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외단열 고정 방법에 따른 접착강도 기준의 제정 방안에 관한 연구
박완구(Park, Wan-Goo),박진상(Park, Jin-Sang),송제영(Song, Je-Yeoung),오상근(Oh, Sang-Geun) 대한건축학회 2013 大韓建築學會論文集 : 構造系 Vol.29 No.1
Energy issues is accelerated. As a result, insulation method is being applied actively in the buildings. External insulation method is efficient batter than other insulation method and it is applied on the external wall of the building actively. Apply method of external Insulation is divided Wet Construction, Dry Construction, Semi-Dry Construction. Wet Construction is adhesion method on the buildings using mortar of adhesion. Dry Construction is adhesion method on the buildings using anchor except water. Finally, Semi-dry Construction is adhesion method on the buildings using anchor + mortar. But When the strong wind blows, method of external Insulation is occurring problem of drop out in the rainy season. Therefore, this research progress enactment plan of standard of bonding strength in bonding part of external insulation method of wet construction, dry construction, semi-dry construction. The results of this research, Adhesion of Semi-Dry Construction is best than other methods. Should try to use based on the adhesion strength standard on the basis of the results as described above.
생산환경 변화에 따른 최적 Material Flow Control 선택방법
박상근(Sang Geun Park),박성호(Sung Ho Park),하정훈(Chunghun Ha) 한국산업경영시스템학회 2013 한국산업경영시스템학회지 Vol.36 No.2
Material flow control (MFC) is a kind of operational policy to control of the movement of raw materials, components, and products through the manufacturing lines. It is very important because it varies throughput, line cycle time, and work-in-process (WIP) under the same manufacturing environments. MFC can be largely categorized into three types such as Push, Pull, and Hybrid. In this paper, we set various manufacturing environments to compare five existing MFC mechanisms: Push, Pull, and Hybrid (CONWIP, Gated MaxWIP, Critical WIP Loops, etc). Three manufacturing environments, manufacturing policies (make to stock and make to order), demand (low, medium, high), and line balancing (balanced, unbalanced, and highly unbalanced) are considered. The MFCs are compared in the point of the five functional efficiencies and the proposed compounded efficiency. The simulation results shows that the Push is superior in the functional efficiency and GMWIP is superior in the compounded efficiency.
박상근(Sang Geun Park),하정훈(Chunghun Ha) 한국산업경영시스템학회 2012 한국산업경영시스템학회지 Vol.35 No.1
Material flow control mechanism is a kind of operational policy in manufacturing. It is very important because it varies throughput, throughput time, and work-in-process (WIP) under the same manufacturing resources. Many Researchers have developed various material flow control mechanisms and insisted that their mechanism is superior to others. However the experimental environment used in the performance comparison are different and impractical. In this paper, we set various manufacturing environments to fairly compare five previous material flow control mechanism : Push, Pull, CONWIP, Gated MaxWIP, and Critical WIP Loops. The simulation results show that the Push is superior to others in both of throughput and WIP if required demand is less than 80% of capacity. In addition, the performance of CONWIP and its variants are not different statistically.