Pub Date : 2024-01-18DOI: 10.26650/jtl.2023.1207427
Engin Kudu, B. Koldemir
{"title":"Kocaeli Konteyner Limanlarında Geri Saha ve Depolama Alanı İhtiyaçlarının İncelenmesi","authors":"Engin Kudu, B. Koldemir","doi":"10.26650/jtl.2023.1207427","DOIUrl":"https://doi.org/10.26650/jtl.2023.1207427","url":null,"abstract":"","PeriodicalId":489499,"journal":{"name":"Journal of transportation and logistics","volume":"102 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139614667","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}
Pub Date : 2024-01-18DOI: 10.26650/jtl.2023.1338878
Z. Çil, Damla Kizilay, Hande Öztop
This study addresses the integrated disassembly line balancing and pickup-delivery vehicle routing problem of companies with multiple disassembly centers. In a supply chain with distributed disassembly centers, the products to be disassembled must be collected from the factories where they are supplied and brought to the disassembly centers. Then, these collected products must be disassembled in the disassembly centers and these disassembled components must be distributed to the factories that demand the disassembled parts. Since there are distributed disassembly centers, factories that request components and factories that supply products should be assigned to the disassembly centers. This study aims to provide an integrated plan for the assignment, disassembly line balancing and collection-distribution processes. In this study, there are distributed disassembly centers with limited product supplies, and distribution and collection operations are considered together in the vehicle routing problem. The problem differs from the studies in the literature with these features. The simultaneous collection and distribution operations aim to save time and reduce transportation costs of vehicles. A mixed-integer nonlinear programming model, a mixed-integer linear programming model and a constraint programming model are presented to solve the integrated problem. The performance of the mixed-integer linear programming and constraint programming models has been evaluated using small-sized instances, and the computational findings indicate that both models can provide effective solutions for the problem.
{"title":"Mathematical Models for Disassembly Line Balancing and Pickup - Delivery Vehicle Routing Problem","authors":"Z. Çil, Damla Kizilay, Hande Öztop","doi":"10.26650/jtl.2023.1338878","DOIUrl":"https://doi.org/10.26650/jtl.2023.1338878","url":null,"abstract":"This study addresses the integrated disassembly line balancing and pickup-delivery vehicle routing problem of companies with multiple disassembly centers. In a supply chain with distributed disassembly centers, the products to be disassembled must be collected from the factories where they are supplied and brought to the disassembly centers. Then, these collected products must be disassembled in the disassembly centers and these disassembled components must be distributed to the factories that demand the disassembled parts. Since there are distributed disassembly centers, factories that request components and factories that supply products should be assigned to the disassembly centers. This study aims to provide an integrated plan for the assignment, disassembly line balancing and collection-distribution processes. In this study, there are distributed disassembly centers with limited product supplies, and distribution and collection operations are considered together in the vehicle routing problem. The problem differs from the studies in the literature with these features. The simultaneous collection and distribution operations aim to save time and reduce transportation costs of vehicles. A mixed-integer nonlinear programming model, a mixed-integer linear programming model and a constraint programming model are presented to solve the integrated problem. The performance of the mixed-integer linear programming and constraint programming models has been evaluated using small-sized instances, and the computational findings indicate that both models can provide effective solutions for the problem.","PeriodicalId":489499,"journal":{"name":"Journal of transportation and logistics","volume":"106 17","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139615584","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}
Pub Date : 2024-01-18DOI: 10.26650/jtl.2023.1203871
Richard C. Osadume, A. Okene, Blessing Uzoma, D. Enaruna
This study examined the evaluation of delay factors at Nigeria’s Apapa seaports. The specific study objective was to evaluate the various delay factors at Nigerian seaports and the specific delay factors affecting the Apapa seaports. The primary method of data collection was via questionnaire application and Taro Yamane’s population sampling method while results were analyzed using the ANOVA statistics. The findings revealed a statistically significant effect of port delay factors at the seaports on national and economic output. The study concludes that port delay factors at the seaports significantly affect economic activities in Nigeria and there should be the creation of more evacuation corridors at the seaports to facilitate prompt service delivery and improve the country’s ease of doing business among others
{"title":"An Evaluation of the Delay Factors in Nigeria’s Seaports: A Study of the Apapa Port Complex","authors":"Richard C. Osadume, A. Okene, Blessing Uzoma, D. Enaruna","doi":"10.26650/jtl.2023.1203871","DOIUrl":"https://doi.org/10.26650/jtl.2023.1203871","url":null,"abstract":"This study examined the evaluation of delay factors at Nigeria’s Apapa seaports. The specific study objective was to evaluate the various delay factors at Nigerian seaports and the specific delay factors affecting the Apapa seaports. The primary method of data collection was via questionnaire application and Taro Yamane’s population sampling method while results were analyzed using the ANOVA statistics. The findings revealed a statistically significant effect of port delay factors at the seaports on national and economic output. The study concludes that port delay factors at the seaports significantly affect economic activities in Nigeria and there should be the creation of more evacuation corridors at the seaports to facilitate prompt service delivery and improve the country’s ease of doing business among others","PeriodicalId":489499,"journal":{"name":"Journal of transportation and logistics","volume":"118 25","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139616265","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}
Pub Date : 2024-01-18DOI: 10.26650/jtl.2023.1370019
Turgut Hacıvelioğulları, Nurullah Umarusman
{"title":"Bulanık Çıkarım Sistemleri Kullanılarak Sürdürülebilir Tedarikçi Seçim Probleminin İncelenmesi","authors":"Turgut Hacıvelioğulları, Nurullah Umarusman","doi":"10.26650/jtl.2023.1370019","DOIUrl":"https://doi.org/10.26650/jtl.2023.1370019","url":null,"abstract":"","PeriodicalId":489499,"journal":{"name":"Journal of transportation and logistics","volume":"122 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139614891","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}
Pub Date : 2024-01-18DOI: 10.26650/jtl.2023.1217543
Bülent Yıldız
{"title":"Autonomous Delivery Vehicles: A Quantitative Study from the Perspective of Innovativeness","authors":"Bülent Yıldız","doi":"10.26650/jtl.2023.1217543","DOIUrl":"https://doi.org/10.26650/jtl.2023.1217543","url":null,"abstract":"","PeriodicalId":489499,"journal":{"name":"Journal of transportation and logistics","volume":"112 42","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139615442","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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