• Proceedings of the KOSOMBE Conference
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• v.1995 no.11
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• pp.273-277
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• 1995

많은 생리적 지능 연구자들은 생체신호 또는 생리적 측정치들을 지능의 새로운 측정치로서 제안하고 있는데, 이들의 기본 가정은 현재의 지능검사는 교육, 가정의 양육태도, 부모의 사회경제적 지위와 같은 문화적 요인에 의해 크게 좌우되므로 지능의 편파적인 측정치가 될 수밖에 없고, 이러만 요인에 가장 적게 영향받는 생리적 측정치만이 순수한 지능 즉정치가 될 수 있다는 것이다. 따라서, 본 연구는 이러한 생리적 신호들 중 EOG(electro-oculograph)를 이용하여 안구의 움직임을 기록함으로서 피검자의 문제해결을 위한 집중력과 이해력 등을 알아보고자 하였다. 또한, 피검자의 정보처리과정을 알아보기 위해 반응시간(RT, reaction time)을 측정하였다. 17명의 건강한 남녀 학생들이 실험에 참여하였으며, 첫단계로 Raven's Advanced Matrices 검사와 IQ 검사를 실시하고, 검사 결과에 근거하여 각각을 세 그룹으로 나누었다. 두번째 단계로는 슬라이드로 제작된 도형유추과제를 푸는 동안 EOG와 RT를 측정하였다. IQ 검사 점수, RT, 그리고 EOG로부터 추출된 변수들 간의 상관관계를 구하기 위해 GLM(general linear model) 및 Duncan's multiple range test를 위한 통계분석을 수행하였다. 분석결과를 통하여 도형유추과제의 난이도가 높을수록 EOG변수들에 의한 지능점수의 분류능력이 높음을 알 수 있었으며, Raven그룹보다는 IQ그룹에 대한 분류가 더욱 잘 이루어졌음을 발견하였다. 그리고, RT는 Raven그룹과 IQ그룹 모두에서 높은 변별력을 나타내고 있음을 확인하였다.

• The Journal of the Korea Contents Association
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• v.18 no.1
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• pp.1-9
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• 2018

A keyboard system for hands-free virtual reality head mounted display using electrooculogram (EOG) signal which occurs during the eye-blinking is proposed. This system consists of display device, gyroscope sensor, gravity sensor and electro-encephalogram (EEG) sensor, and it is implemented with Unity3D engine for system control and graphic processing. If the input language of proposed keyboard system is Korean, i.e. Hangul, the Chonjiin keyboard method is utilized; but for the English spelling, numbers or special characters, $3{\times}4$ keyboard method is used in order to solve the spatial problem. By the implemented method, it can be verified that the user can handle the keyboard input of virtual reality head mounted display with only neck movement and EOG, instead of using hands.

• Proceedings of the Korean Society for Emotion and Sensibility Conference
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• 2011.05a
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• pp.37-38
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• 2011

• Journal of Biomedical Engineering Research
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• v.13 no.1
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• pp.65-68
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• 1992

In the present study, an attempt is presented to define the power spectrum of the saccades recorded in man by using bitemporal EOG. In this study, it was found that the estimated bandwidth of the spectrum of the saccades decreases for increasing saccade amplitude. This study could show a reference value about the minimum bandwidth needed to correctly measure even small saccades by bitemporal EOG. It also showed that EOG method is not appropriate to measure microsaccade.

• 제어로봇시스템학회:학술대회논문집
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• 2001.10a
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• pp.46.3-46
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• 2001

The overall aim of this research is to develop a computer communication interface based on brain-wave bio potentials for physically disabled people. The work focuses on using EOG and EMG signals to input characters one by one using cursor movements on a GUI screen. The Cyberlink TM system is used to acquire brain waves in real time with electrodes. EMG and EOG signals are used to direct a cursor in order to select, or to click on a character on the screen. We present a novel method for automatic EOG pattern detection by using wavelet transforms with a neuro-fuzzy approach ...

• Journal of Korea Multimedia Society
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• v.7 no.12
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• pp.1650-1656
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• 2004

In this paper, a multi-adaptive filter is proposed for removing EOG and the 60 Hz power supply noise from EEG measured in the frontal lobe and the feedback output control method is implemented for biofeedback. The multi-adaptive filter has been implemented on the TMS320C6711 DSP system and the feedback output control algorithm has been realized by calculating the ratio of alpha wave on the TMS320C31 DSP system with real time performance. Through the experiment using the implemented multi-adaptive filter and feedback output controller, we demonstrate that the proposed adaptive filter effectively removes EOG and the 60 Hz power supply noise from the measured EEG in the frontal lobe and the feedback algorithm controls the level of stimulation by the ratio of the alpha wave.

