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李基奭 中央醫學社 1942 中央醫學 Vol.11 No.2
In order to examine the fluctuation of flicker values, the author selected. 11 adults. Averge age of the subjects was 21 years, and five of the, subjects had, myopia. The subjects. were tested under the following three different experimental conditions; physical exercise by the ergometer bicycle for three minutes of 2.958 H. P. /min. dark adaptation and reading under bright illumination. The results of the above mentioned experiments were summerized as follows. 1. Flicker values decreased-3.5%N4.5% after exercise compared with the values obtained before exercise. 2. Flicker values did not change markedly before and after, reading under' the-bright, illumination, but in two cases, their values increased after reading. 3. Flicker values showed marked decrease after dark adaptation compared with those before the experiments. 4. Flicker values of the myopic group were. lower than those of the normal visual. group in all the experimental conditions mentioned above.
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Presenting Matrices of Maximal Cohen-Macaulay Modules
이기석 대한수학회 2007 대한수학회보 Vol.44 No.4
We dene a numerical invariant row CM (A) over Cohen-Mac-aulay local ring A, which is related to rows of the presenting matrices ofmaximal Cohen-Macaulay modules without free summands. We showthat row(A) = row CM (A) for a Cohen-Macaulay (not necessarily Goren-stein) local ring A.
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