• Computational Structural Engineering
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• v.6 no.4
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• pp.83-88
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• 1993

A time-discontinuous Galerkin method based upon using a finite element formulation in time has evolved. This method, working from the differential equation viewpoint, is different from those which have been generally used. They admit discontinuities with respect to the time variable at each time step. In particular, the elements can be chosen arbitrarily at each time step with no connection with the elements corresponding to the previous step. Interpolation functions and weighting functions are taken to be discontinuous across inter-element boundaries. These methods lead to a unconditional stable higher-order accurate ordinary differential equation solver.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.655-657
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• 2004

IPv4가 가지는 주소 부족 및 보안등의 문제들로 인하여, 인터넷 환경은 IPv6로 전이가 이루어지고 있다. 또한 노트북 및 PDA등 단말들이 소형화, 간편화되면서 단말의 이동성 문제가 쟁점화 되고 있다. 이러한 오늘날의 인터넷 환경에서. IPv4에서 IPv6로의 전이 환경에서의 두 프로토콜의 연동을 위해 여러 메커니즘들이 소개되고 있으며 단말의 이동성 제공을 위해 IPv4 기반으로는 이동 IPv4(Mobile IPv4)가 표준으로 제정되었으며 IPv6 기반으로는 이동 IPv6(Mobile IPv6)가 현재 표준 제정 완료 단계에 있다. 따라서 본 논문에서는 전이 환경에서 이동성 지원을 위하여 이중스택 메커니즘을 사용한 이동 IPv4와 이동 IPv6의 연동 문제 해결 방안에 대해 모색해본다.

• Journal of the Korean Professional Engineers Association
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• v.29 no.3
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• pp.94-104
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• 1996

When Broadband Integrated Services Digital Network(BISDN) becomes commercially available In public network, conventional Local Area Network(LAN)s will still be in use. The first wide spread application for B-ISDN will be the interconnection of LANs. The equipment providing the connection between the LAN and the BISDN will be given the general name Inter Working Unit(IWU). We addresses the congestion problem of many interworking issues. In this paper, Our study is concentrated on applying connectionless network protocol for interworking. We suggest a rate control method in the network layer to prevent a buffer overflow in the IWU. Since this rate control method can be applied to prevent buffer overflow in a congested IWU, We investigate the use of rate control to solve congestion problems of IWU and parallize network layer with rate control to lessen the congestion problem in IWU.

• The Journal of Fisheries Business Administration
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• v.43 no.2
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• pp.15-26
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• 2012

This study aimed to examine the establishment of the fish-paste processing industrial cluster in Busan. In order to successfully promote the fish-paste processing industrial cluster in Busan, first of all, it is required to implement various fish-paste processing related infra-structures and foundations. In addition to this, the agreements among fish-paste processing related organizations and businesses are inevitable to secure plans of inter-working with fisheries policies, to make efficient conditions for the stable supply of raw materials, and to pursue various supports from central and local governments for a viable development of fish-paste processing business companies in Busan.

• Proceedings of the KSR Conference
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• 2007.05a
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• pp.653-660
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• 2007

South and North Koreas are putting forth efforts to overcome the distrust and animosity of the past 50 years to open an era of harmony and cooperation where the two halves can work together for mutual benefits. As part of those efforts, both parties are working now to reconnect the railways between the North and the South that remained broken for the past 60 years. The South and North have had different railway systems for more than 50 years. To solve these complicated issues, appropriate investigation and analysis of North Korea railway system should be proceeded. It is necessary to study the railway system and integration methodology for effective operation of the two korea's railway systems. Therefore, in this study, effective unification scheme of South and North Korea railway system is proposed based on appropriate investigation about operation of inter-Korea railway system.

