버섯재배사의 공기교반에 따른 유동해석

정원근 ( W. G. Jeong ),김태한 ( T. H. Kim ) 한국농업기계학회 2011 한국농업기계학회 학술발표논문집 Vol.16 No.2

젓가락에도 상처가 핀다

정원근 천년의시작 2004 (계간)시작 Vol.3 No.3

살구나무를 심는다

정원근 천년의시작 2004 (계간)시작 Vol.3 No.3

산에서 저수지를 만나다

정원근 천년의시작 2004 (계간)시작 Vol.3 No.3

Benzoxazolin-2-thione과 PAS의 Alkyl Ester과의 Mannich Base 합성 및 항균력에 관한 연구

정원근(Won Keun Chung),정상헌(Sang Hun Chung),정필근(Pil Keun Chung),윤원영(Won Yung Yoon),이남복(Nam Bok Lee) 대한약학회 1974 약학회지 Vol.18 No.4

Nine benzoxazolin-2-thione derivatives were synthesized as the potential antimicrobial substances. These compounds were tested for the antimicrobial activities using Staphylococcus aureus and Escherichia coli by way of tube dilution method. The three compounds of 1, II and VII inhibited the growth of S. aureus at the concentration of 1mcg/ml, and III, VI, VIII and IX exhibited considerable antimicrobial activities against S. aureus at the concentration of l0mcg/ml. As to the growth of E. Coli, VII VII and VIII inhibited at the concentration of 1mcg/ml. II,III and IV exhibited considerable antimicrobial activities against E. coli at the concentration of 10mcg/ml.

AGV용 배터리 통합 모니터링 시스템

정원근(Won-Geun Jeong) 한국조명·전기설비학회 2018 한국조명·전기설비학회 학술대회논문집 Vol.2018 No.5

에르릿히 복수암에 있어서 C¹⁴-초산염 대사

정원근(Chun, Won-Kun),이상돈(Rhee, Sang-Don) 대한생리학회 1970 대한생리학회지 Vol.4 No.2

Tissue homogenates of Ehrlich ascites tumor tissues and several normal tissue of mice were incubated separately in medium maintaining C¹⁴_acetate concentrations of 5, 10, 20, 30, 40, 50 and 60 mg%, in order to determine maximum oxidative rates of acetate. In every incubation experiments, respiratory CO₂ samples rapped by alkaline which was placed in the center well of the incubation blask were analyzed for total CO₂ Production rates and their radoactivies. The fractions of CO₂ from medium acetate to total CO₂ production rate were obtained with relative specific activities (RSA) which were calculated by ratio between specific activities (SA) of CO₂ and medium C¹⁴_acetate and CO₂ production rates from medium acetate were calculated from RSA and total CO₂ production rates. Maximum plateau values of oxidative rates described above were determined at incubation experiments of various concentrations of medium acetate and compared the oxidative rates of acetate of tumor with those of normal tissues such as kidney, brain and liver. Maximum plateau values of total CO₂ Production rates were obtained at acetate concentration of 20 mg% and represent 25.0±0.54 μM/hr/gm in the brain, 16.3±2.5 in the kidney, 9.1±1.78 in the liver and 11.5±3.2 μM/hr/gm in the ascites tuners. Substancial CO₂ yield was observed in the tumor tissues as in the normal tissues. On the other hand, plateau values of RSA were 25.7±1.04% in thee brain, 9.1±0.72% in the kidney, 2.5±0.73% in the liver and 0.51±0.12% in the tumor tissues. CO₂ yields from the medium acetate, were 4.19 in the kidney, 2.28 in the brain, 0.228 in the liter and 0.059 μM/hr/gm in the tumor tissue. These show wide range even in the normal tissue but remarkable decrease in the tumor tissue. This fact means that further oxidation of acetate was inhibited remarkably in the tumor tissue.

