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안전형 비납땜 틀고정 영구 접속형 멀티콘센트 개발에 관한 연구
조원석(Won-Seok Cho),이위로(Wi-Ro Lee) 한국조명·전기설비학회 2015 조명·전기설비학회논문지 Vol.29 No.12
Normally, multiple socket-outlet is manufactured with soldered, welded permanent connection (termination). Because this procedure is very non-environmental and requires many labor forces, many companies skip this process. To solve this these problems, this research had to design permanent joint type multiple socket-outlet, develop safer multiple socket-outlet than is sold in markets. Progressing this research, we took 3 steps. First, we had to design device for fixing a frame suitable for multiple socket-outlet. Second, this multiple socket-outlet must pass fundamental standards through international standard (IEC 60884-1) and Korean standard (K 60884-1) tests. Third, it had to pass both several mechanical and electrical tests which is more strict than fundamental standards and vibration and impact tests following KS standards for enhancing its safety. After finishing 3 steps, we could obtain objective and fair data, develop environmental permanent joint type multiple socket-outlet without soldering crimped connection.
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중국연변지역 조선족 농촌주택의 시기별 변천에 대한 조사연구 - 평면의 변화를 중심으로 -
허성걸,조원석,변경화,Heo, Seong-Geol,Cho, Won-Seok,Byun, Kyeonghwa 한국농촌건축학회 2015 농촌건축 : 한국농촌건축학회논문집 Vol.17 No.3
The purpose of this paper is to analysis on periodical changes of rural houses of Korean-Chinese people residing in Yanbian area, China focused on periodical changes of floor plans according to Chinese government's policies and regulations influencing on rural houses. Changes of floor plans are classified into four periods; immigrating settled period, 1960-1970s, 1980-1990s, and after 2000. Total number of 67 cases were analyzed that data was collected 48 cases of literature studies and 19 cases of field study in Yanbian, China. The results are as followings. In immigrating settled period, floor plans of the rural houses have tended to be continued the pattern of the Korean traditional rural houses. Nevertheless China was changed socialism system, rarely floor plans were influenced by the system during this period. From 1960s to 1970s, the livestock and rural mechanization are influenced by the "People's Commune" policy. The "Barn" and "Mill" were converted into "warehouse". The residential part consists of one Jeongji (space mixed dinning and kitchen) and one to three of Ondolbang (room). From 1980s to 1990s influenced by the policies of "Cultural Revolution", "Birth Control" and "Chinese Economic Reform", the Korean traditional customs like "elders first" and "distinction between the male and female have been gradually vanished. Meanwhile, spaces of the rural houses have consisted of Jeongji, big Utppang (room), and warehouse. Each space is opened and mutual. Since 2000, influenced by the policy of a "new Socialist Countryside Construction", the bathroom and kitchen are added in interior spaces, the life style in rural houses has been changed as for both the sedentary style and western style.
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중국연변지역 조선족과 한족 농촌주택의 변화에 관한 비교연구
허성걸,조원석,Heo, Seong-Geol,Cho, Won-Seok 한국농촌건축학회 2016 농촌건축 : 한국농촌건축학회논문집 Vol.18 No.2
This study is aimed to suggesting a hypothesis about the process of improvement of houses of the Korean-Chinese, comparing how Han Chinese and Korean-Chinese houses changed in Yanbian Area of China. This draws the conclusion by analyzing the field survey about residence of the Han Chinese and the Korean-Chinese in Yanbian Area of China. First of all, the characteristic of residence style change and the plan of rural houses of the Han Chinese are in the following. The plan of houses has been changed from allocating rooms from side to side with the kitchen as the center to linking each functional spaces through the aisle. And the main bedroom of houses becomes the central space for family members instead of Kang (partial Ondol) by expanding the floor heating system under the whole floor in houses. Next, the feature of residence style changes of the Han Chinese and the Korean-Chinese is as follows. In 1970s barns disappeared from houses of the Korean Chinese, but houses of the Han Chinese were not much changed. From 1980s to 1990s, spaces linking each rooms with aisles had appeared for comfortableness of residence and respecting each individual's privacy. On the other hand, The houses of the Korean-Chinese make a whole big space by getting rid of walls between the rooms. And after 2 thousand years later, Han Chinese houses have a bedroom with floor heating system. Both houses of the Korean-Chinese and the Han Chinese are changed to have a residence style which taking sedentary style and standing style.
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서정,이제훈,김정오,오상진,조원석,이두환,신철수,Seo, Jung,Lee, Je-Hoon,Kim, Jung-Oh,Oh, Sang-Jin,Cho, Won-Seok,Lee, Doo-Hwan,Shin, Chul-Soo 한국레이저가공학회 2001 Laser Solutions Vol.4 No.2
The laser strengthening of 35kgf/㎟ and 60kgf/㎟ grade steel sheets is investigated by using CO$_2$ laser beam irradiation. The increase of tensile strength is dominated by the number of fully penetrated melting line. Also. the optimal laser input energy(hardness) and the number of melting line (melting width) are important variables for laser strengthening. Local strengthening by laser beam may be effective for the weight reduction of components where the tailored welded blank can not be applied.
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