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POMY: 햅틱 피드백을 적용한 몰입형 영어 학습 시스템
이재봉(Jaebong Lee),이규송(Kyusong Lee),Hoang Minh Phuong,이호진(Hojin Lee),이근배(Gary Geunbae Lee),최승문(Seungmoon Choi) 제어로봇시스템학회 2014 제어·로봇·시스템학회 논문지 Vol.20 No.8
In this paper, we propose a novel CALL (Computer-Assisted Language Learning) system, which is called POMY (POSTECH Immersive English Study). In our system, students can study English while talking to characters in a computer-generated virtual environment. POMY also supports haptic feedback, so students can study English in a more interesting manner. Haptic feedback is provided by two platforms, a haptic chair and a force-feedback device. The haptic chair, which is equipped with an array of vibrotactile actuators, delivers directional information to the student. The force-feedback device enables the student to feel the physical properties of an object. These haptic systems help the student better understand English conversations and focus on studying. We conducted a user experiment and its results showed that our haptic-enabled English study contributes to better learning of English.
Lee, Hyoin,Jung, Seungmoon,Lee, Peter,Jeong, Yong Academic Press 2017 Experimental neurology Vol.296 No.-
<P>The latent period, a seizure-free phase, is the duration between brain injury and the onset of spontaneous recurrent seizures (SRSs) during epileptogenesis. The latent period is thought to involve several progressive pathophysiological events that lead to the evolution of the chronic epilepsy phase. Hence, it is vital to investigate the changes in the latent period during epileptogenesis in order to better understand temporal lobe epilepsy (TLE), and to achieve early diagnosis and appropriate management of the condition. Accordingly, recent studies with patients with TLE using resting-state functional magnetic resonance imaging (rs-fMRI) have reported that alterations of resting -state functional connectivity (rsFC) during the chronic period are associated with some clinical manifestations, including learning and memory impairments, emotional instability, and social behavior deficits, in addition to repetitive seizure episodes. In contrast, the changes in the intrinsic rsFC during epileptogenesis, particularly during the latent period, remain unclear. In this study, we investigated the alterations in intrinsic rsFC during the latent and chronic periods in a pilocarpine-induced TLE mouse model using intrinsic optical signal imaging (IOSI). This technique can monitor the changes in the local hemoglobin concentration according to neuronal activity and can help investigate large-scale brain intrinsic networks. After seeding on the anatomical regions of interest (ROIs) and calculating the correlation coefficients between each ROI, we established and compared functional correlation matrices and functional connectivity maps during the latent and chronic periods of epilepsy. We found a decrease in the interhemispheric rsFC at the frontal and temporal regions during both the latent and chronic periods. Furthermore, a significant decrease in the interhemispheric rsFC was observed in the somatosensory area during the chronic period. Changes in network configurations during epileptogenesis were examined by graph theoretical network analysis. Interestingly, increase in the power of low frequency oscillations was observed during the latent period. These results suggest that, even if there are no apparent ictal seizure events during the latent period, there are ongoing changes in the rsFC in the epileptic brain. Furthermore, these results suggest that the pathophysiology of epilepsy may be related to widespread altered intrinsic functional connectivity. These findings can help enhance our understanding of epileptogenesis, and accordingly, changes in intrinsic functional connectivity can serve as an early diagnosis. (C) 2017 Elsevier Inc. All rights reserved.</P>
Haptic Assistance for Memorization of 2-D Selection Sequences
Hojin Lee,Gabjong Han,In Lee,Sunghoon Yim,Kyungpyo Hong,Hyeseon Lee,Seungmoon Choi IEEE 2013 IEEE transactions on human-machine systems Vol.43 No.6
<P>This paper investigates the effect of haptic feedback on the learning of a 2-D sequential selection task, used as an abstraction of complex industrial manual assembly tasks. This mnemonic-motor task requires memorization of the selection order of points scattered on a 2-D plane and reproduction of this order using entire arm movements. Four information presentation methods, visual information only, visual information + enactment, visual information + haptic guidance, and visual information + haptic disturbance, are considered. The latter three methods provide different levels of haptic kinesthetic feedback to the trainee. We carried out a user study to assess the quantitative performance differences of the four training methods using a custom-built visuo-haptic training system. Experimental results showed the relative advantages and disadvantages of each information presentation method for both short-term and long-term memorization. In particular, training with only visual information was the best option for short-term memory, while training also with haptic disturbance was the most effective for long-term memory. Our findings have implications to designing a training method that is suitable for given training requirements.</P>
