Browsing Institutt for marin teknikk by Title
Now showing items 3012-3031 of 3421
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Study of a novel fish farm concept consisting of a large-volume spar and nets
(Master thesis, 2020)I løpet av de siste par årene har det dukket opp mange nye konsepter for produksjon av laksefisker. Mye på grunn av Fiskeridirektoratets utdelinger av utviklingstillatelser. Mange av disse konseptene er komplekse konstruksjoner ... -
Study of Critical Imaging Parameters and Variables for Environmental Monitoring Using an ROV with Experimental Results
(Master thesis, 2013)In the oil and gas industry there is a high focus on integrating technology in the environmental monitoring happening before, during and after an offshore operation. In order to properly monitor the underwater environment, ... -
Study of Critical Imaging Parameters and Variables for Environmental Monitoring Using an ROV with Experimental Results
(Master thesis, 2013)In the oil and gas industry there is a high focus on integrating technology in the environmental monitoring happening before, during and after an offshore operation. In order to properly monitor the underwater environment, ... -
Study of hydrodynamic forces on complex structures
(Chapter, 2018)This paper presents a study on the interaction of structural members that can be related to a complex structure placed in a moonpool. The complex structure in the moonpool was simplified with a varying number of members. ... -
Study on backscattering from fish school near pump intake
(Master thesis, 2013)In this master project, acoustic method was applied for estimating the gradually changed fish density during the crowding near the pump intake in salmon plant. The purpose was to detect if the sensitivity of the echo sounder ... -
Study on the effect of ice-structure interaction on the dynamic response of a monopile offshore wind turbine
(Chapter, 2015)Offshore wind energy is an attractive technology for renewable energy. For cold climate regions, such as Canada, Baltic Sea, Bohai Bay, ice load is one of the important dynamic loads for offshore wind turbine (OWT). This ... -
Study on the static behavior of installing a deep-water drilling riser on a production platform
(Peer reviewed; Journal article, 2020)Riser interference caused by wake effects between adjacent risers severely threatens the safety during riser installation process on a Dry-Tree Tension Leg Platform (TLP) system. Due to the ignorance of interference effect, ... -
Submerged Towing and Upending of TLP Thethers - Numerical Simulations and Assessment of Operational Limits
(Master thesis, 2016)In the event of transport, installation and operation of subsea oil and gas factories, marine operations are often a huge part of the total capital expenditure. As a result of this, oil and gas companies are looking for ... -
Subsea Cable Tracking using Sensor Fusion on an Autonomous Underwater Vehicle
(Master thesis, 2017)Surveys of underwater power cables by Remotely Operated Vehicles (ROVs) are time demanding and expensive. We want to examine the possibility of using an Autonomous Underwater Vehicle (AUV) with magnetometers for estimating ... -
Subsea Hydraulic Leakage Detection and Diagnosis
(Master thesis, 2010)The motivation for this thesis is reduction of hydraulic emissions, minimizing of process emergency shutdowns, exploitation of intervention capacity, and reduction of costs. Today, monitoring of hydraulic leakages is scarce ... -
Subsurface towing of a subsea module
(Master thesis, 2010)This thesis serves as a preparatory study for a new concept in subsurface towing proposed by Acergy Norway. 3 different mathematical methods for determining the most important dynamics occurring during a subsurface towing ... -
Subsurface towing of heavy module
(Master thesis, 2011)The offshore industry is expanding, new contracts are offered all over the world and new oil fields are discovered deeper and further offshore. With this expansion follows great business opportunities for existing and new ... -
Sufficient conditions for uniform asymptotic stability and input-to-state stability using high-order control barrier functions
(Peer reviewed; Journal article, 2023)Control barrier functions (CBFs) ensure safety of controlled dynamical systems by enforcing forward invariance of safe subsets of the state space. First-order CBFs are applicable for systems where the control input appears ... -
Sulphur Abatement Globally in Maritime Shipping
(Journal article; Peer reviewed, 2017)In 2016, the International Maritime Organization (IMO) decided on global regulations to reduce sulphur emissions to air from maritime shipping starting 2020. The regulation implies that ships can continue to use residual ... -
Supervised Dynamic Probabilistic Risk Assessment of Complex Systems, Part 1: General Overview
(Peer reviewed; Journal article, 2021)Dynamic probabilistic risk assessment (DPRA) is a systematic and comprehensive methodology that has been used and refined over the past decades to evaluate risks associated with complex systems. However, current approaches ... -
Supervised dynamic probabilistic risk assessment of complex systems, part 2: Application to risk-informed decision making, practice and results
(Peer reviewed; Journal article, 2021)One challenge that has received attention in maritime industry is assessing the risk level of dynamic positioning (DP) systems in emergency situations. Statistics from recent years have shown that the risk level of some ... -
Supervised dynamic probabilistic risk assessment: Review and comparison of methods
(Peer reviewed; Journal article, 2022)With the adoption of autonomous systems in higher levels of autonomy, large-scale, complex and dynamic systems are becoming commonplace. Ensuring safe operation of safety-critical autonomous systems is paramount, typically ... -
Supervisory Control of Line Breakage for Thruster-Assisted Position Mooring System
(Chapter, 2015)Thruster-assisted position mooring (TAPM) is an energy-efficient and reliable stationkeeping method for deep water structures. Mooring line breakage can significantly influence the control system, and ultimately reduce ... -
Supervisory Risk Control of Autonomous Surface Ships
(Journal article; Peer reviewed, 2022)The objective of this paper is to develop online risk models that can be updated as conditions change, using risk as one metric to control an autonomous ship in operation. This paper extends and integrates the System ... -
Supervisory-switched Control for Dynamic Positioning Systems in Arctic Areas
(Master thesis, 2010)Dynamically positioned vessels may experience rapidly changing environmental loads if the vessels are operating in ice-covered waters. The transition between open water to level ice is an abrupt change from no ice loads ...