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Visar resultat 1 - 5 av 333 avhandlingar som matchar ovanstående sökkriterier.

  1. 1. Beam mode : Modelling optical systematics in the search for CMB B-mode polarisation

    Författare :Alexandre Adler; Jón E. Gudmundsson; Daniel Mortlock; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Sammanfattning : .... LÄS MER

  3. 2. Process integration issues for high-performance bipolar technology

    Författare :Tord E. Karlin; KTH; []
    Nyckelord :;

    Sammanfattning : The work in this thesis has been focused on processintegration issues for high-performance bipolar technologyincluding experimental work on self-aligned silicides,ion-implanted andin situdoped polysilicon emitters, strained silicongermanium for heterojunction bipolar transistors and physicalprocess and device simulation.Key issues for the self-aligned silicidation of small devicefeatures such as the influence of dopants, silicon morphologyand line width on titanium disilicide formation, phasetransformation and temperature stability, have been addressed. LÄS MER

  4. 3. From Particle-Production Cross Sections to KERMA and Absorbed Dose for the Case 96 MeV n-12C Interactions

    Författare :Bel E. Bergenwall; Ayşe Ataç; Eva Lund; Uppsala universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Nuclear physics; Fast neutrons; En = 96 MeV; charged-particle production; 12C n; px ; 12C n; dx ; 12C n; tx ; 12C n; 3Hex ; 12C n; ax reactions; cross sections; KERMA; microscopic measurements; absorbed dose; Kärnfysik; Nuclear physics; Kärnfysik;

    Sammanfattning : Neutron-carbon interactions have been studied with a focus on charged-particle production of relevance to radiation protection and medical applications, such as cancer therapy. The measurements have been performed using the particle-detection setup, MEDLEY, and the 96 MeV neutron beam at the The Svedberg Laboratory in Uppsala. LÄS MER

  5. 4. On the deformation behavior and cracking of ductile iron; effect of microstructure

    Författare :Keivan Amiri Kasvayee; Anders E.W. Jarfors; Jens Bergström; Jönköping University; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Spherical graphite iron; component casting; high silicon ductile iron; digital image correlation DIC ; in-situ tensile testing; in-situ cyclic testing; DIC pattern generation; pit etching; micro-scale deformation; micro-crack; finite element analysis FEA ; focused ion beam FIB milling; segjärn; komponentgjutning; högkisellegerat segjärn; digital image correlation DIC ; insitu dragprovning; in-situ cyklisk provning; DIC-mönstergenerering; grop-etsning; mikroskalig deformation; mikrosprickor; finite element analys FEA ; fokuserad jonstråle FIB avverkning;

    Sammanfattning : This thesis focuses on the effect of microstructural variation on the mechanical properties and deformation behavior of ductile iron. To research and determine these effects, two grades of ductile iron, (i) GJS-500-7 and (ii) high silicon GJS-500-14, were cast in a geometry containing several plates with different section thicknesses in order to produce microstructural variation. LÄS MER

  7. 5. Modelling optical systematics for current and next-generation CMB experiments : Facilitating the quest for primordial B-modes

    Författare :Konstantina Dachlythra; Jón E. Gudmundsson; Norman Jarosik; Stockholms universitet; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Physics; fysik;

    Sammanfattning : The polarization of the Cosmic Microwave Background (CMB) is at the centre of attention of the cosmological community, as the observable possibly offers a view of primordial gravitational waves. This effort faces two key challenges. LÄS MER