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RISS 인기검색어
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- 저자 : 최현길(Hyun Gil Choi) (검색결과 5 건)
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최현길(Hyun Gil Choi) 산업기술교육훈련학회 2018 산업기술연구논문지 (JITR) Vol.23 No.1
The conventional nutrient automatic feeder of the venturi type controls the target value by receiving the feedback through the sensor (EC or PH) by the control method in which the liquid is ejected by blowing air with ON / OFF time. however the nutrient solution can not be continuously injected and it is impossible to control the ratio of the nutrient supply reservoir by re-adjustment and if sensor (EC or PH) fails, nutrient supply is not possible and the concentration change is severe. By compensating for these disadvantages and changing to the improved high-pressure pump input method, a certain amount of nutrient solution was realized and accurate nutrient concentration control is possible by continuous control, and the amount of water can be adjusted by the nutrient supply tank control. The size of the equipment was reduced by reducing the number of parts, and it was made to be convenient to use at the same time as reducing the cost. And it was possible to control the concentration of the nutrient solution accurately by continuous control and to adjust the amount of water by the nutrient supply water tank ratio control. In addition, the sensor can be operated manually in case of sensor failure, and a certain amount of nutrient solution is supplied to the plant by the accurate concentration control of the continuous control, so that the plant that has been supplied with it can grow well. The fault monitoring function was added to this, so that the automatic control technology was popularized in agriculture and used conveniently.
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최현길 ( Hyun Gil Choi ),연규민 ( Gyu-min Yeon ) 대한소아감염학회 2016 Pediatric Infection and Vaccine Vol.23 No.3
길랭-바레 증후군은 약 3분의 2에서 선행 감염이 원인이 되며 면역반응 때문에 발병하는 것으로 알려져 있는데, 그 중 인플루엔자 바이러스는 비교적 드문 원인이다. 발병 기전과 관련된 항체들에 대한 보고들 은 몇 차례 있었지만 길랭-바레 증후군 환자의 뇌척수액에서 인플루엔자 바이러스가 직접 검출된 증례 는 없었다. 6세 여아가 내원 1주 전 인플루엔자 A로 진단된 후 oseltamivir를 복용하며 증상이 호전되었고, 내원 2일 전 두통 및 하루 전 양하지 위약감이 생겨서 응급실로 왔다. 신체 진찰, 뇌척수액 검사, 신경전도 검사, 척수 자기공명영상 등의 결과를 토대로 길랭-바래 증후군으로 진단하였고, 뇌척수액 중합효소 연쇄반응 검사에서 인플루엔자 A 바이러스가 검출되었으며, 면역글로불린 정맥 투여 후 점차 증 상이 호전되었다. 본 증례를 통하여 저자들은 인플루엔자 바이러스가 뇌척수액 내로 직접 침투한 것이 길 랭-바레 증후군의 발생과 연관이 있을 것이라고 판단하며, 향후 그 기전에 대한 연구가 필요하겠다. Guillain-Barre syndrome (GBS) is caused by antecedent infectious diseases in approximately two-thirds of cases. GBS is considered an autoimmune response. Among reported preceding infections, influenza virus is relatively rare. Several reports have identified antibodies related to GBS pathogenesis. However, no case report has described the detection of influenza virus in the cerebrospinal fluid (CSF) of a patient with GBS by polymerase chain reaction (PCR). Here we report the case of a 6-year-old girl who was diagnosed with influenza A 1 week prior and was treated with oseltamivir, after which she visited our hospital for headache and bilateral leg weakness that had persisted for 1 day. We diagnosed her with GBS based on physical and neurologic examination findings, CSF analysis, nerve conduction velocity test results, spinal magnetic resonance imaging, and detection of influenza A virus in her CSF by PCR. She was treated with intravenous immunoglobulin and her symptoms slowly improved. This case report suggests that GBS may be caused by influenza virus through penetration of the CSF.
