• Journal of Navigation and Port Research
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• v.38 no.1
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• pp.65-71
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• 2014

Gyeongbu and Namhae expressways in the country, are the major arterial highways which are connected with the Busan port in the north-south and east-west directions, respectively, and required to study the traffic characteristics about the hourly volume factors(K-factor) by concentrated midium-size and large-size cargo trucks of 20% or higher in expressways. We therefore attempted to predict the K-factor in expressways through the correlation analysis between K-factor and K-factor estimates on the basis of the short-term VDS data collected at the basic segments of the above major expressways. As a result, power model appeared to be appropriate in predicting K-factor by the K-factor estimate based on VDS data for 7 days with a high explanatory power and validity.

• Journal of Korea Port Economic Association
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• v.22 no.3
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• pp.161-188
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• 2006

The purpose of this study is to analyze traffic volume between the Korean container ports located at the west coast and northern Chinese ports and then the distribution trend of container between Korea and China. The findings of the study are as follows. First, Container traffic between western Korean ports and northern Chinese ports has been increasing due to an increasing trade volume between both countries and geographical accessibility. Second, Seoul and neighboring area tend to use the trade route between the western ports and northern Chinese because of lower logistics costs and time-saved advantage compared to another ports. Third, the growth of the western ports did depend mainly on the northern China oriented growth. Such a fact could leads to the overlapping investment in port development in Korea and another intense competition among national ports to attract cargoes and liners. Therefore, port development policy considering the characteristics and function of national ports have to be established. and also alternatives and strategies for improving the competitive edge of small and medium sized shipping lines against the opening of shipping market have to be worked out.

• Journal of Korean Society of Transportation
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• v.26 no.5
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• pp.117-127
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• 2008

After the deregulation of the aviation market in the United States in 1978, airlines took advantage of the possibilities of the liberalized market and reorganized their networks. Then, the hub-and-spoke networks became widely used in the aviation market. The framework of hub-and-spoke network made it feasible to amplify flight networks. Thus, a number of airlines were able to fly to more destinations than ever before through the networks. Amplification of networks can be implementing through the transfer of passengers, transshipment of cargo, or both most researches have been concentrated on the passenger aspect at airports worldwide. Air cargo, however, has become one of the most significant areas at hub airports to keep their leading position in terms of the provision of services and handling volumes. This paper investigates the connectivity of airfreight networks as the temporal concentrations in current network at Incheon International Airport. In order to evaluate airline flight schedule effects to stimulate hubbing at an airport, the indirect connectivity can be considered to be the number of direct frequencies, the minimum connecting times and the quality of the connection determine indirect connectivity. Therefore the connectivity of freight transshipment depends on both the quality of the connection at the hub airport and the quality of the indirect flight compared to the direct flight. In addressing these issues, this paper analyzes the connectivity of flight schedules using a temporal wave-system structure and estimates the degree of connectivity and quality of connectivity applying the NETSCAN model.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2017.11a
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• pp.64-67
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• 2017

화물량이나 해상관광객 유입 확대 등 항만수요의 증가에 따른 대응으로 항만을 확장하거나 신규항만을 계획하게 된다. 우리나라 어항의 경우 경관이 수려하고 청정지역으로 분류되어 개발여지가 크다. 이중 감포항의 경우도 해상을 통한 연안 화물의 운송확장과 어항의 기능에서 연안항의 여건을 갖추고 경주와 연계한 해양 관광벨트를 구성하여 친수공간 조성, 송대말 등대 컨텐츠 사업 등 해양관광의 거점으로 도약하기 위한 집중개발을 추진 중에 있어서 종합적인 관점에서 항만확장을 검토할 필요가 있다. 본 연구는 추진 중인 항만확장과 관련하여 남측 및 동측의 항만확장안에 대해 선박의 통항안전 및 계류한계파고에 대한 항만 정온도 여부를 제 3세대 수치파랑 모형인 SWAN모형과 강비선형 Boussinesq 방정식을 적용한 불규칙파 Bouss-2D 모형을 적용하여 모형간 특성을 도출한 후 현재안과 각 대안별로 파랑반응특성을 비교분석하였다. 이에 대한 결과는 각 대안별로 장래 항만확장에 대한 기초자료로 활용될 수 있을 것이다.

• Journal of Navigation and Port Research
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• v.34 no.8
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• pp.641-647
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• 2010

Container port development in Korea seems to be based on the policy of balanced regional development rather than demand and supply theory. The problem of overcapacity and low utilization faced by several ports such as Kwangyang, Ulsan New Port and Phohang Youngil New Port can back up this. Furthermore as some ports are located closely sharing the same domestic hinterland the revitalization of the ports is not easy resulting in wasting resources with both regional and national aspect. This study, therefore, aims at providing an empirical results for the container port classification of the 5 ports such as Busan, Kwangyang, Incheon, Pyeongtaek and Ulsan. For this several time series data for the ports such as transshipment containers, import and export containers, origin and destination countries, and local origin and destination are analysed. Based on the results of the analysis the 5 container ports are classified together with their practical roles, and the functional overlap of the port including Phohang was analysed.

