Sökning: "Contact Zone"

Visar resultat 21 - 25 av 103 avhandlingar innehållade orden Contact Zone.

  1. 21. Wheel-rail Interaction Analysis

    Författare :Tanel Telliskivi; KTH; []
    Nyckelord :Archard; rolling-sliding; Winkler; wear simulation;

    Sammanfattning : A general approach to numerically simulating wear in rollingand sliding contacts is presented in this thesis. A simulationscheme is developed that calculates the wear at a detailedlevel. LÄS MER

  3. 22. Phylogeography of the Adder, Vipera berus

    Författare :Martin Carlsson; Håkan Tegelström; Michael Douglas; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Genetics; Phylogeography; Vipera; adders; mtDNA; microsatellites; RAPDs; Genetik; Clinical genetics; Klinisk genetik; Genetics; genetik;

    Sammanfattning : The phylogeography of a wide ranging temperate species, the adder, Vipera berus, was investigated using several genetic tools, with special emphasis on the post-glacial colonisation pattern of Fennoscandia. The area was colonised from two directions by adder populations representing different glacial refugia. LÄS MER

  4. 23. Characterization of WC-Co tools used for machining of Alloy 718 under the influence of high-pressure coolant supply

    Författare :Philipp Hoier; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; erosion; surface-modifications; High-pressure coolant supply; Alloy 718; tool wear; vapor-barrier;

    Sammanfattning : The use of high-pressure jets for supply of coolant to the cutting zone has the potential to significantly increase the productivity and process stability when machining difficult-to-cut materials such as Ni-based superalloys. Apart from better chip-breakability, the jets enable the coolant to reach closer to the cutting edge and hence enhance its capability to dissipate heat. LÄS MER

  5. 24. Infrafaces: Essays on the Artistic Interaction

    Författare :Marco Muñoz; Göteborgs universitet; []
    Nyckelord :HUMANIORA; HUMANITIES; interaction; artistic research; digital art; infrafaces; interface; paradoxes; art and technology;

    Sammanfattning : The essays collected in this dissertation introduce a new concept in the field of interactive art: the concept of infrafaces. This thesis shows how a new zone is discovered when two or more elements connect. LÄS MER

  7. 25. Population divergence at different spatial scales in a wide-spread amphibian

    Författare :Patrik Rödin Mörch; Anssi Laurila; Jacob Höglund; Bengt Hansson; Uppsala universitet; []
    Nyckelord :Adaptive divergence; environmental gradients; genomics; life-history; amphibians; Biologi med inriktning mot zooekologi; Biology with specialization in Animal Ecology;

    Sammanfattning : To study the distribution of genetic and phenotypic variation in different environments and at different spatial scales is important in order to understand the process of local adaptation and how populations will respond to future climate change. In my thesis I study populations of moor frogs (Rana arvalis) at different spatial scales, first along a 1700 km latitudinal gradient (Paper I, II, IV) and, second, in a system of inter-connected wetlands (III, IV). LÄS MER