• Proceedings of the Korea Port Economic Association Conference
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• 2003.07a
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• pp.29-47
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• 2003

본 연구의 목적은 지난 20년 간 세계 컨테이너항만들을 대상으로 항만집중도 및 항만규모와 성장간 상관관계를 분석해 봄으로써 현재 우리나라가 추진하고 있는 중심항만 개발전략에 대한 시사점을 제시하는 데 있다. 이를 위해 아시아 21개 항만의 허쉬만-허핀달지수를 구하였으며, 세계 50대 컨테이너 항만뿐만 아니라 유럽, 북미 그리고 아시아지역 컨테이너항만들을 대상으로 항만규모와 성장간 실증분석을 시도하였다. 그 결과 아시아 컨테이너항만의 물동량 집중도는 90년대 중반 이후 둔화되고 있으며 동북아지역 항만집중도가 다른 지역에 비해 상대적으로 낮은 것으로 나타났다. 항만규모와 성장간 관계에 있어서도 세계 및 유럽 항만들은 대형항만일수록 성장률이 높았던 것으로 나타난 반면, 아시아지역 컨테이너 항만들은 소형항만들의 성장률이 더 높았던 것으로 분석되었다.

• Journal of Korea Port Economic Association
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• v.25 no.3
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• pp.207-228
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• 2009

The purpose of this paper is to analyze the concentration effect of Busan container terminal. Productivity and efficiency have played key role to attract more cargo to a port because these are important factors to select liners’ calling port in vessel deployment. It means that productivity directly links with the liners’ vessel operation cost. The main results of this paper are as follows: the port concentration by terminal integration can improve the port's external image with recovering tariff competitiveness and also facilitate economic effect of size through efficient management.

• Journal of Digital Convergence
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• v.16 no.9
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• pp.107-114
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• 2018

Since China's economic reform in 1978, international trade has enormously flourished and the port industry is reckoned as a key factor contributing to this growth. This study examines the Bohai Rim port group in the scope of top three largest ports Qingdao, Dalian and Tianjin. By utilizing indicators including concentration ratio (CR), Herfindahl-Hirschman index (HHI), the Gini coefficient and the Lorenz curve as well as shift-share analysis (SSA), the concentration level of this port group in the period 2004-2016 is discussed. As a results, CR demonstrates a decrease during the studied period with a minor fluctuation, and HHI index shows a trend of deconcentration with Bohai Rim port group. In addition, SSA indicates that during the period 2004-2016, the overall shift index of Qingdao port was -1.371 meanwhile with Tianjin and Dalian port were 0.118 and 1.252 in turn. These results suggest that the growth in regional influence of Tianjin and Dalian ports would motivate to the deconcentration pattern in Bohai Rim region. The findings assist decision makers and scholars to obtain knowledge about the port development this region. Considering the geographic position of these three ports as the gate of northeast China, it is suggested that these three ports could explore their advantages and cooperate with the small ports in the surrounding area to enhance their influences in the future study.

• Proceedings of the Korean Society for Noise and Vibration Engineering Conference
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• 2005.05a
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• pp.754-757
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• 2005

Aircraft noise is the serious problem for inhabitants near an air force base. Noise by ground test of aircraft, however, can be minimized through test room construction. In this study, environmental effects of the noise by aircraft ground test were investigated by experiments under the standard act and by performance, prediction of the Hush house, constructed for the noise reduction.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2016.05a
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• pp.159-160
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• 2016

본 연구는 우리나라 수출입 컨테이너화물의 5대 내륙기종점 권역별로 항만집중도 및 변이효과를 분석함으로써, 항만간 경쟁 구도 및 효율적인 컨테이너부두 개발 및 운영에 대한 시사점을 도출하고자 한다. 2011년, 2006년, 2011년의 항만별 내륙기종점 조사자료를 바탕으로 허쉬만-허펜달지수 및 변이할당법을 활용하여 분석하였다.

