• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.1586-1589
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• 2005

GUMF (Global User Management Framework) that is proposed in this research can be applied to next generation network such as BcN (Broadband convergence Network), it is QoS guaranteed security framework for user that can solve present Internet's security vulnerability. GUMF offers anonymity for user of service and use the user's real-name or ID for management of service and it is technology that can realize secure QoS. GUMF needs management framework, UMS (User Management System), VNC (Virtual Network Controller) etc. UMS consists of root UMS in country dimension and Local UMS in each site dimension. VNC is network security equipment including VPN, QoS and security functions etc., and it achieves the QoSS (Quality of Security Service) and CLS(Communication Level Switching) functions. GUMF can offer safety in bandwidth consumption attacks such as worm propagation and DoS/DDoS, IP spoofing attack, and current most attack such as abusing of private information because it can offer the different QoS guaranteed network according to user's grades. User's grades are divided by 4 levels from Level 0 to Level 3, and user's security service level is decided according to level of the private information. Level 3 users that offer bio-information can receive secure network service that privacy is guaranteed. Therefore, GUMF that is proposed in this research can offer profit model to ISP and NSP, and can be utilized by strategy for secure u-Korea realization.

• Proceedings of the Korean Information Science Society Conference
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• 2003.10c
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• pp.169-171
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• 2003

최근 임베디드 컴퓨팅의 눈부신 발전으로 개인이 사용하는 PC의 단위는 점점 작아지는 추세에 있으며 이로 인해 소형 컴퓨터와 단말기에 대한 수요가 증가하고 있다. 하지만 시스템의 소형화로 인해 이러한 시스템들은 일반적인 애플리케이션은 물론 동영상과 같은 미디어 데이터를 처리할 만한 성능을 갖지 못하게 되었다. 본 논문은 VNC(Virtual Network Computing)를 이용하여 다양한 운영체제를 기반으로 미디어 데이터의 처리 성능을 측정하여 비교 연구를 하였다. 이를 통해 멀티미디어 서비스에 적합한 플랫폼을 제시하고 향후 씬클라이언트 컴퓨팅의 개발 방향을 제안하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04a
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• pp.421-423
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• 2004

서버기반 컴퓨팅을 가능하도록 해주는 씬클라이언트 컴퓨팅에 관한 연구와 상품화는 지속적으로 진행되어 오고 있다. 하지만 지금까지 개발되어 온 씬클라이언트는 단순히 텍스트 위주의 컴퓨팅 성능만을 고려하여 개발될 뿐 게임 등 멀티미디어에 대한 성능은 고려하지 않는다. 따라서 기존의 씬클라이언트 컴퓨팅 환경에서의 미디어 재생은 화질이 너무 열악하여 정상적으로 미디어 서비스를 즐기기에는 많이 부족한 실정이다. 본 논문은 리눅스를 기반으로 한 씬클라이언트 컴퓨팅 환경에서 미디어를 재생했을 때 기존 씬클라이언트 컴퓨팅에 비해 화질(Video quality)을 향상시키는 연구를 진행하였다. 제안된 방법을 씬클라이언트 컴퓨팅의 대표적인 기술인 VNC(Virtual Networking Computing)와 성능 비교한 결과 동일한 대역폭 사용으로 로컬 재생 수준의 화질을 보여주는 성능 향상이 가능하였다.

• Biomedical Science Letters
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• v.29 no.4
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• pp.330-335
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• 2023

The corazonin (Crz) gene showed two subtypes of different length at laval and pupal stage. The long subtype fade out in adult central nerve system (CNS) but the short one survive through all the life cycle from larva to adult. The short subtype has the same base sequences with mature Crz mRNA and detected in both brain and ventral nerve cord (VNC). The long one, on the contrary, was detected only in the brain tissue. As observed in above results, Crz neurons develop in different pattern in the CNS of scuttle fly and the Crz gene expresses two different subtypes. These results suggest that this neurotransmitter may perform differential neurophysiological functions in the scuttle fly. Variation in the amino acid composition of the final active undecapeptide supports in strong those possibilities. We expect further studies on the relationship between neurophysiological functions of Crz and behavioral characteristics of the scuttle fly.

• Proceedings of the KSME Conference
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• 2004.11a
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• pp.166-171
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• 2004

Since early 1950's fracture mechanics has brought significant impact on structural integrity assessment in a wide range of industries such as power, transportation, civil and petrochemical industries, especially in nuclear power plant industries. For the last two decades, significant efforts have been devoted in developing defect assessment procedures, from which various fitness-for-purpose or fitness-for-service codes have been developed. From another aspect, recent advances in IT (Information Technologies) bring rapid changes in various engineering fields. IT enables people to share information through network and thus provides concurrent working environment without limitations of working places. For this reason, a network system based on internet or intranet bas been appeared in various fields of business. Evaluating the integrity of structures is one of the most critical issues in nuclear industry. In order to evaluate the integrity of structures, a complicated and collaborative procedure is required including regular in-service inspection, fracture mechanics analysis, etc. And thus, experts in different fields have to cooperate to resolve the integrity problem. In this paper, an internet-based cooperative system for integrity evaluation system which adapts IT into a structural integrity evaluation procedure for reactor pressure vessel is introduced. The proposed system uses Virtual Reality (VR) technique, Virtual Network Computing (VNC) and agent programs. This system is able to support 3-dimensional virtual reality environment and to provide experts to cooperate by accessing related data through internet.