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광전극 소재를 중심으로 본 광전기화학적 이산화탄소 전환기술 동향 분석
박이슬(Yiseul Park),최지나(Jina Choi) 한국에너지기후변화학회 2016 에너지기후변화학회지 Vol.11 No.1
This work is a short review of recent studies on photoelectrochemical reduction of carbon dioxide (CO₂). Photoelectrochemical reduction of CO₂ is a light-driven CO₂ reduction, which harnesses solar energy to convert CO₂ into higher-energy products (e.g., liquid fuels). Studies on photoelectrochemical cell have mainly focused on photoelectrochemical H₂ production via water splitting, but, recently, photoelectrochemical reduction of CO₂ have been actively investigated as a part of the artificial photosynthesis studies. In this short review, the recent literature on photoelectrochemical reductions of CO₂ is reviewed. Various photoanode and photocathode materials are compared and different approaches to enhancing solar-to-fuel efficiency and selectivity of target product are described.
리튬이온커패시터용 Polyaniline/WO<sub>3</sub> 음극 제조 및 이의 광 조사에 따른 전기화학적 특성 변화
박이슬 ( Yiseul Park ) 한국화학공학회 2018 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.56 No.6
In this study, polyaniline (PANI)/WO<sub>3</sub> electrode was prepared as an anode of a lithium ion capacitor, and its electrochemical characteristics were measured and analyzed. When PANI was electrochemically deposited on the surface of WO<sub>3</sub> electrode, the capacity of PANI/WO<sub>3</sub> was improved with increase of the deposited amounts of PANI. Furthermore, the effect of light irradiation on capacity and coulombic efficiency was examined by irradiating sunlight during charging and discharging. When the light was irradiated to the WO<sub>3</sub> electrode and the PANI/WO<sub>3</sub> electrode, those capacities and coulombic efficiencies were increased compared to that measured under the dark condition. It is attributed to the photocatalytic property of WO<sub>3</sub> that can generate photoelectrons by light irradiation. In PANI/WO<sub>3</sub> electrode, PANI also can be excited under the light irradiation with affecting the electrochemical property of electrode. The photoelectrons improve the capacity by participating in the intercalation of Li<sup>+</sup> ions, and also improve the coulombic efficiency by facilitating electrons’ transport. Under the dark condition, the capacity of PANI/WO<sub>3</sub> was gradually reduced with increase of cycles due to a poor stability of PANI. However, the stability of PANI was significantly improved by the light irradiation, which is attributed to the oxidation-reduction reaction originated from the photogenerated electrons and holes in PANI/WO<sub>3</sub>.
박이슬,고일주,박준형,Park, Yiseul,Ko, Ilju,Park, Junhyoung 디지털산업정보학회 2016 디지털산업정보학회논문지 Vol.12 No.3
Online games, by a massive influx of many players, it has diverse situations in which emotion is generated. Emotion plays an important role that helps players to interact and immerse in game. In the previous games, simple structures are used to express emotion. By increasing the user's needs of emotion in the game, it is necessary to structure a various type of emotion. In this paper, the game components were classified as background, object, and character in order to analyze emotion structurally in game. We defined how to use the rule of emotion, and applied to League of legend, Cyphers and World of Warcraft which belong to the AOS genre. The AOS game is well-suited for analyzing emotion structure, because a various emotional changes and situations can arise in the game. Through this paper, it was discovered similarities emotion to be used in online games. It is expected to generalize the emotion in the game by analyzing the emotional structure of more games in future.
조용희(Yonghee Cho),박이슬(Yiseul Park),김혜진(Hea-Jin Kim) 한국콘텐츠학회 2018 한국콘텐츠학회논문지 Vol.18 No.5
본 연구에서는 영화 관람 후 높은 평점을 매긴 집단과 낮은 평점을 매긴 집단 중 어느 집단이 영화에 대해 더 많은 이야기를 하는지, 즉 온라인 리뷰를 길게 작성하는지에 대해 알아보고자 하였다. 이를 위해 네이버 영화 API에서 제공하는 영화 평점과 리뷰 데이터를 수집하였고, 한국영화진흥위원회에서 제공하는 영화 손익분기점 데이터를 이용하여 영화를 흥행성공, 흥행부진, 흥행실패로 구분하여 영화 평점과 리뷰길이 간의 상관관계, 영화 개봉 전과 후, 흥행여부에 따른 리뷰길이의 특성, 마지막으로 영화 평점이 리뷰길이에 영향을 미치는가에 대한 회귀분석을 실시하여 제시하였다. The study aims to determine which groups leave longer(more active) online reviews(comments) on the film by separating groups, one that satisfied with the movie while the other group dissatisfied with the movie. The data used were rating scores and reviews(comments) from Naver Movie API, and break-even point data provided by Korea Film Commission. We analyzed the relationship between movie rating and review length, before and after movie opening, the characteristics of review length according to the box office, and whether the movie rating affects the review length.