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Visar resultat 1 - 5 av 281 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Modelling and simulation of plastic deformation on small scales : interface conditions and size effects of thin films

    Författare :Per Fredriksson; Peter Gudmundson; Christian Niordson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Strain gradient plasticity; Size effects; Thin films; Interface; Finite element method; Dislocations; Constitutive behaviour; Hardening behaviour; Indentation; Contact mechanics; Metal matrix composites; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : Contrary to elastic deformation, plastic deformation of crystalline materials, such as metals, is size-dependent. Most commonly, this phenomenon is present but unnoticed, such as the effect of microstructural length scales. LÄS MER

  3. 2. Silicon device substrate and channel characteristics influenced by interface properties

    Författare :Mikael Johansson; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; channel; attenuation; zro2; interface; traps; semi-insulating; high-k; mos; cross-talk; hfo2;

    Sammanfattning : This thesis is divided in two parts, one dealing with the depleted Si/Si structure, which is a substrate behaving as a semi-insulating material intended for radio-frequency applications and the other concerning high-k gate dielectrics (dielectrics with high dielectric constant) as the replacement for silicon dioxide as MOS gate dielectric.High frequency applications of CMOS integrated circuits, to lower cost, achieve higher performance and richer functionality, depends partly on the possibility to decrease the substrate coupling between different parts of the circuit. LÄS MER

  4. 3. The marketing-entrepreneurship interface : an evaluation of hybrid entrepreneurs

    Författare :Caitlin Ferreira; Esmail Salehi-Sangari; Julie S. Tinson; Luleå tekniska universitet; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Entrepreneurial marketing; hybrid entrepreneurship; experiential learning theory; self-determination theory; venture development; motivations; strategic orientation; brand equity; growth strategy; comfort entrepreneur; Industrial Marketing; Industriell marknadsföring;

    Sammanfattning : Marketing and entrepreneurship may often be treated as distinct streams of academic research, however their complementary nature in practice highlights a number of areas of overlap between the two disciplines. The emergence and subsequent growth of entrepreneurial marketing has highlighted the intersection between marketing and entrepreneurship, with scholars expanding the context within which entrepreneurial marketing is examined. LÄS MER

  5. 4. Adding usability : Methods for modelling, user interface design and evaluation

    Författare :Magnus Lif; Uppsala universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Materials science; Modelling; analysis; design; evaluation; user interface; human computer interaction; system development; usability; utility; methods; workspace; iterative; designer; Materialvetenskap; Materials science; Teknisk materialvetenskap; datavetenskap med inriktning människa-datorinteraktion; Computer Science; human-computer interaction;

    Sammanfattning : Many system development projects fail to provide information systems with high usability. This thesis focuses on how to solve this problem by introducing methods for modelling, user interface design and evaluation. These methods are primarily designed to serve as complements to existing methods for systems development. LÄS MER

  7. 5. Solder Matrix Fiber Composite Thermal Interface Materials

    Författare :Josef Hansson; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; thermal management; composite materials; solder; thermal interface material;

    Sammanfattning : Overheating has been a problem for microelectronics devices for decades, and the problem is exacerbated by the continued trend of miniaturization of features and the corresponding increase in power density. Thermal interface materials (TIMs) target one of the main bottlenecks in heat transfer: the interface between two materials, such as between a heat-generating microchip and a heatsink. LÄS MER