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Novel Insights into Wound Healing Sequence of Events
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일반논문 : 유학의 감성철학과 그리스도교 영성생활 간의 철학적 비교 고찰 -수양론적 관점을 중심으로-
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낙동강 하천 수리특성 분석 및 수리모의 예측기법 개발 = Analysis of hydraulic characteristics and development of hydraulic modeling technology for total water pollution management for the Nakdong river
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헬스케어 모바일 앱 활성화 정책 연구
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Women^ Feminism^ and Confucianism in Vietnam in the Early 20th Century
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베트남 설화 <금구전(金龜傳)>과의 비교를 통해 본 <호동왕자와 낙랑공주>의 문학치료적 의미
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김현민,최창식,최윤철,이리형 한국구조물진단유지관리공학회 2007 한국구조물진단유지관리공학회 논문집 Vol.11 No.4
건축의 증가나 자원의 효율적인 활용의 관점으로부터 기존 건축물에 대한 리모델링이 주목을 받고 있다. 리모델링 공사로 인해 기존벽에 개구부를 설치하는 경우 보강 방법을 검토 하는 것을 목적으로 철근콘크리트벽의 정적가력 실험을 실시하였다. 보강 방법은 개구부 주위의 탄소섬유시트 강판 부착으로 했다. 실험체는 실존하는 철근콘크리트 구조물을 1/2 축소 모델로 제작하였다. 실험결과 개구부 주위의 전단 파괴로 최종 파괴되었으며 보강 방법에 따라 내력의 상승 효과는 다르게 나타났다. A series of three shear wall specimens were tested under constant axial stress and reversed cyclic lateral loading to evaluate the capacity of seismic retrofit proposed for the shear wall with the opening induced by remodeling. One specimen was tested in the as-built condition and the others were retrofitted prior to testing. The retrofit involved the use of carbon fiber sheets and steel plates (thickness ; 3mm) over the entire face of the wall. Specimens were 1/2-scale representations of a one-story wall in a Korean apartment building that was built in 1980. The test results showed that failure mechanism of specimens governed by shear fracture and the strength of specimens was varied with according to the retrofitting strategies.
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Local convergence of functional iterations for solving a quadratic matrix equation
김현민,김영진,서종현 대한수학회 2017 대한수학회보 Vol.54 No.1
We consider fixed-point iterations constructed by simple \linebreak transforming from a quadratic matrix equation to equivalent fixed-point equations and assume that the iterations are well-defined at some solutions. In that case, we suggest real valued functions. These functions provide radii at the solution, which guarantee the local convergence and the uniqueness of the solutions. Moreover, these radii obtained by simple calculations of some constants. We get the constants by arbitrary matrix norm for coefficient matrices and solution. In numerical experiments, the examples show that the functions give suitable boundaries which guarantee the local convergence and the uniqueness of the solutions for the given equations.
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구조해석을 통한 사판식 유압펌프의 손상원인 및 강도개선 연구
김현민,윤효진,서현수 한국기계기술학회 2016 한국기계기술학회지 Vol.18 No.3
The suspension system of special tracked vehicle is using hydraulic piston pump to adjust track tension and control vehicle position change. During operation of vehicle on rough field, failure of suspension control was occurred due to the piston pump failure. In this study, investigation was performed to analyze the cause of hydraulic piston pump failure. Main reason of piston pump failure is strong peak pressure and insufficient structural safety of shoe. The static stress analysis considering peak pressure was performed to find the weak point of the shoe. From the result, it is confirmed that pass hole of lubrication is the weakest point. Improved piston shoe shows 27% decrease in maximum stress and satisfies the design target which is less than 40% of stress margin.
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진동특성을 고려한 차륜형장갑차 브래킷 손상에 대한 실험 및 해석적 분석
김현민,성수민,김천일 국방기술품질원 2021 국방품질연구논집 Vol.3 No.1
The bracket to fix the coolant pipe of the powerpack has been frequently damaged during the operation of the wheeled armored vehicles. This study was concerned with the causes of the bracket failure and the direction of the improvement. First, the failure pattern was observed on the failure surface of the bracket. Then, the stresses and acceleration data were measured to find vibration characteristics of the bracket using strain gauge and acceleration sensors, respectively. The cause of failure was found to be the fatigue due to the resonance of the bracket at the idle rpms of the engine. To avoid the resonance, the shapes of the brackets are presented based on the modal analysis. The improved shape was required to reduce the resonance frequency by reduction of its stiffness because of the extents of the engine rpms. The improved shape for avoiding the resonance results in the acceleration level decreased to 73% of the previous one. In addition, the maximum stress, from the static analysis, was decreased to 67% of the previous one. Conclusively, the failure of the bracket was the fatigue due to the vibration resonance, and to avoid the failure the stiffness of the bracket was decreased. It is expected that the reliability of the powerpack will be improved for the wheeled armored vehicles.
