• Journal of the Korean Society of Marine Environment & Safety
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• v.15 no.2
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• pp.119-125
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• 2009

Recently the construction of bridges crossing navigable waterways is being promoted aiming at expanding social infrastructure and optimizing the overland routes through private investment. The construction, however, tends to focus on more the commercial requirements than the marine safety and efficient port management that it has a big risk not only to fail in ensuring the safety of ship traffic, but also to muse some severe conflicts between the parties concerned. These problems result from the lacking of standards about the design guidelines and discussing process considering the marine traffic safety when designing bridges. This research attempts to show the problems mused by bridge construction and suggest the standard discussing process through the survey and process analysis on Kwangyang Bridge and Incheon Bridge.

• Journal of Korea Port Economic Association
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• v.26 no.1
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• pp.259-276
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• 2010

This study shows how Incheon will advance into roadmap as multi-transport hub in Northeast Asia hereafter and be proposed an urgent tasks and roles to construct a multi-transportation system for Incheon, which has both an international airport and port. The multi-transportation point of view of inter-major cities competitiveness of total scores was proposed 1. Shanghai(64.8 points), 2 in Hongkong(64.5), 3 in Incheon(62.9), and 4 in Busan(60.4) and Incheon was estimated to have enough competitiveness to be the international multi-transport hub in Northeast Asia. Sea & Air transportation revealed the most important multi-transportation in the Incheon region. In conclusion, this research suggests a development plan for multi-transportation in Incheon. Firstly, it proposes construction of sea & air transportation distribution center and agreement that simplifies logistic process between Incheon and Tianjin, secondly, suggests to activate project for the purpose of creating a better sea-land transportation system between Incheon and Shanghai.

• Journal of Digital Contents Society
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• v.19 no.7
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• pp.1289-1296
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• 2018

The e-Navigation promoted by the International Maritime Organization is a technology that provides marine-related information necessary for ship and shore side by electronic means for marine safety, security and protecting marine environment. The IHO S-100 standard is a geospatial standard that can express various hydrographic information. Various specifications including S-101 for electronic charts are being developed. In this paper, to help developers who are interested in implementing the technology of S-100, we not only analyze the process to portray the S-100 based data but also implement a case study on S-129 under keel clearance management. The portrayal process consists of data encoding and portrayal engine. Data encoding includes generation of application schema and data set. Portrayal engine is performed by the reform of the generated data set, the XSLT processing, and then the generation of drawing instructions.

• International Commerce and Information Review
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• v.13 no.1
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• pp.97-120
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• 2011

Purpose of this study is to define competitiveness and attribution factors of Busan port on attracting high value added business such as transshipment cargo. Research finds condition to become optimal transshipment port comprises both internal and external circumstances. As for the internal circumstance, scale and location of the distripark as well as port facilities and the rates, for the external circumstance, international network and information technology on logistics managements are providing positive effects. Optimal plans to attract transshipment cargo should include, first, development of total logistics management system from port entry to unloading, transportation, processing, loading to departure. Second, assign port as free trade zone under customs law to attract foreign investment and goods traffic through tax exemption. Third, unless it is illegal, government needs to grant substantial freedom to shift capital for the foreign investors which will lead increase in cargo traffic and foreign investment.

• Journal of Navigation and Port Research
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• v.36 no.5
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• pp.363-370
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• 2012

Recently, International Maritime Organization has been developing e-navigation implementation strategy plan, which is focused on various services for vessel safety navigation. Then, different kinds of software will be developed in maritime area and with this, the quality issues are to be expected becoming more important. In this paper, we adopt software refactoring techniques to reduce the complexity of structure on source code level. It makes software program more effective to understand and modify, without any change of outward behavior. The existing AIS broadcast server program is used as an example for our trial, and calculating coupling and cohesion metric are introduced to analyze the refactoring effect, taking account of the maintainability of IEC/ISO9126 software quality standards.

• Journal of the Society of Naval Architects of Korea
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• v.54 no.2
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• pp.161-169
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• 2017

Recently, ship owners have been requiring the assessment of the maneuverability of twin-screw ships under mechanical failures. Because this kind of assessment has not yet been conducted, it is necessary to study the types of machinery failures that can significantly affect the maneuverability of a ship, and to construct a procedure to simulate the maneuvering behavior under such failures. In this paper, the sole focus is the steering system failure from among the variety of failure types, and the maneuvering behavior of the ship under the single rudder failure is simulated for an investigation of the unique characteristics. First, the mathematical model for the twin-screw container ship is verified by comparing the simulated results for the $35^{\circ}$ turning test, $10^{\circ}/10^{\circ}$ zigzag test, and $20^{\circ}/20^{\circ}$ zigzag test under the normal operating condition with those obtained from free running model tests. After the IMO maneuvering tests are additionally simulated under the single rudder failure, the results are reviewed to investigate the maneuvering characteristics that are due to the failure. Further, the $35^{\circ}/35^{\circ}$ zigzag test and the $35^{\circ}$ turning test are simulated to additionally investigate the effects of the single rudder failure on the steering and turning abilities.

