• Journal of the Korea Society of Computer and Information
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• v.14 no.12
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• pp.147-156
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• 2009

This paper proposes a SRTP key exchange scheme using split transfer of divided RSA public key in SIP-based VoIP environment without PKI. The existing schemes are hard to apply to real VoIP environment, because they require a PKI and certificates in the end devices. But in case of ZRTP. which is one of existing schemes, it's able to exchange SRTP Key securely without PKI, but it is inconvenient since it needs user's involvement. To solve these problems, the proposed scheme will split RSA public key and transmit them to SIP signaling secession and media secession respectively. It can defend effectively possible Man-in-The-Middle attacks, and it is also able to exchange the SRTP key without the user's involvement. Besides, it meets the requirements for security of SRTP key exchange. Therefore, it's easy to apply to real VoIP environment that is not available to construct PKL.

• The Journal of the Korea Contents Association
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• v.18 no.2
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• pp.405-418
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• 2018

This study identified several factors that may affect binge watching of drama series, which becomes more common, in the changing media environment and tested their influences empirically. For this objective, this research looked at how demographic variables, time availability, perceived effectiveness of interface, perceived content variability, neuroticism and motivations for drama binge watching affect binge watching of drama series. It also examined moderating effect of drama involvement. The findings showed that neuroticism, two motivations(playfulness/stress relief and program reputation motivation) have positive influences on binge watching of drama series. The moderating effect of drama involvement was also found. The meaning of results are also discussed.

• Journal of Microbiology and Biotechnology
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• v.23 no.12
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• pp.1683-1690
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• 2013

The cyclic AMP receptor protein (CRP) homolog, GlxR, controls the expression of several genes involved in the regulation of diverse physiological processes in Corynebacterium glutamicum. In silico analysis has revealed the presence of glxR binding sites upstream of genes ptsG, adhA, and ald, encoding glucose-specific phosphotransferase system protein, alcohol dehydrogenase (ADH), and acetaldehyde dehydrogenase (ALDH), respectively. However, the involvement of the GlxR-cAMP complex on the expression of these genes has been explored only in vitro. In this study, the expressions of ptsG, adhA, and ald were analyzed in detail using an adenylate cyclase gene (cyaB) deletion mutant and glxR deletion mutant. The specific activities of ADH and ALDH were increased in both the mutants in glucose and glucose plus ethanol media, in contrast to the wild type. In accordance, the promoter activities of adhA and ald were derepressed in the cyaB mutant, indicating that glxR acts as a repressor of adhA. Similarly, both the mutants exhibited derepression of ptsG regardless of the carbon source. These results confirm the involvement of GlxR on the expression of important carbon metabolic genes; adhA, ald, and ptsG.

• Journal of the Korean Society of Clothing and Textiles
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• v.29 no.8 s.145
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• pp.1049-1056
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• 2005

The purpose of the study was to investigate adolescents' attitudes toward clothing advertisements and, to examine how much the influence of clothing ads on their clothing purchase depends on their clothing involvements. This research was based on a survey method using questionnaires. The subjects for the research were 508 middle and high school students in the area of Daegu City and Gyungbuk Province. Such methods as factor analysis, correlations, ANOVA, T-test and Scheff's test were used to analyze the collected data. The results of this study can be summarized as follows: 1. Adolescents' clothing involvements showed three dimensions such as interest and symbolism, fashion and danger perception. 2. They showed three different attitudes toward clothing ads: positive, negative, and reliant. 3. The degree of the influence of clothing ads on adolescents' clothing purchase was great in the order of media ads, shop ads, discount ads and brand ads. 4. The more interested they were in clothing, the more likely they were to purchase their clothing on their will and the more positive and reliant on clothing ads they were, which they recognized as useful information.

• Journal of Distribution Science
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• v.22 no.2
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• pp.83-93
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• 2024

Purpose: Although many studies have addressed destination marketing concepts, the relationship between beach tourists' memorable tourism experience (MTE), revisit intention and electronic word of mouth (eWOM) remains unknown. To address this issue, the authors established a model to investigate the effects of MTE's dimensions on revisit intention and eWOM. Research design, data and methodology: Drawing on 581 questionnaires from domestic beach tourists in Vietnam, a quantitative study approach was administered to empirically analyze a partial least squares path model in PLS-SEM. Results: The findings revealed that four dimensions of MTE including hedonism, local culture, meaningfulness and involvement have positive influence on beach tourists' revisit intention. Besides, meaningfulness and knowledge directly affect eWOM. It is worth noting that beach tourists' revisit intention significantly and directly influence their eWOM. The findings also confirm the indirect effects of hedonism, local culture, meaningfulness and involvement on eWOM through the mediating role of revisit intention. Conclusions: This study will be important to determine beach tourists' behavior through each dimension of MTE. This study also emphasizes on the direct effect of beach tourists' revisit intention on eWOM, as well as confirms its mediating role in the relation between MTE and eWOM. The findings will assist policymakers and destination marketers with strategies and effective future actions.

