Essays about: "resonance ring"

Showing result 1 - 5 of 9 essays containing the words resonance ring.

  1. 1. Designing k-Space Filters to Improve Spatiotemporal Resolution with Sector-Wise Golden Angle (SWIG)

    University essay from KTH/Medicinteknik och hälsosystem

    Author : Jonas Ström Seez; [2022]
    Keywords : Cardiovascular Magnetic Resonance Imaging CMR ; k-Space Filter; Sector Wise Golden-angle SWIG ; Kardiovaskulär Magnetisk Resonans Tomografi CMR ; k-rumsfilter; Sektorsvis Gyllene Vinkel SWIG ;

    Abstract : The aim of this thesis is to design and evaluate k-space weighting filters for simultaneously improving the spatial and temporal resolution of cardiovascular MRI, with the ultimate goal of improving the accuracy of quantitative flow measurements, which are important for diagnosis and follow-up of heart dysfunction. Two different k-space filters were implemented and evaluated retrospectively to already acquired data. READ MORE

  3. 2. Development Of Bio-Based Thermosetting Resins

    University essay from Högskolan i Borås/Akademin för textil, teknik och ekonomi

    Author : Snehaben Gaurangkumar Mistry; [2021]
    Keywords : Bio-based polymer; Resin; lactide; lactone; isosorbide; butanediol; polymerisation; characterisation; FTIR; NMR; TGA; DMA;

    Abstract : Thermoset polymers are widely used polymers in the world, but Increase in global plastic pollution and lack of fossil fuel stimulates intense research towards environmentally sustainable materials. Bio-based unsaturated polyesters (UPs) would be an excellent solution to replace oil-based synthetic polyesters. READ MORE

  4. 3. Microeletromechanical Systems for Tunable Ring Resonators on a Silicon Platform

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Chris Phong Van Nguyen; [2021]
    Keywords : Integrated photonics; Silicon Photonics; MEMS; Silicon Photonic MEMS; Ring Resonator; Telecommunications; Integrerad fotonik; Silicon Photonics; MEMS; Silicon Photonic MEMS; Ringresonator; Telekommunikation;

    Abstract : Advancements in photonic integrated circuits, so-called PICs, have progressed fast in the last decades. More complex PICs are getting developed, which are promising in possibly offering advantages like low power consumption and high-performance computing. Re-programmable photonic FPGAs are one of these candidates. READ MORE

  5. 4. Towards a tunable nanometer thick flat lens

    University essay from Uppsala universitet/Materialfysik

    Author : Hugo Laurell; Johan Hillborg; [2018]
    Keywords : Metamaterial; COMSOL; Fano resonances; Surface plasmon polariton; Localized surface plasmons; Nanophotonics;

    Abstract : This report examines the cross sections of silver microresonators subjected to an incident light with different polarization. The microresonators had different geometries with and without broken symmetries. READ MORE

  6. 5. Detecting Cardiac Pulsatility and Respiration using Multiband fMRI

    University essay from Umeå universitet/Institutionen för fysik

    Author : Joakim Jonsson; [2018]
    Keywords : fMRI; multiband; cardiac pulsation; respiration; correlation analysis; neuroimaging;

    Abstract : Purpose: Arterial stiffening poses an increased risk of cerebrovascular diseases, cognitive impairments, and even dementia as cardiac pulsations reach further into the brain causing white matter hyperintensities and microbleeds. Therefore it is of interest to obtain methods to estimate and map cardiac related pulsatility in the brain. READ MORE