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경영혁신형중소기업의 혁신활동이 경쟁우위와 경영성과에 미치는 영향에 관한 연구
차영태 ( Young Tae Cha ) 한국경영공학회 2015 한국경영공학회지 Vol.20 No.3
The objective of this study is to clarify a causality among management innovation activities, competitive advantage and management performance of mainbiz enterprises. For this objective, innovative activities was classified into 4 categories including product innovation, process innovation, marketing innovation and organization innovation and competitive advantage was classified into 2 categories including differentiation advantage and cost advantage. Through a questionnaire of 372 enterprises, data was collected and it was analyzed by using a structural equation model. As a result of analysis, it was revealed that innovation activities (excluding process innovation) exerted a positive influence on differentiation advantage but cost advantage did not exert its influence on management performance statistically. As mediating effect of competitive advantage, differentiation advantage was analyzed to play a complete mediation role in innovation activities and management performance and cost advantage did not have mediating effect. The result of this study implies that enterprises are required to perform sustained innovation activities in order to secure differentiation advantage differentiated from competitors in order to increase management performance. In addition, it is implied that innovation activities does not exert direct influence on management performance but exerts an indirect influence on management performance through long-term implementation and differentiated advantage that is an intrinsic competitive edge of enterprises.
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차영태(Young-Tae Cha) 산업기술교육훈련학회 2009 산업기술연구논문지 (JITR) Vol.14 No.2
In reaction of stress tension control system is implemented by using a microprocessor. The experimental system is composed of an arm for hanging load, a strain gauge sensor, a bridge circuit for detecting wanted signal, an op amplifier, one chip microprocessor 80c196kc and a step motor for maintaining the original state. The purpose of the system s set up is to perform exact tension control and to maintain an original state of arm. The system detects the change of load, transforming the amount of change to an electrical signal. The signal is amplified and feed-back to sustain a constant tension. The system was confirmed to work as expected. It is expected that the implemented system can be used in force measurement, control automation, and in minute control tension.
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직접적 인증을 제공하는 안전하고 효율적인 키동의 프로토콜
이형규(Hyung Kyu Lee),이경호(Kyong Ho Lee),차영태(Young Tae Cha),심주걸(Joo Geol Sim),원동호(Dong Ho Won) 한국정보처리학회 1999 정보처리학회논문지 Vol.6 No.12
In this paper, we analyzed the security of key distribution protocol based on discrete logarithm for the purpose of designing key distribution protocol systematically. We also propose the efficient key agreement protocol with direct authentication. In comparison with Station-to-Station protocol, it provides the direct authentication using the Diffie-Hellman problem without signature.
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