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실시간 온라인 화상 한국어 수업에서의 상호작용 -사회통합프로그램 수업을 중심으로-
최은지 ( Choi Eunji ) 겨레어문학회 2021 겨레어문학 Vol.67 No.-
본고에서는 실시간 온라인 화상 한국어 수업에서의 상호작용 양상을 분석하고 자 하였다. 이를 위해 본고에서는 3개의 한국어 교실에서 실시간 온라인 방식으로 진행된 한국어 수업 26차시를 녹화하고 이를 전사하여 분석하였다. 분석은 수업에서의 교사와 학습자의 발화량, 연습 활동과 의사소통 활동의 유형, 상호작용 활동의 조직 유형에 대해 이루어졌다. 본 연구의 분석 결과 실시간 화상 온라인 한국어 수업에서는 교사의 발화량이 전체의 80% 내외를 차지하는 것으로 나타났다. 분석 결과 온라인 수업에서 학습자의 발화량은 일반 수업에서보다 적었는데, 이는 학습자의 자유로운 발화를 독려하는 언어 사용 시간의 비중이 높지 않았기 때문이었다. 또한 언어 사용 시간에도 학습자의 주도적인 의사소통 활동이 많이 이루어지지 않고 있었으며 상호작용의 조직 방식 역시 단조로운 유형으로 나타났다. Interaction of Korean class on real-time online video is analyzed in this study. In this purpose, 26 times of Korean classes conducted on real-time online method in three Korean classrooms were recorded and transcribed and analyzed in this study. The analysis was conducted on the amount of utterance of teachers and learners in class, the type of practice and communication activities and the type of organization of interaction activities. It was found that the amount of teacher utterance accounted for around 80% of the total in Korean classes on real-time online video as a result of the analysis in this study. The learner’s speech amount in online classes was less than in general classes because the proportion of language use time encouraging learners to speak freely was not enough as a result of the analysis. Also, learners did not have many leading communication activities even during language use time and the organization of interaction was also in monotonous types.
Post-Use의 사용자조사를 위한 기초연구 : Post-Use의 정의와 사례조사를 중심으로
최은지(Choi Eunji),이건표(Lee Kunpyo) 한국디자인학회 2010 한국디자인학회 학술발표대회 논문집 Vol.2010 No.10
This study tries to understand, define, and categorize Post-Use as fundamental research of user research on Post-Use. Since user research has been mostly focused on tbe acquisition of product, and its usage so far, user research on Post-Use didn't get much attention, and were almost neglected. In order to figure out the potential of user research on Post-Use, the concept of Post-Use itself needs to be understood and well defined first of all. In order to define the concept of Post-Use, it is also required to look at life cycle of product, because it is the base that can be used in the definition of Post-Use. After understanding life cycle of product, and defining Post-Use, it can be largely classified into 3 categories: reuse, recycle, and remanufacture. Categories of reuse and remanufacture have its sub categories such as reuse by recognition, distribution, and repair, and remanufacture by component, and product itself. Based on these categories, case study was conducted. This study is helpful for understanding the concept of Post-Use, and expected to be utilized as a fundamental frame for conducting user study in the follow up research.
소포제 첨가에 따른 Trichoderma sp.의 cellulase 활성 변화
최은지 ( Eunji Choi ),김영숙 ( Yeong-suk Kim ),윤정희 ( Jeonghee Yun ) 한국목재공학회 2021 한국목재공학회 학술발표논문집 Vol.2021 No.2
Trichoderma sp. is a widely used fungal strain that produces lignocellulolytic enzymes. During the incubation in bioreactor, there are significant physical parameters such as temperature, pH and gas flow rate and they can affect enzyme production. The intense aeration and stirring in the process of bioreactor can cause the formation of foam. Foam can negatively affect cells and proteins and excessive foam on surface not only leads to reduction of oxygen transfer, but can also overflow the bioreactor and cause safety issues during operation. These problems can result in decreased process productivity, therefore antifoaming agents are crucial to preventing the formation of foam. In present study, Cellulase activity during incubation of Trichoderma sp. in lab scale bioreactor was monitored dependent on types of antifoaming agent. Endoglucanase(endo-1,4-β-d-glucanase EG, EC 3.2.1.4) and β-glucosidase(1,4-β-d-glucosidase, BGL, EC 3.2.1.21) activity were periodically measured. At the maximum enzyme activity, it was observed that Trichoderma sp. incubated with antifoaming agents increased EG and BGL activity by 4-fold and 3-fold, respectively after 15days of incubation. These results suggest that the addition of antifoaming agents is essential for incubation and may have significant effect on the increase in fungal growth and cellulase production.
최은지(Eunji Choi),이정원(Jungwon Lee),임혜숙(Hyesook Lim) 대한전자공학회 2021 대한전자공학회 학술대회 Vol.2021 No.6
A difference invertible Bloom filter(d-IBF) has been used to identify the difference of sets using two invertible Bloom filters. However, since decoding depends only on pure cells, the decoding performance is very low in case of memory less than a certain size. In this paper, we classify the types of decoding errors in d-IBF, and propose a new decoding method that improves the decoding performance. Simulation result shows that the proposed decoding method reduces the number of occurrences of each type causing decoding errors, which allows us to identify the difference of sets even in a smaller size of memory.
UAV 및 모바일 기기를 위한 얼굴 표정 인식 네트워크
최은지(Eunji Choi),박병준(Byeongjun Park),윤경로(Kyoungro Yoon) 한국방송·미디어공학회 2021 한국방송공학회 학술발표대회 논문집 Vol.2021 No.6
최근 자동화의 필요성이 증가함에 따라 얼굴 표정 인식 분야(face expression recognition)가 인공지능과 이미지 처리 분야에서 활발히 연구되고 있다. 본 논문에서는 기존 인공신경망에서 요구되었던 고성능 GPU 환경과 높은 연산량을 극복하고자 모델 경량화(Light weighted Model) 기법을 적용하여 드론 및 모바일 기기에서 적용될 수 있는 얼굴 표정 인식 신경망을 제안한다. 제안하는 방법은 미세한 얼굴의 표정 인식을 위한 방법으로, 입력 이미지의 receptive field 를 늘려 특징 맵의 표현력을 높이는 방법을 제안한다. 또한 효과적인 신경망의 경량화를 위하여, 파라미터의 연산량을 줄일 때 발생하는 문제점을 극복하기 위한 방법을 제시한다. 따라서 제안하는 네트워크를 적용하면 많은 연산량과 느린 연산속도로 인해 제한되었던 네트워크 환경을 극복할 수 있을 뿐만 아니라, UAV(Unmanned Aerial Vehicle, 무인항공기) 및 모바일 기기에서 신경망을 이용한 실시간 얼굴 표정 인식을 할 수 있다.