• Proceedings of the KSR Conference
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• 2004.06a
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• pp.1374-1378
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• 2004

Railway conflict detection and resolution problem (RCDRP) involves complicated field constraints that should be considered for practical service. In this paper, we address those constraints in brief. Particularly, following situations are addressed; (1) temporal change of network topology, (2) consideration of diverse conditions of track and train, for example, single/double tracks and passenger/freight service, (3) siding capacity limitation, (4) bidirectional sides used by both inbound and outbound trains, (5) regulation for passenger transfer service, (6) consideration of siding length, (7) Restriction on stopping before the track segment with steep slope.

• Journal of Contemporary Eastern Asia
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• v.12 no.1
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• pp.35-47
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• 2013

During the last a few decades, internationalisation of universities has emerged as an important issue not only in developed countries but in developing countries. South Korea as a fast catch-up country has experienced a remarkable change in its higher education system. This change is largely related to the South Korean government's higher education policy and to economic developmental stages. Against this backdrop, in order to assess the internationalisation of Korean higher education, we focus on international student mobility rather than other criteria such as infrastructure or programmes for international students and faculties. According to the recent statistics, the number of inbound foreign students involved in Korean higher education has increased significantly since 2005. Nevertheless, compared to other OECD and Asian countries, the number of outbound students in Korean higher education is high, whereas the number of inbound foreign students in higher education in Korea is very low. Against these observations, Korean government's recent policies and efforts of Korean universities to improve internationalization are discussed. Finally, some policy implications are put forward.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2013.10a
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• pp.196-198
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• 2013

Navigation of ships is mainly being performed through high sea, but inbound/outbound vessels to a port are characteristic of going via territorial sea of coastal countries. At territorial sea, all ships are under the influence of korea' sovereignty and enjoy innocent passage on the basis of UN Convention on the Law at the Sea(UNCLOS). But in the practical points of view, we want to examine legally on these issues, because we have no clear criteria for reasons about anchor except anchorage and innocent passage at territorial sea prescribed at national laws, moreover it can be used maliciouly.

• Journal of Korean Institute of Industrial Engineers
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• v.35 no.2
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• pp.129-140
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• 2009

This paper introduces the planar storage location assignment problem (PSLAP) that no research has attempted to mathematically solve. The PSLAP can be defined as the assignment of the inbound and outbound objects to the storage yard with aim of minimizing the number of obstructive object moves. The storage yard allows only planar moves of objects. The PSLAP usually occurs in the assembly block stockyard operations at a shipyard. This paper formulates the PSLAP using a mathematical programming model, but which belongs to the NP-hard problems category. Thus this paper utilizes an efficient genetic algorithm (GA) to solve the PSLAP for real-sized instances. The performance of the proposed mathematical programming model and developed GA is verified by a number of numerical experiments.

• Proceedings of the Korea Information Processing Society Conference
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• 2005.11a
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• pp.901-904
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• 2005

인터넷이 생활과 밀접하게 연결되면서 인터넷에 대한 공격이 엄청난 피해를 야기시킬 수 있게 되었다. 웜은 스스로를 복제하여 인터넷 상의 취약한 호스트들을 공격하여 여러가지 피해를 야기시키고 있다. 웜을 탐지하고 방어하기 위해 inbound/outbound 스캔률 검사, 웜 시그니처 검사와 같은 네트워크 기반 침입탐지 방법과 웜 생성 파일 검사, 파일 무결성 검사와 같은 호스트 기반 침입탐지 방법이 제안되었다. 하지만 단일 시스템에서의 웜 탐지는 한계가 있을 뿐만 아니라 대응에 있어서도 더딜 수 밖에 없다. 본 논문에서는 웜 탐지 시스템을 분산 배치시킴으로써 탐지의 정확성을 확보하였고 웜 경보를 모든 웜 탐지 시스템에 송신함으로써 대응에 있어 신속성을 제공해준다. 뿐만 아니라 취약성 데이터베이스를 통해 최신으로 갱신만되어 있다면 제로데이 공격에도 대응할 수 있는 메커니즘을 제공한다.

• Journal of Korea Society of Digital Industry and Information Management
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• v.7 no.4
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• pp.67-73
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• 2011

We developed a RFID system to effective management and monitoring for school assert. In this paper, RFID system implemented a two way which are control to 13.56MHz for in/outbound order and 2.45GHz for positioning tracking and monitoring. We also make up the contents and database utilizing the labview tool in pc. In addition, the developed system can obtain simultaneously the information from several RFID reader at real time so that it is possible to track the position system, the path moving and the status of asserts in the school. Especially, 2.45GHz system has a function to prevent a assert theft. It is observed from the various and practical experiment that the proposed system is useful for assert management and monitoring.

• Journal of Korean Port Research
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• v.13 no.2
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• pp.255-266
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• 1999

The purpose of this paper is to describe the design of the decision support system for container terminal ship planning and to introduce the implemented system. The ship planning in container terminals consists of three major decision processes -the working schedule of gantry cranes the discharging sequence of inbound containers the loading position and sequence of outbound containers. For making these decision the proposed system can provide two ship planning modes the interactive planning mode with user-friendly GUI and the automated planning made. To implement the automated planning routine we acquired the planning rules from the expert planner in container terminals and developed an expert system based on the rules. Finally we evaluated the system developed and the potential for commercialization by using container terminal data.

• Journal of the Korea Society of Computer and Information
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• v.13 no.7
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• pp.281-289
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• 2008

In this study, a discrete-event simulation model is developed to estimate load factors and the corresponding revenues under different pricing and dispatching policies. The model has been employed to forecast the inbound and the outbound air cargo demands of the major Northeastern Chinese cities, and the simulation results were compared to the actual demands obtained from real-life airline operations. The statistical analysis confirms that the simulation model is able to provide accurate estimates for air cargo demands, and thus, the model may be employed to be a useful tool for air cargo demand management.

• Journal of the Korean Society of Marine Environment & Safety
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• v.2 no.1
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• pp.11-33
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• 1996

This work aims at examining the navigational safety of the entrance channel of Inchon harbour and suggesting the way to improve ship's navigation of the navigational safety at Inchon, that small ships such as fishing boats and barges coming out of the harbour through the East Channel cause major threat to the inbound large ships using the channel. An additional new waterway, therefore, has been recommended to be established in the middle of the East and West Channels so that the outbound small ships can use it. A waterway design simulation methodology has been applied to examin the sagety of the newly suggested channel. Minor chansge has been made to the original design after the simulation experiment, and the corrected final design of the waterway has been suggested to be implemented as soon as possible.

• Journal of Korean Institute of Industrial Engineers
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• v.41 no.5
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• pp.511-520
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• 2015

Inventory, cost, and the level of service are three interrelated key metrics that most supply chain organizations are striving to optimize. One way to achieve this goal is to create a simulation model to conduct sensitivity analysis and optimization on several different supply chain policies that can be implemented in actual operation. In this paper, a case of Xerox global supply chain modeling and analysis to assess several "what if" scenarios for the consumable policy safety stock is presented. The simulation model, combined with analytical cost model and optimization module, is used to optimize the policy safety stock level to achieve the lowest total value chain cost. It was shown quantitatively that the policy safety stock can be reduced, but it is offset by the inbound premium transportation cost to expedite supplies in shortage, and the outbound premium transportation cost to send supplies to customers via express shipment, requiring fine balance.