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Comparative Analysis of Environmental Contour Approaches to Estimating Extreme Waves for Offshore Installations for the Baltic Sea and the North Sea J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-18 Linus Wrang; Eirini Katsidoniotaki; Erik Nilsson; Anna Rutgersson; Jesper Rydén; Malin Göteman
At the stage of design load analysis for offshore installations such as wave energy systems, a critical step is the determination of environmental cases to be evaluated for the definition of the characteristic design load. A commonly used methodology for load case selection, applied in multiple studies and recommended by technical specifications and guidelines, is the environmental contour approach
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Visual Appearance of Oil on the Sea J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-18 Merv Fingas
The visual appearance of oil spills at sea is often used as an indicator of spilled oil properties, state and slick thickness. These appearances and the oil properties that are associated with them are reviewed in this paper. The appearance of oil spills is an estimator of thickness of thin oil slicks, thinner than a rainbow sheen (<3 µm). Rainbow sheens have a strong physical explanation. Thicker
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Microplastics in Mediterranean Coastal Countries: A Recent Overview J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-18 Georgios Fytianos; Efthimia Ioannidou; Anna Thysiadou; Athanasios C. Mitropoulos; George Z. Kyzas
The aim of this paper is to present information gathered from studies regarding the current status and challenges of microplastics (MPs) in Mediterranean coastal counties. MPs are considered emerging pollutants, and their effect on fish and on the final consumer through the trophic food chain are of great concern. Studies from almost all of the Mediterranean coastal countries are gathered and discussed
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New Marine Geoheritage from the Russian Altai J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-16 Jaroslav M. Gutak; Dmitry A. Ruban; Natalia N. Yashalova
Marine geoheritage comprises unique geological features of modern and ancient seas and oceans. The Russian Altai (southern Siberia) is a vast and geologically rich area, which was covered by a marginal sea of the Panthalassa Ocean in the Devonian. New geosites representing shallow- and deep-marine depositional environments and palaeoecosystems of submarine volcano slopes are proposed, namely, Melnichnye
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Analysis and Trends of Global Research on Nautical, Maritime and Marine Tourism J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-17 Rosa María Martínez Vázquez; Juan Milán García; Jaime De Pablo Valenciano
Tourism related to the sea and boating activities is becoming increasingly popular and revolves around a range of leisure, water sports, nautical or other maritime activities. This article studies the main scientific contributions in this area, bearing in mind the complexity of finding a suitable definition of this concept. Hence, the aim of this paper is to analyze the scientific production from 1986
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Hydrodynamic Efficiency of a Wave Energy Converter in Front of an Orthogonal Breakwater J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-17 Dimitrios N. Konispoliatis; Spyridon A. Mavrakos
In the present study, the hydrodynamic efficiency of a cylindrical wave energy converter (WEC) of vertical symmetry axis and arranged in front of a reflecting orthogonal breakwater is explored. The idea is based on exploiting the anticipated amplification of the scattered and the reflected wave fields originating from the presence of the vertical walls, towards increasing the WEC’s wave power absorption
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Evolution Process of Liquefied Natural Gas from Stratification to Rollover in Tanks of Coastal Engineering with the Influence of Baffle Structure J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-17 Zhe Wang; Fenghui Han; Yuxiang Liu; Wenhua Li
During the storage process, liquefied natural gas (LNG) may undergo severe evaporation, stratification, and rollover in large storage tanks due to heat leakage, aging, or charging, causing major safety risks. Therefore, this article theoretically analyzes the causes and inducing factors of the LNG stratification and rollover phenomenon in the storage tank of coastal engineering. The computational fluid
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Preventive Maintenance of a k-out-of-n System with Applications in Subsea Pipeline Monitoring J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-15 Vladimir Rykov; Olga Kochueva; Mais Farkhadov
Environmental safety issues are of particular importance when we design and operate underwater transport systems. To ensure the transport systems function safely, special systems to monitor their condition are being created. Underwater pipeline monitoring systems should continuously operate to detect and prevent emergency and pre-emergency situations in a timely manner. The purpose of this article
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Hydrodynamic Analysis and Motions of Ship with Forward Speed via a Three-Dimensional Time-Domain Panel Method J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-15 Peng Zhang; Teng Zhang; Xin Wang