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김현민,김남권,남순호,이혜윤,Kim, Hyun-Min,Kim, Nam-Kwen,Nam, Soon-Hoo,Lee, Hye-Yoon 대한예방한의학회 2018 대한예방한의학회지 Vol.22 No.2
Objectives : This study was conducted to investigate the frequent diseases among the people who had been treated by collaborative treatment of Korean medicine and Western medicine, and to compare their medical use behaviors before and after the collaborative first-stage pilot project between Korean medicine and Western medicine. Methods : 4,467 patients were identified as the patients who are participated in the collaborative first-stage pilot project between Korean medicine and Western medicine during the period between July 15, 2016 and March 31 2017. We used 28,480 records of Korean national health insurance claim data from January 1 2016 to March 31 2017 to analyzed present condition of cooperative medical usage. Also we conducted a paired t test to compare the percentage of collaborative treatment days before and after the pilot project period. Results : We found that the most frequent diseases treated in the pilot project were the diseases of musculoskeletal and nervous system and then 10 major diseases such as H, K, J, C (D), N, L, E, A, H and F disease codes in order. Also it was confirmed that 14 major and 53 medium diseases are included from more than 90% of total patients. As a result of high frequency of medical treatment in Western medicine or Korean medicine is "administration of Korean medicine", which is same as before and within the pilot project. The ratio of utilizing both Western and Korean medical care for the same disease on the same day by both general patients and patients in KCD-7 disease code group C, G, I, M and S had been increased significantly. Conclusions : The pilot project might change the behavior of utilizing the medical care service by increasing the ratio of collaborative treatment of Western medicine and Korean medicine for the same disease on the same day.
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알코올 의존 노숙인의 회복지향적 재활시설 거주 경험 -노숙인 시설 비전트레이닝센터 운영의 특성과 이용인 회복 경험을 중심으로-
김현민 한국사회복지실천연구학회 2020 미래사회복지연구 Vol.11 No.3
본 연구의 목적은 노숙인 재활시설에서 생활하는 알코올 의존 입소자들의 회복경험과 회복패러다임을 지향하는 비전트레이닝센터의 구조적 특성이 입소자의 회복경험에 어떠한 영향을 주는지 탐색하는 것이다. 이를 위해 총 10명의 연구참여자들을 대상으로 한 달 간 심층면접을 한 후, 일반적 질적 연구방법을 통해 분석하였다. 연구 결과, 입소자들의 입소 이전에 알코올 의존 문제로 노숙에 상태에 이르기까지 삶에서 나타난 중요한 특징은 “‘의미가 상실’된 상태”였다는 것을 확인했다. 알코올 의존 노숙인들이 비전트레이닝센터에 입소한 후 변화의 핵심은 심각한 알코올 의존으로 인해 “상실되었던 의미들이 새롭게 구성”된다는 점이었다. 알코올 의존 노숙인들이 비전트레이닝센터에서 생활하면서 회복되는 영역들은 첫 번째는 시간 감각이었고, 두 번째는 활동, 세 번째는 연결된 존재로의 회복이었다. 비전트레이닝센터는 이용인의 상실된 통제감을 다시 갖추는 회복의 공간으로서 작동하고 있었는데 이를 위한 시설운영의 핵심은 “통제의 축소, 책임의 확장”이었다. 관련하여 확인할 수 있는 센터 운영의 특징 두 가지는 첫째, 센터의 내부 규칙을 기관 종사자들과 이용인들이 함께 만들어 가는 공식적인 회의기구가 있다는 점, 두 번째는 시설 구성에서 공식적인 프로그램이 진행되는 시간 이외에는 이용인들이 자유롭게 시간을 사용할 수 있도록 하는 ‘여백’이 존재한다는 점이었다. 위의 연구결과를 토대로 알코올 의존 노숙인 재활시설의 운영방식과 시설 내 생활 질서 구성 방법에 대해 제언하였다.
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