Sökning: "sis"

Visar resultat 11 - 15 av 94 avhandlingar innehållade ordet sis.

  1. 11. Mm-wave Radio Astronomy Instrumentation for the Onsala Space Observatory and SEST

    Författare :Nicholas D. Whyborn; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; mm-wave receiver; phase retrieval holography; focal plane imaging array; radio astronomy instrumentation; SIS mixer;

    Sammanfattning : The thesis presents work done in developing instrumentation for mm- and submm-wave radio astronomy. The work described is in several fields. The greater part of the thesis is concerned with sensitive heterodyne receivers and in particular the cryogenically cooled mixers. In paper A the SEST telescope and its observing system are described. LÄS MER

  3. 12. Lumped arrays of Josephson junction oscillators

    Författare :Jonas Edstam; Chalmers tekniska högskola; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; lumped array; Josephson oscillator; subharmonic generation; tunnel junction; inductive shunt; local oscillator; Josephson junction; LC-resonance; submicron junction; sub-mm wave; Nb PbBi junction; SIS junction; window junction;

    Sammanfattning : .... LÄS MER

  4. 13. Salivary gland neoplasms : studies on the cytoskeleton, the secretory apparatus and the nuclear DNA content

    Författare :Hans Gustafsson; Umeå universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Salivary gland neoplasms; intermediate filaments; immuno- histochemistry; ultrastructure; DNA; development; histogenesis; progno¬sis;

    Sammanfattning : The heterogeneity of salivary gland neoplasms have made classification and prognostication of these tumours sometimes difficult, and the in­troduction of techniques, such as enzyme and carbohydrate histochemis­try and electron microscopy have only to a certain extent increased our knowledge in these respects. In the present study immunohistochemical methods have been used to identify intermediate filament proteins (IFP) in normal fetal and adult parotid glands, as well as in salivary neo­plasms. LÄS MER

  5. 14. Oral cancer with special reference to virus detection and quantitative gene expression

    Författare :Miranda Shojaeian Jalouli; Lars Sand; Jan Hirsch; Torbjörn Ramqvist; Uppsala universitet; []
    Nyckelord :HPV; EBV; HSV-1; Oral Squamous Cell Carcinoma; Leukoplakia; apopto-sis; cell cycle regulation; intermediate filament proteins.; Medicinsk genetik; Medical Genetics;

    Sammanfattning : Background. Head and neck cancers (HNC) are among the most common malignancies worldwide, and about 90–92% of oral neoplasias are oral squamous cell carcinomas (OSCC). Alcohol and tobacco consumption have been recognized as the main risk factors for OSCC development. LÄS MER

  7. 15. Development of components for mm-wave radio astronomy instrumentation / Vessen V. Vassilev

    Författare :Vessen Vassilev; Chalmers tekniska högskola; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; band-pass amplifier; mm-wave reciever; radio astronomy instrumentation; waveguide to microstrip transition; sideband separation reciever; SIS mixer; active equalizer;

    Sammanfattning : .... LÄS MER