Imaging Plate에 기록된 전자회절자료의 해석

김영민,김윤중,Kim, Young-Min,Kim, Youn-Joong 한국현미경학회 2003 Applied microscopy Vol.33 No.3

Imaging plate에 기록된 전자회절 자료의 면간 거리 분석과 상동정시 나타나는 오차 요인들을 고찰하고 실험적인 보정방법을 도출하였다. 각각의 회절방향에 대한 radial intensity distribution plot과 실험적으로 도출된 면간 거리 보정식에 의해 전자회절 자료의 디지털 이미지에서 면간 거리 측정오차는 약 0.5%로 낮아짐을 알 수 있었다. Al 표준시료를 이용하여 imaging plate에 기록된 전자회절 자료의 면간 거리 편차 경향을 분석한 후 [001] gibbsite 시편에 동일한 실험적 보정을 수행하여 120분간의 전자빔 조사로부터 형성된 여러 전이 상들에 대한 면간 거리 측정 및 상 동정을 보다 정밀히 수행할 수 있었다. 그 결과, gibbsite로부터 형성된 주요 전이상들은 ${\chi}$-알루미나, ${\gamma}$-알루미나, ${\sigma}$-알루미나로 구성됨을 명확하게 동정할 수 있었다. The Experimental calibration method has been investigated to correct d-spacing estimation and to identify phases in the electron diffraction data acquired by imaging plates. When the diffraction data from the imaging plate was corrected by the d-spacing calibration method with the radial intensity distribution plotting in this experiment, The accuracy of d-spacing estimation was significantly increased in errors of about 0.5%. The experimental calibration equation followed up the first order exponential decay function was derived from the trace of d-spacing deviation between the measured and the calculated values. It was applied to the analysis of d-spacing and the phase identification of the transitional phases formed from [001] gibbsite specimen by electron beam irradiation effect. In this case more accurate phase identification and d-spacing evaluation is possible for the transitional phases whose diffraction patterns are complicatedly superimposed. It is concluded that ${\chi}$-alumina, ${\gamma}$-alumina and ${\sigma}$-alumina are clearly identified as the major transitional phases formed from gibbsite by electron beam irradiation for 120 min.

강합성 2주형 사장교의 시공중 내풍 안정성 확보 방안 연구

김영민,김대영,Kim,Young-Min,Kim,Dae-Young 한국방재학회 2008 한국방재학회 학술발표대회논문집 Vol.2008 No.1

The bridge deck section composed of a concrete slab resting on two I-beam girders are known to be susceptible to flutter instability and vortex shedding. Moreover, the cable stayed bridge in construction is more vulnerable to wind rather than in service when the free cantilever construction method is applied. This paper describes the effect of the dynamic wind loads on the bridge during construction and the effect of alternative temporary stabilizing measures. Therefore, a series of wind tunnel tests and numerical analysis were carried out to determine if any countermeasures were required.

TGA와 Py-GC/FID를 이용한 Al-MCM-48상에서 HDPE의 촉매(觸媒) 열분해(熱分解)

김영민,김승도,박영권,김지만,전종기,Kim, Young-Min,Kim, Seung-Do,Park, Young-Kwon,Kim, Ji-Man,Jeon, Jong-Ki 한국자원리싸이클링학회 2006 資源 리싸이클링 Vol.15 No.5

