Sökning: "Lars Malmgren"

Hittade 3 avhandlingar innehållade orden Lars Malmgren.

  1. 1. Interaction between shotcrete and rock experimental and numerical study

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Lars Malmgren; [2005]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Sammanfattning : At LKAB’s underground mines in Malmberget and Kiruna in northern Sweden shotcrete and rock bolts are the main rock support elements. A safe working environment for the miners and high accessibility to the mine are important issues. LÄS MER

  2. 2. Radio Frequency Systems for NMR Imaging: Coil Development and Studies of Non-Thermal Biological Effects

    Detta är en avhandling från Department of Electroscience, Lund University

    Författare :Lars Malmgren; Lunds universitet.; Lund University.; [1998]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; anechoic chamber; TEM transmission cells; FDTD; circularly polarized electromagnetic fields; reduced coupling; noise matching; matching networks; low noise amplifiers; upper thoracic spine; surface coils; Nuclear magnetic resonance; magnetic resonance imaging; non-thermal biological effects; blood-brain barrier; Electronics; Elektronik;

    Sammanfattning : This thesis concerns both design and optimization of NMR imaging systems and studies on non-thermal biological effects of electromagnetic fields. These two research fields are linked together by the fact that humans are subject to static and pulsed magnetic fields as well as to magnetic radio frequency fields (RF) during an NMR imaging investigation. LÄS MER

  3. 3. Shotcrete rock support exposed to varying load conditions

    Detta är en avhandling från Luleå : Luleå tekniska universitet

    Författare :Lars Malmgren; [2001]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Mining and Rock Engineering; Gruv- och Berganläggningsteknik;

    Sammanfattning : Field and laboratory tests and analyses This Licentiate thesis deals with the function of shotcrete as rock support. An extensive failure mapping of shotcrete in the Kiirunavaara mine has been conducted to improve the understanding of the performance of shotcrete. LÄS MER