• Proceedings of the Korean Information Science Society Conference
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• 2007.10a
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• pp.146-147
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• 2007

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2000.11a
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• pp.85-128
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• 2000

Strategy ; 경영 의사결정 지원 시스템의 확립, 책임경영 및 성과보상의 명확화, 사업전략과 사업운영의 Seamless한 연계. Process ; ERP 및 Consulting으로부터 제공되는 선진 Best Practice를 바탕으로 업무개선 및 관리 수준의 향상, Best Practice를 통한 ERP Package 구현. System ; 두산 합병에 따른 통합 시스템의 구축(Add-on 개발의 최소화, Segacy System과의 Interface 지향).(중략)

• TTA Journal
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• s.104
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• pp.4-5
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• 2006

SW 산업은 빠르게 성장하는 대규모 산업일뿐만 아니라, 다른 산업을 고도화시키고 새로운 산업을 창출하는 기반산업이다. 이러한 SW 산업이 타산업에 미치는 영향은 최근 들어서 더욱 커지고 있는데, 이러한 현상은 정보기기와 서비스 유형이 더욱 다양해지고 융·복합화 됨에 따라서 이들 정보시스템간에 막힘없는(seamless) 통신의 필요성이 커지기 때문으로 이해된다.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2011.06a
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• pp.1319-1320
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• 2011

• Proceedings of the Korean Society for Technology of Plasticity Conference
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• 2007.05a
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• pp.364-367
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• 2007

Typical seamless tube production methods are an extrusion and a rotary tube piercing. The rotary piercing process is more competitive than the extrusion process form view point of productivity, quality, and flexibility. It consists of twin rolling mills, a pair of disc or flat guides, and a plug. Twin rolling mills are skewed with proper angles in two directions. A round billet is progressively fed forward and rotated due to the rotation of twin rolling mills. Internal crack initiation and growth at central area of the billet are gradually progress because of the repeating actions of tension and rotation. Design variables in the rotary piercing rolling process are the feed angle, the cross angle, the reduction ratio, and the position of plug. In this work, a rotary tube piercing machine was developed and parametric studies on design variables were carried out using finite element analysis. The Brozzo ductile fracture criterion was utilized to determine an internal crack initiation.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.1
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• pp.15-20
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• 2010

This paper proposes a multihoming-based vertical handover scheme using Proxy binding update to minimize handover delay and packet loss while a mobile node moves to a heterogeneous access network. When a mobile node moves to a heterogeneous access network, the proposed scheme can provide a mobile node with fast and seamless handover by performing layer-3 handover using its new interface while the other interface is still communicating in the old access network. The proposed Proxy binding update is different from the Mobile IP binding update in that it includes home addres (HoA) of the old interface instead of the new interface. The performance analysis shows that the proposed scheme can efficiently reduce vertical handover delay and packet loss.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.3
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• pp.327-333
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• 2013

In this paper, we propose a QoS information collection method at the information server in maritime networks with multi-network interfaces, and a route selection scheme based of the measured predictive QoS information comparing with parameters requested from a mobile node in a ship entering into a harbor from near-shore area. By changing network conditions and applying various application bandwidths, we check the operation of our proposed scheme and measure its performance of the original and proposed schemes in the viewpoints of the received packet traffic and end-to-end delays.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2012.05a
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• pp.577-580
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• 2012

Communication environment has rapidly evolved into All-IP based core network, which is centered on a variety of access network, and develops into ubiquitous environment for each user due to the development of multiple interface terminals and the spread of contents usage. Especially, mobile streaming technologies and integrated authentication technologies are needed for mobile users to provide seamless mobility. The technology for seamless mobility services is an important issue. In this paper, the IEEE 802.21 MIH information server is based on the network offering handover technology between heterogeneous network.

• Journal of Korea Game Society
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• v.12 no.3
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• pp.69-76
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• 2012

At MMORPGs that has the numerous game users with many interactions at the same virtual world, massive loading that results in delays, resource shortages, and other such problems occur. To solve this, many developers devote research to load-balancing servers, yet due to steady and dynamic map divisions, such research is unreliable. This paper proposes a game user-oriented load balancing scheme for the load balancing of MMORPG servers. This scheme shows effectiveness at dealing with hot-spots and other gatherings of game users at specific servers compared to previous methods.

• Journal of Korea Multimedia Society
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• v.23 no.10
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• pp.1258-1269
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• 2020

The IoT(Internet of Things) service provides users with valuable services by collecting and analyzing data using Internet-connected IoT devices. Currently, IoT service platforms are accomplished by using edge computing to reduce the delay time required to collect data from IoT devices. However, if a user moves to another network with IoT device, the connection will be lost and IoT service will be suspended. To solve this problem, we proposes a service that automatically roaming IoT service when IoT device makes move. IoT roaming service provides a device automatic tracking management technique designed to continue receiving IoT services even if users move to other networks. To check if the proposed roaming service was effective, we implemented IoT roaming service and measured the data transfer time while move between networks along with devices while using IoT service. As a result, the average data transfer time was 124.62ms, and the average service interrupt time was 812.12ms. with this result, we can assume that the user could feel service interruption time very shortly and it will not affect the service experience. with IoT roaming service, we expect that it will present a method that stably providing IoT services even if user moves networks.