• Journal of the Korean Institute of Educational Facilities
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• v.26 no.6
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• pp.29-37
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• 2019

The research institute has a function to get the research outcome through the various experiments, data collection and analysis. Therefore, research building is important to keep the research condition or experiment environment. But buildings would be deteriorated and leaded into the deterrence of research. Maintenance is planned to protect the research building condition through various general repair or heavy repair. The heavy repair is generally conducted in massive repair scope or main components preparation. In this paper, it aimed at analyzing the effect of the massive or main components repair with inputted cost and its resulted output. In order to analyze the effect of a massive repair, it used the Benefit/Cost analysis and sensitivity analysis. Results of this study are as follows : The benefit/cost analysis shows that research building whose researcher continuously live and study has good effect. On the contrary, pace of the the experimental function is not good effect in benefit/cost analysis. But the experimental function is indispensible to get the research outcom for the research goal. Therefore, the experimental function will be planned to repair and get the historical repair data because the proper repair time would be prepared to cut down the repair cost.

• Journal of Fashion Business
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• v.26 no.5
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• pp.62-75
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• 2022

The purpose of this study was to analyze the types of aesthetic characteristics and their expression methods in the goth style expressed with the sensibility of an illustrator, using the work of Toon Hertz as an example. As a research method for this purpose, previous studies and books were used to examine the components of fashion illustration, the concept and aesthetic characteristics of goth style, and the world of Toon Hertz's work. In the qualitative studies, Toon Hertz's works were collected and the characteristics of each component were analyzed. As a result of analyzing the aesthetic characteristics, Distortion appeared as the main element of the human body, and the human body was distorted through the method of combining the human body with animals, plants, and other objects. History was mainly expressed through fashion elements. Victorian clothing was predominant, the color was mainly black, and it was characterized by decorations, such as fancy laces, corsets, and shirrings. The screen layout and the object components appeared as the main components of mystery. Sensuality was a major component of the human body, and it emphasized decadent and sensual images of a woman sitting with both legs apart or placing her hands on her legs or chest. Fear was the main component of the human body, and strangeness and fear were created by omitting or removing parts of the body, such as women's arms, legs, hands, or eyes.

• Journal of Environmental Science International
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• v.18 no.1
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• pp.61-72
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• 2009

Fabrication and oxidants production of 3 or 4 components metal oxide electrode, which is known to be so effective to destruct non-biodegradable organics in wastewater, were studied. Five electrode materials (Ru as main component and Pt, Sn, Sb and Gd as minor components) were used for the 3 or 4 components electrode. The metal oxide electrode was prepared by coating the electrode material on the surface of the titanium mesh and then thermal oxidation at $500^{\circ}C$ for 1h. The removed RhB per 2 min and unit W of 3 components electrode was in the order: Ru:Sn:Sb=9:1:1 > Ru:Pt:Gd=5:5:1 > Ru:Sn=9:1 > Ru:Sn:Gd=9:1:1 > Ru:Sb:Gd=9:1:1. Although RhB decolorization of Ru:Sn:Sb:Gd electrode was the highest among the 4 components electrode, the RhB decolorization and oxidants formation of the Ru:Sn:Sb=9:1:1 electrode was higher than that of the 3 and 4 components electrode. Electrogenerated oxidants (free Cl and $ClO_2$) of chlorine type in 3 and 4 components electrode were higher than other oxidants such as $H_2O_2\;and\;O_3$. It was assumed that electrode with high RhB decolorization showed high oxidant generation and COD removal efficiency. OH radical which is electrogenerated by the direct electrolysis was not generated the entire 3 and 4 components electrode, therefore main mechanism of RhB degradation by metal oxide electrode based Ru was considered indirect electrolysis using electrogenerated oxidants.

• Journal of Advanced Marine Engineering and Technology
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• v.22 no.6
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• pp.901-907
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• 1998

This paper presents a real-time control technique for the development of a ship main engine remote control system, In general several tasks are executed by the event-driven method in real-time system. However when some tasks have time delay components it is difficult to achieve good real-time performance. To cope with this problem a number of timers in most conventional system have been used. In this paper we introduce a real-time control methodology of dealing effectively with tasks including time delay components using one hardware timer. And also a speed control method of main engine which includes critical revolution range a crash astern and a emergency ahead function a switching method of remote control position and a flickering method for the indication of multi-stage alarm are discussed. As long as functions and method are imple-mented as forms of tasks the development of main engine remote control systems can be easy for different types of engines.

