Sökning: "step-down"

Visar resultat 6 - 10 av 25 uppsatser innehållade ordet step-down.

  1. 6. Stepdown-omvandlare med låg tomgångsförlust

    Kandidat-uppsats, Linköpings universitet/Elektroniska Kretsar och System

    Författare :David Smedberg; [2020]
    Nyckelord :;

    Sammanfattning : A power supply unit with very low standby losses has been constructed. A reference design from Texas Instrument was used as a comparison and starting point. A choice between optimizing the existing reference design or creating a new power supply was made. The losses in the reference design was located to be due to high switching frequency. LÄS MER

  3. 7. Stepping Down Fatigued or Not: What Makes Flight Crews Decide to Step Down From Duty.

    Magister-uppsats, Lunds universitet/Avdelningen för Riskhantering och Samhällssäkerhet

    Författare :Vincent Steinmetz; [2020]
    Nyckelord :Fatigue; Variability; Aviation; FRMS; Fatigue Risk Management; Flightcrew; Decision making; NDM; RPD; Complexity; FLMU06; Social Sciences;

    Sammanfattning : With the emergence of industrialisation, the work-life balance has become a point of discussion in many industries, among which the aviation industry. Distortions in the work-life balance became especially apparent when 24/7 economies evolved, and industries made a transition to facilitate and serve these economies. LÄS MER

  4. 8. Jämförelse av Egypten och Saudiarabien under den arabiska våren

    Kandidat-uppsats, Uppsala universitet/Statsvetenskapliga institutionen

    Författare :Lennar Gaynullin; [2020]
    Nyckelord :Mellanöstern; Egypten; Saudiarabien; militären; polis; rebeller; revolution.;

    Sammanfattning : This paper will introduce the explanatory factors that led to loyalty or disobedience of the military forces to the regimes in the Arab countries during the revolutionary wave in the Middle East 2011. There are few who noticed that the revolutions and uprisings that took place in the Middle East during the Arab Spring 2011 differed from the earlier one's by one important factor: That the revolutions took place in heavily military-based regimes. LÄS MER

  5. 9. Design and construction of a bidirectional DC/DC converter

    Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Elektricitetslära

    Författare :Alexander Wallberg; [2019]
    Nyckelord :Converter; DCDC; Energy storage; Single-phase; Omvandlare; DCDC; Energilager; Single-phase;

    Sammanfattning : A four quadrant general single-phase bi-directional DC/DC converter was designed and constructed for high effect systems. The target application for the DC/DC converter was to be used to transfer energy between different energy storages, a miniature DC power grid and the high voltage AC power city grid. LÄS MER

  7. 10. Toward Non-invasive Neonatal Gas Monitoring with Plasma-based Spectroscopy

    Kandidat-uppsats,

    Författare :Hedwig Haas; Hampus Fröjdholm; Carmen Lee; [2018]
    Nyckelord :plasma; sensor pad; transcutaneous; gas monitoring;

    Sammanfattning : Transcutaneous gas monitoring of oxygen and carbon dioxide is animportant method for monitoring the oxygenation and ventilation inprematurely born infants. The amount of gas diffusing through theskin is very small and current technology rely on heating of theskin to increase the gas amount, where transcutaneous oxygenrequires the highest temperature. LÄS MER