• Industry Promotion Research
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• v.5 no.4
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• pp.15-28
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• 2020

In this study, the methodology for measuring the structure of the Korean defense market and the competition status, and the characteristics of the Korean defense industry and the market are examined. To analyze the structure of the Korean defense market and the competition status, the market share, concentration ratio, and the Herfindal-Hirschman index are employed based on the annual sales of major Korean defense companies. On a basis of the result of the analysis, the suggestions for the Korean defense market to escape from the monopolistic market to be a competitive geographical market are presented. To present the suggestions, markets that have a similarity with the dense market are analyzed. The government's support policy, the selection of the companies led by the government, and the cost of the military are suggested for the defense market on a basis of analyzing similar markets. With the suggestions, when the government pursues the policies, the defense market sticking to principles and fairness is created and the efficiency of the companies operation is achieved, by enhancing the structure of the market fundamentally and the development of the policies in the industry's perspective.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.65-79
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• 2020

With the rapid development of China's economy, the aviation industry, as an important part of transportation services, has undoubtedly achieved rapid development. However, there is hardly any academic work that was based on the development of the top airlines in the Chinese airline industry. Hence, this study provides empirical research that takes into account the longitudinal development of the top 20 airlines in China from 2009 to 2018. The throughput volumes (cargo and passenger) of the airlines were analyzed by concentration indicators, namely the concentration ratio (CR), the Herfindahl- Hirschman index (HHI), the Gini coefficient, and the shift-share analysis (SSA). In this paper, the top 20 airlines have been analyzed in terms of the passenger and cargo throughput from 2009 to 2018. The calculation results of CR6, HHI and the Gini coefficient show that the airlines were extremely deconcentrated. In addition, by comparing the ABSGR of passenger and cargo throughput, it is shown that China's aviation industry is dominated by four airlines- Air China, China Eastern Airlines, China Southern Airlines and Hainan Airlines. In the future study, it is necessary to explore growth strategies to find niche markets for passenger and cargo transportation.

• Korean Journal of Social Welfare
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• v.56 no.1
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• pp.235-252
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• 2004

The purpose of this study was to construct and test a social relation model of youth school adjustment, based on Hirschi's social bonding theory and the previous findings in the area of youth school adjustment. The social relation model included parent-child relation, peer relation, and teacher-student relation variables. The sample consisted of two groups, 494 adolescents: 351 high school students and 143 adolescent residents at the shelter for runaways. For data analysis, descriptive statistics, correlation analysis, and multiple regression analysis were performed. The main finding was that the social relation model of youth school adjustment was significant in explaining the general school adjustment and academic performance. Specifically, the better relations with parents, peer, and teachers, the higher the degree of youth school adjustment. Among the significant variables, teacher-students relation was the most important variable. Based on these results, this study provided some practical suggestions to effectively enhance the relations with teachers, peer, and parents.

• Journal of Navigation and Port Research
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• v.27 no.2
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• pp.171-178
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• 2003

Lately most Asian countries have tried to develop their ports into a hub port in their region. However, only a few studies examined the theoretical rationale for hub port strategy. Thus, this paper aim to identify the effectiveness of hub port development strategy in global and regional perspectives, respectively. For this aim, the paper conducts regression analysis on the relationship between port size and growth ad calculates the Hirshman-Herfindahal Index on Asian container ports. According to the empirical results, larger ports have grown faster than smaller ports in the world container ports und European/North American ports. However, in the case of the Asian container ports, the result was opposite. And port concentration in Northeast Asian ports is decreasing gradually during the last two decades. Consequently, the effectiveness of hub port development strategy was not very strong in Northeast Asian region.

• Journal of Digital Convergence
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• v.18 no.7
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• pp.37-46
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• 2020

The aim of this research is to analyze the concentration and deconcentration development of cruise ports in the Mediterranean area by utilizing the concentration ratio (CR), the Herfindahl-Hirschman Index (HHI), the Gini coefficient, and shift share analysis (SSA). The results of analysis indicated a concentration trend in the West Mediterranean. The cruise ports located in Venice, Piraeus, Naples and Livrno in Adriatic and East Med region lost cruise passengers, while the those in West Mediterranean gained the passengers and showed the trend of concentration. This paper providing the shifting passengers among cruise ports that indicates the competitiveness of cruise ports for industrial stake holders to better understand the cruise ports such as tourist boards, ship agents, and port agents.