Background: Muscle activities of gluteus maximus (GM) and hamstring (HAM) have important roles in the stability and mobility of the hip joint during various functional activities including bridge and prone hip extension exercises. Objects: The purpose of this study is to investigate muscle activities of GM, multifidus (MF) and HAM during three different bridge exercises in healthy individuals. Methods: Twenty healthy subjects were participated. Electromyography device was used to measure muscle activities of GM, MF and HAM. Each subject was asked to perform three different bridge exercises with hip abduction (0°, 15°, 30°) in random order. One-way repeated measures analysis of the variance and a Bonferroni post hoc test were used. Statistical significance was set at α = 0.01. Results: The muscle activity of GM was significantly different among three conditions (hip abduction 0°, 15°, 30°) (adjusted p-value [Padj] < 0.01). The muscle activity of GM was significantly greater during bridge exercise with hip abduction 30° compared to 0° and 15° (Padj < 0.01). There was no significant difference in the muscle activity of MF and HAM muscle (Padj > 0.01). The ratio of muscle activity (ratio = GM/HAM) during bridge exercise with hip abduction 30° was significant greater compared to the hip abduction angles 0° and 15° (Padj < 0.01). Conclusion: Bridge exercise with hip abduction 30° can be recommended to selectively facilitate the muscle activity of GM and improve the ratio of muscle activity between GM and HAM.

CONWIP is robust and efficient for various type of operating system, such as series, parallel, and assembly systems. Especially, assembly system would be controlled couple of modified CONWIP system. In the following paper, we developed Critical Path CONWIP system that gives signal to sub-line from a station of critical path then, compared with m-conwip, discrete-card-buffer CONWIP. 2 representative asymmetric assembly system models are used to compare each control system. As a result, critical path CONWIP holds less whole work-in-process with similar output. It can decrease total cost and WIP for high holding cost assembly system

FTA를 비롯하여 급속하게 진행된 산업 및 경영환경의 세계화는 국내 중소기업들의 글로벌 기술사업화를 위한 좋은 기회이지만 국내 중소기업의 기술 사업화 노력들이 성과로 이어지고 있는지 불투명하다. 본 연구에서는 중소기업의 글로벌 기술 사업화를 위해 글로벌 기술 사업화에 대한 개념 정리하고 해외 권역별(중국, 일본, 동남아, 유럽)로 현재 진출 하거나 진출을 희망하는 기업들을 대상으로 설문조사와 요인분석을 통해 중요요인을 실증적으로 도출하고 해당 기업들을 클러스터링 기법을 이용하여 구분하였다. 이를 기반으로 하여 경영자의 글로벌 마인드 고취 관련 전략, 기업역량·희망진출 권역별 맞춤형 지원전략 및 중소기업의 글로벌 생태계 역량강화전략을 제안한다.