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崔鍾碩 忠南大學校 1972 論文集 Vol.11 No.-
In this paper, the writer has estimated a model of the optimun curve by means of math ematical extrapolation based on logistic curue, using the census data since 1955 and mid-year population. The model of the optimum logistic curve of Korean is aasumed to be as follows : Y=53.147/1+1.4759e^-0.05049t Because this estimate is formed by mean of mathematical extrapolation, the expectation can be said to be optimistic, on the assumption that such a stable tendency as that of today will last. There will be a good deal of reliability on postcensal estimate of future population because this estimate is formed using the census data from around the demographic transition to the present day. We can guess at a saturation population by virtue of an estimate of logistic curve. The saturation population of Korea is estimated as 53,147,000 in this paper. We can guess at demographic transition by virtue of an estimate of simple logistic curve. In this paper we have found the fact that the demographic transition of Korea has been rapidly advancing since 1963.
韓國의 人口重心과 그 移動에 관한 硏究 : 1990年 人口總調査 結果分析 1990
崔鍾碩,장은선 충남대학교 1991 忠南科學硏究誌 Vol.18 No.2
Migration of population in Korea would be assumed to have been characterized by the transition of an external migration period into an internal migration period around 1950. In the present research to analyze the population redistribution during the period between 1955 and 1990, when the inter-regional migration in Korea had been in full swing. And then, we should like to make it clear that we have applied statistical method in dealing with this problem as follows: 1) We have relied upon the Census report for the population statistics material. 2) We have employed a map of the R.O.K. which is reduced to 1/50.000. 3) We have considered Gu.Si and Gun to be the same level in size and have dealt with them as unit region. 4) The center of population has been obtained, based on the coordinates of the unit region(X_ij, Y_ij) and the population p_ij of the concerned: ?? To sum up, the population-center in Korea could be pointed out to have the following characteristics as shown on Table 2,3 and Fig.1. 5) It can be said to be linear. 6) It can be said to have the vector of population-center advancing toward on Seoul.
崔鍾碩 충남대학교 자연과학연구소 1977 學術硏究誌 Vol.4 No.2
The multiple regression analysis is impossible in case of n≤p+1 between sample numbers n and the number of independent variables p. The fact can be easily found in the natural and social phenomena. In this research, the technique of variables selection has been dealt with by the method of principal component analysis. The multiple regression analysis can be made by selecting necessary variables in the order of the magnitude of factor loading value, from the factor loading matrix, γ(z_(k),χ_(i)=(Cov(z_(k), χ_(l)/△표참조△원본을 참조하세요 of principal component z-(k) and principal characteristics x-(i). This procedure is considered as a better method for saving time and expenses then and other methods.
崔鍾碩,林裁鶴 충남대학교 자연과학연구소 1987 忠南科學硏究誌 Vol.14 No.2
Several projects for the national economic development plannings since 1960's have brought a tremendous change in the whole nation socially, economically as well as geo-demographically Since 1970's advanced industrialization with high technology, achieving a big economic development, has accelerated urbanization, which on the other hand resulted in a serious lack of labor in the rural area. This serious unbalanced distribution of the population between the urban and the rural area has caused not only political and societal gap between the two areas but also the inefficient use of the land. We, with a very dense population, think that the above problems could be solved partly through strong policies of restraint on population growth and on population migration into the urban area. This study has been done as a base for the policies in the followings. 1. In order to observe the phenomenon of population migration, we analyze time series intra and inter-migration and total migration. 2. To investigate the cyclic phenomenon, seasanal variation analysis on one-year base is considered additionally. 3. We investigate, in macro sense, redistribution of population by showing the migration trend based on the center of population gravity and that of geographic gravity. 4. We specially focus on the population moving problem toward the metropolitan area. 5. We end up this study with the possible suggestions for the policy making on the population problem after discussing some predictions of migration trend.
崔鍾碩,申敏雄 충남대학교 자연과학연구소 1979 學術硏究誌 Vol.6 No.1
Statistical procedure for selecting variable in regression is discussed in this article. we deals the problem of establishing a linear regression equation for a particular response Y in terms of "independent" variables X_(1), X_(2), . . ., X_(k). There is no unique statistical procedure for doing this. There may be the following procedures; (1) all possible regression (2) backward elimination (3) forward selection (4) stepwise regression (5) two variations on the four previous methods (6) stagewise regression We mainly discussed the stepwise regression and applied the principal component analysis for selecting some variables. Especially, in 1973 Alan B. Forsytle introduced a stopping rule for variable selection in multiple regression. The stopping rule dealed with the notion of householder rotation and permutation test. In this article we solved some problem by this rule.
최종석 서울대학교 규장각한국학연구원 2020 한국문화 Vol.0 No.92
This article was intended to reach a more advanced understanding of the diplomatic ritual of the late Koryo dynasty, focusing on understanding the use of Beon’guk Euiju(蕃國儀注) and its characteristics. From a long-term and macroscopic point of view, the diplomatic ritual from the mongol subjugation period to the late Chosun dynasty was homogeneous. This article is an attempt to capture the historicity of Koryo’s diplomatic ritual, which are different from other periods while assuming this homogeneous fact. The main considerations are as follows: First, I explored the intention and reason that Koryo produced procedures of diplomatic ritual imitating Beon’guk Euiju(蕃國儀注). Second, I explained the reason why Koryo made procedures of diplomatic ritual by making full use of the rituals contained in Beon’guk Euiju(蕃國儀注), not by choice. Third, the official documents(公牒) such as Chamun(咨文) were only necessary to be received without any welcoming ceremony, but Koryo prepared and performed procedures of the ritual(迎大明無詔勅使儀) to greet the envoys who carried the official documents(公牒) such as Chamun(咨文). I tried to explain the reason. Finally, I explored the methods and supporting data used in the process of self-producing procedures of the ritual(迎大明無詔勅使儀) to greet the envoys who carried the official documents(公牒) such as Chamun(咨文). .