• Journal of Korea Society of Industrial Information Systems
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• v.27 no.6
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• pp.105-114
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• 2022

We examine berth allocation problems in tidal bulk ports with an objective of minimizing the demurrage and dispatch associated berthing cost. In the proposed optimization model inventory (or stock) level constraints are considered so as to satisfy the service level requirements in bulk terminals. It is shown that the mathematical programming formulation of this research provides improved schedule resolution and solution accuracy. We also show that the conventional big-M method of standard resource allocation models can be exempted in tidal bulk ports, and thus the computational efficiency can be significantly improved.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.11a
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• pp.119-119
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• 2023

국가 간의 거래가 꾸준하게 증가함에 따라 수출입 활동도 지속적으로 증가하고 있다. 수출입 활동을 위해서는 포워더의 활동이 필수적이다. 따라서 본 연구에서는 포워더의 서비스를 이용하는 화주의 만족도를 살펴보기 위해 분석을 실시하였다. 컨테이너화물의 화주와 벌크화물의 화주로 구분하여 ‥‥(중략)‥‥.

• Journal of Navigation and Port Research
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• v.42 no.1
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• pp.39-46
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• 2018

Strategic partnerships of alliances and large shipping companies have been steadily launched in shipping market. Converting these alliances into customers and maintaining them important hub port status. The cases of container terminals to establish a political strategy based on. On the other hand, bulk terminals are relatively unexplored container terminal and bulk terminal are included in the same category of port empirical research from the overall perspective. Therefore, analysis of structural equations was utilized in this study. Analysis of the entire measurement model showed that all items except "Results - Intention of renewal" on bulk terminals were significant. This study is expected to contribute to promotion of empirical studies in various levels by compare container terminals and bulk terminals.

• Journal of Korea Port Economic Association
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• v.27 no.1
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• pp.281-304
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• 2011

In the energy-climate era, pollution emissions from port activities have a significant issue in international shipping and port community. Thus international organization such as IMO and developed countries are seeking to develop various reduction strategies against air pollution. However Korea has recently conducted several studies concerning air pollution in port industry. The main purpose of the paper is to suggest emission reduction strategies for bulk terminal in Port of Incheon, which handles large amount bulk cargoes as a gateway for the metropolitan area. For this aim, the clean air strategies of the world major ports were considered and air pollution reduction strategies were suggested. The main findings of this paper are as follows. First, the emission reduction strategies for container terminal are should be integrated based on technologies changes, operational changes and market-based measures. Second, the emission reduction strategies for bulk terminal can be effective when use innovative measures during loading, unloading and storage process such as telescopic cascade trimming chute, snake sandwich equipment, dry fog system and dome structure. Finally, investigation on actual conditions of air pollution in Korean ports and development of environmental evaluation scheme for persisting monitoring should be conducted.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.151-152
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• 2016

Various studies on Port and Terminal have been conducted to gain the competitive advantage, but they are limited to the bulk terminal than container terminal. Therefore, the study is to analyze the service quality of bulk terminal. The study first finds attributes of bulk terminals through professional groups and brainstorm. This study analyzes the difference between the perception of the actors such as carriers, forwarders and shippers, using a bulk terminal. The result shows that all service quality factors have a significant effect on the satisfaction.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2023.05a
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• pp.245-245
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• 2023

감천항 내에는 벌크선석, 어획물 전용 냉동창고, 어획물 공동경매장 및 수리조선소등이 있다. 다양한 목적의 선석과 시설에 따라 조종불능선, 조종성능제한선, 견시불량선, 대형벌크선, 강제도선면제선박 및 어선등 이 감천항 방파제 부근수역을 이용한다. 특히 입출항하는 GT 20,000톤 - 50,000톤 크기의 벌크선박과 VHF교신이 되지 않는 어선들과 방파제 부근수역에서 조우상태가 되어 충돌사고 발생 위험이 존재한다. 따라서, 본연구는 선박 충돌사고를 예방하기 위하여 충돌위험요소를 확인하고 충돌위험요소 제거를 위한 방안을 모색하였으며, 또한 더욱 세심한 연구가 진행되기 위함을 목적으로 한다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2006.06a
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• pp.5-9
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• 2006

• Journal of Navigation and Port Research
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• v.47 no.4
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• pp.182-190
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• 2023

This study proposes a predictive model using XGBoost and SHapley Additive exPlanation (SHAP) to estimate fuel consumption in bulk carriers. Previous studies have also utilized ship engine data and weather data. However, they lacked reliability in predicted results and explanations of variables used in the fuel consumption prediction model implementation. To address these limitations, this study developed a predictive model using XGBoost and SHAP. It provides research background, scope, relevant regulations, previous studies, and research methodology. Additionally, it explains the data cleaning method for bulk carriers and verifies results of the predictive model.

• Journal of Korea Port Economic Association
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• v.35 no.1
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• pp.1-18
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• 2019

It is debated whether the time value of bulk cargo should be reflected in the economic assessment of SOC investments. The purpose of this study is to present the basic considerations that should be addressed to reflect the time value of bulk cargo. The study first tried to understand the status of foreign countries, related research cases, and the limitations of applying findings to the domestic situation. Further, the method of reflecting the time value of bulk cargo, as well as the extent to which it is reflected, varies across countries. Furthermore, the reflection of the time value derived from the transport selection model remains a controversial issue. To overcome these limitations, this study suggests basic environment considerations to reflect time. Although the need to reflect the time value of bulk cargo is fully recognized, it seems that there are issues that need to be reviewed and solved before its actual implementation. To complement this, further research needs to be conducted, and it is expected that more clear guidelines will emerge.

• Journal of Korea Port Economic Association
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• v.32 no.3
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• pp.83-94
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• 2016

The primary purpose of this study is to analyze the impact of bilateral Free Trade Agreements on international trade volume of bulk shipment at the port of Busan in Korea using the Gravity Model. Most recently, the total of 15 Korea's FTAs have been enforced since Korea-Chile FTA in 2004 and more than 50 countries became member of Korea's FTAs. Therefore, aggregated trade volume of Korea's FTA members out of the total trade volume in Korea increased from 25% in 2011 to 67% in 2015. Five Korea's bilateral FTA members are concerned as experimental group while top 10 foreign countries base on trade volume of bulk shipment are applied to the model as control group and panel data was used in this study. According to the results, bilateral FTA, GDP and population have positive impacts on trade volume of bulk shipment at the port of Busan. On the other hand, distance between Korea and its trade partner has negative impact. In examining Hausman test and LR test, the random effect model is statistically more appropriate than the fixed effect model for this study.