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Статті в журналах з теми "Marine drone"
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Kelaher, Brendan P., Victor M. Peddemors, Brent Hoade, Andrew P. Colefax, and Paul A. Butcher. "Comparison of sampling precision for nearshore marine wildlife using unmanned and manned aerial surveys." Journal of Unmanned Vehicle Systems 8, no. 1 (March 1, 2020): 30–43. http://dx.doi.org/10.1139/juvs-2018-0023.
Повний текст джерелаАнотація:
Aerial surveys of large marine wildlife in nearshore areas can support management actions to ensure conservation of this megafauna. While most aerial surveys of marine wildlife have been carried out using manned aircraft, unmanned aerial systems (commonly known as drones) are being increasingly used. Here, we compare the relative accuracy and precision of marine wildlife surveys from a multirotor drone and a manned helicopter for the first time. At two locations on the east coast of Australia, we simultaneously surveyed sharks (including white sharks, Carcharodon carcharias), dolphins, rays, and sea turtles in nearshore coastal areas using a multirotor drone (DJI Inspire I) and a helicopter (Robinson 44 Clipper II) over 26 separate flights. Sampling included the real-time quantification of marine wildlife by an observer in the helicopter and the pilot of the drone. The video feed from the drone was then later re-sampled in the laboratory. Of the three methods, post-hoc analysis of drone video footage is likely to provide the most accurate and precise estimates of marine wildlife in nearshore areas. When real-time data are required (e.g., for shark-risk mitigation), manned helicopters (over larger stretches of coast) and drones (across localised beaches) will both be useful.
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Raoult, Vincent, Andrew P. Colefax, Blake M. Allan, Daniele Cagnazzi, Nataly Castelblanco-Martínez, Daniel Ierodiaconou, David W. Johnston, et al. "Operational Protocols for the Use of Drones in Marine Animal Research." Drones 4, no. 4 (September 25, 2020): 64. http://dx.doi.org/10.3390/drones4040064.
Повний текст джерелаАнотація:
The use of drones to study marine animals shows promise for the examination of numerous aspects of their ecology, behaviour, health and movement patterns. However, the responses of some marine phyla to the presence of drones varies broadly, as do the general operational protocols used to study them. Inconsistent methodological approaches could lead to difficulties comparing studies and can call into question the repeatability of research. This review draws on current literature and researchers with a wealth of practical experience to outline the idiosyncrasies of studying various marine taxa with drones. We also outline current best practice for drone operation in marine environments based on the literature and our practical experience in the field. The protocols outlined herein will be of use to researchers interested in incorporating drones as a tool into their research on marine animals and will help form consistent approaches for drone-based studies in the future.
3
Pham, Duc-Anh, and Seung-Hun Han. "Design of Combined Neural Network and Fuzzy Logic Controller for Marine Rescue Drone Trajectory-Tracking." Journal of Marine Science and Engineering 10, no. 11 (November 10, 2022): 1716. http://dx.doi.org/10.3390/jmse10111716.
Повний текст джерелаАнотація:
In recent years, the research on drones has increased rapidly because of its high applicability in many fields and its great development potential. In the maritime sector too, especially marine rescue, a Drone with a compact size and fast flight speed is an effective solution in search and surveillance, giving quick results and being very convenient. When operating at sea, marine rescue drones are often affected by the environment, especially wind, which leads to turbulence that causes the drone to deviate from its predetermined flight trajectory. To overcome the above problem, the author has proposed the application of a Neural-Fuzzy controller for unmanned marine rescue aircraft presented in this paper introduces a controller that combines neural networks and fuzzy controllers that enhance the efficiency of the drone’s trajectory tracking. The paper presents the mathematics of a quadcopter described by the Newton-Euler equations. Presentation on stable flight control and trajectory control of marine rescue drones. In this paper, Matlab/Simulink is used to describe the operation of the Drone, and the characteristics obtained after using the simulation are used to compare, test, and analyze the system. The obtained results show that the Neural-Fuzzy controller is much more sensitive, more resistant to turbulence, and can be used on different sizes, weights, and configurations of drones without adjusting PID gain.
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Mocanu, Vlad. "Charging floating bases for marine unmanned aerial drone." Scientific Bulletin of Naval Academy XXIII, no. 1 (July 15, 2020): 116–21. http://dx.doi.org/10.21279/1454-864x-20-i1-015.
Повний текст джерелаАнотація:
In this paper, the authors present new ways of using drones in the marine and offshore environments. The article includes the presentation of the main constructive electrical elements of a marine floating buoy, which play the role of charging base for an unmanned aerial drone. Also, are highlighted the main losses of the system’s components, what should have been taken into account when choosing the size of such an independent energy source, as well as the main steps for energy source design.
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Lim, Jae-Jun, Dae-Won Kim, Woon-Hee Hong, Min Kim, Dong-Hoon Lee, Sun-Young Kim, and Jae-Hoon Jeong. "Application of Convolutional Neural Network (CNN) to Recognize Ship Structures." Sensors 22, no. 10 (May 18, 2022): 3824. http://dx.doi.org/10.3390/s22103824.
Повний текст джерелаАнотація:
The purpose of this paper is to study the recognition of ships and their structures to improve the safety of drone operations engaged in shore-to-ship drone delivery service. This study has developed a system that can distinguish between ships and their structures by using a convolutional neural network (CNN). First, the dataset of the Marine Traffic Management Net is described and CNN’s object sensing based on the Detectron2 platform is discussed. There will also be a description of the experiment and performance. In addition, this study has been conducted based on actual drone delivery operations—the first air delivery service by drones in Korea.
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Barreto, Jonathas, Luciano Cajaíba, João Batista Teixeira, Lorena Nascimento, Amanda Giacomo, Nelson Barcelos, Ticiana Fettermann, and Agnaldo Martins. "Drone-Monitoring: Improving the Detectability of Threatened Marine Megafauna." Drones 5, no. 1 (February 20, 2021): 14. http://dx.doi.org/10.3390/drones5010014.
Повний текст джерелаАнотація:
Unmanned aerial vehicles (UAVs; or drones) are an emerging tool to provide a safer, cheaper, and quieter alternative to traditional methods of studying marine megafauna in a natural environment. The UFES Nectology Laboratory team developed a drone-monitoring to assess the impacts on megafauna related to the Fundão dam mining tailings disaster in the Southeast Brazilian coast. We have developed a systematic pattern to optimize the available resources by covering the largest possible area. The fauna observer can monitor the environment from a privileged angle with virtual reality and subsequently analyzes each video captured in 4k, allowing to deepening behavioral ecology knowledge. Applying the drone-monitoring method, we have observed an increasing detectability by adjusting the camera angle, height, orientation, and speed of the UAV; which saved time and resources for monitoring turtles, sea birds, large fish, and especially small cetaceans efficiently and comparably.