A new three-dimensional (3D) time-domain panel method is developed to solve the ship hydrodynamic problem and motions. For an advancing ship with a constant forward speed in regular waves, the ship’s hull can be discretized and processed into a number of quadrilateral panels. Based on Green’s theorem, an analytical expression for Froude–Krylov (F-K) forces evaluation on the quadrilateral panels is
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On the Tidal Prism: The Roles of Basin Extension, Bottom Friction and Inlet Cross-Section J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-15 Marco Petti; Sara Pascolo; Silvia Bosa; Nadia Busetto
The prism of the Lignano tidal inlet was approximately constant over the last forty years, although the section width has halved. This has led to questions concerning the factors that most influence the tidal prism, and on the applicability of the well-known A–P relationship. A conceptual scheme of the sea–channel–lagoon system has been used to perform a sensitivity analysis of different parameters
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L2-Gain Based Adaptive Robust Heel/Roll Reduction Control Using Fin Stabilizer during Ship Turns J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-15 Zhang Songtao; Zhao Peng
The rolling and heeling experienced by a ship during turning will be more severe under the interference of winds and waves, which will seriously affect the navigation safety of the ship. The fin stabilizer is currently the best active anti-rolling device, which is usually used to reduce the roll of the ship during straight-line sailing. The purpose of this work is to study the use of fin stabilizers
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Simulating Destructive and Constructive Morphodynamic Processes in Steep Beaches J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-15 Katerina Kombiadou; Susana Costas; Dano Roelvink
Short-term beach morphodynamics are typically modelled solely through storm-induced erosion, disregarding post-storm recovery. Yet, the full cycle of beach profile response is critical to simulating and understanding morphodynamics over longer temporal scales. The XBeach model is calibrated using topographic profiles from a reflective beach (Faro Beach, in S. Portugal) during and after the incidence
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Study on Reactive Power Compensation Strategies for Long Distance Submarine Cables Considering Electrothermal Coordination J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-15 Gang Liu; Mingming Fan; Pengyu Wang; Ming Zheng
Long-distance high voltage alternating current (AC) submarine cables are widely used to connect offshore wind farms and land power grids. However, the transmission capacity of the submarine cable is limited by the capacitive charging current. This paper analyzes the impacts of reactive power compensation in different positions on the current distribution on long-distance submarine cable transmission
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Modeling Dynamic Processes of Mondego Estuary and Óbidos Lagoon Using Delft3D J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-15 Joana Mendes; Rui Ruela; Ana Picado; João Pedro Pinheiro; Américo Soares Ribeiro; Humberto Pereira; João Miguel Dias
Estuarine systems currently face increasing pressure due to population growth, rapid economic development, and the effect of climate change, which threatens the deterioration of their water quality. This study uses an open-source model of high transferability (Delft3D), to investigate the physics and water quality dynamics, spatial variability, and interrelation of two estuarine systems of the Portuguese
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Study on the Rheological Behavior of a Model Clay Sediment J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-14 Yuan Lin; Huaitao Qin; Jin Guo; Jiawang Chen
Clay sediments are the main component of seabed sediment. Interactions between the nano-sized, disk-shaped and charged clay particles are complicated, as they control the sediment’s rheology. In this study, we studied the rheological behavior of the clay sediment modeled by laponite and bentonite suspensions experimentally using a rotational rheometer. The yield stress decreased when water content
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Experimental Assessment of a Conducting Polymer (PEDOT) and Microbial Biofilms as Deterrents and Facilitators of Macro-Biofouling: Larval Settlement of the Barnacle Notobalanus flosculus (Darwin, 1854) from Central Chile J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-14 Simone Baldanzi; Ignacio T. Vargas; Francisco Armijo; Miriam Fernández; Sergio A. Navarrete
Maritime enterprises have long sought solutions to reduce the negative consequences of the settlement and growth of marine biofouling (micro- and macro-organisms) on virtually all surfaces and materials deployed at sea. The development of biofouling control strategies requires solutions that are cost-effective and environmentally friendly. Polymer-based coatings, such as the poly (3,4-ethylenedioxythiophene)
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Storm Tide and Wave Simulations and Assessment J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-14 Shih-Chun Hsiao; Wen-Son Chiang; Wei-Bo Chen
Note: In lieu of an abstract, this is an excerpt from the first page. Storm tides, surges, and waves associated with typhoons/tropical cyclones/hurricanes are among the most severe threats to coastal zones, nearshore waters, and navigational safety [...]
