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Quasi-isotropic 적층 보강재로 보강된 RC보의 휨 보강 설계에 관한 연구
지효선 ( Ji¸ Hyo-seon ) 한국복합신소재구조학회 2021 복합신소재구조학회논문집 Vol.12 No.5
본 논문은 준등방성 적층 섬유배열된 FRP보강재로 보강된 철근콘크리트보의 휨 보강 설계에 대하여 소개하고 있다. 본 논문에서는 첫 번째로 FRP보강재의 적층설계와 그 적층부재의 물성값 해석이 수행되었다. 마지막으로 여러 개의 준등방성 적층구조로 보강된 철근콘크리트보에 대한 휨 해석이 수행되었다. 그 결과값은 직교차 적층 구조를 갖는 RC보와 비교되었다. 따라서 본 연구가 준등방성 적층구조의 FRP보강재로 보강된 노후 RC보의 휨 설계의 지침서가 될 수 있을 것이다. This study presents the flexural design for deteriorated reinforced concrete beams strengthened with quasi-isotropic laminate structures’ fiber-reinforced polymer (FRP) reinforcements. First, the laminates for FRP reinforcements were designed and then their properties were analyzed. The flexural analysis demonstrated that the reinforced concrete (RC) beams strengthened with FRP reinforcements of several quasi-isotropic laminate structures prevented the coupling effect of the FRP reinforcements in this study. The results were analyzed and compared with the RC beams strengthened with cross-ply laminate structures. Thus, this study can serve as a flexural design guideline for RC beams strengthened with the FRP reinforcements of quasi-isotropic laminate structures.
Covert Performance Simulations Influence Aesthetic Appreciation of Music
( Hyoseon Lee ),( Hyunjin Song ),( Young Woo Sohn ) 한국감성과학회 2015 추계학술대회 Vol.2015 No.-
Simple hand movements can change appreciation of music. The present experiments investigate whether aesthetic pleasure people get from appreciating music can be enhanced or interfered with by simultaneously performing hand movements that either resemble or do not resemble the movements the performer made while creating the music. In Experiment 1, participants moved their hand in a way that either matched or did not match the movements of the performer while listening to classical music either performed by violin or piano and rated their liking of each musical excerpts. Participants preferred the music when their hand movements matched the movements of the performer. We confirmed the results of Experiment 1 by using simpler musical stimuli in Experiment 2. In Experiment 3, participants were presented with pairings of musical excerpts and paintings of pointillist-style or stroke-style. Participants preferred the musical excerpts when the brushstrokes of the painting presented with the music matched the movements required to produce the music. Together, these results illustrate that while listening to music, movements to play corresponding musical instruments are involuntarily and covertly simulated within the audience’s motor system, thus aesthetic appreciation of the music can be manipulated by facilitating or interrupting such performance simulation.
Exploring Digital Text Reading Patterns: An Application of Eye-tracking Method
( Hyoseon Choi ),( Ilju Rha ) 한국교육공학회 2016 한국교육공학회 학술대회발표자료집 Vol.2016 No.1
On the part of learners, digital learning materials or digital texts which often include a mixture of text, photographs, drawings, maps and other graphic images may require different reading strategies and mental processing compared with studying with analog texts. There has been little research reported on patterns of reading digital texts. The present study aimed to explore learners`` digital text reading patterns when the same text appears along with three different types of images: necessary, relevant, and decorative images. Participants of the study were 24 undergraduate students. Their eye movements were recorded using an eye-tracker when the participants were reading the three different types of digital texts. The eye movement patterns were analyzed, classified and conceptualized by three coders. As a result, four reading patterns were identified: context recognition, content comprehension, content summarization, and non-utilization of graphics. These reading patterns were strategically applied to digital text reading regardless of the image type. The study concluded with a set of recommendations for further research on digital text reading and practical guidelines for instructional designers of digital learning materials.
