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KC인증이 기업경영에 미치는 효과 : 공산품을 중심으로
김재만,김광수 대한안전경영과학회 2015 대한안전경영과학회지 Vol.17 No.3
This study was to identify the effect of the satisfaction of certification, the educational use of the company offering certificate, the system of confirmation of the same model and the demographic aspect on the companies to see if compulsory certification(KC certificate) has negative effects on company management. First, the satisfaction of certification could reflect positive influences on company management. Second, there is no statistical significance in the education from the company offering certificate as a result of analyzing relationships but education is required and has an effect on improving quality according to the result of frequency analysis. Last, the system to declare by identifying the same model has a difference in significance in sales account, the development of products and warranty service for products.
시변 시간지연을 갖는 네트워크 제어 시스템의 H∞ 제어
김재만,박진배 제어·로봇·시스템학회 2013 제어·로봇·시스템학회 논문지 Vol.19 No.3
This paper presents a stabilization method for NCS (Networked Control Systems) with two additive time-varying delays. Each time delay component between the plant and the controller has different characteristics depending on communication network, and has the upper and lower bounds. The time delay occurring from the controller to the plant has an effect on the time delay occurring from the plant to the controller, and the relationship between two delays is taken into account on the stability analysis. Based on the two additive delay components and the bound conditions, the appropriate Lyapunov-Krasovskii functional and the LMI (Linear Matrix Inequality) method derive the stability condition and the norm constraint for time-varying delayed NCS. Simulation results are finally given to demonstrate the effectiveness of the proposed method.
ON A PRODUCT-SYMMETRIC RECURRENT-METRIC CONNECTION IN AN ALMOST HERMITIAN MANIFOLD
김재만 호남수학회 2013 호남수학학술지 Vol.35 No.2
In the present paper, we define a product-symmetric recurrent-metric connection in an almost Hermitian manifold and study some properties of this connection, in particular, its curvature properties.
김재만 영남수학회 2021 East Asian mathematical journal Vol.37 No.3
In this paper, we investigate the degreeof approximation of a function $f$ belonging to the generalizedZygmund class $Zyg^{\omega}(\alpha,\gamma)$ by Cesaro means of itsFourier series.