• 대한인간공학회지
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• 제31권6호
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• pp.785-791
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• 2012

Objective: The aim of this study was to investigate the correlation between 3D visual fatigue and physiological measures by canonical correlation analysis enabling to categorical correlation. Background: Few studies have been conducted to investigate the physiological mechanism underlying the visual fatigue caused by processing 3D information which may make the cognitive mechanism overloaded. However, even the previous studies lack validation in terms of the correlation between physiological variables and the visual fatigue. Method: 9 Female and 6 male subjects with a mean age of $22.53{\pm}2.55$ voluntarily participated in this experiment. All participants were asked to report how they felt about their health sate at after viewing 3D. In addition, Low & Hybrid measurement test(Event Related Potential, Steady-state Visual Evoked Potential) and for evaluating cognitive fatigue before and after viewing 3D were performed. The physiological signal were measured with subjective fatigue evaluation before and after in watching the 3D content. For this study suggesting categorical correlation, all measures were categorized into three sets such as included Visual Fatigue set(response time, subjective evaluation), Autonomic Nervous System set(PPG frequency, PPG amplitude, HF/LF ratio), Central Nervous System set(ERP amplitude P4, O1, O2, ERP latency P4, O1, O2, SSVEP S/N ratio P4, O1, O2). Then the correlation of three variables sets, canonical correlation analysis was conducted. Results: The results showed a significant correlation between visual fatigue and physiological measures. However, different variables of visual fatigue were highly correlated to respective HF/LF ratio and to ERP latency(O2). Conclusion: Response time was highly correlated to ERP latency(O2) while the subjective evaluation was to HF/LF ratio. Application: This study may provide the most significant variables for the quantitative evaluation of visual fatigue using HF/LF ratio and ERP latency based human performance and subjective fatigue.

• 한국콘텐츠학회:학술대회논문집
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• 한국콘텐츠학회 2003년도 춘계종합학술대회논문집
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• pp.351-355
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• 2003

포유류 동물의 시각피질 세포에 나타나는 특징은 크게 단순특징을 추출하는 simple cell과 복잡한 특징에 반응하는 complex cell로 구분된다. 이 연구에서는 입력영상에 독립성분분석을 적응하여 complex cell에 대응하는 복잡한 특징을 추출하였다. 이 결과는 시각피질 세포의 정보처리에 대한 방식을 이해하는 데 기여할 것이다.

• 복식문화연구
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• 제19권6호
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• pp.1247-1258
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• 2011

This study aimed to clarify the relationships among the characteristics of consumers and their influence on fashion leadership. Two kinds of variables were investigated in this study: centrality of visual product aesthetics and consumer innovativeness as personal characteristics, and role-relaxed consumption and consumer susceptibility to interpersonal influence as interpersonal characteristics. Data were gathered by surveying university students in the Seoul metropolitan area, using convenience sampling, and 322 questionnaires were used in the statistical analysis. In analyzing data, correlation analysis, factor analysis, and regression analysis were conducted. Factor analysis on the centrality of visual product aesthetics revealed three sub-factors: value, acumen, and response intensity. Meanwhile, factor analysis for consumer susceptibility to interpersonal influence revealed two sub-factors: informative and normative conformities. However, consumer innovativeness, role-relaxed consumption, and fashion leadership revealed only one factor. Regression analysis showed that visual product aesthetics, especially acumen and response intensity, were the most influential factors; furthermore, consumer innovativeness and normative conformity had positive influence on fashion leadership. However, role-relaxed consumption had negative influence on fashion leadership.

• 말소리와 음성과학
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• 제4권3호
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• pp.25-30
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• 2012

This study investigated whether native Korean listeners could use visual cues for the identification of the English consonants /b/ and /v/. Both auditory and audiovisual tokens of word minimal pairs in which the target phonemes were located in word-initial or word-medial position were used. Participants were instructed to decide which consonant they heard in $2{\times}2$ conditions: cue (audio-only, audiovisual) and location (word-initial, word-medial). Mean identification scores were significantly higher for audiovisual than audio-only condition and for word-initial than word-medial condition. Also, according to signal detection theory, sensitivity, d', and response bias, c were calculated based on both hit rates and false alarm rates. The measures showed that the higher identification rate in the audiovisual condition was related with an increase in sensitivity. There were no significant differences in response bias measures across conditions. This result suggests that native Korean speakers can use visual cues while identifying confusing non-native phonemic contrasts. Visual cues can enhance non-native speech perception.

• 융합신호처리학회논문지
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• 제11권2호
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• pp.132-136
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• 2010