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Jeon, I., S. Ham, J. Cheon, A. M. Klimkowska, H. Kim, K. Choi, and I. Lee. "A REAL-TIME DRONE MAPPING PLATFORM FOR MARINE SURVEILLANCE." ISPRS - International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences XLII-2/W13 (June 4, 2019): 385–91. http://dx.doi.org/10.5194/isprs-archives-xlii-2-w13-385-2019.
Повний текст джерелаАнотація:
<p><strong>Abstract.</strong> Marine incidents have caused serious casualties and damaged on property, and situational awareness and actions are needed to reduce further extensive damage for marine surveillance. The importance of an attempt for maritime monitoring using UAV has been raised, and a platform should be prepared to respond immediately to urgent situations. In this research, a real-time drone image mapping platform is proposed for marine surveillance that receives marine images acquired and transmitted by drones and processes them in real time. The platform proposed in this study is divided into 1) UAV System, 2) Real-time image processing, 3) Visualization. UAV system transfers data from a drone to the ground stations. Real-time image processing module generates individual orthophotos followed by directly georeferencing in real time and detecting ships on the orthophotos. Visualization module enables to visualize the orthophotos. The overall mapping time of 3.26 seconds on average was verified for processing image mapping, and ship detection time for a single image was estimated to be within about 1 second, which corresponds to an environment in which an emergency must be handled. In conclusion, a real-time drone mapping platform that is introduced in this study can be evaluated as being available for maritime monitoring that requires swift responses.</p>
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Joyce, K. E., S. Duce, S. M. Leahy, J. Leon, and S. W. Maier. "Principles and practice of acquiring drone-based image data in marine environments." Marine and Freshwater Research 70, no. 7 (2019): 952. http://dx.doi.org/10.1071/mf17380.
Повний текст джерелаАнотація:
With almost limitless applications across marine and freshwater environments, the number of people using, and wanting to use, remotely piloted aircraft systems (or drones) is increasing exponentially. However, successfully using drones for data collection and mapping is often preceded by hours of researching drone capabilities and functionality followed by numerous limited-success flights as users tailor their approach to data collection through trial and error. Working over water can be particularly complex and the published research using drones rarely documents the methodology and practical information in sufficient detail to allow others, with little remote pilot experience, to replicate them or to learn from their mistakes. This can be frustrating and expensive, particularly when working in remote locations where the window of access is small. The aim of this paper is to provide a practical guide to drone-based data acquisition considerations. We hope to minimise the amount of trial and error required to obtain high-quality, map-ready data by outlining the principles and practice of data collection using drones, particularly in marine and freshwater environments. Importantly, our recommendations are grounded in remote sensing and photogrammetry theory so that the data collected are appropriate for making measurements and conducting quantitative data analysis.
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Rowe, Claire E., Will F. Figueira, Brendan P. Kelaher, Anna Giles, Lea T. Mamo, Shane T. Ahyong, and Stephen J. Keable. "Evaluating the effectiveness of drones for quantifying invasive upside-down jellyfish (Cassiopea sp.) in Lake Macquarie, Australia." PLOS ONE 17, no. 1 (January 19, 2022): e0262721. http://dx.doi.org/10.1371/journal.pone.0262721.
Повний текст джерелаАнотація:
Upside-down jellyfish (Cassiopea sp.) are mostly sedentary, benthic jellyfish that have invaded estuarine ecosystems around the world. Monitoring the spread of this invasive jellyfish must contend with high spatial and temporal variability in abundance of individuals, especially around their invasion front. Here, we evaluated the utility of drones to survey invasive Cassiopea in a coastal lake on the east coast of Australia. To assess the efficacy of a drone-based methodology, we compared the densities and counts of Cassiopea from drone observations to conventional boat-based observations and evaluated cost and time efficiency of these methods. We showed that there was no significant difference in Cassiopea density measured by drones compared to boat-based methods along the same transects. However, abundance estimates of Cassiopea derived from scaling-up transect densities were over-inflated by 319% for drones and 178% for boats, compared to drone-based counts of the whole site. Although conventional boat-based survey techniques were cost-efficient in the short-term, we recommend doing whole-of-site counts using drones. This is because it provides a time-saving and precise technique for long-term monitoring of the spatio-temporally dynamic invasion front of Cassiopea in coastal lakes and other sheltered marine habitats with relatively clear water.
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Kelaher, Brendan P., Andrew P. Colefax, Alejandro Tagliafico, Melanie J. Bishop, Anna Giles, and Paul A. Butcher. "Assessing variation in assemblages of large marine fauna off ocean beaches using drones." Marine and Freshwater Research 71, no. 1 (2020): 68. http://dx.doi.org/10.1071/mf18375.
Повний текст джерелаАнотація:
The turbulent waters off ocean beaches provide habitat for large marine fauna, including dolphins, sharks, rays, turtles and game fish. Although, historically, these assemblages have proven difficult to quantify, we used a new drone-based approach to assess spatial and temporal variation in assemblages of large marine fauna off four exposed beaches in New South Wales, Australia. In total, 4388 individual large marine animals were identified from 216 drone flights. The most common taxa, bottlenose dolphins (Tursiops spp.) and Australian cownose rays (Rhinoptera neglecta), occurred in 25.5 and 19.9% of flights respectively. White (Carcharodon carcharias), bull (Carcharhinus leucas) and other whaler (Carcharhinus spp.) sharks were observed in <1% of flights. There was significant variation in the structure of assemblages of large fauna among beaches, with those adjacent to riverine estuaries having greater richness and abundance of wildlife. Overall, drone surveys were successful in documenting the spatio-temporal dynamics of an impressive suite of large marine fauna. We contend that emerging drone technology can make a valuable contribution to the ecological information required to ensure the long-term sustainability of sandy-beach ecosystems and associated marine wildlife.
Дисертації з теми "Marine drone"
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Tranchant, Yann-Treden. "Vers une meilleure exploitation de l’altimétrie côtière : apports combinés de la modélisation hydrodynamique à haute-résolution et des nouvelles techniques de cartographie du niveau marin par GNSS." Thesis, La Rochelle, 2022. http://www.theses.fr/2022LAROS014.
