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KiTae KIM(KiTae KIM),HoSung WOO(HoSung WOO) 한국4차산업학회 2022 4차산업연구 Vol.2 No.2
Purpose - The purpose is to present an efficient library-use education model in the form of flip learning, reflecting traditional teaching methods and gamification elements even in such non-face-to-face and face-to-face situations after COVID-19. Research design, data, and methodology - Research on library use education, research on ubiquitous environment and gamification instructional design, flip the learning, and gamification elements are classified, compared, and analyzed to present educational models for library education, COVID-19 Pandemic situation, and subsequent library use education. Result - We propose an e-learning content development strategy for flipped learning-based library education. First, benchmark and use the existing educational contents. Second, a user-friendly interface is configured so that learners can flexibly organize their learning contents. Third, it allows learners to experience it directly or indirectly in a virtual space. Conclusion - If the e-learning environment can be standardized to the level of schools or educational institutions, a good educational model that can be used not only in library user education but also in other fields will be possible.
The Study of the Effect of Transportation on Issuerelevant Thoughts in Narrative Persuasion
Kitae Kim(Kitae Kim),Jisoo Park(Jisoo Park) 글로벌지식융합학회 2023 지식융합연구 Vol.6 No.1
기존의 설득 내러티브(persuasive narratives) 연구에서는 독자의 내러티브의 몰입(transportation)이 내러티브에서 논하는 이슈에 관한 생각과 비판적 사고를 방해한다는 ‘몰입과 이슈 관련 사고의 양립불가능 원칙(the principle of incompatibility of transportation and issue-relevant thought)’을 제시하였다. 그러나 이전 연구에서는 설득적 의도가 명확하지 않은 내러티브를 사용한 경우가 많았다. 본 연구는 개인의 인지적 반응을 수집하기 위해 활용되는 ‘사고 목록 작성(thought-listing)’ 방법을 원용하여, 109명의 대학생에게 기존의 연구와는 달리 좀 더 노골적이고 명확한 설득의도를 가진 메시지로 위 원칙을 테스트해보았다. 본 연구결과는 위 원칙에 반대되는 결과를 보여주었는데, 내러티브에 몰입한 정도는 이슈에 대한 생각의 긍·부정 여부는 상관없이 이슈에 관한 생각 정도와 부적 상관관계를 가지지 않았으며 심리적 반발심(PR)이나 논리적 반박(CA)과 같은 설득에의 저항도 이슈에 관한 생각정도와 유의미한 관계를 나타나지 않았다. 즉, 본 연구결과는 설득 목적 내러티브의 이슈에 관한 생각과 비판적 사고는 내러티브에 대한 몰입보다 내러티브의 설득의도가 이야기 속에 얼마나 명확하게 제시되는 지에 더 큰 영향을 받을 수 있다는 점을 시사한다. The previous research of persuasive narrative messages has suggested that transportation into narratives prohibits issue-relevant thinking and critical thoughts on the issue, which is known as “the principle of incompatible of transportation and issue-relevant thought”. However, the previous research did not use narrative appeals with explicit persuasive intent and strong argument. Furthermore, the issues in the narratives were often not personally relevant. Hence, employing thought-listing techniques, this study tested the principle with persuasive narrative messages that had more explicit persuasive intention and more relevant issue to the participants. The findings of this study contradicts the principle: the extent to which the participants were transported into the story was not negatively associated with the number of issue-relevant thoughts, regardless of the valence of the thoughts. Consequently, this study suggests whether people are willing to think about the issue of persuasive narrative messages may be more related to the how explicitly the persuasive intent in narratives is presented in the narratives rather than transportation into the narratives.
Nonlinear Thomson Scattering for Attosecond X-ray Pulse Generation
Kitae Lee,Seong Hee Park,Young Uk Jeong 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.4
Coherent nonlinear Thomson scattering using a relativistic electron beam has been obtained and can be used to generate attosecond X-ray pulses. When the laser intensity becomes relativistic (>1018 W/cm2), an electron conducts relativistic oscillatory motion, causing radiation with a harmonic spectrum. Under a plane-wave approximation, an analytic formula to describe the coherent spectrum generated from an electron beam has been developed. This formula leads to a condition, under which the radiations scattered from different electrons in an electron beam might coherently add. We find that with an electron beam of a few tens of nanometers in length, an X-ray pulse with a pulse length of a few tens of attoseconds can be generated. Including the finite focal size of the laser pulse, we have estimated that a few tens of terawatts will be required to demonstrate coherent nonlinear Thomson scattering.
Exergy Analysis of On / Off Controlled Heat Pump
Kitae Jang,Kwanwoo Nam,Sangkwon Jeong 대한설비공학회 1999 International Journal Of Air-Conditioning and Refr Vol.7 No.-
A multi-type heat pump controls the mass flow rate of the working fluid to cope with variable heat loads when it is under dynamic load condition. This paper describes the exergy analysis associated with the unsteady response of a heat pump. First, a basic heat pump cycle is examined at a steady state to show the general trends of exergy variations in each process of the cycle. Entropy generation issue for the heat exchangers is discussed to optimize the heat pump cycle. Secondly, the performance of the inverter-driven heat pump is compared to that of the conventional one when the heat load is variable. Thirdly, the exergy destruction rate of the heat pump with On/Off operation is calculated by simulating the thermodynamic states of the working fluid in the condenser and the evaporator. The inefficiency of On/Off operation during the transient period is Quantitatively described by the exergy analysis.
In vivo evaluation on the safety of DMZ-109, 121 and 129 in Balb/c mice
Kitae Park,Young Nam Kim,Min Hee Hwang,Hye-jin Ko,Young-Rak Cho,Eun-Kyung Ahn 한국실험동물학회 2021 한국실험동물학회 학술발표대회 논문집 Vol.2021 No.7
To evaluate the safety of DMZ-109, 121 and 129, natural herb effective in anti-allergic, we performed the single oral dose toxicity test in Balb/c mice. In order to calculated 50% lethal dose (LD50) and approximate lethal dose (LD), test articles were once orally administered to male and female Balb/c mice. The animals were distributed into 8 groups of 5 mice per group according to their body weight. After administration with each sample (500, 1000 and 2000 mg/kg), the mortality and changes on body weight, clinical signs, gross observation, organ weights (heart, lung, liver, spleen, kidney and reproductive organs) were monitored 14 days after administration of DMZ-109, 121 and 129. We also conducted hematolocial test and serum clinical chemistry test (glucose, TP, ALB, AST, ALT, T-bil, total cholesterol, TG, LDL, HDL, LDH, D-bil and UA) after animal sacrifice. Any mortalities, test article related clinical signs and gross findings, significant body and organ weight changes, hematolocial changes and serum chemistry changes were not found. The results obtained in this study suggest that LD 50 and approximate LD in mice after single oral dose of DMZ-109, 121 and 129 were speculated over 2000 mg/kg in both male and female mice.