde Cordellier; Stockholms universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Experimental evolution; Saccharomyces cerevisiae; population genetics; hybridisation; adaptation; aneuploidy; comparative genomics; evolve-and-resequence; de novo mutations; evolutionary parallelism; populationsgenetik; Population Genetics;

    Abstract : Adaptation to novel environments can only occur if natural selection has the raw material to act upon. But small, endangered populations are often genetically depleted, and the acquisition of beneficial de novo mutations often takes too long when population face quick and extreme environmental change. READ MORE