Sökning: "UHF"

Visar resultat 1 - 5 av 30 uppsatser innehållade ordet UHF.

  1. 1. Texture Analysis and Ultra high-frequency ultrasound in use for diagnosing Hirschsprung's disease

    Kandidat-uppsats, Lunds universitet/Avdelningen för Biomedicinsk teknik

    Författare :Sophia Klarén; Jonathan Jedhammar; [2023]
    Nyckelord :Hirschsprung s disease; Aganglionosis; UHF ultrasound; Texture analysis; Nakagami; Skewness; Kurtosis; Technology and Engineering;

    Sammanfattning : An investigation into the use of statistical texture analysis in combination with ultra high-frequency ultrasound for diagnosing Hirschsprung’s disease (HD); An illness that manifests itself through the absence of ganglia cells in lower parts of the intestine. Current diagnostic techniques carry a higher risk of long-term consequences in newborns and children which enables a new avenue of research into new methods. LÄS MER

  3. 2. Sustainable reduction of asbestos sample losses using Radio Frequency Identification and the 5S method

    Master-uppsats, KTH/Kemiteknik

    Författare :Elie Falcand; [2021]
    Nyckelord :asbestos; Radio Frequency Identification; 5S; traceability; loss reduction; asbest; radiofrekvensidentifikation; 5S; spårbarhet; förlustminskning;

    Sammanfattning : This study is a research around an issue encountered by MyEasyLab, a laboratory involved in asbestos testing for the French market. They are facing a problem of sample losses, which is hardly acceptable, especially when growing on a highly competitive and price driven market. LÄS MER

  4. 3. Measuring T1 using MP2RAGE in Human Brain at 7T – Effect of B1+ and Inversion Pulse Efficiency

    Master-uppsats, Lunds universitet/Sjukhusfysikerutbildningen

    Författare :Mustafa Kadhim; [2021]
    Nyckelord :Medicine and Health Sciences;

    Sammanfattning : Introduction: The MP2RAGE technique has become popular for structural MRI at ultra-high fields. The core idea behind MP2RAGE is to reduce the influence of flip angle inhomogeneity (B +), proton density and T2* by calculating the regularized signed ratio of two complex MP-RAGE images acquired at different inversion times (TI) within the cycle. LÄS MER

  5. 4. Wave Propagation Models in the Troposphere for Long-Range UHF/SHF Radio Connections

    Master-uppsats, Karlstads universitet

    Författare :Tim Lindquist; [2020]
    Nyckelord :;

    Sammanfattning : .... LÄS MER

  7. 5. Decrease radiated emission from high frequency links

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Författare :Anna Vestin; [2020]
    Nyckelord :EMC; Spacewire;

    Sammanfattning : There is a need for increasing speed on external links and harmonics are often seen and are a challenge to master. Especially for products within the space industry where the requirements are narrower due to the harsh environment it needs to withstand. LÄS MER