FLO-2D 모형을 이용한 우면산 토석류 유동 수치모의

김승은,백중철,김경석,Kim, Seungeun,Paik, Joongcheol,Kim, Kyung Suk 대한토목학회 2013 대한토목학회논문집 Vol.33 No.3

2011년 7월 27일 우면산 유역에서 일련의 토석류가 발생하여 많은 인명과 재산 피해를 야기했다. 이러한 토석류 피해를 저감하기 위해서는 토석류가 어떻게 이동하고 퇴적되어 하류부에 피해를 주는지를 예측할 수 있는 기술이 필요하다. 이 연구에서는 우면산 토석류에 대해서 FLO-2D 수치모형을 적용하여, 모형의 성능을 평가하고, 이들 토석류의 유동 매개변수를 분석하였다. 우면산 북측사면에서 발생한 토석류의 현장 관측자료와 FLO-2D 모의 결과 분석을 통해서 역산된 우면산 토석류의 대표 항복응력은 1,022 Pa 그리고 대표 동점성은 652 $Pa{\cdot}s$ 인 것으로 나타났다. 선정된 매개변수를 이용하여 우면산 토석류의 퇴적영역을 산정한 결과, 래미안 유역의 경우 63 - 85% 정확도의 피해유역을 재현됨으로서 FLO-2D 모형은 피해유역 산정에 적합한 것으로 나타났다. 하지만, FLO-2D 모형이 침식물질과 우수의 연행작용을 고려할 수 없는 고유의 한계 때문에 연행작용이 현저한 래미안 및 신동아 유역 토석류의 유하속도는 과소평가하는 것으로 나타났다. 유하부에서 침식에 의한 연행작용이 활발하지 않은 형촌마을 유역 토석류는 수로와 저수지 상부 부근에서의 퇴적을 우수한 정확도로 모의되었다. 민감도 분석 결과 유사체적농도와 바닥조도계수 모두 토석류의 흐름두께와 유속 모두에 상당한 영향을 미치는 것으로 나났으므로, 이들 매개변수의 선정에 신중해야 함을 보여주었다. Multiple debris flows occurred on July 27, 2012 in Mt. Umyeon, which resulted in 16 casualties and severe property demage. Accurate reproducing of the propagation and deposition of debris flow is essential for mitigating these disasters. Through applying FLO-2D model to these debris flows and comparing the results with field observations, we seek to evaluate the performance of the model and to analyse the rheological model parameters. Representative yield stress and dynamic viscosity back-calculated for the debris flows in the northern side of Mt. Umyeon are 1022 Pa and 652 $Pa{\cdot}s$, respectively. Numerical results obtained using these parameters reveal that deposition areas of debris flows in Raemian and Shindong-A regions are well reproduced in 63-85% agreement with the field observations. However, the propagation velocities of the flows are significantly underestimated, which is attributable to the inherent limitations of the model that can't take the entrainment of bed material and surface water into account. The debris flow deposition computed in Hyeongchon region where the entrainment is not significant appears to be in very good agreement with the field observation. The sensitivity study of the numerical results on model parameters shows that both sediment volume concentration and roughness coefficient significantly affect the flow thickness and velocity, which underscores the importance of careful selection of these model parameters in FLO-2D modeling.

폭약의 기폭위치에 따른 지반진동 예측

김승은 ( Seung Eun Kim ),류복현 ( Pog Hyun Ryu ),강추원 ( Choo Won Kang ),고진석 ( Chin Surk Ko ) 대한화약발파공학회 2010 화약발파 Vol.28 No.2

도심지 부근에서 이루어지는 암반 굴착작업의 증가에 따라 민원제기가 급증하고 있다. 이로 인해 발파설계시 안정성을 가장 우선적으로 고려하며, 그중에서도 지반진동을 제어하기 위한 노력이 필요하다. 본 연구에서는 발파진동의 전파특성을 결정하는 여러 인자들 중 발파조건인 기폭방법과 폭약의 종류에 따른 지반진동의 전파 특성을 알아보았다. 지반진동은 폭속이 작은 폭약에서 더 크게 나타났지만 진폭의 감쇠가 커서 진동이 멀리 전파되지 않는 특징이 나타났다. 기폭위치별 회귀분석 결과 중간기폭이 평균적인 진동수준이 가장 크게 나타났지만 감쇠가 커서 진동이 멀리 전파되지 않았다. 역기폭은 중간기폭보다 진동 수준은 낮았으나 감쇠가 작아서 진동이 멀리 전파하는 특징이 나타났다. Excavations by blasting in urban area have caused lots of complaints. Hence, special attentions need to be paid to controlling the ground vibrations in designing blasting for those areas. In this study, among the various parameters that can affect the propagation characteristics of ground vibrations, the effect of the priming location of explosive on the ground vibration level was studied for two types of emulsion explosives that had different detonation velocities. Three priming locations of top, middle, and bottom were considered in a charged hole. In the experiment on the effect of detonation velocity, the ground vibration caused by the explosive with a lower detonation velocity showed larger attenuation in the amplitude. The priming locations also affected the ground vibrations levels. The ground vibration level produced from middle priming was found to be larger than the other priming methods under the same blast conditions, but the attenuation of amplitude was also larger in this case. In contrast, the ground vibration level from bottom priming was not larger than the middle priming, but the attenuation was smaller so that the ground vibration was detected at a longer distance.

