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이윤경,한종욱,정교일,Lee, Y.K.,Han, J.W.,Chung, K.Y. 한국전자통신연구원 2007 전자통신동향분석 Vol.22 No.1
홈네트워크는 이종의 유무선 네트워크와 프로토콜이 합해져서 하나의 네트워크를 형성하기 때문에 많은 보안 헛점이 존재할 수 있다. 설사 유무선 네트워크 및 프로토콜들 각각에 대한 보안이 고려되어 있다 하더라도 이들의 혼재로 인한 새로운 취약점이 생길 수 있고, 홈네트워크 서비스를 운용하는 과정에서 새로운 취약점이 드러나고 있다. 이러한 홈네트워크에서의 보안 취약성을 해결하기 위하여 최근 국내외에서 다양한 표준이 제정되고 있고, 또한 많은 표준안들이 논의되고 있다. 본 고에서는 홈네트워크 보안에 관한 국내외 표준화 진행 현황에 대하여 소개하고, 각 표준 및 표준안의 주요 내용에 대하여 기술하고자 한다.
김영기(Y.K. KIM),최승철(SC. Choi),이진우(J.W. Lee),정교범(G.B. Chung),목형수(H.S. Mok) 전력전자학회 2010 전력전자학술대회 논문집 Vol.2010 No.7
본 논문에서는 전기자전거용 BLDC를 구동할 수 있는 구동 제어시스템을 설계하였으며, BLDC 전동기와 구동원리에 대해 특성을 파악하였다. 제어보드는 TI사의 TMS320F2808을 이용하여 6-스텝 인버터를 구동하였으며, PI제어를 적용하여 전류 제어를 통해 전기자전거용 BLDC 구동장치를 구현 하였다.
이호연,임승철,김창진,이정교,권병덕,황충진 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.4
Pedicle screw fixation is coming into wide use as an adjunct to fusion procedures for the patients with various lumbar degenerative diseases causing spinl stenosis in conjunction with traditional decompressive laminectomy. Twenty-five patients with lumbar degerative disease who underwent surgery using the pedicle screw since 1989 were review with reference to surgical outcome and problems associated with pedicle screw instrumentation of the lumbar spine. Based on return to work or activities of daily living, drug usage patterns, and complaints of pain, twenty-two patients(88%) had a successful clinical results. Major complications included three permanent nerve root deficits, one symptomatic instrument failure, one deep wound infection at donor site and two pulmonary embolisms ; one patient led to a fatal outcome. However the pedicle screw is a very effective tool of immobilization of the lumbar spine and it is recommended that more careful preoperative evaluation, batter surgical technique and experience are required to avoid the serious complications and to achieve better surgical outcome.
이호연,김창진,권양,임승철,이정교,권병덕,황충진 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.4
Twelve cases of brain abscess treated in Asan medical center during the recent 3 years from June, 1989 to December, 1992 were reviewed. The paients consisted of 6 males and 6 females. The metastatic abscess(hematogenous spread) constituted the largest group(58%), and most of them had been suffering from systemic medical disease. Headache was by far the most common symptom and the parietal lobe was the most common site. Fourteen operations in 12 patients consisted of 9 stereotactic aspirations(including 2 reoperation cases), 2 exisions, 2 ultrasono-guided aspirations, and one free-hand aspiration. Among these procedures, 12 aspirations yielded complete resolution in 9 cases(including second aspiration for another lesion in 1 patient), 1 persistent abscess requiring reoperation, and 1 mortality. The stereotactic aspiration of the brain abscess provided a surgical solution with relatively low risk in the poor candidate for receiving general anesthesia, in multiple lesions, and in lesions of deep or eloquent area.
포유동물세포에 있어 MMS 와 자외선에 의한 복제개시 및 DNA 생장억제
김영상,박상대,성노현,이치건,윤정교 한국유전학회 1983 Genes & Genomics Vol.5 No.3
Chinese hamster ovary (CHO) cells exposed to ultraviolet (UV)-light and methyl methanesulfonate (MMS), analysed by alkaline sucrose gradient sedimentation, showed an interruption of DNA replication. In UV-irradiated cells, dose-dependent response appeared; at low fluences below 1.42J/㎡ the inhibition of replicon initiation was caused and as the fluence increased the effect on replicon initiation was masked by the inhibitory effects on strand-elongation and joining. MMS also showed the inhibitory effects in dose dependent manner at both processes of replicon initiation and chain elongation of DNA. Treatment with UV and MMS concomitantly resulted in the additive inhibition effects of DNA replication.