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朴章炫(Jang-Hyun Park) 한국차학회 1997 한국차학회지 Vol.3 No.1
Difference of chemical constituents at different position in tea shoot(Camellia sinensis var. yabukita) of the first, second and third crop was investigated. Result of this analysis are summarized as follow. The contents of tatal nitrogen, tannin, caffeine, amino acid, theanine and Vit.C was decreased in leaves of lower position, but that of chlorophyll was increase. The contents of fatty acids was increased to 3rd lear, but was decreased 4th leaf, showing higher content in the leaves than that in the stem. The contents of ammonium, potassinm and magnesium were rich in the leaves of upper position, while that of sodium and calcium were rich in the leaves of lower position. The contents of total nitrogen, amino acid, theanine and Vit. C were rich at earlier pluckin seasons. The content of fatty acids at the 1st and 2nd plucking season was contained more amount than that of the 3rd plucking season The content of chrolophyll at the 2nd plucking season was contained more amount than that of the 1st and 3rd plucking season.
PREDICTIVE SYNCHRONIZATION VIA CHUA'S CIRCUITS
朴廣炫 忠州大學校 1998 한국교통대학교 논문집 Vol.33 No.2
This paper examines predictive synchronization using the coupled chua's circuits which are simple electronic network to exhibit chaotic behavior. The idea of predictive synchronization is based upon the concept of faster synchronization. The results of pSPICE simulations for a working circuit using off-the-shelf components are presented.
朴廣炫 충주대 산업과학기술연구소 2001 産業科學論文集 Vol.9 No.-
This paper shows the method of variation for the synchronization velocity and the problem (or the limitation) of faster synchronization in chaotic circuits. The variation of velocity of the synchronization can be done by changing a ration of the values of the elements correspondingly in the two Chua's circuits with using the coupled synchronization method, but there is inharmonious shape due to a ration of the element values or linear diffusion coupled resistance. To obtain the experimental trajectory, the simulations was performed with the pSPICE tool, and the results of simulations are presented.
朴東炫,韓錫洪,禹廷鉉 대한신경외과학회 1980 Journal of Korean neurosurgical society Vol.9 No.2
In human and dog the blood clot formed in the presence of cerebrospinal fluid and incubated at 37-37.5℃ for 24 hours, was inoculated in the subdural space and abdominal subcutaneous tissue of dog homogenously, and in human abdominal subcutaneous tissue-autogenously. The chronological change of these inoculated bl6od clots was investigated and histological study was performed in cases with evolusion comparable to human chronic subdural hematoma. Following results were obtained. 1) In both human and dog, the blood clot formed by mixture of fresh blood and cerebrospinal fluid and inoculation for 24 hours was surrounded by elastic membranous structure-which was histologically proved to be composed of delicate fibrin network. 2) In the animals inoculated with pure blood clot in subdural space, this clot regressed and was absorbed. 3) In the animals inoculated in subdural space with the blood clot formed in presence of cerebrospinal fluid, inoculated clot grew gradually and was encapsulated and liquified 1 week after inoculation. The wall of the older hematoma was thicker and was more infiltrated with neovascularization than that of young hematoma. 4) In animal experiment for subcutaneous inoculation with blood clot, formed with mixing cerebrospinal fluid progressed to hematoma comparable to human chronic subdural hematoma. On other hand, in experiment using pure blood clot no hematoma developed, 5) With no difference in clots formed under either presence of C.S.F. or absence of it, all blood clots inoculated in human subcutaneous tissue were absorbed within a few days and changed to the granulation tissue. Thus it was inferred that the C.S.F. was closely related to induce the capsule formation of chronic subdural hematoma.