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시멘트 기와의 재료적 물성 향상 및 형상 개선에 관한 연구
최동욱(Choi, Donguk),홍경찬(Hong, Kyungchan),문크투브신 오키버드(Orchirbud, Munkhtuvshin),디다르 메이라모프(Meiramov, Didar),주현진(Ju, Hyunjin) 대한건축학회 2024 대한건축학회논문집 Vol.40 No.2
This study aims to enhance both the material properties and geometric design of cement roof tiles. While Korean traditional roof tiles have a long history, theyve often lacked academic input for material enhancement and geometric refinement. This research unfolds in two parts: an experimental phase focusing on boosting the strength and strain capacity of high-performance lightweight concrete (HPLWC) tiles using industrial byproducts like silica fume and recycled powder, and a finite element phase dedicated to optimizing tile geometry for improved resistance against external loads. The experimental phase involved density tests to optimize material packing and the use of air-entraining admixture to reduce self-weight. Results from the experimental phase yielded high-strength concrete (HSC) with recycled powder and high-performance lightweight concrete (MPEWC) using substantial air-entraining admixture and recycled powder. The analytical phase concentrated on reducing overall thickness and optimizing cross-sectional shape with green HPLWC.
한정문,홍경찬 全州大學校 大學院 1997 全州大 論叢 Vol.8 No.-
This survey introduces such highly influential factors based on the related literature review here in korean and aborad and examines their interrelation, and it is also examined developing stage of information system organization, if there is any difference in the importance of major factors that affects accounting information system performance in every growth phase, when the turning points, internal environment changes of company on the way from computer resource mangement tp data resource management is divided as marked ones, each low and high phases. The hypothesis based on the conceptual framwork can be largely divided in to two kinds ; the first hypothesis is on the relationships between the results of the accounting information system performance and major affecting factors and the second one is on relationships betwwen the development stage of information system dpt., and maf. The outcomes of empirical analysis of these hypothesis can be concluded like this : First, the correlation with the performance variables and four major affecting variables except the authority of information system dpt. has been proved to be significantly positive. Secondly, top management commitment is found to be related with two performance variables in every development stage. The relationships with user involvement indicate singnificant relevancy with performance variables in every development stage, but the relationship between use of system and user involvement has been more significantly presented in the low stage. From these result of analysis top management commitment is the most important factors in affecting the performance of accounting information system and interdependencu between the user dpt. and information system dpt., user involvement follows however., the authority of information system dpt. has no leverage.