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생활 형태에 따른 뇌성마비 아동의 대동작 기능 평가 비교
고영건 ( Young-gun Ko ),오태영 ( Tae-young Oh ) 대한신경치료학회 2010 신경치료 Vol.14 No.1
The purpose of this study was to investigate difference of the gross motor function between cerebral palsy children who lived in sheltered house and those who lived home. Subject and Methods This study was a survey research Design. Participants were 19 children living G sheltered housing and 19 children living Seosan city, Dangjin province, and Yesan province. Data were collected from the 21th of February to the 11th of April, 2005. Data were analyzed by SPSS/WIN program. Results This study showed that there is significant difference of average age between sheltered group and home group. In the Gross Motor Function Measure (GMFM) result, there is significantly difference of item “B”(p<.05) .
고영건 ( Young Gun Ko ),김우겸 ( Woo Gyeom Kim ),박경태 ( Kyung Tae Park ),이종수 ( Chong Soo Lee ),신동혁 ( Dong Hyuk Shin ) 대한금속재료학회 ( 구 대한금속학회 ) 2006 대한금속·재료학회지 Vol.44 No.5
Strain hardening behavior of ultrafine grained (UFG) dual-phase (DP) steels via equal-channel angular pressing and subsequent intercritical annealing followed by water quenching was investigated at ambient temperature. The formation of UFG martensite islands of ~1㎛ was not confined to the prior pearlite colonies, but uniformly distributed throughout UFG ferrite matrix. Their room temperature tensile properties were examined and compared to those of coarse grained DP steels. Although uniform and total elongations were not degraded, the strengths of UFG-DP steels were much higher than that of coarse grained DP steels. In contrast to conventional UFG steels fabricated by equal-channel angular pressings, UFG-DP steels exhibited significant strain hardening rate, which was attributed to uniform distribution of island-typed martensite as well as grain refinement of each constituent phase throughout the microstructure. Such strain hardening behavior was discussed in relation to modified C-J analysis based on Swift relationship.
고영건 ( Young Gun Ko ),이병욱 ( Byung Uk Lee ),신동혁 ( Dong Hyuk Shin ) 대한금속재료학회(구 대한금속학회) 2011 대한금속·재료학회지 Vol.49 No.4
This work investigated the microstructure and mechanical properties of 6063 Al alloy fabricated by shear-drawing (SD) technique where shear and drawing strains were combined together within a predetermined die. To find the optimum condition for sound deformation, three different dies having different inner angle and diameter of the exit channel were prepared. After single deformation of the present sample, the sound deformation took place without an abrupt failure of the sample if the inner angle would be greater than 135˚ in this study, when the channel diameter of the SD die was reduced from 10 to 9 mm. Microstructural observation showed that the inner angle of 135˚ was found to be more effective than that of 150˚ in terms of the alignment of each grain to the shear direction imposed by SD method. In addition, the yield strength of the SD-deformed sample was twice higher than that of the initial counterpart while loosing ductility in tension.
마이크로 아크 산화처리된 마그네슘 합금의 부식특성에 미치는 과망간산칼륨의 영향
고영건 ( Young Gun Ko ),이강민 ( Kang Min Lee ),신기룡 ( Ki Ryong Shin ),신동혁 ( Dong Hyuk Shin ) 대한금속재료학회 ( 구 대한금속학회 ) 2010 대한금속·재료학회지 Vol.48 No.8
The effect of potassium permanganate (KMnO4) in an electrolyte on the corrosion performance of magnesium alloy coated by micro-arc oxidation (MAO) has been investigated in this study. For this purpose, MAO coating was carried out on the present sample under AC condition in an alkaline silicate electrolyte with and without KMnO4. Irrespective of the addition of KMnO4, it was found from structural observation that the ceramic coating layers consisted of inner and outer layers. In the sample processed in the electrolyte with KMnO4, the outer layer became dense and even contained a number of Mn2O3 atoms, resulting in high corrosion resistance. Based on the results of a potentiodynamic polarization test, it was confirmed that the coating layer formed in the electrolyte with KMnO4 exhibited better corrosion resistance than that without KMnO4. The high corrosion resistance of the MAO-treated magnesium alloy was explained in relation to the equivalent circuit model.
방사성 노블가스 측정을 위한 최소검출방사능 산출의 조절인자
박지영,고영건,김현철,임종명,이완로,Park, Ji-young,Ko, Young Gun,Kim, Hyuncheol,Lim, Jong-Myoung,Lee, Wanno 한국방사성폐기물학회 2018 방사성폐기물학회지 Vol.16 No.3
Anthropogenic radioactive noble gases formed by nuclear fission are significant indicators used to monitor the nuclear activity of neighboring countries. In particular, radioactive xenon, owing to its abundant generation and short half-life, can be used to detect nuclear testing, and radioactive krypton has been used as a tracer to monitor the reprocessing of nuclear fuels. Released radioactive noble gases are in the atmosphere at infinitesimal amounts due to their dilution in the air and their short half-life decay. Therefore, to obtain reliable and significant data when performing measurement of noble gases in the atmosphere, the minimum detectable activity (MDA) for noble gases should be defined as low as possible. In this study, the MDA values for radioactive xenon and krypton were theoretically obtained based on the BfS-IAR system by collecting both noble gases simultaneously. In addition, various MDA methods, confidence level and analysis conditions were suggested to reduce and optimize MDA with an assessment of the factors affecting MDA. The current investigation indicated that maximizing the pretreatment efficiency and performance maintenance of the counter were the most important aspects for Xe. In the case of Kr, since sample activities are much higher than those of Xe, it is possible to change the target MDA or to simplification of the analysis system.
오미영 ( Mi Young Ch ),박찬빈 ( Chan Bin Park ),고영건 ( Young Gun Ko ) 한국사회역사학회 2010 담론 201 Vol.13 No.1
This study attempted to conduct an analysis on positive illusion syndromes in Korean society. As easily confirmed by the popularity of the Secret, the bestselling books in Korea since 2007, the positive illusion syndrome has become one of the important social phenomena under the influence of the world-wide economic crisis of 2007 triggered by the sub-prime mortgage loan affair. Positive illusions refer to unrealistic views toward the self and the world as a whole. It is necessary to differentiate positive illusions from adaptive optimism in terms that the former associates with distorted perception of reality while the latter is based on realistic perception. In this context, the present study examined the relationship between positive illusions and repressive coping style. The fact that positive illusions can be explained by repressive coping style presents two implications. First, we may suffer extreme despair when we become disillusioned from positive illusions due to its impracticality. Second, we cannot attain authentic happiness just by the use of positive illusions even though they seem to provide us with temporary psychological comfort. Therefore, the necessity of mental health literacy programs is addressed in terms of enhancement of the mental health of society. These programs should focus on education of healthy and adaptive optimism along with the caution of negative effects of positive illusions and repressive coping style.