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方程式의 近似解法에 對하여 : 實用解析學的 方法에 依한
尹英洙 淸州大學校 1960 論文集 Vol.3 No.1
We are usually satisfieel with the explanation of existence of roots in an equation or with the simple analytical expression of the answer which sometimes results in limitless calculation! However, when we think of another side of an equation related with the concrete, practical problems in our natnre and society, we can't be satisfied wrth the simple thesretical results. In the long run, the answer which is not expressed by the practical and concrete figures in the practical, concrete, real problems, is sometimes meaningless, Accordingly to solve this problem, the method of practical analysis is to be worked ont and then the real veal value which can't be expressed is to be answered by approximation. It is what I want to discuss in this thesis. I cliel not touch the general solntion of an equation. In this thesis I don't want to introduce the unexploi ted field or to discuss and criticize the new theories, but to introduce the general tendency of modern mathematics, Practical analysis is sometines neglected by some mathematicians. Here I want to discuss this problem for the beginers whs are earnestly stndying it first of all prior to this problem, general consideration onpractical analysis has to be mentioned, but Iomitted it on account of space consideration. In Chapter Ⅰ, Main points of discussion and referred books were introduced In Chepter Ⅱ, The method of numerical solution, that is to say, the method, by tables and iteration, and the methods by Newton, Homer and Graeffe were mentioned, In Chapter Ⅲ, The methods by Segner and Lill grounded on graphical calculation and methods applying intersection chart and nomogram were introduced. In Chaptor Ⅳ, The method using a calcnlating machine was to be discussed, but I omitted it onaccornt of space consideration. I cdosed my discussion mentioning matters that demand special atlention on practical calculatcon, and modern tendency of mathematic education.
FMS에서 그룹형성에 의한 그룹내 가공부품투입순서/그룹간 가공순서결정 모델
윤영수,서승록 大邱大學校 科學技術硏究所 1995 科學技術硏究 Vol.2 No.2
This study aims to develp an algorithm to connect group formation problem with part releasing sequence in groups and group precessing sequence among groups under the hierachical operation structure in flexible manufacturing systems(FMS). For group formation, rank order clustering(ROC) algorithm is used and this algorithm is programmed by using the macro functions of QUATTRO, one of the spreadsheet packages. The part releasing sequence in groups and group processing sequence among groups are solved by the heuristic approach and 0-1 integer programming using Hanuning distance. As a case study, the effectiveness of the proposed FMS operation procedure is shown through numerical examples.
윤영수,김태성,김광명,이봉암,김국기,임언 대한신경외과학회 1985 Journal of Korean neurosurgical society Vol.14 No.1
Thirty eight studies of r-CBF were executed on 14 hydrocephalus in pre- and post-operative states by ^(133)Xe-inhalation method. In spite of the clinical improvement, the CBF in those who were checked within 3 days after the operation markedly decreased in all except one. In follow up studies, however, it showed prominently increasing tendency. Discussions were given on the hemodynamic changes in hydrocephalus.