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이재호(Lee Jaeho),신현수(Hyunsoo Shin),황현호(Hyunho Hwang),박상준(Sangjun Park),이성온(Lee Sungon) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2
기존의 정밀 스캔 시스템은 고정된 두 대의 카메라(혹은 1대의 프로젝터와 1대의 카메라)의 영역이 교차되는 영역에서만 깊이지도를 생성할 수 있다. 따라서 최종적으로 획득하는 깊이지도의 영역은 좁아지게 되는 문제가 존재한다. 이 문제를 해결하기 위해 본 논문에서는 정밀하면서도 넓은 영역의 깊이지도를 획득할 수 있는 스캔 시스템을 제안하였다. 스캔 영역에 대한 문제는 광원을 회전시킴으로서 해결하였으며, 이 과정에서 물체의 3차원 정보 획득을 위해서 카메라와 모터 회전축 사이의 기하하적 관계를 정밀히 파악해야하는 문제가 발생하였다. 카메라와 모터 회전축 사이의 위치 관계를 파악하기 위해 원뿔(cone) 모델을 만들었고 이에 기반한 새로운 캘리브레이션(Calibration) 방법을 제안하였다.
이근후(Lee Geunhu),조성택(Sungtaek Cho),류우석(Wooseok Ryu),신민준(Minjun Shin),김소연(Soyeon Kim),이성온(Lee Sungon) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.2
의료용 네비게이션에서 사용하는 스테레오 카메라는 각 카메라에서 얻은 영상정보를 바탕으로 로봇과 환자의 위치를 파악할 수 있다. 하지만 사람 또는 로봇의 움직임으로 인해 카메라가 가려지는 경우 목표를 끊김없이 추적할 수 없다. 본 논문에서는 이러한 문제를 해결하기 위해 3 대 이상의 적외선 카메라를 이용하여 넓은 각도에서 관측하여 카메라가 일부 가려지는 경우에도 나머지 카메라를 사용하여 끊김없이 목표의 위치와 자세를 파악할 수 있도록 하였다.
부모교육 교양수업 관련 유아 놀이성 분석:유아교사의 놀이신념과 민감성이 유아의 놀이성에 미치는 영향
이경진(Lee, Kyoungjn),황성온(Hwang, Sungon) 협성대학교 교양학연구소 2021 교양학연구 Vol.8 No.1
본 연구는 부모교육 교양수업에서 중요하게 다루는 유아의 놀이성을 분석한 것으로, 유아교사의 놀이신념과 민감성이 유아의 놀이성에 미치는 상대적 영향력을 알아보는데 그 목적이 있다. 이를 위하여 G도, I시에 소재한 유치원 및 어 어린이집 근무 중인 만 3∼5세 담임교사 80명을 대상으로 설문조사를 실시하였다. 수집된 자료는 SPSS 22.0 프로그램을 사용하여 통계처리 하였다. 측정도구의 신뢰도 검증을 위해서 Cronbach s α 계수를 산출하였다. 또한 Pearson의 상관분석과 다중회귀분석을 실시하였다. 자료분석 결과는 다음과 같다. 첫째, 유아교사의 놀이신념과 민감성은 모두 유아의 놀이성에 통계적으로 유의미한 정적 상관관계가 있는 것으로 나타났다. 둘째, 유아교사의 민감성을 제외한 유아교사의 놀이신념은 유아의 놀이성에 영향을 미치는 변수로 나타났다. 이러한 결과는 유아교사의 놀이신념이 유아의 놀이성을 예측하는 중요한 변인임을 시사한다. This study is intended to analyze the playfulness of children, which is important in parental education and liberal arts classes, and its purpose is to investigate the relative influence of play beliefs and sensitivity of early childhood teachers on playfulness of children. A survey was conducted on 80 teachers aged 3 to 5 who are working at kindergartens and language daycare centers located in G province and I city. The collected data were analyzed using the program SPSS 22.0. Cronbach s α coefficient was estimated for the reliability of the research instruments and pearson s correlation analysis was carried out to find out the correlation between research variables. Lastly, multiple regression analysis was also performed to determine the relative influence of the early childhood teachers play beliefs and sensitivity on children s playfulness. The results of this study can be summarized as follows. First, both the play beliefs and sensitivity of early childhood teachers were found to have a statistically significant positive correlation with the playfulness of children. Second, it was found that the early childhood teachers play beliefs excluding the teachers sensitivity influences the children s playfulness. These results suggest that the early childhood teachers play beliefs is an important predictor of the children s playfulness.
