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안희진 ( An¸ Heejin ),최성규 ( Choi¸ Seongkyu ),김정원 ( Kim¸ Jungwon ) 안암교육학회 2021 한국교육학연구 Vol.27 No.3
본 연구는 A사이버대학교에 근무하고 있는 수업조교의 활동을 통하여 온라인 수업 운영 모습을 드러내고, 특징을 도출하고자 한다. 이를 위해 수도권에 위치한 A사이버대학교에서 근무하고 있는 4명의 수업조교를 연구 참여자로 선정하여 참여관찰·심층면담·관련문서를 중심으로 질적 사례연구를 진행하였다. 연구결과 온라인 수업에서 수업조교의 활동은 크게 3가지로 구분된다. 업무 익히기에서는 ‘정신없는 학기초’, ‘업무 배우기’로 드러났다. 수업운영 보조로 ‘수업 모니터링’, ‘소통의 가교자’ 활동을 하는 것으로 나타났다. 좌충우돌하기에서는 ‘샌드위치 수업조교’, ‘갈등 해결하기’로 수업 운영 과정에서의 어려움과 해결 과정을 드러냈다. 이와 같은 수업조교 모습은 수업 보조자와 모호한 업무 적정선이라는 특징이 도출되었다. 이를 개선하기 위하여 수업조교 명칭 변화, 교수에게 역할 안내, 수업조교 업무 교육을 통하여 자연스럽게 조직문화가 개선될 수 있도록 해야 한다. 나아가 일반대학교에서의 온라인 교육에서도 학생 관리와 교수자의 온라인 교육 부담을 도와줄 인적·물적 자원과 교수자의 온라인 교육, 환경 구축이 필요하다. The purpose of this study is to reveal online class operations and derive characteristics through the activities of cyber university class assistants. To this end, four class assistants working at A Cyber U niversity located in the metropolitan area were selected as research participants and qualitative case studies were conducted focusing on participatory observations, in-depth interviews, and related documents. As a result of the study, the activities of class assistants in online classes are broadly divided into three categories. First, in the task mastery, it was revealed that ‘At the beginning of semesters with too much workload’ and ‘Work and learn at the same time’. Second, it was found that they were engaged in activities such as ‘Classroom monitoring’ and ‘Communication bridge’ to assist in class management. Lastly, in the left-to-right conflict, “Class assistant like a sandwich” and “Resolving Conflict” revealed difficulties and solutions in the course of operating the class. The characteristics of such class assistants were derived from the ambiguous line of work appropriate to the class assistants. In order to improve this, the organizational culture should be improved naturally by changing the name of the class assistants, guiding the instructors to the correct role of the class assistants, and job training for class assistants. Furthermore, in online education at general universities, it is necessary to provide human and material resources to help student the burden of online classes for instructors, to support online class operation education for instructors, and to establish an online education environment for universities.
Choi, Eunyoung,Han, Cecil,Park, Inju,Lee, Boyeon,Jin, Sora,Choi, Heejin,Kim, Do Han,Park, Zee Yong,Eddy, Edward M,Cho, Chunghee American Society for Biochemistry and Molecular Bi 2008 The Journal of biological chemistry Vol.283 No.50
<P>To determine the mechanisms of spermatogenesis, it is essential to identify and characterize germ cell-specific genes. Here we describe a protein encoded by a novel germ cell-specific gene, Mm.290718/ZFP541, identified from the mouse spermatocyte UniGene library. The protein contains specific motifs and domains potentially involved in DNA binding and chromatin reorganization. An antibody against Mm.290718/ZFP541 revealed the existence of the protein in testicular spermatogenic cells (159 kDa) but not testicular and mature sperm. Immunostaining analysis of cells at various stages of spermatogenesis consistently showed that the protein is present in spermatocytes and round spermatids only. Transfection assays and immunofluorescence studies indicate that the protein is localized specifically in the nucleus. Proteomic analyses performed to explore the functional characteristics of Mm.290718/ZFP541 showed that the protein forms a unique complex. Other major components of the complex included histone deacetylase 1 (HDAC1) and heat-shock protein A2. Disappearance of Mm.290718/ZFP541 was highly correlated with hyperacetylation in spermatids during spermatogenesis, and specific domains of the protein were involved in the regulation of interactions and nuclear localization of HDAC1. Furthermore, we found that premature hyperacetylation, induced by an HDAC inhibitor, is associated with an alteration in the integrity of Mm.290718/ZFP541 in spermatogenic cells. Our results collectively suggest that the Mm.290718/ZFP541 complex is implicated in chromatin remodeling during spermatogenesis, and we provide further information on the previously unknown molecular mechanism. Consequently, we re-designate Mm.290718/ZFP541 as 'SHIP1' representing spermatogenic cell HDAC-interacting protein 1.</P>
Lee, Heejin,Joo, Ho-yong,Yoon, Chulmin,Lee, Joonbong,Lee, Hojin,Choi, Jinsik,Park, Baeho,Choi, Taekjib Elsevier 2017 Current Applied Physics Vol.17 No.5
<P>Ferroelectric based heterostructures have shown great promises in solar water splitting due to unique photoelectrochemical (PEC) properties including polarization-induced charge separation and tunable electrochemical surface reaction. A highly ordered ferroelectric BiFeO3/TiO2 nanotube (TNT) heterostructures were fabricated by anodic oxidation and pulsed laser deposition. The microscopic morphology, optical, and PEC properties of nanostructures were characterized. The BiFeO3/TNT photoelectrode is photoactive under visible light illumination, which exhibits higher photocurrent from greater water oxidation, compared with the pure TNT photoelectrode. The coating thickness of BiFeO3 strongly affected the photoelectrochemical properties. The enhanced PEC performance could be attributed to the effective charge separation and the favorable band bending for water oxidation, originating from ferroelectric polarization-related internal field. (C) 2017 Elsevier B.V. All rights reserved.</P>
정맥영양 공급을 위한 3-Chamber Bag 제제에 대한 고찰
최희진 ( Heejin Choi ) 한국정맥경장영양학회 2017 한국정맥경장영양학회지 Vol.9 No.1
Total parenteral nutrition (TPN) therapy has advanced significantly during the recent half a century, from single bottle therapy to the combined therapy including macronutrients and micronutrients. The purposes of 3-chamber bag development are to reduce the restriction of total nutrient admixture, and increase the accessibility of therapy. This is also based on trial and errors during R&D activities, and the clinical experiences at the hospital compounding centers. The 3-chamber bag started with concerns regarding the mixture of fat and glucose and amino acids, but up to the present, it is used widely with clinical experience of more than 15 years. Therefore, it might be reasonable to ensure that its efficacy and safety is confirmed. The physicians have reported that it contributes to the convenient and efficient nutrition therapy, allowing enhanced patient compliance and convenience at hospital. In addition, depending on the further R&D works, 3-chamber bags are expected to advance further, opening a new landscape for advanced nutrition therapy.
엔트로피 최대손실예상액과 Gini 평균차이를 활용한 금융 기업 주가 수익률의 리스크의 네트워크 기반 의존성 및 인과성 분석 방법론 개발
최인수(Insu Choi),남달리(Dalli Nam),고우성(Woosung Koh),김수민(Sumin Kim),박수견(Sookyun Park),박민영(Minyoung Park),양희진(Heejin Yang),이도영(Doyoung Lee),임소영(Soyeong Lim),최현수(Hyunsu Choi),김우창(Woo Chang Kim) 한국정보기술학회 2022 Proceedings of KIIT Conference Vol.2022 No.12