Search for dissertations about: "criticality"

Showing result 1 - 5 of 86 swedish dissertations containing the word criticality.

  2. 1. Development of New Monte Carlo Methods in Reactor Physics : Criticality, Non-Linear Steady-State and Burnup Problems

    Author : Jan Dufek; Jan Wallenius; Waclaw Gudowski; Cheikh Diop; KTH; []
    Keywords : NATURAL SCIENCES; NATURVETENSKAP; NATURVETENSKAP; NATURAL SCIENCES; Monte Carlo; reactor physics; fission source; inactive cycles; convergence; burnup; steady-state; criticality; eigenvalue; Nuclear physics; Kärnfysik;

    Abstract : The Monte Carlo method is, practically, the only approach capable of giving detail insight into complex neutron transport problems. In reactor physics, the method has been used mainly for determining the keff in criticality calculations. READ MORE

  4. 2. A Transnational Study of Criticality in the History Learning Environment

    Author : Sergej Ivanov; Janet Enever; Rodney Jones; Umeå universitet; []
    Keywords : HUMANITIES; HUMANIORA; SOCIAL SCIENCES; SAMHÄLLSVETENSKAP; SAMHÄLLSVETENSKAP; HUMANIORA; SOCIAL SCIENCES; HUMANITIES; criticality; transnational; curriculum theory; policy; upper secondary; history; learning environment; comparative; language teaching and learning; språkdidaktik;

    Abstract : This study examines conceptions of criticality and its instruction in the History learning environ- ment in Sweden, Russia, and Australia as evidenced in one sample upper secondary class in each country. To achieve this, data were collected at macro, micro and meso levels. READ MORE

  5. 3. Towards Efficient Monte Carlo Calculations in Reactor Physics : Criticality, Kinetics and Burnup Problems

    Author : Ignas Mickus; Jan Dufek; Andrea Zoia; KTH; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Kärnenergiteknik; Nuclear Engineering;

    Abstract : This thesis presents a compilation of work focused on Monte Carlo crit-icality, kinetics and burnup calculations in reactor physics. Performing suchcalculations usually comes at a high computing cost. Therefore, the main mo-tivation behind the presented work is lowering the computing cost of MonteCarlo calculations. READ MORE

  6. 4. Development of a Methodology for Detecting Coolant Void in Lead-cooled Fast Reactors by Means of Neutron Measurements

    Author : Peter Wolniewicz; Håkansson Ane; Christian Jammes; Uppsala universitet; []
    Keywords : ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; LFR; fission chamber; nuclear; reactor; leak; criticality;

    Abstract : In a lead-cooled fast reactor (LFR), small bubbles (in the order of one mm or less) may enter the coolant from a leaking steam generator. If such a leakage is undetected the small bubbles may eventually coalesce into a larger bubble in local stagnation zones under the active core. READ MORE

  7. 5. Tangible participation - Engaging designs and design engagements in pedagogical praxes

    Author : Henrik Svarrer Larsen; Certec - Rehabiliteringsteknik och Design; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Aesthetics; annotated portfolios; Certec; corporeality; critical design; criticality; design; design artefacts; design hermeneutics; design qualities; design research; designerly; disability; embodiment; experiential qualities; extended materiality; hybrid media; ideation; intellectual disability; interaction design; interactivity; multisensory; multisensory environments; MSE; participation; participatory design; probes; programmatic design research; rehabilitation engineering; research by design; research through design; sensuousness; sketching; Snoezelen; tangible computing; tangibles.;

    Abstract : This dissertation contributes to three fields within design research: - Explorations of a design space related to aesthetics of Tangible Interaction, which have led to a set of design imaginations as well as perspectives on salient design qualities. - Views on and a designerly example of knowledge construction related to Research through Design as well as to programmatic approaches to design research. READ MORE