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Woong Soo Kim(金雄秀),Kyoung Woon Lee(李慶雲),Han Uk Lim(林漢旭),Baek Soo Suh(徐栢洙) 강원대학교 산업기술연구소 1983 産業技術硏究 Vol.3 No.-
The blast vibrations were measured from 10 places through Seoul subway area to study their effects on the structures and to establish the safe blasting limits. For purpose of the present study, particle velocity only was recorded and analyzed, because it correlated most directly with damage. The results are as follows: (1) The proagation equation, V=K(D/W1/3)⁻ was obtained. Typical values could be found for n range from 1.7 to 1.5 and for k range from 48 to 138. (2) From the relationship between schmidt hammer rebound hardness and uniaxial compressive strength, Sc=0.514×(S.H)0.23, the compressive strength at any area can be assumed. (3) The use of AN-FO and other explosives with low detonation pressure may reduce vibration levels generated.
정의석(Jeong, Ui-Seok),이동호(Lee, Dong-Ho),이경운(Lee, Kyoung-Woon),임아람(Lim, A-Ram),정재욱(Jeong, Jae-Wook),박정호(Park, Jung-Ho) 한국전기전자학회 2010 전기전자학회논문지 Vol.14 No.3
수중의 미립자 계수를 위한 Line-CCD를 이용한 수중광학 시스템을 구현하였다. 미립자 계수 측정을 위하여 680nm Laser diode를 광원으로 사용하였다. 광학시스템을 동작확인을 위해 수중 인공탱크 및 해양에서 실험을 하였다. 시스템의 상 하강 운동 시, 마이크로프로세서(FPGA)의 신호 전달(센서의 신호검출)을 통하여 미립자 계수를 알 수 있다. 시스템의 알고리즘은 또한, 깊이에 따른 압력, 온도, 계수 값을 실시간으로 분석한다. 실험을-통해 광학센서 시스템의 높은 정확도를 보여주었다. 따라서, Line-CCD를 통한 실시간 측정 가능한 수중광학 시스템을 제안 하였다. We fabricated optical sensor system that take a measurement particles using a line-CCD in ocean. To measure particles, we used 680nm laser diode which is appropriate. we tested to operate optical system in water tank and ocean. It has performance that detected signal of sensors transfer microprocessor, FPGA as long as move up and down it's motion. The system algorithm also analysis output -pressure, temperature, particle numbers in depth.-For experiment, our particle sensor system has high accuracy counter. therefore, we proposed that a line-CCD is available on optical sensor system in ocean.
실리콘 나노사이즈 광변조기를 위한 나노사이즈 단일모드 광도파로 연구
정의석(Ui Seok Jeong),이광운(Kwang Woon Lee),이동호(Dong Ho Lee),이경운(Kyoung Woon Lee),박정호(Jung Ho Park) 대한전자공학회 2016 대한전자공학회 학술대회 Vol.2016 No.6
A nano size single-mode waveguide for silicon optical modulator was designed using an Effective index method(EIM). The width of waveguide 350nm for single mode operation and the calculated optical confinement was 95.9%. The waveguide was fabricated on SOI(Silicon-On-Insulator) using e-beam lithography. The measured optical characteristics of waveguide showed a propagation loss of 4.46dB/cm and 95.19% optical confinement. A silicon optical modulator utilizing this waveguide was estimated to have 9.3 Vㆍmm modulation efficiency.
Han Uk Lim(林漢旭),Woong Soo Kim(金雄秀),Kyoung Woon Lee(李慶雲) 강원대학교 산업기술연구소 1985 産業技術硏究 Vol.5 No.-
The blast-induced ground vibrations is one of the most important factors which is considered to design blasting patterns in urban excavation. To compare with vibration level of different explosives, peak particle velocity of each explosive was measured. The results are summerized as follows. 1. Among the three kinds of explosives, the largest vibration was obtained from the gelatine dynamite, while the smallest was blasting of ammonium nitrate. 2. The vibration levels of ammonim nitrate and slurry explosive were smaller about 35%, 20% respectively than that of gelatine dynamite.
林漢旭,金雄秀,李慶雲 江原大學校 産業技術硏究所 1985 産業技術硏究 Vol.5 No.-
The blast-induced ground vibrations is one of the most important factors which is considered to design blasting patterns in urban excavation. To compare with vibration level of different explosives, peak particle velocity of each explosive was measured. The results are summerized as follows. 1. Among the three kinds of explosives, the largest vibration was obtained from the gelatine dynamite, while the smallest was blasting of ammonium nitrate. 2. The vibration levels of ammonim nitrate and slurry explosive were smaller about 35%, 20% respectively than that of gelatine dynamite.
金雄秀,林漢旭,李慶雲,徐栢洙 江原大學校 産業技術硏究所 1983 産業技術硏究 Vol.3 No.-
The blast vibrations were measured from 10 places through Seoul subway area to study their effects on the structures and to establish the safe blasting limits. For purpose of the present study, particle velocity only was recorded and analyzed, because it correlated most directly with damage. The results are as follows: (1) The proagation equation, V=K(D/W1/3)-n was obtained. Typical values could be found for n range from 1.7 to 1.5 and for k range from 48 to 138. (2) From the relationship between schmidt hammer rebound hardness and uniaxial compressive strength, Sc=0.514×(S.H)0.23, the compressive strength at any area can be assumed. (3) The use of AN-FO and other explosives with low detonation pressure may reduce vibration levels generated.
경련환아의 뇌척수액내의 당과 혈당치에 미치는 인자에 대한 연구
김국환,문경래,양은석,박진,박동호,조남수,이경운,박상기 대한응급의학회 1997 대한응급의학회지 Vol.8 No.4
Background: In febrile convulsions, glucose concentrations are known to increase both in the blood and cerebrospinal fluid(CSF). The reason behind this increase is, however, not completely understood. We have studied the effects of convulsion and fever on the CSF and blood concentrations in four different groups of children: convulsive and nonconvulsive children, with and without fever. Methods: This study was retrospectively undertaken to review medical records of 167 children who had lumbar puncture at Chosun University Hospital during 2 years from January 1994 to December 1996. The blood samples for glucose determinations were taken just before the lumbar puncture. The effects of several variables (body temperature, duration of fever, convulsions) were analysed on glucose concentrations in the CSF and blood between the groups. Results: 1) The concentration of glucose in the CSF was significantly higher in convulsive children with(90.9±24.5mg/dl) and without fever(105±29.7mg/dl) than in non-convulsive children with (68.4±12.3mg/dl)and without fever(67.5±13.3mg/dl). 2) The concentration of glucose in the blood was not significant in the different groups. 3) There was no correlation between the body temperature and the concentration of glucose in the CSF(r=0.09, p>0.05). 4) A negative correlation between the duration of the fever and the concentration of glucose in the CSF was found in febrile children(r=0.26, p<0.05). Conclusions: Our results show that an increase in the CSF glucose concentration in children may be influenced more by a stress reaction, evoked by the seizure than increased body temperature.