Sökning: "laser doppler"

Visar resultat 1 - 5 av 18 uppsatser innehållade orden laser doppler.

  1. 1. Detecting Pollutants Using Vibrations : Laser Doppler Vibrometry as a Non-Invasive Soil Organism Health Monitoring Method

    Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskap

    Författare :Kristoffer Wilson; [2023]
    Nyckelord :Vibrometer; Biotremology; Imidacloprid; Ants;

    Sammanfattning : Due to a lack of in-situ methods capable of detecting sub-lethal effects of pollutants on soil organisms, many polluted environments are not identified prior to pollution-induced changes in the soil fauna. Therefore, there is a need to develop new non-invasive methods to measure the health of soil organisms. LÄS MER

  3. 2. Laser cooling, state initialization and laser manipulation of a trapped ion

    Kandidat-uppsats, Stockholms universitet/Fysikum

    Författare :Julius Andersson; [2021]
    Nyckelord :Ion trap; Quantum computer;

    Sammanfattning : One way of realizing a quantum computer is to use an ion trap. The research group Trapped Ion Quantum Technologies at Stockholm university were operating an ion trap with strontium ions. To increase the coherence time they installed a magnetic field shielding. Therefore the experimental setup had to be partially rebuilt. LÄS MER

  4. 3. Data representation for fluorescence guided stereotactic brain tumor biopsies : Development and evaluation of a visual and auditory user interface

    Kandidat-uppsats, Linköpings universitet/Institutionen för medicinsk teknik; Linköpings universitet/Tekniska fakulteten

    Författare :Michaela Maintz; [2018]
    Nyckelord :Fluorescence spectroscopy; stereotactic brain tumor biopsies; intraoperative monitoring; user interface; auditory and visual data representation;

    Sammanfattning : Background and Objective In stereotactic brain tumor biopsies, the combination of real-time fluorescence spectroscopy with the detection of microvascular perfusion using laser Doppler flowmetry provides an improved localization of the brain tumor while decreasing the risk of intra-cranial hemorrhage. The surgeon using the measurement probe is required to view signal values on a screen or usually, when her or his visual focus is directed at the patient, the verbal feedback of a biomedical engineer who is monitoring the measurement signals is needed. LÄS MER

  5. 4. Beamforming in LTE FDD for Multiple Antenna Systems

    Master-uppsats, Lunds universitet/Institutionen för elektro- och informationsteknik

    Författare :Atef Hatahet; Ankit Jain; [2018]
    Nyckelord :Beamforming; FDD; MIMO; LTE; AOA; Technology and Engineering;

    Sammanfattning : High data rate is still the most crucial factor in cellular systems, and with 5g approaching new techniques are studied to achieve higher bit rates. Using MIMO technology, the spatial domain was exploited through beamforming and multiplexing multiple users’ data together assured more spectrum efficiency which resulted in higher bit rates. LÄS MER

  7. 5. System and database design for a research application to diagnostic laser-doppler instruments

    Kandidat-uppsats, Uppsala universitet/Institutionen för informationsteknologi

    Författare :Johan Lejdung; [2017]
    Nyckelord :;

    Sammanfattning : Perimed AB is interested in developing a new generation research platform, for thei rmost recent medical instrument, PF 6000. With thedevelopment of this platform, they are looking for innovative and practical ways to meet the requirements from the medical research community. LÄS MER