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지능제어 신경망을 이용한 DC 서보 전동기의 위치제어 특성 및 성능연구
김종혁(Jong-Hyeok Kim),최현길(Hyun-Gil Choi),김도선(Do-Seon Kim) 산업기술교육훈련학회 2010 산업기술연구논문지 (JITR) Vol.15 No.2
Recent control techniques have been proposed in order to improved the control performance characteristics for automatically accurate control system. In the position control system using a DC servo motor as a driver, the response-characteristic of system is controlled by the PID controller. In this paper, for adjusting the error signal and the plant input using the intelligent control neural network. The coupling coefficients of each layers of neural network are automatically adjusted. We assume that a plant is liberals and derive the learning algorithm. The proposed controller apply to the position control system using DC servo motor as driving source and can verify usefulness of this method through the experiment.
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국내 청소년의 인플루엔자 예방접종률에 영향을 미치는 요인: 국민건강영양실태조사 4-6기 자료 분석
이지영 ( Ji Young Lee ),최현길 ( Hyun Gil Choi ),오지은 ( Chi Eun Oh ) 대한소아감염학회 2017 Pediatric Infection and Vaccine Vol.24 No.1
목적: 예방접종 정책과 프로그램 수립에 있어 청소년의 인플루엔자 백신접종률은 중요한 정보를 제공 한다. 본 연구는 국내 청소년의 인플루엔자 예방접종률을 파악하고 이에 영향을 미치는 요인을 파악하 고자 하였다. 방법: 2007년부터 2012년 그리고 2014년에 시행된 제4-6기 국민건강영양조사에 참여한 만 12-18 세 청소년 중 인플루엔자 백신 예방접종 여부에 유, 무를 응답한 5,213명을 대상으로 건강설문 자료를 활용하여 분석하였다. 결과: 연구 대상자의 인플루엔자 예방접종률은 23.2% (범위, 21.1%-24.7%)였다. 연구 대상자들 중, 초등학생인 경우(odds ratio [OR], 1.706; 95% confidence interval [CI], 1.526-1.906)와 주관적 건강 인식에서 건강 인식이 좋을수록(OR, 1.192; 95% CI, 1.057-1.344) 더 높은 접종률을 보였다. 음주를 하지 않고(OR, 1.769; 95% CI, 1.474-2.122) 흡연 경험이 없는 청소년(OR, 1.459; 95% CI, 1.144-1.860)에서 접종률이 높았고, 폐렴으로 의사에게 진단받은 경험이 있는 경우(OR, 1.469; 95% CI, 1.076-2.006) 접종을 많이 하는 것으로 확인되었다. 결론: 국내 청소년 중 예방접종률이 낮은 집단인 중, 고등학생과 주관적으로 건강상태가 나쁘다고 생각 하는 그룹 및 음주, 흡연을 하는 청소년들을 대상으로 한 적극적인 예방접종 홍보 정책이 요구된다. Purpose: Influenza vaccination coverage in adolescents is an important goal of informed vaccination policies and programs. This study aimed to estimate the influenza vaccination coverage rate and investigate the factors influencing influenza vaccination coverage in Korean adolescents. Methods: The study population consisted of 5,213 adolescents (aged 12 to 18 years) who participated in the Korea National Health and Nutrition Examination Survey from 2007 to 2014 (except for 2013). We analyzed influenza vaccination coverage in relation to the demographics, lifestyle, and medical characteristics of the participants. Results: The influenza vaccination coverage rate, during the study period, was 23.2% (range, 21.1% to 24.7%). Logistic regression analysis revealed that factors influencing influenza vaccination were elementary school age (odds ratio [OR], 1.706; 95% confidence interval [CI], 1.526 to 1.906), good self-rated health status (OR, 1.192; 95% CI, 1.057 to 1.344), a drinking status of non-drinker (OR, 1.769; 95% CI, 1.474 to 2.122), a smoking status of non-smoker (OR, 1.459; 95% CI, 1.144 to 1.860), and a past diagnosis of pneumonia (OR, 1.469; 95% CI, 1.076 to 2.006). Conclusions: Influenza vaccination coverage in Korean adolescents is relatively low. Special efforts are needed to increase vaccination coverage for adolescent groups with low vaccination rates including adolescent smokers and drinkers, middle and high school age adolescents, and adolescents with a poor self-rated health status.
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