Sökning: "contrast"

Visar resultat 1 - 5 av 4015 avhandlingar innehållade ordet contrast.

  1. 1. The acquisition of contrast a longitudinal investigation of initial s+plosive cluster development in Swedish children

    Detta är en avhandling från Umeå : Filosofi och lingvistik

    Författare :Fredrik Karlsson; Kirk P. H. Sullivan; Peter E. Czigler; Marilyn M. Vihman; [2006]
    Nyckelord :HUMANIORA; HUMANITIES; phonological contrast; speech development; place and manner of articulation; aspiration; structural complexity; acoustic cues; homonym production; HUMANITIES and RELIGION Languages and linguistics Linguistic subjects Phonetics; HUMANIORA och RELIGIONSVETENSKAP Språkvetenskap Lingvistikämnen Fonetik;

    Sammanfattning : This Thesis explores the development of word-initial s+plosive consonant clusters in the speech of Swedish children between the ages of 1;6 and 4;6. Development in the word-initial consonant clusters is viewed as being determined by 1) the children’s ability to articulate the target sequence of consonants, 2) the level of understanding of which acoustic features in the adult model production are significant for the signalling of the intended distinction, and 3) the children’s ability to apply established production patterns only to productions where the acquired feature agrees with the adult target, to achieve a contrast between rival output forms. LÄS MER

  2. 2. The Visible and the Invisible : Color Contrast Phenomena in Space

    Detta är en avhandling från Stockholm : KTH

    Författare :Gertrud Olsson; Jadwiga Krupinska; Henrik Oxvig; [2009]
    Nyckelord :HUMANIORA; HUMANITIES; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; color in architecture; color theory; color phenomena; simultaneous contrast; simultané; afterimage; transparency; material and immaterial; color mixture; light-colors; HUMANITIES and RELIGION Aesthetic subjects Art; HUMANIORA och RELIGIONSVETENSKAP Estetiska ämnen Konstvetenskap; TECHNOLOGY Civil engineering and architecture Architecture and architectural conservation and restoration Architecture; TEKNIKVETENSKAP Samhällsbyggnadsteknik och arkitektur Arkitektur och bebyggelsevård Arkitektur;

    Sammanfattning : This study deals with the changes in color that arise in space, primarily simultaneous contrast in three dimensions. The typical account of simultaneous contrast is that the contrast phenomenon occurs between two or more color surfaces seen together, thus affecting one another. LÄS MER

  3. 3. Polymer-shelled Ultrasound Contrast Agents : Characterization and Application

    Detta är en avhandling från Stockholm : KTH

    Författare :Dmitry Grishenkov; Leif Kari; Lars-Åke Brodin; Michel Versluis; []
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; ultrasound; contrast agents; microbubbles; polymer; perfusion; TECHNOLOGY Engineering physics Acoustics; TEKNIKVETENSKAP Teknisk fysik Akustik; TECHNOLOGY Engineering physics Material physics with surface physics; TEKNIKVETENSKAP Teknisk fysik Materialfysik med ytfysik; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Internal medicine Cardiovascular medicine; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Invärtesmedicin Kardiovaskulär medicin; MEDICINE Dermatology and venerology; clinical genetics; internal medicine Internal medicine Cardiology; MEDICIN Dermatologi och venerologi; klinisk genetik; invärtesmedicin Invärtesmedicin Kardiologi;

    Sammanfattning : Ultrasound-based imaging technique is probably the most used approach for rapid investigationand monitoring of anatomical and physiological conditions of internal organs and tissues.Ultrasound-based techniques do not require the use of ionizing radiation making the tests anexceptionally safe and painless. LÄS MER

  4. 4. Toward increased applicability of ultrasound contrast agents

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :Malin Larsson; Lars-Åke Brodin; Anna Bjällmark; Kenneth Caidahl; Jan Engvall; [2015]
    Nyckelord :TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Contrast agent; Contrast-to-tissue-ratio; Echocardiography; Endocardial border; Microbubbles; Multimodal; Phantom; Polymer; Ultrasound; Wall motion score index.; Teknik och hälsa; Technology and Health;

    Sammanfattning : Ultrasound is one of the most widely used modalities in medical imaging because of its high cost-effectiveness, wide availability in hospitals, generation of real-time images, and use of nonionizing radiation. However, the image quality can be insufficient in some patients. LÄS MER

  5. 5. High-resolution biomedical phase-contrast tomography

    Detta är en avhandling från Stockholm : KTH Royal Institute of Technology

    Författare :William Twengström; Hans Hertz; Anna Burvall; Marco Stampanoni; [2018]
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; x-ray; x-ray imaging; biomedical; phase contrast; tomography; zebrafish; coronary artery; virtual histology; ring artifacts; phase retrieval; mummy; Physics; Fysik;

    Sammanfattning : Improved three-dimensional biomedical imaging can give a better understanding of tissue structure, growth and diseases. Most present imaging techniques that provide cellular spatial resolution are based on visible or infrared light. These methods cannot image deeper than a millimeter into tissue. LÄS MER