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A Comparative Study of Computational Methods for Wave-Induced Motions and Loads J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-14 Jens Ley; Ould el Moctar
Ship hull structural damages are often caused by extreme wave-induced loads. Reliable load predictions are required to minimize the risk of structural failures. One conceivable approach relies on direct computations of extreme events with appropriate numerical methods. In this perspective, we present a systematic study comparing results obtained with different computational methods for wave-induced
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An Ecological Risk Assessment of Sediments in a Developing Environment—Batticaloa Lagoon, Sri Lanka J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Madurya Adikaram; Amarasooriya Pitawala; Hiroaki Ishiga; Daham Jayawardana; Carla M. Eichler
The land-sea interface is considered as a threatening environment due to anthropogenic development activities. Unplanned developments can cause effects on important ecosystems, water and human health as well. In this study, the influence of rapid regional development on the accumulation of trace elements to the sediments of an important ecosystem, Batticaloa lagoon, Sri Lanka was examined. Surface
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Social, Economic and Environmental Sustainability of Port Regions: MCDM Approach in Composite Index Creation J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Jelena J. Stanković; Ivana Marjanović; Jason Papathanasiou; Saša Drezgić
Maritime transport and ports are among the most important linkages between global economies, handling more than 90% of internationally traded goods. Economic importance of maritime transport imposes significant implications on the social and environmental performance of port regions. The paper aims to create composite indices as relevant, scientific-based tools used in comparing and monitoring various
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Development and Validation of Quasi-Eulerian Mean Three-Dimensional Equations of Motion Using the Generalized Lagrangian Mean Method J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Duoc Tan Nguyen; Niels G. Jacobsen; Dano Roelvink
This study aims at developing a new set of equations of mean motion in the presence of surface waves, which is practically applicable from deep water to the coastal zone, estuaries, and outflow areas. The generalized Lagrangian mean (GLM) method is employed to derive a set of quasi-Eulerian mean three-dimensional equations of motion, where effects of the waves are included through source terms. The
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Verification and Validation of CFD Based Form Factors as a Combined CFD/EFD Method J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Kadir Burak Korkmaz; Sofia Werner; Rickard Bensow
Predicting the propulsive power of ships with high accuracy still remains a challenge. Well established practices in the 1978 ITTC Power Prediction method have been questioned such as the form factor approach and its determination method. This paper investigates the possibility to improve the power predictions by the introduction of a combined CFD/EFD Method where the experimental determination of
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Radioactivity Monitoring at North Aegean Sea Integrating In-Situ Sensor in an Ocean Observing Platform J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Christos Tsabaris; Effrossyni G. Androulakaki; Dionysios Ballas; Stylianos Alexakis; Leonidas Perivoliotis; Athanasia Iona
The integration of the radioactivity spectrometer KATERINA II in a fixed station (buoy) of the POSEIDON network at the North Aegean Sea within the framework of MARRE Project is presented. The acquisition period lasted from 20 November 2019 till 22 February 2020. An intense increment of the activity concentration of radon progenies (up to an order of magnitude) was recorded during rainfall. More specifically
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Acoustic Presence of Dolphins through Whistles Detection in Mediterranean Shallow Waters J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Martina Gregorietti; Elena Papale; Maria Ceraulo; Clarissa de Vita; Daniela Silvia Pace; Giorgio Tranchida; Salvatore Mazzola; Giuseppa Buscaino
The evaluation of acoustic temporal rhythms in wide-ranging cetaceans can reveal patterns in animal spatial presence and the occurrence of periodical phenomena. Here, we aimed at assessing the temporal patterns of dolphin’s acoustic presence in a shallow-water area in the Sicily Strait (Mediterranean Sea). Whistles were collected continuously for 14 months from an acoustic monitoring station installed
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ROV Navigation in a Fish Cage with Laser-Camera Triangulation J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Magnus Bjerkeng; Trine Kirkhus; Walter Caharija; Jens T. Thielemann; Herman B. Amundsen; Sveinung Johan Ohrem; Esten Ingar Grøtli
Aquaculture net cage inspection and maintenance is a central issue in fish farming. Inspection using autonomous underwater vehicles is a promising solution. This paper proposes laser-camera triangulation for pose estimation to enable autonomous net following for an autonomous vehicle. The laser triangulation 3D data is experimentally compared to a doppler velocity log (DVL) in an active fish farm.
