고배속 CD-ROM Drive의 진동댐퍼 설계에 관한 연구

장승환,김현석,최진경,이대길,Chang, Seung-Hwan,Kim, Hyeon-Seok,Choi, Jin-Gyeong,Lee, Dae-Gil 대한기계학회 1998 大韓機械學會論文集A Vol.22 No.4

Rubber dampers are widely used to damp out vibrations generated in many mechanical elements because of the excellent damping characteristics of rubber. The damping characteristics of rubber is much dependent on temperature and frequency, which, in some cases, limit the effectiveness of rubber dampers. In this study, in order to increase the damping properties and axial and cross stiffnesses of rubber vibration dampers which are used in recording and regenerating devices, solid cores were inserted with interference tolerance in the rubber dampers. The damping characteristics of the rubber dampers with cores were investigated by experimentally and numerically using finite element method with respect to the interference tolerance, the core roughness, the materials of the core and the environmental temperature. From the experimental and theoretical investigations, it was found that the core in the rubber increased both the damping and stiffness of the damper. Also, it was found that the damping and stiffness of the rubber damper were much dependent on the temperature and frequency. Using the results of the experimental and theoretical investigations, the optimum design method for the cored rubber damper for recording and regenerating devices was developed.

DIY 가구체험을 통한 감성사회인의 감성적 효용성 평가

이태경 ( Lee Tai-kyoung ),최진경 ( Choi Jin-gyeong ) 한국디자인트렌드학회 2014 한국디자인포럼 Vol.43 No.-

감성사회는 전(前) 사회에 반해 구성원들의 감성적 가치를 중요시하는 사회이며, 남들과 차별화된 나만의 `가치`를 성취할 수 있게 만들어 주는 자아실현의 장(場)이다. 감성사회 구성원들은 자신들의 일상 생활영역에서 유희적인 감성적 가치를 바탕으로 `나를 위한 이야기`를 소비하면서 나만의 `삶의 가치` , `삶의 의미`를 소유하고 향유하고자 노력하고 있다. 사회 활동 중 자신의 의지와 상관없이 정신적 스트레스를 받는 감성사회인들은 치유의 방법으로 육체적 노동인 `온몸노동`이 필요하다. `정신노동`에 지친 몸과 마음을 제대로 된 `육체적 노동`으로 치유할 수 있기 때문이다. 그중 연구자는 DIY와 DIY 가구 만들기 체험을 통해 감성사회인이 바라는 일상 속 `행복`한 삶의 가치연구를 살펴보고자 한다. 본 연구는 감성사회인이 취미 소비활동을 통해 추구할 수 있는 다양한 감성만족과 자아실현 감을 통한 자아 효능감 성취 등을 연구하기 위하여 먼저, 대한민국에서 DIY 가구체험이 감성사회 여가 문화의 중심 경향으로 성장할 수 있고, 나만을 위한 생산적이며 가치적인 소비가 될 수 있는 감성적 효용성 요건으로 놀이와 재미, 의미, 자발성, 절약의 의미를 검토하였다. 또한, 연구자가 직접 취미 생들과 함께 DIY 가구체험을 진행한 후 DIY 가구체험 사례를 분석 연구하였다. 이를 통해 연구자가 입증하고자 하는 감성사회인의 DIY 가구체험에 따른 감성적 효용성에 대한 연구를 진행하였다. 그 결과 DIY 가구체험자들은 체험을 통해 생산적 소비, 소속감, 성취감, 절약, 자아실현 감 등의 감성적 효용성을 체감하는 것으로 연구되었다. DIY 가구체험은 기본적으로 인간 본연의 욕구를 충족시켜주면서도, 차별벅인 가치 체험을 통해 자기만족도 성취를 가능하게 해주는 의도적(意圖的)이며 의식적(意識的)인 창조적 소비활동이다. DIY 가구체험은 창조적 생산의 즐거움을 지속해서 누릴 수 있는 `정신적 가치 공간(Mental Value Place)`이다. An emotional society is one where the emotional values of members of the society are considered important and a field of self-realization through which the differentiated values of each can be achieved. Members of an emotional society consume `stories for themselves` based on amusing emotional values in their everyday lives to create `their own value and meaning in life`. Emotional social people who have mental stress caused by social activities regardless of their own intent require physical labor for therapy. A body and mind tired of mental labor can be treated through physical labor. Therefore, this study aims to speculate on the values of a happy experience in everyday life that emotional social beings pursue through DIY and in a DIY furniture experience. To look at the achievements of self-efficacy through diverse emotional satisfaction and the self-realization of emotional social beings, this study examined the following: First, as an emotional condition where a DIY furniture experience can be the main trend of a leisure culture in an emotional society and where members can have productive and valuable consumption for themselves. Also the fun, meaning, spontaneity and economy of the program were looked at. For this purpose, the author participated in a DIY experience program with those who had DIY furniture making as a hobby and analysed different cases of the experience. Then, this study analysed the emotional value of the furniture making experience for the subjects. As a result, it was discovered that subjects who participated in the DIY furniture making experience received emotional value such as a sense of production and consumption, belonging and achievement, and self-realization through the program. It is certain that the DIY furniture making experience can satisfy native human needs. In addition, it is a valuable consumptive activity as well as being an intentional and conscious creative activity. The DIY furniture making experience is a place of mental value where we can enjoy the pleasures of creative production.

