세계 강군의 다문화 적용사례 연구

김인찬,조상근,김종훈,홍명숙,방동협,박상혁,Kim, In Chan,Cho, Sang Keun,Kim, Jong Hoon,Hong, Myung Sook,Bang, Dong Hyup,Park, Sang Hyuk 국제문화기술진흥원 2022 The Journal of the Convergence on Culture Technolo Vol.8 No.6

The Republic of Korea Army predicted that the continuous decline in fertility rate and the low birth rate, one of the biggest issues in our society, would lead to a security crisis due to a lack of military personnel, and revised the Military Service Act in 2010 to prevent enlistment of 'clearly mixed races', which had previously restricted enlistment. made it compulsory As a result, 50 children from multicultural families enlisted in the military in 2011, and the Military Manpower Administration at the time predicted that more than 8,000 people would enlist every year after 2020. This poses another challenge for the Army. A lack of understanding and respect for different languages, religions, and eating habits can lead to conflict among members, which will lead to weakening of combat power. Therefore, through a case study of multicultural application by world powers, the history of success and failure of respect for multiculturalism and the current policy of respecting multiculturalism of the U.S. Army are studied to examine the direction of our army.

비정상 3상소재의 유효전도율

김인찬,Kim, In-Chan 대한기계학회 1996 大韓機械學會論文集A Vol.20 No.3

A problem of determining the effective conductivity of a useful model of sphere-matrix type, disordered three-phase composite media is considered. Specifically, a three-phase media in which two-phase composite spheres, consisting of spheres of conductivity $k_2$((phase 2) and concentric shells of conductivity $k_3$(phase 3), are randomly distributed in a matrix of conductivity $k_1$( (phase 1) is considered. As for the structure models configuring three-phase composite media, three different structure models of PCS, PS-1 and PS-2 models are defined, which are analogous to well-established PCS, PS structure models of two-phase composite media. Futhermore, a generalized PS-PCS structure model is proposed to incorporate thesee three different models in one. Effective condectivity $k^{\ast}$of multiphaes composite media is greatly influenced by the phase connectivity of each disspersed phase material, as well as phase conductivities and phase volume fractions. Phase connectivity of three-phase PCS, PS-1, PS-2 composite media is quantified by the impentrability parameter $\lambda$. Mathematically rigorous first-order cluster bounds on $k^{\ast}$ are derived for these models of three-phase composite media, and as computation examples, first-order cluster bounds on $k^{\ast}$ for three-phase composites consisting of largely different phase conductivities are computed and compared as function of concnectivity parpmeter $\lambda$. Results and discussions are given.

도전성 플라스틱의 전도 퍼콜레이션

김인찬,Kim, In Chan 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.6

A composite plastic, where long metallic fibers are used as filling materials, is transformed from nonconducting to conducting medium as the volume fraction of filling metallic fibers is increased from zero : such drastic change in property is called the percolation. It is desired both for practical and theoretical purposes to understand the physics underlying the percolation and to estimate the percolation threshold that is defined by the minimum volume fraction of the metallic fibers for which the percolation occurs. In this study, percolation thresholds are calculated by Monte Carlo Computer simulation. Both lattice and continuum spaces are considered and detailed microstructures of metallic fibers are modelled as rigid and flexible bodies for both model spaces. Simulations are carried out for wide range of aspect ratios and discussions are given.

이류 유동장의 초확산과 무작위성

김인찬,Kim, In Chan 대한기계학회 1999 大韓機械學會論文集B Vol.23 No.9

Superdiffusive transport motions of passive scalars are numerically considered for various advection velocity fields. Calculated exponents ${\alpha}$ in the superdiffusion-defining relation ${\sigma}^2(t){\sim}t^{\alpha}$ for model flow fields agree to the theoretically predicted values. Simulation results show that the superdiffusion takes place as the tracers' motion become less random, compared to their motion at the pure molecular diffusion. Whether the flow field is random or not, degrees of superdiffusion are directly related to the velocity autocorrelation functions along the tracers Lagrangian trajectories that characterize degrees of randomness of the tracers' motion.

