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- 저자 : 조현도 ( Hyun Do Jo ) (검색결과 4 건)
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초,중등정보S/W교육 : 데이터 로깅을 이용한 피지컬 컴퓨팅 기반의 과학적 사고를 위한 스팀교육
이승현 ( Seung Hyun Lee ),문종윤 ( Jong Yun Mun ),홍석경 ( Seokg Yeong Hong ),조현도 ( Hyun Do Jo ),장명호 ( Myung Ho Jang ),김희주 ( Hee Ju Kim ),유태묵 ( Tae Muk Lyoo ),김동정 ( Dong Jeong Kim ),유헌창 ( Heon Chang Yu ) 한국컴퓨터교육학회 2015 한국컴퓨터교육학회 학술발표대회논문집 Vol.19 No.1
최근 여러 상황에서 대응하고 대처할 수 있는 STEAM 교육이 활발하게 진행되고 있다. STEAM 교육은 학생들에게 과학에 대한 흥미, 창의성, 직관력, 예술적 감각의 향상에 영향을 주고 있지만 몇몇 실험 교육은 직접적으로 수행하기에는 비용적, 시간적으로 비효율적이다. 이와 같은 문제점들은 교육활동을 저해하는 큰 요인으로 작용된다. 학교현장에서 비용적인 부담이 적고, 교육활동 시간외에도 지속적인 활동을 할 수 있기 위해서 아두이노를 활용하여 실험을 수행하는 연구가 증가되고 있다. 아두이노를 통한 실험은 비용적 측면에서 뛰어나며 정밀한 데이터 수집가능 하다. 또한 다양한 센서들로부터 동시에 여러 가지 정보를 수집할 수 있다. 데이터 로깅을 통하여 아두이노로부터 발생된 다양한 데이터를 실시간으로 수집할 수 있으며, 이는 안드로이드에서도 가능하다. 이를 통하여 정해진 장소에서만 실험데이터를 수집하는 문제점에 대한 해결책을 찾을 수 있었다. 본 연구는 데이터 로깅을 이용한 피지컬 컴퓨팅의 교육적 효과를 알아보기 위해 아두이 노를 사용하여 안개의 포화도에 따른 빛의 세기, 온도, 습도를 측정하는 모듈에 대한 성능평가를 하였다.
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5,7-Dihydroxytryptamine의 세포독성에 의한 고양이 망막내 미세아교세포의 반응양상
주우현,남성안,조승묵,조현후,신민철,원무호,최창도,Joo, Woo-Hyun,Nam, Seong-Ahn,Jo, Seung-Mook,Cho, Hyon-Hoo,Shin, Min-Cheol,Won, Moo-Ho,Choi, Chang-Do 한국현미경학회 1998 Applied microscopy Vol.28 No.4
This study was designed to investigate the microglial reactions to the neurodegenerative changes in the cat retina. All experiments were performed using adult cats of both sex, weighing $2,500g\sim3,500g$. 5,7-DHT $(100{\mu}g)$ dissolved in 0.1% ascorbic acid was injected into the vitreous body. All injections were performed in one-side eye; the other side served as the control, which was injected only with 0.1% ascorbic acid. Cats were sacrificed at 1, 3, 7, 14 and 21 days after intravitreal injection of 5,7-DHT For light microscopy, retinae were fixed with 4% paraformaldehyde and processed using NDPase histochemistry. Same retinae were fixed with 1% para(formaldehyde-2.5% glutaraldehyde and processed for electron microscopy. NDPase-positive microglial cells were mainly distributed in the inner plexiform layer of the retina, and characterized by a small somata with a few slender processes, which were also extended in the ganglion cell layer (GCL) and inner nuclear layer (INL). The intensity of the microglia stained for NDPase was abruptly increased at 7 day as compared with that of the control, and thereafter continuously sustained until 21 day, the last experimental group in this study. Under the electron microscopical observation, microglial cells in the control group exhibited elongate nucleus with perinuclear chromatin condensation, and the perikaryon was scanty. However, a few hypertrophic glial cells were frequently found at 3 days after the drug injection. By 7 day, most microglial cells directed toward the degenerated neurons in the GCL, and the number of microglial cells was slightly increased as compared with the former group. At the 14 day, most microglial cells wrapped the degenerated cells in the GCL, and a few cells showed phagocytotic features. By 21 day, most microglial cells were engaged in phagocytotic activity, and their cytoplasm was filled with the phagorytosed material. Based on the results, 5,7-DHT may act as a specific neurotoxin to the cat retina, and microglial reactions to the neuronal death are already induced in early experimental stage. These results indicate that the microglial cells in the cat retina show characteristic features as a protective effect of neural tissue.
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손영건(Yeong-Geon Son),도경택(Gyeong-Tack Do),추성훈(Sung-Hoon Choo),조현식(Hyun-Sik Jo),이지은(Ji-Eun Lee),배인수(In-Su Bae),김성열(Sung-Yul Kim) 대한전기학회 2022 전기학회논문지 P Vol.71 No.2
Carbon neutrality, which has emerged significantly in recent years, has reduced coal-fired power plants worldwide and the proportion of renewable energy sources is increasing. Currently, the mandatory RES supply ratio based on the Renewable Portfolio Standard(RPS) system has been revised from 10% to 12.5% as of 2022, and the goal of reducing greenhouse gases by more than 40% compared to 2018 by 2030 by raising the Nationally Determined Contributions(NDC) through the 2021 United Nations Climate Change Conference (COP26). According to this policy, the proportion of renewable energy sources in Korea will increase further, but as a power source that cannot be controlled causes a problem in the supply and demand balance of a power load, the expansion of stable renewable energy sources using green hydrogen is in the spotlight. Green hydrogen is produced through water electrolysis technology that stores hydrogen generated by electrolysis of water and discharges oxygen into the atmosphere. This paper could consider the finite amount of water required to use the water electrolysis technology and derives a water electrolysis connection method based on a small hydropower source whose power is relatively stabilized among renewable energy sources. In this paper, it is classified from the perspective of water electrolysis facilities to the energy perspective linked to water electrolysis, and the method of linking water electrolysis based on a small amount of power is analyzed.
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박찬성 ( Chan Sung Park ),이순정 ( Soon Jung Lee ),도기원 ( Gi Won Do ),오쌍용 ( Ssang Yong Oh ),조현 ( Hyun Cho ),김민수 ( Min Su Kim ),홍일기 ( Il Ki Hong ),방성조 ( Sung Jo Bang ),제갈양진 ( Yang Jin Jegal ),안종준 ( Jong Joon 대한결핵 및 호흡기학회 2008 Tuberculosis and Respiratory Diseases Vol.65 No.2
Cholethorax (bilious pleural effusion) is an extravasation of bile into the thoracic cavity via a pleurobiliary fistula (and also a bronchobiliary fistula). It is an extremely rare complication of thoraco-abdominal injuries. It can be caused by congenital anomaly and also by hepatobiliary trauma, severe infection or iatrogenic procedures. The definitive diagnosis is made with aspiration of bilious fluid from the pleural space during thoracentesis, by finding a fistulous tract during endoscopic retrograde cholangiopancreatography (ERCP) or cholagioscopy, or with finding an abnormal pleural accumulation of radioisotope during hepatobiliary nuclear imaging. Its symptoms include coughing, fever, dyspnea and pleuritc chest pain. Herein we report on a case of cholethorax following performance of percutaneous transhepatic cholangioscopy (PTCS) to remove incidentally discovered common bile duct (CBD) stones. (Tuberc Respir Dis 2008;65:131-136)
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