2D van der Waals Materials-based Suspended Device for Multi-Functional Sensor Applications

Si Eun Yu,Young Tack Lee 한국차세대컴퓨팅학회 2022 한국차세대컴퓨팅학회 학술대회 Vol.2022 No.10

Drowsy driving and leakage of toxic gas are vital problems in vehicle usage. Therefore, multi-functional high-performance sensors are needed to solve these problems and provide warning information to the driver as well. In this paper, we demonstrate sensor devices with a suspended structure to detect subtle environmental changes such as acoustic waves or toxic gases. Our suspended 2D TMDC channel enables us to measure the environmental changes within electrical signals to achieve real-time detection, high sensitivity, and reliability.

이소자키 아라타 건축에 나타난 구축성의 표현특성 연구

유시은 ( Si Eun Yu ),윤재은 ( Jae Eun Yoon ) 한국공간디자인학회 2019 한국공간디자인학회논문집 Vol.14 No.7

(연구배경 및 목적) 이소자키 아라타는 본인이 살아온 시대에 나타난 다양한 건축 이념을 수용하며 본인만의 건축을 시도하는 건축가로 사람들이 알고 있다. 본 연구에서는 이소자키 아라타의 건축을 알릴 수 있던 1960년대부터 지금에 이르기까지의 건축을 통하여 그의 작품에 나타난 구축성에 관해 연구해보고자 한다. (연구방법) 첫 번째 그의 건축 배경과 건축 특성을 이해하며, 두 번째로 구축성의 정의를 시대별로 파악 후 구축성이 나타난 공간 표현 방법에 대해 조사하여 알아보고자 한다. 세 번째로 선행연구를 바탕으로 도출된 구축성을 기초로 이소자키 아라타 건축 공간에 나타난 구축성의 표현 특성에 대한 특징을 파악한다. 마지막으로 도출한 구축요소를 기준으로 이소자키 아라타 건축에 나타나는 구축성의 특징을 정립하고자 한다. 연구의 범위는 1960년부터 현재까지 알려진 건축물 중 프리츠커 수상 목록에 나와 있는 건축물을 중심으로 범위를 한정하였으며, 4가지의 대표사례를 선정하고자 한다. (결과) 구축성의 개념을 파악하고 도출하기 위하여 다른 건축가들의 작품을 통해 나와 있는 구축성을 중심으로 분석을 진행하였다. 선행연구를 통하여 구축성의 공간 표현 방법을 나누어 기준으로 잡았으며 분석을 통해 그의 건축에서는 선행연구를 통해 나누었던 구축성의 장소성과 시간성, 그리고 맥락적 구축성을 확인할 수 있다. (결론) 이상의 연구를 통하여 이소자키 아라타 건축에 구축성이 나타나고 있었고, 따라서 그의 건축에서 나타난 구축성은 3가지로 나타나는 것을 확인할 수 있었다. 첫 번째로 빛이라는 비물질성을 통하여 시간이 지남에 따라 달라지는 건축을 통해 시간성을 표현하고자 함을 알수 있다. 두 번째로 재료라는 물성을 통하여 지역적 측면과 건축물이 만들어진 공간, 대지를 통하여 지역적 측면 또한 활용하여 장소성이라는 구축성의 공간 표현 방법을 나타내었다. 세 번째로 건물 축조 시 전통 방식을 통하여 건물을 짓는 전통적인 측면과 변형된 재료를 사용하여 전통적 방법과 함께 사용하는 절충적 측면을 확인할 수 있었다. 이상으로 본 연구의 내용이 이후 이소자키 아라타의 건축을 통해 나타나는 구축적인 측면이 활성화 되는 적용 방안으로 쓰일 뿐만 아니라 다양하고 지속적인 분석을 통하여 연구가 보다 더 나아가길 바란다. (Background and Purpose) Isozaki Arata is known to people as an architect who tries to build his own, embracing various architectural ideologies that emerged from his own time. In this study, we would like to study the constructiveness of Isozaki Arata through his first work from the 1960s to the present. (Method) First, I understand his architectural background, architectural characteristics, and architectural ideas, and second, I want to understand the definition of tectonic by period, and then examine how it is expressed in space. Thirdly, through prior study, we analyze and derive how the architectural elements were shown in the works, and based on the construction elements derived from them, we identify the characteristics of the representational characteristics of the tectonic in the Isozaki Arata architectural space. Based on the last elements derived, Isozaki Arata's architectural characteristics are to be defined. The scope of the study was limited to those buildings from 1960 to the present, which were listed on the Pritzker Award List, and four representative examples were chosen. (Results) The analysis was conducted with the focus on the tectonic presented through the works of other architects in order to identify and derive the concept of tectonic. The method of expressing the space of the tectonic was divided by the prior study, and the analysis confirms the place, time and contextual tectonic of the tectonic that was divided through the prior study in his architecture. (Conclusions) Through the above study, tectonic appeared in Isozaki Arata architecture, and it was therefore possible to see that there were three kinds of constructs that appeared in his architecture. First of all, through the non-materiality of light, we can see that through architecture that varies over time, we want to express the timeliness through the atmosphere that changes the location of shadows or the inflow of light. Second, the method of expressing the space of tectonic, which is place, was utilized by the regional aspects through the material properties, the space where the buildings were made, and the local aspects through the material Finally, the traditional aspects of building construction and the trade-off aspects used with the traditional methods were identified through the traditional methods of building construction. Above all, we hope that the contents of this study will not only be used as an application method to activate the architectural aspects of Isozaki Arata, but also to further the research through various and continuous analyses.