• Korean Parent-Child Health Journal
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• v.13 no.1
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• pp.1-7
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• 2010

Purpose: The purpose of this study was to investigate the relationships among TV involvement, body image concern, restrained eating behavior and self-esteem of middle school students in one city. Methods: A cross-sectional survey design was used. A total of 229 boys and 267 girls enrolled in the middle schools completed self report questionnaire in June, 2009. The data was analyzed by using SPSS/WIN 17.0. Results: Of boys, 24.5% was over-weight/obese while 12.7% of girls was over-weight/obese. Compared to boys, girls involved more in TV (p<.001), and showed more body image concern, and restrained eating behavior (p<.001), but had lower self-esteem (p=.020). A significant positive correlation between TV involvement and body image concern was found in both boys and girls. However, only girls showed a negative association between TV involvement and self-esteem, and as well as between restrained eating behavior and self-esteem. As grouped by BMI, both boys and girls showed significantly different scores in restrained eating behavior (p<.001). Conclusion: These results suggest that the increased number of obese young adolescent need a weight management program including control for unhealthy eating behavior. The influence of mass-media on distorted body image for adolescents should be corrected. Also, an intervention for young obese girls to promote their self-esteem needs to be developed.

• The Journal of the Korea Contents Association
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• v.16 no.12
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• pp.707-723
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• 2016

The purpose of this study is to focus on the effects of different channel types of Word-of-Mouth on the product attitude. Additionally, the product involvement and gender are considered as moderating variables. The results of this study show that different word-of-mouth channel types have different effects on the product attitude, that is, off-line has more influence than on-line does. Also the product involvement moderates the relationship between the channel types of word-of-mouth and the product attitude, while the gender does not. The results imply that while building the word-of-mouth marketing strategy, companies should not only pay attention to the on-line media channel, but lay importance on the off-line communication channel.

• Journal of Information Technology Services
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• v.22 no.4
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• pp.141-157
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• 2023

The present work aimed to present the development of 'Funt', the augmented reality-based digital app as an educational tool for foreign language learning. Our work further evaluated the learning efficacy of the tool by the assessment of the three dependent measures including learning motivation, learning satisfaction, and learning involvement. With a learning app of 'Funt', students can use AR app to access recognition-based or location-based experiences such that any objects, artifacts, or media appear to be in the app. Students are then able to interact with the digital content by manipulating it to learn more about it. Students's engagement should also increase when they create their own experience in AR to demonstrate their understanding of a particular concept or words. Learning effects were evaluated on survey data collected from a hundred respondents aging six to nine years. One-group design for pre-test and post-test was utilized to examine the differences of learning efficacy by comparing the non-'Funt' group and the Funt group scores. A pairwise t-Test was performed for pairwise comparisons between two learning groups. The results indicate that the 'Funt' group scored significantly higher than the non-'Funt' group in the measures of learning motivation, learning satisfaction, and learning involvement. Overall, our results suggest that 'Funt' attracted the students' attention, provided them with a fun context to learn English vocabulary, and develop positive motivation and satisfaction towards vocabulary learning through AR technology.

• Korea Science and Art Forum
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• v.24
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• pp.399-409
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• 2016

This study's purpose is to research the correlation between property and the major festivals with media art of exemplary 3 cities among 8 Unesco Media Art Creative Cities. As a result, it is drawn a conclusion that the below strategies are necessary to achieve success for Unesco Media Art Creative City. First, from the Creative City's point of view, on the basis of the maximization of various merits such as history, natural surroundings, and human resources of the city, it is necessary to reconcile a vision of the city and an identity of Media Art Creative City, and to seek for continuous growth of the city by consistency and durability of control tower within the local government. Second, from the local festival's point of view, it is necessary to provide a differentiated service in the existing media art festivals, to attract the fusion of media art and festivals, and the diversification and the popularization of media art programs. And, it needs to lead to involvement of young people with the fusion of on-line and off-line festivals, the fusion of analogue and digital festivals. In the conclusion, for the successful constructing of Media Art Creative City, it is necessary to maximize the merits of the city's own, to enhance the image for Media Art Creative City with the correlation between the merits and media art, and to differentiate the city's own various festivals, ant the same time, to converge them with media art technology. With these strategies, the local festival can make a new leap for global festival when it constitutes a whole with Media Art Creative City.

• Journal of Korean Society of Forest Science
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• v.96 no.4
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• pp.377-386
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• 2007

This study testes an application possibility of the Elaboration Likelihood Model broadly used in communication science into forest science and examines the communication effects according to the media types. To examine the effectiveness of this model, the study sets involvement, the need for cognition, and the need for effect as motivation variable and prior knowledge as an ability variable. Most variables appear to be significant in the regression analysis and results of the study verify the possibility of the application of the Elaboration Likelihood Model in forest science. To measure the media effects, a simulation is also carried out using three media including television, newspaper, and the Internet. According to ANOVA analysis, television is more persuasive than newspaper, and there is no difference between television and the Internet in terms of persuasiveness. Regarding recall, television and the Internet are more effective than newspaper. Finally, the present study suggests effective and efficient forest communication policies based on the results.