비정형 혼합재 이동성질의 변동

김인찬,Kim, In-Chan 대한기계학회 1996 大韓機械學會論文集B Vol.20 No.9

The notion of effective transport property of a heterogeneous medium implies that the medium is large enough that the ergodic theorem holds and local fluctuation of the property can be neglected. In case that the medium is not large enough compared to its characteristic microstructure length scale, the effective property fluctuates and differs from the value of the medium being large enough. As a representative transport phenomenon, diffusion was considered and the fluctuation of varying effective diffusion property, diffusion coarseness $C_k$, was defined as a quantifying parameter. Scaled effective diffusion property, <k$^*$>/k$_1$ and $C_k$ were computed for the two phase random media consisting of matrix of diffusion coefficient k$_1$ and spheres of diffusion coefficient k$_2$. Numerical simulations were performed by use of the so-called first passage time technique and data were collected for existing microstructure models of hard spheres(HS), overlapping spheres(OS) and penetrable concentric shells(PCS).

응급의료센터에서 아세트아미노펜 과다복용 환자의 검사실 분석 현황: 일개 중독분석실 농도 분석자료 포함

김인찬 ( In Chan Kim ),원신애 ( Sinae Won ),이아름 ( Arum Lee ),정하은 ( Haeun Jung ),이정선 ( Jeongsun Lee ),오범진 ( Bum Jin Oh ) 대한임상독성학회 2021 대한임상독성학회지 Vol.19 No.1

Purpose: Acetaminophen (APAP) is a widely available drug responsible for a large part of drug-induced hepatotoxicity in developed countries. Although acetaminophen overdose cases in Korea are being continuously reported, there are no reports related to the level of this drug in the patient’s blood or of laboratory analysis at emergency departments (ED). This study sought to analyze the acetaminophen overdose cases at a toxicological laboratory and to survey APAP analysis services offered at select EDs. Methods: We analyzed the demographic and analytic data at a toxicological laboratory run by the National Emergency Medical Center (NMC) in 2019-2020. We surveyed the APAP laboratory service in the 38 regional emergency medical centers (EMCs) and 68 local EMCs near the toxicological laboratory. Results: We studied 175 acute poisoning cases (112 women) with positive blood APAP results (mean age 47.0±24.1 years). Suicide attempts comprised 40.0% of the cases and 30.3% APAP overdose events. In the univariate analysis, we observed that patients were significantly younger, with fewer underlying medical diseases. There were a higher number of APAP overdose events, more favorable initial mental status, more toxic quantity intake in the above treatment line group (p<0.05), In multivariate analysis, the toxic amount intake was significantly more frequent in the above treatment line group (p<0.01). Hospital APAP analysis services were available in six EMCs (3/38 regional and 3/68 local). The hospital blood APAP level reporting intervals were shorter than outside-hospital laboratory services (p<0.01, regional 7.0±3.0 vs. 40.6±27.5, local 5.3±3.1 vs. 57.9±45.1 hours). The NMC toxicological laboratory reporting interval was shorter than the other outside-hospital laboratories (p<0.01, regional 5.7±0.6 vs. 50.2±22.7 local 7.5±3.0 vs. 70.5±41.5 hours). Conclusion: Over the treatment line group, toxic amount intake was significantly more frequent. Only six of 106 EMCs have their own APAP analysis service in their hospitals.

용접 자세에 따른 해양구조물용 항복강도 420MPa급 고강도강 FCA 용접부 파괴인성에 대한 연구

김인찬(In-Chan Kim),정상훈(Sang-Hoon Jeong),최한글(Han-Geul Choi),김명현(Myung-Hyun Kim) 대한용접·접합학회 2018 대한용접·접합학회지 Vol.36 No.2

The fracture toughness of flux cored arc weld metal with the yield strength 420MPa grade high strength steels for offshore structures depending on the welding position was investigated. Charpy V-notch impact test and the CTOD test of the weld metal in the horizontal and the vertical-up welding positions were carried out, and the microstructure and M-A constituents of the weld metals were observed. The recovery rate of alloying elements in horizontal position weld metal were higher than vertical-up position weld metal and the fraction of low temperature transformation phases having high dislocation density in the horizontal position weld metal was high. As a result, the yield strength, tensile strength and impact toughness of horizontal weld metal were higher than those of vertical-up position weld metal. On the other hand, the CTOD value of vertical-up position weld metal was much higher than horizontal position weld metal. This is because the M-A constituents transformation is promoted by the post-welding on the low temperature transformation region having a high local C concentration in the horizontal position welding, and therefore, the breakdown starts easily by the high M-A constituents.

