Marine Technology Society Journal最新文献_第7页

Wide-Area Three-Dimensional Imaging of Mesophotic Coral Reefs Using a Low-Cost AUV 利用低成本水下航行器对中孔珊瑚礁进行广域三维成像

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.4

Yukiyasu Noguchi, M. Humblet, Y. Furushima, Shohei Ito, T. Maki

{"title":"Wide-Area Three-Dimensional Imaging of Mesophotic Coral Reefs Using a Low-Cost AUV","authors":"Yukiyasu Noguchi, M. Humblet, Y. Furushima, Shohei Ito, T. Maki","doi":"10.4031/mtsj.56.4.4","DOIUrl":"https://doi.org/10.4031/mtsj.56.4.4","url":null,"abstract":"Abstract Surveys and monitoring are essential to study the biology and ecology of coral reefs in order to understand the reasons behind reef demise and recovery. However, mesophotic coral ecosystems (MCEs) remain largely unknown compared to their shallow counterparts because\u0000 it is difficult to observe the seafloor below 30 m depths. Here, we propose a seafloor observation method using a low-cost autonomous underwater vehicle (AUV). This method was developed to allow many people to easily perform underwater observations of MCEs, and is also applicable to general\u0000 seafloor surveys, such as underwater artificial structures, hydrothermal vent fields, etc. The method possesses three important attributes to achieve effective surveys. First, it can be applied in highly rugged terrains and enables the AUV to track omnidirectional surfaces at high speed (Max.\u0000 ~1 m/s). Second, it can produce a reliable three-dimensional (3D) image of the seafloor based on a depth sensor. Third, it can be used to estimate the flow velocity field. The proposed method was tested by using the AUV HATTORI-2, which is a lightweight, one-man portable AUV equipped\u0000 with commercial off-the-shelf sensors. Our study area is the Sekisei Lagoon in the South Ryukyus, which represents the largest coral reef complex in Japan. The method enabled us not only to obtain a wide and high-definition 3D image of mesophotic coral reefs that captures detailed characteristics\u0000 of marine habitats but also to acquire environmental data, such as flow velocity field and seawater temperature, spatially and temporally aligned with the 3D image.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41947156","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An Empirical Study on the Effects of Sea Ice on Ship Tonnage per Centimeter and Cargo Operations 海冰对船舶每厘米吨位和货物运行影响的实证研究

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.1

İdris Turna, G. Kara, D. B. Danişman

{"title":"An Empirical Study on the Effects of Sea Ice on Ship Tonnage per Centimeter and Cargo Operations","authors":"İdris Turna, G. Kara, D. B. Danişman","doi":"10.4031/mtsj.56.4.1","DOIUrl":"https://doi.org/10.4031/mtsj.56.4.1","url":null,"abstract":"Abstract Many ports around the world are threatened by sea ice. Access by merchant ships to these ports is ensured by ice-breaking services. For the sensitivity of calculations of the amount of cargo on vessels carrying out loading and discharging in waters covered with ice,\u0000 the calculations need to be modified. This study aims to investigate the effects of sea ice in different thicknesses on the calculations of the cargo amounts, especially the effects on the tonnage per centimeter (TPC) values of the vessels. There is a limited number of studies on ice resistance\u0000 of zero-speed vessels. An experimental study was performed to gauge the impact of ice on vessel draughts on a scale ship model. The scaled TPC weights were applied under two separate loading conditions on the scale model ship. Such processes were repeated for various ice thicknesses. The results\u0000 indicated that an increase in TPC values was in a linear relationship with ice thickness and was found under both loading conditions. In analyses based on the scale model according to the draft marks, the ice friction created an overloaded case. In the stability booklets, it is assumed that\u0000 adding the amount of increase in TPC value as a correction would resolve disputes over the amount of loaded cargo and can circumvent overloading cases.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45627395","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessment of the Technological Maturity of Marine Autonomous Surface Ships 海洋自主水面舰艇技术成熟度评估

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.16

N. Vedachalam

引用次数: 0

Monitoring and Research on Submarine Hydrate Mound: Review and Future Perspective 海底水合物丘监测与研究综述与展望

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.14

Y. Ge, C. Cao, Jia-wang Chen, Hao Wang, Peihao Zhang, Jiamin He, Yuan Lin

{"title":"Monitoring and Research on Submarine Hydrate Mound: Review and Future Perspective","authors":"Y. Ge, C. Cao, Jia-wang Chen, Hao Wang, Peihao Zhang, Jiamin He, Yuan Lin","doi":"10.4031/mtsj.56.4.14","DOIUrl":"https://doi.org/10.4031/mtsj.56.4.14","url":null,"abstract":"Abstract Submarine hydrate mounds are important indicators of submarine methane seepages, hydrocarbon reservoirs, and seabed instability. In order to fully understand the formation of hydrate mounds, here, we review the study of hydrate mounds, in which the morphology, the\u0000 formation mechanism, as well as the research techniques are introduced. The formation mechanism of hydrate mounds can be classified into: (1) The sediment volume expands due to the formation and accumulation of shallow hydrates; (2) unconsolidated shallow sediment layers respond mechanically\u0000 to increasing pore pressure caused by shallow gas accumulation; (3) materials extrude from submarine layers driven by the over-pressure caused by shallow gas accumulation; and (4) the interaction of multiple factors. Most hydrate mounds occur in submarine gas hydrate occurrence areas. Active\u0000 hydrate mounds are circular or ellipse well-rounded shaped, with gas seepages and abundant organisms, whereas inactive hydrate mounds are rough or uneven irregular shaped, with low flux of fluid in the migration channel. Due to the limitation of long-term in-situ observation technology, the\u0000 existing observation method makes it possible to provide basic morphology features, stratigraphic structures, and fluid migration channels of the hydrate mound. Future research should be focused on the long-term in-situ monitoring technology, the formation mechanism of the hydrate mounds,\u0000 and the role of gas hydrates in the seafloor evolution. In addition, the features of hydrate mounds (e.g., gas chimneys and fluid migration conduits) and the relationship between hydrate mounds and pockmarks could be further studied to clarify the influence of methane release from hydrate\u0000 mounds on biogeochemical processes and the atmospheric carbon contents.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70232322","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

