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문유정 ( Yoo-jung Moon ),최지선 ( Ji-sun Choi ),강예원 ( Ye-won Kang ),황미라 ( Mi-ra Hwang ) 한국정보처리학회 2022 한국정보처리학회 학술대회논문집 Vol.29 No.2
마스크 착용의 보편화로 청각장애인들이 일상에서 소통하는데 어려움을 겪고 있다. 본 논문에서는 청각장애인들의 소통의 불편함을 줄여주기 위해 AR글래스를 활용한 수어 통역 애플케이션을 구현한다. 구현한 통역 애플리케이션은 STT를 활용해 텍스트를 지문자로 분리하여 수어 애니메이션을 AR글래스로 확인할 수 있다. 또한, AR 글래스를 활용해 대화 상대자와 눈을 마주 보며 원활한 소통을 할 수 있다.
양극성 장애 환자와 정상인에서 계절성의 양상과 관련 요인 탐색
최정미,백지현,김지선,최지선,노지혜,남희정,이동수,홍경수,Choi, Jungmi,Baek, Ji Hyun,Kim, Ji Sun,Choi, Ji Sun,Noh, Jihae,Nam, Hee Jung,Lee, Dongsoo,Hong, Kyung Sue 대한생물정신의학회 2010 생물정신의학 Vol.17 No.3
Objectives : Recurrence of mood episodes associated with a specific season has been described in various mood disorders. Seasonal change in mood and behavior as a lifetime trait is also observed in healthy individuals. This study aimed at comparing the lifetime trait of seasonal variations of mood and behavior between bipolar disorder patients and controls as well as investigating associated factors of seasonality. Methods : Subjects were ninety-four clinically stable patients with bipolar disorder and 188 age- and sex-matched healthy controls. Seasonality of mood and behavior was assessed retrospectively on lifetime basis using Seasonal Pattern Assessment Questionnaire(SPAQ). Results : The patient group showed a higher median global seasonality score(GSS) of SPAQ and a higher rate of seasonal affective disorder(SAD) compared to the control group(p < 0.0001). For subjects showing prominent seasonality, the seasonal symptom profile and seasonal pattern was similar in both patient and control groups. In addition to the diagnosis, female gender was shown to be a predictor of seasonality in the multiple linear regression analysis(p = 0.045). Conclusion : This study suggests that lifetime trait of seasonality may be related to the susceptibility of bipolar disorder.
한창화(Han, Chang-Hwa),최지선(Jung, Dae-Seung),정대승(Choi, Ji-Sun),한상훈(Han, Sang-Hun),이중희(Lee, Joong-Hee) 한국신재생에너지학회 2009 한국신재생에너지학회 학술대회논문집 Vol.2009 No.11
The performance of direct methanol fuel cells is affected by operating conditions such as, methanol feeding temperatures, methanol concentrations, and methanol flow rates during the operation in different environmental conditions. In this study, effects of the environmental temperature on performance of direct methanol fuel cells have been investigated in order to test a applicability of direct methanol fuel cell to the vehicle. The environmental temperature (ET) was varied from -20?C to +30?C. The inside fuel cell temperature (CT) during test at various operating conditions was monitored and the performance of fuel cell was measured in the I-V polarization curve. With increasing the ET, the performance of the fuel cell was significantly improved and the CT also almost linearly increased. However, at below 0?C ET, the DMFC showed very poor performance and needed to control CT or methanol feeding temperature (MFT), methanol flow rate(MFR) to obtain enough power of the vehicle.
Effects of Radiation on PS-b-PMMA Block Copolymer Micelles
Ji Sun Choi(최지선),Jin-Ju Eom(엄진주),Chan-Hee Jung(정찬희),Junhwa Shin(신준화) 한국고분자학회 2016 폴리머 Vol.40 No.4
본 연구의 목적은 다이옥산/메탄올 혼합물에서 형성된 PS-b-PMMA 블록공중합체 마이셀의 감마선에 대한 영향을 평가하는 것이다. DLS 측정결과, 감마선으로 조사된 마이셀은 PS 블록의 가교구조 형성으로 인해 PS와 PMMA 블록 모두에 용해도가 높은 톨루엔 용매에서 감마선으로 조사되지 않은 마이셀에 비해 안정성이 향상됨을 확인하였다. 또한 조사된 PS-b-PMMA 마이셀과 조사되지 않은 PS-b-PMMA 마이셀의 상대적 크기와 구조는 TEM을 이용하여 비교 관찰하였다. The purpose of this study is to investigate the effects of gamma-ray radiation on PS-b-PMMA block copolymer micelles formed in a mixture of dioxane/methanol. It was found by DLS measurement that the irradiated micelles were more stable in a good solvent (toluene) for both PS and PMMA blocks compared to non-irradiated micelles due to the cross-linking of PS blocks. TEM was used to observe and compare the relative size and structure of the PS-b-PMMA micelles before and after irradiation.
조병완,윤광원,박정훈,최지선,Jo, Byung-Wan,Yoon, Kwang-Won,Park, Jung-Hoon,Choi, Ji-Sun 한국전산구조공학회 2011 한국전산구조공학회논문집 Vol.24 No.4
과적차량은 도로관련 사회간접자본과 국가 경제적 측면, 교통류, 도로안전 등 다양한 측면에서 악영향을 미치고 있다. 이에 따라, 본 논문에서는 지능형 과적차량 단속시스템 개발을 위하여 유비쿼터스 센서네트워크(USN) 시스템을 구성하였다. 그리고 WIM(Weight-in-motion) 시스템과 달리 도로자체의 변형을 측정하여 주행중인 차량의 축을 감지한 후, 도로 하면에 부착된 변형률센서를 통하여 얻은 신호와 해석방법을 이용하여 차량의 중량을 계산하는 방안을 제시하였다. 또한 유전자알고리즘 기법의 차량하중 분석방법을 위한 시뮬레이션 실험을 실시하였고, USN구성을 위한 센서의 무선화 테스트를 실시하였다. Overload vehicles have demoralizing influence upon the social overhead capital, economics of nation, traffic flow and road safe as various components. Accordingly, this study established a ubiquitous sensor network system to develop an intelligent regulation system to monitor overloaded vehicles in motion. and Unlike WIM, after detecting the axle of driving vehicles by measuring deformation of roads, this system calculates the weights of vehicles by using signals from the strain sensors installed under the road and an analysis method. Also the study conducted an simulation test for vehicle load analysis using genetic algorithm. and tested wireless sensor for USN system.