{"title":"Analysis of the Co-integration Between the Number of Cruise Tourists and the World Unemployment Rate","authors":"E. Arlı, Mehmet Sıtkı Saygılı, Duygu Ülker","doi":"10.4274/jems.2023.46873","DOIUrl":"https://doi.org/10.4274/jems.2023.46873","url":null,"abstract":"","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138957826","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}
{"title":"Evaluating the Technical Efficiency of Dry-Bulk and General Cargo Terminals in Türkiye using Interval DEA","authors":"Volkan Efecan","doi":"10.4274/jems.2023.38233","DOIUrl":"https://doi.org/10.4274/jems.2023.38233","url":null,"abstract":"","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139170980","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}
{"title":"Simulation-Based Cost Evaluation of Maritime Transportation","authors":"Davut Pehlivan, Kadir Çiçek","doi":"10.4274/jems.2023.75875","DOIUrl":"https://doi.org/10.4274/jems.2023.75875","url":null,"abstract":"","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138954132","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}
{"title":"Ship-Generated Waste Management in İstanbul Ports: An Analytical Methodology to Evaluate Waste Reception Performance (WRP)","authors":"Duygu Ülker, Serap Göksu, Ender Yalçın, Önder Canbulat","doi":"10.4274/jems.2023.53244","DOIUrl":"https://doi.org/10.4274/jems.2023.53244","url":null,"abstract":"","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138955803","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}
{"title":"Practical Design Framework for Lobster-Type Motor Yachts","authors":"Bülent İbrahim Turan, Mehmet Akman","doi":"10.4274/jems.2023.69077","DOIUrl":"https://doi.org/10.4274/jems.2023.69077","url":null,"abstract":"","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138994371","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}
{"title":"A Contemporary Analysis for COVID-19 Pandemic Related Port Congestion in Gemlik Region of Türkiye","authors":"Ender Yalçın, Serap Göksu, Can Taş","doi":"10.4274/jems.2023.04900","DOIUrl":"https://doi.org/10.4274/jems.2023.04900","url":null,"abstract":"","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.9,"publicationDate":"2023-12-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139169569","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}
{"title":"Selection of Ocean Container Carrier: An Analytic Network Process (ANP) Approach","authors":"Ayfer Ergin, Güler Alkan","doi":"10.4274/jems.2023.96977","DOIUrl":"https://doi.org/10.4274/jems.2023.96977","url":null,"abstract":"","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135131288","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}
Hasan Öztürk, KADIR BEYTULLLAH GÜNDÜZ, Yasemin ARIKAN OZDEN
In this study, the maneuvering forces and moments of the DARPA Suboff submarine model were determined under static drift condition using computational fluid dynamics (CFD) methods. Two different configurations of the submarine model namely; the AFF-3 configuration, which consists of bare hull and four stern rudders, and the fully appended configuration AFF-8, which is formed from bare hull, sail, and four stern rudders, have been used. Initially, for the AFF-3 configuration, a mesh independence study has been conducted. Three different cases; coarse, medium and fine meshes are investigated at small angles (0-2-4-6 degrees). After that the results have been verified, the medium mesh structure has been selected and the analyzes have been continued for larger angles (from 00 to 180 degrees). The accuracy of the obtained results was assessed by comparing them with non-dimensional experimental results. The comparison between the CFD results and the experimental results demonstrated a high level of agreement, indicating the effectiveness and accuracy of the CFD methods used in this study. After the validation studies, the maneuvering forces and moments of the AFF-8 fully appended configuration were calculated for which no prior experimental data existed in the literature. To achieve this, steady-state CFD simulations were performed using the commercial software ANSYS Fluent, and the results were presented for the same flow angles.
