人口豫測模型에 관한 硏究(1985)

崔鍾碩,申鉉山,姜正求 충남대학교 자연과학연구소 1986 忠南科學硏究誌 Vol.13 No.1

In this paper, the population projection is estimated by the method of extrapolation which is based on logistic curve. It is required that each time interval of input data is one year. But census is not usually done punctually. So we try to use the raw census data and corrected them by appropriate transformation. For the population projection, we use four kinds of data : Model Ⅰ annual report from 1955 to 1985, Model Ⅱ linear correction of inter census population from 1955 to 1985, Model Ⅲ Compound interest correction on inter census population from 1955 to 1985, Model Ⅳ five years moving average correction of all inter census population. Estimation by model Ⅰ is not good because of large error caused from wrong estimation of population between census. We get a low projection model Model Ⅱ P=5,314/(1+1.4904 EXP (-0.050756t)) × 10 exp((4) from the second try, a high projection model Model Ⅲ P=5,429/(1+1.5438 EXP (-0.04973t)) × 10 exp(4) from the third try and a medium projection model Model Ⅳ P=5,379/(1+1.5190 EXP (-0.050392t)) × 10 exp((4) from the fourth try. We can guess at a saturation population and at a demographic transition point by virtue of an estimation of this logistic curve. The saturation population of Korea is estimated as 5,314×10 exp (4) by model Ⅱ in this paper. We have found the fact that the domographic transition point of Korea has been rapidly advancing since 1963.

韓國의 人口移動에 관한 硏究

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.

금강유역 수질오염 실태조사

최신석,오희목,강명규,조통래,이규승,유종국,이영하 忠南大學校 環境問題硏究所 1988 環境硏究 Vol.6 No.1

조사 구역 상류 지점의 평균 수질은 pH가 7.1, DO가 8.3mg/ℓ, BOD가 1.7mg/ℓ, COD가 1.7mg/ℓ, SS가 15.4mg/ℓ, 분변성 대장균이 1.1x10³ MPN/100ml고 상수원 수 1급 내지 2급의 양호한 상태이고 하류지점의 수질은 pH가 6.8, DO가 7.7mg/ℓ, BOD가 2.2mg/ℓ, COD가 2.4mg/ℓ, 분변성 대장균이 1.7x10³MPN/100ml로 상수원 수 2급 내지 3급의 상태를 나타내 하류로 내려가면서 오염도가 증가하는 것으로 나타났다. 청주시의 영향을 크게 받는 미호천 하류의 평균수질은 pH가 7.2, DO가 6.3mg/ℓ, BOD가 16.2mg/ℓ, COD가 15.1mg/ℓ, 분변성 대장균이 1.6x10??MPN/100ml로 심각한 오염 상태를 보여 청주시와 대전시가 금강 본류의 주 수질 오염원으로 나타났다. 영양 염류 (NH₃-N, NO₂-N, NO₃-N, PO₄-P)와 무기성 유해 성분 (Cl-, CN-, F-)의 함량은 지천의 일부 지점을 제외하고는 극히 낮은 수준으로 검출되었으며, 유기인, 페놀류, PCB 성분은 조사기간 중 전혀 검출되지 않았다. 또한 Fe, Zn, Cu, Mn, Cr, Pb, Cd, Hg등의 중금속은 검출되지 않거나 하천 수질 기준 또는 식용수 수질 기준의 허용치를 초과하지 않는 양호한 수준으로 나타났다.

冪級數와 解析函數의 테일러 展開

노석,최종호 群山大學校基礎科學硏究所 1999 基礎科學硏究 Vol.14 No.-

A function f(χ) is said to be analytic at a point χ= a if it has a Taylor series expansion in a neighborhood of χ = a. In this thesis we survey some theoretical results in power series and analytic functions. We first prove Taylor theorem with three types of remainder term - Lagrange, Cauchy and integral types, respectively. As a consequence we give Taylor series expansion of some analytic functions including binomial expansion. We also study some related theorems ; Bernstein's theorem which gives a sufficient condition that a function has a Taylor expansion at χ= b in a half interval [b, b+r), Abel's limit theorem and Tauberian theorem which give some conditions that a function has a power series expansion at a boundary point of the radius of convergence.

韓國의 人口再分布에 관한 計量的 分析

崔鍾碩,장은선 충남대학교 1996 忠南科學硏究誌 Vol.23 No.1

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 1975's, advanced industrialization with high technology, achieving a highly 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, seasonal 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 end up this study with the possible suggestions for the policy making on the population problem after discussing some predictions of migration trend.

대퇴박근 근피판을 이용한 Fournier's gangrene치험례

이석기,이종원,이형주,임풍 大韓成形外科學會 1991 Archives of Plastic Surgery Vol.18 No.1

Fournier's gangrene is a progressive tissue necrosis of scrotum, this disease commonly occured in alcoholics and diabetic patients. 60 year old patient shows toxic symptom and even sepsis, but the scrotal content is to be spared. The treatment of this disease is adequate debridement and administration of sensitive antibiotics. If the scrotal content is exposed, the defect can be covered with skin graft, local flap, etc. But, when the scrotum shows marked fibrosis or inflammation, myocutaneous flap is inevitable. We experienced one case of scrotal defect due to Fournier's gangrene, which was successfully covered with gracilis myocutaneous flap.

