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공사용자재 직접구매제도의 문제점 분석 및 개선방안에 관한 연구
신경훈(Shin, Kyoung-Hun),김성아(Kim, Seong-Ah),진상윤(Chin, Sang-Yoon) 대한건축학회 2015 大韓建築學會論文集 : 構造系 Vol.31 No.7
The government enacted the Act on Facilitation of Purchase of Small and Medium Enterprise-Manufactured Products and Support for Development of Their Markets, which obliged the direct buying of construction materials for public institutions. However, mandatory buyers proceeded without sufficient prearrangements with the public institutions. In field departments, these issues led to work problems caused by the rapidly increasing administrative workload, and many problems, such as defect treatment, were handled using the mandatory materials for small businesses. This study derived improvements for these processes and analyzed various problems in the field, employing a conventional survey following the enforcement of the Direct Buying System for construction materials. This study aimed to collect the issues of members of the government office through site visits, and these issues were classified into three levels (Level I: proceeding steps; Level II: major opinions; and Level III: detailed issues) according to three criteria: causes of occurrence, issue types, and work process. This study analyzed the importance of the opinions in the questionnaire survey. The major finding was that the manpower for handling purchasing was insufficient. This illustrates the problems caused by the strict enforcement of the Direct Buying System. This study suggests improvements based on the importance index.
영구자석 동기 전동기의 편심에 따른 전자기-기계 특성 해석
방태경(Tae-Kyoung Bang),신경훈(Kyung-Hun Shin),이정인(Jeong-In Lee),우종현(Jong-Hyeon Woo),조한욱(Han-Wook Cho),박판근(Pangun Park),최장영(Jang-Young Choi) 대한전기학회 2021 대한전기학회 학술대회 논문집 Vol.2021 No.7
This study presents the electromagnetic –mechanical coupled analysis of the permanent magnet synchronous machines (PMSMs) for air blower electrical machines, which are mainly used in industries such as air conditioning systems. The electromagnetic analysis results of the PMSM with a 10 pole 12 slot model is derived using the finite element method, and the noise, vibration and harsh analysis is performed applying the electromagnetic analysis results. The analysis results, and the effects of electromagnetic characteristics on the vibration of the PMSM were analyzed.