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B-ISDN 및 N-ISDN에서의 멀티미디어 서비스 연동
정연기,김영탁,손윤구,Jeong, Yeon-Gi,Kim, Yeong-Tak,Son, Yun-Gu 한국정보처리학회 1994 정보처리논문지 Vol.1 No.3
64 Kbit/s을 기반으로 하는 N-ISDN에서의 멀티미디어 서비스와 ATM을 기반으로 하는 B-ISDN에서의 멀티미티어 서비스 간의 연동방안을 제시한다. 먼저 멀티미디어 서비스 제공을 위한 프로토콜 기능구조를 분석하고, 멀티미디어 서비스 연동을 위한 각 프로토콜 계층 기능을 제시하며, 64 Kbit/N-ISDN에서의 멀티미디어 서비스 제공 구조를 살펴본다. 그리고 B-ISDN에서의 멀티미디어 서비스 제공을 위한 ATM 프로토콜 기능을 분석한다. 특히 B-ISDN에서의 4가지 서비스 유형에 대한 ATM 적응 계층 및 상 위 계층과의 정합기능을 분석한다. 64 Kbit/s N-ISDN간의 멀티미디어 서비스 연동을 위한 기능구조를 제안한다. 또한 멀티미디어 통신을 위한 각 미디어별 연결 특성에 따른 연결 설정 방안 및 연동 방안을 제시한다. Interworking architecture and scenarios are analyzed and proposed for seamless provision of multimedia services across 64 kbit/s-based N-ISDN and ATM-based B-ISDN. First, the functional architecture of multimedia service is analyzed, and the functions of each protocol layer are proposed. The architecture of multimedia services in N-ISDN is studied, and the functions of ATM protocol for multimedia services in B-ISDN are analyzed. We propose the interworking architecture of multimedia services across 64 kbit/s-based N-ISDN and ATM-based B-ISDN.
두경부 편평세포암종에서 VEGF(vascular endothelial growth factor)의 발현 및 신생혈관생성
정연기,이형석,박철원,강미정,박용욱,박찬금,장세진,태경,Jeong, Yeon-Gi,Lee, Hyung-Seok,Park, Chul-Won,Kang, Mee-Jeong,Park, Yong-Uk,Park, Chan-Kum,Jang, Se-Jin,Tae, Kyung 대한기관식도과학회 2002 大韓氣管食道科學會誌 Vol.8 No.1
Background and Objectives : Angiogenesis within malignant tumors has been considered to be essential for the growth and expansion of cancer cells, especially for solid tumors, and has been implicated in the overall growth and metastases of tumors. Such angiogenesis within tumors depends upon the secretion of vascular growth factor to allow the growth of newly formed vessels from peripheral tissue into the malignant tumor. %n, an exploration of the relations between cancer cells and vascular growth factors is absolutely critical to understanding the growth of malignant tumors. According to recent reports, vascular endothelial growth factor(VEGF) has been found to play a role in lymphatic metastases, tumor recurrence and survival in various human tumors. To evaluate the role of VEGF in head and neck squamous cell carcinoma(HNSCC) we performed this study. Materials and Methods : We examined the expression of VEGF and microvessel density in 39 HNSCC by immunohistochemistry and correlated them with various clinical data such as stage, cervical lymphatic metastasis, recurrence, and overall survival. Results : The expression of VEGF was not correlated with overall stage, T stage and N stage. There was no statistical correlation between the expression of VEGF and recurrence in the Primary site, cervical lymph node, and the distant metastases. There was no statistical correlation between the expression of VEGF and microvessel density. Conclusion : Based on these results, it is suggested that the expression of vascular endothelial growth factor is not a major prognostic factor for head and neck squamous cell carcinoma. Further studies are needed to evaluate significance of VEGF expression in head and neck squamous cell carcinoma.
鄭淵基 경일대학교 산업기술연구소 1994 産業技術硏究所 論文集 Vol.4 No.-
In this paper we propose a protocol for improving performance of IEEE 802.6 MAN by more efficient use of bandwidth. This paper presents a method that every node enables to identify the ACF(Access Control Field) of the used slots, and that the erasure node has with the functions of slot-type release. We used simulation to study the throughput performance and demonstrated that the maximum throughput offered by the proposed protocol may be greater than that of the DQDB in different environments. The proposed protocol improves the slot utilization and the unfaimess. The results are tested by simulation of the proposed DQDB protocol which demonstrates a realistic improvement of 30% with only 1 erasure node.
鄭淵基 慶一大學校 1990 論文集 Vol.6 No.1
This paper studies the parallelization schemes of the simulated annealing algorithm for fast processing multiprocessor systems. The basic ideas, structure and general characteristics of the simulated annealing are reviewed. The previously proposed parallel annealing schemes are categorized into three decomposition approaches: decomposition by functions, decomposition by objects and decomposition by Markov chains. Each decompositionstrategy is discussed for its suitable multiprocessor architecture and application fields. As an example of efficient parallel annealing algorithm on message passing multiprocessor systems, the systolic annealing algorithm is introduced in detail. This paper also presents and analyses the experimental results of the systolic annealing algorithm on a multiprocessor system with a larger number of processors.
TINA 체계의 망관리 시스템과 GUI의 연동 방안 및 구현
鄭淵基 경일대학교 2001 論文集 Vol.17 No.-
In this paper, we suggest interworking schemes between TINA systems and GUIs. We also design and implement prototype of a performance management GUI to test interworking between TINA systems and the performance management GUI. After we unify the implemented GUI and a performance management component, have monitored traffic about an arbitrary port of FORE ATM ASX200 switch. As a cycle time and a term are typed through the GUI, Monitoring is started. And monitored results are displayed as graph type on CRT.
TINA 기반의 망관리 시스템에서 웹 리포팅 인테페이스 구현 방안
鄭淵基,李振鎬 경일대학교 2001 論文集 Vol.17 No.-
In this paper, we suggest the WRI (Web Reporting Interface) to generate network management reports in TINA (Telecommunication Information Networking Architecture) based network management system. The wealth of data describing network environment is contained in database. The WRI provides functionality that allows users to access this data in order to generate reports, perform trend analysis, plan network infrastructure changes, etc. When users configure web reports, the WRI queries the Database for users, and generates various reports of performance management and fault management.