• Journal of the Institute of Electronics Engineers of Korea CI
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• v.47 no.3
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• pp.51-58
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• 2010

Since Augmented Reality (AR) enables users to experience computer-generated content embedded in real environments, AR agents can be visualized among physical objects in the environments where the users exist, and directly interact with them in real-time. We model perceptual attention for autonomous agents in AR environments where virtual and physical objects coexist. Since such AR agents must adaptively perceive and attend to surrounded objects relevant to their goals, our model allows the agents to determine currently visible objects from the description of what virtual and physical objects are configured in the camera's viewing area. A degree of attention is assigned to each perceived object based on its relevance to achieve agents' goals. The agents can focus on a reduced set of perceived objects with respect to the estimated degree of attention. To demonstrate the effectiveness of our approach, we implemented an animated character that was overlaid over a miniature version of campus and that attended to buildings relevant to their goals. Experiments showed that our model could reduce the character's perceptual loads even when surroundings change.

• Korean Journal of Cognitive Science
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• v.14 no.3
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• pp.51-59
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• 2003

Various perceptual distortions in spatial vision occur during eye movements. Most of the studies on perceptual distortion have focused on the conjunctive eye movements. Recently, Li, Kham, Kim & Yoon (2002) reported that subjects experienced perceptual distortion of 3D slant of an object defined by the spatiotemproal pattern of occlusion. The present research examined whether the subjects experienced the same perceptual distortion in the target object whose luminance is different from that of background. It also examined the effect of the reference on the perceptual distortion of 3D slant of an object.

• Korean Journal of Cognitive Science
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• v.15 no.3
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• pp.15-24
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• 2004

The perceived position of a flashing target object is generally biased towards the direction of eye movement when there is no reference around the target. Current research examined the localization accuracy of a flashing target relative to a static reference. The perceived location of the target relative to the reference was distorted and the pattern of perceptual distortion systematically depended on the position of the reference relative to the target. This kind of result was consistently observed regardless of the distance between the reference and the target and direction of pursuit eye movement. We have discussed how these results could he explained by the theories previously suggested to explain the localization of objects.

• The Journal of Natural Sciences
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• v.10 no.1
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• pp.111-122
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• 1998

This study was performed to investigate the type perceived risk of clothing consumers and the types of information seeking, the relationship between perceived risk and information seeking, and the defferences according to the demographic variables. The surveyed data from 376 college students were analized using Person's correlation, factor analysis, t-test, and ANOVA. The risk perception of clothing consumers was classified into five types: economic and performance risk, loss of time risk, social risk, and loss of fashionability risk. The information seeking was classified into four types: advertisement, observation in shops, information in memory, and opinions of neighbors. The type of risk perception and the types of information seeking were correlated positively and were different according to expenditure on clothing.

• Journal of Dental Rehabilitation and Applied Science
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• v.30 no.4
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• pp.307-314
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• 2014

Although a laser has been introduced to implant dentistry for decades, its efficacy is still open debate. The aim of this literature review is to analyze and evaluate the efficacy of laser therapy for the treatment of dentinal hypersensitivity and periodontal conditions.

• Korean Journal of Cognitive Science
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• v.16 no.3
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• pp.175-188
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• 2005

Recently, Li, Brenner, Cornelissen and Kim (2002) reported that 2D shape perception during pursuit eye movement just reflected the retinal image, and this result implies that the visual system ignored the extra-retinal information. In reality, however, we usually do not experience the perceptual distottion of 2D shape during pursuit eye movement. One Possibility is that the visual system night exploit the fact that the relative location between objects on retinal image is constantly maintained even during pursuit eye movement. The present research examined this possibility. Interestingly, perceptual distortion of 2D shape was observed even in the presence of reference, however, the amount of distortion decreased compared to when the reference does not exist. The distance between the reference and the target affected the perceptual distortion. These results imply that reference information is used in 2D shape perception during pursuit eye movement but it cannot completely explain the stable and accurate representation of 2D shape perception during pursuit eye movement.