RTOS를 이용한 위폐검출 계수기의 구현

정원근,신태민,이건기 한국정보통신학회 2002 한국정보통신학회논문지 Vol.6 No.2

A banknote counter is a machine that automates counting the money in some agencies to treat much banknotes as well as general banking agencies. The banknote counter materialized in this paper is the machine that adds the function of banknote sorting, detecting plural banknote and detecting counterfeit banknote to an existing banknote counter. The technique of sensor signal processing are used for banknote sorting. The technique of sensor application and data processing are used for detecting counterfeit banknote. The technique of precision equipment design and microprocessor application are used for high speed count. Software improved in debugging and difficulties to link with additional hardware. It was materialized through effective control algorithm and real-time signal processing with C-language on the basis of RTOS(real-time operating system) Photodiode, its applications and a magnetic resistance sensor are used as a sensor device with regard to hardware cost -cutting and process velocity. PCF80C552-24 of Philips using Intel I8051 core is used as a control microprocessor. As the results so far achieved, counterfeit banknotes made by the use of a color duplicator and a color Printer, are distinguished from real banknotes through mixing an optical with a magnetic sensor. and, in case that there are some different banknotes while counting, it is prevented for them to be counted without discriminating from the same kind of banknotes in addition to the fu notion of banknote sorting. 본 논문에서 일반 지폐 계수기에 권종구분 기능과 복수장 검출기능 그리고 위조지폐판별기 능을 부가시킨 지폐계수기를 구현하였다 권종구분에는 센서 신호처리기술, 위조지폐 판별에는 센서응용기술 및 정보처리 기술을 사용하였고, 고속계수에는 정밀기구설계 기술과 마이크로프로센서 응용기술을 사용하였다. 소프트웨어는 RTOS를 기반으로 한 C 언어를 사용하여 효과적인 제어 알고리즘과 실시간으로 신호를 처리함으로 써 디버깅 및 추가 하드웨어와의 접목이 어려운 점을 개선하였다. 센서 디바이스로는 하드웨어 비용절감과 처리속도를 감안하여 포토다이오드와 포토다이오드 응용제품, 그리고 자기저항센서를 사용하였다. 마이크로 콘트롤러는 Intel I8051 코어를 사용한 필립스사의 PCF 80C552-24를 사용하였다. 실험 결과 컬러복사 및 컬러 프린트로 만든 위폐가 잘 구분되는 것을 확인하였으며, 계수 중 이권종이 있을 경우 구분해 냄으로써 다른 지폐가 섞여 계수 되는 것을 방지 할 수 있었다.

NDIR CO2센서를 이용한 자동차 실내환기 장치에 관한 연구

정원근(Jeong Won Geun),이한욱(Lee Han Uk),이상준(Lee Sang Jun),김주호(Kim Ju Ho),김광열(Kim Gwang Yeol),이건기(Lee Gun Ki) 한국통신학회 2010 한국통신학회 학술대회논문집 Vol.2010 No.2

Analysis of Air Circulation in Oyster Mushroom Farm

정원근,김태한,임학규 한국농업기계학회 2012 바이오시스템공학 Vol.37 No.2

Purpose: Oyster mushroom farm which could not meet optimum temperature range yields non-uniform sized, low quality products. Thus, this study, utilizing STAR CCM+, one of the computational fluid dynamics (CFD) programs, analyzed the impact of air circulation and temperature distribution. Methods: After we visited numerous mushroom farms, we measured the temperature at the discharge ports of heaters, fan capacity, and the locations of the air circulators in the farms. According to the data, most mushroom growers installed the heaters near the entrance and discharge ports of the heaters at the third growing bed on the same height as the heaters in the entrance. The temperature at the discharge port of heater was 26°C, and the fan capacity was 4,500 m3/hr. The air circulator was placed in the center of the mushroom farm 50cm above the ground, and its capacity of inlet port was 1,100 m3/hr and discharge port 1,600 m3/hr. The mushroom farm was insulated. Results: According to the analysis of the temperature distribution in the vertical plane of the entrance side, no air circulation causes the high temperature zone of 296~299K at the discharge port of the heater to take up 34% of area while the operation of air circulators causes it to occupy only 9%. This means that not using air circulators leads to a concentration of high temperature at the discharge port near the entrance. In addition, with the results of the analysis of the temperature distribution in the vertical planes of the center, no air circulation causes the temperature zone of 295~298K at the discharge port of the heater to take up 48% of area while the operation of air circulators causes it to occupy 80%. This shows that the high outlet port temperature disseminated to the center. Conclusions: After ninety minute operation of both heater and air circulator, the interior temperature became stabilized in the mushroom farm. Air circulation made the high temperature at the discharge port disseminate to the center and exit in the farm and equalize the temperature distribution.