Journal of Eta Maritime Science最新文献

Energy and Exergy Analysis of Diesel-Hydrogen and Diesel-Ammonia Fuel Blends in Diesel Engine 柴油发动机中柴油-氢气和柴油-氨气混合燃料的能量和放能分析

IF 0.9

Journal of Eta Maritime Science Pub Date : 2024-06-06 DOI: 10.4274/jems.2024.46503

Kubilay Bayramoğlu

引用次数: 0

Modeling Longshore Sediment Transport for Sustainable Coastal Management in the Damietta Port Area 为达米埃塔港区的可持续沿海管理建立沿岸沉积物迁移模型

IF 0.9

Journal of Eta Maritime Science Pub Date : 2024-06-06 DOI: 10.4274/jems.2024.35119

Ahmed S.A. Ibrahim, Anas M. El Molla, Hany G. I. Ahmed

{"title":"Modeling Longshore Sediment Transport for Sustainable Coastal Management in the Damietta Port Area","authors":"Ahmed S.A. Ibrahim, Anas M. El Molla, Hany G. I. Ahmed","doi":"10.4274/jems.2024.35119","DOIUrl":"https://doi.org/10.4274/jems.2024.35119","url":null,"abstract":"Within the framework of constructing mega coastal ports in Egypt, this research aims to achieve coastal management sustainability in its surroundings by modeling the Longshore Sediment Transport “LST”. The literature in the fields of modeling and sediment transport was reviewed and scrutinized. The model was calibrated by contrasting the calculated wave data against 2003 measured data at the Damietta Buoy. The model inputs were tuned to produce a result that was similar to the observed data. Moreover, the model results were validated against 2005 measured data at the Damietta Buoy. Likewise, MIKE21 SM was used to estimate 2011 bed levels within Damietta Port, where 2010 bathymetrical survey data were used. Confident with the model results, it was employed to synthesize transport data for 1940-2020 in terms of LST, Gross LST “GLST” and Net LST “NLST” while considering human intervention and implementing ERA5 wave data. Results were obtained and analyzed, and there was a significant correlation between the significant wave height “Hs” and the wave period “Tp” and GLST (i.e. R=0.91-0.79, respectively). The analyzed trend results highlighted that in the pre-construction phase of Damietta Port, increases in GLST and NLST were modest (1139.9 and 243.7 m 3 /year, respectively). However, in the post-construction phase of Damietta Port, they escalated between 4679.47 and 3962 m 3 /year. The analyzed results indicated that after introducing coastal protection, GLST and NLST decreased to 2978.1 and 2176 m 3 /year, respectively.","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141376184","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Development of Constructive Measures to Reduce the Consequences of Ship Collisions 制定减少船舶碰撞后果的建设性措施

IF 0.9

Journal of Eta Maritime Science Pub Date : 2024-06-06 DOI: 10.4274/jems.2024.24582

Pavel Burakovskiy

{"title":"Development of Constructive Measures to Reduce the Consequences of Ship Collisions","authors":"Pavel Burakovskiy","doi":"10.4274/jems.2024.24582","DOIUrl":"https://doi.org/10.4274/jems.2024.24582","url":null,"abstract":"An analysis of the damage caused to vessels by collisions shows that the wreck of most struck ships is mainly due to underwater damage developed because of the accident. Such damage is caused, as a rule, by the presence of bulbs on striking ships that have high longitudinal rigidity and strength exceeding the load-bearing capacity of the framing system several times. Scientists in many countries are looking for ways to reduce the consequences of collisions with ships that have bulbs. Based on the results of the research, schemes for modernizing the forward end of ship hulls by installing bulbs with increased longitudinal compliance to reduce the consequences of ship collisions were proposed, and recommendations were developed for the selection of their characteristics, which make it possible to avoid underwater holes on a struck ship. Bulbs with increased longitudinal compliance were designed using methods of plastic limit analysis. The effectiveness of a modernized deformable bow structure was studied using ANSYS LS-DYNA non-linear finite element method computations. The developed technical solutions ensure that in case of collision in the underwater part of a struck vessel, the deformations of the framing systems will remain insignificant, thereby avoiding the appearance of damage below the waterline.","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141381127","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temporal Analysis of Factors Influencing Countries’ Maritime Trade Performance with CRITIC-based VIKOR Method 用基于 CRITIC 的 VIKOR 方法对影响各国海上贸易绩效的因素进行时态分析

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Journal of Eta Maritime Science Pub Date : 2024-06-06 DOI: 10.4274/jems.2024.55798

Emrah Akdamar, E. F. Akgül, Maruf Göğebakan, Evrim Işık

引用次数: 0

Data-Driven Approach for Parameter Estimation and Control of an Autonomous Underwater Vehicle 自主潜水器参数估计和控制的数据驱动方法

IF 0.9

Journal of Eta Maritime Science Pub Date : 2024-06-06 DOI: 10.4274/jems.2024.10438

Tabassum Rasul, Koena Mukherjee

引用次数: 0

Effect of Exhaust Emissions Produced by Fishing Vessels on Air Pollution: A Case Study of Purse Seine Vessels Operating in the Black Sea 渔船废气排放对空气污染的影响：在黑海作业的围网渔船案例研究