• The Transactions of The Korean Institute of Electrical Engineers
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• v.64 no.1
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• pp.57-63
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• 2015

Fault currents characteristics contain decaying DC offset. First cycle peak value of fault currents is higher than steady-state fault current value. These characteristics can affect the operation of protective device. To reduce the asymmetric fault current, the method using a series connection of two hybrid-type Superconducting Fault Current Limiter(SFCL) components, an auxiliary SFCL and a main SFCL, has been proposed. The auxiliary SFCL limits the first half cycle fault current, while main SFCL limits the steady state fault currents. This paper proposed a decision method of the optimal insertion resistance of auxiliary and main SFCL components. To verify the effectiveness of proposed scheme, the various simulations are performed by using Electromagnetic Transient Program(EMTP).

• KIEE International Transaction on Electrical Machinery and Energy Conversion Systems
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• v.2B no.4
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• pp.183-190
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• 2002

This paper presents an improved Zero Voltage/Zero Current Switching (ZVZCS) commutation cell with minimum additional components, which provides soft switching at both turn-on and turn-off of main and auxiliary switches as well as diodes in a PWM DC/DC converter. The proposed soft-switching technique is suitable for not only minority, but also majority carrier semiconductor devices. The auxiliary switch of the proposed ZVZCS commutation cell is in parallel with the main switch, and therefore, the main switch and the diode are free of currentstress. The operation principles of the proposed ZVZCS commutation cell are theoretically analyzed using the PWM boost converter topology as an example. The validity of the PWM boost converter topology with the proposed ZVZCS commutation cell is verified through theoretical analysis, simulation and experimental results.

• Korean Journal of Pharmacognosy
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• v.36 no.3 s.142
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• pp.252-256
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• 2005

The in visto inhibitory activities of essential oils of the Rosmarinus officinalis as well as its main constituents were evaluated against antibiotic-susceptible and -resistant strains of Staphylococcus aureus, streptococcus pneumoniae, Salmonella enteritidis and S. typhimurium. The essential oil fraction of R. officinalis and its main components, 1,8-cineole and camphor, exhibited significant inhibitory activities against most of the tested strains in this study, with MICs(minimum inhibitory concentrations) racing from 0.5mg/ml to 16mg/ml. The total oil fraction showed higher activity than its main components, 1,8-cineole and camphor against S. aureus strains. No remarkable differences were evident between MICs of the susceptible and resistant strains of S. aureus. Among the tested strains, S. pneumoniae CCARM 3523, the resistant strain to norfloxacin, oxacillin and erythromycin exhibited significantly lower sensitivity to the tested oils than antibiotic-susceptible strain. The oils revealed mostly higher inhibitory activity against S. typhimurium than against S. enteritidis.

• YAKHAK HOEJI
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• v.17 no.4
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• pp.245-248
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• 1973

Four main components of plants produced in Korea were subjected to the screening test of antineoplastic activity against Ehrlich ascites carcinoma, SN 36 leukemia and sarcoma 180. Of the four components, bilobol showed comparatively active survival effect.

• Journal of Korean Society for Atmospheric Environment
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• v.19 no.1
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• pp.45-56
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• 2003

In this study the distribution patterns of the metallic components were analyzed both before and after the Asian Dust (AD) events at 2001 by comparing the chemical composition of metallic components in terms of various statistical methods. According to the AD/NAD concentration ratio of metallic components, the main components of crustal soils were exhibiting the values above 1.0; but opposite results were seen dominantly for hazardous metallic components. Examination of fine-to-coarse (F/C) ratios of metallic components showed higher values for major anthropogenic components including Pb (5.83). Ni (2.61), etc. Comparison of our measurement data with those obtained within and across the Korean peninsula indicated that the metallic distribution patterns of the study area can be distinguished from previous studies. The results of our analysis, when investigated in relation with air mass movement patterns. indicated evidence of the direct influence of AD events and anthropogenic processes.

• Applied Biological Chemistry
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• v.41 no.1
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• pp.84-88
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• 1998

Composition of volatile flavor components of chestnut flower sand honey were investigated by GC and GC-MS. A total of 64 components including 14 aromatic compounds, 13 hydrocarbons, 7 fatty acids, 4 terpenes, 12 oxygenated hydrocarbons, and 7 misellaneous compounds and a total 41 components including 7 aromatic compounds, 16 hydrocarbons, 12 fatty acids, 1 terpene, 2 oxygenated hydrocarbons, and 3 misellaneous compounds were identified from total volatile concentrates of chestnut flower and honey respectively. The main components of flower volatile were 2-phenyl ethyl alcohol, 1-phenyl ethyl alcohol and benzyl alcohol which comprise 49.02% of this volatiles The main components of flower volatile were 2-phenyl ethyl alcohol, 1-phenyl ethyl alcohol and benzyl alcohol which comprise 49.02% of this volatiles. Aromatic compounds such as 2-phenyl ethyl alcohol, benzyl alcohol, 1-phenyl ethyl alcohol, 1-(2-aminophenyl) ethanone act as major contributor to the characteristic honey-like flavor of chestnut honey.