Essays about: "underwater"

Showing result 26 - 30 of 178 essays containing the word underwater.

  1. 26. Global Warming Induced by Oceanic Anoxic Event 1a Had a Pronounced Impact on the Early Cretaceous Terrestrial Vegetation of Southern Sweden

    University essay from Uppsala universitet/Paleobiologi

    Author : Marcos Amores; [2022]
    Keywords : palynology; spore-pollen; biostratigraphy; oceanic anoxic event 1a; high-latitude; Early Cretaceous;

    Abstract : The Mesozoic is punctuated by several rapid global warming events that are marked by the worldwide deposition of organic-rich marine sediments. These events, known as oceanic anoxic events (OAEs), are characterised by intervals where the worldwide carbon cycle suffers a disruption due to major palaeoceanographic and climatic shifts, leading to anoxic marine environments and the creation of black shales. READ MORE

  3. 27. Pixel correspondences for SLAM using sidescan sonar with canonical representations

    University essay from KTH/Skolan för elektroteknik och datavetenskap (EECS)

    Author : Weiqi Xu; [2022]
    Keywords : ;

    Abstract : Acoustic instruments play an important role in autonomous underwater vehicles (AUVs). Sidescan sonar (SSS) detects a wider range, provides photo-realistic images in high resolution, and has lower price than the multibeam echo sounder (MBES). READ MORE

  4. 28. Design of an Autonomous underwater drone for achieving efficiency in the operation of the sensor package during monitoring of water bodies

    University essay from Blekinge Tekniska Högskola

    Author : Muaz Abdul Muti; [2022]
    Keywords : Autonomous; drone; sensor; stainless steel;

    Abstract : Background: the process of water quality monitoring is a critical quality assurance process. However, conventional methods include monitoring by a team of divers going to different depths to collect water samples. This method is expensive, time-consuming, and can lead to adverse consequences like a fatality. READ MORE

  5. 29. USING N-MODULAR REDUNDANCYWITH KALMAN FILTERS FORUNDERWATER VEHICLE POSITIONESTIMATION

    University essay from Mälardalens högskola/Akademin för innovation, design och teknik

    Author : Axel Enquist; [2022]
    Keywords : MATLAB; Simulink; Kalman filter; n-Modular Redundancy; Underwater;

    Abstract : Underwater navigation faces many problems with accurately estimating the absolute positionof an underwater vehicle. Neither Global Positioning system (GPS) nor Long Baseline (LBL) orShort Baseline (SBL) are possible to use for a military vehicle acting under stealth, since thesetechniques require the vehicle to be in the vicinity of a nearby ship or to surface and raise its antenna. READ MORE

  6. 30. Autonomous Underwater Inspection of Caving Systems

    University essay from Luleå tekniska universitet/Institutionen för system- och rymdteknik

    Author : Filip Persson; [2022]
    Keywords : ;

    Abstract : This thesis aims to create and design a way for a unmanned underwater vehicle to navigateunderwater without the need for human interaction in order to carry out inspections of underwaterstructures or caving systems in a safe and effective manner. The inspection of underwater structuresor underwater caving systems is a difficult and expensive process. READ MORE