데이타흐름 시스템에서의 성능평가에 관한 연구

유관종,최종석,신지수,변승환 충남대학교 자연과학연구소 1989 忠南科學硏究誌 Vol.16 No.1

A concept of data flow computer is a radical departure from that of Von Neumann type computers since the central concept of sequential execution is discarded. Data flow model offers an entirely new way of view the execution of program. This paper describes the data flow graph partitioning algorithm for enhancing the efficiency of the data flow architecture which consists of Processing Elements, Distributor, Arbitrator and Global Memory, and evaluate the performance of the proposed data flow system.

Polyacrylamide Gel전기영동법에 의한 생유 및 살균처리유의 Whey 단백질 조성에 관한 비교 연구

남궁석,우세홍,조종후 한국식품위생학회 1990 식품위생학회지 Vol.5 No.4

생유와 시판되고 있는 저온살균유, 고온순간살균유 및 초고온순간살균유 각 20 예에 대하여 polyacrylamide 겔 전기영동법으로 Whey 단백질의 조성을 구하였다. 생유의 Whey 단백질 중 혈청 albumin, α-lactalbumin, β-Iactoglobulin의 조성은 3.71 : 11.44 : 84.85 였으며 저온살균과 고온순간살균에 의하여 큰 변화를 주지않았다 그러나 초고온순간 살균으로 조성비는 0 : 64.75 : 35.5로 변화되어 혈청 albumin 의 소설과 β-lactogiobuiin의 큰 감소를 보였다. 살균처리유의 냉장보존 3 일째에 a-lactalbumin과 β-lactoglobulin의 감소가 있었으나 25℃ 살온보존에서는 변화가 없었다. 고온순간 살균유는 실온보존 2일째에 혈청 albumin, 3일째에 a-Lactalbumin의 감소만 있었고 다른 whey 단백질은 보존온도에 관계없이 3일간 농도변화가 없었다. 초고온순간살균유는 냉장보존 2일째 혈청 albumin의 감소만 인정되었다. Whey proteins in milk were analyzed by polyacrylamide gel electrophoresis and compared with respect to electrophoregrams, densitograms and concentrations of whey proteins in raw and market milk classified according to 3 kinds of pasteurization by low temperature long time, high temperature short time and ultra-high temperature short time. Relative composition of major whey protein constituents such as bovine serum albumin, a lactalbumin and f1-lactoglobulin in raw milk were 3.71:11.44:84.85 and not affected by low temperature long time and high temperature short time pasteurization, even though there were the tendencies of some declining in the actual concentrations. But by ultra-high temperature short time pasteurization compositions of whey protein were changed to 0: 64.75: 35 in which reflected the disapprearance of bovine serum albumin and the extensive decrease of f1-lactoglobulin. Storage of low temperature pasteurized milk at 5℃ resulted in a slight decrease of α-lactalbumin an β-lactoglobulin, but storage at 25℃ did not make any changes until3rd days of storage. Most of whey proteins in high temperature short time pasteurized milk were not affected during storage at 5℃ and 25℃, but bovine serum albumin and α-lactalbumin diminished in 2-3 days of storage. Whey proteins of milk treated with ultra-high temeperature were not affected during storage at 5℃ and 25℃, except a slight decrease of a lactalbumin in 2nd day of storage at 5℃.

BAF 공정을 이용한 제직폐수의 재이용

정용준,배종홍,권구호,민경석 한국물환경학회 2004 한국물환경학회지 Vol.20 No.6

An upflow BAF(Biological Aerated Filter) equipped with an expanded clay media was applied to reuse weaving wastewater of water jet loom. The performance of lab-scale biofilter was investigated by the adjustment of EBCTs(Empty Bed Contact Time) and the packing ratio of media, which were changed 1.1 to 3.7hr and 38 to 63%, respectively. In most conditions except 1.1hr of EBCT, BOD, CODcr, SS and Turbidity of the effluent were 1∼4㎎/L, 7∼16㎎/L, 1∼5㎎/L and 5∼14NTU, where their removal efficiencies were 76∼95%, 82∼93%, 63∼94% and 59∼81%, respectively. From the observation of SEM(Scanning Electron Microscope) photographs of porous clay media, it was revealed that this media provided good performance of retaining microbes effectively. In addition, 0.44∼0.49㎏VSS/㎏BOD_(rem). of low sludge reduction was expected. The most efficient back washing cycle and procedure were once per 4 to 9 days and air including collapse-pulsing method, respectively. Therefore, this system can be of use as an weaving wastewater treatment for reuse

數理的 外揷法에 의한 韓國의 人口豫測 模型에 관한 硏究

김용문,최종석 충남대학교 자연과학연구소 1993 忠南科學硏究誌 Vol.20 No.1

In the paper, a study on Korea Population Predictive Model by the Method of Mathematical Extrapolation is based on Logistic Curve and Gompertz Curve. Data used census data from 1955 to 1990. But census is not usually done punctually. So we try to use the raw census data and correct them by approprate transformation. We can guess Population Predictive Medel and Increasing Rate and Transition point and Saturation Population. Logistic Curve and Gompertz Curve estimated model optimum curve by the Method of Mathematical Extrapolation.