• Phonetics and Speech Sciences
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• v.12 no.1
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• pp.11-17
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• 2020

Non-tonal language speakers may have difficulty learning second language lexical tones. In the present study, we explored this issue with Korean-speaking learners of Mandarin Chinese (i.e., non-tonal first language speakers) by examining their perception and production of Mandarin lexical tones. In the perception experiment, the Korean learners were asked to listen to the tone of each stimulus and assign it to one of four Mandarin lexical tones using the response keys; in the production experiment, the learners provided speech production data for the lexical tones and then their productions were identified by native listeners of Mandarin Chinese. Our results showed that the Korean learners of Mandarin Chinese had difficulty in perceptually distinguishing Tone 2 and Tone 3, with the most frequent production error being the mispronunciation of Tone 3 as Tone 2. We also investigated whether unfamiliar non-native phonemes (i.e., Chinese phonemes) that do not exist in the native language phonemic inventory (i.e., Korean) may hinder the processing of the non-native lexical tones. We found no evidence for such effects, neither for the perception nor for the production of the tones.

• Korean Journal of Cognitive Science
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• v.10 no.3
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• pp.17-28
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• 1999

Systematic distortions in perceived 3-D shape were obtained for elliptical and parabolic stereoscopic surfaces viewed at different distances under full and reduced cue conditions. In both conditions of Experiments 1 and 3, elliptical hemi-cylinders a appeared near veridical at the 45 cm viewing distances and flattened up to 74% of veridical at 135 cm. In Experiment 2, under full cue conditions, parabolic hemi-cylinders a appeared stretched to 118% of veridical at 45 cm, near veridical at 90 cm, and flattened to 85% of veridical at 135 cm. Under reduced cue conditions parabolas appeared flatter overall: veridical curvature was obtained at 45 cm viewing distance with flatness increasing to 68% of veridical at 135 cm. Results support a scaling explanation of perceived 3-D shape from disparity and rule out the alternative hypothesis that disparity curvature, an optical invariant, provides information for the direct perception of 3-D s shape.

• Proceedings of the Korea Society of Information Technology Applications Conference
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• 2004.06a
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• pp.71-71
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• 2004

• The Journal of the Korea Contents Association
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• v.16 no.11
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• pp.240-252
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• 2016

The purposes of this paper examines the extant to which congruence in leader and follower rating of LMX quality is related to organizational commitment, and perceptions of organizational politics(POPs). A conceptual model is introduced that identifies four combinations of leader and follower LMX ratings of Cogliser et al.(2009): balanced/low LMX(low leader and follower LMX), balanced/high LMX(high leader and follower LMX), follower overestimation(low leader LMX/high follower LMX), follower underestimation(high leader LMX/low follower LMX). The summary of results based on a sample of 236 matched pairs of leaders and followers in KOREA is as follows: First, balanced/high LMX and follower overestimation were associated with relatively high levels of affective organizational commitment, and perceptions of organizational politics. However, follower underestimation and balanced/low LMX was related to low levels of follower outcomes. In particular, follower underestimation and balanced/low LMX were significantly different from balanced/high LMX and follower overestimation. Second, perceptions of organizational politics was negatively related to affective organizational commitment in the four LMX relationship types. Especially, the negative relationship between POPs and organizational commitment was stronger for people who are low as compared with high in LMX quality. Theoretical and practical implications of our findings as well as directions for future research are provided.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.20 no.9
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• pp.1723-1729
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• 2016

Digital watermarking is tried to get an optimum tradeoffs between its performance characteristics, robustness, transparency and capacity. This paper is, therefore, suggesting a watermarking technique that builds multiple barcodes in various frequency bands to implement embedded watermarks that is imperceptible and robust against various attacks. Even though a watermark technique with duplicated barcode watermarks embedded in various frequency bands can satisfy robustness as there is high possibility that watermarks embedded in an image remains after various attacks, the duplicated barcode data can weaken imperceptibility. Thus, to satisfy the conflicting characteristic requirements of watermarks, robustness and imperceptibility, different barcode data is embedded in each frequency band. The test shows that ownership authentication with the technique suggested in this thesis does not require specialized hardware, and extracted watermarks can be easily identified through a mobile barcode scanner app, which allows low complexity, low cost and swift identification.

