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비구면렌즈 설계를 위한 칼코게나이드 Ge-Sb-Se 광학계 및 결정화 특성 연구
명태식,고준빈,Myung, Tae Sik,Ko, Jun Bin 한국재료학회 2016 한국재료학회지 Vol.26 No.11
The recent development of electro-optic devices and anticorrosion media has led to the necessity to investigate infrared optical systems with solid-solid interfaces of materials that often have the characteristic of amorphousness. One of the most promising classes of materials for those purposes seems to be the chalcogenide glasses. Chalcogenide glasses, based on the Ge-Sb-Se system, have drawn a great deal of attention because of their use in preparing optical lenses and transparent fibers in the range of 3~12 um. In this study, amorphous Ge-Sb-Se chalcogenide for application in an infrared optical product design and manufacture was prepared by a standard melt-quenching technique. The results of the structural, optical and surface roughness analysis of high purity Ge-Sb-Se chalcogenide glasses are reported after various annealing processes.
자동차 실내 열쾌적성 개선을 위한 통풍시트의 쾌적온도 분석
인충교 ( Chung-kyo In ),곽승현 ( Seung-hyun Kwak ),김창훈 ( Chang-hoon Kim ),김규범 ( Kyu-beom Kim ),조형석 ( Hyung-seok Jo ),서상혁 ( Sang-hyeok Seo ),명태식 ( Tae-sik Myung ),민병찬 ( Byung-chan Min ) 한국감성과학회 2020 감성과학 Vol.23 No.4
자동차 고급화 추세에 따라 소비자의 차량 실내 환경에 대한 관심이 증가함에 따라 자동차의 기본적 성능뿐만 아니라 실내 쾌적성 향상에 관심이 증대되고 있다. 또한 자동차 실내 쾌적성에 대한 연구는 운전자에게 만족을 제공하는데 그치지 않고, 운전자의 불쾌지수 및 스트레스를 낮추어서 교통사고의 위험을 줄이는데 기여할 수 있기 때문에 매우 중요한 연구 주제이다. 따라서 본 연구에서는 운전자의 뇌파측정을 통해 통풍시트의 온도변화에 따른 쾌적감 변화와 쾌적온도를 알아보고, 온도변화에 따른 남녀간 쾌적감에 대한 차이를 탐색하고자 하였다. 연구결과 첫째 통풍시트의 온도가 22℃, 25℃, 28℃에서 각각의 실험군을 비교한 결과 28℃보다 25℃에서 통계적으로 유의하게 쾌적감이 더 높게 나타났다. 둘째 통풍시트 온도 변화에 따른 남녀간 쾌적감에 대한 실험결과 남성과 여성이 온도에 따라 느끼는 쾌적감은 통계적으로 유의한 차가 없는 것으로 나타났다. 향후 자동차의 실내온도와 통풍시트의 온도 변화에 따른 운전자의 쾌적감 변화를 파악하여 상관관계를 분석한다면, 운전자의 쾌적성을 확보하여 휴먼에러로 인한 교통사고를 낮출수 있을 뿐만 아니라 자동차의 전기에너지의 사용량을 줄일 수 있을 것이다. As the number of automobile registrations increases and luxury expectations grow, consumers are increasingly interested in indoor environment of vehicles. Therefore, manufacturers have an increasing interest in improving the indoor comfort as well as automobile performance. Research on indoor automobile comfort can help manufacturers increase driver satisfaction and reduce driver stress and discomfort, thereby reducing the risk of traffic accidents. Using electroencephalogram (EEG) measurements, we investigated the change in comfort and comfortable temperature according to the ventilating seat temperature change for both men and women. Results showed that the sensation of comfort was statistically significantly higher at 25°C than at 28°C. Secondly, there was no statistically significant difference in temperature-based comfort feeling between male and female subjects. In the future, if the correlation between the driver's comfort feeling and the change in ventilating seat temperature is analyzed, it is possible to reduce traffic accidents caused by human error and reduce the electric energy consumption of the automobile.
경계 표현 기반 솔리드 모델링 시스템 개발에 관한 연구
명태식,오익수 한밭대학교 산업과학기술연구소 1995 논문집 Vol.3 No.-
Geometric modeling system is a fundamental module in the CAD/CAM system. Solid model that has the richest data of the other modeling schemes can be applied to many application field. Solid model represents complete geometric and topological information. Boundary representation scheme is appropriate for a PC level solid modeling system. This study develops the boundary representation based PC level solid modeling system. We implemented the Boolean set operation between two solids for providing powerful CSG like input facility. One of the system characteristics is that uses NURBS information for modeling solid part with partially free from surface.
3차원 자유곡면 모델링 및 NC 가공데이타 생성에 관한 연구
明台植,金泰圭 大田産業大學校 1995 한밭대학교 논문집 Vol.12 No.0201
Machine design has been influenced heavily by the CAD technology, and similarly manufacturing has undergone major changes with the intorduction of numerically controlled(NC) machine tools. Integration of CAD and CAM is a important aspects manufacturing automation. This study has been conducted to develope the CAD/CAM system for the automatic generation of part program from geometric model of machine parts automatically. The results obtained from the study are as follows : 1. The CAD system which can process graphic procedure from the geometric data of sculpture surface developed with PC. 2. The main program for the CAM was developed. This progrom can procedure gemetric model data from Auto CAD data file. 3. The main program can control a surface with control point, and can procedure CL data from surface data, and can generate NC cord from CL data.
明台植,金泰圭,高準彬 大田産業大學校 1996 한밭대학교 논문집 Vol.13 No.1
This study is a system development of CMP (Computer Management Program) that concurrently take care of related task, referencing geometry information that engineer designed a model digital geometry information and that constructs a integrated database on apply at each other group in concurrent engineering environment. This study laid emphasis on a concept of CE(Concurrent Engineering) and can be can out related task seeing designed geometry model. It can be certification that development system is very useful to introduce a concept of CE.
명태식,오익수 한밭대학교 산업과학기술연구소 1997 논문집 Vol.4 No.-
Three-dimensional surface modeling and manufacturing techniques play an important role in the design and manufacturing automobile panels. NC method leads to high quality and accuracy in the manufacturing the metal mold of the automobile panel. To adopt NC method, the system may generate not only fairing surface with free form but also tool path for the free form surface. In this study, an expert system is developed so that can be used in the design and manufacturing the metal mold of the automobile body panel.