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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.
MODE :TMN 체계의 ATM 망 관리를 위한 관리 객체 개발 환경
강원석,김기형,김영탁,Gang, Won-Seok,Kim, Gi-Hyeong,Kim, Yeong-Tak 한국정보처리학회 1999 정보처리논문지 Vol.6 No.2
Systematic telecommunication network management is essential for operating large-scale integrated networks which consist of various network components manufactured by different vendors. ISO and ITU-T recommend the CMIP-based TMN architecture for this purpose. TMN uses GDMO for the definition of managed objects, and various GDMO compilers have been developed. However, the development of management objects by using these compilers is still a difficult task. In this paper, we present a GUI-based managed objects development environment, MODE. MODE divides managed object codes by system independent code(SIC) and system dependent cede(SDC). By providing development environments for SIC and SDC, MODE can ease the development of managed objects. To show the efficiency of MODE, we develop the managed objects of an ATM switch in MODE. 다양한 통신장비로 구성된 대규모 종합 네트워크를 운용하기 위해서는 이들을 체계적으로 관리할 수 있는 통신망 관리 기술이 필수적이다. 통신망의 체계적인 관리를 위해 ISO 및 ITU-T에서는 CMIP기반의 TMN 권고안을 제정하고 있다. TMN에서는 관리객체를 정의하기 위해 GDMO(Guidelines for the Definition of Managed Objects)를 사용하며, 따라서 GDMO 에이젼트 플랫폼을 개발시 GDMO컴파일러가 필요하게 된다. 본 논문에서는 GUI 기반이 GDMO 관리객체 개발환경인 MODE를 제시한다. MODE는 관리객체 구현을 쉽게 하기 위해 관리객체 코드를 시스템에 독립적인 코드(SIC)와 시스템에 종속적인 코드(SDC)로 나누고 각 코드의 개발을 도와 준다. 실험결괄 MODE를 이용하여 ATM 스위치의 관리 객체를 구현해 보고 MODE의 효용성을 보인다.
송승영(Song, Seung-Yeong),임아람(Lim, Ah-Ram),송진희(Song, Jin-Hee),임재한(Lim, Jae-Han),이규남(Lee, Kyu-Nam),김영탁(Kim, Yeong-Tak) 대한건축학회 2012 대한건축학회논문집 Vol.28 No.11
Recently, curtain wall system has been applied to much more high rise buildings because of its convenience of construction. However, inside surface condensation on the curtain wall systems still has been a problem. The aim of this study is to suggest design criteria to prevent inside surface condensation on the curtain wall systems of office buildings. A variety of criteria including codes, standards and specifications of Korea and other countries were analyzed and the lowest temperature factor of 0.7 for Seoul was suggested as design criteria. In case of thermally-broken aluminum framed curtain wall system, it was shown that double glazing with soft low-e coating, argon gas, thick-walled plastic spacer and triple glazing with thick-walled plastic spacer could meet the design criteria.
응집 , 침전 공정에서 PAC 를 이용한 낙동강 원수의 DOC 제거 및 분자량 분포 특성
김은희,김동윤,임정아,윤정효,김영탁 대한상하수도학회 1999 상하수도학회지 Vol.13 No.1
The objective of present work is to evaluate the optimum coagulation conditions in order to decrease dissolved organic carbon(DOC) and turbidity at different polyaluminum chloride dosage and pH from Nakdong River water. This studies were carried out to examine distribution on apparent molecular weight(AMW) of DOC in the Nakdong River water and its coagulation-sedimentation water. On the basis of jar tests, at the optimum coagulation pH in order to decrease DOC and turbidity were pH 5.0~6.0 and optimum dosage of polyaluminum chloride were 10~15mg Al_2O_3/L. The removal percentage of DOC and UV-254 absorbance were 35~40%, 45~60%, respectively. In pilot plant, at the optimum coagulation pH in order to decrease DOC and turbidity were 5.0-6.5, and the removal percentage of DOC were 30~45%. Distributions of AMW in the Nakdong River, less than 6,800dalton were 60.7% 6,800~11,000dalton were 32.8%, more than 11,000dalton were 6.4%. When the polyaluminum chloride dosage was 12~20mg/L, the removal percentages of each AMW for AMW of Nakdong River water, less than 6,800dalton were 25~28%, 6,800~11m999dalton were 65~68% more than 11,000dalton were 10~60%.