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박용운(Yong-Un Park),정학균(Hak-Gyun Jeong),조주희(Ju-Hee Cho),소지영(Ji-Yong So),정동화(Dong-hwa Jung),김대경(Dae-Kyong Kim) 한국조명·전기설비학회 2013 조명·전기설비학회논문지 Vol.27 No.8
This paper is development of single-phase brushless DC motor with outer rotor for ventilation fan. Cogging torque causes the noise?vibration to greatest impact on ventilation fan. Asymmetric notches are applied to tapered-teeth for cogging torque reduction of single-phase brushless DC motor. Initial model is notchless and proposed model is applied 2 asymmetric notches. The proposed method is proved motor characteristic through finite element analysis(FEA). Also, experimental results verify that the proposed model considerably reduces cogging torque and have the good sound quality in ventilation system.
박정현 ( Jeong Hyun Park ),강호성 ( Ho Seong Kang ),정학균 ( Hak Gyun Jung ) 조선대학교 공학기술연구원 2010 공학기술논문지 Vol.3 No.4
This study examined the establishment and management of urbanscape plan by four local governments of Jeollanam-do province. Since all local government used previous types of landscape design, but they cannot create their own identity. Therefore, local governments established basic landscape design with urban master plan. This plan showed uniformity of landscape design. The factors of landscape design were used such as land use, landscape axis, base and view spot. Basic landscape design was performed in whole administrative districts and analyzed their problems, general conditions, future aspect of landscape and future goal setting.
도시디자인 가이드라인으로서 지구단위계획의 적절성 평가 연구
김윤학 ( Yun Hag Kim ),문동일 ( Dong Il Moon ),박주원 ( Ju Won Park ),박현흥 ( Hyun Heung Park ),정학균 ( Hak Gyun Jeong ),박정현 ( Jung Hyun Park ) 조선대학교 공학기술연구원 2009 공학기술논문지 Vol.2 No.3
This research is investigated and analyzed about the district unit plan as urban design guidelines is how to affect formation of the urban landscape of amenity zone in Namak New Town. The major focus of this investigation and analysis is suitableness of urban design guidelines. And the suitableness is evaluated with result of this investigating and analyzing of how to affect formation of the urban landscape. and the results is follows. 1. On the survey of the evaluation of the district unit plan appropriateness, nearly half of the Architects, who have experience of district unit plan, say that ``It would be useful.`` on the other hand 70% of the Architects, who have experience of district unit plan, say that ``It could not be useful.`` This result appear that about 2/3 contribute to the urban space is appeared in the inexperienced design of the district unit plan. 2. The design of the elevation and the mass were undervalued in the evaluation of the utility value of the studied building. The causes of that problem are standardized shape and material. So the regulations, which contribute to the vitality of the street of stores are needed.