Effect of Exam Anxiety, Academic Stress and Alcohol Dependence on Academic Achievement of Nursing Students1

Jo-Eun YU,Mi-Young SON,Yeo-Myung YOON,Eun-Seo AN,Si-Eun YU,Jeong-Eun YOO,이도영 한국웰빙융합학회 2023 웰빙융합연구 Vol.6 No.4

Purpose: The purpose of this study is that the college age is an important transition period from youth to adulthood. Nursing students are unfamiliar with their field of study and need to adapt to a large amount of academic and practical training, so that they can have a better college life. An attempt was made to determine the effect of exam anxiety, academic stress, and alcohol dependence on the academic achievement of nursing students. Research design, data, and methodology: The subjects of the study were 130 students from all grades who agreed to participate in the study after expressing convenience among students attending the Department of Nursing at a university in Gyeongnam. The data collection period was from August 15 to September 15, 2023. It was about a month. The data investigation was conducted through a self-report survey. Results: Results showed that significant variables included exam anxiety, academic stress, alcohol dependency, parent relationships, peer relationships, and major satisfaction, explaining a total variance of 31.9%. Among these, the most influential factor was academic stress (β=-.352). Conclusions: This study identify factors influencing the academic achievement of nursing college students and hopes to contribute to formulating strategies for their growth and competence development.

Epidemiologic and clinical study of cholinergic urticaria for the recent 10 years

( Jung Eun Kim ),( Hyun Ju Yu ),( Do Hyun Lee ),( Young Sun Eun ),( Young Min Park ),( Hyun Jeong Park ),( Dong Su Yu ),( Hoon Kang ),( Sang Hyun Cho ),( Chul Jong Park ),( Si Yong Kim ),( Jun Young L 대한피부과학회 2012 대한피부과학회 학술발표대회집 Vol.64 No.3

용도지역에 따른 도시형생활주택의 거주자 특성과 주거만족도 분석

유시은(Yu, Si-Eun),양승우(Yang, Seung-Woo) 한국도시설계학회 2013 도시설계 : 한국도시설계학회지 Vol.14 No.4

본 연구는 서울 관악구 지역을 대상으로 제2종 일반주거지역과 일반상업지역 내 도시형생활주택 거주자의 특성과 주거만족도를 비교하고, 주거만족도에 영향을 미치는 요인을 분석하였다. 연구 결과를 세 가지로 정리할 수 있다. 첫째, 거주자의 특성은 통근시 교통수단 외에 지역별로 큰 차이가 없었으며 주요 특성으로 직장인이 71.3%지만, 자동차는 28.9%만이 소유하고 있었다. 둘째, 주거만족도를 안전성, 쾌적성, 입지적 편리성, 물리적 편리성, 경제성의 5개 항목으로 비교한 결과 쾌적성과 경제성에서는 제2종 일반주거지역이, 입지적 편리성에서는 일반상업지역이 높은 만족도를 보였다. 셋째, 종합주거만족도에 영향을 미치는 요소는 제2종 일반주거지역의 경우 경제성, 안전성 순으로, 일반상업지역은 쾌적성, 입지적 편리성 순으로 분석되었다. 용도지역에 따라 주거만족도에 영향을 미치는 요인이 다르게 나타나므로, 전반적인 만족도 제고를 위해서 제2종 일반주거지역은 안전성과 사용자의 지불능력 등을 고려하고, 일반상업지역에서는 쾌적성과 입지적 편리성을 고려하여 계획하여야 할 것이다. 이러한 결과는 향후 도시형생활주택의 정책 제안과 설계에 기초자료로 활용할 수 있을 것이다. The purpose of this study is to compare the characteristics and residential satisfaction level of the residents between 2nd Residential District and General Commercial District in Gwanak-Gu, Seoul and to analyze the influential factors on general residential satisfaction. Followings have been identified: First, there is no significant difference on the residents? characteristics between these two districts except commuting transportation factor. The 71.3% of the residents are office workers while the 28.9% of the residents own cars. Secondly, satisfaction level of amenity and economic factor in 2nd Residential District and that of location convenience factor in General Commercial District was higher than the other district. Thirdly, in terms of general residential satisfaction, economic factor was more influential than safety factor in 2nd Residential District, while amenity factor has greater effect on the satisfaction level than location convenience factor in General Commercial District. The result of residential satisfaction level may be utilized as preliminary basis for policy proposal and design for urban life?s housing.

