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ITU-T X.805 기반 네트워크 서비스 대상 정보보호프레임워크 도출 방법론
조영덕 ( Young-duk Cho ),원유재 ( You-jae Won ) 한국정보처리학회 2005 한국정보처리학회 학술대회논문집 Vol.12 No.2
본 논문에서는 종단간 신규 네트워크 서비스에 대한 ITU-T X.805 기반 취약성 분석과 정보보호 요구사항 및 보안 대책 도출 절차를 제시한다. 일련의 절차는 정보보호프레임워크 도출 방법론 혹은 방법론으로 줄여서 표현한다. 종단간 네트워크 서비스는 IT 839의 8대 서비스를 대상으로 하며 방법론은 ITU-T X.805 표준과 정보보호 컨설팅 방법론을 참고하였다. 방법론은 새로운 인프라나 서비스의 정보 보호 대책을 설계하는데 필요한 도구로써의 역할을 하여 구축 단계부터 정보보호를 반영할 수 있는 분석틀을 제시할 것으로 기대한다.
가속도 최적화 및 형상 최적화를 통한 수직 컬럼 이동형 머시닝 센터의 진동 저감에 대한 연구
조영덕(Young-Duk Cho),정원지(Won-Jee Chung),이춘만(Choon-Man Lee),윤상환(Sang-Hwan Yoon) 한국생산제조학회 2008 한국생산제조학회지 Vol.17 No.1
By the reason of increased demand of high productivity and quality, the manufacturer have an effort in many directions of a machine tool industries. Among there, we proposed method of decreasing displacement in MC(machining center). In other words, Quality related with vibration of a tool cutting products. For decreasing it, improved by optimizing a shape of the column-part and acceleration curves of motors In this paper we could find design factors has much influence on decreasing the displacement using the DOE(Design of Experiments) and optimized the level of the factors using ADAMS<SUP>®</SUP> and MINITAB.<SUP>®</SUP> And we suggest optimized a acceleration curve using Matlab<SUP>®</SUP>.
조영덕(Young-Duk Cho),김효곤(Hyo-Gon Kim),강량이(Ryang-Lee Kang),유승화(Seung-Wha Yoo) 한국정보과학회 2000 한국정보과학회 학술발표논문집 Vol.27 No.2Ⅲ
본 논문은 국내 상용 인터넷 전화서비스에서의 망 경로상의 특성 즉, 패킷의 지연(Delay), 분실(Loss), 지터(Jitter)에 관한 특성을 실험적으로 접근하였다. 국내 3개의 인터넷 서비스에 대해 지역별로 패킷 지연시간과 손실률, 지터를 측정하였고, 패킷 지연시간이 가장 긴 게이트웨이에 대해 중간 경유 노드들에도 같은 실험을 하여 결과를 얻었다. 이런 결과를 바탕으로 국내 환경에 적합한 인터넷 전화망 품질 제고(提高)를 위한 방법들을 제안한다. 본 논문 이후에, 제안된 방법들에 관한 연구를 심도 있게 진행할 것이다.
전문가 인터뷰를 통한 건설 프로젝트 설계 및 시공단계의 BIM 적용현황 및 개선전략 분석
조영덕(Young-duk Cho),이주성(Joo-sung Lee),김재준(Jae-jun Kim) (사)한국CDE학회 2021 한국CDE학회 논문집 Vol.26 No.4
BIM has been applied in various ways based on success in the United States, Europe and Japan. Based on this, the government mandates BIM for large domestic public orders such as Public Procurement Service and LH. However, the effectiveness of BIM application is being degraded due to the lack of detailed and quantitative BIM application strategies such as BIM Standard, Project Execution Plan, contract system, and evaluation standards for BIM companies and experts. This study conducted expert interviews to derive construction companies" BIM application status, problems, and improvement strategies. Questionnaires were selected to comprehensively understand both company-level strategies and project-level strategies, and based on this, in-depth interviews were conducted with four BIM experts from major domestic companies. Research results and improvement strategies analyzed through interview can be used as basic data for future BIM Standard and application strategies.