• Proceedings of the Technology Innovation Conference
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• 1999.12a
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• pp.255-278
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• 1999

R&D association is a very important institution to promote inter-firm technological cooperation, In Korea, they have begun to be established in 1982, and at now 56 R&D associations are working. The purpose of this study is In analyze the problems of the R&D associations, and to suggest a new direction of their future development Their problems were analyzed from the perspective of cooperative R&D mechanisms, especially with a new concept of R&D community : search community, planning community, community of research itself. This study emphases the importance of the R&D association's role as a planning community, and the institutional linkage between R&D association and National R&D program through the introduction of design-in planning system.

• Journal of Korea Society of Digital Industry and Information Management
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• v.12 no.1
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• pp.13-26
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• 2016

Service and technology for the future hyper-connected society, which is every information receive through the mobile internet, will be an Internet of Things. Thus, it is mandatory to derive key standardization work item and establish strategy for the global business with the standardization of device and service platform by the application service. In this study, by analyzing the domestic and international market trends, state of technical development, and standardization of technology, we identified the open platform is the stepping stone for achieving the goal which is establishing the virtuous circulation of IoT ecosystem. Also, we defined emphasized key standardization work item for achieving the open platform are network, server, access authentication, billing system, and software platform. After that, we proposed future strategy direction of standardization. This research could be contribute to the IoT service diffusion by realizing IP communication among low power wireless terminals and implementing light-weight standard internet protocol.

• Proceedings of the Korea Information Processing Society Conference
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• 2000.10b
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• pp.1095-1098
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• 2000

본 논문에서는 프레임 릴레이(Frame Relay: FR) 망과 ATM(Asynchronous Transfer Mode) 망이 연 동시 연동장치(InterWorking Unit: IWU)의 프레임에 대한 지연시간을 분석하였다. ATM과 FR 사이의 데이터 처리속도의 차이는 연동장치에서 큐 현상을 야기시키므로, 프레임이 처리되기 위해서 기다리게 된다. 본 논문에서는 지연시간을 해석적으로 분석하여 이를 시뮬레이션을 통해 검증하였다. 그 결과 FR 연결된 수가 선형적으로 증가할수록 연동장치에서 프레임의 지연시간은 지수적으로 증가함을 알 수 있었다. 따라서, 이러한 분석 결과를 통해서 FR과 ATM 사이에 있는 연동장치를 구현할 때, 전송된 프레임을 처리할 timeout의 시간을 결정하여 프레임을 재전송 할 수 있는 시간을 결정하는데 도움이 될 것으로 사료된다.

• Proceedings of the KIEE Conference
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• 2006.10a
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• pp.73-74
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• 2006

Carbon nanotubes (CNTs) have recently attracted great attention because of their excellent physical properties, such as high mechanical strength, thermal stability, and electronic properties. These useful properties of carbon nanotubes make themselves good candidates for various application field, such as a transistor, battery, field emission display, nanoscale inter-connects, and so on. Gas-phase techniques offer the unique ability to synthesize well-oriented arrays of CNTs. However, it is seldom reported that the pressure influences on the growth of CNTs under low substrate temperature. In this work, the effect of the working pressure and the influence of the catalyst preparation on the properties of CNTs grown by microwave plasma chemical vapor deposition (MPCVD) were investigated.

• The Transactions of the Korea Information Processing Society
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• v.6 no.10
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• pp.2740-2751
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• 1999

Critical to more widespread use of Internet telephony are the smooth interoperability with the existing telephone network and the improved quality of voice connections. Of these requirements, this interoperability comes through the use of Internet Telephony Gateway's which perform protocol translation between an IP network and the Public Switched Telephone Network. In this paper, we have focused on the necessity and possibility of interoperability, and furthermore derives the necessary requirements for interoperability between IP networks and PSTN. For this purpose, we have analyzed the signaling protocols for gateway system. Then, we have modelled the inter-working part using the Petri-Net model. Through reachability trees of the Petri-Net model, we have confirmed that interoperability is possible, and that characteristics of deadlock, liveness, and boundness are satisfied.