Sökning: "ski base"

Hittade 5 avhandlingar innehållade orden ski base.

  1. 1. Interfacial kinetic ski friction

    Författare :Leonid Kuzmin; Mats Tinnsten; Jonas Danvid; Mikael Jonsson; Roland Larsson; Mittuniversitetet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; ski glide; ski base; ski wax; hydrophobicity; UHMWPE; PTFE; topography; Engineering mechanics; Teknisk mekanik;

    Sammanfattning : It is no doubt, that the ski glide over the snow is a very complicated object of research. However, ski glide is just a one area of many other areas of human knowledge. As a rule, the scientists and practitioners, who work in these areas, operate with some publicly expressed more or less solid hypotheses. LÄS MER

  3. 2. On the Multi-Scale Nature of Ski-Snow Friction : Field Testing, Characterisation and Modelling of Cross-Country Ski Performance

    Författare :Kalle Kalliorinne; Andreas Almqvist; Roland Larsson; Steph Forrester; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Cross-Country Skiing; Winter Sports; Winter Olympics; Multi-Scale; Sports Equipment; Contact Mechanics; Ski-Camber Profile; Ski-Base Texture; Ski; Snow; Friction; RTK-GNSS; Machine Elements; Maskinelement;

    Sammanfattning : The goal of most endurance sports is to get from point A to B in the shortest time possible. Throughout the course, athletes need to overcome the resistive forces that are present in their specific sport. LÄS MER

  4. 3. Historia från kursplan till klassrum : perspektiv på lärares historieundervisning från Lpo 94 till Lgr 11

    Författare :Jessica Jarhall; Thomas Småberg; Cecilia Axelsson Yngvéus; May-Brith Ohman Nielsen; Malmö universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; history education; history teachers; transformation; historical thinking; lower secondary school; curriculum; historieundervisning; historielärare; historiedidaktik; omformning; historisk kunskap; högstadiet; läroplan;

    Sammanfattning : The thesis examines how history teachers perceive history teaching in Swedish lower secondary schools during a time-period when two different curricula were in use: Lpo 94 and Lgr 11. The overall aim is to investigate how history can be expressed through teachers' transformation of the subject, from syllabus to classroom. LÄS MER

  5. 4. Use of thermosyphons in a subarctic climate

    Författare :Anna Forsström; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

    Sammanfattning : In frozen ground, climatic changes and thermal disturbance might cause thawing and degradation of ground previously frozen. Foundations built on frozen ground might be destroyed in a matter of a few seasons. These problems are mostly pronounced in permafrost regions, but also exist in regions with more moderate climates. LÄS MER

  7. 5. Properties of snow with applications related to climate change and skiing

    Författare :Nina Lintzén; Sven Knutsson; Lars-Erik Persson; Luleå tekniska universitet; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Soil Mechanics; Geoteknik;

    Sammanfattning : Snow has been a subject of research since the mid-20th century. Research on mechanical properties of snow started as an off-shoot of soil mechanics, where methods, tools and instruments used often are the same. However, during the last decades the winter business industry has been growing requiring a number of new fields of research. LÄS MER