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횡단절편을 이용한 정상 두피와 원형탈모증 병변의 병리조직학적 관찰
정진호,은희철 ( Jin Ho Chung,Hee Chul Eun ) 대한피부과학회 1991 대한피부과학회지 Vol.29 No.4
N/A Histopathologic Findigs of Normal Scalp and Alopecia Areata in Transverse Sections Jin Ho Chung,M.D., Hee Chul Eun, M.D.* Department of Dermatology, Capital Armed Forces General Hospital Seoul, Korea Department of Dermatology*, College of Medicine, Seoul National University, Seoul, Korea To observe the normal transverse histopathological findings of the follicles in the human scalp, a 4-or 6-mm punch biopsy specimen was taken from the normal scalp in 5 normal adults and 10 alopecia areata patients. We cbserved the normal transverse findings of the follicles in the transverse sections of normal scalps. The histopathological findings of the transverse sections taken from patches of 10 alopecia areata patients were also observed. The results were as follows ; 1) The follicular unit which usually consisted of 2-4 terminal follicles and I vellus follicle, sebaceous lobules and arrector pili muscles was observer in transverse section. The normal density of follicular units was about 0.62/㎣. 2) There were differences in the transverse sectional findings of the hair follicle according to levels, such as mode of keatinization in outer root sheath. 3) In the transverse section of the scalp biopsy specimen, it was possible to differentiate the various phases of the hair growth cycle. 4) The transverse sections of the patches in alopecia areata showed that 23%-100% of follicles were in telogen stage. 5) The observation of transverse sections of scalp biopsy specimen seems to be a useful method in the histopathologic study of the hair follicle disorders particularly alopecia areata.
8 - Methoxypsoralen이 Phytohemagglutinin 으로 자극시킨 림프구의 DNA합성에 미치는 영향
정진호,김규한,윤재일,이주흥 ( Jin Ho Chung,Kyu Han Kim,Jai il Youn,Joo Heung Ree ) 대한피부과학회 1992 대한피부과학회지 Vol.30 No.5
N/A We have observed the dark effect of 8-methoxypsoralen(8-M(P) on the viability and DNA synthesis in human lymphocyte cultures after stimulaticn with phytohemagglutinin (PHA) in the absence of ultraviolet A radiation. The concentratioiis of 8-MOP was 0.5-32 ug/ml. We have also measured the LDH activity in supernatant. of lymphocyte cultures treated with 8-MOP. The results were as follows: 1. There was no 8-MOP dose-dependent decrease in the viability of lymphocytes up to 8- MOP 32pg/ml. 2. There was a 8-MOP dose-dependent decrease in PHA-induced DNA synthesis of lymphocytes from the concentration of 8-MOP 2 ug/ml. 3. There was a time-dependent decrease in PHA-induced DNA synthesis of lymphocytes at the concentration of 8-MOP 32 ug/ml. 4. There was no LDH release in supernatant of lymphocyte ciltu es after incubation with 8-MOP up to 8-MOP 32ug/ml. (Kor J Dermatol 992;30(5):601-607)
정진호,윤재일 ( Jin Ho Chung,Jai Il Youn ) 대한피부과학회 1991 大韓皮膚科學會誌 Vol.29 No.6
N/A We have investigated the effect of PUVA(8-methoxypsoralen and ultraviolet A) on the viability and DNA synthesis in human lymphocyte cultures after stimulation with phytohemagglutinin(PHA) using various concentrations of 8-MOF(0㎍/㎖, 0.01㎍/㎖, 0.1㎍/㎖, 1㎍/㎖) and doses of UVA radiations(0J/㎠, 0.1J/㎠, 0.5J/㎠, 1J/㎠). The results were as follows ; 1. There was a UVA dose-dependent decrease in the viability of lymphocytes at every 8-MOP concentrantion. In the 0.01㎍/㎖ 8-MOP treated group, there was a statistically significant decrease in viability from 0.5J/㎠ UVA in the 3 and 5 day cultures. In 0.1㎍/㎖ 8-MOP group, there was a significant decrease in culture viability from 2J/㎠ UVA at 1 day. 0.5J/㎠ UVA at 3 days, 0.1J/㎠ UVA at 5 days and in the 1㎍/㎖ 8-MOP group, from 1J/㎠ UAV at 1 day, 0.1J/㎠ UVA at 3, and 5 days. 2. There was a 8-MOP dose-dependent decrease in viability of lymphocytes. In the 0.1J/㎠ UVA exposed group, there was a statistically significant decrease in viability from 1㎍/㎖ 8-MOP in the 3 day old culture, and 0.1㎍/㎖ 8-MOP at 5 days. In the 0.5J/㎠, 1J/㎠ and 2J/㎠ UVA exposed groups, there was a significant decrease in viability from 0.1㎍/㎖ 8-MOP in the 3 and 5 day old cultures. 3. There was a UVA dose-dependent decrease in DNA synthesis after stimulation with PHA in lymphocytes. In the 0.01㎍/㎖ 8-MOP treated group, there was a significant decrease in DNA synthesis from 0.5J/㎠ UVA, and in 0.1㎍/㎖ 8-MOP, and 1㎍/㎖ 8-MOP groups, there was a decrease from 0.1J/㎠ UVA. 4. There was a 8-MOP dose-dependent decrease in DNA synthesis. In the 0.1J/㎠ UVA exposed group, there was a significant decrease in DNA synthesis from 0.1㎍/㎖ 8-MOP and in 0.5J/㎠, 1J/㎠, 2J/㎠ UVA groups, from 0.01㎍/㎖ 8-MOP.