6시그마의 방법론의 DMADOV 기법에 의한 스핀들에 발생하는 문제 해결 방안에 대한 연구
조영덕(Young-Duk Cho),정원지(Won-Jee Chung),이춘만(Choon-Man Lee) 한국생산제조학회 2007 한국생산제조학회지 Vol.16 No.6
Recently the machine industry is rapidly advanced for improving productivity. Especially an effort decreased error factors of machine tool continuously is being studied. In this paper, we propose a method that decreased vibration in the high speed spindle. By appling 6-sigma technique(DMADOV), we can grasp the influence between the housing design and a rotation accuracy. For a correct conclusion, we measure an actual spindle and analysis by ARMD® (rotation analysis program). inally we find out influenceable design factors and the improvement condition about 20.7%.
김덕환 ( Duk Hwan Kim ),조영덕 ( Young Duck Cho ),김정윤 ( Jung Youn Kim ),윤영훈 ( Young Hoon Yoon ),이성우 ( Sung Woo Lee ),문성우 ( Sung Woo Moon ),최성혁 ( Sung Hyuk Choi ) 대한외상학회 2012 大韓外傷學會誌 Vol.25 No.4
Purpose: Trauma is one of the major causes of maternal and fetal mortality, and the most common cause of maternal trauma is a traffic accident. In Korea, data about traffic accidents in pregnant women are not widely collected and classified so far. Hence, we studied and analyzed the characteristics of injured pregnant women by the traffic accidents. Methods: From January 2002 to August 2011, pregnant women who were in traffic accidents visiting Emergency Department were studied. Pregnancy out come and the degree of the damage were determined through the retrospective analysis of the medical records. Results: The pregnant women who visited after traffic accidents were total 204 patients. Among them, 176 patients had no complication related to the traffic accidents, 28 patients had complications. The incidence of the complications in the 3rd trimester pregnants was statistically significant higher than that in the other trimesters. The analysis based on the mechanism shows more complications in the pedestrian injury. In the survey by the type of the vehicles, the complications from the trauma associated with a car had lower incidence. The patients arrived at the emergency center by walking had greater numbers than who arrived by an ambulance in the groups occurred the complications. The patients suffered complications who complained pain in trunk especially in abdomen and pelvis than in extremities and complained vaginal discharge, and those showed a statistically significant greater incidence. Conclusion: When pregnant women were injured by the traffic accidents, the factors related to the poor pregnant prognosis were trimester of pregnancy, means of visiting the emergency center, trauma mechanism, and complaining symptoms. Therefore, these factors may be used as a prognostic tool to predict an incidence of complications, length of hospital stay and rate of complications and can be used to plan for treatments. (J Trauma Inj 2012;25:132-138)
VoIP 스팸 콜 탐지를 위한 음성신호의 DEVS 모델링 및 시뮬레이션
김지연,김형종,조영덕,김환국,원유재,김명주,Kim, Ji-Yeon,Kim, Hyung-Jong,Cho, Young-Duk,Kim, Hwan-Kuk,Won, Yoo-Jae,Kim, Myuhng-Joo 한국시뮬레이션학회 2007 한국시뮬레이션학회 논문지 Vol.16 No.3
VoIP 서비스 품질이 개선되고 많은 문제점들이 극복되면서 이에 대한 사용자들의 관심이 높아지고 있다. VoIP는 인스턴트 메시징 서비스 등 사용자들의 편익을 위한 서비스를 제공하고 있지만 비용 및 보안 문제는 사용자들의 이러한 서비스 사용을 주저하게 만들고 있다. 본 논문은 이와 같은 문제 중 하나인 VoIP 스팸 문제를 다루고자 한다. 스팸 콜에서의 음성 메시지 신호 패턴을 고려하여 정상 콜과 Noise가 포함된 정상 콜, 스팸 콜 이 세 가지 음성 모델을 설계하고, 논문에서 제시하는 음성 신호 정보량 기반의 스팸 탐지 알고리즘에 적용해 보았다. 각 모델의 모델링 및 시뮬레이션은 DEVS-$Java^{TM}$를 이용하였다. 본 연구는 스팸 콜 음성 신호를 탐지하기 위한 방법을 제시하고 이를 모델링 및 시뮬레이션 방법론을 통해 검증하는 것에 기여점을 둘 수 있다. As the VoIP service quality is getting better and many shortcomings are being overcome, users are getting interested in this service. Also, there are several additional features that provide a convenience to users such as presence service, instant messaging service and so on. But, as there are always two sides of rein, some security issues have users hesitate to make use of it. This paper deals with one of the issues, the VoIP spam problem. We took into account the signal pattern of voice message in spam call and we have constructed voice signal models of normal call, normal call with noise and spam call. Each voice signal case is inserted into our spam decision algorithm which detects the spam calls based on the amount of information in the call signal. We made use of the DEVS-$Java^{TM}$ for our modeling and simulation. The contribution of this work is in suggestion of a way to detect voice spam call signal and testing of the method using modeling and simulation methodology.
