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이동언,Lee, Dong-Eon 한국건축역사학회 1999 건축역사연구 Vol.8 No.2
The purpose of this paper is to apply Stephen C. Pepper's contextualism to architecture: to interpret the former in the light of architectural theory, and ultimately to liberate architecture from the Western 'Idea' and return it to its context. The major concepts of Pepper used in the paper are quality, texture, spread, change, fusion, strand and context. Pepper's contextualism makes us realize that architecture cannot be separated from its context where human beings, history, neighborhood, and nature are all interpenetrating, and create a quality. Contextualism thus teaches us to make an effort to understand the region where we belong, and to create an architectural device that interrelates form and function of an architecture with its space-time environment, or its strand, texture and context.
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이동언,류현욱,안재윤,문성배,김종건,김윤정,박정배,김정호,이경우,진상찬 대한응급의학회 2018 大韓應急醫學會誌 Vol.29 No.6
Objective: The increasing number of people living in high-rise apartments may result in a delayed response from emergency medical technicians called out for an out-of-hospital cardiac arrest, making the role of apartment managers as the first responders extremely important. This study investigated whether automated external defibrillator (AED) placement influences the willingness of apartment managers to perform cardiopulmonary resuscitation (CPR) and use an AED. Methods: A cross-sectional target population-based survey was conducted in Daegu, July 2016. Questionnaires were sent to apartment managers working in apartments with more than 500 households. The general characteristics of the respondents, status of CPR education, and knowledge about and willingness to perform CPR and use an AED were investigated. Results: Of the 1,445 respondents, 758 (52.5%) worked in apartments with AEDs, of which 77.8% and 70.8% were willing to perform CPR and use an AED, respectively, compared with 68.1% and 60.0% of respondents who worked in apartments without AEDs. After adjusting for potential confounders, AED placement was associated with the willingness to perform CPR (odds ratio [OR], 1.33; 95% confidence interval [CI], 1.04-1.71) and use an AED (OR, 1.39; 95% CI, 1.10-1.75). Prior CPR training and accurate knowledge of CPR skills were also associated with the willingness to perform CPR and use an AED. Conclusion: Placing AEDs in high-rise apartment buildings and providing refresher CPR education for maintaining CPR skills will be necessary to support apartment managers in their role as first responders.
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세계, 사인(Sign) 그리고 건축 - 개념적 건축과 창조적 건축의 구분을 위한 시도 -
이동언,Lee, Dong-Eon 한국건축역사학회 1995 건축역사연구 Vol.4 No.2
The main aim of the paper is to reveal what is the sign in art and architecture and what is difference between technology and art. By keeping in mind the suggestions of Heidegger's four different worlds, we become able to discern or elaborate on four different contexts of signs and modes in which the sign can work. World (1) is not conceptualized by selected relations of some of things' aspects with one another; rather, it is constructed by our sensory impressions. The sign of World (1) simply points to other objects occurring in the situation. World (2) emerges as an ontological term, and signifies, in terms of relations that are now brought systematically forth, the Being of those entities of World (1) which we naively perceive or take for granted. The sign of World (2) signifies a constructed world. World (3) is understood as the 'wherein' or environment of beings whose total activity is proven to be inseparable from their circumstances. The sign of World (3) is to recover the perspicuous silence of World (3). The World (4) is the ontological-existential understanding of worldhood. The sign of World (4) is to reveal the conspicuous silence of World (4). Finally, the paper suggests that art including architecture cannot be the sign of World (1), (2) but the one of World (3).
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Equivalence ratio variation and combustion instability in hybrid rocket
이동언,이창진 대한기계학회 2019 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.33 No.10
In this paper, a series of combustion tests using PMMA/O2 was conducted to examine the initiating characteristics of low frequency instability (LFI) in relation to the changes in both flow and combustion conditions. By selecting parameters such as the oxidizer mass flow rate, fuel grain length, and mixing ratio of mixture oxidizer composed of oxygen and nitrogen; combustion tests were conducted to vary the equivalence ratio in the combustion. This study further validated instability characteristics in connection with coupling behavior between the high frequency pressure and heat release oscillations in 500 Hz band. Based on the results, a combustion stability map was plotted and it shows that the initiation of LFI is contingent upon the satisfaction of specific conditions of flow and combustion. The results also confirmed that the initiation of LFI is highly linked to an establishment of a positive coupling between high frequency pressure and heat release oscillations. In addition, equivalence ratio was found to be a critical factor in the transition of coupling status between the two high frequency oscillations. For a given flow condition, the sole increase in equivalence ratio above a certain threshold resulted in the phase shift between the two oscillations leading to a positive coupling or vice versa.
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