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남성형 탈모증 환자에서 시행한 모속이식술 52예에 대한 치료효과 분석
민복기,황성주,김도원,정상립,김정철,나건연 ( Pok Kee Min,Sung Joo Hwang,Do Won Kim,Sang Lip Chung,Jung Chul Kim,Gun Yoen Na ) 대한피부과학회 1997 대한피부과학회지 Vol.35 No.5
Background: There have been numerous methods to treat androgenetic alopecia but few methods to treat it effectively and permanently. Objective : The purpose of this study was to evaluate bundle hair grafting as an effective treatment for patients with androgenetic alopecia. Methods : Bundle hair grafiing was performed on 52 patients with androgenetic alopecia who had visited the department of dermatology, Kyungpook National University Hospital and Fatima Hospital. Questionaires regarding cosmetic satisfaction, side effects and general efficacy were recorded by patients themselves one year after hair grafting. Results : The results are as follows : 1. The loss of transplanted hair was most common during the third week(48.1%) after hair grafting. 2. The regrowth of the hair on the recipient site was most common during the 4th month(59.6 %) after the hair graft. 3. Bundle grafting afforded excellent cosmetic satisfaction even after one session in the alopecic area, 4. Facial edema, temporary sensory loss on the donor site, folliculitis and small pitted scarring were seen 19.2%, 5.8%, 1.9% and 3.8% of patients, respectively. 5. The disadvantages were the time necessary to carry out the procedure and the need for an experienced operator and assistants. Conclusion : We concluded that bundle hair grafting was an effective and safe therapeutic method for patients with androgenetic alopecia. (Korean J Dermatol 1997;35(5): 893-901)
저차원 나노 소재 기반 다기능 전자파 차폐 및 센싱 응용기술
민복기,이윤식,탐반누엔,슈브라몬달,최춘기,Min, B.K.,Yi, Y.,Nguyen, V.T.,Mondal, S.,Choi, C.G. 한국전자통신연구원 2020 전자통신동향분석 Vol.35 No.4
With the widespread use of high-performance electronics and mobile communications, electromagnetic interference (EMI) shielding has become crucial for protection against malfunctioning of electronic equipment and harmful effects to human health. In addition, smart sensor technologies will be rapidly developed in untact (non-contact) environments and personal healthcare fields. Herein, we introduce our recently developed technologies for flexible multifunctional EMI shielding, and highly sensitive wearable pressure-strain and humidity sensors realized using low-dimensional nanomaterials.
민복기,김성준,이윤식,최춘기,Min, B.K.,Kim, S.J.,Yi, Y.,Choi, C.G. 한국전자통신연구원 2018 전자통신동향분석 Vol.33 No.1
Tactile sensors, which are commonly referred to as pressure and strain sensors, have been extensively investigated to meet the demands for attachable and wearable electronics for monitoring the health status or activity of human users. For this purpose, the introduction of two-dimensional (2D) materials such as graphene and transition metal dichalcogenides (TMDs) with high mechanical strength at the atomic scale is very suitable for tactile sensors applicable for use in human-friendly devices. In this paper, we examine a descriptive summary of a tactile sensor and review state-of- the-art research trends of 2D material-based tactile sensors in terms of the material and architecture. Finally, we propose a roadmap for future studies into advanced tactile sensors based on our ongoing research.
카드늄을 처리한 미나리 (Oenanthe javanica)에서 전체 Thiol 잔기 , 글루타치온 , Phytochelatin의 농도 변화
민복기,최순용,이세영 ( Bokkee Min,Soon Yong Choi,Se Yong Lee ) 한국응용생명화학회 1997 Applied Biological Chemistry (Appl Biol Chem) Vol.40 No.3
In order to evaluate the usefulness of O. javanica for the phytoremediation, it was grown for 1, 3, 7, 14, 21 days and was exposed to 50 μM of CdCl₂ in hydroponic medium after 3 weeks. Its biomass and contents of chlorophylls were analyzed. The growth of O. javanica showed little difference between cadmium treated and non-treated groups, while its contents of chlorophylls of Cd-treated group decreased up to 50% compared to the case of non-treated group. Its accumulated cadmium concentrations were 2.1, 7.3 and 113 μmoles Cd/g dry weight in the leaf, stem and root, respectively. The total contents of thiol increased 0.5, 1 and 7 times in the leaf, stem and root, respectively, while the contents of glutathione tended to decrease by 43%, 70% and 47% in the leaf, stem and root, respectively. Using HPLC analysis, the reasonable peaks of thiol compounds in shoot and root of Cd-treated sample were compared to those of non-treated sample in O. javanica, and found to be phytochelatins. In case of Nicotiana tabacum cv. Xanthi tested as control plant, the cadmium treatment for 3 weeks resulted in the decrease of both biomass and chlorophyll up to 70% and 75%, respectively. The roots of tobacco became rotten and eventually died. These results suggested that Oenanthe javanica is cadmium-tolerant hyperaccumulator.