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.21 no.2
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• pp.152-166
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• 2022

This study analyzed the causal relationship among operating characteristics of commercial freight vehicles, dangerous driving behaviors, and traffic accident risk. The study applied the existing accident cause and prevention theory to arrive at this relationship. Data related to working characteristics of driver, driving experience, driving ability, driving psychology, vehicle characteristics (size), dangerous driving behavior, and traffic accidents were collected from 303 commercial freight vehicle drivers. Working characteristics and dangerous driving behavior data are based on the driver's digital driving record. The traffic accident data is based on the insurance accident data reflecting actual traffic accidents. First, a structural equation model was built and verified using the model fitness index. Then, the developed model was used to analyze the causal relationship between multiple independent and dependent variables simultaneously. Four dangerous driving behaviors (sudden deceleration, sudden acceleration, sudden passing, and sudden stop) were found to be highly related to traffic accidents. The results further indicate that it is necessary to establish a safety management policy and intensive management for small-sized freight vehicles, drivers with insufficient driving ability, and drivers with dangerous driving behaviors. Such policy and management are expected to reduce traffic accidents effectively.

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2003.05b
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• pp.297-298
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• 2003

대기 광화학반응에서 오존 및 기타 광산화물을 생성하는 VOCs의 경우, 그 물질 자체가 갖는 독성도 물질에 따라 매우 큰 것으로 알려져 있다. 따라서 이와 관련된 많은 연구가 진행되어 왔으며, 이에 대한 규제방안 역시 지속적으로 논의되고 있으나, 이러한 연구 및 정책의 기본 자료인 VOCs의 배출량에 관련된 자료 및 연구가 매우 부실한 실정이다. 또한 이들 연구는 대부분 VOCs의 주요 배출원이라 할 수 있는 도장산업이나 자동차에 집중됨으로써 대기오염이 심각한 도시지역에 소규모로 넓게 분포하고 있는 VOCs의 배출원에 대한 연구가 미진하고, 이에 따라 전체 VOCs의 배출량에 많은 오차를 나타낼 수 있는 조건을 만들고 있다. (중략)

• Electronics and Telecommunications Trends
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• v.28 no.5
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• pp.34-42
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• 2013

대면적 태양전지와 디스플레이용 투명전극으로 지금까지는 투명전도성산화물(TCO: Transparent Conductive Oxide)이 일반적으로 사용되어 왔지만, 성능이 향상된 새로운 소자가 등장함에 따라 현재보다 우수한 광학 특성을 가지면서 낮은 전기저항을 갖는 새로운 투명전극을 개발하기 위한 관심이 집중되고 있다. 다양한 종류의 차세대 투명전극 기술 중 현재 응용 가능성이 가장 높은 투명합성전극(TCE: Transparent Composite Electrode, TCO/금속/TCO 구조) 기술은 단일 층 TCO를 사용하는 것보다 우수한 전기 광학적 특성을 보여주고, 더구나 플라스틱 기판 위에 저온에서도 공정이 가능하기 때문에 새로운 투명전극 기술로 부상하게 되었다. 본고에서는 투명합성전극 기술에 대해 소재의 선택, 전기 광학적 특성, 기계적 열적 습도 안정성과 소자 응용 관련 주요 현황에 대해 살펴보고자 한다.

• Proceedings of KOSOMES biannual meeting
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• 2004.11a
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• pp.13-16
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• 2004

2001년 9월 11일 미국에 대한 항공기 데러 이후 해상화물운송선박 및 항만시설에 대한 해상 테레에 대비하고자 IMO에서 "국제선박 및 항만시설보안 코드(ISPS Code)"를 제정 및 채택하여 2004년1월 1일부터 발효 중이다. 이와 관련하여 선박에서 이를 적용하기 위하여 해운선사에서는 많은 노력을 경주하였으며 보안시스템을 효과적으로 운영하는가에 대한 검증은 선박보안심사를 통하여 이루어지고 있다. 또한 보안시스템을 운영하고자 할 경우에는 회사보안책임자, 선박보안책임자 및 해상종사자에 대한 효과적인 사전교육이 반드시 필요한 실정이다. 따라서 향후 선박보안심사는 ISM 심사와의 차이를 고려하여 시스템의 이해 및 운영, 보안설비 정비, 보안사건 발생시 비상대응 및 시스템활동기록의 검증에 집중하여야 하며 ISM 심사와의 통합형태가 되어야 할 것이다. 또한 선박보안교육의 경우에는 교육기관을 통한 보안교육에만 의존할 것이 아니라 승선 전 및 승선 후 교육을 통하여 보안의식을 고양시키어야 한다.

• Economic and Environmental Geology
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• v.46 no.5
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• pp.445-453
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• 2013

The Uiseong Tapriri Five-Storied Stone Pagoda (National Treasure No. 77) is typical stone cultural heritage in Unified Silla Dynasty, Korea. The pagoda has been occurred black, brown discoloration and microcrack, exfoliation, granularity decomposition with white discoloration because of continuous weathering. As the results of analysis for the contaminants, chemical weatherings are generated that black contaminant by manganese oxide, brown contaminant by iron oxide, white contaminants by gypsum and taranakite. And physical weatherings, such as microcrack, exfoliation, are occurred by salt(gypsum) crystallization. Therefore, these need to remove the contaminants according to the conservation treatment manual, and regular monitoring using P-XRF to preserve long-term the Five-Storied Stone Pagoda at Tapri-ri, Uiseong.