M진 Sidel'nikov 수열의 $F_p$ 상에서의 선형복잡도와 1-오류 선형복잡도
정진호,양경철,Chung, Jin-Ho,Yang, Kyeong-Cheol 한국통신학회 2006 韓國通信學會論文誌 Vol.31 No.12C
본 논문에서는 $M\geq3$이고 $p\equiv{\pm}1$ mod M인 경우에 대해서 주기가 $p^m-1$인 M진 Sidel'nikov 수열의 $F_p$ 상에서의 선형복잡도의 하계와 1-오류 선형복잡도의 상계를 유도한다. 특히 $m\geq4$이고 $p\equiv-1$ mod 3인 경우에는 3진 Sidel'nikov 수열의 정확한 1-오류 선형복잡도를 계산한다. 이 결과들을 바탕으로 선형복잡도와 1-오류 선형복잡도의 주기에 대한 비율의 근사적 특성을 제시한다. In this paper we derive some lower bounds on the linear complexity and upper bounds on the 1-error linear complexity over $F_p$ of M-ary Sidel'nikov sequences of period $p^m-1$ when $M\geq3$ and $p\equiv{\pm}1$ mod M. In particular, we exactly compute the 1-error linear complexity of ternary Sidel'nikov sequences when $p^m-1$ and $m\geq4$. Based on these bounds we present the asymptotic behavior of the normalized linear complexity and the normalized 1-error linear complexity with respect to the period.
정진호,Chung, Jin-Ho 한국전기전자학회 2022 전기전자학회논문지 Vol.26 No.3
In a secret sharing scheme, secret information must be distributed and stored to users, and confidentiality must be able to be reconstructed only from an authorized subset of users. To do this, secret information among different code words must not be subordinate to each other. The minimal code is a kind of linear block code to distribute these secret information not mutually dependent. In this paper, we present a novel extension technique for minimal codes. The product of an arbitrary vector and a minimal code produces a new minimal code with an extended length and Hamming weight. Accordingly, it is possible to provide minimal codes with parameters not known in the literature.
정진호(Jin-Ho Chung),양경철(Kyeongcheol Yang) 한국통신학회 2008 韓國通信學會論文誌 Vol.33 No.1C
주기 수열에서 각 주기의 임의의 위치에 r개의 심볼을 추가하는 경우, 더 긴 주기를 가지는 수열을 얻을 수 있다. 본 논문에서는 주기 수열에 r개의 심볼을 추가한 수열의 선형복잡도에 대한 기존 결과들을 정리하고 GF(p)상에서 정의된 최대주기 수열에 1개의 심볼을 추가함으로써 얻어지는 수열들의 선형복잡도의 분포를 분석한다. 그리고 이진 최대주기 수열들의 1-심볼 추가 k-오류 선형복잡도에 대한 새로운 사실들을 유도함으로써 수열의 안정성을 평가한다. From a periodic sequence, we can obtain new sequences with a longer period by r-symbol insertion to each period. In this paper we review previous results on the linear complexity of periodic sequences obtained by r-symbol insertion. We derive the distribution of the linear complexity of 1-symbol insertion sequences obtained from m-sequences over GF(p), and prove some relationship between their linear complexity and the insertion position. Then, we analyze the k-error linear complexity of the 1-symbol insertion sequences from binary m-sequences.