{"title":"Numerical Investigation of the Maneuvering Forces of Different DARPA Suboff Configurations for Static Drift Condition","authors":"Hasan Öztürk, KADIR BEYTULLLAH GÜNDÜZ, Yasemin ARIKAN OZDEN","doi":"10.4274/jems.2023.18942","DOIUrl":"https://doi.org/10.4274/jems.2023.18942","url":null,"abstract":"In this study, the maneuvering forces and moments of the DARPA Suboff submarine model were determined under static drift condition using computational fluid dynamics (CFD) methods. Two different configurations of the submarine model namely; the AFF-3 configuration, which consists of bare hull and four stern rudders, and the fully appended configuration AFF-8, which is formed from bare hull, sail, and four stern rudders, have been used. Initially, for the AFF-3 configuration, a mesh independence study has been conducted. Three different cases; coarse, medium and fine meshes are investigated at small angles (0-2-4-6 degrees). After that the results have been verified, the medium mesh structure has been selected and the analyzes have been continued for larger angles (from 00 to 180 degrees). The accuracy of the obtained results was assessed by comparing them with non-dimensional experimental results. The comparison between the CFD results and the experimental results demonstrated a high level of agreement, indicating the effectiveness and accuracy of the CFD methods used in this study. After the validation studies, the maneuvering forces and moments of the AFF-8 fully appended configuration were calculated for which no prior experimental data existed in the literature. To achieve this, steady-state CFD simulations were performed using the commercial software ANSYS Fluent, and the results were presented for the same flow angles.","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135131294","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}
Nikolay Sinyavsky, Oksana Synashenko, Natalia Kostrikova
This work is a preliminary dielectric relaxation time distribution analysis of several fresh and used marine engine oils that have not previously been examined for degradation with relaxation time distribution. The correlation of the distribution of relaxation times with other characteristics of oils, particularly the content of additives and wear products
{"title":"Application of relaxation times distribution of dielectric permittivity for marine engine oils analysis","authors":"Nikolay Sinyavsky, Oksana Synashenko, Natalia Kostrikova","doi":"10.4274/jems.2023.48568","DOIUrl":"https://doi.org/10.4274/jems.2023.48568","url":null,"abstract":"This work is a preliminary dielectric relaxation time distribution analysis of several fresh and used marine engine oils that have not previously been examined for degradation with relaxation time distribution. The correlation of the distribution of relaxation times with other characteristics of oils, particularly the content of additives and wear products","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135132325","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}
In engineering problems, the concepts of design and optimization are two basic topics that are related to each other. The problem owner should prioritize the design or optimization on each other. In this regard, two different ways can be followed in engineering problems: firstly designing and then optimizing or using optimized parameters in the design process. In this study, the basic design parameters of a capesize bulk carrier for a specific purpose were created and exemplified on a model. The prototype development problem is handled as a multi-criteria optimization problem by creating appropriate and pareto optimal solutions. Parameter Space Investigation method was used to solve this optimization problem, and this method was applied in a program called Multi-criteria Optimization Vector Identification. As a result of the study, the design parameters of the capesize bulk carrier sample were created and the objective function criteria were obtained better than the prototype and the value in the literature.
{"title":"Multi-criteria analysis of capesize bulk carrier design optimization model","authors":"Cansu Aksu, Ramazan Yaman","doi":"10.4274/jems.2023.77045","DOIUrl":"https://doi.org/10.4274/jems.2023.77045","url":null,"abstract":"In engineering problems, the concepts of design and optimization are two basic topics that are related to each other. The problem owner should prioritize the design or optimization on each other. In this regard, two different ways can be followed in engineering problems: firstly designing and then optimizing or using optimized parameters in the design process. In this study, the basic design parameters of a capesize bulk carrier for a specific purpose were created and exemplified on a model. The prototype development problem is handled as a multi-criteria optimization problem by creating appropriate and pareto optimal solutions. Parameter Space Investigation method was used to solve this optimization problem, and this method was applied in a program called Multi-criteria Optimization Vector Identification. As a result of the study, the design parameters of the capesize bulk carrier sample were created and the objective function criteria were obtained better than the prototype and the value in the literature.","PeriodicalId":41280,"journal":{"name":"Journal of Eta Maritime Science","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135131287","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}
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