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이주영,문대성,김익균,Lee, J.Y.,Moon, D.S.,Kim, I.K. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.1
Currently, cybersecurity technologies are primarily focused on defenses that detect and prevent cyberattacks. However, it is more important to regularly validate an organization's security posture in order to strengthen its cybersecurity defenses, as the IT environment becomes complex and dynamic. Cyberattack simulation technologies not only enable the discovery of software vulnerabilities but also aid in conducting security assessments of the entire network. They can help defenders maintain a fundamental level of security assurance and gain control over their security posture. The technology is gradually shifting to intelligent and autonomous platforms. This paper examines the trends and prospects of cyberattack simulation technologies that are evolving according to these requirements.
X- 정자와 Y- 정자의 분리에 관한 연구 2 . Percoll 중층원심분리법에 의한 인간정자의 분리
엄기붕(K . B . Oum),이주영(J . Y . Lee),고대환(D . H . Ko),정길생(K . S . Chung) 한국축산학회 1988 한국축산학회지 Vol.30 No.5
These experiments were carried out to develop new techniques for in vitro separation of X-and Y-bearing spermatozoa. One ㎖ of washed human sperm suspension was loaded on the isotonic discontinuous Percoll density gradient, and then it was centrifuged at 250×G for 25 min. After centrifugation, spermatozoa were fractionated according to Percoll density gradient. Spermatozoa included in each fraction were subjected to the estimation of motility, morphological abnormality, F-body test, and recovery rate of spermatozoa was also investigated. The results obtained in these experiments were summarized as follows: 1. Following centrifugation of discontinuous Percoll density gradient, population of spermatozoa increased progressively from low density to high density. The highest concentration of spermatozoa was observed in 7th fraction which included 20% of spermatozoa. 2. High percentage of motile spermatozoa was observed at high Percoll concentration and the highest percentage was obtained at 6th fraction. 3. Following Percoll centrifugation, percentage of X-sperm increased from 53.2% (control) to 74.1% (7th fraction). 4. Following centrifugation, sperm abnormality was increased at low Percoll gradient and decreased at high Percoll gradient. The lowest abnormality (15.0%) and the highest abnormality (46.0%) were observed at 7th fraction and 1st fraction, respectively.
Comparison of Fast Neutron Rates for the NEOS Experiment
Y. J. Ko,C. H. Jang,Kim Siyeon,J. Y. Kim,H. S. Kim,K. M. Seo,B. Y. Han,G. M. Sun,E. J. Jeon,Jaison Lee,M. H. Lee,Y. M. Oh,K. S. Park,K. K. Joo,B. R. Kim,H. J. Kim,이주영,Y. D. Kim,H. K. Park,H. S. Park 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.69 No.11
The fast neutron rates are compared at the site of the NEOS (Neutrino Experiment Oscillation Short baseline) experiment, a short-baseline neutrino experiment located in a tendon gallery of a commercial nuclear power plant using a 0.78-liter liquid scintillator detector. A pulse shape discrimination technique is used to identify neutron signals. The measurements are performed during the nuclear reactor-on and -off periods, and the fast neutron rates are found to be consistent with each other. The fast neutron rate is also measured at an overground site with a negligible overburden and is found to be ∼ 100 times higher than that at the site of the NEOS experiment.
측면충돌시 최적의 PADDING 및 AIRBAG 설계를 위한 해석적 방법
이주영(J.Y.Lee),이인택(I.T.Lee),한성준(S.J.Han),박관흠(K.H.Park) 한국자동차공학회 1996 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1996 No.11_2
Generally, there are two analysis tools in crash simulation, which are F.E.M code and Multi-Body Dynamics code. The analysis using F.E.M code needs much computing hours. The analysis using Multi-Body Dynamics code needs the experimental data of components. This study presents the coupling method to compensate the limitations of those analysis methods. Using the coupling method, the optimization is done in the padding and the side airbag system. MADYMO and PAM-CRASH are used in this study.<br/>
이주영(J. Y. Lee),강무진(M. Kang) 한국정밀공학회 2004 한국정밀공학회 학술발표대회 논문집 Vol.2004 No.10월
Design of manufacturing system is a very complicated and tricky process. Since no efficient method has been known, yet it has been mainly done based on experience and heuristics. Even mostly used simulation approaches can only evaluate the performance of an already configured system, but cannot provide a help to configure or reconfigure a manufacturing system. An efficient way to (re-)configure manufacturing systems might be to use building blocks of a manufacturing system in the similar manner the recent products are configured based on modular principle. In this paper, the concept of a building block and its representation method are described. An example of assembly system configuration is also given.
박영선(Y. S. Park),이주영(J. Y. Lee),박경진(G. J. Park),위인혁(I.H.Wi),유재석(J.S.Ryou) 한국자동차공학회 1993 한국자동차공학회 춘 추계 학술대회 논문집 Vol.- No.-
In the crash environment, the safety analysis becomes very essential wi th the growth of automobile industry. Therefore. an airbag system is required to protect the occupant. The exact effects of an airbag can be evaluated from the barrier or sled test which is<br/> quite expensive. In this study. the airbag system in a domestic passenger car is analyzed with the computer simulation program CAL3D. The modeling of a passenger car including an airbag is established and the results are verified by comparisons with real crash 'tests. A graphic post-processor is developed for the dynamic behavior of an<br/> occupant. Some sensitive design parameters of an airbag are determined and design trends are recomended to minimize HIC(Head Injury Cri terion) wi th the orthogonal array of statistical methods.<br/>