Sökning: "V Q"

Visar resultat 1 - 5 av 85 avhandlingar innehållade orden V Q.

  1. 1. AlN Thin Film Electroacoustic Devices

    Detta är en avhandling från Uppsala : Acta Universitatis Upsaliensis

    Författare :Gonzalo Fuentes Iriarte; I.V. Katardjiev; G.F. Iriarte; [2003]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Electrical engineering; Elektroteknik; elektronik och fotonik; TECHNOLOGY Electrical engineering; electronics and photonics; TEKNIKVETENSKAP Elektroteknik; elektronik och fotonik; elektronik; Electronics;

    Sammanfattning : Recently, the enormous growth in personal communications systems (PCS), satellite communication and various other forms of wireless data communication has made analogue frequency control a key issue as the operation frequency increases to the low/medium GHz range. Surface acoustic wave (SAW) and bulk acoustic wave (BAW) electroacoustic devices are widely used today in a variety of applications both in consumer electronics as well as in specialized scientific and military equipment where frequency control is required. LÄS MER

  2. 2. Quantification of pulmonary scintigraphy

    Detta är en avhandling från Göteborg : Göteborgs Universitet

    Författare :Jiahua Xu; Göteborgs universitet.; Gothenburg University.; [2002]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Emphysema; Inhomogeneity; Perfusion; scintigraphy; SPECT; 99mTc-Technegas; Ventilation; V Q;

    Sammanfattning : Modern nuclear medicine techniques, such as SPECT (single photon emission computed tomography), enable quantification and localisation of lung function in small lung elements, but appropriate methods are not yet available. The aim of the present project was therefore to develop and evaluate methods for mapping lung function in planar scintigrams and in SPECT. LÄS MER

  3. 3. Single-crystal Mo/V superlattices : growth, structure, and hydrogen uptake

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Jens Birch; Jan-Erik Sundgren; Bruce M Clemens; [1994]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

    Sammanfattning : Fundamental studies concerning the growth, structural characterization and hydrogen uptake of single-crystal (00 l )-oriented Mo/V superlattices have been performed. The superlattices were grown by dual-target magnetron sputtering in pure Ar-atmosphere < 6·10-3 Torr on (001)-oriented MgO substrates. LÄS MER

  4. 4. Pulmonary ventilation and perfusion assessed by electrical impedance tomography - Experimental studies in pigs

    Detta är en avhandling från Linköping : Linköping University Electronic Press

    Författare :Anneli Fagerberg; Göteborgs universitet.; Gothenburg University.; [2009]
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; electrical impedance tomography; V Q matching; pig; endotoxinaemic ALI; ACE inhibitor;

    Sammanfattning : Pulmonary ventilation and perfusion and ventilation/perfusion (V/Q) matching determine gas exchange in every lung unit in the healthy state and in the pathologically altered lung. Mismatch of V and Q lead to hypoxaemia and hypercapnia and monitoring of V/Q relations are thus important in critical illness. LÄS MER

  5. 5. Topics in multifractal measures, nonparametrics and biostatistics

    Detta är en avhandling från Centre for Mathematical Sciences, Lund University

    Författare :Attila Frigyesi; [2004]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; confidence interval; mixed effects; Statistics; operations research; programming; actuarial mathematics; Statistik; operationsanalys; programmering; aktuariematematik; operational model of pharmacological agonism; concentration-response curves; dose-response curves; ventilation perfusion scintigraphy; V Q-scan; pulmonary embolism; automated method; box counting; correlation dimension; Hentschel-Procaccia dimension; Rényi dimension; generalized dimensions; fractal dimension estimation; dimension spectrum; multifractal measures; kernel density estimates; absolute continuity; singular distribution functions;

    Sammanfattning : This thesis consists of four papers. The first two papers, which comprise the main part of the thesis, deal with an unexpected connection between kernel density estimators and dimension spectra for multifractal measures. LÄS MER