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Improvement of the Welding Process for Fillet Air Test for the Biggest Taiwan Shipyard J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-13 Chia-Nan Wang; Ming-Hsien Hsueh; Chao-Jung Lai; Chen-Fa Wang; Shi-Hao Wang
During ship block construction, watertight bulkheads weld of every cabin of ships need to undergo stress testing according to the tanks’ test plan. Every incomplete bulkhead cannot be sprayed in order to protect them after sandblasting; this seriously affects the process of construction. Therefore, the issue of this study is to maintain the integrity of the painting quality and reduce the destruction
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Prediction of Jacking Force in Vertical Tunneling Projects Based on Neuro-Genetic Models J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-12 Xin-Jiang Wei; Xiao Wang; Gang Wei; Cheng-Wei Zhu; Yu Shi
The vertical tunneling method is an emerging technique to build sewage inlets or outlets in constructed horizontal tunnels. The jacking force used to drive the standpipes upward is an essential factor during the construction process. This study aims to predict the jacking forces during the vertical tunneling construction process through two intelligence systems, namely, artificial neural networks (ANNs)
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Coastal Sensitivity/Vulnerability Characterization and Adaptation Strategies: A Review J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-12 Giorgio Anfuso; Matteo Postacchini; Diana Di Luccio; Guido Benassai
Coastal area constitutes a vulnerable environment and requires special attention to preserve ecosystems and human activities therein. To this aim, many studies have been devoted both in past and recent years to analyzing the main factors affecting coastal vulnerability and susceptibility. Among the most used approaches, the Coastal Vulnerability Index (CVI) accounts for all relevant variables that
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New Advances in Marine Engineering Geology J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-11 Xiaolei Liu; Qing Yang; Yin Wang; Dong-Sheng Jeng; Hendrik Sturm
Note: In lieu of an abstract, this is an excerpt from the first page. The ocean is the cradle of life and is rich in natural resources [...]