Повний текст джерелаАнотація:
La mesure du niveau de la mer par satellite a atteint un niveau sans précédent en termes de précision et de couverture spatio-temporelle. Ces observations nous ont permis d'améliorer notre compréhension de la dynamique à grande échelle des océans, mais leur exploitation reste un défi à l’approche de la côte, où les incertitudes liées à la marée océanique et aux fines échelles du géoïde sont plus importantes. L’objectif de cette thèse est de développer de nouvelles méthodologies s’appuyant sur les mesures mobiles du niveau de la mer par GNSS et la modélisation hydrodynamique afin de mieux exploiter les mesures altimétriques côtière et de préparer l’arrivée des futures missions. Lors d’une campagne menée avec le drone marin PAMELi en Juillet 2020 dans les Pertuis Charentais, une cartographie du niveau marin est réalisée le long d’un itinéraire préprogrammé. Cette cartographie est exploitée afin d’évaluer un modèle de marée sous une trace altimétrique, et démontrer le potentiel d’un drone pour étendre spatialement nos capacités de validation. Par la suite, on estime les pentes de géoïde dans la zone à partir du même jeu de données, en combinant mesures in-situ et modèle hydrodynamique. On montre que la modélisation des gradients de topographie dynamique permet d’améliorer la précision de la cartographie des pentes de géoïde. Ces deux études exploitent une méthodologie basée sur les différences aux points de croisement, et offrent des perspectives sur l'utilisation des drones marins dans le contexte de la future mission SWOT. Enfin, on présente une méthode de prédiction du trait de côte basée sur l’utilisation d’un MNT et du modèle hydrodynamique, appliquée aux passage Sentinel-3A afin d’évaluer l’impact des bancs découvrant sur la mesure altimétrique. Dans leur ensemble, ces travaux constituent un socle méthodologique qui permettra de mieux comprendre et utiliser les mesures altimétriques dans les environnements côtiers, et préparer l’arrivée de la future mission SWOTSatellite altimetry has recently reached an unprecedented level of accuracy and coverage. Although altimeters were originally designed to observe the oceans and have improved our understanding of their large-scale dynamics, the exploitation in coastal areas remains a challenge. One of the challenges of coastal altimetry remains the lack of precision in geophysical corrections, which are essential to compute accurate sea level anomalies near the coast. The main objective of this thesis is to develop new methodologies based on mobile sea level GNSS measurements and hydrodynamic modelling in order to better exploit altimetry measurements in coastal environments and to prepare the arrival of future missions. During a campaign carried out with the PAMELi marine drone in July 2020 in the Pertuis Charentais, a sea-level cartography was carried out along a pre-programmed route. In a first study, this cartography is used to assess a tidal model under an altimetric pass, and thus demonstrate the potential of a drone to extend spatially our validation capabilities. Then, the same dataset is used to estimate the geoid slopes in the region, by combining in-situ measurements and the hydrodynamic model. We show that the use of our model to correct the dynamic topography gradients improves drastically the coherence and the accuracy of geoid slopes. These two studies exploit a methodology based on crossover height differences, and offer perspectives on the use of autonomous platforms in the context of the future SWOT mission. In a last chapter, a coastline prediction method based on the use of a DEM and the hydrodynamic model is presented, and applied to Sentinel-3A passages in order to evaluate the impact of intertidal areas on altimeter measurements. This overall thesis work provides methodological insights for a better understanding and exploitation of altimetry measurements in coastal environments, and will help to prepare the scientific exploitation of the future SWOT mission
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Capra, Veronica. "Mappatura della popolazione di Pinna nobilis con drone nella zona centro-meridionale della laguna di Venezia." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23073/.
Повний текст джерелаАнотація:
L’elaborato si concentra sullo studio di una popolazione di Pinna nobilis nella zona centro-meridionale della Laguna di Venezia, in un’area adiacente all’isola di Pellestrina (Italia).
Pinna nobilis (Linneaus 1758) è il più grande mollusco bivalve endemico del Mediterraneo, presente già a partire dalla fine del Miocene. Pinna nobilis, specie protetta dalla Direttiva Habitat (92/43/CEE), recentemente è stata inserita anche nella lista rossa IUNC a causa di eventi di mortalità di massa verificati lungo le coste del Mediterraneo a causa di un agente patogeno.
Da 10-15 anni a questa parte si è osservata una ricolonizzazione in laguna di Venezia.
In questo studio sono impiegate immagini da rilievo UAV per mappare la popolazione di Pinna nobilis e stimare la densità di copertura delle fanerogame marine, la cui presenza è un elemento importante per la stabilità del sedimento di fondo delle lagune. Oltre a indagini direttamente sul campo sono state svolte analisi di laboratorio sui campioni prelevati dall’area di studio in riferimento al contenuto di carbonio organico e alla granulometria dei sedimenti raccolti. Sono stati presi in considerazione 18 anni di dati della sonda multiparametrica Ve3 (Rete SAMANET) di proprietà del Provveditorato Interregionale alle Opere pubbliche del Veneto–Trentino Alto Adige–Friuli Venezia Giulia che consentono di esplorare i diversi fattori ambientali che possono aver influenzato la crescita e la salute di Pinna nobilis nell’area di studio. I risultati mostrano che la popolazione di Pinna nobilis si trova in stretta correlazione con la copertura di fanerogame marine, infatti in aree senza copertura anche il bivalve è assente. In merito ai diversi fattori ambientali indagati, in particolar modo la torbidità, presenta una diminuzione a partire dagli anni 2008/2009 rispetto ai precedenti. I sedimenti analizzati presentano una scarsa percentuale di carbonio organico ma sono caratterizzati dalla frazione sabbiosa (>63μm) superiore all’80%.
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Boëly, Nicolas. "Modélisation non linéaire et contrôle linéaire par retour entrée-sortie linéarisant d'un drone sous-marin quadri hélices à poussée vectorielle." Mémoire, École de technologie supérieure, 2010. http://espace.etsmtl.ca/298/1/BO%C3%8BLY_Nicolas.pdf.
Повний текст джерелаАнотація:
Le sujet de ce mémoire porte sur la recherche de la modélisation des drones sous-marins qui
concernent les interactions hydrodynamiques, les forces de pesanteur et d’Archimède ainsi
que les forces de propulsion.
La précision du comportement d’un drone sous-marin en simulation numérique dépend de
son degré de modélisation. Ce mémoire fonde une modélisation non linéaire (six degrés de
liberté) de l’engin afin de conserver les interactions entre les modes longitudinaux et les
modes latéraux.
Les applications de cette modélisation sont doubles. Premièrement, elle permet de mieux
comprendre le comportement et l’attitude des véhicules immergés. La seconde application
permet de mieux contrôler le drone dans des buts de furtivité ou d’économie d’énergie.
On présente ici la formulation par étape d’une modélisation non linéaire globale du drone
quadri hélices à poussée vectorielle, en expliquant les relations étroites entre les choix
architecturaux et les impacts de modélisation.
Des correcteurs Proportionnel Intégral Dérivé sont implémentés à l’aide d’un retour entréesortie
linéarisant afin de tester la maniabilité et les capacités du drone en espace restreint.
Une étude de robustesse aux bruits de mesure et les contrôles internes de chaque actionneur
et chaque moteur permettent de déterminer les limites de cette étude et les recommandations
des travaux futurs.
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Wang, Jianhua. "Contribution a la connaissance sedimentologique des formations miocenes marines de deux bassins du sud-est de la france : Sommieres (Gard), Crest (Drome)." Perpignan, 1986. http://www.theses.fr/1986PERP0021.
Повний текст джерела
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Jaud, Marion. "Techniques d'observation et de mesure haute résolution des transferts sédimentaires dans la frange littorale." Phd thesis, Université de Bretagne occidentale - Brest, 2011. http://tel.archives-ouvertes.fr/tel-00650953.