( Hyoseon Choi ),( Sunghye Lee ),( Yoojung Chae ),( Hyejin Park ) 한국교육공학회 2018 Educational Technology International Vol.19 No.1
It is crucial to understand the characteristics of learner questioning due to the effects it has on learning. This study focuses on the effects of middle school students questioning on their academic achievement in an online inquiry learning environment. A survey of 827 middle school students was conducted; the students took part in an online math and science program offered by a center for the gifted. Throughout the survey, learner questioning was analyzed, and its correlation with academic achievement was investigated. An analysis was based on questioning categories of a low- and high-level questions from previous studies. Through the survey, it was found that the number of learner questions asked in the online environment was small, but the number of low- and high-level questions were almost equal. Secondly, the higher the academic achievement level of the student, the higher the possibility they would ask either low- or high-level questions. Lastly the group of students in both low- and high-levels of questioning earned the highest average scores on formative evaluations and inquiry tasks. This indicates that regardless of the level of questions, the act of questioning itself is highly related to the academic achievement. However, in the case of advanced learning projects, the quality of questioning and high-level questioning affected the academic achievement of students. Based on these results, implications for the encouragement of learner questioning and support for asking high-level question are suggested.
Hyoseon Jeong,현정희,이연경 질병관리본부 2023 Osong Public Health and Research Persptectives Vol.14 No.4
Objectives: We aimed to describe the epidemiological characteristics of carbapenemase-producing Enterobacteriaceae (CPE) outbreaks in healthcare settings in the Republic of Korea between 2017 and 2022.Methods: Under the national notifiable disease surveillance system, we obtained annual descriptive statistics regarding the isolated species, carbapenemase genotype, healthcare facility type, outbreak location and duration, and number of patients affected and recommended interventions. We used epidemiological investigation reports on CPE outbreaks reported to Korea Disease Control and Prevention Agency from June 2017 to September 2022.Results: Among the 168 reports analyzed, Klebsiella pneumoniae (85.1%) was the most frequently reported species, while K. pneumoniae carbapenemase (KPC, 82.7%) was the most common carbapenemase genotype. Both categories increased from 2017 to 2022 (p<0.01). General hospitals had the highest proportion (54.8%), while tertiary general hospitals demonstrated a decreasing trend (p<0.01). The largest proportion of outbreaks occurred exclusively in intensive care units (ICUs, 44.0%), and the frequency of concurrent outbreaks in ICUs and general wards increased over time (p<0.01). The median outbreak duration rose from 43.5 days before the coronavirus disease 2019 (COVID-19) pandemic (2017–2019) to 79.5 days during the pandemic (2020–2022) (p=0.01), and the median number of patients associated with each outbreak increased from 5.0 to 6.0 (p=0.03). Frequently recommended interventions included employee education (38.1%), and 3 or more measures were proposed for 45.2% of outbreaks.Conclusion: In the Republic of Korea, CPE outbreaks have been consistently dominated by K. pneumoniae and KPC. The size of these outbreaks increased during the COVID-19 pandemic. Our findings highlight the need for continuing efforts to control CPE outbreaks using a multimodal approach, while considering their epidemiology.
( Hyoseon Lee ) 서암순창장학회 2017 Journal of Marketing Thought Vol.3 No.4
For a long time, firms have tried to cultivate trust and have depended on it to succeed. In particular, many previous studies have identified several situations where trust serves as a major resources or convertible asset of a corporation. In line with previous studies, we investigate what may be a significant variable in a channel and pose the following question: when and to whom does trust have a positive effect? Our research considers organizational culture as key moderator and tries to see the interaction among trust, technological turbulence, and organizational culture. The expected results are that when a firm has a tendency for a high aversion to risk, the effect of technological turbulence on the relationship between trust and market performance will alleviate than when a firm has a tendency of low risk aversive culture, this study not only expands research areas to cross-cultural studies but also proposes further research suggestions.