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Stochastic Uncertainty in a Dam-Break Experiment with Varying Gate Speeds J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-11 Hiroshi Takagi; Fumitaka Furukawa
Uncertainties inherent in gate-opening speeds are rarely studied in dam-break flow experiments due to the laborious experimental procedures required. For the stochastic analysis of these mechanisms, this study involved 290 flow tests performed in a dam-break flume via varying gate speeds between 0.20 and 2.50 m/s; four pressure sensors embedded in the flume bed recorded high-frequency bottom pressures
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The Tsunami Caused by the 30 October 2020 Samos (Aegean Sea) Mw7.0 Earthquake: Hydrodynamic Features, Source Properties and Impact Assessment from Post-Event Field Survey and Video Records J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-11 Ioanna Triantafyllou; Marilia Gogou; Spyridon Mavroulis; Efthymios Lekkas; Gerassimos A. Papadopoulos; Manolis Thravalos
The tsunami generated by the offshore Samos Island earthquake (Mw = 7.0, 30 October 2020) is the largest in the Aegean Sea since 1956 CE. Our study was based on field surveys, video records, eyewitness accounts and far-field mareograms. Sea recession was the leading motion in most sites implying wave generation from seismic dislocation. At an epicentral distance of ~12 km (site K4, north Samos), sea
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Model-Based Safety Analysis and Design Enhancement of a Marine LNG Fuel Feeding System J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-11 Konstantinos Milioulis; Victor Bolbot; Gerasimos Theotokatos
Recent regulatory requirements for shipping emissions control have led to the adoption of Liquefied Natural Gas (LNG) as a marine fuel and the design of LNG-fuelled vessels. Considering the potential safety implications due to system failure/unavailability, this study aims at the safety analysis of a low-pressure LNG fuel feeding system using a novel model-based methodology. The proposed methodology
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Eliminate the Queuing Time in the New Suez Canal: Predicting Adjustment on Ships’ Arrival Time under Optimal Non-Queuing Toll Scheme J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-11 Pey-Yuan Sun; Chen-Hsiu Laih
In 2016, the construction of the New Suez Canal was completed, enabling most large-size vessels to pass through and causing more ships to queue into the canal. As the queueing problem at the entrance of the canal was anticipated to be serious, an optimal non-queueing toll scheme was previously established to eliminate the queueing phenomenon at the anchorage of the canal. However, no information about
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Sea State Monitoring by Ship Motion Measurements Onboard a Research Ship in the Antarctic Waters J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-09 Silvia Pennino; Antonio Angrisano; Vincenzo Della Corte; Giampaolo Ferraioli; Salvatore Gaglione; Anna Innac; Elena Martellato; Pasquale Palumbo; Vincenzo Piscopo; Alessandra Rotundi; Antonio Scamardella
A parametric wave spectrum resembling procedure is applied to detect the sea state parameters, namely the wave peak period and significant wave height, based on the measurement and analysis of the heave and pitch motions of a vessel in a seaway, recorded by a smartphone located onboard the ship. The measurement system makes it possible to determine the heave and pitch acceleration spectra of the reference
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Oil Spill Detection Using LBP Feature and K-Means Clustering in Shipborne Radar Image J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-10 Jin Xu; Xinxiang Pan; Baozhu Jia; Xuerui Wu; Peng Liu; Bo Li
Oil spill accidents have seriously harmed the marine environment. Effective oil spill monitoring can provide strong scientific and technological support for emergency response of law enforcement departments. Shipborne radar can be used to monitor oil spills immediately after the accident. In this paper, the original shipborne radar image collected by the teaching-practice ship Yukun of Dalian Maritime
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Comparison between Model Test and Three CFD Studies for a Benchmark Container Ship J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-08 Ana-Maria Chiroșcă; Liliana Rusu
An alternative to experiments is the use of numerical model tests, where the performances of ships can be evaluated entirely by computer simulations. In this paper, the free surface viscous flow around a bare hull model is simulated with three Computational Fluid Dynamics (CFD) software packages (FINE Marine, ANSYS CFD and SHIPFLOW) and compared to the results obtained during the experimental tests
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Buoyant Jets in Cross-Flows: Review, Developments, and Applications J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-08 Mostafa Taherian; Abdolmajid Mohammadian
Significant environmental effects from the use of marine outfall discharges have led to increased efforts by both regulatory bodies and research groups to minimize the negative impacts of discharges on the receiving water bodies. Understanding the characteristics of discharges under conditions representative of marine environments can enhance the management of discharges and mitigate the adverse impacts