피부 표면 온도의 변화와 diffusion chamber내의 온도 변화에 따른 경표피수분손실 및 피부 장벽 회복률의 변동
민복기 ( Pok Kee Min ),김도원 ( Do Won Kim ),전재복 ( Jae Bok Jun ),정상립 ( Sang Lip Chung ) 대한피부과학회 1996 대한피부과학회지 Vol.34 No.6
Background: The epidermal permeability barrier resides in the intercellular spaces of the stratum corneum and is composed of lipids. Objective : The purpose of this study was to measure the changes of transepidermal water loss (TEWL) and the recovery rate of the epidermal permeability barrier according to the skin surface temperature(SST) using an evaporimeter after tape-stripping in vivo and after treatment with several kinds of solvent in vitro. Methods : In the in vivo study, basal TEWL and SST were measured on both flanks of the neonatal rats consisting of an!.sthetized and non-anesthetized groups. The epidermal barrier was disrupted by repeated tape-strippings which were terminated when the TEWL reached 20-50 gram/m/h. TEWL and SST were measured immediately and 2.5, 6, 10, 24, 48 and 72 hours after tape-stripping. For the in vitro study, sheets of epidermis were separated from the circumcised prepuce, and were pretreated with acetone, petroleum ether or distilled water for 6 minutes. A piece of the separated epid~ermis was placed in a diffusion chamber, and TEWL was measured with an evaporimet,er that was placed onto the top of the chamber over a temperature range of 25 37C in the chamber. Results : In the in vivo study, SST increased according to the elevation of the ambient temperature in neonatal rats with a statistical significance(p<0.05). The recovery rates of both non anesthetized and anesthetized groups increased in the higher SST especially during the first 10 hours. We observed the effect of the temperature in the diffusion chamber on TEWL after treatment with several kinds of solvent in vitro. The data obtained was plotted semi-logarithmically with TEWL as a function of temperature in the chamber, but there was no a statistical difference among the solvent treated grorps. Conclusion. According to the results of the study, SST should be clearly rnentioned in any kind of studies concerning TEWL measurement. Further studies of the relationships between TEWL and SST are needed. ~(Kor J Derrnatol 1996;34(6): 875-885)
소프트웨어 테스팅에서 위험 기반 호출 그래프를 이용한 위험 식별 기법
민복기 ( Bok Gi Min ),박지수 ( Jisu Park ),한금주 ( Gumju Han ),손진곤 ( Jin Gon Shon ) 한국정보처리학회 2015 한국정보처리학회 학술대회논문집 Vol.22 No.1
소프트웨어 테스팅의 표준인 위험 기반 테스팅은 품질에 영향을 미칠 것으로 예상되는 위험들을 식별하고 분석한 바탕으로 효과적인 테스트 전략을 세우는 방법이다. 성공적인 위험 기반 테스팅을 위해서는 위험을 조기에 식별하는 것이 중요하다. 위험 식별은 하나의 프로그램 흑은 프로젝트에 따라 이해관계자의 리뷰를 통해 주관적으로 추출하는 방법을 주로 사용한다. 그러나 이는 짧은 개발주기 안에서 변화되는 위험을 즉시적으로 식별하기 어렵다. 본 논문에서는 위험 기반 호출 그래프를 이용하여 위험을 조기에 식별할 수 있는 방법을 제안한다.