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Methamphetamine 남용자에 있어서 혈청 아연농도에 관한 연구
문형일,이후락,이수일,Moon, Hyung-Il,Lee, Hoo-Rak,Lee, Soo-Il 대한예방의학회 1992 예방의학회지 Vol.25 No.2
The author investigated the zinc concentrations in sera of 110 methamphetaimine abusers (male 87, female 23) and of 41 healthy official workers(male 29, female 12) using inductively coupled plasma emission spectrometer. The serum zinc concentrations were analysed according to hepatitis C virus antibody(Anti HCV), hepatitis B surface antigen(HBsAg) and alanine aminotransferase(ALT) value in both groups. The analytical results were obtained as follows 1. The mean zinc concentration of MAP abuser group($298.5{\pm]246.9{\mu}g/100ml$) was 2.5 times higher than that of control group($118.8{\pm}25.4{\mu}g/100ml$). 2. The distributions of zinc concentration in both groups were skewed pattern. 3. The zinc concentrations were higher in Anti HCV-positive group and abnormal ALT value group than Anti HCV-negative group and normal ALT value group. But HBs-Ag positive group had lower zinc concentration than HBs-Ag negative group. 4. The number of anti HCV-positive subjects was increased and the zinc concentrations were decreasd in proportion to the abusing duration of MAP.
문형일(Hyung-il Moon),김헌영(Heon Young Kim) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
In design process of a rubber component, basically needed parameters are deformed shape, stiffness at the special direction, durability and etc. Those parameters can be easily predicted by using the finite element analysis. However, if mechanical characteristics of the rubber material could not sufficiently reflected in the analysis process, the results have low reliability. In this paper, it was presented that reliability can be increased by the Mullins effect and the planar test data, which are important mechanical characteristics of rubber. Also, to solve difficult analysis model, which have complex contact and boundary condition or many elements, the analysis method base on the explicit code was suggested instead of the normally implicit method. And fatigue life of rubber component was predicted using static analysis result and the tearing energy theory.
심금 종류에 따른 자동차용 도어 웨더스트립의 유한요소 모델링
문형일(Hyung-il Moon),주현승(Hyun-seung Joo),김도형(Do-hyung Kim),김헌영(Heon-young Kim) 한국자동차공학회 2009 한국자동차공학회 부문종합 학술대회 Vol.2009 No.4
Weatherstrips protect noise, dust, rain and wind out of the automobiles. There are various section shapes acoording to the usage. Most of computer simulation about the deformation of weatherstrip part has been conducted by using implicit code. But the analyses are restricted to simple shaped or 2 dimensional cross section of weatherstrip. In the case that the model is too huge and time complicated explicit code is much more effective in the aspect of accuracy and computational effort. Four types of finite element model are proposed in this study. In addition to, the reaction force and deformation patterns are compared between the simulation and the experiment.
문형일(Hyung-il Moon),김헌영(Heon Young Kim),최천(Cheon Choi),이인혁(In Heok Lee),김도형(Do Hyung Kim) 대한기계학회 2010 大韓機械學會論文集A Vol.34 No.11
파워 글라스 시스템의 특성은 주로 윈도우 레귤레이터의 거동 특성과 글라스 런에 의한 저항에 의해 결정되며, 시험 결과 분석을 통해 시스템의 성능을 예측한다. 본 논문에서는 시험적인 방법의 한계를 해결하기 위해, 익스플리시트 코드를 사용한 해석적 방법을 제안하였다. 해석 모델에 사용한 글라스 런은 무니-리블린 모델을 사용하여 모델링 하였고, 다양한 조건에서의 마찰 시험을 실시하여 마찰계수를 구하였다. 또한, 윈도우 레귤레이터 파트의 메커니즘은 패스트 벨트 시스템과 슬립 링요소를 사용하여 모델링 하였고, 상승 시 발생하는 전류와 하중과의 상관관계 분석을 통해 레귤레이션 메커니즘의 신뢰성을 검증하였고, 모터의 특성을 고려하여 신뢰성 있는 글라스 상승 시간을 예측하였다. The performance of power window system was decided by driving characteristics of the window regulator part and reaction by the glass run. The performance of power window system usually has been predicted by experimental methods. In this paper, an analytical method using the explicit code was suggested to overcome the limit of the experimental methods. The friction coefficient of glass run was obtained by the friction test at various conditions and the Mooney-Rivlin model was used. Also, a mechanism of window regulator consisted of the fast belt system and the slip ring elements. And, we conducted the analysis considering characteristic of a motor and obtained the lifting speed of automotive glass with high reliability.
문형일(Hyung-il Moon),김헌영(Heon Young Kim),최천(Cheon Choi),이인혁(In Heok Lee),김도형(Do Hyung Kim) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.4
파워 글라스 시스템의 특성은 주로 윈도우 레귤레이터의 거동 특성과 글라스 런에 의한 저항에 의해 결정되며, 주로 시험 결과 분석을 통해 시스템의 성능을 예측한다. 본 논문에서는 시험적인 방법의 한계를 해결하기 위해, 익스플리시트 코드를 사용한 해석적 방법을 제안하였다. 해석 모델에 사용한 글라스 런의 마찰 계수는 다양한 조건에서의 마찰 시험을 실시하여 구하였으며, 무니-리블린 모델을 사용하였다. 또한, 윈도우 레귤레이터 파트의 메카니즘은 패스트 벨트 시스템과 슬립 링 요소를 사용하여 모델링 하였고, 상승시 발생하는 전류와 하중과의 상관관계 분석을 통해 레귤레이션 메카니즘의 신뢰성을 검증하였고, 모터의 특성을 고려하여 신뢰성 있는 글라스 상승 시간을 예측하였다. The performance of power window system was decided by driving characteristics of the window regulator part and reaction by the glass run. The performance of power window system usually has been predicted by experimental methods. In this paper, analytical method using the explicit code was suggested to overcome the limit of the experimental methods. The friction coefficient of grass run was obtained by the friction test at various conditions and the Mooney-Rivlin model was used. Also, a mechanism of window regulator consisted with the fast belt system and the slip ring elements. And, we conducted the analysis considering characteristic of a motor and obtained the lifting speed of automotive glass with high reliability.
문형일(Hyung-il Moon),김현영(Heon Young Kim),박준철(Joon Chul Park),민병권(Byung-Kwon Min),오정석(Jeong Seok Oh),이성훈(Seung Hoon Lee) 한국자동차공학회 2009 한국자동차공학회 학술대회 및 전시회 Vol.2009 No.11
The automotive weather strip has functions for isolating of water, dust, noise and vibration from outside. To achieve good sealing performance, weather strip should be designed to have the high contact force and wide contact area. However, these design causes excessive permanent deformation of weather strip. The causes of permanent deformation is generally explained to be the chemical material detrioration and physical variation and cyclic loading, etc. This paper introduces a numerical method to predict the permanent deformation using the time dependent viscoelastic model which is represented by Prony series in ABAQUS. Uniaxial tension and creep tests were conducted to obtain the material data. And the lab. test for the permanent deformation was accelerated during shorter time, 300 hours. The permanent deformation of weather strip were successfully predicted under the different loading conditions and different section shapes using the suggested numerical process.