IF 0.9

Journal of Eta Maritime Science Pub Date : 2024-06-06 DOI: 10.4274/jems.2024.61214

Eralp Özkaya, Ali Yasin Kaya, Fatih Tonoğlu, Özkan Uğurlu, Jin Wang

{"title":"Effect of Exhaust Emissions Produced by Fishing Vessels on Air Pollution: A Case Study of Purse Seine Vessels Operating in the Black Sea","authors":"Eralp Özkaya, Ali Yasin Kaya, Fatih Tonoğlu, Özkan Uğurlu, Jin Wang","doi":"10.4274/jems.2024.61214","DOIUrl":"https://doi.org/10.4274/jems.2024.61214","url":null,"abstract":"In this study, exhaust emissions originating from purse seine fishing vessels were calculated. A bottom-up method based on ship activities was used for emission calculations. Necessary information for the calculations was obtained from the BAGIS (Fishing Vessels Monitoring System) system. Eighteen purse seiners in the Black Sea region with a length of 20 m or more engaged in fishing activities in the 2017-2018 fishing season were used as samples. These vessels were categorized into three different groups according to their length. The emissions produced by each length group were calculated separately under different conditions for vessels identified as “port”, “operation”, and “navigation”. The total emissions in the Black Sea region and Türkiye were estimated. This study provides emission estimates using operational conditions and real data from Turkish-flagged purse seiners engaged in fishing in the Black Sea. In this respect, this research presents novelty and addresses an important gap in the existing literature. The annual emission amount of purse seine fishing vessels in the Black Sea is 260,000 tons, while the annual emission amount from purse seine vessels throughout Türkiye has been calculated as 440,000 tons. As a result, the effectiveness of the Emission Control Area (ECA)/Sulphur ECA region implementation in reducing emissions from maritime activities has been demonstrated. In addition, this study constitutes a source for the exhaust emission inventory of purse seiners in the Black Sea region.","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Cruise Passengers’ Perceived Service Quality During the Pandemic Period via User-Generated Content 邮轮乘客通过用户生成内容感知大流行病期间的服务质量

IF 0.9

Journal of Eta Maritime Science Pub Date : 2024-06-06 DOI: 10.4274/jems.2024.35403

Batuhan Çullu, Nergis Özispa, Gamze Arabelen

{"title":"Cruise Passengers’ Perceived Service Quality During the Pandemic Period via User-Generated Content","authors":"Batuhan Çullu, Nergis Özispa, Gamze Arabelen","doi":"10.4274/jems.2024.35403","DOIUrl":"https://doi.org/10.4274/jems.2024.35403","url":null,"abstract":"The coronavirus epidemic, which emerged in Wuhan at the end of 2019, spread worldwide and caused more than 4 million deaths as of 2021. The cruise industry, whose goal is to maintain customer satisfaction at the highest possible level, like all service industries, has passed a difficult test with serious coronavirus disease-2019 (COVID-19) cases that emerged on various ships. The new rules of the COVID-19 pandemic are reflected in the service processes of the ships that started to sail again after a long-term pause in the sector. The main motivation of this study is to determine whether the factors affecting customers’ perceived service quality have changed during the pandemic period in the cruise industry, which is one of the sectors where service quality should be maintained high. Therefore, this study aims to determine the factors affecting the perceived service quality of cruise passengers and determine the new factors that occurred during the pandemic. To achieve this goal, the online narratives of 418 passengers cruising in the European Region between September 2020 and September 2021 were analyzed using Leximancer software, and key elements of passengers’ perceptions of service quality were determined. As a result of the study, it was found that cabin location, restaurant quality, and COVID-related variables became significant factors affecting the perceived service quality of cruise passengers during the pandemic period. Additionally, disembarkation and embarkation, which were important variables in the pre-COVID period, were reclassified under the COVID category. The study also determined that adherence to COVID-19 measures by cruise companies positively impacted customer satisfaction during this period.","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2024-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141377186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Calculation of Time-Independent Maneuvering Coefficients of an Underwater Vehicle Based on Single Grid Structure 基于单网格结构的与时间无关的水下航行器操纵系数计算

IF 0.9

Journal of Eta Maritime Science Pub Date : 2024-05-22 DOI: 10.4274/jems.2024.02703

Oguzhan Kirikbas, Şakir Bal

引用次数: 0

Decision-Making for Shipping Networks Based on Adaptive Cumulative Prospect Theory: A Case Study in Vietnam 基于适应性累积前景理论的航运网络决策：越南案例研究

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Journal of Eta Maritime Science Pub Date : 2024-05-22 DOI: 10.4274/jems.2024.76993

Yen Thi Pham, Ngoc Cuong Truong, Phung Hung Nguyen, Hwanseong Kim

引用次数: 0

Fire Safety Analysis Onboard Passenger Ships by using Fire Dynamics Simulations: Case Study of a Turkish Domestic Passenger Ship 利用火灾动力学模拟进行客船消防安全分析：土耳其国内客轮案例研究

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Journal of Eta Maritime Science Pub Date : 2024-05-22 DOI: 10.4274/jems.2024.56514

Tolga Aycı, Barış Barlas, Aykut Ölçer

引用次数: 0