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정규정,이동호,Jung, Kyu-Jung,Lee, Dong-Ho 한국정보처리학회 2003 정보처리학회논문지 C : 정보통신,정보보안 Vol.10 No.1
The network performance gets down during congestion periods to solve the problem effectively. A RED(Random Earl Detection) algorithm of the queue management algorithm is proposed and IETF recommends it as a queue management. A RED algorithm controls a congestion aspect dynamically. In analyzing parameters when static value of parameter is set in the gateway cannot be handled the status of current network traffic properly We propose the Effective RED algorithm to solve with the weakness of RED In this algorithm the maximum drop probability decides to accept or drop the interning packets, is adjusted dynamically on the current queue state for controlling the congestion phase effectively in the gateway. This algorithm is confirmed by computer simulation using the NS(Network Simulator)-2. 혼잡상황이 발생한 후에는 네트웍 성능이 급격하게 떨어지게 되는 문제점을 해결하고자 큐 관리 알고리즘으로 RED(Random Early Detection) 알고리즘이 제시되었으며, 현재 RED 알고리즘이 표준으로 사용되고 있다. RED 알고리즘은 게이트웨이에서 능동적으로 대처할 수 있는 알고리즘이다. 그러나, RED 매개변수 분석을 통하여 고정된 매개변수 값을 사용할 경우, 현재 네트웍 트래픽 상태에 적절히 대처하지 못하는 문제점을 가지고 있다. 본 논문에서는 기존의 RED 알고리즘의 문제점인 고정된 매개변수 값 설정으로 인한 문제점을 해결하기 위하여 개선된 RED 알고리즘을 제안한다. 제안된 알고리즘에서는 현재의 네트웍 트래픽 상태에 따라 패킷 폐기 확률 값을 조성하여 게이트웨이에서의 혼잡 상황을 효율적으로 제어하도록 하였다 그리고, NS를 이용하여 개선된 RED 알고리즘의 성능을 검증하였다.
정규정(Kyu-Jung Jung),이동호(Dong-Ho Lee) 한국정보과학회 2002 한국정보과학회 학술발표논문집 Vol.29 No.1A
기존의 네트워크에서는 혼잡상황이 감지된 이후에 네트워크 성능이 급격하게 저하된다. 이러한 문제를 해결하고자 RED(Random Early Detection)기법이 소개되어 게이트웨이에서 혼잡상황에 대하여 능동적으로 대처할 수 있는 알고리즘이 제시되었다. 하지만, RED는 매개변수 설정이라는 문제가 남아있다. 그리하여, 잘못된 변수값 설정으로 인한 네트워크 성능 저하가 현저하게 발생한다. 본 논문에서는 기존의 RED를 개선한 Effective RED를 제안한다. Effective RED는 RED 알고리즘의 문제점을 개선하여 네트워크의 상황에 맞추어 동적으로 매개 변수 값을 조정하는 알고리즘이다. 그리고, ns를 이용하여 Effective RED의 성능을 검증하였다.
정규정 ( Chung Kyu-jung ),이송 ( Lee Song ) 한국구조물진단유지관리공학회 2010 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.14 No.1
The object of this study is to establish a leakage safety management method for Juam Dam, a central cored rockfill dam in Korea, after appreciating the behavoral characteristics of the leakage monitoring data. In the water leakage monitoring of fill dam, the generation of abnormal water leakage is difficult to directly detect due to the effect of outside factors such as the component of precipitation inherent in the observation value. Therefore, conventionally estimation methods of water leakage quantity are applied by multiple regression analysis considering reservoir water level, precipitation, etc.. However, the estimated error of precipitation component is relatively big in these method. This paper identifies the water leakage quantity estimation formula linked to reservoir water level which is not directly affected by precipitation through the hydrograph separation analysis, and proposes a leakage management method.
정규정(Chung, Kyu-Jung),장중렬(Jang, Jung-Ryeol),김대호(Kim, Dae-Ho) 한국구조물진단유지관리학회 2011 한국구조물진단학회 학술발표회논문집 Vol.15 No.1
The applicability of existing rock cover criteria for concrete lining pressure tunnels has bee reviewed in this paper and limitations placed based on site geology and any other site specific characteristics. Because the geological factors may occur great difficulties in operating pressure tunnels, it was necessary to fully recognize this factors at tunnel design and construction stages.
심윤태 ( Sim Yun Tae ),김경진 ( Kim Gyeong Jin ),정철수 ( Jung Cheol Soo ),정규정 ( Jung Kyu Jung ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
This paper has a seepage measuring device installed on the water retaining wall at the bottom of the dam, but it has no seepage count and periodically uses underground water handling method to measure the level of seepage. Accordingly, observation of seepage quantities generated by the dam body is used as an important data to assess the safety of the dam body, so it is considered to improve the seepage quantity measuring device.
이종근 ( Lee Jong Keun ),김응관 ( Kim Eung Kwan ),문태남 ( Moon Tae Nam ),정규정 ( Jung Kyu Jung ) 한국구조물진단유지관리공학회 2018 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.22 No.1
Hydrologic and Physicochemical properties are the properties of water, defined by physicochemical properties such as water temperature, electrical conductivity, pH and the concentration of inorganic ions. Although it is difficult to directly identify the cause of seepage through hydrologic and physicochemical analysis, it can be used as indirect data to estimate the origin of leakage.
추진호 ( Choo Jin Ho ),하재석 ( Ha Jae Seok ),방돈석 ( Bang Don Seok ),정규정 ( Chung Kyu-jung ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
Recently, there are few cases of the Precise Inspection for Safety and Diagnosis for transverse crack of CFRD. The presumable causes and characteristics of transverse cracks have suggested in this paper based on field survey and related NDT. Also, the maintenance of transverse crack of CFRD are proposed.
상수관망에서의 전략적인 관 상태평가 및 개량 우선순위 산정을 위한 관 파손율 모델구축에 대한 연구
구문수 ( Koo Moon-soo ),이재성 ( Lee Jae-sung ),정규정 ( Chung Kyu-jung ) 한국구조물진단유지관리공학회 2017 한국구조물진단유지관리공학회 학술발표대회 논문집 Vol.21 No.1
According to this research, it was confirmed that safety coefficient is useful tool to rationally quantify structural deterioration of pipe. In addition, it could perform simple and rapid evaluation escaping from confinement by time and budget, and it can be utilized as a tool to set up policy for future water supply.
양동석(Yang, Dong-Suk),김용수(Kim, Young-Soo),정규정(Chung, Kyu-Jung),김훈(Kim, Hoon),안상로(Ahn, Sang-Ro) 한국구조물진단유지관리학회 2009 한국구조물진단학회 학술발표회논문집 Vol.2009 No.1
Structural health monitoring(SHM) and damage identification are assuming larger and larger importance in civil engineering, SHM is defined as the use of in-situ, non-destructive sensing and analysis of structural characteristics in order to identify if a damage has occurred, define its location and estimate its severity, evaluate its consequences on the residual life of the structure. This paper studied the safety management network system of infrastructure which constructed smart sensors, closed- circuit television(CCTV) and monitoring system. This safety management of infrastructure applied to bridge, cut slop and tunnel, embankment and playground etc. It was constructed safety management system of various infrastructure to improve efficient management and operation for many infrastructure.