A Quantitative HAZOP Risk Analysis Under Extended CREAM Approach for Maritime Autonomous Surface Ship (MASS) Operation 基于扩展奶油法的海上自主水面舰艇(MASS)作业HAZOP风险定量分析

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.11

Yasin Burak Kurt, E. Akyuz, O. Arslan

{"title":"A Quantitative HAZOP Risk Analysis Under Extended CREAM Approach for Maritime Autonomous Surface Ship (MASS) Operation","authors":"Yasin Burak Kurt, E. Akyuz, O. Arslan","doi":"10.4031/mtsj.56.4.11","DOIUrl":"https://doi.org/10.4031/mtsj.56.4.11","url":null,"abstract":"Abstract Globally, there has been a substantial growth in interest in autonomous surface ships. This new domain presents numerous concerns for enhanced reader comprehension. The most crucial topic to consider is the safety of autonomous ships and the risks they present. To\u0000 enable the use of autonomous ships, they must be as safe for the environment and for people as manned surface ships. However, as it has not yet been widely implemented, acquiring real-time data restricts the scope of the study. The objective of this paper is to conduct a comprehensive quantitative\u0000 risk analysis for maritime autonomous surface ships (MASS). Therefore, it focuses on the operations to be performed by MASS and the factors that may pose a risk. In this context, Hazard and Operability Analysis (HAZOP) and Cognitive Reliability and Error Analysis Method (CREAM) approaches\u0000 will be used in risk analysis assessment. While the HAZOP method will be used to determine the deviations, causes, possible consequences, and measurements that autonomous surface ships will be exposed to, the extended CREAM will be used to determine the likelihood of occurrence and risk levels\u0000 of the MASS operation. The outcomes of the paper are anticipated to enhance the safety operational safety level of autonomous ships as well as mitigate risks.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46792397","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Climate-Resilient and Eco-Friendly Shipping: Mapping the Trends 气候适应性和生态友好型航运：趋势图

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.12

Manickavasagam Palaniappan, N. Vedachalam

引用次数: 0

Undertaking Deep-Sea Mining: A Quest for the Right Answers 从事深海采矿:寻求正确答案

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.13

Rahul Sharma

引用次数: 0

Fault Tree Analysis of a Full-Ocean-Depth Unmanned Submersible 全水深无人潜水器故障树分析

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.3

Ruilong Luo, Y. Guo, Fang Wang, Youjie Li, Shuai Li, Jinfei Zhang, Zhe Jiang

引用次数: 0

Research on Terrain Monitoring Device of Natural Gas Hydrate Trial Production Area in the Sea 海上天然气水合物试采区地形监测装置研究

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.5

C. Cao, Y. Ge, Jia-wang Chen, Hao Wang, Han Ge, P. Zhou, F. Gao, Yan Sheng, Lieyu Tian, Yifan Huang

{"title":"Research on Terrain Monitoring Device of Natural Gas Hydrate Trial Production Area in the Sea","authors":"C. Cao, Y. Ge, Jia-wang Chen, Hao Wang, Han Ge, P. Zhou, F. Gao, Yan Sheng, Lieyu Tian, Yifan Huang","doi":"10.4031/mtsj.56.4.5","DOIUrl":"https://doi.org/10.4031/mtsj.56.4.5","url":null,"abstract":"Abstract As an important green energy source for the future, deep-sea natural gas hydrate has attracted worldwide attention in recent years, and several trial exploitations have been carried out. Hydrates are prone to decomposition leading to terrain subsidence; hence, there\u0000 is an urgent need to monitor terrain change during the exploration. In this study, a monitoring device based on six-axis Micro-Electro-Mechanical System array is developed to monitor the terrain subsidence during production of gas hydrate. The liability of the device has been tested both by\u0000 lab experiments and a sea trial in the “Shenhu” area of the South China Sea with water-depth of 1,203 m. The device performed in-situ monitoring for 193 consecutive days; the deformation of the seafloor terrain has been successfully measured, and the seafloor topography has been\u0000 obtained and reconstructed, showing that the overall average uplift of the seafloor terrain is 0.82 cm, with a maximum uplift of 5.98 cm and a maximum subsidence of 3.21 cm. The result shows that the geological conditions in the “Shenhu” area are stable, which provide a reference\u0000 for the development of hydrates.","PeriodicalId":49878,"journal":{"name":"Marine Technology Society Journal","volume":null,"pages":null},"PeriodicalIF":0.8,"publicationDate":"2022-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46700872","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Two Unique Deep Ocean Operations With the Mir Submersibles 和平号潜水器的两次独特深海作业

IF 0.8 4区工程技术

Marine Technology Society Journal Pub Date : 2022-08-23 DOI: 10.4031/mtsj.56.4.2

A. Sagalevich

引用次数: 0