Повний текст джерелаАнотація:
Dans un contexte d'anthropisation croissante de la frange littorale, et d'intensification des risques côtiers, la mise en œuvre de politiques de Gestion Intégrée des Zones Côtières (GIZC) s'impose. Cette gestion se concrétise notamment par un suivi de l'évolution littorale, nécessitant des techniques adaptées à ce type d'environnement et permettant de mesurer les variations morphologiques mais également de mieux comprendre les processus mis en jeu. Cette thèse s'inscrit dans la problématique de développement de méthodes d'observation et de quantification de l'évolution morphodynamique. Elle se focalise sur un suivi 3D à très haute résolution spatiale de l'interface Terre-Mer au niveau d'une plage sableuse, de l'échelle journalière à pluri-annuelle. Les méthodes proposées s'appuient sur des techniques de télédétection : stéréo-photogrammétrie depuis un drone hélicoptère, acquisitions au Scanner Laser Terrestre (TLS) et acquisitions au Sondeur Multi-Faisceaux (SMF) petits fonds sur les parties immergées de la plage. Pour chacune de ces techniques, nous avons élaboré un protocole spécifique d'acquisition et de traitement des données aboutissant à la génération de Modèles Numériques de Terrain (MNT), puis de MNT différentiels diachroniques. Cette approche multi-source permet de fusionner les données terre-mer (sur une frange s'étendant du haut de plage à 15 m de profondeur) et offre ainsi une vision synoptique des transferts de matière au sein du compartiment sédimentaire. Les techniques présentées ont été mises en oeuvre à la Plage de Porsmilin (Mer d'Iroise). Les résultats des levés récurrents ont fait l'objet d'une analyse de la variabilité morpho-sédimentaire à différentes échelles spatio-temporelles. Le suivi de la cellule sédimentaire a permis de déterminer la profondeur de fermeture à l'échelle annuelle et d'identifier les tendances saisonnières. Aux échelles spatio-temporelles plus fines, nous avons pu étudier l'évolution de figures sédimentaires telles que des bermes ou des croissants de plages. Autant que possible, chaque observation s'accompagne d'une identification du (des) forçage(s) hydrodynamique(s) sous-jacent(s).
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Baron, Valentin. "Méthodes d’identification de sources acoustiques paramétriques par mesures d’antennerie." Thesis, Lyon, 2020. http://www.theses.fr/2020LYSEI121.
Повний текст джерелаАнотація:
La caractérisation de sources acoustiques a pour but de décrire des émetteurs sonores à travers certains paramètres comme leur localisation dans l'espace, le niveau sonore qu'ils produisent ou encore leur identification grâce à leur signature acoustique. Dans cette thèse, l'objectif est d'obtenir certains de ces trois paramètres dans deux cas d'application concrets, pour des sources situées en champ lointain et grâce à des antennes acoustiques. La première application concerne l'impact acoustique de la prospection minière sous-marine par grands fonds dans le cadre du projet FUI Abysound. Au sein du projet, la thèse cherche à caractériser les machines excavatrices placées sur les fonds marins en obtenant leur localisation et leur niveau sonore. Une première phase de design a abouti à la construction d'une antenne conique de 3 m. En s'appuyant ensuite sur les données issues de deux campagnes expérimentales menées en mer Méditerranée avec cette antenne, la méthode haute-résolution MUSIC localise précisément les sources mises en oeuvre, qu'elles soient mobiles et à plus de 600 m de l'antenne, ou immergées par 700 m de fond. Leur niveau sonore est ensuite estimé par formation de voies, et les niveaux attendus sont retrouvés pour des signaux monochromatiques ou à large bande. Dans la seconde application, une procédure complète pour la localisation et l'identification de drones est proposée pour la protection de sites sensibles. Elle combine traitement d'antenne et apprentissage statistique en s'articulant autour de trois étapes clés : la localisation, la focalisation et l'identification. La méthode MUSIC localise à nouveau les sources acoustiques présentes autour de l'antenne industrielle utilisée, puis la focalisation reconstruit le signal temporel de chacune, et un modèle SVM les identifie comme drone ou non. Les validations expérimentales, en intérieur comme en extérieur, constituent une contribution importante de ce travail de thèse. Les données acquises montrent entre autres que la procédure localise des drones à 3° près en extérieur, les détecte à 99 %, ou encore les identifie en présence d'une source perturbatrice plus puissanteAcoustic sources characterization aims to describe sound emitters through some parameters like their localization in space, the sound level they produce or their identification thanks to their acoustic signature. In this thesis, the objective is to obtain some of these parameters in two industrial application cases, for sources located in far-field and by the use of acoustic arrays. The first application concerns deep-sea mining acoustic impact in the context of Abysound FUI project. Within it, the thesis searches to characterize the excavation machine located on the seabed by assessing their localization and their sound level. First, a design phase has led to the construction of a 3 m size acoustic array. Then, using data from two experimental campaigns conducted in the Mediterranean Sea with this array, the high-resolution method MUSIC accurately localizes the used acoustic sources, either mobile and more than 600 m away from the array, or immersed by 700 m depth. Their sound level is then estimated by beamforming, and the expected levels are verified for monochromatic or wideband signals. In the second application, a complete procedure for the localization and the identification of drones is proposed to protect sensitive areas. It combines array processing and machine learning through three key steps: localization, focalization, and identification. MUSIC localizes again nearby acoustic sources around the industrial array used, then focalization reconstructs each temporal signal, and a SVM model identifies them as drone or not. Experimental validations, inside and outside, establish an important contribution of this thesis work. Acquired data show for instance that the procedure localizes drones with 3° accuracy outside, detects them at 99 %, or identifies them despite the presence of a more powerful source
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Nahirnick, Natasha K. "Long-term spatial-temporal eelgrass (Zostera marina) habitat change (1932-2016) in the Salish Sea using historic aerial photography and unmanned aerial vehicle." Thesis, 2018. https://dspace.library.uvic.ca//handle/1828/9380.
