Maritime Policy & Management最新文献_第4页

A deep learning approach for port congestion estimation and prediction 一种用于端口拥塞估计和预测的深度学习方法

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-04-07 DOI: 10.1080/03088839.2022.2057608

Wenhao Peng, Xiwen Bai, Dong Yang, Kum Fai Yuen, Junfeng Wu

{"title":"A deep learning approach for port congestion estimation and prediction","authors":"Wenhao Peng, Xiwen Bai, Dong Yang, Kum Fai Yuen, Junfeng Wu","doi":"10.1080/03088839.2022.2057608","DOIUrl":"https://doi.org/10.1080/03088839.2022.2057608","url":null,"abstract":"ABSTRACT This study proposes high-frequency container port congestion measures based on Automatic Identification System (AIS) data. Vessel movement information of 3,957 container ships from March 2017 to April 2017 is included. The world top 20 container ports’ berth and anchorage areas are identified through Density Based Spatial Clustering of Applications with Noise (DBSCAN) and convex hull methods, and their hourly port congestion statuses are depicted in terms of the traffic volume and turnaround time. The constructed congestion measures overcome the disadvantages of the traditionally used port or industry data, which is heterogenous, behind the time and not easy to obtain publicly. The higher frequency (hourly) of the proposed measures can effectively monitor any slight change in port performance. A Long Short-Term Memory (LSTM) neural network model is then proposed for congestion prediction using constructed congestion measures. Point prediction and sequence prediction are both performed. We innovatively introduce congestion propagation effects into the prediction model as input features. Using Shanghai, Singapore and Ningbo ports as case studies, results show that the inclusion of congestion propagation effect can improve the prediction performance especially for sequence prediction. This study provides significant implications and decision support for container shipping market participants.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"835 - 860"},"PeriodicalIF":3.5,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46090884","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 10

Analysis of safety climate effect on individual safety consciousness creation and safety behaviour improvement in shipping operations 航运作业中安全气氛对个体安全意识培养和安全行为改善的影响分析

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-04-07 DOI: 10.1080/03088839.2022.2059718

Y. Xi, Shenping Hu, Zaili Yang, S. Fu, Jinxian Weng

{"title":"Analysis of safety climate effect on individual safety consciousness creation and safety behaviour improvement in shipping operations","authors":"Y. Xi, Shenping Hu, Zaili Yang, S. Fu, Jinxian Weng","doi":"10.1080/03088839.2022.2059718","DOIUrl":"https://doi.org/10.1080/03088839.2022.2059718","url":null,"abstract":"ABSTRACT Unsafe acts of ship officers have been a direct cause of many maritime accidents. In the maritime industry, much effort has been made to prevent unsafe acts and to improve safe behaviours of ship officers. The positive effect of organizational safety climate on human behaviour has been well documented in the literature. Within this context, this paper aims to pioneer the development of the measurement constructs of safety climate in shipping operations and analyze its impact on safety consciousness and behaviour of ship officers. Using primary data collected from 284 deck officers and captains, an exploratory and confirmatory factor analysis and a structural equation model are used to reveal the relationship among the constructs of safety climate, safety consciousness and safety behaviour. The research results show that (1) safety climate generates a direct positive effect on safety consciousness and behaviour; (2) safety consciousness has a positive effect on safety behaviour; and (3) safety consciousness acts as a mediator between safety climate and safety behaviour. Its managerial implications and practical contributions lie in the provision of useful insights on how ship managers can effectively gain the improved safety behaviours of ship officers by appropriate introduction of safety climate and consciousness.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"941 - 956"},"PeriodicalIF":3.5,"publicationDate":"2022-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45883434","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 6

Developing a resilience index for safer and more resilient arctic shipping 制定更安全、更有弹性的北极航运弹性指数

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-04-05 DOI: 10.1080/03088839.2022.2061059

R. Panahi, Mawuli Afenyo, A. Ng

引用次数: 7

Special Issue on ‘Environment and Sustainability’ “环境与可持续发展”特刊

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-04-03 DOI: 10.1080/03088839.2021.1980237

M. Luo, Ling Zhu, Dong Yang

引用次数: 1

Logistics strategy simulation of second-ranked ports on the basis of Japan’s port reforms: a case study of Hakata Port 基于日本港口改革的二级港口物流战略模拟——以博多港为例

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-03-29 DOI: 10.1080/03088839.2022.2057610

