Sökning: "Daniel Ask"

Visar resultat 1 - 5 av 10 avhandlingar innehållade orden Daniel Ask.

  1. 1. Inversion and interpretation of hydraulic and overcoring stress measurements in the Äspö region, Sweden

    Författare :Daniel Ask; KTH; []
    Nyckelord :integrated stress analysis; least squares inversion; hydraulic fracturing; HTPF; overcoring; Äspö HRL;

    Sammanfattning : .... LÄS MER

  3. 2. New developments of the Integrated Stress Determination Method and application to the Äspö Hrad Rock Laboratory, Sweden

    Författare :Daniel Ask; KTH; []
    Nyckelord :Integration; Rock Stress; ISDM; Äspö HRL;

    Sammanfattning : This thesis presents new developments of the IntegratedStress Determination Method (ISDM) with application to the AspoHard Rock Laboratory (HRL), Oskarshamn, Sweden. The newdevelopments involve a 12-parameter representation of theregional stress field in the rock mass. LÄS MER

  4. 3. Invasion of top and intermediate consumers in a size structured fish community

    Författare :Per Ask; Lennart Persson; Daniel E Schindler; Umeå universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Invasion; intraguild predation; size-structure; cannibalism; climate; temperature; Arctic char; ninespine stickleback; Freshwater ecology; Limnisk ekologi; biology; biologi;

    Sammanfattning : In this thesis I have investigated the effects of invading top and intermediate consumers in a size-structured fish community, using a combination of field studies, a lake invasion experiment and smaller scale pond and aquaria experiments. The lake invasion experiment was based on introductions of an intermediate consumer, ninespine stickleback (Pungitius pungitius L. LÄS MER

  5. 4. Parameters optimization of oil well drilling operation

    Författare :Ali Darwesh; Thorkild Maack Rasmussen; Nadhir Al-Ansari; Daniel Ask; Bernt Sigve Aadnøy; Luleå tekniska universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Bazian Block; Kurdistan; Iraq; Optimization; Drilling Parameters; Rate of Penetration; Wiper trips; Kicks; Pay zone; Bourgoyne and Young model; Exploration Geophysics; Prospekteringsgeofysik;

    Sammanfattning : In the beginning of 2005, the ministry of natural resources in the Kurdistan region of Iraq dividedits territory into more than 50 oil blocks based on geological setting. These oil blocks were awardedlater to different international oil companies for oil investments based on Production SharingContracts (PSCs). LÄS MER

  7. 5. Computations in the Grothendieck Group of Stacks

    Författare :Daniel Bergh; Torsten Ekedahl; David Rydh; Jochen Heinloth; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; matematik;

    Sammanfattning : Given an algebraic group, one may consider the class of its classifying stackin the Grothendieck group of stacks. This is an invariant studied byEkedahl. For certain connected groups, called the special groups bySerre and Grothendieck, the invariant simply gives the inverse of the class ofthe group itself. LÄS MER