Повний текст джерелаАнотація:
Eelgrass (Zostera marina) is a critical nearshore marine habitat for juvenile Pacific salmon (Oncorhynchus spp.) as they depart from their natal streams. Given the poor marine survival of Coho (O. kisutch) and Chinook (O. tshawytscha) salmon juveniles in recent decades, it is hypothesized that deteriorating eelgrass habitats could contribute to their low survival. The primary goal of this research was to investigate the possible long-term spatial-temporal trends in eelgrass habitat in the Salish Sea and was addressed by two main objectives: (1) Define a methodology for mapping eelgrass habitats using UAV imagery to create a baseline for long-term mapping; and (2) Assess changes in eelgrass area coverage and fragmentation over the period of 1932-2016 using historic aerial photographs and Unmanned Aerial Vehicle (UAV) imagery, and assess the relationship between eelgrass and residential housing density and shoreline activities. Three study sites in the Southern Gulf Islands of the Salish Sea were chosen for analysis. The overall accuracies of eelgrass delineation from UAV imagery were 95.3%, 88.9%, and 90.1% for Village Bay, Horton Bay, and Lyall Harbour, respectively. The UAV method was found to be highly effective for this size of study site, however results were impacted by the environmental conditions at the time of acquisition, namely: sun angle, tidal height, cloud cover, water clarity, and wind speed. The results from the first objective were incorporated into a long-term dataset of historic aerial photography and used to evaluate changes in eelgrass area and fragmentation. All three eelgrass meadows showed a deteriorating trend in eelgrass condition. On average, eelgrass area coverage decreases by 41% while meadow complexity as indicated by the shape index increases by 76%. Shoreline activities (boats, docks, log booms, and shoreline armouring) and residential housing density increased markedly at all sites over the study period. By using a linear correlation model, it was revealed that eelgrass areal coverage and fragmentation (Shape Index) were, in general, very strongly correlated to these landscape-level coastal environmental indicators. While this correlation model is not meant to show a direct causative impact on eelgrass at these sites, these results suggest an overall deterioration of coastal environmental health in the Salish Sea due to a dramatic increase in the use of the coastal zone, as well as likely declines in water quality due to urbanization.Graduate
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Allart, Théo. "Relation entre la configuration de l'habitat dans la végétation aquatique submergée et la distribution des poissons." Thèse, 2020. http://depot-e.uqtr.ca/id/eprint/9724/1/eprint9724.pdf.
Повний текст джерелаКниги з теми "Marine drone"
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Corps, United States Marine. Unmanned aerial vehicle operations. Washington, DC: Dept. of the Navy, Headquarters, U.S. Marine Corps, 2003.
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Sincavage, Dr Suzanne, Dr Hans C. Mumm, Wayne Lonstein, CPT John Paul Hood, Randall Mai, Dr Mark Jackson, Mike Monnik, et al. DRONE DELIVERY OF CBNRECy – DEW WEAPONS Emerging Threats of Mini-Weapons of Mass Destruction and Disruption ( WMDD). Edited by Randall K. Nichols. New Prairie Press Open Book Publishing, 2022.
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Wich, Serge A., and Lian Pin Koh. Surveillance. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198787617.003.0004.
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In this chapter we review a number of cases where drones have been used for habitat and wildlife surveillance. Specifically we discuss their use in patrolling terrestrial and marine protected areas for detecting and documenting illegal activities. We highlight success stories, as well as key technical, ethical, and security issues.
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Oates, Rosamund. ‘The Laughter of Satan’. Oxford University Press, 2018. http://dx.doi.org/10.1093/oso/9780198804802.003.0002.
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This chapter explores the ideas at the heart of Puritanism, examining Tobie Matthew’s early radicalism. Using the controversies over vestments in 1564–6 and the visit of Elizabeth I to the University of Oxford in 1566, the chapter shows that the idea of ‘edification’ became a central principle of Puritanism. This chapter explores the spiritual demands of edifying reform and shows how it drove English Puritans into conflict with the monarch and the Established Church. It demonstrates that Matthew’s Puritanism was rooted in the experience of Marian exiles, and that he drew on their Calvinism and their resistance texts to justify his potentially seditious view of godly magistracy and rebellion.
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Marino, Katherine M. Feminism for the Americas. University of North Carolina Press, 2019. http://dx.doi.org/10.5149/northcarolina/9781469649696.001.0001.
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This book chronicles the dawn of the global movement for women’s rights in the first decades of the twentieth century. The founding mothers of this movement were not based primarily in the United States, however, or in Europe. Instead, Katherine M. Marino introduces readers to a cast of remarkable Latin American and Caribbean women whose deep friendships and intense rivalries forged global feminism out of an era of imperialism, racism, and fascism. Six dynamic activists form the heart of this story: from Brazil, Bertha Lutz; from Cuba, Ofelia Domíngez Navarro; from Uruguay, Paulina Luisi; from Panama, Clara Gonzoz; from Chile, Marta Vergara; and from the United States, Doris Stevens. This Pan-American network drove a transnational movement that advocated women’s suffrage, equal pay for equal work, maternity rights, and broader self-determination. Their painstaking efforts led to the enshrinement of women’s rights in the United Nations Charter and the development of a framework for international human rights. But their work also revealed deep divides, with Latin American activists overcoming U.S. presumptions to feminist superiority. As Marino shows, these early fractures continue to influence divisions among today’s activists along class, racial, and national lines. Marino’s multinational and multilingual research yields a new narrative for the creation of global feminism. The leading women introduced here were forerunners in understanding the power relations at the heart of international affairs. Their drive to enshrine fundamental rights for women, children, and all people of the world stands as a testament to what can be accomplished when global thinking meets local action.
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Lampert, Sara E. Starring Women. University of Illinois Press, 2020. http://dx.doi.org/10.5622/illinois/9780252043352.001.0001.
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Star actresses and dancers were among the most publicly visible, celebrated, and often polarizing female public figures in the early United States. This book examines the careers and celebrity of the women and girls from Europe and America whose fame drove the growth and transformation of theater between 1790 and 1850 from the Atlantic seaboard to the trans-Appalachian West. Starring women introduced new repertoire—melodramas, breeches roles, dance pantomime and ballet—that catalyzed debates about social ownership of American culture, regional and national identity, and women’s place in public life. This book transforms existing understandings of early U.S. theater and culture by examining a broad cohort of understudied figures and argues that women stars were vital to the development of transatlantic and U.S. entertainment, celebrity culture, and gender ideology. Most significantly, starring women lived and performed the tensions and contradictions of changing nineteenth-century gender roles. As this book demonstrates, even while they achieved unprecedented levels of wealth and prominence through the “starring system,” the patriarchal family structures that governed women’s lives and careers conditioned their participation in the industry. The celebrity culture that expanded from the 1820s demanded that starring women conform to new standards of sentimental domestic femininity, even as the structural realities of their lives defied such standards. Starring women were exceptional figures who mapped the margins of a narrowing white middle-class domestic ideal.
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Quaglia, Lucia. The Politics of Regime Complexity in International Derivatives Regulation. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780198866077.001.0001.
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This book examines the post-crisis international derivatives regulation by bringing together the international relations literature on regime complexity and the international political economy literature on financial regulation. Specifically, it addresses three interconnected questions. What factors drove international standard-setting on derivatives post-crisis? Why did international regime complexity emerge? How was it managed and with what outcomes? Theoretically, this research innovatively combines a state-centric, a transgovernmental and a business-led explanations. Empirically, it examines all the main sets of standards (or elemental regimes) concerning derivatives, namely: trading, clearing, and reporting derivatives; resilience, recovery, and resolution of central counterparties; bank capital requirements for bank exposures to central counterparties and derivatives; margins for derivatives non-centrally cleared. Regime complexity in derivatives ensued from the multi-dimensionality and the interlinkages of the problems to tackle, especially because it was a new policy area without a focal international standard-setter. Overall, the international cooperation that took place in order to promote regulatory precision, stringency, and consistency in the regime complex on derivatives was remarkable, especially considering the large number of policy actors involved (states, private actors, regulators). The main jurisdictions played an important role in managing regime complexity, but their effectiveness was constrained by limited domestic coordination. Networks of regulators facilitated international standard-setting and contributed to managing regime complexity through formal and informal tools. The financial industry, at times, lobbied in favour of less precise and stringent rules, engaging in international ‘venue shopping’; other times, it promoted regulatory harmonization and consistency.