해양구조물용 YS 420MPa 강재 Flux Cored Arc 용접금속의 기계적 성질에 미치는 용접 자세의 영향

김인찬(In-Chan Kim) 한국산업기술융합학회(구. 산업기술교육훈련학회) 2024 산업기술연구논문지 (JITR) Vol.29 No.1

본 논문에서는 해양구조물용 항복강도 420MPa 강재에 플럭스코어드아크용접 프로세스를 적용하여 맞대기 용접한 용접금속의 기계적 성질에 미치는 용접 자세의 영향을 연구하였다. 수평자세 맞대기 용접금속의 합금원소 회수율이 수직상향자세에 비해 높고, 높은 전위 밀도를 가지는 저온 변태상의 분율이 높게 나타났다. 이에 따라 수평자세용접금속의 항복강도, 인장강도, 충격인성이 수직상향자세 용접금속 대비 높게 나타났다. 또한 용접금속의 충격인성은 M-A상 분율보다는 용접금속 미세조직 구성과 분율에 더 많은 영향을 받았다. This study investigated the mechanical properties of flux-cored arc weld metal of 420-MPa yield-strength (YS) steels for offshore structures based on welding position. Results showed that the recovery rate of alloying elements in the horizontal-position weld metal was higher than that in the vertical-up-position weld metal, and the fraction of low-temperature transformation phases with high dislocation density in the horizontal-position weld metal was high. Consequently, the YS, tensile strength, and impact toughness of the horizontal-position weld metal were higher than those of the vertical-up-position weld metal. In addition, the impact toughness of the weld metal was affected to a greater extent by the microstructure and fraction of the weld metal itself than by the fraction of the martensite-austenite constituents.

다문화적 가치존중 리더십 교육 프로그램 개발과 효과 : 사관생도를 중심으로

송경재(Song, Kyung-Jae),김인찬(Kim, In-Chan),장유정(Jang, Yoo-Jeong),소경섭(So, Kyung-sub) 한국군사회복지학회 2020 한국군사회복지학 Vol.13 No.2

본 연구는 사관생도를 대상으로 다문화적 가치존중 교육프로그램을 개발하고, 효과를 검증하였다. 이를 위해 사관생도를 실험 집단(n=30), 비교 집단(n=30), 통제 집단(n=30)으로 구분하였으며, 세 집단 사관생도의 공감 능력, 다문화 수용성, 이중문화집단에 대한 사회적 거리감과 감정 평가에 미치는 효과를 측정하였다. 교육프로그램 진행은 다문화 교육 전문가가 아닌 생도들의 훈육을 담당하는 훈육장교에 의해 진행되었다. 수집된 자료는 SPSS 26.0을 사용하여 분석하였다. 세 집단 간 평균 차의 유의성을 검증하기 위해 공변량분석을 실시하였다. 또한 프로그램이 실험 집단을 긍정적으로 변화시켰는지를 확인하기 위해 독립표본 t 검증을 실시하였다. 그 결과 첫째, 본 연구에서 개발한 교육프로그램은 사관생도들의 공감 능력을 향상시키지 못하였으나 다문화 수용성을 향상시키는데 효과가 있었다. 둘째, 외국 이주민과 조기유학생, 다문화가정 자녀에 대한 사회적 거리감을 줄이는데 효과가 있었다. 셋째, 외국 이주민과 북한 이탈주민에 대한 감정 평가 변화에 긍정적 영향을 미쳤다. 이러한 결과를 통해, 본 연구는 교육 대상과 목적에 따라 교육프로그램을 차별적으로 개발해야 함을 제언하였다. 또한 기존의 “다문화(Multi culture)”는 “다양성(Diversity)”으로 이해해야 하며, 우리나라 특수적 다문화적 현상은 “이중문화(二重文化)” 즉 한국 문화와 외국 문화의 결합과 결합을 통한 상생이라는 의미로 이해할 것을 제언하였다. 본 연구는 다문화적 가치존중 인식 변화에 대해, 비전문가에 의한 교육프로그램 효과 확인, 교육 목적과 대상에 따른 차별적 교육프로그램 개발의 필요성을 제시한 점에 의의가 있다. This study developed a multicultural value-respecting education program for cadets and verified their effectiveness. For this purpose, cadets were divided into experimental group (n=30), comparative group (n=30), and control group (n=30), and the effectiveness on empathy ability, multicultural availability, social distance and emotional evaluation of the three groups of cadres were measured. The education program was conducted by a discipline officer in charge of the discipline of cadets who was not expert in multicultural education. The collected data were analyzed using SPSS 26.0. A covariate analysis was conducted to verify the significance of the average difference between the three groups. In addition, independent sample t-test was performed to confirm whether the program positively changed the experimental group. As a result, firstly, the education program developed in this study did not improve the empathy ability of cadres, but it was effective in improving the multicultural availability. Second, it was effective in reducing the social distance for foreign immigrants, young students studying abroad and children from multicultural families. Third, it had a positive effect on the change in emotional evaluation of foreign immigrants and North Korean defectors. Through these results, the study suggested that education program should be developed differently depending on the educational purpose and targets. Also, it suggested that the existing “multicultural” should be understood as “diversity,” and that the special multicultural phenomenon of Korea should be understood as a dual culture, meaning coexistence through the combination of Korean culture and foreign culture. This study is meaningful in that it provided verification of the effectiveness of the education program implemented by non-specialists on changes in the perception of multicultural value respect, and the need to develop differentiated education program based on educational purpose and targets.

