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조성은(Jo, Sung-Eun),차경환(Cha, Kyung-Whan) 한국초등영어교육학회 2014 초등영어교육 Vol.20 No.1
The purpose of this study is to investigate the attitude change toward elementary school English classes. This study consisted of seventeen third-grade students and fifteen of their parents. They were interviewed twice within the course of this study; the first time prior to the semester and the second time during the semester. Results showed that expectations regarding the class level increased between the interviews, respectively. The majority of the students were satisfied with their elementary school English classes. Most of the parents were satisfied with the English class hours while the expectation with the class level decreased between first and second interviews. There is a significant difference in the cognition of students and parents. Students interest level highly increased in their elementary school English classes, while parents have decreased expectations for the aforementioned. The findings of this study suggest that elementary school English classes need to enhance in quality.
정전용량 변화 방식의 DPF 진단용 입자상 물질 검침 센서
조성은(Sung-Eun Jo),고양주(Yang-Joo Ko),김정택(Jung-Taek Kim),이대건(Tae-Kwan Yi),박헌준(Heon-Joon Park),심동훈(Dong-Hoon Sim) 한국자동차공학회 2016 한국자동차공학회 학술대회 및 전시회 Vol.2016 No.11
This paper proposes a capacitive particulate matter(PM) sensor, which is a method for monitoring DPF(diesel particulate filter) leakage. The deposited particles on the sensor are burned off at elevated temperature by heating the sensor. In case of resistive PM sensors, output signals of the sensor are distorted severely by deposition of metallic particles on the sensor surface. The proposed capacitive sensor which has island sensing electrode structures, on the other hand, the influence of the deposited metallic particles on the sensor signals is decreased by capacitive sensing mechanism. The proposed sensor is fabricated on an alumina body and evaluated on a diesel engine. The sensor output signal is 150pF at specified PM concentration of 20mg/㎥. The output capacitance change of the sensor is 28pF in condition of severe contamination of the sensor surface by the metallic particles.
컴퓨터 비전을 이용한 위성의 랑데부 및 도킹 보조 시스템
조성은(Seong Eun Jo),강민성(Min Sung Kang) 한국항공우주학회 2017 한국항공우주학회 학술발표회 논문집 Vol.2017 No.4
본 논문에서는 위성 간 근접운용에서 도킹을 위한 자세파악의 한 방법으로 시각기반의 3D 매핑을 적용한 인공위성 도킹 보조시스템을 연구하였다. 위성의 가관측성 향상을 위해 디지털 영상을 분석함으로써 위성체간의 3차원 좌표를 획득하고 표적위성의 상대위치 및 자세를 추정하는 방안을 서술한다. 추적위성에 설치된 한 쌍의 영상장치를 통해 표적위성 표면의 세 개의 표점을 포함한 한 쌍의 영상을 촬영하고, 두 영상에 나타난 시차(視差)로부터 피사체의 상대위치를 추정하기 위한 기하학적 관계식을 유도하여 랑데부와 도킹을 위한 상대위치정보를 결정한다. 본 연구에서는 시차를 통해 표점의 좌표를 획득하는 방정식을 정리하고 단일표점 측정설비를 설치하여 영상분석을 통해 거리에 따른 표점좌표를 측정하였다. 또한 회전체의 정면에서 관찰되는 세 표점을 통해 회전체 원형을 파악할 수 있는지 확인하였다. This paper studied a docking assist system of satellite, using 3D-mapping based on vision as a method of attitude determination, Acquiring the three-dimensional coordinates between the satellites and estimating the relative location by analyzing digital images improves the observability of tracking satellite. The images include of multiple points on the surface of the target satellite. The images appear difference visual through each camera installed on the tracking satellite. And geometric relation for estimating the relative location of the object is derived from the parallax displayed on the two images. It determines relative position information for rendezvous and docking. This paper describes parallax analyzing with single point measuring equipment and simulation to determine the fixed solid from three points.
김성호(Sung-Ho Kim),이송은(Song-Eun Lee),오헌(Heon Oh),양정아(Jung-Ah Yang),정치영(Chi-Young Chung),장종식(Jong-Sik Jang),유영법(Young-Beob Yu),조성기(Sung-Kee Jo) 한국식품영양과학회 1999 한국식품영양과학회지 Vol.28 No.3
전통한방 처방 중 귀비탕 및 그 구성 약재의 방사선 방호효과를 평가하기 위하여 고선량, 중간선량 및 저선량의 방사선을 조사한 생쥐에서 소장움 생존, 비장내 조혈세포 집락형성, 소장움 세포의 apoptosis 유발을 관찰하였다. 방사선 조사 전 귀비탕의 투여는 생존 소장움 수를 증가시키고(p<0.005), 소장움 세포에서 apoptosis에 의한 세포사를 감소시켰다(p<0.05). 귀비탕의 구성 약재별 시험결과 당귀, 인삼, 산조인, 목향 및 복령이 주된 방사선 방호 효과를 보이는 것으로 나타났다. 이상의 결과는 귀비탕이 무독성 천연물로서 방사선방호 식품으로 활용될 수 있는 가능성을 제시하였으며, 작용기작 및 효능성분에 대한 연구가 계속되어야 할 것이다. In this study, we evaluated the radioprotective effects of Kuei-Pi-Tang and its ingredients, as a prescription of traditional Oriental medicine. The jejunal crypt survival, endogenous spleen colony formation, and apoptosis in jejunal crypt cells were investigated in mice irradiated with high and low dose of γ -rays. In the mice administered with Kuei-Pi-Tang extract before irradiation, the jejunal crypts were protected significantly(p<0.005) and the frequency of radiation-induced apoptosis was reduced(p<0.05). In the experiment on the effects of the ingredients of Kuei-Pi-Tang, the results indicated that the extract of Dangui(Angelica sinensis), Suanzaoren(Zizyphus valgaris), Rensan(Panax ginseng), Fuling(Poria cocos) and Muxiang(Saussurea lappa) might have a major radioprotective effect. Although the mechanisms of this inhibitory effect remain to be elucidated, these results indicated that Kuei-Pi-Tang might be a useful radioprotector, especially since it is a relatively nontoxic natural product.