Частини книг з теми "Marine drone"
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Ciaramella, Angelo, Francesco Perrotta, Gerardo Pappone, Pietro Aucelli, Francesco Peluso, and Gaia Mattei. "Environment Object Detection for Marine ARGO Drone by Deep Learning." In Pattern Recognition. ICPR International Workshops and Challenges, 121–29. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-68780-9_12.
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Aburasain, R. Y., E. A. Edirisinghe, and M. Y. Zamim. "A Coarse-to-Fine Multi-class Object Detection in Drone Images Using Convolutional Neural Networks." In Digital Interaction and Machine Intelligence, 12–33. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-11432-8_2.
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AbstractMulti-class object detection has a rapid evolution in the last few years with the rise of deep Convolutional Neural Networks (CNNs) learning based, in particular. However, the success approaches are based on high resolution ground level images and extremely large volume of data as in COCO and VOC datasets. On the other hand, the availability of the drones has been increased in the last few years and hence several new applications have been established. One of such is understanding drone footage by analysing, detecting, recognizing different objects in the covered area. In this study conducted, a collection of large images captured by a drone flying at a fixed altitude in a desert area located within the United Arab Emirates (UAE) is given and it is utilised for training and evaluating the CNN networks to be investigated. Three state-of-the-art CNN architectures, namely SSD-500 with VGGNet-16 meta-architecture, SSD-500 with ResNet meta-architecture and YOLO-V3 with Darknet-53 are optimally configured, re-trained, tested and evaluated for the detection of three different classes of objects in the captured footage, namely, palm trees, group-of-animals/cattle and animal sheds in farms. Our preliminary experiments revealed that YOLO-V3 outperformed SSD-500 with VGGNet-16 by a large margin and has a considerable improvement as compared to using SSD-500 with ResNet. Therefore, it has been selected for further investigation, aiming to propose an efficient coarse-to-fine object detection model for multi-class object detection in drone images. To this end, the impact of changing the activation function of the hidden units and the pooling type in the pooling layer has been investigated in detail. In addition, the impact of tuning the learning rate and the selection of the most effective optimization method for general hyper-parameters tuning is also investigated. The result demonstrated that the multi-class object detector developed has precision of 0.99, a recall of 0.94 and an F-score of 0.96, proving the efficiency of the multi-class object detection network developed.
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Strauss, Johann A. "Economic and yield comparisons of different crop and crop-pasture production systems." In Conservation agriculture in Africa: climate smart agricultural development, 206–14. Wallingford: CABI, 2022. http://dx.doi.org/10.1079/9781789245745.0011.
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Abstract Over the past 15 years the adoption rate of Conservation Agriculture (CA) in southern South Africa has increased at a fast rate, although the adoption of the three pillars of CA was to varying degrees. The adoption of CA happened in the absence of any policy support framework directed to CA. The market drove the adaptation rate with a handful of local producers being the first to adopt no-till (NT) strategies. Long-term field experiments demonstrate that the effects of crop rotation include increased yields from the main wheat crop so that two-thirds of the present total wheat production may be achieved with only half the cropped area under the main crop, and gross margins are better - and dramatically better - with integration of cropping and livestock. This chapter presents an overview of the benefits to yield and economic sustainability of including alternative cash and pasture crops into CA farming systems in the winter rainfall region of southern South Africa.
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Fiorini, M., A. Pennisi, and D. D. Bloisi. "Optical Target Recognition for Drone Ships." In Marine Navigation, 371–75. CRC Press, 2017. http://dx.doi.org/10.1201/9781315099132-47.
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Prodanov, B., I. Kotsev, T. Lambev, L. Dimitrov, R. Bekova, and D. Dechev. "Drone-based geomorphological and landscape mapping of Bolata Cove, Bulgarian coast." In Sustainable Development and Innovations in Marine Technologies, 592–96. CRC Press, 2019. http://dx.doi.org/10.1201/9780367810085-78.
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Hammoud, Bilal, and Norbert Wehn. "Recent Advances in Oil-Spill Monitoring Using Drone-Based Radar Remote Sensing." In Environmental Sciences. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.106942.
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Oil spills are regrettably common and have socioeconomic implications on communities and disastrous consequences on the marine ecosystem and maritime life. The European Space Agency (ESA) has stated that worldwide spillage exceeds 4.5 million tons of oil annually, where 45% of the amount is due to operative discharges from ships. To alleviate the severity of oil spills and promptly react to such incidents, it is crucial to have oil-spill monitoring systems, which enable an effective contingency plan to dictate the best actions for dealing with oil spills. A quick and efficient intervention requires the (1) detection of oil slicks, (2) thickness estimation, and (3) oil classification. The European Maritime Safety Agency (EMSA) highlighted in 2016 the need to use drones as complementary systems supporting satellite maritime surveillance. While multiple sensors could be used, active radars appear to be prominent for oil spill monitoring. In this chapter, we present recent advances in drone-based radar remote sensing as an effective oil spill monitoring system. It shows from the system-level perspective the capability of radar systems on drones, using high spectral resolution and parallel scanning, to perform the above-required functionalities (1, 2, and 3) and provide valuable information to contain the damage.
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Lynch, Michael E. "Winter of Discontent." In Edward M. Almond and the US Army, 226–49. University Press of Kentucky, 2019. http://dx.doi.org/10.5810/kentucky/9780813177984.003.0013.
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Almond was elated when his troops reached the Yalu River in November 1950, but there was trouble on the horizon. Almond used the airplane to move constantly and see units at the front for himself, but this blinded him to certain battlefield realities in North Korea, such as the distances between units. The Chinese launched a counteroffensive in October 1950 that drove the longest retreat in US Army history. The weight of the attack on the X Corps sector fell on the 1st Marine Division and the 7th Infantry Division at the Chosin Reservoir. That has assumed legendary status in Marine Corps history, and figures prominently in the interservice rivalry that sees Almond reviled by all Marines for his alleged anti-Marine bias. This chapter also tells the story of the Hungnam evacuation in which Almond evacuated some 100,000 soldiers and marines and over 100,000 Korean civilians in the face of the oncoming Chinese offensive.
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Wills, David. "Drone Penalty." In Killing Times, 150–84. Fordham University Press, 2019. http://dx.doi.org/10.5422/fordham/9780823283521.003.0006.
