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COOLING PERFORMANCE OF 25 KW IN-WHEEL MOTOR FOR ELECTRIC VEHICLES
김성철,W. KIM,김민수 한국자동차공학회 2013 International journal of automotive technology Vol.14 No.4
The in-wheel motor used in electric vehicles was designed and constructed for an electric direct-drive traction system. It is difficult to connect cooling water piping to the in-wheel motor because the in-wheel motor is located within the wheel structure. In the air cooling structure for the in-wheel motor, an outer surface on the housing is provided with cooling grooves to increase the heat transfer area. In this study, we carried out the analysis on the fluid flow and thermal characteristics of the in-wheel motor for various motor speeds and heat generations. In order to resolve heat release, the analysis has been performed using conjugate heat transfer (conduction and convection). As a result, flow fields and temperature distribution inside the in-wheel motor were obtained for base speed condition (1250 rpm) and maximum speed condition (5000 rpm). The thermo-flow analysis of the in-wheel motor for vehicles was performed in consideration of ram air effect. Also, in order to improve cooling effect of the motor, we variously changed geometries of housing. Therefore, we confirmed the feasibility of the air cooling for the motors of 25 kW capacity with housing geometry having cooling grooves and investigated the cooling performance enhancement. We found that the cooling effect was most excellent, in case that cooling groove direction was same with air flow direction and arranged densely.
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송영의 근대단편소설 <아버지>를 통해 살펴본 활자본 소설의 향유 양상
김성철 고전문학한문학연구학회 2011 고전과 해석 Vol.10 No.-
본고에서는 송영의 근대단편소설 <아버지>를 소개하면서, 주인공 서주사의 삶의 태도를 통해 드러나는 고소설과 신소설의 관계에 대해 살펴보았다. 활자본 소설의 연구를 살펴보면, <아버지>의 서주사와 같이 활자본 소설의 개작 및 재생산에 적극적으로 가담한 ‘저자’에 대한 언급은 명확하게 이루어지지 않았다. <아버지>에서는 활자본 소설들을 재창작하고 개작하여 생계를 이어가는 인물들을 ‘책점소설가’라고 지칭한다. 이들은 신소설을 개작하기도 하고, 당대에 여전히 두터운 독자층을 이끌고 있던 고소설을 개작하기도 하면서 생계를 이어간다. 활자본 소설들을 살펴보면 대다수의 작품들은 이러한 ‘책점소설가’에 의해 재창작되거나 개작된 것임을 알 수 있다. 활자본 소설의 대중성 확장에 일조한 인물들은 바로 판권지에 이름을 올리지 못한 ‘책점소설가’라고 할 수 있다. 활자본 소설들에 대한 소설사적 평가가 좋지 않은 이유는 활자본 소설들에 필연적으로 내재되어 있는 상업적 측면이 부각되기 때문이다. 같은 유형의 소설들을 반복해서 재생산하는 행위는 활자본 고소설의 특징이기도 하다. 이러한 경향은 철저히 독자들의 성향에 맞춘 상업적 의식의 일면을 보여준다고 할 수 있다. 반복적으로 재생산되는 유형의 활자본 고소설들의 특징을 분석한다면 활자본 소설들의 유형성을 구체화할 수 있을 것으로 보인다. 송영의 근대단편소설 <아버지>에서는 아버지와 아들이 향유하는 소설을 통해 삶의 방식을 드러낸다. 아버지는 고소설 향유 집단의 인식을 그대로 드러내고 있으며, 아들은 신소설적인 삶의 태도를 보인다. 이 중, 문체적 차이가 <금낭이산>에서 드러나고 있기 때문에, <아버지>와 연관해서 살펴보았다. 이러한 분석을 바탕으로, 활자본 고소설의 재생산 집단의 유형을 살필 수 있을 것으로 생각되며, 신소설과 고소설의 관계에서 고소설의 위치에 대한 확인을 가늠하고 있다는 면에서 의미가 있을 것으로 보인다. This thesis examined the relation between a classic novel and a new style novel printed in early 20th through the attitude of Mr. Seo to his life meanwhile it introduced the short story <Father>. Looking at the research of the printed book of fiction, there was a writer was not clearly mentioned such as Mr. Seo who involved in rewriting and adapting. Those were just called ‘a bookshop writer’ in <Father>, who made their living by rewriting and adapting the printed fiction. They adapted the new style novels that began to emerge in Korean literary history and rewrote the classic novels that still had a huge reading public for their livelihood. In looking at the research of the printed fiction most works of the printed fiction were adapted and rewrote by ‘a bookshop writer’. Therefore people who contributed the extension of popularity were these writers, who could not revealed their name on colophon. The reason of the negative evaluation is that the commercial aspect was necessarily inherent and emerging the printed fiction. The printed classic novel had the characteristic having been reproduced repeatedly in similar type. It tends to reflect one of the commercial aspects getting adjusted toward the taste of readers. By analyzing it, the characteristics according to types can be materialized The attitudes to life was revealed by the different enjoyment of the novel between father and son in the short story <Father> by Song Young. The father showed the way of thinking of the readers of a classic novel while the son followed the attitude to life of the new novel. Among them, <Keum rang yi sahn> will be analyzed relating <Father>, because it shows the differences of literary style. By the basis of this analysis, the type of the group having reproduced the printed fiction can be examined and it canbe meaningful to identify the position of the classic novel in a relation between a new novel and a classic novel.
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김성철,성인수 대한건축학회 2000 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.20 No.2
The purpose of this study is to identify the influence factors of small-sized architectural firm business performance in Seoul. For this purpose the previous studies were reviewed and empirically examined the relationship between the influence factors and small sized architectural firm business performance. The factors are selected as the following: chief architect's management ability, engineering & design ability, customer management and staff management. As analysis methodology, simple regression analyses and reliability tests are employed. The main result of this study is that the influence factors during '98∼'00 are architectural competition prizes and reputation.
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