Sökning: "Debris"

Visar resultat 16 - 20 av 217 uppsatser innehållade ordet Debris.

  1. 16. Evaluation of the auroral large imagining system for automatic space debris detection

    Master-uppsats, Luleå tekniska universitet/Rymdteknik

    Författare :Pulmu Pietikäinen; [2023]
    Nyckelord :Space debris; optical system; auroral imager;

    Sammanfattning : The performance of the auroral large imagining system (ALIS_4D) and an automatic track detection algorithm was evaluated for space debris surveillance and tracking. The evaluation of the ALIS_4D was done through a numerical simulation and data annotations, while the track detection results were manually evaluated. LÄS MER

  3. 17. Support for autonomously driven systems in harsh environments. : Degree project for Master of Science in mechanical engineering with focus on innovation and sustainable product development

    Uppsats för yrkesexamina på avancerad nivå, Blekinge Tekniska Högskola/Institutionen för maskinteknik

    Författare :Mohammed Aljafari; [2023]
    Nyckelord :Sensor; Temperature measurement; Maintenance free; Autonomous system; Sensor; Temperatmätning; Underhållsfri; Autonomt system; Design thinking;

    Sammanfattning : Symptoms of harsh environments create pressure on autonomous machines to work wellwith the use of measurement devices. Sensors used within construction equipment vehiclessuffer from being covered with fogs of dirt, oil, water, and dust. LÄS MER

  4. 18. Risk Assessment for Space Debris Collisions

    Master-uppsats, KTH/Lättkonstruktioner, marina system, flyg- och rymdteknik, rörelsemekanik

    Författare :Kenny Andersson; [2023]
    Nyckelord :space debris; NASA standard breakup model; satellite fragmentations; satellite fragmentation modelling; space surveillance and tracking; ESA MASTER; collision risk; risk assessment; space situational awareness; rymdskrot; NASA standard breakup model; satellitfragmentering; modellering av satellitfragmentering; inmätning och övervakning av rymdobjekt; ESA MASTER; kollisionsrisk; riskbedömning; rymdlägesbild;

    Sammanfattning : The increasing reliance on space infrastructure and its rapid expansion necessitate the development and enhancement of tools for space debris and fragmentation research. Accurate prediction of the risks associated with satellite fragmentation requires comprehensive understanding of the dynamics involved. LÄS MER

  5. 19. Differences and similarities in stand characteristics after prescribed burning and wildfire : implications for conservation of forest biodiversity

    Master-uppsats, SLU/Dept. of Ecology

    Författare :Hannah Sophie Jakob; [2023]
    Nyckelord :coarse woody debris; conservation; biodiversity; boreal forest; Daldinia loculata; Fennoscandia; prescribed burning; regeneration; wildfire; woodpecker;

    Sammanfattning : 1. Wildfires are a natural disturbance in the boreal forests of Fennoscandia and have shaped and formed forests in the past, resulting in very heterogeneous forests containing large amounts of dead and living trees in various age classes. LÄS MER

  7. 20. Testing of AblativeMaterials as a Protective Coating for Rocket Launch Pads

    Master-uppsats, KTH/Skolan för industriell teknik och management (ITM)

    Författare :Gioele Daka; [2023]
    Nyckelord :Ablative Materials; Protective Coating; Rocket Launchpad; Refractory Materials; Oxyacetylene Torch; Slug Calorimeter; Ablativa material; Skyddande beläggning; Raketstartplatta; eldfast material; acetylensyrebrännare; kopparkalorimeter;

    Sammanfattning : As the space market grows, demand for sites to host rocket tests and to launch satellites to orbit is expected to increase. During these activities, the launch infrastructure needs to withstand the extreme thermal and mechanical loads associated with the exhaust of a rocket engine. LÄS MER