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중격측좌핵 및 선조체기저핵의 아미노산 함량에 대한 한쪽 뇌 해마 제거의 영향
남준철,김종규 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2
We analyzed the amino acid contents of fundus striatal and accumbens septal tissue in unilateral hippocampectomized rats by high performance liquid chromatography(HPLC). Thirty-one male rats were divided into hippocampal, cortical control and normal control groups. After a survival period of 7 days, the animals were sacrificed by decapitation. Two to three milligrams of tissue were removed from the nucleus fundus striati and the nucleus accumbens septi in ipsilateral or contralateral side of the brain. In the nucleus accumbens septi, the contents of glutamate were reduced significantly in the ipsilateral hippocampal group and increased significantly in the contralateral hippocampal group than in the normal control group and the cortical control group, while there were no significant differences between the 2 control groups. The contents of glycine were reduced significantly in the contralateral hippocampal group than in the normal control group and the cortical control group. But in the nucleus fundus striati, the difference of contents of all amino acids were nonsignificant. From the above results it is suggested that the ipsilateral hippocampus may exert a direct effect on the accumbens septi than the contralateral hippocampus.
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허건수,남준철 한국공작기계학회 2003 한국공작기계학회 춘계학술대회논문집 Vol.2003 No.-
It was shown that the robustness of deterministic observers with respect to modeling errors, measurement bias and round-off errors can be represented by a single performance index, the condition number of the observer eigenvector matrix. In this paper, a robust observer for multi-output systems is designed using the left eigenstructure assignment, where the observer gain can not be determined uniquely with respect to the desired observer poles. Utilizing the eigenstructure assignment for the robustness of the observer, the desired eigenvector matrix is selected to achieve the observer eigenvector matrix with the small condition number. The performance of the designed robust observer is evaluated in a spindle-drive simulation example where the load speed to be estimated based on the measured signals.