• Journal of the Korean Applied Science and Technology
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• v.35 no.1
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• pp.299-305
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• 2018

Perception refers to the process of acquiring all the information about the environment through various sensory organs such as the visual, auditory, tactile, and olfactory senses and integrating and interpreting the information transmitted to the brain. The ability to use these perceptions efficiently is called perceptual skill, and perceptual skill is an important factor for improving performance in the field of sports. As a result, many researchers have developed various perceptual training programs to maximize these perceptual skills while they have also progressed on attempting to verify their effects. The perceptual skill training introduced in this study is a training method that focuses on visual perception and is a training method that is applied in the United States and Europe. to improve sports performance. As a result of carrying out the perceptual skills training based on the kicker's important clue (the kicker's hip - the angle of the body and foot before kicking) to the goalkeeper in the situation of a soccer penalty kick improved the ability of predicting the direction of the ball while even in tennis, carrying out the perceptual skills training based on the server's important clue (position, ball, racket) improved the accuracy of the ability to predict in the direction of serve. Recently, there have been numerous research studies that were carried out on such perceptual skills training, but the number of studies conducted are insufficient, especially in Korea where research studies on perceptual training seem to be in a relatively neglected state. In addition, extensive studies need to be carried out to investigate whether the improvement of perceptual skills in the laboratory situation can be transitioned to an actual performance situation. Therefore, in order to elevate sports performance, researchers need to examine the perceptual training program's extent of necessity as well as the research direction regarding its effects.

• 건강소식
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• v.30 no.1 s.326
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• pp.12-13
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• 2006

노년기에 나타나는 신체적인 특징은 일반적인'노화 현상'이라고 볼 수 있다. 체력의 저하로 운동 기능이 둔화되고, 심폐 기능과 면역 능력이 저하되어 쉽게 병에 걸리고 주위 환경에 대한 적응력이 저하되는 현상이나타난다. 정신적인 노화도 나타나는데 일반적으로 감각, 지각, 지능 등과 같은 정신 및 신경기능의 저하와불안 또는 우울 등의 정서 및 성격의 변화를 나타내기도 한다.그러나 이러한 변화는 노화 과정에서 초래되는 것이기도 하지만 젊더라도 운동을 거의 하지 않는 사람들에게도 똑같이 일어나고 있다. 따라서 노화 현상이라기 보다는 근육의 불용성 위축으로 초래되는 것이기에 적절한 운동으로 예방 또한 가능하다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.6C
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• pp.770-776
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• 2004

The goal of perceptual audio coder is to reduce redundancy and irrelevancy of audio signal based on the concept of masking. Several studies on masking effect reveal that the masking threshold varies as a function of the noise-like or tone-like nature of audio signals. Therefore, tonality of audio signal influences significantly the quality and efficiency of perceptual audio coder In this paper, we propose a new effective algorithm for tonality measure using spectrum energy. Since the proposed algorithm consists of a few transcendental functions and simple operations, it has lower complexity than MPEG psychoacoustic model-II. The proposed algorithm was tested with some audio signals, and DSP implementation showed that the proposed algorithm could be implemented with 3 MIPS. These results illustrate the efficiency of proposed algorithm in both performance and complexity.

• The Journal of the Korea Contents Association
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• v.14 no.7
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• pp.137-150
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• 2014

This study has two major purposes. First, this research empirically tests whether there are the impacts of the third-person effects on individuals' perceptions of the girl groups' suggestive performance. The second purpose of this study is to examine the relationships between the perceptual biased toward the influences of the girl groups's suggestive performances and the supports for regulation. For this purpose, this paper investigated individuals' perception of different degrees to which the suggestive performance has influences on three dissimilar groups including 'the self', 'colleagues' and 'the others' and how they affect supports for regulation. An online survey was administrated on 305 people who have watched the girl groups' lasciviousness performance for data gathering. The collected data were analyzed with t-test, multiple and hierarchical regression. The results showed that there are significant differences in perceptions of the effect of suggestive performance on three groups including 'the self', 'colleagues' and 'the others'. The findings also revealed that the perception of the effects of lasciviousness performance on 'the others' is one of the strongest predictors for the supports for regulation. The implications of these results were also discussed.