메타버스의 수업활용에 관한 사용자 경험 분석 - 스페이셜(Spatial)을 중심으로 -

이예진,정광태,Lee, Yejin,Jung, Kwang-Tae 한국실천공학교육학회 2022 실천공학교육논문지 Vol.14 No.2

In this study, the user experience was analyzed from the learner's point of view, focusing on the metaverse platform 'Spatial'. SUS(System Usability Scale) was used to evaluate the usability of the metaverse platform 'Spatial' in a college class, and the Magnitude estimation technique was used to evaluate the immersion and satisfaction with the class. In addition, a questionnaire survey was used to collect user experience opinions on the use of 'Spatial' as a teaching tool. Looking at the usability evaluation results of the 'Spatial' system, the students evaluated the usability, immersion, and satisfaction quite positively. Looking at the user experience of metaverse platform 'Spatial', it was found that students highly valued Metaverse as an educational tool that can provide a place for many people to gather and communicate even in a non-face-to-face space. Compared to other online platforms, metaverse has advantages in ease of use, interaction, immersion, and interest. In particular, in addition to keyboard, touch, and display, interaction using the five senses such as voice, motion, and gaze was recognized as a great advantage. On the other hand, it was found that high openness, freedom, and interest factors can both promote learning and inhibit learning. Nevertheless, it is judged that the metaverse platform 'Spatial' can be effectively applied in college classes because it enables various interactions between instructor and learner or between learner and learner.

청소년의 공격성에 영향을 미치는 요인: 개인·부모·친구 요인과 소셜네트워크서비스(SNS) 이용 정도를 중심으로

이예진(Yejin Lee),김경범(Kyong-Beom Kim),허민희(Min-Hee Heo),노진원(Jin-Won Noh),임유미(Yu-Mi Im) 한국콘텐츠학회 2021 한국콘텐츠학회논문지 Vol.21 No.4

본 연구는 청소년의 공격성에 영향을 미치는 요인을 개인·부모·친구 요인과 SNS 이용 정도를 중심으로 하여 탐색하고자 한다. 자아형성이 불안정한 청소년기의 성장기적 특성을 감안하여, 주요 주변인인 부모와 친구 관계를 중심으로 청소년 공격성 문제 개선을 위한 근거를 제공하는 것을 목적으로 한다. 이를 위해 한국아동·청소년패널조사 초1패널의 7차년도 데이터 중 총 1,437명의 자료를 활용하여, 빈도분석, t-test, 일원배치 분산분석(ANOVA), 다중선형회귀분석을 실시하였다. 그 결과, SNS를 자주 이용하는 학생이 적게 이용하는 학생보다 공격성이 높은 것으로 나타났다. 부모 요인 중 학대가 심할수록, 과잉간섭이 심할수록 공격성이 높은 것으로 나타났으며, 감독은 높을수록 공격성이 낮은 것으로 나타났다. 또한 친구 요인 중 소외를 높게 경험할수록 공격성이 높은 것으로 나타났다. 청소년의 공격성으로 인해 발생하는 문제의 개선을 위하여 단순히 청소년의 SNS 사용을 제한하는 것이 아니라, 가장 영향력이 높은 주변인인 부모와 친구의 관계를 고려한 통합적인 프로그램의 마련이 필요하다. This study aims to identify the effects of factors on aggression in adolescents, focusing on the individual, parent, friend factors and SNS usage. In particular, this study is to provide a basis for easing aggression in adolescence by considering the emotional relationship of parents and friends. This study analyzed frequency, t-test, one-way batch distribution analysis(ANOVA), and multi-linear regression, using the data from the 7th year of the Korean Children and Youth Panel Survey. As a result, adolescents who frequently use SNS are more aggressive than adolescents who use less. Among the parental factors, the more abuse and excessive interference were found to be more aggressive, and the higher the coach, the lower the aggressiveness. Furthermore, among the friend factors, it has been shown that the higher the alienation, the more aggressive adolescents are. In order to reduce aggression among adolescents, it is necessary to prepare an integrated program considering the emotional relationship of parents and friends, who are the most influential neighbors, rather than simply restricting the use of SNS.

실란 커플링제 프로필트리메톡시실란에 의해 표면 개질된 CaCO₃ 나노입자가 에멀젼과 기포 안정성에 미치는 영향에 관한 연구

이예진 ( Yejin Lee ),박기호 ( Kiho Park ),임종주 ( Jongchoo Lim ) 한국공업화학회 2020 공업화학 Vol.31 No.1

본 연구에서는 실란 커플링제 프로필트리메톡시실란(propyltrimethoxysilane, PTMS)을 사용하여 CaCO₃ 나노입자의 표면을 개질하였으며, 개질된 CaCO₃ 나노입자를 에멀젼 유화제 및 기포 안정화제로의 적용 가능성을 시험하고자 나노입자 표면의 소수성 변화가 기포와 에멀젼의 안정성에 미치는 영향에 관하여 살펴보았다. PTMS에 의한 CaCO₃ 나노입자의 표면 개질은 FT-IR, TGA, DSC 분석을 통하여 확인하였으며, XRD 및 XPS 분석을 통하여 나노입자 표면의 원소 분석을 실행하였다. 또한 부상 시험과 접촉각 측정을 통하여 PTMS 농도가 CaCO₃ 나노입자의 표면 개질에 미치는 영향에 관하여 살펴보았다. In this study, surface modification of CaCO₃ nanoparticles by a silane coupling agent propyltrimethoxysilane (PTMS) was conducted and the effect of surface hydrophobicity on the stability of foam and emulsion was studied in order to test the potential applicability as a foam stabilizer or an emulsifier. The surface modification of CaCO₃ nanoparticles by PTMS was confirmed by FT-IR, DSC and TGA analysis. The atomic concentration of CaCO₃ particle surface treated by PTMS has been also identified by using XRD and XPS analyses. Both floating tests and contact angle measurements were also performed to examine the effect of PTMS concentration on the surface modification of CaCO₃ nanoparticles.