6시그마의 방법론의 DMADOV 기법에 의한 스핀들에 발생하는 문제 해결 방안에 대한 연구
정원지(Won-Jee Chung),조영덕(Young-Duk Cho),이춘만(Choon-Man Lee) 한국생산제조학회 2007 한국생산제조시스템학회 학술발표대회 논문집 Vol.2007 No.5
Recently the machine industry is rapidly advanced for improving productivity. Especially an effort decreased error factors of machine a tool continuously is being studied. In this paper, we propose a method that decreased vibration in the high speed spindle. By appling 6-sigma technique(DMADOV), we can grasped the influence between the housing design and a rotation accuracy. for a correct conclusion, we measure a actual spindle and analysis by ARMD<SUP>®</SUP>(rotation analysis program).
수직 컬럼 이동형 머시닝 센터의 진동 저감을 위한 컬럼 부위 최적화에 대한 연구
정원지(Won-Jee Chung),조영덕(Young-Duk Cho),이춘만(Choon-Man Lee),윤상환(Sang-Hwan Yoon) 한국생산제조학회 2006 한국생산제조시스템학회 학술발표대회 논문집 Vol.2006 No.5
By the reason of increased demand of high productivity and quality, the manufacturer have an effort in many directions of a machine tool industries. Among there, we proposed method of decreasing displacement in MC(machining center). In other words, Quality is improved by optimizing a shape of the column-part. In this paper we could find design factors has much influence on decreasing the displacement using the DOE(Design of Experiments) and optimized the level of the factors using ADAMS and MINITAB.
간장 ( 肝臟 ) · 담도 ( 膽道 ) 및 췌장 ( 膵臟 ) : 만성 췌장염에서의 췌관확장술
조성원(Sung Won Cho),심찬섭(Chan Sup Shim),김진홍(Jin Hong Kim),이문성(Moon Sung Lee),김홍수(Hong Su Kim),조영덕(Young Duk Cho) 대한소화기학회 1991 대한소화기학회지 Vol.23 No.4
N/A We report a case of chronic recurrent pancreatitis accompanied by multiple stenosis of the main pancreatic duct which successfully treated by endoscopic dilatation of pancreatic duct. Chronic pancreatitis with stenosis of pancreatic duct was diagnosed clinically and by endoscopic retrograde cholangiopancreatography. In order to relieve recurrent abdominal pain, we performed endoscopic pancreatic bougination with Soehenda biliary uilatation catheters and balloon dilatation with Rigiflex biliary balloon catheters. No significant complications occurred following pancreatic duct dilatation except mild pancreatitis associated with pancreatic manipulation. We conclude that endoscopic pancreatic duct dilatation as a method to treat chronic pancreatitis is encouraging, but large series and longer term follow-up are necessary before its efficacy can be determined.