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정민지,김천휘,Jeong, Min-Ji,Kim, Cheon-Hwi 한국천문학회 2012 天文學會報 Vol.37 No.2
Hoffmeister(1943)에 의해 변광성으로 발견된 V345 Cas (2MASS J23083986+5406545, ${\alpha}$(2000.0)=23h08m39.86s & ${\delta}(2000.0)=+54^{\circ}06^{\prime}54.6^{\prime\prime}$)는 B 필터에서 13.1~14.2의 광도 변화를 보이는 것으로 알려진 별이다. 우리는 레몬산 천문대(LOAO)에서 2007년과 2008년에 걸쳐 총 22일간 V345 Cas의 BVRI CCD 측광관측을 수행하여, 처음으로 V345 Cas의 년도 별 전체 광도곡선을 완성하였다. 우리의 관측 자료와 Super WASP에서 공개한 자료를 이용하여 각각 7개의 극심시각을 산출하였다. 우리가 결정한 극심시각을 포함하여 여러 문헌에서 수집한 총 68개의 극심시각을 이용하여 V345 Cas의 주기 분석을 수행하였다. 그 결과, V345 Cas의 궤도주기는 포물선 모양의 영년변화와 함께 약 30년의 규칙적인 변화를 겪고 있음을 발견하였다. 규칙적인 변화를 제3천체에 의한 광시간 효과로 가정하여 관측된 극심시각에 잘 맞는 광시간 궤도 해를 산출한 결과, 영년주기가 증가하는 경우와 감소하는 경우에 대해, 각각 29.0년과 39.7년 주기를 갖는 두 개의 광시간 궤도 해가 가능하다. 이러한 모호성을 해결하기 위해서 앞으로의 극심시각 관측이 중요하다. 2007년과 2008년 BVRI 광도곡선들은 부극심을 기준으로 좌우가 거의 대칭이며, 1년 사이에 특기할 만한 광도변화를 보이지 않았다. 우리는 이 광도곡선들을 Wilson-Devinney 쌍성 모델을 이용하여 분석하여, V345 Cas의 측광학적 해를 처음으로 산출하였다. 우리가 구한 해에 의하면, 약 88도의 궤도경사각에 두 성분별의 질량비가 약 0.5인 V345 Cas는 질량과 표면 온도가 큰 주성과 로쉬 로브를 채우고 있는 반성으로 구성된 준 분리형 식쌍성계이다.
원자층 증착법으로 증착된 MoO<sub>x</sub>를 적용한 전하 선택 접합의 이종 접합 태양전지
정민지,조영준,이선화,이준신,임경진,서정호,장효식,Jeong, Min Ji,Jo, Young Joon,Lee, Sun Hwa,Lee, Joon Shin,Im, Kyung Jin,Seo, Jeong Ho,Chang, Hyo Sik 한국재료학회 2019 한국재료학회지 Vol.29 No.5
Hole carrier selective MoOx film is obtained by atomic layer deposition(ALD) using molybdenum hexacarbonyl[$Mo(CO)_6$] as precursor and ozone($O_3$) oxidant. The growth rate is about 0.036 nm/cycle at 200 g/Nm of ozone concentration and the thickness of interfacial oxide is about 2 nm. The measured band gap and work function of the MoOx film grown by ALD are 3.25 eV and 8 eV, respectively. X-ray photoelectron spectroscopy(XPS) result shows that the $Mo^{6+}$ state is dominant in the MoOx thin film. In the case of ALD-MoOx grown on Si wafer, the ozone concentration does not affect the passivation performance in the as-deposited state. But, the implied open-circuit voltage increases from $576^{\circ}C$ to $620^{\circ}C$ at 250 g/Nm after post-deposition annealing at $350^{\circ}C$ in a forming gas ambient. Instead of using a p-type amorphous silicon layer, high work function MoOx films as hole selective contact are applied for heterojunction silicon solar cells and the best efficiency yet recorded (21 %) is obtained.
정민지,Seung Yeon Baik,Yourim Kim,Sungkean Kim,Dongil Min,Jeong-Youn Kim,Seunghee Won,이승환 대한정신약물학회 2020 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.18 No.3
Objective: While impaired facial expression recognition has been closely associated with reduced temporal lobe volume in patients with schizophrenia, this study aimed at examining whether empathy and social attribution affect such a relationship. Methods: A total of 43 patients with schizophrenia and 43 healthy controls underwent a facial expression recognition task (FERT) and magnetic resonance imaging. Basic empathy scale and the social attribution task-multiple choice were used to measure empathy and social attribution. Results: Patients with schizophrenia showed significant positive correlations between the total temporal lobe volume and the FERT-accuracy (FERT-ACC). Diminished temporal lobe volume predicted the impaired facial emotion recognition ability. Both empathy and social attribution played roles as moderators of the path from the left amygdala volume, left fusiform gyrus volume, both sides of the superior temporal gyrus volume, and left middle temporal gyrus volume to the FERT-ACC. In contrast, empathy alone functioned as a moderator between the right fusiform gyrus volume, right middle temporal gyrus volume, and FERT-ACC. No significant interaction was found for healthy controls. Conclusion: Our results suggest that social cognition remediation training on empathy and social attribution, could buffer the negative effects of small temporal lobe volume on interpersonal emotional communication in patients with schizophrenia.