Y. Sugimura, Hisayuki Wakashima, Zirui Liang, R. Shibasaki

{"title":"Logistics strategy simulation of second-ranked ports on the basis of Japan’s port reforms: a case study of Hakata Port","authors":"Y. Sugimura, Hisayuki Wakashima, Zirui Liang, R. Shibasaki","doi":"10.1080/03088839.2022.2057610","DOIUrl":"https://doi.org/10.1080/03088839.2022.2057610","url":null,"abstract":"ABSTRACT As a result of the port reforms in Japan, the Japanese government has intensively invested in physical infrastructure to maintain the trunk routes at selected and legally repositioned first rank strategic international ports under the Strategic International Container Port Policy. However, although central international ports, which are legally ranked second, have important roles to play in trade with Asia, it is difficult to expand the functions of these ports further without the development of strategic measures, given the government policies and accompanying budget constraints. This paper describes an examination of the feasibility of logistics strategies for a second-rank port to become a hub for Asia in Japan consistent with the current policy by using the global logistics intermodal network simulation, considering Hakata Port as a case study. The results show that Hakata Port has the potential to collect cargo from ports on the Japan Sea side and to launch shuttle services to Southeast Asia. The simulation results also suggest that cooperation with Kitakyushu Port, which is geographically close, is desirable. Approaches based on the characteristics of port governance in Japan are also presented.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"707 - 723"},"PeriodicalIF":3.5,"publicationDate":"2022-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42904730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 6

An AIS-Based approach for measuring waterway resiliency: a case study of Houston ship channel 基于ais的水路弹性测量方法:以休斯顿船舶航道为例

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-03-11 DOI: 10.1080/03088839.2022.2047813

Sepideh Zohoori, Masood Jafari Kang, M. Hamidi, R. Maihami

{"title":"An AIS-Based approach for measuring waterway resiliency: a case study of Houston ship channel","authors":"Sepideh Zohoori, Masood Jafari Kang, M. Hamidi, R. Maihami","doi":"10.1080/03088839.2022.2047813","DOIUrl":"https://doi.org/10.1080/03088839.2022.2047813","url":null,"abstract":"ABSTRACT Resiliency measurement is a great tool for evaluating system performance and proposing solutions to prevent damage and to recover from disruptive events. This study proposes an analytic approach to quantify narrow waterway systems’ resiliency during disasters. First, metrics are introduced to quantify the resiliency before, during, and after a disruption. The existing Key Performance Indicators (KPIs) for Maritime Transportation Systems (MTS) are examined, and two metrics, 1) the number of inbound and outbound vessels and 2) Total Stopped Vessel-Hours, are selected to measure the resiliency of a waterway system. Second, a heuristic method is developed to derive the KPIs from the Automatic Identification System (AIS) data. Finally, the proposed methodology is performed for the Houston Ship Channel (HSC) AIS data before, during, and after Hurricane Harvey, in August 2017. The results are presented for the entire channel and highlight useful information about the performance of individual docks, terminals, and waterway zones within HSC. This study helps decision-makers identify the weaknesses and potential bottlenecks in a waterway confronting a disruption and come up with remedies.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"797 - 817"},"PeriodicalIF":3.5,"publicationDate":"2022-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46214971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 5

A study on the assessment of risk management performance in maritime start-ups: evidence from China 海事初创企业风险管理绩效评估研究——来自中国的证据

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-02-16 DOI: 10.1080/03088839.2022.2028028

Hengbin Yin, Zhuo Chen, Yi Xiao, M. Mohsin, Z. Liu

{"title":"A study on the assessment of risk management performance in maritime start-ups: evidence from China","authors":"Hengbin Yin, Zhuo Chen, Yi Xiao, M. Mohsin, Z. Liu","doi":"10.1080/03088839.2022.2028028","DOIUrl":"https://doi.org/10.1080/03088839.2022.2028028","url":null,"abstract":"ABSTRACT Due to the COVID-19 pandemic, the international shipping market has been highly volatile, posing a serious threat to the survival and development of many maritime start-ups. With the development of the digital economy, digital transformation is affecting the evolution and upgrading of many traditional enterprises, including maritime enterprises. In the post-COVID-19 era, start-up small and medium-sized enterprises will need to consider the importance of enterprise risk management to achieve transformation and upgrading. The purpose of this study is to provide guidance for the establishment and upgrading of risk management systems for start-ups based on the identification of risk management strategies of maritime enterprises and the evaluation of their performance. The fuzzy analytic hierarchy process and importance-performance analysis methods were used to rank the operational risk, financial risk, market risk, innovation risk, and disaster risk according to sub-items and screen out the risk management schemes for priority improvements. Through empirical research, it was found that the financial risk and market risk response schemes have the lowest performance and need to be prioritised for improvement. This study argues that start-ups can appropriately challenge their risk management strategies to meet potential risk management needs based on their own circumstances.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"818 - 832"},"PeriodicalIF":3.5,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43548592","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 6

A statistical analysis-based Bayesian Network model for assessment of mobbing acts on ships 基于统计分析的贝叶斯网络船舶围捕行为评估模型

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-01-27 DOI: 10.1080/03088839.2022.2029606

