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Visar resultat 6 - 10 av 18 avhandlingar som matchar ovanstående sökkriterier.

  1. 6. Vision Beyond the Fovea: Evaluation and Stimuli Properties

    Författare :Abinaya Priya Venkataraman; Linda Lundström; Hema Radhakrishnan; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Peripheral vision; Visual optics; Optical correction; Orientation; Stimulus extent; Moving stimulus; Contrast sensitivity; Visual acuity; Central vision loss; Myopia; Biological Physics; Biologisk fysik;

    Sammanfattning : This research is about evaluating vision in the periphery. Peripheral vision is of fundamental importance in the performance of our everyday activities. The aim of this thesis is to develop methods suitable for the evaluation of peripheral vision and to assess how different visual functions vary across the visual field. LÄS MER

  3. 7. 3D X-ray microscopy: image formation, tomography and instrumentation

    Författare :Mårten Selin; Hans Hertz; Chris Jacobsen; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; X-ray microscopy; image formation theory; partial coherence in imaging; wave propagation; tomography; instrumentation; Fysik; Physics;

    Sammanfattning : Tomography in soft X-ray microscopy is an emerging technique for obtaining quantitative 3D structural information about cells. One of its strengths, compared with other techniques, is that it can image intact cells in their near-native state at a few 10 nm’s resolution, without staining. LÄS MER

  4. 8. Multidimensional Ultrasonic Standing Wave Manipulation in Microfluidic Chips

    Författare :Otto Manneberg; Hans M. Hertz; Martin Wiklund; Jürg Dual; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biological physics; Biologisk fysik;

    Sammanfattning : The use of ultrasonic standing waves for contactless manipulation of microparticles in microfluidic systems is a field with potential to become a new standard tool in lab-on-chip systems. Compared to other contactless manipulation methods ultrasonic standing wave manipulation shows promises of gentle cell handling, low cost, and precise temperature control. LÄS MER

  5. 9. Concepts and biomedical applications of excitation-modulated transient state monitoring of fluorescence emitters

    Författare :Baris Demirbay; Jerker Widengren; Yves Mely; KTH; []
    Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Biological and Biomedical Physics; Biologisk och biomedicinsk fysik;

    Sammanfattning : Fluorescence methods have developed very strongly in the last decade, allowing single- molecule detection sensitivity, high specificity, high time- and spatial resolution, as well as high readout speeds. Together, this makes fluorescencea very central readout modality for biomolecular and cellular studies. LÄS MER

  7. 10. Preclinical X-Ray Fluorescence Imaging with Multifunctional Nanoparticles

    Författare :Giovanni Marco Saladino; Hans Hertz; Muhammet Toprak; Stefan Andersson-Engels; KTH; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Biological and Biomedical Physics; Biologisk och biomedicinsk fysik;

    Sammanfattning : X-ray fluorescence imaging (XFI) is an emerging technique for preclinical studies, characterized by high resolution, specificity, and sensitivity. It relies on nanoparticles (NPs) as contrast agents, which must be constituted of specific elements that match the X-ray source energy for detection. LÄS MER