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A different appropriation of the instant takes place in the case of extrajudicial killing by drones. That practice by the U.S., begun in 2002, has remained shrouded in secrecy. However one counts the victims, drone executions outnumber by a huge margin American judicial executions, and the drone penalty thus represents a particular paradigm of the American death penalty: for the most part out of sight and out of mind. It raises in turn questions about American democracy and the deadly criminal conduct of its foreign policy, but also produces a perspective that brings into focus the long series of historical relations between slavery and the death penalty, as well as lynching and the persistence of racism in the application of capital punishment. Furthermore, the sovereign secrecy of drone attacks produces a structural space shared by the U.S. president and the terrorist s/he attacks.
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Hawthorne, Nathaniel. "XIII: A Sculptor’s Studio." In The Marble Faun. Oxford University Press, 2008. http://dx.doi.org/10.1093/owc/9780199554072.003.0015.
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About this period, Miriam seems to have been goaded by a weary restlessness, that drove her abroad on any errand or none. She went, one morning, to visit Kenyon in his studio, whither he had invited her to see a new statue, on which...
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Callahan, Dan. "The Wrong Man, Vertigo, North by Northwest, Psycho, The Birds, Marnie." In The Camera Lies, 190–229. Oxford University Press, 2020. http://dx.doi.org/10.1093/oso/9780197515327.003.0014.
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In the six masterpieces in a row that Hitchcock made from 1957 to 1964, the Master drew extraordinary work from every actor in his casts. He carefully molded the performance of Vera Miles as a wife who succumbs to depression in The Wrong Man (1957), rehearsing with her over and over again so that the scale of her work would be exactly right, and he let Henry Fonda “do nothing” in this picture in a super-controlled way that ranks with Judith Anderson’s Mrs. Danvers in Rebecca for ambiguous expressiveness under a tightly unyielding surface. Kim Novak gave perhaps the ultimate tensile and contrasting Hitchcockian performance in a dual role in Vertigo, and Novak was matched in that film by James Stewart and Barbara Bel Geddes, both of whom cleanly plumbed the deep pain of their respective characters. Hitchcock worked one more time with Cary Grant for North by Northwest (1959) and brought the Grant persona to its latter-day apotheosis, especially in the love scenes with a somber and very carnal Eva Marie Saint. The Master patiently and closely directed Janet Leigh in Psycho, even sitting off camera and reading the lines her character Marion Crane was supposed to be thinking as she drove to her doom at the Bates Motel. And then Hitchcock controlled the work of Tippi Hedren in The Birds and Marnie, and they both achieved his ideal of maximum expressiveness with minimal means before he crossed a line off screen and their working relationship deteriorated.
Тези доповідей конференцій з теми "Marine drone"
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Fiorini, M., A. Pennisi, and D. Bloisi. "Optical Target Recognition for Drone Ships." In The International Conference on Marine Navigation and Safety of Sea Transportation (TRANSNAV 2017). Taylor & Francis Group, 6000 Broken Sound Parkway NW, Suite 300, Boca Raton, FL 33487-2742: CRC Press, 2017. http://dx.doi.org/10.1201/9781315099132-64.
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Carter, T. G., A. Begin, J. P. Dittrich, R. Gillinder, L. F. Brewster, C. Evans, J. L. Carvalho, N. Solis, R. Arthur, and D. Williamson. "Innovative Use of Drone Technology & 3D Numerical Modelling for Cliff Stability Evaluation." In ICE Coasts, Marine Structures and Breakwaters. ICE Publishing, 2018. http://dx.doi.org/10.1680/cmsb.63174.0267.
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Dinelli, Christopher, Jarod Fisher, Brenden Herkenhoff, and Mostafa Hassanalian. "Design of a Hybrid Detachable Amphibious Drone for Monitoring Marine Environment." In AIAA Propulsion and Energy 2020 Forum. Reston, Virginia: American Institute of Aeronautics and Astronautics, 2020. http://dx.doi.org/10.2514/6.2020-3965.
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Syahnur, Y. "Implementation of Saka Drone Solution (Case Study: National Marine Pollution Exercise 2018)." In Indonesian Petroleum Association 42nd Annual Convention and Exhibition. Indonesian Petroleum Association, 2018. http://dx.doi.org/10.29118/ipa19.o.362.
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Zaw, Zaw Oo, Viet Phuong Bui, and Ching Eng Png. "Efficient wireless link modeling for marine drone application under harsh offshore environment." In 2017 XXXIInd General Assembly and Scientific Symposium of the International Union of Radio Science (URSI GASS). IEEE, 2017. http://dx.doi.org/10.23919/ursigass.2017.8105374.
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Saqib, Muhammad, Sultan Daud Khan, Nabin Sharma, Paul Scully-Power, Paul Butcher, Andrew Colefax, and Michael Blumenstein. "Real-Time Drone Surveillance and Population Estimation of Marine Animals from Aerial Imagery." In 2018 International Conference on Image and Vision Computing New Zealand (IVCNZ). IEEE, 2018. http://dx.doi.org/10.1109/ivcnz.2018.8634661.
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Jeannin, Antoine, Rodrigo Vieira Camara de Castro, Jonathan Peter, and Sebastien de Tessieres. "Enhanced Use of Digital Solutions to Enable New Health Care Services on Calm Buoys." In Offshore Technology Conference. OTC, 2021. http://dx.doi.org/10.4043/31126-ms.
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Summary Offshore fields present a growing need to guarantee safety and productivity while minimizing operational costs and increasing remote assistance. Brownfields are more exposed to risks due to the presence of aged assets requiring in depth inspections to assess potential life extensions. This challenge was tackled with a comprehensive approach to asset integrity management based on the enhanced use of digital solutions to enable new health care services on offshore assets, like CALM Buoys. In line with the recent Oil & Gas industry trends, new digital technologies have been recently developed and deployed on board our fleet of CALM (Catenary Anchor Leg Mooring) Buoys, such as the 3C Telemetry system, Inspection Tablets, the IDEA Web Portal and the Marine Drone. All these new digital solutions will be presented in the proposed paper concerning their technical capabilities and the overall integrity performance improvements achieved with their enhanced use on offshore assets. The 3C Telemetry system converts and upgrades CALM Buoys into smart, internet-friendly offloading terminals, connecting the system to Cloud services and ensuring secured data transmission, treatment, storage, and privacy, while delivering reliable accurate information to operators anywhere in the world. Inspection tablets are used to optimize health check campaigns on Buoys with a real-time and remote back office engineering support. These systems can also be connected to the IDEA (Imodco Digital Experience Access) Web Portal to allow online data visualization and analysis of the mooring systems performance. "The Marine Drone is an unmanned survey vehicle to perform diverless UWILD (Underwater Inspection in Lieu of Dry-docking). The system can perform in depth visual inspections with its ROV (Remotely Operated Vehicle) and high-resolution subsea layout mapping of CALM buoys’ structures with its 3D bathymetry system, all providing high quality digital data post processed by advanced analytical tools for integrity analysis and preventive maintenance planning" (Castro, R., et al. 2020). Data management has become the most valuable asset for companies seeking to have a better understanding and to continuously improve operations. This paper will demonstrate how Buoys and passive (process wise) equipment, like Turrets, can be operated in new ways: 1. Connected Asset (IoT): 3C Telemetry, Tablets, and the Marine Drone. 2. Platform to share/connect data to algorithms/users: IDEA System. 3. New operating business models enabled by health care approach.