잡음 환경에서 음성 인식 정확도 향상을 위한 잡음 제거 알고리즘의 성능평가

이예진(Yejin Lee),손명진(Myungjin Son),김주희(Juhee Kim),변성우(SungWoo Byun),이석필(Seokpil Lee) 대한전기학회 2020 정보 및 제어 심포지엄 논문집 Vol.2020 No.10

2D 패턴 축소율과 신축성 소재 특성이 3D 의복 변형에 미치는 영향

이예진(Yejin Lee),이병철(Byungcheol Lee) 한국생활환경학회 2012 한국생활환경학회지 Vol.19 No.2

2D pattern-making of stretch clothing is difficult because different elongations of fabrics on a 3D body make various clothing deformations which lead to change in original design and function of the clothing. Therefore, quantitative analysis of relations between 2D pattern and clothing deformation on a 3D body is an important topic of interest both for industry and academia. In this study, the effects of 2D pattern reduction rate and fabric elasticity were investigated by measuring how the points on a 2D pattern are correlated with the location change of the points on a 3D female dress form. 14 different sample trousers were tested with two different kinds of fabrics. The reference sample trousers have no ease allowance, and the other samples were made with different grading reduction rate based on the reference. The reduction rate was varied from 10 to 20% in the width direction and from 5 to 15% in the length direction. Representative points were selected in the 2D pattern and location changes of the points on a 3D dress form were measured. The correlations between 2D and 3D coordinates were analyzed by monitoring the location change of each point. The reduction of 2D pattern leads to different position change on the 3D dress form and the influences of pattern reduction rate is much higher than that of fabric property. Comparing to the width direction, the reduction rate of length direction shows much higher correlation along the length direction.

세밀한 객체 인식을 위한 자기 지도 학습 모델의 전이 학습

이예진(Yejin Lee),황상흠(Sangheum Hwang) 한국정보과학회 2022 한국정보과학회 학술발표논문집 Vol.2022 No.06

Orthogonal Time Frequency Space 시스템의 다이버시티 분석

이예진(Yejin Lee),정해준(Haejoon Jung),신현동(Hyundong Shin) 한국통신학회 2023 한국통신학회 학술대회논문집 Vol.2023 No.6

의료영상 분할 모델의 도메인 일반화 성능 향상을 위한 자기 지도 학습의 활용

이예진(Yejin Lee),이상우(Sangwoo Lee),황상흠(Sangheum Hwang) 대한산업공학회 2021 대한산업공학회지 Vol.47 No.2

음식물 폐기물을 이용한 바이오 에너지 생산 및 오염물질 제거

이예진(Yejin Lee),오석영(Seok-Young Oh) 대한환경공학회 2022 대한환경공학회 학술발표논문집 Vol.2022 No.11

디자인의 감성만족도 평가를 위한 시선 엔트로피의 활용에 관한 기초연구

이예진(Yejin Lee),정광태(Kwang Tae Jung),이현철(Hyun Chul Lee) 대한인간공학회 2020 大韓人間工學會誌 Vol.39 No.5

Objective: The purpose of this study is to find out the possibility of using eye movement entropy for the emotional satisfaction evaluation of design. Background: Emotion is often considered important in product design. Emotion, however, is very comprehensive and difficult to express clearly, so there have been attempts to analyze it through eye tracking. Most researchers used basic eye tracking metrics such as eye fixation time, time to first fixation, the number of eye fixation, and the change of pupil size to evaluate emotion. Basic metrics are effective in analyzing the importance of each design element but difficulties arise when analyzing the overall aspects of the design. In order to assess user"s emotion about design, it is necessary to present eye movement as a single metric. Therefore, we suggest the possibility of using the eye movement entropy. Method: A literature study was conducted to determine how to obtain entropies from eye movement. In addition, an experiment was conducted to identify the relationship between emotional satisfaction and eye movement entropy. For the experiment, the front design images of three car models were used as experimental stimuli. Eight college students participated in the experiment and Tobii Glasses 2 was used to record eye movement while looking at car images. Car images were presented on the 65-inch TV screen. Subjects evaluated how much emotionally satisfied to the car design on a five-point scale at the end of each image presentation. Results: In the analysis of emotional satisfaction for car designs, it showed that a significant difference exist between car R and H. Therefore, eye movement entropies; Shannon entropy, Markov entropy, dwell time entropy, and heatmap entropy for R and H were calculated and analyzed. In the analysis of entropies for R and H, all entropies showed the average of the high entropy in the design model with highly emotional satisfaction. However, the means of Shannon, Morkov, dwell time entropy showed no significant difference between R and H, and heatmap entropy showed a significant difference. In the correlation analysis, there was no significant correlation between the emotional satisfaction and the Shannon, Markov and dwell time entropy, but there was a positive correlation (p=0.552) with the heatmap entropy. Conclusion: This study was carried out to know if the eye movement entropy can be used for the emotional satisfaction evaluation of design. The entropies derived from the gazeplot and heatmap of the eye movement showed a meaningful relationship with the emotional satisfaction, especially the heatmap entropy showed stronger correlation with the emotional satisfaction. Eye movement entropies were higher in the design with high emotional satisfaction, which means that the higher the emotion satisfaction level, the more the subject"s eye movement. From the results, it can be seen that eye movement entropy can be used as a meaningful physiological measure for evaluating the emotional satisfaction of a design, especially the heatmap entropy can be used as the most appropriate entropy measure. Application: The results of this study could be used as a guide to the use of eye tracking for the emotional satisfaction evaluation of design.