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오금곤,조금배,박병강 조선대학교 동력자원연구소 1993 動力資源硏究所誌 Vol.15 No.1
PLC system is used for the purpose of decentralized control and allows data transmission between programable controllers to be easily performed by using an exclusive relay area. The programming language is important to operate the system. In this paper, it is used SFC(Sequence Function Cahrt) programming language to decrease the execution time with compare the ladder diagram program method. As a result, the SFC programming language process time is faster about 20∼30(%) than the ladder diagram programming.
한철웅,김종수,류평,오금곤,박세승 조선대학교 전자정보통신연구소 2000 電子情報通信硏究所論文誌 Vol.3 No.1
지능제어 기법중 하나인 퍼지-유전자 알고리즘은 매개변수 불확실성을 갖는 시스템을 제어하기 위한 새로운 제어 기법으로 사용되어지고 있다. 유전자 알고리즘에서, 돌연변이율은 국부적 최소화에 수렴하는 것을 방지하기 위하여 크게 설정하여야만 하지만, 전역 수렴 속도가 감소하는 문제점을 가지고 있다. 이러한 문제점을 개선하기 위하여 퍼지 논리와 유전자 알고리즘을 사용하여 제어기를 설계한다. 본 논문에서는 구륜이동 로봇의 목적궤적을 추적할 수 있는 제어기 설계를 제안한다. 제안된 제어기의 유용성은 모의실험을 통하여 보인다. Genetic algorithms, one of intelligent control methods, is used as new control approach to control the system including the parameter uncertainties In the genetic algorithm, the mutation rate must be set to high to prevent the convergence to local minimum, but it has the problem that the global convergence speed is decreased To enhance this problem, we design the controller by using the fuzzy logic and the genetic algorithm In this paper, we propose the controller design to track to the desired trajectory of the wheeled-mobile robot The validity of the proposed controller is showed through the simulation.
정모 두부 방사선 규격 사진을 이용한 안면 비대칭 환자의 분석
김일곤,이영미,오용덕,양희상,박금석,박관수,김중한,윤영주,김광원 朝鮮大學校 口腔生物學硏究所 1997 口腔生物學硏究 Vol.21 No.1
Since Broadbent, lateral cephalometric radiographs have been popularized as one of the most important diagnostic data. In case of asymmetric patients, however, lateral cephalometric radiographs can't give useful information because it just depends on sagittal and vertical analysis. While posteroanterior cephalometric radiographs can give useful information to us especially in case of vertical growth difference or lateral deviation and help making STO. Because appropriate diagnosis and treatment plan are very important in orthodontic treatment, clinician should pay more attention to use it for asymmetric patients.
최성곤(Sung Gon Choi),김영탁(Young Tak Kim),금민수(Min Su Geum),이양일(Yang Il Lee),권중구(Joong Gu Kwean),이창형(Chang Hyeong Lee),권영오(Young Oh Kweon),김성국(Sung Kook Kim),최용환(Young Hwan Choi),정준모(Joon Mo Chung) 대한소화기학회 1996 대한소화기학회지 Vol.28 No.3
The raw carp bile has been known as having both nephrotoxic and hepatotoxic effects which mechanisms are not well-known. Review of previously reported literature revealed many cases that had clinical evidences of both hepatitis and renal failure but any case of isolated hepatitis without acute renal failure was not found. We experienced a case of acute toxic hepatitis without evidence of renal failure due to ingestion of raw carp bile, so we report this case with review of literature. (Korean J Gastroenterol 1995;28: 421 - 425)
THE STARTING CHARACTERISTICS IMPROVEMENT OF SPIM WITH ONE-CHIP MICROCONTROLLER
Su-Kang Park,Nak-Il Choi,Geum-Bae Cho,Yang-Su Lim,Keum-Gon Oh,Hyung-Lae Baek 전력전자학회 1998 ICPE(ISPE)논문집 Vol.- No.-
A single phase induction motor (SPIM) rated in fractional horsepower is widely used in home and industrial equipment washing machines, fans, refrigerators, etc In this paper, authors present the experimental results of the SPIM under controlling of currents of main and auxiliary windings by using a one-chip micro starter (OMS) This new starting method is developed to replace the conventional starting device consisted with a mechanical switch and a capacitor. In mentioned method, the soft-starting of SPIM is simply implemented and higher efficiency is obtained in comparison with conventional condenser type SPIM.<br/>
Ozone Density Estimation and Stable Supply in the Thin Film Growth
Lim, Jung-Kwan,Park, Yong-Pil,Oh, Geum-Gon The Korean Institute of Electrical and Electronic 2001 Transactions on Electrical and Electronic Material Vol.2 No.2
An ozone condensation system is evaluated from the viewpoint of an ozone supplier for Bi-superconductor thin film growth. An ozone condenser by a selective adsorption on the silica gel surface is constructed. Ozone density is evaluated by three methods; ultraviolet absorption, thermal decomposition and Q-mass analyzing methods. Thermal decomposition method is found to be available to the density evaluation from dilute to highly condensed ozone. The highest ozone density condensed by the adsorption method is evaluated to be 97 mol%.
백색 LED와 RGB 멀티칩 LED 조명장치의 특성 분석
정병호(Byeong-Ho Jeong),김남오(Nam-Oh Kim),김덕구(Deog-Goo Kim),오금곤(Geum-Gon Oh),조금배(Geum-Bae Cho),이강연(Kang-Yoen Lee) 한국조명·전기설비학회 2009 조명·전기설비학회논문지 Vol.23 No.12
LED조명장치는 자동차분야, 항공, 디스플레이, 전송장치 그리고 특수조명등의 응용장치로의 활용이 증가하고 있다. 일반적으로 고출력 RGB 멀티칩 LED는 표시용이나 경관조명용 또는 감성조명용으로 적용되고 백색 LED는 표시용 조명에서 최근 들어 일반조명용으로 적용되고 있으며, 고출력 백색 LED의 출시와 광효율의 증가는 이를 더욱 가속화하고 있다. 본 논문에서는 백색 LED와 RGB 멀티칩 LED 조명장치를 동일한 사양으로 제작하여 물리적, 전기적, 광학적 조명특성을 분석하여 향후 LED조명시스템의 제작에 정량적 데이터를 제공하고자 한다. 이를 위해 LED의 주요한 물리적 특성인 방열특성에 대한 성능분석, 전기적 특성의 분석을 위한 전력 및 드라이브 효율에 대한 성능분석을 수행하였고 조명특성을 위한 연색성, 배광특성, 광효율을 측정하였다. 백색 LED와 RGB 멀티칩 LED 조명장치를 활용한 응용장치의 적용방법을 확립하고 나아가 다양한 조명시스템에 LED 조명장치를 적용하는데 참고가 되는 기초 데이터를 제시하고자 한다. LEDs are increasingly used for many applications including automotive, aviation, display, transportation and special lighting applications. Generally, the RGB multichip LED luminaire applied to signboard, emotional lighting system and display device and the white LED luminaire applied to general lighting system. white LED spectra for general lighting should be designed for high luminous efficacy as well as good color rendering. This paper describes characteristics of LED luminaire white LED and RGB multichip LED. Two type of LED luminaire prototype used experiment physical, electrical and optic test and performance analyzed. RGB multi-chip and phosphor-type white LED luminaire were analyzed by experiment on their color characteristics and luminous efficacy of radiation, distribution curve, and electrical characteristics. Research work is in progress to develop an improved performance for optic and electrical works well for two type of LED luminaires.