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폐자원(폐석회, 굴패각, 바닥재)을 이용한 토양 중화제 개발 연구
오승진,조미현,박찬오,정문호,이재영,Oh, SeungJin,Cho, Mihyeon,Park, Chan-O,Jung, Moon-Ho,Lee, Jai-Young 한국지하수토양환경학회 2012 지하수토양환경 Vol.17 No.6
Korea shows the soil pH is 5.8 ~ 6.2 by many factors including the geological structure and climate condition. There is known as the cause for soil acidification by weathering of the mineral, excessive use of the chemical fertilizer, and extensively diffused acid rain. The purpose of research is environmentally-friendly material neutralization technology development utilizing the waste resources against by acid soil. The experiment analyze the physico-chemical property of the acid soil and waste resource materials (waste lime, oyster shell, bottom ash). The Batch-Test was performed under 3 stage. As a result, the acid soil showed up acid soil about 3.19. And waste lime, oyster, bottom ash showed the alkalinity with 9.62, 10.08, 9.17. In case of 1 batch-test experimental result, waste lime and oyster shell, the alkalinity was shown over 7.5 and the good efficiency was showed, on the other hands, the bottom ash showed the pH 4 the neutralization efficiency which is low. waste resource materials to be applied to 2 steps was chosen as the waste lime except the bottom ash and oyster. In 2 step batch-test experiment, it was exposed to be the most appropriate in case of doing the combination ratio of the waste lime and oyster shell with 9 : 1. It was exposed to be efficient most in the effeciency and aspect of economical efficiency combination ratio of the soil and materials was 9.6 : 0.6 with 3 step batch-test experimental result.
Seongjun Choe,Dongmin Lee,Hansol Park,Mihyeon Oh,Hyeong-Kyu Jeon,Keeseon S. Eom 대한기생충학열대의학회 2014 The Korean Journal of Parasitology Vol.52 No.5
Surveys on helminthic fauna of the nutria, Myocastor coypus, have seldom been performed in the Republic of Korea. In the present study, we describe Strongyloides myopotami (Secernentea: Strongyloididae) recovered from the small intestine of feral nutrias. Total 10 adult nutrias were captured in a wetland area in Gimhae-si (City), Gyeongsangnam-do (Province) in April 2013. They were transported to our laboratory, euthanized with ether, and necropsied. About 1,300 nematode specimens were recovered from 10 nutrias, and some of them were morphologically observed by light and scanning electron microscopies. They were 3.7-4.7 (4.0±0.36) mm in length, 0.03-0.04 (0.033) mm in width. The worm dimension and other morphological characters, including prominent lips of the vulva, blunted conical tail, straight type of the ovary, and 8-chambered stoma, were all consistent with S. myopotami. This nematode fauna is reported for the first time in Korea.
기덕종(Dockjong Ki),오성환(Sunghwan Oh),이미현(Mihyeon Lee),김지현(Jihyun Kim) 한국추진공학회 2013 한국추진공학회 학술대회논문집 Vol.2013 No.5
고고도에서 저속으로 비행하는 가스터빈엔진의 운용성 확인을 위해 압력 환경만을 모사하는 기존 시험설비에 온도모사를 위한 장치와 소형엔진 시험에 적합하도록 일부 장치를 추가하여 저속비행용 공기흡입식 엔진 고도시험장치를 개발하였다. 성능자료가 확보된 기존엔진의 비교시험을 통해 시험장치의 신뢰도를 확보하였고 45,000ft 고도까지 시험이 가능함을 확인하였다. An altitude engine test facility(AETF) for low speed flight air breathing engine was developed by adding temperature simulation system and some other subsystems necessary for small engine test to the existing test facility, which can simulate altitude pressure only. The reliability of the test facility was validated by testing an engine for which the performance is known. Capability of the test altitude was confirmed to be 45,000ft.