Advanced Motion Compensation Methods for Intravital Optical Microscopy
Vinegoni, Claudio,Sungon Lee,Feruglio, Paolo Fumene,Weissleder, Ralph IEEE 2014 IEEE journal of selected topics in quantum electro Vol.20 No.2
<P>Intravital microscopy has emerged in the recent decade as an indispensible imaging modality for the study of the microdynamics of biological processes in live animals. Technical advancements in imaging techniques and hardware components, combined with the development of novel targeted probes and new mice models, have enabled us to address long-standing questions in several biology areas such as oncology, cell biology, immunology, and neuroscience. As the instrument resolution has increased, physiological motion activities have become a major obstacle that prevents imaging live animals at resolutions analogue to the ones obtained in vitro. Motion compensation techniques aim at reducing this gap and can effectively increase the in vivo resolution. This paper provides a technical review of some of the latest developments in motion compensation methods, providing organ specific solutions.</P>
EMG-Based Continuous Control Scheme With Simple Classifier for Electric-Powered Wheelchair
Giho Jang,Junghoon Kim,Sungon Lee,Youngjin Choi IEEE 2016 IEEE transactions on industrial electronics Vol.63 No.6
<P>This paper presents an electromyographic (EMG)-based continuous control scheme including simple classifier for an electric-powered wheelchair, ultimately for quadriplegics. The proposed scheme utilizes three EMG signals as inputs for the muscle-computer interface. Since zygomaticus major muscles and transversus menti muscle of human face are able to move independently as well as to adjust contractile forces voluntarily, the surface EMG signals on these muscles are utilized for the electric-powered wheelchair control system. To extract the envelopes of the signal waveforms and to reflect the moving average activities, the root-mean-squares (RMS) operation and normalization are subsequently employed as initial signal processing. Then, an activation vector containing three normalized RMS signals is obtained in real time. The activation vector is applied to the simple classifier for finding out the motion command. Both desired linear acceleration and angular velocity are yielded from the linear combinations of the classification result and the magnitude of activation vector. Finally, desired wheel velocities of the wheelchair control system are obtained by using the integration and differential inverse kinematics. The effectiveness of the proposed control scheme is verified through several experiments such as avoiding obstacle cones and navigating long distance by the users.</P>
Ahn, Seeun,Park, Sungon,Park, Sangha,Choi, Hyomin,Jeon, Yein,Lee, Hyejoo The Korea Contents Association 2022 International Journal of Contents Vol.18 No.3
The purpose of this study was to investigate the satisfaction of personnel selection process according to type of personnel manager and to examine whether the relationship between the type of personnel manager and the satisfaction with the personnel selection process was moderated by the applicant's perception of procedural justice. This study was conducted using a between-group design with 208 students from a four-year university in Korea. One group watched a video in which a human personnel manager selected employees and the other group watched a video in which an AI personnel manager selected employees. Participants were randomly assigned to a condition, responded to a demographic questionnaire, and answered measures of procedural justice and satisfaction with personnel selection after watching the video. As a result, the selection process satisfaction was significantly higher when the human personnel manager conducted the selection process than when the AI personnel manager conducted such process. In addition, when procedural justice was perceived as low, there was a significant difference in satisfaction between human and AI groups. However, when procedural justice was perceived as high, there was no significant difference in satisfaction between the two groups. Based on study results, the significance and limitations of this study and suggestions for future studies are discussed.