Özkan Uğurlu, Şaban Emre Kartal, Orçun Gündoğan, Muhammet Aydin, Jin Wang

{"title":"A statistical analysis-based Bayesian Network model for assessment of mobbing acts on ships","authors":"Özkan Uğurlu, Şaban Emre Kartal, Orçun Gündoğan, Muhammet Aydin, Jin Wang","doi":"10.1080/03088839.2022.2029606","DOIUrl":"https://doi.org/10.1080/03088839.2022.2029606","url":null,"abstract":"ABSTRACT Mobbing is a fundamental problem that disrupts the organization’s structure and negatively affects its employees’ safe work environment. The most critical issue in combating mobbing is increasing the awareness of victims, businesses and society about this problem. The importance of identifying this problem, which will adversely affect the professional life in the maritime profession, as in every professional group, is obvious. This study offers a statistical analysis-based dynamic Bayesian network to model seafarers’ mobbing acts in merchant ships. In this research, measures against mobbing in the maritime industry are also recommended after determining the most frequent mobbing elements in ships. It is observed that the seafarers who have just stepped into onboard are more exposed to mobbing; in contrast, mobbing attacks experienced by seafarers decrease with an increase in age. The most frequent mobbing behaviours are listed as: “I am continually given new tasks“, “My superiors restrict the opportunity for me to express myself” and ”Unfounded rumours about me is circulated in the ship”. The study reveals that while the maritime authorities such as PSC and the ITF have limited capabilities for solving mobbing related problems, the companies may have a crucial role to play in the process.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"750 - 775"},"PeriodicalIF":3.5,"publicationDate":"2022-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41496738","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 2

Effects of COVID-19 on passenger shipping activities and emissions: empirical analysis of passenger ships in Danish waters 新冠肺炎对客轮活动和排放的影响：丹麦水域客轮的实证分析

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-01-21 DOI: 10.1080/03088839.2021.2021595

Qiong Chen, Y. Ge, Yui-yip Lau, M. Dulebenets, Xiaodong Sun, T. Kawasaki, A. Mellalou, Xuezong Tao

{"title":"Effects of COVID-19 on passenger shipping activities and emissions: empirical analysis of passenger ships in Danish waters","authors":"Qiong Chen, Y. Ge, Yui-yip Lau, M. Dulebenets, Xiaodong Sun, T. Kawasaki, A. Mellalou, Xuezong Tao","doi":"10.1080/03088839.2021.2021595","DOIUrl":"https://doi.org/10.1080/03088839.2021.2021595","url":null,"abstract":"ABSTRACT This paper focuses on the analysis of the COVID-19 effects on passenger shipping in Danish waters as an example and aims to analyse the differences in passenger vessel activities and emissions before and after the COVID-19 outbreak. Two sets of Automatic Identification System (AIS) data for the passenger ships sailing in Danish waters associated with the whole year respectively for 2020 and 2019 are used for a comprehensive evaluation of the passenger shipping activities in the region by means of the analysis of variance and bottom-up emission models. A comparison of those results based on the two datasets shows that the COVID-19 pandemic has a major impact on cruise ships, with a significant reduction in the number of ships, average speed, and average draught. In contrast, the pandemic has a smaller impact on ferry-pax only and ferry-ro pax vessels. The effects can also be seen from the fact that, after the COVID-19 outbreak, SOx emissions from cruise ships, ferry-pax only and ferry-ro pax vessels were reduced by 50.71%, 0.51% and 0.82%, respectively. This investigation provides an important reference for policy makers in the marine environment sector.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"776 - 796"},"PeriodicalIF":3.5,"publicationDate":"2022-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48245603","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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: 15

Shipping stocks as lotteries 航运股票就像彩票一样

IF 3.5 3区工程技术

Maritime Policy & Management Pub Date : 2022-01-19 DOI: 10.1080/03088839.2021.2021594

Michalis Makrominas, Stelios N. Marcoulis

{"title":"Shipping stocks as lotteries","authors":"Michalis Makrominas, Stelios N. Marcoulis","doi":"10.1080/03088839.2021.2021594","DOIUrl":"https://doi.org/10.1080/03088839.2021.2021594","url":null,"abstract":"ABSTRACT While shipping stocks are risky investments, their realized returns are found to be consistently lower than expectations derived from a mean-variance framework. The objective of the paper is to examine whether additional characteristics of the return distribution, in particular, extreme positive (maximum) return, are significant in the pricing of shipping stocks. Using U.S. data of publicly listed firms, we find that shipping stocks with a higher daily maximum return in the previous month exhibit significantly lower subsequent returns, suggesting that investors are willing to pay a higher price and accept a lower expected return for such stocks. Our results are robust at portfolio and firm levels after controlling for a barrage of risk factors. Consistent with prospect theory, we corroborate evidence of preference among shipping investors towards lottery-like payoffs. The implications of our work are relevant to investment managers who consider including shipping stocks in their portfolios, to investment bankers providing valuations for the pricing of shipping initial and secondary public offerings, or for mergers and acquisitions, and to shipping firms seeking to estimate their cost of capital in the context of investment appraisal.","PeriodicalId":18288,"journal":{"name":"Maritime Policy & Management","volume":"50 1","pages":"651 - 667"},"PeriodicalIF":3.5,"publicationDate":"2022-01-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42128111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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