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최승우(Choi, Seung-Woo),장정현(Jang, Jeong-Hyun),이종희(Lee, Jong-Hui),현창협(Hyeon, Chang-Hyeop),심재일(Sim, Jae-Il),최재혁(Choi, Jae-Hyouk) 대한건축학회 2017 대한건축학회 학술발표대회 논문집 Vol.37 No.2
In order to examine hysteresis behavior of the brace-type frictional damper, cyclic loading test were carried out. The brace-type friction damper consists of a brace part and a friction damper part to prevent buckling occurring in the brace structure. In the test of the amplitude input waveform, the friction dampers showed stable hysteresis behavior from the 1-cycle to the last 15-cycle, and sufficient energy dissipation occurred. It has been shown that a constant level of frictional strength is secured during three times of the cyclic loading test in the incremental amplitude input waveform and the brace type friction damper can be reused only by replacing the friction material after the earthquake.
인터넷 동영상 인스트림 광고 유형에 따른 광고 회피에 대한 연구
최승우(Choi, Seung Woo),박보람(Park, Bo Ram) 한국디자인문화학회 2015 한국디자인문화학회지 Vol.21 No.3
본 연구는 인터넷 동영상 서비스 이용자들이 동영상 시청 전이나 시청 도중에 동영상 인스트림 광고를 접했을 때, 동영상 인스트림 광고 유형에 따라 어떠한 광고 회피를 보이는지를 살펴봄으로써 동영상 인스트림 광고 유형에 따른 광고 회피 양상을 확인하고, 동영상 인스트림 광고의 활용을 위한 방안을 모색하기 위하여 시행되었다. 세부적으로 유튜브 동영상 인스트림 광고 중 동영상 디스플레이에 나타나 직, 간접적으로 동영상 시청에 간섭하는 세 가지 광고 유형(건너뛸 수 없는 동영상 광고와 건너뛸 수 있는 동영상 광고, 오버레이 광고)에 대한 유튜브 이용자들의 광고회피를 알아보도록 한다. 본 연구의 조사방법으로 기술조사의 횡단조사 중 서베이조사에 의한 표본조사를 하였다. 구글 설문지를 통하여 웹 설문에 참여하게 하는 방식을 취하였고, 본 연구의 조사 대상은 전국 소재의 10대~30대 남녀를 선정하였으며, 총 152명이 설문에 참여하였다. 인터넷 동영상 서비스의 사용 연령대를 고려하여 30대 이하의 연령대를 대상으로 선정하였으며, 총 152명이 설문에 참여하였다. 연구 결과, 유튜브 이용자들은 광고에 노출되면 스킵버튼을 누르는 기계적 회피 행동을 가장 많이 하고, 다음으로 광고에 주의를 기울이지 않는 인지적 회피를 하며, 마지막으로 광고를 보지 않거나 다른 행동을 하는 물리적 회피를 가장 적게 한다는 것을 알 수 있었다. 그리고 세 가지 광고 유형에 따라 다른 광고 회피 유형이 나타남을 확인할 수 있었다. 기계적 회피가 가능한 건너 뛸 수 있는 동영상 광고와 오버레이 광고의 경우에 높은 기계적 회피를 확인할 수 있었고, 기계적 회피가 불가능한 건너뛸 수 없는 동영상 광고의 경우에 인지적 회피가 물리적 회피보다 높은 수치를 기록함을 알 수 있었다. 이는 대부분 유튜브 이용자가 광고를 스킵하고 있으며 스킵할 수 없을 때 광고에 집중하지 않고 있다는 것을 알 수 있었다. This research investigates the current status of advertisement avoidance of digital video in-stream ads for providing understanding of digital video in-stream ads and effective method of Using digital video ads. Especially we analyzed Advertisement Avoidance in three different formats of digital video ads: skippable in stream ad, Non-skippable in-stream ad, overlay ad which appears before, during and after internet videos and delays or interrupt the video. This research examines the current tendency of advertisement avoidance of digital video in-stream ads. For the research method, This research used sample survey which is part of the cross sectional analysis. This research made google web survey for collecting the responds of the people. A survey of 152 respondents found that Youtube users are most likely to act mechanical avoidance by pressing the skip button and cognitive avoidance, which is not paying attention to the ads consciously is followed by mechanical avoidance. the fewest people do physical avoidance. and this research also found that the types of advertisement avoidance are different according to types of digital in-stream video advertisement. Mechanical avoidance most usually happen when user faces skippable ads and overlay ads. Cognitive avoidance got higher level than physical avoidance when user can’t avoid ads mechanically. This result shows that most Youtube user avoid ads mechanically and if they could not do mechanical avoidance, they do not paying attention the ads consciously.