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Model Uncertainty for Settlement Prediction on Axially Loaded Piles in Hydraulic Fill Built in Marine Environment J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-08 Manuel Bueno Aguado; Félix Escolano Sánchez; Eugenio Sanz Pérez
Model uncertainty is present in many engineering problems but particularly in those involving geotechnical behavior of pile foundation. A wide range of soil conditions together with simplified numerical models makes it a constant necessity to review the accuracy of the predictions. In this paper, the outputs of some seventy (70) pile axially-loaded tests have been reviewed with a classic numerical
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Coupled Engine-Propeller Selection Procedure to Minimize Fuel Consumption at a Specified Speed J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-07 Mina Tadros; Roberto Vettor; Manuel Ventura; Carlos Guedes Soares
This study presents a practical optimization procedure that couples the NavCad power prediction tool and a nonlinear optimizer integrated into the Matlab environment. This developed model aims at selecting a propeller at the engine operating point with minimum fuel consumption for different ship speeds in calm water condition. The procedure takes into account both the efficiency of the propeller and
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ROMS Based Hydrodynamic Modelling Focusing on the Belgian Part of the Southern North Sea J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-07 Georgios Klonaris; Frans Van Eeden; Jeffrey Verbeurgt; Peter Troch; Denis Constales; Hans Poppe; Alain De Wulf
The North Sea is a shallow sea that forms a complex physical system. The nonlinear interaction of the astronomical tides, varying wind fields and varying pressure systems requires appropriate approaches to be described accurately. An application based on the advanced numerical model Regional Ocean Modeling System (ROMS) was newly developed by the authors, tailored to simulate these hydrodynamic processes
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A Comparison of Decimeter Scale Variations of Physical and Photobiological Parameters in a Late Winter First-Year Sea Ice in Southwest Greenland J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-07 Lars Chresten Lund-Hansen; Clara Marie Petersen; Dorte Haubjerg Søgaard; Brian Keith Sorrell
Small-scale variation in the physical and biological properties of sea ice was examined by collecting nine sea ice cores within 1 m2 in a land-fast first-year ice in southwest Greenland in late winter. Cores were sectioned in four segments and sea ice physical, biological, and photobiological parameters were measured. The main purpose was to explore the decimeter-scale horizontal and vertical variations
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Buoyancy Regulation Strategy for Underwater Profiler Based on Adaptive Genetic Algorithm J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-06 Hui Zhi; Puzhe Zhou; Yanhu Chen; Xiaoyan Zhao; Yuandong Hong; Mingwei Lin; Canjun Yang
Considering the energy limitations of underwater vehicles, a strategy for energy saving is proposed. In the proposed buoyancy regulation strategy, oil of the buoyancy regulation system is pumped out several times at different depths instead of all at once. A balance between energy and time is achieved by assigning suitable weights, and the optimised depth which can be obtained from the pressure sensor
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The Submarine Habitability Assessment Questionnaire: A Survey of RAN Submariners J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-06 Kate Ponton; Dion Parera; Jessica Irons
This paper reports on the development, method, and major findings from the Submarine Habitability Assessment Questionnaire (SUB-HAQ) undertaken as part of a lessons-learned review of the current RAN submarine platform. The questionnaire was completed by 167 Royal Australian Navy (RAN) Submariners and was developed to examine the perceived habitability of the main living and working areas. The results
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Influence of the Spatial Pressure Distribution of Breaking Wave Loading on the Dynamic Response of Wolf Rock Lighthouse J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-06 Darshana T. Dassanayake; Alessandro Antonini; Athanasios Pappas; Alison Raby; James Mark William Brownjohn; Dina D’Ayala
The survivability analysis of offshore rock lighthouses requires several assumptions of the pressure distribution due to the breaking wave loading (Raby et al. (2019), Antonini et al. (2019). Due to the peculiar bathymetries and topographies of rock pinnacles, there is no dedicated formula to properly quantify the loads induced by the breaking waves on offshore rock lighthouses. Wienke’s formula (Wienke
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Non-Linear Motion Characteristics of a Shallow Draft Cylindrical Barge Type Floater for a FOWT in Waves J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-06 Hideyuki Suzuki; Yuta Sakai; Yasuo Yoshimura; Hidetaka Houtani; Lucas H. S. Carmo; Haruki Yoshimoto; Ken Kamizawa; Rodolfo T. Gonçalves