• Information and Communications Magazine
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• v.29 no.11
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• pp.68-74
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• 2012

국내 차세대 이동통신 산업은 1994년 세계 최초 CDMA 상용화에 이은 CDMA2000 및 W-CDMA 구축, 세계 최초 최고의 무선 인터넷 기술인 WiBro기술의 개발 및 보급, 꿈의 통신으로 여겨지는 3.9세대 LTE시스템 구축과 보급으로 세계 최고의 뛰어나 기술력을 가진 산업으로 발전하였다. 이러한 우수한 국내 이동 통신 인프라는 기존의 조선 및 선박과 같은 전통산업과 바이오 및 의료기기와 같은 신산업과의 융합을 통하여 국가 경쟁력 한층 더 향상 시키는데 기여하였다. 또한 휴대폰분야에서도 국내 기업이 세계 최고의 경쟁력을 가진 기업으로 성장하는 등, 차세대이동통신 산업은 타 산업과 달리 기술의 빠른 추종자 (Fast Follower)에서 기술 선도자 (First Mover)로서의 지위를 가지게 되었다. 그러나, 이동통신 시스템 분야에서는 이미 중국 업체가 세계적으로 약진하고 있으며, 휴대폰 분야에서는 선도 기업과의 경쟁 및 견제, 후발 주자인 중국 및 대만 기업의 추격에 직면하고 있다. 한편 국내 휴대폰관련 중소 중견기업은 급격한 단말 환경변화에 따라 많은 어려움에 처해 있다. 따라서 본 논문에서는 차세대 이동통신 기술 선도자로서 지속적인 경쟁력 확보 및 대-중소기업 동반성장 생태계 조성을 통한 모바일 최강국 달성을 위한 이동통신 분야 국가 연구 개발 전략을 제시하고자 한다. 먼저 제I장에서는 차세대이동통신의 개념 및 분류 기준에 대하여 알아보고, 제II장에서는 차세대이동통신에 대한 국내외 현황과 국내 기술 수준 및 기술 경쟁력을 고찰한다. 제III장에서는 기술 선도자로서의 차세대이동통신 분야의 비젼을 제시하고, 이러한 비젼을 실현시키기 위한 국가연구개발 추진 전략을 제시한다. 마지막으로 제IV장에서는 우리나라 이동통신 미래상과 함께 국가연구개발 전략에 대한 결론을 맺는다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.25 no.7
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• pp.974-981
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• 2019

Fine dust has become a significant social problem. Diesel engines are used as the main propulsion power source in ships. This study introduces a diesel particulate filter (DPF) that is used as an exhaust after-treatment system for diesel engines to reduce particulate matter known as diesel fine dust. Two materials are used for the DPF: Cordierite and silicon carbide (SiC). In this study, to improve the physical properties of the binder used in the SiC DPF, cordialite was used instead of the SiC-based materials used as the conventional binder to evaluate the thermal durability against high-temperature deformation through the change of the coefficient of thermal expansion. In addition, the physical properties of the silica sol, as a main component of the base coating solution for determining the bond between the binder and the segment, were confirmed. Based on this, the change effect of the binder physical properties was confirmed through experiments by either adding a silane coupling agent or SiC to increase the reactivity of the silica sol.

• Journal of Navigation and Port Research
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• v.34 no.5
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• pp.337-342
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• 2010

As AIS AtoN has worked an essential role for aids to navigation, the World-wide IALA-Net has announced plans to build the system. Systematic beacon network may offer opportunities to make an infrastructure for information service and upgrade AtoN service performance. This paper proposes Aids to Navigation information service network for e-NAV. Network based on AIS is consist of AIS AtoN channels as Real, Synthetic or Virtual AIS AtoN. And inner network is consist of Wireless networks as AIS, WCDMA, WIFI, WIBRO, USN or VSAT. Introducing of various network systems can lead to combine and design aomong land, beacon and service network infrastructures.

• Korean Journal of Remote Sensing
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• v.15 no.3
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• pp.277-288
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• 1999

The aim of this review is to provide perspectives on the application of remote sensing techniques for observation of marine environmental changes on various spatio-temporal scales. Currently available remote sensing technologies are reviewed and future direction is suggested. For better utilization of remote sensing, a comprehensive plan should be developed by a demand-side and problem-solving approach. Marine environmental changes should be observed on proper spatio-temporal scales where the processes occur. For appropriate observation and monitoring of various environmental changes in coastal regions, more sensors must be utilized. Platforms other than satellites should also be utilized to expand the spatio-temporal scales of observation. Calibration/validation activities, required for accurate interpretation of remotely sensed data, could utilize buoys and ship-of-opportunity sensors. It is desirable that such systems by developed as a part of an integrated monitoring network.