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Ecological Attributes by Forest Types in the Natural Forest of Mt. Odae
최영화,김지홍,정상훈 강원대학교 산림과학연구소 2017 Journal of Forest Science Vol.33 No.1
This study was conducted to evaluate the ecological attributes of forest types which were classified by cluster analysis in the natural forest of Mt. Odae on the basis of the vegetation data (232 sampling points) from the point-quarter sampling methods. For the classified types, the species composition was expressed by importance value to describe the stand structure and the species diversity was quantified using the Shannon’s diversity index. Recognized forest types were 1) Quercus mongolica-Pinus densiflora-Betula ermanii forest type, 2) Mixed mesophytic forest type, 3) Q. mongolica forest type, 4) B. ermanii forest type. Species diversity indices of total and overstory were highest in the Mixed mesophytic forest type (3.465 and 2.942), and lowest in the B. ermanii forest type (0.118 and 0.832). In addition to that, Q. mongolica-P. densiflora-B. ermanii forest type was calculated as 3.226 and 2.565, and Q. mongolica forest type was calculated as 2.776 and 1.218 in total and overstory, respectively. It was considered that after the P. densiflora and B. ermanii first invaded and site condition became good, Q. mongolica-P. densiflora-B. ermanii forest type was dominated by Q. mongolica. Mixed mesophytic forest type showed the most stable stand structure with various species distributed uniformly. Q. mongolica forest type would preserve the present stand status for a while, and the B. ermanii in B. ermanii forest type would be pressed by other species over time.
최영화,김한철 대구대학교 산업기술연구소 1993 産業技術硏究 Vol.12 No.-
The aim of this study was to analyse non-destructive trait of crushed stone concrete into rebound number composed of crushed sand and stone which expected to be a good substitue for river sand and gravel as one measure of natural aggregate shortage for concrete so that it led these conclusions. Rebound number showed that crushed sand concrete was higher 2~10% than river sand concrete, on the other hand, crushed stone concrete was lower than gravel concrete in low rebound number and higher than it in high rebound number. Inferring equations of compressive strength by rebound number and inference of standard-age compressive strength and modulus of elasticity by early-age rebound number on aggergate were same with <Fig.4>, <Fig.7,8> respectively, and correlationships were shown pretty well.
최영화,임헌욱 대구대학교 산업기술연구소 2014 産業技術硏究 Vol.25 No.1
Mordern structures tend to be high-rise buildings because of the population growth, restraint of lands and the high value of lands. In aspect to the control of lateral displacement, the importance of wind load and seismic load is also increasing to get the resistance against lateral load. The purpose of this study is to analyze the base building and 12-case models according to the bracing arrangement, the relative stiffness ratio of column and girder, the number of floor and the bracing section area by using MIDAS/GENw computer program. The results are as followings ; 1. Case 2 is effective in the vertical bracing arrangement. 2. Case 6 is effectual in the group bracing arrangement. 3. Case 8 and 10 are efficient in the diagonal and the horizontal bracing arrangements, respectively. 4. Case 8 among the diagonal bracing arrangements shows the smallest displacement value in all 12 cases, compared with the base building by decreasing as much as 48%.
「무형문화재법」의 쟁점과무형문화재 보전・진흥 방안 연구
최영화,민경선 국회입법조사처 2017 입법과 정책 Vol.9 No.2
The purpose of this study is to propose the preservation and promotion plan of intangible cultural property that responds to the new law by paying attention to the change of policy environment caused by the enactment of the 「Intangible Cultural Properties Act」. For that we reviewed related laws and documents. As the concept of ‘Intangible Cultural Property’ is expanded and the basic principle of protection is changed from ‘archetype’ to ‘prototype’ by the enactment of the new law, the importance of tradition through the use of intangible cultural properties is increasing. However, the problem of exclusive type classification of intangible cultural properties and the problem of setting ‘prototype’ for each type remains. In order to improve these problems, we propose that revision of the law and system improvement should be made. In addition, this study presented policies related to designation, research, management, education and utilization of intangible cultural properties for preserving and promoting intangible cultural properties. 본 연구의 목적은 「무형문화재법」의 제정으로 인한 정책 환경의 변화에 주목하고 신법에조응하는 무형문화재의 보전과 진흥 방안을 제안하는 것이다. 이를 위해 관련 법률과 문헌자료를 검토했다. 신법 제정으로 ‘무형문화재’의 개념이 확장되고 보호의 기본원칙이‘원형’에서 ‘전형’ 유지로 변화됨에 따라 무형문화재의 활용을 통한 전승의 중요성이 높아지고 있다. 그러나 무형문화재의 배타적 유형 분류 문제와 유형별 ‘전형’ 설정 문제가 남아있어 향후 법 개정과 제도 정비가 이루어질 필요가 있다. 이를 위해 초영역적 무형문화재의 분류기준과 유형별 전형의 척도를 마련하여 법과 제도를 개선할 것을 제안하고자한다. 또한 지속적인 무형문화재의 보전과 진흥을 위해 새 지정기준에 따른 무형문화재의 분류・지정・발굴 체계화, 확대된 무형문화재 범주를 포괄하는 지식플랫폼 구축과 기록화 연구, 합리적인 무형문화재 관리체계 도입, 맞춤형 무형문화재 교육과정 설계, 무형문화재 활용 활성화를 제안했다.
Cylindrical Shell에 있어서 曲線의 種類에 따른 膜應力解析 : Dead Load의 境遇 Membrane Stresses due to Dead Load
崔榮和 啓明大學校 生活科學硏究所 1978 科學論集 Vol.4 No.-
The present study is a numerical analysis of a simply supported cylindrical shell in which membrane stresses due to dead load are analyzed for various directrices. Given the semicentral angle to be between zero and 50 degrees as in these Models: 1. The values of membrane stresses NX, NY, NXY are respectively CINX<ELNX<CYNX, CYNY<ELNY<CINY, CINXY<ELNXY<CYNXY. 2. The combination of these three stresses gives Catenary Directrix<Parabolic Directrix<Circular Directrix<Elliptic Directrix<Cycloidal Directrix.