Sökning: "Duplex"

Visar resultat 1 - 5 av 207 avhandlingar innehållade ordet Duplex.

  1. 1. The role of duplex scanning in the management of carotid artery disease

    Författare :Karl Logason; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; Duplex scanning; Doppler spectral analysis; duplex criteria; Doppler angle of insonation; carotid artery stenosis; carotid endarterectomy; spontaneous cervical artery dissection; Kirurgi; Surgery; Kirurgi; Surgery; kirurgi;

    Sammanfattning : Extracranial carotid artery disease, mainly due to atherosclerosis, is a common cause of stroke. The risk for future stroke can be reduced in selected patients by carotid endarterectomy (CEA). Duplex scanning has been increasingly used for diagnosis of carotid artery disease. LÄS MER

  3. 2. The impact of duplex scanning in the management of chronic lower limb arterial disease

    Författare :Annika Boström Ardin; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; Duplex; Ultrasound; lower extremity; arterial; chronic ishemia; selection; surgery; PTA; Kirurgi; Surgery; Kirurgi; Surgery; kirurgi;

    Sammanfattning : In patients with chronic lower extremity ischemia in which endovascular or surgical intervention is considered non-invasive evaluation by duplex scanning provides important anatomical and hemodynamic information. The aim of this thesis was to evaluate the impact of duplex scanning in the selection of various therapeutic alternatives in limbs with lower extremity arterial insufficiency. LÄS MER

  4. 3. Super duplex stainless steels : Microstructure and propertiesof physically simulated base and weld metal

    Författare :Vahid Hosseini; Leif Karlsson; Högskolan Väst; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Super duplex stainless steel; weld metal; physical simulation; phase balance; precipitation; secondary phases; corrosion; nitrogen loss; arc heat treatment; production technology; Production Technology; Produktionsteknik; Manufacturing and materials engineering; Produktions- och materialteknik;

    Sammanfattning : High-temperature processing and application of super duplex stainless steel(SDSS) are associated with the risk of changes in the ferrite/austenite balance and precipitation of secondary phases. This study was therefore aimed at improving knowledge about effects of thermal cycles on the microstructure and properties of SDSS base and weld metal. LÄS MER

  5. 4. Optimization and Fundamental Insights in Full-Duplex Cellular Networks

    Författare :Jose Mairton B. da Silva Jr.; Carlo Fischione; Gabor Fodor; Geoffrey Ye Li; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; NATURVETENSKAP; NATURAL SCIENCES; full-duplex; optimization; power control; assignment; beamforming; millimeter wave; self-interference; multi-antenna; Electrical Engineering; Elektro- och systemteknik;

    Sammanfattning : The next generations of cellular networks are expected to provide explosive data rate transmissions and very low latencies. To meet such demands, one of the promising wireless transmissions candidates is in-band full-duplex communications, which enable wireless devices to simultaneously transmit and receive on the same frequency channel. LÄS MER

  7. 5. Fracture toughness properties of duplex stainless steels

    Författare :Henrik Sieurin; Rolf Sandström; Jan-Olof Nilsson; KTH; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; duplex stainless steel; fracture toughness; austenite reformation; sigma phase; material optimisation; Materials science; Teknisk materialvetenskap;

    Sammanfattning : Good toughness properties in base and weld material enable the use of duplex stainless steels (DSS) in critical applications. DSS offer high strength compared to common austenitic stainless steels. LÄS MER