• Proceedings of the Korean Vacuum Society Conference
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• 2015.08a
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• pp.153-153
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• 2015

Application of the plasma is already highlighted as a new technology in the last few years. In these days, there are lots of attempt in various application with plasma in that it is known as an effective treatment to animal, plants, material and so on. Plasma in liquid, one of new plasma applications, has advantages in ability to treat bio-cell or solutions. For example, electro-surgery, water purification, radical generation and so on. Especially, plasma discharge in solutions is very useful technique and difficult to generate due to electrolysis, vaporization and something else. In this study, we have performed plasma discharge and checked sustainability of plasma in solution(saline 0.9%). And we have measured basic characteristics of plasma in liquid. Such as electrical energy and plasma density are calculated from discharging current and voltage. Also, its thermal energy is measured with IR camera.

• Journal of the Korea Institute of Building Construction
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• v.7 no.4
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• pp.93-99
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• 2007

Highly advanced technologies are being adopted into the domestic construction industry in accordance with rapidly changing global construction industry in the 21st century. Value Engineering methodologies have often been discussed but not yet settled in the country. This research, therefore, aims to provide a useful guide to utilizing design Value Engineering in Build Transfer Lease. 1. Questionnaires had been conducted, answered by those in the field. 2. Questionnaires were in regard to the obstacles in the application of design Value Engineering and activation schemes. 3. Five standards were provided to be chosen according to the degree of influence from each factor, whose answers were technically analyzed by a statistical program afterward. 4. Four obstacles classified in this method were approached systematically to analyze the problems. 5. Efficient Activation schemes have been suggested after various analyses in a variety of aspects.

• Proceedings of the Korean Institute of Building Construction Conference
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• 2012.11a
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• pp.93-94
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• 2012

In this study, prediction of later-age compressive strength of ultra-high strength concrete, based on the accelerated strength of concrete cured in 80℃ warm water was investigated. As a result, the nature of ultra-high strength concrete showed a rapid early strength enhancement, compressive strength using warm water method of 80℃ at 2days is same compressive at 28days using standard curing.

• Korean Journal of Veterinary Research
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• v.33 no.1
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• pp.119-123
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• 1993

The present study was intended to use the avidin-biotin-peroxidase-antiperoxidase complex (ABPAP) method for the identification of Mycobacterium bovis in the tissue sections of infected cattle. Antibodies and linksera for ABPAP procedure used in incubated order were rabbit anti-Mycobacterium polyvalent antibodies, goat anti-rabbit IgG, rabbit peroxidase-antiperoxidase complex, biotinyl-horse anti-rabbit IgG, and avidin-biotin-peroxidase complex. Where the bacterial antigen was localized by ABPAP, a dark brown deposit occurred in the cytoplasms of macrophages and Langerhans' giant cells of the granulomatous lesions. The method approved to be highly specific for the identification of the bacteria and allowed a precise localization of the bacterial antigen in infected cells.

• Journal of Internet of Things and Convergence
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• v.3 no.1
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• pp.9-11
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• 2017

Recently, with the widespread use of the Internet and mobile devices, the number of attacks by hackers using the network is increasing. When connecting a network, packets are exchanged and communicated, which includes various information. We analyze the information of these packets using hierarchical clustering analysis and classify normal and abnormal packets to detect attacks. With this analysis method, it will be possible to detect attacks by analyzing new packets.

• KSCE Journal of Civil and Environmental Engineering Research
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• v.10 no.4
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• pp.11-24
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• 1990

The effect of end restraints for adjoining members is the different variables influencing the column ultimate strength and the behavior. The propose of this study is to analyze eccentrically loaded reinforced concrete columns with the end restraind effect having rectangular cross-section and general boundary conditions. Accordingly, this investigation are to construct a typical analytical model of the reinforced concrete columns with general end boundary conditions. The mechanical components of the analytical model are to be rationally defined the actual behavior as possible, and the different variables influencing the behavior and the ultimate strength of the reinforced concrete columns are investigated by using a parametric study.

• Proceedings of the KIEE Conference
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• 2009.07a
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• pp.1391_1392
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• 2009

본 논문에서는 저압 서지보호기의 안전성평가를 위한 고압 계통 고장에 의한 순간 과전압시험 설비를 IEC 61643-1의 따라 구축 하였고, 구축된 시험설비의 성능을 분석하였다. 고압 계통의 순간 과전압시험 기준은 가장 일반적인 미국전력 계통의 기준인 3상 4선식이 반영이 되었으며 전압의 크기는 AC 1200V이다. 본 논문에서는 순간과전압이 상과 접지사이의 개방전압 AC 1200V을 약 200ms 동안 인가되는지를 측정하였고, 단락전류가 AC 300A이상을 측정하였다.

• IE interfaces
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• v.17 no.spc
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• pp.152-159
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• 2004

The Purpose of this paper is to propose performance evaluation schemes of flexible manufacturing cell using a generalized stochastic Petri net. In the competitive and global manufacturing environment, to evaluate the feasibility and manufacturability of a product in the product design stage is highly required. Through this process, all the possible problems which may occur in the manufacturing stage can be fixed in early stage. The scheme of generalized stochastic Petri net utilizing both immediate and exponential distributed transitions are applied to model a manufacturing cell with flexible machines, material handler, transporter and buffers. Performance analyses are performed based on behavioral, structural and quantitative properties. A flexible manufacturing cell is evaluated using a Petri net simulator.

• Transactions of the Korean Society of Mechanical Engineers B
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• v.23 no.11
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• pp.1444-1452
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• 1999

The turbulence structure of e. tip vortex generated by e. fixed wing was investigated with the use of two-dimensional laser Doppler velocimetry. The velocity field, composed of circumferential end axial components, was measured on the vertical section to the vortex trail, located at 2C downstream from the wing tip in the incoming flow condition of $Re=2.24{\times}10^5$. A quasi 3-dimensional measurement technique by use of 2-dimensional LDV system was suggested for Reynolds stresses and the higher moments. The validity of this technique was confirmed with the uncertainty analysis. The budget of the turbulence kinetic energy was analyzed by those results in the radial direction of the vortex core. It is resulted that the production is to be very likely balanced with the dissipation in most range of the vortex core.

• Proceedings of the Korean Vacuum Society Conference
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• 2009.08a
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• pp.97-97
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• 2009