Browsing Institutt for marin teknikk by Title
Now showing items 3313-3332 of 3471
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Undervanns baneplanlegging ved bruk av sonarbildedata
(Master thesis, 2019)Fjernstyrte undervannsfartøy (ROV) er mye brukt i offshore-industrien til forskjellige oppgaver og gjørem ̊al som tekniske inngrep, observasjoner og utforskning. For å redusere avhengigheten av over- flateskip og piloter ... -
Undervanns Objektdetektering ved bruk av en Convolutional Neural Network Basert Deteksjons Modell
(Master thesis, 2019)Denne masteroppgaven tar sikte på å utnytte en etablert Convolutional Neural Network (CNN) basert detekteringsmetode for å undersøke dens ytelse når det kommer til å automatisk klassifisere og lokalisere strukturer og ... -
Underwater explosions near marine structures: a Dynamics Fluid Structure Domain-Decomposition strategy
(Chapter, 2016)Historically underwater explosions (UEs) have been investigated for their huge military relevance, but they remain an important issue also for civil marine applications. As an example, UEs can occur near or on oil-gas ... -
Underwater hyperspectral imaging as an in situ taxonomic tool for deep-sea megafauna
(Journal article; Peer reviewed, 2018)Identification of benthic megafauna is commonly based on analysis of physical samples or imagery acquired by cameras mounted on underwater platforms. Physical collection of samples is difficult, particularly from the deep ... -
Underwater hyperspectral imaging: a new tool for marine archaeology
(Journal article; Peer reviewed, 2018)By applying an underwater hyperspectral imager (UHI) to a selection of archaeological artifacts, we have found spectral signatures that are representative of materials likely to be present at wreck sites. By successfully ... -
Underwater Machine Vision for Long Term Operation of Robotic Platforms
(Master thesis, 2023)Denne masteroppgaven fokuserer på å forbedre geolokalisering under vann ved å identifisere den mest effektive metoden for forbehandling av data og registrering av punktskyer. Vi undersøker et flerårig 3D-punktsky-datasett ... -
Underwater parachute, an alternative installation method
(Master thesis, 2018)In the following thesis the concept of free-falling underwater parachute systems are investigated, as a substitute for traditional methods for installing subsea structures. Model size experimental research has been carried ... -
Underwater Pose Estimation with Deep Learning
(Master thesis, 2019)Denne masteroppgaven undersøker om dyp læring kan anvendes for kamerabasert lokalisering av undervannsfartøy. En undergren innenfor dype nevrale nettverk, nemlig convolutional neural networks (CNN), er valgt for dette ... -
Underwater Position and Attitude Estimation Using Acoustic, Inertial, and Depth Measurements
(Peer reviewed; Journal article, 2019)This article considers the problem of constructing an observer for estimating position, velocity, attitude, underwater wave speed, rate sensor bias, and accelerometer bias that has both proven stability and close-to-optimal ... -
Underwater Positioning using near Surface Long Baseline Transponder’s Induced by Wave Motion
(Chapter, 2017)This paper presents a filter for underwater positioning in an aquaculture environment with demanding weather conditions. The positioning system is based on acoustic transponders mounted at a net pen on the sea surface. The ... -
Unsteady hydrodynamic forces of solid objects vertically entering the water surface
(Journal article; Peer reviewed, 2019)We investigate the unsteady hydrodynamic force of solid objects vertically entering water with an air cavity behind the falling body. Physical models are proposed to represent the force components corresponding to the body ... -
Unsteady RANS Simulation of Flow around Rectangular Cylinders with different Aspect Ratios at High Reynolds Number
(Master thesis, 2014)Computational Fluid Dynamics (CFD) has been used to evaluate essential hydrodynamic quantities and flow structures around rectangular cylinders with different chord length to depth ratios (aspect ratios) at high Reynolds ... -
Upheaval Buckling of Offshore Pipelines
(Master thesis, 2013)The main purpose of this thesis was to develop a MATLAB program based on Terndrup-Pedersen? analytical method for upheaval buckling analysis and verify the analytical model by comparing with FE analysis using software ... -
An upright bottomless vertical cylinder with baffles floating in waves
(Peer reviewed; Journal article, 2022)Damping of the surge and pitch motions, as well as the first lateral sloshing mode in a rigid free-floating upright circular dock with bilge boxes and open bottom is investigated. Model tests are carried out on a 0.80 m ... -
Upscaling, analysis, and design of a floating vertical axis wind turbine - Oppskalering, analyse, og design av en flytende vindturbin med vertikal aksle
(Master thesis, 2018)There are currently two main trends governing research and development in the offshore wind industry. The first one is upscaling, i.e. manufacturing larger and more powerful wind turbines; the second one is platform ... -
Use of an Autonomous Surface Vehicle reveals small-scale diel vertical migrations of zooplankton and susceptibility to light pollution under low solar irradiance
(Journal article; Peer reviewed, 2018)Light is a major cue for nearly all life on Earth. However, most of our knowledge concerning the importance of light is based on organisms’ response to light during daytime, including the dusk and dawn phase. When it is ... -
Use of CFD to Study Hydrodynamic Loads on Free-Fall Lifeboats in the Impact Phase.: A verification and validation study.
(Master thesis, 2012)In the past, testing of lifeboat design has been carried out solely by experimental means. However, due to the large number of factors which influence the loads on the lifeboat structure and its occupants, optimization ... -
Use of Clusters in a Route Generation Heuristic for Distribution of Fish Feed
(Master thesis, 2017)Fish farming is an industry in growth which is also expanding its area of operation. Among the biggest cost-contributors are costs associated with the distribution of fish feed. The demand is heavily varied and the system ... -
Use of in-service data to determine the added power of a ship due to fouling
(Master thesis, 2019)Det er et økende fokus på energi effektivitet i verden og shipping industrien er ikke noe unntak. Nye og strengere regler om utslipp er ett eksempel på dette. Flere og flere skip blir utstyrt med automatiske data samlings ... -
Use of oil tanker return/ballast space for the transportation of freshwater
(Master thesis, 2010)This report analyzes the concept of using oil tankers’ free cargo space and/or segregated ballast tanks to transport freshwater on the return leg, i.e. from oil unloading port back to oil loading port – also called freshwater ...