국내 수입 패션 멀티샵의 마케팅 전략(Ⅱ)

김승은(Seung Eun Kim),김선화(Sun Hwa Kim) 한국복식학회 2004 服飾 Vol.54 No.4

The study was done to provide domestic fashion multi-shops with basic information about the distribution and the promotion strategies through an investigation the marketing strategies for domestic multi-shop dealt with imported product only. Data were collected from Interview with a buyer or a staff of marketing department of Domestic Fashion Multi-shop dealt with Imported Product only. The results were as follows: For the distribution strategies, these fashion multi-shops as chosen were all placed in department stores. Their distribution channels were diverse like road shop, shop in department store and shop under direct management of department store. In case of shop in department store, it was common that the shop paid a definite commission to the department store. But S shop was managed directly by a department store as an advanced buying system that department store bought and sold goods and held themselves responsible for overstock. For the promotion strategies, these fashion multi-shops didn`t make a definite budget for advertising and publicity contrary to other one-brands. But they attached importance to visual merchandising (VMD) because they had to harmonized the concept of a shop with various brands. Also they concentrated on seasonal fashion show, management of their customers and personal sales.

The Effect of Laughter Therapy on Anxiety, Depression and Stress of Cancer Patients Admitted to Long-Term Care Unit

김승은(Seongeun Kim),김미선(Miseon Kim),정현철(Hyeoncheol Jeong) 물리치료재활과학회 2021 Physical therapy rehabilitation science Vol.10 No.2

Objective: This study is based on a parallax design before and after a non-equivalent control group to examine the effects oflaughter therapy on the anxiety, depression, and stress in patients with cancer admitted to a nursing hospital. Design: A randomized controlled trial. Methods: Data collection was conducted on 34 patients who agreed to participate in the study among patients admitted to ECancer Hospital from September to November 2018. Laughter treatment interventions were performed three times a week for 50minutes each and a total of eight times. In this study, a tool developed by Spielberger was used to measure state anxiety, a tooldeveloped by Beck was used to measure depression, and the Perceived Stress Scaled eveloped by Cohen was used to measure stress. Results: Anxiety was significantly lower in the experimental group than in the control group (F=10.74, p=0.003). Depression was lower in both the experimental group and the control group that did not participate in the laughter therapy intervention and was notsignificant (F=0.58, p=0.451). Stress was significantly lower in the experimental group than in the control group (F=4.36,p=0.045). Conclusions: The results of this study suggest that laughter therapy has a positive effect on reducing anxiety and stress in patientswith cancer admitted to nursing hospitals.

RA-STM을 이용한 철근콘크리트 보의 비틀림 거동 분석

김승은(Kim, Seung-Eun),무하마드 하룬(Muhammad, Haroon),김길희(Kim, Kil-Hee),이정윤(Lee, Jung-Yoon) 한국콘크리트학회 2017 한국콘크리트학회 학술대회 논문집 Vol.29 No.1

고강도 철근을 사용한 중공보의 비틀림 거동 분석

김승은(Kim, Seung-Eun),무하마드 하룬(Muhammad, Haroon),김길희(Kim, Kil-Hee),이정윤(Lee, Jung-Yoon) 한국콘크리트학회 2017 한국콘크리트학회 학술대회 논문집 Vol.29 No.2