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Raimondi, F. M., M. Trapanese, V. Franzitta, and V. Di Dio. "Identification of the inertial model for innovative semi-immergible USV (SI-USV) drone for marine and lakes operations." In OCEANS 2015 - MTS/IEEE Washington. IEEE, 2015. http://dx.doi.org/10.23919/oceans.2015.7404555.
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Luo, Jing, You Wang, Zhao Xinyu, and Jiatai Zhang. "A new conceptual design for subsea charging station." In 13th International Conference on Applied Human Factors and Ergonomics (AHFE 2022). AHFE International, 2022. http://dx.doi.org/10.54941/ahfe1002516.
Повний текст джерелаАнотація:
With deepening ocean development , a larger scale Internet of Underwater Things (IoUT) is being realized[1].More and more underwater equipment is being deployed, various ocean monitoring equipment, underwater robots and underwater group sites amongst others, all of which will be working in the deep sea for long periods of time in the foreseeable future[2].Due to the increasing working time and power consumption, it has become difficult for the high energy batteries carried by these facilities to cover their energy needs [3]. Therefore, it is necessary to solve the problem of electrical energy replenishment for underwater equipment.Based on Equinor’s Underwater Intervention Drone (UID) standard interface definition, Blue Logic have produced the world's first three universal, open-standard subsea drone docking stations.But this is not perfect, in the face of deeper waters, more complex multi-shape deep sea equipment charging needs, the current program is not enough to solve[4].Therefore, based on the IoUT scenario positioning, this research designs a subsea charging station that can serve multiple devices.The concept is similar to a land-based collection station for power banks, providing multiple sub-charging equipment that can be carried on the move to charge multiple subsea equipments of different types simultaneously.It also uses ocean energy to provide in-situ produced electricity for the underwater charging base station .Compared to Blue Logic's Subsea Drone Docking Station (SDS), it enables the multi-device charging needs of the IoUT using ultrasonic technology[5,6].In the long term, the combination of existing equipment will greatly reduce the cost of regional subsea long-term exploration and expand the scope of exploration[7].The paper will solve the following problems:1) How to solve the charging problem of long-distance survey of underwater equipments（e.g. AUV）?2) How to make the design applicable to charging usage scenarios common to different types, forms and sizes of underwater equipments?3) How to design underwater charging energy transmission more efficiently and sustainably?The research approach composed following parts:- Through literature research, sort out the development status of technical equipment such as underwater charging, underwater docking, underwater information transmission and marine power generation.- A structure interview with the opinions of deep-sea equipment designers and researchers to clarify the design requirements. - Analyze product features and problems and summarize the design process and direction through brainstorming method and solution building method.The design of the underwater multi-port charging base station solves the energy problem of deep-sea long-term survey equipment, with poor energy sustainability and low charging efficiency.This approach will enable true continuous subsea operations in extremely dynamic ocean environments.Although the project is still a conceptual design and various sensors are still being experimented with, it is forward-looking and instructive for future applications.References1.Wang X., Lu J., Peng W., &Song L.,(2021) Accelerating the construction of marine "new infrastructure" and promoting high-quality development of marine industry,Science & Technology Review,39(16),pp.76-80.2.Qu, Feng-Chong, Lai. , Liu, J.-Z., Tu, X.-B., Jiang, Y.,(2021)'Research and Application of Key Technologies for Marine Internet of Things', Telecommunications Science, 37, (7), pp. 25-33.3.Tian Y., Yuan R.,&Li X.,(2018)'Design and experiment of deep-sea microcurrent power generation system', Acta Energiae Solaris Sinica,Journal of China Academy of Electronics and Information Technology, 39, (4), pp. 873-878.4.SubseaDockingStation(SDS).[Online].Available:https://www.bluelogic.no/news-and-media/subsea-docking-station-sds-.5.Abicht, D., Torvestad, J.C., Solheimsnes, P.A., and Stenevik, K.A., ‘Underwater Intervention Drone Subsea Control System’, in Proceedings of the OTC, 2020.6.Wang Y., &Tian F.,(2019)'Research on acoustic wave-based charging planning in underwater sensing networks',Journal of China Academy of Electronics and Information Technology,14(11),pp.1183-11877.Cruz, N.A., Matos, A.C., Almeida, R.M., and Ferreira, B.M.: ‘A lightweight docking station for a hovering AUV’, in Proceedings of the IEEE, 2017, pp. 1-7.
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Raimondi, F. M., M. Trapanese, V. Franzitta, A. Viola, and A. Colucci. "A innovative semi-immergible USV (SI-USV) drone for marine and lakes operations with instrumental telemetry and acoustic data acquisition capability." In OCEANS 2015 - Genova. IEEE, 2015. http://dx.doi.org/10.1109/oceans-genova.2015.7271595.
Повний текст джерелаЗвіти організацій з теми "Marine drone"
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Sol Milne, Sol Milne. Using drones to find ghost gear in Koh Phangan, Thailand & study the impacts on marine megafauna. Experiment, November 2022. http://dx.doi.org/10.18258/31056.
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Walsh, Alex. The Contentious Politics of Tunisia’s Natural Resource Management and the Prospects of the Renewable Energy Transition. Institute of Development Studies (IDS), February 2021. http://dx.doi.org/10.19088/k4d.2021.048.
Повний текст джерелаАнотація:
For many decades in Tunisia, there has been a robust link between natural resource management and contentious national and local politics. These disputes manifest in the form of protests, sit-ins, the disruption of production and distribution and legal suits on the one hand, and corporate and government response using coercive and concessionary measures on the other. Residents of resource-rich areas and their allies protest the inequitable distribution of their local natural wealth and the degradation of their health, land, water, soil and air. They contest a dynamic that tends to bring greater benefit to Tunisia’s coastal metropolitan areas. Natural resource exploitation is also a source of livelihoods and the contentious politics around them have, at times, led to somewhat more equitable relationships. The most important actors in these contentious politics include citizens, activists, local NGOs, local and national government, international commercial interests, international NGOs and multilateral organisations. These politics fit into wider and very longstanding patterns of wealth distribution in Tunisia and were part of the popular alienation that drove the uprising of 2011. In many ways, the dynamic of the contentious politics is fundamentally unchanged since prior to the uprising and protests have taken place within the same month of writing of this paper. Looking onto this scene, commentators use the frame of margins versus centre (‘marginalization’), and also apply the lens of labour versus capital. If this latter lens is applied, not only is there continuity from prior to 2011, there is continuity with the colonial era when natural resource extraction was first industrialised and internationalised. In these ways, the management of Tunisia’s natural wealth is a significant part of the country’s serious political and economic challenges, making it a major factor in the street politics unfolding at the time of writing.