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박기철(Ki Chul Park),김동선(Dong Sun Kim),김익훈(Ik Hoon Kim),육지헌(Ji Heon Yook) 한국자동차공학회 2012 한국자동차공학회 학술대회 및 전시회 Vol.2012 No.11
The exhaust muffler, one of the important parts in the vehicle, is the essential device to reduce engine-induced noise. But it is very difficult to achieve listenable exhaust sound and it takes much time to tune inner structures of mufflers. In order to achieve harmonious exhaust sound quality, it is necessary to comprehend the sound characteristics of various inner structures (tube length, baffle location, etc) inside mufflers. So, this study proposes muffler tuning kit as a practical new method possible to reduce tuning time and test sample numbers. First, we select muffler outer shape and volume as a original base muffler. Second, we design detail components of muffler(case, end plate-front/rear, tubes-inlet/middle/outlet and baffles). The tuning kit is designed to be possible to assemble, dissemble and change any components of different dimensions. Third we make tuning kit based on the preliminary detail design and compared exhaust noise in the engine bench with the original base muffler sample for NVH correlation. As a result, exhaust noise of tuning kit is well matched with that of original base muffler sample. So we are expecting the tuning kit to be used to reduce tuning time and test samples of mufflers when developing new vehicle.
정보통신혁명과 한국의 도시사회 : 지역정보화를 중심으로 Focused on the Regional Informationization
김익훈 건국대학교 1993 대학원 학술논문집 Vol.36 No.-
Nowadays the information and telecommunication rapidly progressing to the computer utilization bring so many changes to the entire field of economics and social life. The society of informationization already comes in front of us, and its influence already range over the entire field of politics, economy, society and culture. It also has influence upon the propulsion of regional development, and this is so-called regional development based upon regional informationization. Therefore the present paper discuss the present and a plan of effective propulsion for the regional informationization in Korea. In Korea, the problem of inter-regional differentials due to the economically oriented development policy becomes a difficult problem. To solve the inter-regional differentials, regional development based on regional informationization in needed. And to following items should be fulfilled at the regional level ; ⅰ)informationization appropriate for intra-regional enterprise activity and administration. ⅱ) informationization guaranteeing regional autonomy and self-regulation ⅲ)systems appropriate for the needs of regional inhabitants. As there is a growing importance of information and telecommunication, information becomes standard of social power. Nowadays the pertinent and rational choice and use of information are essential elements in enhancing people's quality of life and promoting national welfare. Therefore to guarantee the conditions that people in all places access to and use information equally is not only social responsibility but also supreme task in our society.