Sökning: "Distance laboratory"

Visar resultat 1 - 5 av 63 uppsatser innehållade orden Distance laboratory.

  1. 1. Inre erosion i tätjord av morän, laboratorieprovning

    Uppsats för yrkesexamina på avancerad nivå, Luleå tekniska universitet/Institutionen för samhällsbyggnad och naturresurser

    Författare :Robin Edvinsson; [2024]
    Nyckelord :erosion; tätjord; morän; laboratorieprovning; kontakterosion;

    Sammanfattning : In the spring of 2022, large parts of an approximately 80-year-old earth fill dam in Burvattnet Jämtland were demolished. The demolished parts consisted of a homogeneous dust body of glacial moraine that was founded on soil. LÄS MER

  3. 2. Monitoring of Partial Discharges on Cable Terminations : An experimental approach to evaluate non-conventional online PD measurement techniques

    Master-uppsats, KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Författare :Tony Sibo; [2023]
    Nyckelord :Monitoring; Partial discharges; Medium-voltage cable terminations; Sensor performance; Reliability evaluation; Infrared camera IR-camera ; Ultrasonic emission sensor AE-sensor ; Temperature and relative humidity sensor TRH-sensor ; High frequency current transformer HFCT ; Transient earth voltage antenna TEV-antenna ; Conventional VS non-conventional PD measurement techniques; Övervakning; Partiella urladdningar; Mellanspänningskabelslut; Evaluering av sensorprestanda; Utvärdering av systemets tillförlitlighet; Infraröd kamera; Ultraljudssensor; Temperatur- och relativ fuktighetssensor; Högfrekvent strömtransformator; Transient jordspänningsantenn; Konventionella vs icke-konventionella mättekniker;

    Sammanfattning : The transmission of electric power over long distances has historically posed challenges. However, the advent of high-voltage engineering has not only addressed distance barriers and power losses in electricity transmission and distribution, but it has also significantly improved the efficiency and transmission capacity of power grids. LÄS MER

  4. 3. Investigation on Enhancing Fire Threat Perception in Virtual Reality through Subject-Expectancy Effect

    Master-uppsats, Lunds universitet/Avdelningen för Brandteknik

    Författare :Hsuan-Ting Liu; [2023]
    Nyckelord :Virtual reality; safe distance; subject-expectancy effect; thermal radiation; placebo effect; fire scenario.; Technology and Engineering;

    Sammanfattning : This thesis examines the use of subject-expectancy effect on enhancing fire threat perception in virtual reality. The study involves a virtual fire scenario design and 33 participants who experience virtual fires of three different scales in the scenario using a head-mounted display as visual and auditory perception and adopting physical movement in real world as their way of locomotion. LÄS MER

  5. 4. Noggrannhet av RTK-GPS-positionering av enskilda frön vid precisionssådd

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

    Författare :Oskar Wikfeldt; Christoffer Pålsson Andersson; [2023]
    Nyckelord :Agriculture; Individual plant care; RTK; GPS; GNSS; Geo-referencing; Seed mapping; Agriculture and Food Sciences; Technology and Engineering;

    Sammanfattning : With higher demands on farmers to reduce the usage of fertilizers and pes ti cides because of their negative environmental impact, as well as the rising prices of resources required for agriculture, precision agriculture has become a big focus in today’s agriculture research. Individual plant care systems are a big part of precision agriculture, and accurate information about the po si tions of individual plants is required for these systems. LÄS MER

  7. 5. Focal Spot Optimization Using Spatial Light Modulation and a Phase Retrieval Algorithm

    Master-uppsats, Lunds universitet/Atomfysik; Lunds universitet/Fysiska institutionen

    Författare :Robert Petersen; [2023]
    Nyckelord :Spatial Light Modulation; Phase Retrieval Algorithm; Focal Spot Optimization; Adaptive Optics; Wavefront Sensing; Lasers; Physics and Astronomy; Technology and Engineering;

    Sammanfattning : Aberrations to the wavefront of a laser beam reduce the quality of the focal spot and are generally undesired. This project is aimed at determining the aberrations of laser beams by using a phase retrieval algorithm and to show that it is possible to correct the aberrations with a spatial light modulator to optimize the focal spot. LÄS MER