A shallow draft cylindrical barge type floater with footing close to the water surface was experimentally evaluated in waves to investigate non-linear motion characteristics. The floater was designed to be used as an option for FOWT—floating offshore wind turbines. The non-linear mechanism can be promoted due to the viscous force that acts on the footing edges and the footing interaction with the free
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Case Study on the User Interface of GPS Plotters to Enhance Their Usability J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-06 Jaewon Kim; Seojeong Lee; Min Jung
In 2019, the International Maritime Organization (IMO) prescribed guidelines to standardize the user interface (UI) of navigation equipment such as radio detection and ranging (RADAR) and the electronic chart display and information system (ECDIS), which mandate the unification of various terminologies and icons to improve usability. However, comprehensive studies on the operability and standardization
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Transfer Learning for Prognostics and Health Management (PHM) of Marine Air Compressors J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-04 Magnus Gribbestad; Muhammad Umair Hassan; Ibrahim A. Hameed
Prognostics is an engineering discipline focused on predicting the time at which a system or a component will no longer perform its intended function. Due to the requirements of system safety and reliability, the correct diagnosis or prognosis of abnormal condition plays a vital role in the maintenance of industrial systems. It is expected that new requirements in regard to autonomous ships will push
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Satellite-Based Monitoring of Annual Coastal Reclamation in Shenzhen and Hong Kong since the 21st Century: A Comparative Study J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-05 Tanxin Feng; Nan Xu
To solve the shortage of land resources, many coastal cities have implemented coastal reclamation projects over the past few decades. Coastal reclamation can promote the economic development of coastal cities and improve human well-being in coastal zones. However, it can inevitably cause a series of ecological and environmental issues, such as coastal water pollution, ecosystem destruction, habitat
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Vessel Multi-Parametric Collision Avoidance Decision Model: Fuzzy Approach J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-05 Tanja Brcko; Andrej Androjna; Jure Srše; Renata Boć
The application of fuzzy logic is an effective approach to a variety of circumstances, including solutions to maritime anti-collision problems. The article presents an upgrade of the radar navigation system, in particular, its collision avoidance planning tool, using a decision model that combines dynamic parameters into one decision—the collision avoidance course. In this paper, a multi-parametric
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Inhibition and Hydrodynamic Analysis of Twin Side-Hulls on the Porpoising Instability of Planing Boats J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-05 Jiandong Wang; Jiayuan Zhuang; Yumin Su; Xiaosheng Bi
A comparative analysis of the hydrodynamic performance of a planing craft in the monomer-form state (MFS) and trimaran-form state (TFS) was performed, and the inhibition mechanism of twin side-hulls on porpoising instability was evaluated based on the numerical method. A series of drag tests were conducted on the monomer-form models with different longitudinal locations of the center of gravity (Lcg);
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Plasticity and Multiplicity of Trophic Modes in the Dinoflagellate Karlodinium and Their Pertinence to Population Maintenance and Bloom Dynamics J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-05 Huijiao Yang; Zhangxi Hu; Ying Zhong Tang
As the number of mixotrophic protists has been increasingly documented, “mixoplankton”, a third category separated from the traditional categorization of plankton into “phytoplankton” and “zooplankton”, has become a new paradigm and research hotspot in aquatic plankton ecology. While species of dinoflagellates are a dominant group among all recorded members of mixoplankton, the trophic modes of Karlodinium
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The Influence of Sizing of Wave Energy Converters on the Techno-Economic Performance J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-05 Jian Tan; Henk Polinder; Antonio Jarquin Laguna; Peter Wellens; Sape A. Miedema
Currently, the techno-economic performance of Wave Energy Converters (WECs) is not competitive with other renewable technologies. Size optimization could make a difference. However, the impact of sizing on the techno-economic performance of WECs still remains unclear, especially when sizing of the buoy and Power Take-Off (PTO) are considered collectively. In this paper, an optimization method for the
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Signals and Images in Sea Technologies J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-04 Davide Moroni; Ovidio Salvetti
Note: In lieu of an abstract, this is an excerpt from the first page. Life below water is the 14th Sustainable Development Goal (SDG) envisaged by the United Nations and is aimed at conserving and sustainably using the oceans, seas and marine resources for sustainable development [...]