특수가스(SiH₄/NF₃/N₂)의 가연성도표 활용

박상무(Sang-Moo Park),홍지은(Ji-Eun Hong),최진경(Jin-Gyeong Choi),신기루(Gi-Roo Shin),조명훈(Myeong-Hun Cho),이재성(Jaesung Lee),김영수(Young-Soo Kim) 한국가스학회 2014 한국가스학회 학술대회논문집 Vol.2014 No.11

참깨에 對한 Ethephon 및 Choline Salt of Maleic Hydrazide(CMH) 處理가 主要形質에 미치는 影響

崔鎭景,金容在 全南大學校 農漁村開發硏究所 1991 農業科學技術硏究 Vol.26 No.-

This study was conducted to improve the percentage of rippeness and increase the yield by elimination of ineffective capsules and withering of growing poiont with spraying the proper concentration of the Ethephon and the CMH at a suitable application time during late growth stage of sesame. The sesame which was used experiment was Danbaek sesame. The Ethephon and the CMH were treated with 250, 500, 1000 and 2500 ppm, and 1000, 2500, 5000 and 10000 ppm on 20, 25, 30, 35 days after flowering time respectively. 1. The stem length was regulated by the two regulators. The effect of Ethephon at early growth stage was higher than at late growth stage. 2. At least, minimum capsules per plant were obtained when the Ethephon and the CMH were applied to below 250 ppm and 5000 ppm on 30 days after flowering time respectively. 3. The percentage of rippeness inferred which was improved by treatment the Ethephon on 25 to 30 days after flowering time. The CMH was increased the percentage of rippeness at all treatment except 10000 ppm. If it were considerated the percentage of rippeness and side capsule, it would moderate applying 250 ppm on 30 days after flowering time. The effects of CMH were higher than those of ethephon. 4. Concentration of the Ethethon and the CMH which didn't lead to decreasing percentage of rippeness were 500 ppm and below 2500 ppm respectively. 5. When the Ethephon was applied to sesame plant, chlorophyl contents of sesame plant arrived to peak on 4 days after application. The other hand the CMH was decreased chlorophyl contents 33 to 48 percent. 6. The both growth regulators didn't affect on the emergency ratio of sesame, but the CMH was decreased 90 percent the emergency ratio of sesame when it was treated more than 20000 ppm. 7. Form finishing flower to maturing stage, the term was obtained by the both growth regulator was 19 to 22 days, 15 to 18 days, 9 to 13 day and 4 to 7 day treatment 20, 25, 30 and 35 days after flowering time respectively. For this period, assimilating products would move plant into grain. 8. Two regulators lead to decreasing no. of grains in capsules formed when those were applied to. 9. When the ethephon was treated on sesame, the percentage of rippeness was improved, but it was difficult to form full capsules per plant. Thus, it didn't expect to increase yield of sesame. While, when the CMH was treated with 2500 ppm on 30 days after flowering time. Because it was subject to obtaining full capsules per plant and was improved the percentage of rippeness. The yield of sesame would be increased 12% than that (85kg/ 10a) of control.