본 연구는 Al-MCM-48을 이용하여 HDPE를 촉매 분해하는 것으로, Al-MCM-48의 촉매 활성을 Al-MCM-41, Beta, ZSM-5와 비교하였다. Al-MCM-48를 사용한 열분해 활성은 무촉매 열분해의 활성보다 매우 높았다. 다른 촉매와 비교했을 때 Al-MCM-48의 활성화 에너지는 거의 차이가 없었다. 촉매의 점진적인 비활성화 경향도 조사하였다. ZSM-5와 Al-MCM-48은 Al-MCM-41과 Beta보다 비활성화 경향이 낮았다. Py-GC/FID(pyrolyzer)를 이용하여 열분해 생성물의 특성에 대하여 분석하였다. 그 결과 ZSM-5 촉매를 사용한 경우에는 $C_1-C_4$ 범위의 기상 생성물이 많이 생성되었다. Al-MCM-41과 Beta를 사용한 경우에는 주로 $C_5-C_{12}$ 범위의 화합물이 생성되었다. Al-MCM-48은 다른 촉매들에 비해 $C_5-C_{22}$ 범위의 오일 생성물에 대해서 높은 선택도를 나타내었다. Al-MCM-48 was used as a catalyst to decompose high density polyethylene(HDPE). Catalytic activity of Al-MCM-48 was compared with those of Al-MCM-41, Beta, and ZSM-5. Catalytic decomposition rate over Al-MCM-48 was much higher than at of non-catalytic pyrolysis only. Compared to other catalysts, Al-MCM-48 revealed the little higher activation energy value. The progressive deactivation behavior of the catalysts has also studied. ZSM-5 and Al-MCM-48 showed slower deactivation rates than Al-MCM-41 and Beta. Pyrolysis coupled with gas chromatographic separation and flame ionization detection (Py-GC/ FID) was also performed to assess the characteristics of pyrolysis products. ZSM-5 gave a higher fraction of gaseous products ($C_1-C_4$). Al-MCM-41 and Beta produced mainly $C_5-C_{12}$ products. The selectivity to oil product ($C_5-C_{22}$) obtained with Al- MCM-48 is higher an that with the other catalysts employed in this study.

사장교의 시공중 내풍 안정성 확보 방안

김영민,김대영,Kim, Young-Min,Kim, Dae-Young 한국공간구조학회 2008 한국공간구조학회지 Vol.8 No.2

단봉ㆍ회전운동이 오십견 질환자의 통증완화에 미치는 영향

최만준(Choi Man-Jun),김영민(Kim Young-Min) 한국체육과학회 2011 한국체육과학회지 Vol.20 No.3

The purpose of this study was to verify the effects of combined exercise program by Kim’s G.C that a kind of vibration exercise equipment on pain relief in frozen shoulder patients. Exercise program was operated for 12 week, control group was participated in general resistance exercise program at a public health center and exercise group was additionally participated in combined exercise program by Kim’s G.C. General resistance exercise program was operated 3days per week and combined exercise program was operated for 30 minutes after general resistance exercise program. The main results of this study was as follows: First, the ROM of exercise group was more significantly increased than that of control group(p<.001). Second, there was significant increase in the ROM of exercise group after combined exercise program(p<.001). Third, the VAS of exercise group was more significantly decreased than that of control group(p<.001). Forth, there was significant decrease in the VAS of exercise group after combined exercise program(p<.001).

Kim's Femoral Stem의 임상적 고찰

김영민(Young Min Kim),김희중(Hee Joong Kim),진종수(Jong Soo Jin),문영완(Young Wan Moon) 대한정형외과학회 1991 대한정형외과학회지 Vol.26 No.5

대규모 유류유출사고 대비 환경보건 대응계획 수립을 위한 기반연구

김영민,정해관,김종호,김종헌,고금숙,하미나,Kim, Young-Min,Cheong, Hae-Kwan,Kim, Jong-Ho,Kim, Jong-Hun,Ko, Kum-Sook,Ha, Mi-Na 대한예방의학회 2009 예방의학회지 Vol.42 No.2

Objectives : This study presents a scientific basis for the establishment of an environmental health contingency plan for dealing with accidental coastal oil spills and suggests some strategies for use in an environmental health emergency. Methods : We reviewed the existing literature, and analyzed the various fundamental factors involved in response strategies for oil spill. Our analysis included data derived from Hebei Spirit oil spill and used air dispersion modeling. Results : Spill amounts of more than 1,000 kl can affect the health of residents along the coast, especially those who belong to vulnerable groups. Almost 30% of South Korean population lives in the vicinity of the coast. The area that is at the highest risk for a spill and that has the greatest number of people at risk is the stretch of coastline from Busan to Tongyeong. The most prevalent types of oil spilt in Korean waters have been crude oil and bunker-C oil, both of which have relatively high specific gravity and contain volatile organic compounds, polycyclic aromatic hydrocarbons, and metals. In the case of a spill of more than 1,000 kl, it may be necessary to evacuate vulnerable and sensitive groups. Conclusions : The government should establish environmental health planning that considers the spill amount, the types of oil, and the distance between the spot of the accident and the coast, and should assemble a response team that includes environmental health specialists to prepare for the future oil spill.

