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1	Robust naval localization using a particle filter on polar amplitude gridmaps / Robust lokalisering i marina miljöer med polära amplitudrutnätskartor och partikelfilter Schiller, Carl January 2021 (has links) Maritime navigation heaviliy relies on GNSS and related technologies for positioning and navigiation. Since these technologies are vulnerable to external threats such as signal spoofing, alternatives are needed for backup purposes. Our proposal is to use radar to construct polar amplitude gridmaps tailored for the intended route, and using a particle filter for position estimation. The proposed approach has been successfully demonstrated on data from a surface vessel in the harbor of Helsinki. / Navigation i marina miljöer är idag mycket beroende av GNSS och relaterad teknologier. Eftersom dessa GNSS teknologier är föremål för terrorism och sabotage finns behov av alternativ. I detta examenarbete föreslås att använda radar ombord på ett fartyg för att konstruera amplitudrutnätskartor av omgivningen, och därefter använda ett partikelfilter för estimering av fartygets position.Fartygets position kunde framgångsrikt estimeras med data från ett fartyg i Helsingfors hamn. Amplitude gridmap particle filter position monitoring marine navigation. Amplitudrutnätskartor partikelfilter positionsestimering marin navigation. Computational Mathematics Beräkningsmatematik
2	Merchant Marine Deck Officer Agency Through Performative Acts Clark, Donald 06 September 2016 (has links) I bring together ethnographic interviews with deck officers, studies in actor-network theory, explicit and tacit knowledge theory, and performativity theory in this work. I prove that bridge technologies produce what are called mimeomorphic (repeatable with some variation) actions that contain no deck officer collective tacit knowledge. I argue that deck officer bridge watch situated actions are mostly polimorphic (actions can vary depending on social context), and these actions are in fact performatives (in an Austin sense) derived from a more oral than literate performance production process. These performatives constantly build the mariner's identity within the maritime deck officer community and their successful performatives give deck officers agency in the form of an oppositional view to deskilling. These same performative acts are the value of the mariner's experiential technological knowledge within the ship's bridge technology framework. / Ph. D. Actor-network Theory Tacit Knowledge Commedia Del'Arte Deskilling ECDIS Experiential Technical Knowledge Marine Navigation Merchant M Deck Officer Mimeomorphic Performative Act Performativity Polimorphic Situated Action

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Robust naval localization using a particle filter on polar amplitude gridmaps / Robust lokalisering i marina miljöer med polära amplitudrutnätskartor och partikelfilter

Merchant Marine Deck Officer Agency Through Performative Acts