• Proceedings of the KIEE Conference
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• 2006.07d
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• pp.1821-1823
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• 2006

This paper presents a development of interface device for electro-oculogram(EOG) signal and it's application to the wireless mouse of wearable PC. The interface device is composed of five bio-electrodes for detecting oculomotor motion, several band-pass filters, instrumentation amplifier and a microprocessor. we have first analyzed impedance characteristics between skin and a bio-electrode. since the impedance highly depends on human face, it's magnitude differs from person. this interface device was applied to develop a wireless mouse for wearable PC, as a Bio Machine Interface(BMI). Where in the prompt on PC monitor is controlled by only EOG signals. this system was implemented in a Head Mount Display(HMD) unit. experimental results show the accuracy of above 90%.

• Proceedings of the IEEK Conference
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• 2000.06e
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• pp.218-221
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• 2000

The electronystagmography(ENG) means to measure and record CRP(Corneal-Retinal Potential) whenever the eyeball is moved by using a skin electrode stuck to the hi-temporal and the difference of CRP. Both the horizontal and vertical movement are known according to the position of the stuck skin electrode. In this paper, the variable time-constances to record the eyeball signal of the conventional EOG(Electro-Oculograph) Amplifier is chosen. The shorter the time-constance is, the worse the distortion of a signal is. But the unbalanced impedance of the electrode stuck on the hi-temporal is reduced. Also, the longer the time-constance is, the less the distortion of it signal is. But it is sensitive to the change of base line according to the unbalanced impedance. In order to solve these problems, an DC-Amplifier, the distortion of the eyeball signal is globally used. By solving unbalanced impedance problem of EOG amplifier, the distortion ratio of EOG amplifier is improved.

• Journal of the Korea Society of Computer and Information
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• v.13 no.5
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• pp.187-193
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• 2008

Interface technologies for a user to control home automation system in wearable computing environment has been studied recently. This paper proposes a new interface method for a disabled person to control home automation system in wearable computing environment by using EOG sensing circuit and marker recognition. In the proposed interface method, the operations of a home network device are represented with human readable markers and displayed around the device. A user wearing a HMD, a video camera, and a computer selects the desired operation by seeing the markers and selecting one of them with eye movement from the HMD display The requested operation is executed by sending the control command for the selected marker to the home network control device. By using the EOG sensing circuit and the marker recognition system a user having problem with moving hands and fit can manipulate a home automation system with only eye movement.

• Journal of Korean Neurosurgical Society
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• v.64 no.2
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• pp.282-288
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• 2021

Objective : Electrooculography (EOG) records eyeball movements as changes in the potential difference between the negatively charged retina and the positively charged cornea. We aimed to investigate whether reliable EOG waveforms can be evoked by electrical stimulation of the oculomotor and abducens nerves during skull base surgery. Methods : We retrospectively reviewed the records of 18 patients who had undergone a skull base tumor surgery using EOG (11 craniotomies and seven endonasal endoscopic surgeries). Stimulation was performed at 5 Hz with a stimulus duration of 200 μs and an intensity of 0.1-5 mA using a concentric bipolar probe. Recording electrodes were placed on the upper (active) and lower (reference) eyelids, and on the outer corners of both eyes; the active electrode was placed on the contralateral side. Results : Reproducibly triggered EOG waveforms were observed in all cases. Electrical stimulation of cranial nerves (CNs) III and VI elicited positive waveforms and negative waveforms, respectively, in the horizontal recording. The median latencies were 3.1 and 0.5 ms for craniotomies and endonasal endoscopic surgeries, respectively (p=0.007). Additionally, the median amplitudes were 33.7 and 46.4 μV for craniotomies and endonasal endoscopic surgeries, respectively (p=0.40). Conclusion : This study showed reliably triggered EOG waveforms with stimulation of CNs III and VI during skull base surgery. The latency was different according to the point of stimulation and thus predictable. As EOG is noninvasive and relatively easy to perform, it can be used to identify the ocular motor nerves during surgeries as an alternative of electromyography.