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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.
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.
A type of weakly symmetric structure on a Riemannian manifold
김재만 강원경기수학회 2022 한국수학논문집 Vol.30 No.1
A new type of Riemannian manifold called semirecurrent manifold has been defined and some of its geometric properties are studied. Among others we show that the scalar curvature of semirecurrent manifold is constant and hence semirecurrent manifold is also concircularly recurrent. In addition, we show that the associated 1-form (resp. the associated vector field) of semirecurrent manifold is closed (resp. an eigenvector of its Ricci tensor). Furthermore, we prove that if a Riemannian product manifold is semirecurrent, then either one decomposition manifold is locally symmetric or the other decomposition manifold is a space of constant curvature.