코눈물관폐쇄 수술 환자에서 눈물주머니누석의 임상병리학적 연구
최승우(Seung Woo Choi),박종서(Jong Seo Park),권아영(A Young Kwon),유혜린(Helen Lew) 대한안과학회 2016 대한안과학회지 Vol.57 No.1
Purpose: To evaluate the correlation between clinical manifestation of patients with nasolacrimal duct obstruction and pathological characteristics of lacrimal sac and dacryolith found during endoscopic dacryocystorhinostomy. Methods: This retrospective study included 158 patients (189 eyes) who received endoscopic dacryocystorhinostomy. We defined lacrimal dacryolith by gross discovery in the lacrimal sac during surgery or findings during pathological examination as dacryolith or calcification, including size and distribution in pathology slides. We correlated the relationship between the patients’ clinical manifestations, surgical results, lacrimal sac's pathological findings including calcification, inflammation and fibrosis, and pathological findings of lacrimal sac dacryolith. Results: Dacryolith was found in 61 eyes (32.3%) and among them, grossly found in 13 eyes (6.9%). Dacryolith's filling defect on dacryocystography was found in 17 eyes (9.0%) and based on grossly found dacryolith, dacryocystography's sensitivity and specificity were 58.8% and 1.7%, respectively. The average size of dacryolith was 0.3 ± 0.8 mm2 with an average distribution of 20.1 ± 17.9%. Distribution of dacryolith and the proportions of inflammatory cells and fibrosis in the lacrimal sac were negatively correlated(p < 0.05). The size of dacryolith and the proportions of fibrosis in the lacrimal sac were also negatively correlated (p = 0.008). In cases where the proportion of calcification in pathology slides was over 50%, the duration of symptoms in the calcification-dominant group was shorter than in other groups (p = 0.006). The success rates of endoscopic dacryocystorhinostomy with dacryolith and without dacryolith were 91.8% and 80.5%, respectively (p = 0.046). Conclusions: The patients with lacrimal sac dacryolith in nasolacrimal duct obstruction showed shorter duration of symptoms, lower fibrosis of lacrimal sac, and higher surgical success rates than the other cases. Therefore, additional research may be necessary to determine the mechanism of dacryolith formation and early treatment in nasolacrimal duct obstruction with lacrimal sac dacryolith.
FaceReader를 활용한 초등학생의 과학적 긍정 감성 지수 산출식 개발 - 생명과학 동영상을 중심으로 -
최승우 ( Seung Woo Choi ),신동훈 ( Dong Hoon Shin ) 韓國生物敎育學會 2017 생물교육 Vol.45 No.2
The purpose of this study is to measure the emotional changes that occur when the elementary school students feel scientific emotions in the life science video, and develop a calculating formula based on this. For this purpose, were selected life science video suitable for ele-mentary school students and were extracted six stimulations from the questionnaire that could produce scientific emotions. Based on extracted stimulation, a task was created to use with the experiments. The subjects of this study were twenty two students from third grade who agreed to participate in the research. The extracted video was presented, and when students watched the clip their facial expressions were re-corded and their emotion were analyzed. At the same time, scientific emotions were measured as questionnaire. Noldus` FaceReader 6.1 program was used to measure and analyze the change in emotions that appeared in the facial expression. A regression analysis was conducted to explore the relationship between scientific positive emotion and facial expressions. As a result, when facial expressions showed surprised and happy was high, scientific positive emotions appeared and it was significant. Based on this, the FaceReader program has developed calculating formula for identifying scientific po-sitive emotions.