정민지(Minji Jeong),김진용(Jinyong Kim),정창현(Changhyun Jeong),이영석(Youngseok Lee),정도현(Dohyun Jung) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
This paper is research about proactive safety and we have measured driver"s real time position of eye and head by using a camera settled in front of operator (driver) and a eye tracker equipment. Collected data were used to analyze a correlation between driver’s career and gender and its effect on driver’s behavior. Moreover, By calculating standard deviation figure (σ) of driver’s head behavior studied to represent how stable behavior depend on features driver has. This study results will be used to concrete an accident preventative education and be utilized as basic material for design system such as each different warning process following driver’s feature.
정민지 ( Min-ji Jeong ),양지윤 ( Jiyoon Yang ),최원실 ( Won-sil Choi ),김재우 ( Jae-woo Kim ),김석주 ( Seok Ju Kim ),박미진 ( Mi-jin Park ) 한국목재공학회 2017 목재공학 Vol.45 No.1
본 연구는 hydrodistillation 방법으로 추출한 새덕이 잎 정유의 화학적 조성과 항산화활성을 조사하였다. 새덕이 잎정유의 화학적 조성은 GC/MS로 분석하였다. 새덕이 잎 정유의 주요 구성성분은 cis-ocimene (11.00%), trans-ocimene(9.65%), elemol (9.15%), β-elemene (8.75%), germacrene-D (7.55%), trans-caryophyllene (5.90%), γ-elemene (5.40%), τ-muurolol (4.95%)인 것으로 나타났다. 새덕이 잎 정유의 항산화 활성은 총 페놀함량 분석, DPPH radical 소거활성, ABTS radical 소거활성, ferric reducing antioxidant power (FRAP) 분석을 통해 평가하였다. 정유의 총 페놀 함량은 136.7 ± 0.13 mg GAE/g으로 분석되었으며, 50% DPPH radical을 소거하는데 필요한 정유의 효과 농도(EC<sub>50</sub> value)는 639.33 μg/mℓ로 나타났다. 또한, ABTS radical 소거활성은 농도 의존적으로 나타났으며, FRAP value는 31.21 ± 0.12μM FeSO<sub>4</sub>·7H<sub>2</sub>O/g이었다. 이러한 결과는 새덕이 잎 정유가 건강에 대해 중요한 이점과 기능을 가질 수 있는 항산화활성을 가지고 있다는 것을 제안한다. This study aims to identify the chemical compositions and antioxidant activities of essential oil, extracted from the leaves of Neolitsea aciculata (Blume) Koidz by the hydrodistillation method. To the end, the chemical composition of N. aciculata leaf oil was firstly analyzed through GC/MS. The major constituents of essential oil were found to be: cis-ocimene (11.00%), trans-ocimene (9.65%), elemol (9.15%), β-elemene (8.75%), germacrene-D (7.55%), trans-caryophyllene (5.90%), γ-elemene (5.40%) and τ-muurolol (4.95%). Then, the antioxidant potential of the essential oil was evaluated by the methods of total polyphenolic content (TPC) assay, DPPH radical scavenging activity, ABTS radical scavenging activity and ferric reducing antioxidant power (FRAP). It was estimated that the total poly-phenolic content of the oil was 136.7 ± 0.13 mg GAE/g and the efficient concentration of the oil required to scavenge 50% DPPH radicals (EC<sub>50</sub> value) was 639.33 μg/mℓ. Also, ABTS radical scavenging activity was identified to be con-centration dependent, while the FRAP value was 31.21 ± 0.12 μM FeSO<sub>4</sub> ·7H<sub>2</sub>O/g. Such figures, as a result, suggest that the essential oil extracted from the leaves of N. aciculata has its antioxidant activity, which can serve as sig-nificant health functional benefits.
정민지(MinJi Jeong),김진용(Jinyong Kim),정창현(Changhyun Jeong),이영석(Youngseok Lee),정도현(Dohyun Jung) 대한인간공학회 2011 대한인간공학회 학술대회논문집 Vol.2011 No.5
The most people have some representative prejudices when they are facing women drivers while driving. They tend to associate with female drivers as interrupters who impede the flow of the road. For example, the people who drive too slowly alone, drivers who have frequent sudden stop and a quick start and inexperienced people with changing lanes. In this paper, we have studied deceleration characteristics which is one of drivers' traits according to drivers' gender when they driving on the highway for investigating the truth. For experiments, we recruited twenty men and twenty women patients who are 30~40 years old. Highway is selected as a test course to reduce to a minimum impact from environment Brake Act signals that is transported from vehicles are used to analyze and same a highway and a vehicle are used at the same time. About 20 minutes before starting the test have been adapted to the drivers to get used a test vehicle. Through the result of this study, we would like to identify male and female drivers' deceleration characteristics and reconsider preconceptions about women drives that most people have.