Social deficits in the AY-9944 mouse model of atypical absence epilepsy
Jung, Seungmoon,Seo, Jin Soo,Kim, Byung Sun,Lee, Doheon,Jung, Keun-Hwa,Chu, Kon,Lee, Sang Kun,Jeon, Daejong Elsevier 2013 Behavioural brain research Vol.236 No.-
<P><B>Abstract</B></P> <P>Atypical absence epilepsy (AAE) showing slow spike-and-wave discharges (SWD) is characterized by severely abnormal cognition and neurodevelopmental or neurological outcomes in humans. However, despite the severe behavioral outcomes in AAE, the relationship between AAE and social-behavioral dysfunctions has not defined well, either experimentally or in patients with AAE. Experimentally, AAE can be produced by administering AY-9944 (AY), a cholesterol biosynthesis inhibitor. In this study, we characterized social behavior in the AY mouse model of AAE. AAE in the mouse was induced by repeated postnatal administration of AY every 6 days from postnatal day (P) 2 to P20. AY-treated mice exhibited spontaneous, recurrent, and synchronous SWD (4–5Hz) in electroencephalographic recordings. AY-treated mice performed tasks involving sociability/social novelty preference, social interaction with a juvenile conspecific, observational fear, and resident–intruder aggression. They showed behavioral dysfunction in social interactions with a juvenile conspecific and sociability/social novelty preference tasks. They also exhibited reduced social fear learning in observational fear conditioning. Interestingly, they showed increased levels of offensive behaviors in a resident–intruder task. However, AY-treated mice displayed normal levels of anxiety in light/dark transition and the elevated plus maze tasks, and showed slightly increased locomotor activity in an open-field task. These results demonstrate social dysfunction in the AY-induced AAE model. Our study of social behavior can also provide valuable information about Lennox–Gastaut syndrome, in which AAE is a component. Thus, our findings may help to understand behavioral pathogenesis or characteristics of patients with AAE.</P> <P><B>Highlights</B></P> <P>▸ Psychiatric comorbidities are a major concern in atypical absence epilepsy (AAE). ▸ Administration of AY-9944 can produce a mouse model of AAE. ▸ AY-treated mice show spontaneous and recurrent spike-and-wave discharge (4–5Hz). ▸ Severe social deficits, but normal anxiety, were found in the AY model of AAE.</P>
이선영(Lee Sunyoung),이은경(Lee Eunkyeong),연승문(Yeon Seungmoon),김지영(Kim Jiyoung) 충북대학교 생활과학연구소 2013 생활과학연구논총 Vol.17 No.2
The ideology and philosophy of ancestors were inherent in our traditional architecture. The purpose of this study is to review the beauty of traditional culture and to express it in the new and modern way through the development of fashion design applying Korean palace roof. After literature review and field survey of taking pictures and observation on palace roof, design planning was decided. The Paljak roof is the source of design, its both ends descend vertically and spread again in all directions in splendid and dignified. Four works were made with motives using characteristics and forms of roof. Work 1 was inspired by roof tiles form and applied to jacket peplum. Work 2 was inspired by rafters under the roof and applied to outer and the form of eaves was applied to one-piece dress. Work 3 was inspired by overall silhouette of Paljak roof and expressed as pointed shoulder line of jacket. Work 4 was expressed with structural and repeated shape using the form of eaves bottom of roof. The traditional motives and Korean beauty can be expressed with modern sense through this study. To show the excellence and values of Korean culture, the design planning using traditional culture should be carried out steadily.
이영규(Younggyu Lee),김진수(Jinsoo Kim),박채용(Chaeyong Park),최승문(Seungmoon Choi),이은일(Eunil Lee),안현주(Hyeonju Ahn),공병석(Byungseok Kong) 한국HCI학회 2021 한국HCI학회 학술대회 Vol.2021 No.1
본 연구는 차량 내 터치스크린에 구현된 가상 버튼을 조작할 때, 사용자에 제공되는 버튼의 느낌에 대해 청각 및 촉각의 멀티센서리 피드백의 영향을 알아보았다. 차량 내 콕핏의 터치스크린을 모사한 모듈을 구성하고, 진동 및 소리 효과를 이용한 멀티센서리 피드백을 제공하는 다양한 종류의 가상 버튼을 구현하였다. 가상버튼에 대한 사용자의 주관적인 평가를 위해, 실제 운전자들을 대상으로 버튼의 선호도, 사실감, 중량감 및 고급감을 평가하는 사용자 실험을 진행하였다. 실험 결과, 가상 버튼을 조작함에 있어 청각 및 촉각 효과가 모두 큰 영향을 줌을 알게 되었다. 본 연구의 결과를 통해 차량 내 가상 버튼을 디자인할 때 멀티센서리 효과를 복합적으로 고려해야 하는 필요성에 대해서 제시한다.