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김현근(Hyun-Gun Kim),김기복(Gi-Bok Kim),김태관(Tae-Kwan Kim) 한국산업융합학회 2015 한국산업융합학회 논문집 Vol.18 No.3
In this paper, we propose a new approach to design and control a smart gripper of robot system. A control method for flexible grasping a object in partially unknown environment was proposed, where a proximate sensor detecting the distance between the fingertip and object was used. Based on the proximate sensor signal the finger motion controller could plan the grasping process divided in three phases. The first step is scanning process which two first joints were moved to mid-position of the detected range by a state-variable feedback position controller, after the scanning was finished. The contact force of fingertip was then controlled using the detection sensor of the servo controller for finger joint control. The proposed grasping planning was tested on rectangular bar.
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ArduinoBT와 슬라이드 센서를 연동한 무선 다기능 IR-pen : 슬라이드 센서를 통한 다기능 IR-pen구현
김상년(Sang-nyeon Kim),김종현(Jong-hyun Kim),김현근(Hyeun-guen Kim),김미진(Mi-jin Kim),김현아(Hyeon-a Kim),이유성(Yu-sung Lee),라건주(Gun-ju Ra),정기철(Keechul Jung) 한국HCI학회 2012 한국HCI학회 학술대회 Vol.2012 No.1
본 논문에서는 Wii-Remote 방식의 터치스크린과 사용자 편의 제공을 위한 슬라이드 센서 기반의 IR-remote를 제안한다. 기존의 Wii-Remote 기반의 IR-pen은 터치 기능만을 제공하기 때문에 Wii-mote를 보다 유연하게 사용 할 수 없었다. 이에 우리는 Arduino를 기반으로 작동하는 슬라이드 센서를 추가하여 다기능 IR-pen을 구현하고자 한다. 결과적으로 본 논문에서는 Arduino BT와 slide sensor를 연동하여 추가한 IR-pen을 통해 확대 및 축소, 음향조절, 스크롤 바 등 마우스의 휠 기능을 제공함으로써 flexible한 IR-remote를 구현한다. In this paper, we propose Wii-Remote and Touch features by IR-remote based on slide sensor for convenience of user. In former days, we could'nt be used flexibly Wii-mote because past IR-pen offer only touch function. We suppose IR-pen having many function by adding slide sensor. Consequently, in this paper, we implement flexible IR-remote added Arduino BT and slide sensor by offering wheel function of mouse(zoom in/out, voluming, scroll bar, etc).
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정재호(Jung Jae Ho),김현근(Kim Hyun Gun),김향희(Kim Hyang He),전태보(Jeon Tae Bo) 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.1
Simulation analysis for an auto body manufacturing system has been performed in this study. The major goal is to figure out the condition yielding the production rate, 70 per hour. It is, however, very difficult to maintain this rate due to inherent system factors such as machine failure rates, machine repair rates, number of carriers between manufacturing lines(shops), carrier speed etc. We first carefully examined the system and developed a simulation model using ARENA. We then applied statistical experimental design concepts for performance analysis. Our results indicate that the buffer size of 30 and quick repair of failed robots are required for the desired production rate. Other factors, on the other hand, are seen to have minor effects on the throughput. The approach taken in this study and the results obtained may provide a practical guideline for performance analysis and thus be applied without trepidation for similar cases.
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건축물의 친환경 인증여부에 따라 주거환경 만족도에 영향을 미치는 계획요소 비교연구
양승우(Yang, Seung-Woo),김현근(Kim, Hyun-Gun) 한국도시설계학회 2013 도시설계 : 한국도시설계학회지 Vol.14 No.4
본 연구는 친환경 인증단지와 비인증 단지의 주거환경 만족도를 비교·분석하고, 친환경 인증단지의 주거만족도에 영향을 미치는 요인을 분석하였다. 연구대상지로 경기도 남양주시 진접지구의 4개 단지를 선정하여 분석한 결과 다음과 같은 세 가지 결론에 도달하였다. 첫째, 친환경인증 단지와 비인증 단지의 주거만족도를 비교·분석한 결과, 친환경 인증 항목의 차이가 주요한 역할을 한 것으로 분석되었다. 둘째, 친환경 인증 단지의 주거만족도에 영향을 미치는 요소를 밝히기 위하여 12개의 친환경 인증 요소만을 독립변수로 하여 회귀분석한 결과 통계적으로 유의하지 않았다. 셋째, 친환경 인증단지의 만족도에 영향을 주는 구체적 항목을 도출하기 위하여 회귀분석을 실시하였다. 녹지환경 관리, 에너지 효율, 분리수거, 실내온도, 그리고 보행도로에 대한 만족도 등 친환경 인증 항목 5개와 비인증 항목으로 CCTV, 난방/관리비에 대한 만족도 2개가 통계적으로 유의함을 밝혔다. This paper aims at comparing Residential Environment Satisfaction(RES) between Environmentally Friendly Certified(EFC) site and non-certified(NEFC) site, and identifying the influence factors on the RES of EFC site through the regression analysis and factor analysis. Four sites in Namyangju-si new town were selected as case study at Jinjeop district, and findings were as followings. Firstly, RES of EFC site was statistically higher than that of NEFC site by ANOVA analysis with 38 variables. Secondly, regression analysis with only 12 elements of EFC. They were not statistically significant to RES. So any other else elements would influence on the the RES of EFC site. Thirdly, regression analysis was done to identify influence variables on the RES of EFC site. Statistically significant variables were satisfaction degree of green environment management, energy efficiency, separate garbage collection, indoor temperature, pedestrian way, CCTV, and heating and maintenance cost. The former five variables were from variables of EFC elements, and the latter 2 variables were from NEFC elements.
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정재호,김현근,김향희,전태보 강원대학교 산업기술연구소 2000 産業技術硏究 Vol.20 No.A
Simulation analysis for an auto body manufacturing system has been performed in this study. The major goal is to figure out the condition yielding the production rate, 70 per hour. It is, however, very difficult to maintain this rate due to inherent system factors such as machine failure rates, machine repair rates, number of carriers between manufacturing lines(shops), carrier speed etc. We first carefully examined the system and developed a simulation model using ARENA. We then applied statistical experimental design concepts for performance analysis. Our results indicate that the buffer size of 30 and quick repair of failed robots are required for the desired production rate. Other factors, on the other hand, are seen to have minor effects on the throughput. The approach taken in this study and the results obtained may provide a practical guideline for performance analysis and thus be applied without trepidation for similar cases.
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휘수연광 (輝水鉛鑛) Pellet 의 산화배소 Kinetics 에 관하여
김준수,오재현,김현근 대한금속재료학회(대한금속학회) 1983 대한금속·재료학회지 Vol.21 No.6
Oxidation roasting of molybdenite pellets was carried out to study the effect of temperature and oxygen concentration on the oxidation rate. The effect of heat transfer between pellet and surroundings on the reaction rate was also studied by measuring the temperature of pellet during reaction. The result obtained in this experiments are as follows; 1) The effect of heat transfer on the reaction rate was significant at the beginning of the oxidation processes. 2) The temperature difference between pellet and surroundings was increased with increasing the reaction temperature and the oxygen concentration. And the larger the difference of the temperature, the more the effect of heat transfer on the reaction rate. 3) The activation energies calculated from these experimental conditions were of the order of 34㎉/㏖ and 11㎉/㏖ for the non-isothermal and isothermal periods, respectively. And the oxidation rate of the molybdenite was mainly depended on diffusion rate.
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