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Numerical Modelling of the Effects of the Gulf Stream on the Wave Characteristics J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-04 Sonia Ponce de León; Carlos Guedes Soares
The influence of the Gulf Stream on the wind wave characteristics is investigated. Wave–current interaction inside the current field can result in significant inhomogeneities of the wave field that change the wave spectrum and wave statistics. This study relies on regional realistic simulations using high resolution in time, space and in the spectral space that allow to solve small scale features of
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Simulation of Bay-Shaped Shorelines after the Construction of Large-Scale Structures by Using a Parabolic Bay Shape Equation J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-04 Changbin Lim; Jooyong Lee; Jung Lyul Lee
Among the various causes of coastal erosion, the installation of offshore breakwaters is considered the main cause that influences the most serious changes in shorelines. However, without a proper means for predicting such terrain changes, countries and regions continue to suffer from the aftermath of development projects on coastal land. It has been confirmed that the parabolic bay shape equation
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Optimal Damping Concept Implementation for Marine Vessels’ Tracking Control J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-04 Evgeny I. Veremey
This work presents the results of studies related to the design of stabilizing feedback connections for marine vessels moving along initially given trajectories. As is known, in mathematical formalization, this question leads to a problem of tracking control synthesis for nonlinear and non-autonomous plants. To provide desirable stability and performance features of the closed-loop systems to be synthesized
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Boat Noise and Black Drum Vocalizations in Mar Chiquita Coastal Lagoon (Argentina) J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-04 Maria Ceraulo; María Paz Sal Moyano; Fernando Jose Hidalgo; María Cielo Bazterrica; Salvatore Mazzola; María Andrea Gavio; Giuseppa Buscaino
Human-generated underwater noise and its effect on marine biota is recognized as an important issue. Boat noise can affect the communication success of fish species that use sounds for spawning purposes. During the reproductive period, males of the black drum Pogonias spp. produce calls ranging from 90 Hz to 300 Hz. In the Mar Chiquita coastal lagoon (Buenos Aires, Argentina), Pogonias courbina is
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Abatement of Ocean-Wave Impact by Crevasses in an Ice Shelf J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-04 Yuri V. Konovalov
Forced ice-shelf oscillations modeling was undertaken employing a full 3D finite-difference model of an elastic ice shelf that was coupled to a treatment of under-shelf seawater flux. The seawater flux was described by the wave equation, which includes the pressure excitements in the shallow water layer under the ice shelf. Thus, ice-shelf flexure was produced by hydrostatic pressure oscillations in
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Relative Sea Level Changes and Morphotectonic Implications Triggered by the Samos Earthquake of 30th October 2020 J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-03 Niki Evelpidou; Anna Karkani; Isidoros Kampolis
On 30th October 2020, the eastern Aegean Sea was shaken by a Mw = 7.0 earthquake. The epicenter was located near the northern coasts of Samos island. This tectonic event produced an uplift of the whole island as well as several cases of infrastructure damage, while a small tsunami followed the mainshock. Underwater and coastal geological, geomorphological, biological observations and measurements were
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Cross-Shore Profile Evolution after an Extreme Erosion Event—Palanga, Lithuania J. Mar. Sci. Eng. (IF 2.033) Pub Date : 2021-01-02 Loreta Kelpšaitė-Rimkienė; Kevin E. Parnell; Rimas Žaromskis; Vitalijus Kondrat
We report cross-shore profile evolution at Palanga, eastern Baltic Sea, where short period waves dominate. Cross-shore profile studies began directly after a significant coastal erosion event caused by storm “Anatol”, in December of 1999, and continued for a year. Further measurements were undertaken sixteen years later. Cross-shore profile changes were described, and cross-shore transport rates were
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