저전력 구동 및 이상적인 Subthreshold Swing (SS) 값 확보를 위한 JFET-MISFET Hybrid FET

유시은(Si Eun Yu),이영택(Young Tack Lee) 대한전자공학회 2023 대한전자공학회 학술대회 Vol.2023 No.6

Evaluation of two different enzyme-linked immunosorbent assay for severe fever with thrombocytopenia syndrome virus diagnosis

Yu, Min-Ah,Jeong, Hye Won,Park, Su-Jin,Kim, Young-Il,Kwon, Hyeok-Il,Kim, Eun-Ha,Si, Young-Jae,Yu, Kwang Min,Robles, Norbert John,Han, Hae Jung,Choi, Young Ki 대한백신학회 2018 Clinical and Experimental Vaccine Research Vol.6 No.1

<P>To develop the large scale serological assay for severe fever with thrombocytopenia syndrome virus (SFTSV) infection, we evaluated two different enzyme-linked immunosorbent assay (ELISA) methods using nucleocapsid protein (NP) and Gn proteins of CB1 (genotype B) SFTSV strains. The NP-based ELISA tests showed more sensitive with broad cross-reactivity between two different genotype A and B strains compared with those of Gn-based ELISA tests. However, Gn-based ELISA showed more genotype specificity and specificity. These result suggested that NP-based ELISA test could be applicable for general sero-prevalence studies of SFTSV infections, while Gn-based ELISA could be applicable for a certain specific genotype sero-prevalence study.</P>

차나무와 동백나무 꽃잎 혼합 추출물이 HT29 세포주의 성장 억제 및 세포자살에 미치는 효과

Si Young Lee,Myoung Gun Choung,Hannah Lee,Eun Ji Go,Chang Yeon Yu,Jung Dae Lim 한국약용작물학회 2017 한국약용작물학술대회 발표집 Vol.2017 No.05

Backgrounds : The action mechanisms of several chemopreventive agents derived from herbal medicine and edible plants have become attractive issues in cancer research. Tea is the most widely consumed beverage worldwide. It have been demonstrated that the active principles of tea sources such as flower extract Camellia sinensis (CSF) and Camellia japonica (CJF)were attributed to their tea polyphenols. We focused on investigating CSF, CJF, mixtures of CSF and CJF has been proven to suppress colonic tumorigenesis. Methods and Results : In this study, human colorectal carcinoma HT-29 cells were treated with CSF, CJF, mixture of CSF and CJF to examine the anti-proliferative and pro-apoptotic effects of mixture of CSF and CJF (3 : 1), as well as the molecular mechanism underlying these effects. Cell viability assay, nuclear staining, DNA fragmentation, caspase assay, cytochrome c release, were utilized to dissect the signaling pathways. In mixture of CSF and CJF (3 : 1), CSF appeared most anticancer effect by both MTT assays and the cleavage analysis of apoptosis-related molecules and PARP. Interestingly, we found that CJF make it possible to express the apotosis inducing by CSF in a short time and apoptosis effect of CSF maintained sustainable. Conclusion : In summary, our results from this study suggest that in HT-29 human colon cancer cells (i) CSF treatment causes damage to mitochondria, and (ii) CJF contributed CSF induced apoptotic cell death mediates cytochrome C release, (ⅲ) mixture of CSF and CJF (3 : 1) the potential to function as a chemopreventive agent against colon cancer.

Flower Extract Mixture of Camellia japonica and Camellia sinensis Inhibit Cell Growth and Induces Apoptosis in HT29 Human Colon Cancer Cells

Si Young Lee(이시영),Myoung Gun Choung(정명근),Hannah Lee(이한나),Eun Ji Go(고은지),Chang Yeon Yu(유창연),Jung Dae Lim(임정대) 한국약용작물학회 2017 한국약용작물학회 학술대회논문집 Vol.2017 No.1

Anti-Obesity Effects of Anthocyanin Rich and Flavonoid Rich Fractions from Mulberry in C57BL/6 Mice Model

Si Young Lee(이시영),Hannah Lee(이한나),Eun Ji Go(고은지),Myoung Gun Choung(정명근),Hyun Bok Kim(김현복),Ae Jung Kim(김애정),Min Ju Kim(김민주),Ill Min Chung(정일민),Chang Yeon Yu(유창연),Jung Dae Lim(임정대) 한국약용작물학회 2017 한국약용작물학회 학술대회논문집 Vol.2017 No.2