Sökning: "Paul Håkansson"

Visar resultat 1 - 5 av 6 avhandlingar innehållade orden Paul Håkansson.

  1. 1. Modeling of coupled thermoplasticity at finite strains

    Författare :Paul Håkansson; Hållfasthetslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mechanical engineering; hydraulics; vacuum technology; vibration and acoustic engineering; Maskinteknik; Heat generation; Phase transformation; Void growth; Thermoplasticity; hydraulik; vakuumteknik; vibrationer; akustik; Crystal plasticity; Finite element;

    Sammanfattning : In this thesis, models for simulation of inelastic phenomena, such as plastic anisotropy, texture evolution, void growth and phase transformation are presented. Special emphasized is put on the modeling of heat generation due to plastic work. All models are formulated within a thermodynamic framework that allows large deformations. LÄS MER

  3. 2. Simulation of heat generation in elasto-plastic materials

    Författare :Paul Håkansson; Hållfasthetslära; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Sammanfattning : The demand for improved models for simulation of mechanical problem is today very great, especially since today's computer capacity makes it possible to simulate large and complicated problems. In some applications, temperature effects and the heat generated from inelastic deformation can not be neglected in order to achieve a good accuracy of the simulation. LÄS MER

  4. 3. Design and Verification of Component Based Real-Time Systems

    Författare :John Håkansson; Paul Pettersson; Wang Yi; Johan Lilius; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Component Based Software; Real-Time Systems; Model Checking; Verification; Timed Automata; Embedded Systems; Computer science; Datavetenskap; Datavetenskap; Computer Science;

    Sammanfattning : The design of embedded real-time systems is becoming more and more challengingdue to the increasing complexity of new hardware platforms, requirements onnew system functionality, and economical constraints on system development.Component based design has been successful for the development of general-purposecomputer systems such as destop and e-business. LÄS MER

  5. 4. Towards a framework for analyzing IT strategy management in public sector : a case for IT organisations in the public sector

    Författare :Anayanci López Poveda; Paul Johannesson; Lazar Rusu; Anne Håkansson; KTH; []
    Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; IT strategy management; strategic management of IT; IT service management; public sector; small medium sized IT organizations.; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning : Small/medium sized public sector IT organisations combine several characteristics that difficult the effective use of an IT strategy. Research has reported small/medium sized organisations as using unstructured and informal IT management initiatives, which frequently leads to inexistent or incipient use of IT strategy. LÄS MER

  7. 5. Ontology Integration with Non-Violation Check and Context Extraction

    Författare :Dan Wu; Anne Håkansson; Carl-Gustaf Jansson; Paul Johannesson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ontology matching and integration; semantic and pragmatic matching; semantic techniques; context; ontology and rules; SRA - ICT; SRA - Informations- och kommunikationsteknik;

    Sammanfattning : Matching and integrating ontologies has been a desirable technique in areas such as data fusion, knowledge integration, the Semantic Web and the development of advanced services in distributed system. Unfortunately, the heterogeneities of ontologies cause big obstacles in the development of this technique. LÄS MER