• Information Systems Review
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• v.24 no.2
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• pp.67-88
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• 2022

This study proposed a research model that can explain the usage intentions of users and non-users by considering the performance aspects of personal mobility and external environmental factors based on the SOR (Stimulus-Organism-Response) model, A survey was conducted targeting domestic users and non-users, and research models and hypotheses were verified through Partial Least Square (PLS) and Artificial Neural Network (ANN). As a result of the analysis, it was confirmed that the users' perceived satisfaction and perceived trust had a positive effect on their intention to use, and that perceived risk and environmental value had a significant relationship with perceived satisfaction and perceived trust. For non-users, it was found that there was a positive correlation between perceived satisfaction and intention to use, and it was verified that perceived risk and environmental value, like users, were significant antecedents of perceived satisfaction and perceived trust. Among the remaining variables, the perceived mobility of users and the perceived ease of use of non-users were respectively presented as important influencing factors on perceived satisfaction.

• The Journal of the Korea Contents Association
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• v.13 no.12
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• pp.402-411
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• 2013

Mobile contents market is growing with the rapid adoption of smart-phones. Online access via mobile compared to PC-based online access, has distinctive service delivery characteristics which are ubiquitous connectivity and contextual offer. In addition, this study includes characteristics which are relatively disadvantageous for mobile services compared to PC-based services. These are response time and supporting non-verbal informations. This study investigates the influence of service delivery characteristics to perceived interactivity and mobile service attitude. The results show that mobile services' ubiquitous connectivity and contextual offer showed a positive relationship with the perceived interactivity of the mobile service. And the response time also showed a positive relationship with the perceived interactivity, but non-verbal information didn't. When the trade-off is met between response time and nonverbal information, mobile service developer should choose response time since it has positive effect on perceived interactivity and attitude.

• Science of Emotion and Sensibility
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• v.21 no.2
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• pp.145-158
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• 2018

The purpose of this study was to investigate the visuo-spatial attention ability and the emotional perception ability of people across the normal range of the scores on the bipolar disorder scale. The Korean version of the Mood Disorder Questionnaire (K-MDQ) was used to measure the bipolar disorder tendency of normal people. A useful field of view (UFOV) task and an emotional perception task were used to measure visuo-spatial attention and emotional perception ability, respectively. The participants did not have any mental illness history or other medical problems. The participants were divided into three groups according to K-MDQ score (low, normal, and high), and their performances were compared. In the UFOV task, the high K-MDQ score group had lower level of performance than the other groups, suggesting that a high bipolar tendency is associated with reduction of visuo-spatial attention ability. In the emotional perception task, the group with the high K-MDQ score showed higher perception of negative emotion bias than the other groups, suggesting a high bipolar tendency to associate with reduction of emotional perception ability. These results suggest that visuo-spatial and emotional attention abilities are related with bipolar disorder tendency even in the normal population.

• Journal of Korean Home Economics Education Association
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• v.17 no.3 s.37
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• pp.1-15
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• 2005

The purpose of this study was to investigate adolescents' internet addiction tendencies according to their human resources which is composed of personal resources and interpersonal resources. The subjects of this study were 396 middle school students in Daegu. Analysis of data were done with the use of frequency. percentage, meat factor analysis, and MANOVA with the Scheffe test applied. The main results of this study were as follows : First, there were meaningful differences in adolescents' internet addiction tendencies according to their personal resources such as self-control ability, Problem-solving ability, and time management ability. Second, there were meaningful differences in adolescents' internet addiction tendencies according to their interpersonal resources such as parents-support, peer-support, and teacher-support.

• The Journal of the Korea Contents Association
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• v.19 no.4
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• pp.303-314
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• 2019

The purpose of this research is to analyze the actual behavior of foreign students health behavior and toothbrush behavior, analyze the relationship with health beliefs, and prepare basic materials for maintaining and promoting foreign students health. Analyzed with the SPSS WIN 12.0 program and gained meaningful results(p<.05). The gross average of health beliefs was 3.71.Perceived sensitivity mean was 2.99, perceived seriousness mean was 3.47 and perceived profitability mean was the highest at 4.35.In the case of Health beliefs according to health behavior and oral health behavior, perceived sensitivity and health beliefs was high in non-drinking. Perceived profitability and health beliefs was high in non-smoking. Health beliefs, perceived importance and profitability were high at the replacement time of brushing where the crust was sensitive in the range of brushing. In the brushing range, perceived sensitivity was high. In the brushing exchange cycle, health beliefs, perceived seriousness and perceived profitability were high. As a result of regression analysis, non-smoking(p=.009), brushing exchange time was 1-3 months (p=.000), health belief was high. A comprehensive systematic education of appropriate health and brushing behavior will be carried out for international student health promotion.