무선 영상보안시스템 구현에 관한 연구

김영민,김명환,김선형,Kim, Young-Min,Kim, Myeong-Hwan,Kim, Sun-Hyung 한국벤처창업학회 2012 벤처창업연구 Vol.7 No.1

In this paper, implementation of a wireless video security system relates to a situation outside of using infrared sensors to detect changes when using Zigbee network security in the area of the sensor sends information to the server. The server can judge the situation if an emergency situation through the IP network security camera shot of the area to be transferred command to pantilte. The camera images and information in the security area, sent to administrator's smartphone users to control the camera can see the situation and More than a small video security system was designed so that user can monitor the security zone. Finally, for real-time to identify and respond to emergency situations based on the available wireless networks for video surveillance systems were verified through research and implementation. 본 논문은 무선 영상보안시스템 구현에 관한 것으로서, 적외선센서를 이용하여 외부의 상황변화를 감지하였을 경우 Zigbee 네트워크를 이용하여 보안영역의 센서 정보를 서버에 송신한다. 서버에서는 상황을 판단하여 긴급 상황일 경우 IP 네트워크를 통하여 보안 영역의 카메라를 촬영 하도록 팬틸터로 명령어를 전송한다. 해당 카메라의 영상과 보안영역의 정보를 사용자의 스마트폰으로 전송하며 사용자는 스마트폰을 이용하여 카메라를 제어하여 상황을 확인함으로서, 소규모 카메라 보안시스템으로도 보다 많은 보안영역을 감시할 수 있도록 설계하였다. 최종적으로 실시간으로 긴급 상황에 대해 파악과 대처가 가능한 무선네트워크 기반의 영상보안시스템에 대하여 연구 및 구현을 통하여 검증하였다.

중국 후기 제국 시기 지배 엘리트의 정체성

김영민(Kim, Young-min) 고려대학교 아세아문제연구소 2013 亞細亞硏究 Vol.56 No.1

This paper seeks to review the state of the field of Chinese gentry/local elite rule and then offer an alternative approach. I will begin with an examination of existing works on Chinese gentry rule and local elite, which shall serve as a foundation for the alternative approach I will then develop. The historical reality is never as neat and clear-cut as indicated in such influential views as Oh Keum-sung’s state-centered view of Chinese gentry, Kishimoto Mio’s analysis of local society, and Western scholars’ civil society model. In the hope of contributing to a more nuanced and historically specific understanding of the governing elite in Late Imperial China, I take seriously the methodology of intellectual history. The literary collection of Zhan Ruoshui, among other sources, represents one of the best mediums through which we can explore and discuss the complex features and subtle aspects of the governing elite in Ming China. It is my contention that it is possible to formulate a more historically sensitive notion of the governing elite’s identity than the age-old notion of state-centered gentry or local elite in making sense of the state -society relationship in late imperial China.

투과전자현미경에 타소질 불순물의 오염 최소화를 위한 실험 조건

김영민,최주형,송경,김양수,김윤중,Kim, Young-Min,Choi, Joo-Hyoung,Song, Kyung,Kim, Yang-Soo,Kim, Youn-Joong 한국현미경학회 2009 Applied microscopy Vol.39 No.1

Contaminative artifacts such as carbonaceous materials on carbon-coated microgrids are unavoidable, which is induced by electron beam exposure inside electron microscopes. This phenomenon raise a source to produce confusing information to the samples investigated by analytical TEM, which should be alleviated as much as possible. As experimental precautions for reducing this unwanted effect, the use of $LN_2$ cooled anti-contaminator and pre-illumination of electron beam at low magnification can be helpful. Nevertheless, we should be cautious to set an illumination condition for microanalysis because the contaminative effect is dependent with the types of irradiation situations, which is well known to be a decisive factor for causing the carbonaceous artifacts. Accordingly, it is necessary that optimal illumination to minimize the contaminative effect should be selected for improving the accuracy of microanalysis. In this paper, we introduce the practical method to determine the optimal illumination condition by evaluating the contaminative effect as a function of instrumental spot size, which is directly linked with electron current density.