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나상훈,김유곤 서강대학 지역발전연구소 1999 지역발전연구 : 서강전문대 Vol.5 No.2
This study based upon theoretical contemplation has tried to analyze the composition of open school spaces of the elementary schools in Kwang-ju whose designs have been chosen by competition since 1990, and thereby to suggest both its problems and basic materials necessary for the construction of new type of school buildings. The results of this study are as follows: The school buildings are usually separated and arranged according to higher classes and lower classes, special classrooms and general classrooms, and classrooms and control offices. But there are usually pilots on the first floor, the other floors are connected directly and often there are arranged special rooms in connecting passages. School buildings, a gymnasium, and a play ground are common factors in every school. And there are small play grounds for lower class students or kindergarteners who have some difficulty in using play grounds, and these spaces are separated and arranged for higher class students, lower class students, and kindergarteners each. In many schools, the size of a unit classroom is the standard size of 67.5㎡. But it seems that a size of each unit classroom must be enlarged to utilize small spaces and to provide some spaces for open education.
나상훈 서울대학교 규장각한국학연구원 2019 Seoul journal of Korean studies Vol.32 No.2
The purpose of this translation is to introduce the letters exchanged between Yi I and his friend Song Ikp’il concerning the Kyŏngmong yogyŏl 擊蒙要訣 (Essential instructions on rectifying folly), thereby identifying the role Song Ikp’il played in the making of this text. Most previous translators and researchers have been unaware that the Kyŏngmong yogyŏl circulated in a draft version that Yi I revised after intensive review by his close friend Song Ikp’il. This fact is evidenced by letters exchanged between the two in which they discuss the work. I provide translations of these letters to inform readers of the issues raised in the letters and call attention to the differences between the first draft and the published work.
나상훈,김순곤 서강대학 지역발전연구소 1996 지역발전연구 : 서강전문대 Vol.2 No.-
A cultural background study on its historical view is essential to understand the Korean traditional architecture. We can analyze the implied meanings and symbolic features of the building more easily and clearly through its proper interpretation. Some of the important research findings are summarized below: 1. Composition of village space in Nak-An Eup-Sung, shows formation of a space ward axis influenced by the Shamanstic elements. Consequently, we can recongnize that the village was formed by a shamanstic space ordering system. 2. Theideologic system in Shamanism, which influenced space composition in natural villages, provides elements, such as centrality, territoriality, and directionality of the space through the process of sanctifying villagers own living spaces. we can realize that village space has accordingly systemized in order by these elements.
나상훈 서강정보대학 2002 論文集 Vol.21 No.-
This is a basic research for the suggestion of reasonable methods of an estimation research of views. For this purpose, many foreign and domestic researches related to view estimation have been studied, and thereby, by noting periodical trends, approach methods, individual researchers' ways, experiment and variables, common methods of measurements and analyzation have come to be arranged. And also based upon this, a frame of view estimation method has been structured.
Evaluation of Local Flow Conditions in Jailed Side Branch Lesions Using Computational Fluid Dynamics
나상훈,구본권,김정철,양한모,박건우,강현재,김효수,오병희,박영배 대한심장학회 2011 Korean Circulation Journal Vol.41 No.2
Background and Objectives: Lesions of vascular bifurcation and their treatment outcomes have been evaluated by anatomical and physiological methods, such as intravascular ultrasound and fractional flow reserve (FFR). However, local changes in flow dynamics in lesions of bifurcation have not been well evaluated. This study aimed at evaluating changes in the local flow patterns of bifurcation lesions. Materials and Methods: Eight (n=8) representative simulation-models were constructed: 1 normal bifurcation, 5 main-branch (MB) stenting models with various side-branch (SB) stenoses (ostial or non-ostial 75% diameter stenosis with 1- or 2-cm lesion lengths, ostial 75% diameter stenosis caused by carina shift), and 2 post-kissing models (no or 50% SB residual stenosis). Pressure, velocity, and wall shear stress (WSS) profiles around the bifurcation sites were investigated using computational fluid dynamics. Results: Post-stenting models revealed significant pressure drop in the SB (FFR <0.75), excluding the carina shift model (FFR=0.89). In the post-kissing models, there was no significant pressure drop. All post-stenting models revealed eccentric low velocity flow patterns and areas of low WSS, primarily in the lateral wall on distal MB. Post-kissing angioplasty improved pressure drop in the SB but resulted in alteration of flow distribution in the MB. In the carina shift model, kissing ballooning resulted in deteriorated local flow conditions due to increased area of low velocity and WSS. Conclusion: This study suggests that the most commonly used bifurcation intervention strategy may cause local flow disturbances, which may partially explain high restenosis and event rates in patients with bifurcation lesions.
나상훈,신상도,노영선,Eui Jung Lee,송경준,박창배,김주영 대한의학회 2013 Journal of Korean medical science Vol.28 No.2
This study aimed to describe the characteristics of out-of-hospital cardiac arrest (OHCA)according to specific activity types at the time of event and to determine the association between activities and outcomes according to activity type at the time of event occurrence of OHCA. A nationwide OHCA cohort database, compiled from January 2008 to December 2010 and consisting of hospital chart reviews and ambulance run sheet data, was used. Activity group was categorized as one of the following types: paid work activity (PWA),sports/leisure/education (SLE), routine life (RL), moving activity (MA), medical care (MC),other specific activity (OSA), and unknown activity. The main outcome was survival to discharge. Multivariate logistic analysis for outcomes was used adjusted for potential risk factors (reference = RL group). Of the 72,256 OHCAs, 44,537 cases were finally analyzed. The activities were RL (63.7%), PWA (3.1%), SLE (2.7%), MA (2.0%), MC (4.3%), OSA (2.2%), and unknown (21.9%). Survival to discharge rate for total patients was 3.5%. For survival to discharge, the adjusted odds ratios (95% confidence intervals) were 1.42 (1.06-1.90) in the SLE group and 1.62 (1.22-2.15) in PWA group compared with RL group. In conclusion, the SLE and PWA groups show higher survival to discharge rates than the routine life activity group.