선진녹색기술 해외연수기

김승은(Seungeun Kim),양승관(Seungkwan Yang) 대한토목학회 2010 대한토목학회지 Vol.58 No.6

중등 음악 교과 온라인 평가 방안 연구

김승은(Seung-Eun Kim),이보림(Bo-Lim Lee) 한국문화교육학회 2024 문화예술교육연구 Vol.19 No.1

TThis thesis aims to design an online evaluation plan for music subjects in an online environment. As overall innovation in education accelerates after the COVID-19 incident, the emphasis on online education and digital literacy is expanding day by day in music subjects. However, the unexpectedly expanded online class raised various concerns about teachers' classes and evaluations. This study went through four major research processes based on literature analysis and research methods to design an online evaluation plan for music subjects that can be used in three areas: performance, appreciation, and creation. First, through prior research and the 2022 revised music and curriculum, the understanding of educational evaluation, various educational evaluation models, online learning, and evaluation were investigated. Second, the principles and procedures of an appropriate evaluation plan for online learning of music subjects were presented. The principles of the online evaluation plan of the music subject consisting of four items and the eight-step evaluation procedure were designed. Finally, an example of application to the areas of performance, appreciation, and creation presented in the 2022 revised music curriculum was presented through the music subject online evaluation plan procedure described above. Through this, it was possible to use various evaluation types in an online learning environment and to present a more reliable evaluation method with teachers, students themselves, and fellow students as subjects of evaluation. This study is expected to contribute to cultivating students' digital literacy and being used as a more objective and systematic evaluation method in music subjects by suggesting appropriate evaluation methods in music education in an online environment. 이 논문은 온라인 환경에서의 음악 교과 온라인 평가 방안 설계를 목적으로 한다. 코로나 19 사태 이후로 교육 전반의 혁신이 가속화됨에 따라 음악 교과에서도 온라인 교육과 디지털 소양에 대한 강조는 날로 확대되어 가고 있다. 하지만 예기치 못하게 확대된 온라인 수업은 교사들의 수업과 평가에 관하여 여러 고민을 안겼다. 본 연구는 연주ㆍ감상ㆍ창작의 세 영역에서 활용할 수 있는 음악 교과 온라인 평가 방안 설계를 위해 문헌분석연구방법에 바탕하여 크게 4가지 연구의 과정을 거쳤다. 첫째, 선행 연구와 2022 개정 음악과 교육과정을 통해 교육평가의 이해, 다양한 교육평가 모형, 온라인 학습과 평가에 대해 알아보았다. 둘째, 음악 교과 온라인 학습에 적절한 평가 방안의 원리와 절차를 제시했다. 4가지 사항으로 이루어진 음악 교과 온라인 평가 방안의 원리와 8단계의 평가 절차를 설계하였다. 마지막으로, 앞서 서술한 음악 교과 온라인 평가 방안 절차를 통해 2022 개정 음악과 교육과정에서 제시한 연주⋅감상⋅창작 영역에 적용 예시를 제시하였다. 이를 통해 온라인 학습환경에서 다양한 평가 유형을 활용하고 교사, 학생 본인, 동료 학생을 평가의 주체로 한, 보다 신뢰성 있는 평가 방안을 제시할 수 있었다. 본 연구는 온라인 환경에서의 음악교육에서 적절한 평가 방안을 제시하여 학생들의 디지털 소양을 함양하고 음악 교과에서 보다 객관적이고 체계적인 평가 방안으로 활용되는 데 일조할 것으로 기대한다.

한방병원에 입원한 뇌졸중환자의 역학적 동향에 대한 임상적 관찰

김승은(Seung-Eun Kim),김도형(Do-Hyung Kim),고창남(Chang-Nam Ko),김용석(Yong-Suk Kim),박동원(Dong-Won Park),이경섭(Kyung-Sub Lee) 대한한의학회 2000 대한한의학회지 Vol.21 No.4

국내 수입 패션 멀티샵의 마케팅 전략(Ⅰ)

김승은(Seung Eun Kim),김선화(Sun Hwa Kim) 한국복식학회 2004 服飾 Vol.54 No.3

The study was done to provide domestic fashion multi-shops with basic infomation about the product and price strategies through an investigation the marketing strategies for domestic multi-shop dealt with imported product only. Data were collected from Interview with a buyer or a staff of marketing department of Domestic Fashion Multi-shop dealt with Imported Product only. Through the study, it was clarified that these multi-shops showed a tendency to compose of promising brands, brands set a high value on unique character or technique and brands of promising designer noticed at the main collection. And they also extened their lines as a total life style shop dealt with acccessory, shoes and home collection as well as clothing. Therefore, they had to analyze their target consumer`s life style and applied this to organization of product, brands or sizing. To maintain the balance of multi-shop they bought products keeping the balance between all the brands and didn`t lose variety of concept, it was demanded to develop new brands as well. Their distribution channels had to be planned by regional characteristic that could be accepted their target consumers.