온도차 변동에 따른 전자밸브 작동모델 실험적 연구

장갑만(Kap-man Jang),엄석화(Seok Hwa Eom),김인찬(In chan Kim),김청균(Chung Kyun Kim) 한국가스학회 2012 한국가스학회지 Vol.16 No.6

현재 국내의 모든 CNG자동차에는 용기용 밸브로 수동밸브가 부착되어 있으며 가스누출 사고 시 운전자가 차량을 정지하고 수동밸브를 잠궈야 하는 불편한 점이 있어 누출 사고 시에는 운전자 등이 가스누출사고를 대응하는데 어려운 부분이 있다. 유럽의 선진국에서는 가스누출 시 운전자가 시동을 끄면 자동으로 닫히는 구조를 가진 전자밸브의 장착을 의무화 하고 있어 우리나라에서도 기능성이 증가된 전자식 용기밸브를 적용하는 것이 CNG 버스의 안전성을 향상 시킬 수 있는 좋은 기회일 것이다. 본 논문에서는 개개의 전자밸브의 작동상태를 운전자가 파악하기 어려운 구조적인 문제를 보완하기 위해서 충전 중 압력의 상승에 따라서 온도가 상승하는 현상에 착안하여 문제에 접근하였다. 충전 중 온도상승이 압력차에 따라서 약 30℃ 이상이 발생하는 것을 이용하여, 데이터 확인 시 온도상승이 발생하지 않는 용기는 밸브가 작동하지 않아 충전이 이루어지지 않는 것으로 판단할 수 있는 실험적 결론을 얻었다. Currently, all domestic CNG vehicles have manual cylinder valves installed. These are inconvenient for drivers in case of a gas leak accident, because drivers have to stop the vehicle operation and manually close the valve. It makes difficult condition for drivers to quickly and properly respond to such accidents. In advanced European countries, they require Automatic cylinder valve installation, which has a structure where the valve is automatically shut off when the driver turns off the ignition in case of a gas leak. If this electric valve system is introduced in Korea, the safety of CNG buses will be improved with better functionalities. In this paper, in order to solve the structural problem of difficulty for a driver to identify the operational status of individual Automatic cylinder valves, an approach was made regarding temperature increase with pressure increase during CNG filling. it was estimated that the temperature increased approximately more than 30℃ due to pressure difference during the filling. Therefore, it was concluded from the experimental data that the valve of the container whose temperature did not increase did not operate, resulting in filling failure.