• Journal of Environmental Science International
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• v.16 no.1
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• pp.95-102
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• 2007

The paper aims to highlight residents' preference of park close to industrial area in Seo-gu, Daegu City. Questionnaire survey was the main research method for the study from June to August last year. There were 2 survey questionnaires, one is for satisfaction degree regarding residents' general park use and the other is especially for vest-pocket use. For the research, 150 questionnaires were surveyed for each park users(total 300 questionnaires) and 270 questionnaires are used for the statistical analysis. The analysis showed that small vest pocket sized park was the proper model for close to industrial area. The majority residents preferred small park close to a residential area, also 77% of residents who use vest-pocket park replied that they live within 10 minute walking distance from there. In the case of Seo-gu, there were several small vest pocket sized parks which can satisfy the residents' preference. Therefore the plan which utilize them positively is necessary.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 1995.04a
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• pp.511-511
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• 1995

• Proceedings of the SAREK Conference
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• 2004.11a
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• pp.73-73
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• 2004

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.1153-1154
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• 2011

본 논문은 3상 30kW 및 50kW 계통연계형 태양광 인버터의 개발에 관한 것으로, 그에 대한 제어기 및 성능에 대해 소개한다. 본 논문에 소개되는 3상 30/50kW LSPV 태양광 인버터는 태양전지에서 발생하는 가변성 직류에너지를 한전계통에 최적으로 주입시키는 계통연계형 전력변환장치이며 국내의 발전사업자용으로 개발되었다. 3상 380V의 한전계통에 절연형으로 연계되며 낮은 THD 와 높은 역률로 고효율을 달성하였다. DC입력측의 개방전압은 900V로 태양전지모듈 조합의 편의성 및 DC과전압등에 대한 안전성을 향상하였고, EMI 전도노이즈에 대한 Filter를 장착하여 노이즈성분을 크게 개선하였다.

• Journal of Korean Institute of Industrial Engineers
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• v.37 no.3
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• pp.234-247
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• 2011

Product-service system (PSS) is a novel type of business model integrating products and services in a single system. It provides a strategic alternative to product-oriented economic growth and price-based competition in the global market. This paper first reviews the current status of PSS, including its concept, characteristics, benefits, and cases. This paper then reviews the existing literature and identifies major research issues for three main phases of a PSS development lifecycle, namely, PSS design, PSS evaluation, and PSS operation. This research is expected to contribute to promoting awareness and improving understanding of PSS in our society and planning of future research in this field.

• Journal of Korean Society of Occupational and Environmental Hygiene
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• v.5 no.2
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• pp.172-183
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• 1995

The airborne concentrations of the welding fumes produced during $CO_2$ arcwelding process at shipbuilding, shiprepairing, container manufacturing and car accessary manufacturing industry were investigated. The effects how much reduced the welding fume were checked when the portable fan was used. The results were as follows; 1.The geometric mean of welding fume concentration in shipbuilding factory was $10.05mg/m^3$. This exposure concentration was higher than other 3 manufacturing industries at 95% confidence level. 2. The sampling filters for welding fume could be digested with acid within 1 hour by microwave oven. The recoveries for investigated metal elements were all over 95%. 3. The optimal wavelength could be selected for the simultaneous analysis of 8 metal elements by ICP(Inductively Coupled Plasma). 4. Noxious gases($O_1,NO_2$) produced during $CO_1$ gas arc welding process were detected that the concentration of ozone($O_1$) was less than 0.01 ppm and that of nitrogen dioxide($NO_2$) was 0.01-0.03 ppm. 5. The geometric mean of welding fume particle diameter was $1.26{\mu}m$ and geometric standard deviation was 1.51 for the counts when particle an analyzer(ELZONE) had been used. 6. When the portable fan had been used,the reduced percent of total welding fume for workers was about 47.8% when portable fan was applied to blow and 71.7% when to exhaust.

• Proceedings of the Korean Fiber Society Conference
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• 2007.11a
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• pp.487-488
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• 2007

• 대한예방의학회:학술대회논문집
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• 1995.10a
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• pp.367-368
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• 1995

• 한국지형공간정보학회:학술대회논문집
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• 2005.08a
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• pp.51-59
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• 2005

With industrial development, industrial products became more refined and upscale, resulting in increased necessity for manufacturers to come up with a method to check whether products have been produced to meet the needs of the customer. For thisreason, attention was drawn to industrial photogrammetry to obtain data rapidly without contacting the target object. In this study, the experiment has been conducted with the O-2A aircraft to determine the applicability of industrial photogrammetry.

• Proceedings of the Korean Fiber Society Conference
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• 1996.10a
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• pp.269-274
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• 1996