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김병진(Byung Jin Kim),백승재(Seung Jae Baek),김근은(Keun Eun Kim),최종무(Jong Moo Choi) 한국정보과학회 2009 정보과학회논문지 : 시스템 및 이론 Vol.36 No.3
모듈은 동적으로 커널에 적재 가능한 오브젝트 파일로써 적재된 이후에는 커널의 권한으로 모든 자원에 대해 완벽한 접근 권한을 가진다. 따라서 잘못 작성된 모듈이나 혹은 정상적으로 작성된 모듈이라 할지라도 운영체제의 상황에 따라 비정상 수행되는 경우 시스템 전체의 안정성과 신뢰성에 치명적인 영향을 끼친다. 따라서 본 논문에서는 모듈이 발생시킬 수 있는 다양한 자원관련 문제를 해결하기 위해 커널 자원 보호자를 설계하였다. 커널 자원 보호자는 메모리, 주 번호, 워크 큐 등 운영체제가 관리하는 다양한 자원에 대한 보호를 제공한다. 제안된 기법은 리눅스 2.6.18에 실제 구현되었으며, 실험을 통해 본 논문에서 제안한 커널 자원 관리가 커널 자원을 효율적으로 보호하고 있음을 보였다. Module is an object file that can be loaded into operating system dynamically and has complete privileged access to all resources in kernel. Therefore trivial misuses in a module may cause critical system halts or deadlock situations. In this paper, we propose Kernel Resource Protector(KRP) scheme to reduce the various problems caused by module. KRP provides protections of a variety of kernel resources such as memory, major number and work queue resource. We implement the scheme onto linux kernel 2.6.18, and experimental results show that our scheme can protect kernel resources effectively.
김병진(Byung-Jin Kim),오재문(Jae-Mun Oh),우기찬(Ki-Chan Woo),윤희라(Hee-Ra Yun),양병도(Byung-Do Yang) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.6
This paper proposes PVT(Process, Voltage, Temperature) independent transconductance amplifier. The proposed transconductance amplifier uses an adaptive bias current control scheme against PVT variation. The adaptive bias current control was implemented a replica transconductance amplifier and a bias current control circuit. The proposed transconductance amplifier was fabricated with 0.18y㎛ CMOS process. The area and power consumption of the transconductance amplifier was xxx um2 and xxx W respectively. The variation of transconductance was reduced from xxx uA/V(xx%) to xxx uA/V(xx%).
조영증강 안와 전산화단층촬영 후 자연 호전된 목동맥해면굴샛길
김병진(Byung Jin Kim),박혜연(Hye Yeon Park),신혜영(Hye Young Shin) 대한안과학회 2021 대한안과학회지 Vol.62 No.10
목적: 조영제를 사용한 안와 전산화단층촬영 후 목동맥해면굴샛길이 자연적으로 폐쇄된 증례 1예를 보고하고자 한다. 증례요약: 80세 여자 환자가 내원 1개월 전 비정기적 안과 검진에서 좌안의 안압상승이 확인되었으며, 만성폐쇄각녹내장 의심하에 의뢰되었다. 좌안에서 결막충혈과 corkscrew 양상의 결막혈관의 확장을 보이며, 지속적인 고안압과 중심망막정맥폐쇄가 안저상으로 확인되었다. 이에 시행한 안와 전산화단층촬영에서 좌측 위눈정맥의 확장이 관찰되었으며, 목동맥해면굴샛길이 의심되어 진단을 위한 뇌혈관조영술촬영을 위해 신경외과에 의뢰하였다. 하지만, 2주 뒤 시행한 뇌혈관조영에서는 목동맥해면굴샛길이 관찰되지 않았다. 이후 8개월에 걸쳐 임상양상이 서서히 호전되어 목동맥해면굴샛길의 자연폐쇄가 일어났음을 추측할 수 있었다. 결론: 목동맥해면굴샛길 환자에서 조영제를 사용한 안와 전산화단층촬영 촬영 후 자연폐쇄될 가능성이 있으며, 임상증상이 호전되는 일련의 경과에 대해 아는 것이 중요하다. Purpose: We report a case of spontaneous closure of a carotid-cavernous fistula (CCF) after contrast-enhanced orbit computed tomography (CT). Case summary: A 80-year-old female was referred to our clinic under suspicion of chronic angle- closure glaucoma because of persistently high intraocular pressure commencing one month prior. Slit-lamp examination revealed a conjunctival injection and corkscrew-like vessel dilatation in the left eye, and a high intraocular pressure. Dilated fundus examination revealed central retinal vein occlusion in that eye. Contrast-enhanced orbit CT revealed a dilated, superior ophthalmic vein in the left orbit, and she was transferred to our department of neurosurgery for digital subtraction angiography (DSA); this is the gold standard imaging modality for the diagnosis of direct and indirect CCFs. DSA was performed two weeks after orbit CT; however, no CCF was visible. Thereafter, the conjunctival injection and the elevated intraocular pressure improved gradually over eight months. We suspect that the CCF closed spontaneously. Conclusions: Our case highlights the fact that a CCF can close spontaneously after contrast-enhanced orbit CT; ophthalmologists may wish to bear this in mind. J Korean Ophthalmol Soc 2021;62(10):1455-1458
김병진(Kim, Byung-jin) 대한건축학회 2018 대한건축학회논문집 Vol.34 No.8
In a state where ancient buildings was left a lot in the case of Korea, many parts do not remain the documentation, and there is a Kiwarisho lot in Japan, however, the present methods and tree split does not exist in the Korea. However, it is impossible to make a perfect building without splitting exact member when making a building. Thus will not be revealed simply by presumption that there is a similar way to wood comparatively far in Korea. Without a comparison of building dimensions and Korea calculation dimensions Kiwarisho In the first study about the proportionality of Korea, I do not know until now, other studies of the following documents which house a high approximation ratio and member size of Korea consider reason to have is impossible. View compared with respect to the axis of the building in the early stages of research first. In the case of Japan and Korea to form a tree frames in basic form that form the building, the shaft portion is easy to understand and easy compared in common is at most the shaft portion.
김병진(Kim Byung-Jim),문남수(Moon Nam-Su),박진성(Park Jin-Sung),박현우(Park Hyun-Woo),김문삼(Kim Moon-Sam) 한국소음진동공학회 2012 한국소음진동공학회 학술대회논문집 Vol.2012 No.4
Recently, Most of diverse noise of vehicles has decreased competitively according to development of the automotive manufacturing technology. Especially, Passenger car manufacturers has been conducting buzz, squeak and rattle(BSR) noise test as a method of the noise evaluation tests to reduce an unpleasant sound from interior parts on the driving the car. The purpose of this paper is to confirm the change of the noise generated in the product after the reliability evaluation. Here by the BSR test procedure used the test regulation of G company.