본 연구에서는 시청각 자극의 공간적 차이가 지각 공간에 있어서 사물과 영상의 배치에 주는 영향을 조사하기 위해 심리적 실험을 하였다. 실험에서는 시각자극과 청각자극을 동시에 제시하고 두 개의 자극이 공간적으로 어느 정도 차이를 느끼는가를 판단하였다. 시각자극은 정면에 있는 스피커를 중심으로 $-70^{\circ}$, $-40^{\circ}$, $-20^{\circ}$, $0^{\circ}$, $20^{\circ}$, $40^{\circ}$, $70^{\circ}$의 7방향, 청각자극은 시각자극을 중심으로 하여 $-20^{\circ}{\sim}20^{\circ}$까지 $5^{\circ}$ 간격으로 9방향을 제시하였다. 실험 참가자는 시각자극과 청각자극이 어느 정도 차이가 있다라고 느낀 것을 1에서 5까지 5단계 평가 척도를 이용하여 회답하였다. 그 결과 시각자극의 제시 각도가 $0^{\circ}$의 경우는 청각자극의 제시 각도가 시각자극의 제시 각도에서 멀어짐에 따라 점차적으로 크게 나타났으며 제시 각도를 중심으로 좌우 대칭으로 나타났다. 정면에서 우측에 시각자극이 제시된 경우는 청각자극의 제시 각도가 시각자극의 제시 각도에서 멀어짐에 따라 평가치가 크게 되었다. 이것은 시각자극의 제시 각도가 $0^{\circ}$의 경우와 같은 경향을 나타내었다. 반대로 좌측에 시각자극이 제시된 경우는 평가치가 작게 나타났다. 이것은 제시 각도가 멀어짐에도 불구하고 같은 방향에서 제시되고 있다는 것을 알 수 있으며 거리를 짧게 인식하는 경향이 나타났다.

• 한국콘텐츠학회논문지
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• 제3권2호
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• pp.19-23
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• 2003

포유류 동물의 시각피질 세포에 나타나는 특징은 크게 단순특징을 추출하는 simple cell과 복잡한 특징에 반응하는 complex cell로 구분된다. 특히, 하위 계층의 세포들은 단순특징을 추출하며, 상위 계층으로 갈수록 복합특징을 추출하는 세포들이 존재한다. 이 연구에서는 입력영상에 독립성분분석을 적용하여 complex cell에 대응하는 복잡한한 특징을 추출하였다. 이 결과는 시각피질 세포의 정보처리에 대한 방식에 대한 이해를 기반으로 시각정보처리 알고리즘을 개발하는 데 기여할 것이다.

• Fisheries and Aquatic Sciences
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• 제26권8호
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• pp.514-523
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• 2023

The visible threshold of Oreochromis niloticus responded to high light intensity under short wavelengths, whereas the response to low light intensity under long wavelengths was low, with a minimum visual threshold of 574 nm of LED lights. Movement distance of O. niloticus was dropped at 31℃ and increased abnormally at 37℃ under natural light. Comparing movement distance under red (622 nm) and green (518 nm) lights of LED, movement distance and swimming speed under red and green lights were higher than under natural light. However, the movement distance decreased rapidly at 31℃ under red light and lowest at 33℃ under green light. After that, there was a tendency to adapt to high water temperatures gradually. Consequently, red and green lights may be recommended for O. niloticus's aquaculture because the red and green lights have a positive effect on growth performance, survival rate, and metabolism, as shown in previous studies. It is necessary to control the water temperature below 32℃ because abnormal behavior above 32℃ revealed under red and green LED lights and natural light.

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2011년도 추계학술대회
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• pp.3-4
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• 2011

• 한국감성과학회:학술대회논문집
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• 한국감성과학회 2000년도 추계학술대회 논문집
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• pp.73-80
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• 2000

The paper is addressed to the topic of physiological response-specificity in disgust induced by visual stimulation. The purpose of this study was to evaluate reproducibility of physiological reactivity pattern during disgust elicited by the International Affective Pictures System (IAPS) in 2 experiments. Twenty-nine subjects participated in the first experiment with 3 visual stimulation sessions with disgust-eliciting slides (3 slides in each 1 min long session). In the second experiment disgust-eliciting slides from the IAPS were presented to 42 subjects in 2 sessions (one slide for 1 min). Spectral power of frontal EEG, skin conductance (SCL, SCR and NS.SCR), heart rate(HR), heart period variability(HPV) and respiration rate were recorded. Visual stimulation evoked 1:.n deceleration, higher power of high frequency component of HPV, increased SCL and NS.SCR frequency, frontal slow alpha blocking and moderate increase in fast beta power in most of the sessions in both experiments. However in the second experiment the EEG pattern associated with disgust showed inconsistent shifts in fast alpha and slow beta bands, but was marked by higher power of theta activity. Our data in both experiments emphasizes presence of disgust-specific profiles of autonomic and at the less extent EEG responses in visual stimulation context. Discussed are potential behavioral mechanisms leading to observed physiological manifestations in disgust elicited by visual stimulation. The results support the consideration that disgust is an withdrawal type negative valence emotion associated with relatively low autonomic arousal (low HR, low amplitude SCRs with relatively high NS.SCR frequency) and moderate EEG activation signs. Obtained data showed more consistent reproducibility of disgust-specific autonomic rather than EEG response patterns during visual stimulation design.

• 한국소음진동공학회:학술대회논문집
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• 한국소음진동공학회 2004년도 춘계학술대회논문집
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• pp.1018-1021
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• 2004

This study is an experimental study to introduce the soundscape design for urban parks. subjective response to soundscape for 4 urban park are carried out using 7 scale S.D. method which are included 25 adjective pairs. In order to recognized the effect environmental sound(bird singing, sweet environmental music, nature sound) for enriching the present sondscape, this study analyse the subject response for soundscape after and before using the environmental sound. The degree of satisfaction for visual atmosphere is higher than for auditory atmosphere of parks, this means that visual clues are much more effective to the environment condition than auditory clues. The effect of using the environmental sound is positive and effective to enrich the soundscape. On providing environmental sounds, it is necessary to consider the charcteristics of urban parks.