• Journal of Convergence for Information Technology
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• v.10 no.8
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• pp.15-22
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• 2020

The 4th industrial revolution and the rapid change in the data environment revealed technical limitations in the existing relational database(RDB). As a new analysis method for unstructured data in all fields such as IDC/finance/insurance, interest in graph database(GDB) technology is increasing. The graph database is an efficient technique for expressing interlocked data and analyzing associations in a wide range of networks. This study extended the existing RDB to the GDB model and applied machine learning algorithms (pattern recognition, clustering, path distance, core extraction) to detect new abnormal signs. As a result of the performance analysis, it was confirmed that the performance of abnormal behavior(about 180 times or more) was greatly improved, and that it was possible to extract an abnormal symptom pattern after 5 steps that could not be analyzed by RDB.

• Journal of Convergence for Information Technology
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• v.11 no.4
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• pp.230-241
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• 2021

This study has attempted to provide an important understanding about the information asymmetry in markets through empirical analysis on how the disclosure of low quality can increase demand even in the short run. More specifically, this study has extended the previous findings from the related literature by considering the effect of information search cost and providing empirical evidences about the effect of voluntary disclosure of low quality, using an experimental method with purchase scenarios. The results from our analysis show that reduced perceived risk have an important effect on sharing negative information, while the effect of information search cost is minimal. We also explain the circumstances whereby the information disclosure of a seller with low-quality product can enhance not only the seller's profitability but also customers' welfare by increasing the market demand and the demand for the seller claiming high quality.

• Journal of Convergence for Information Technology
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• v.8 no.5
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• pp.243-249
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• 2018

This study is to verify the accommodation attitudes and intention of use of the end-users to use the drone distribution delivery service that is to be introduced in Korea. For a research purpose, the research model and hypothesis in this study have been set based on by using the SPSS 22.0. Upon these, the extended technology acceptance model has been used to verify the correlation service of new technology, and the result has shown that the user of drone distribution delivery service has a causal relationship with individual innovation and that the accommodation behavior and intention of use have a causal relationship with economic efficiency and convenience. However, there was no causal relation from a perceived risk. Hence, based on the results of study about accommodation behaviors and intention of use of the end users of drone distribution delivery service, the marketing implications have been provided for commercialization of drone delivery service.

• Journal of Convergence for Information Technology
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• v.7 no.3
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• pp.55-64
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• 2017

This study was to develop a dementia prevention integration program and apply to elderly women living alone to evaluate the applicability of the program. Fifty-six participants who enrolled at local public health centers were assigned. The control and experimental groups were assigned to 28 subjects. As a result of the study, the integrated program for prevention of dementia showed that the experimental group was more effective as the self-practice program than the control group. Therefore, This program is considered to be a self-practice integrated dementia prevention program. In the future, this program should be revised and supplemented and extended to the local community, So it is necessary to seek a nursing intervention strategy that subjects can continuously practice.

• Journal of Convergence for Information Technology
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• v.8 no.2
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• pp.141-148
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• 2018

The purpose of this paper is to explore the scope of realization of multiple perspectives so that the implementation of the right to be forgotten is more realistic than the ideal information deletion concept. We examined domestic and foreign legal system and technology/service trends, and reflected the classification realization level of service realization, processing type and information characteristics of personal information processor, and legislative/technical factors for multi-level scope analysis. As a result, we have presented a matrix of the range of realization of the right to be forgotten and the scope of diversified regulation by the subject of protection. This study will be extended to the convergence of law and engineering, and will contribute to the prediction of social costs and expansion of the market by identifying the scope of 'deletion rights'.

• Journal of Convergence for Information Technology
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• v.10 no.1
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• pp.13-21
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• 2020

Due to the dramatic improvement of Internet technologies and digital content authoring, many independent media creators produce various digital items and share them with others. In this situation, the independent media platforms must support the well-defined usage rights(licenses) specification, usage monitoring, and license trading trace for enabling complex types for selling, buying, using and reproducing digital items created by independent media creators. In this paper, we design an extended policy model based on the ODRL policy class model and implement a user interface prototype to specify multi types of usage rights like use, own, share, and cede. Our proposed model can be referenced to create license management modules of the independent media platforms.

• Journal of Convergence for Information Technology
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• v.10 no.1
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• pp.22-27
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• 2020

With the deployment of 5G infrastructure, content delivery network (CDN) will be a key role to provide explosive growing services for the independent media and YouTube which contain high-speed mobile contents. Without a local cache, the mobile backhaul and fronthaul should endure huge burden of bandwidth request for users as the increase number of direct accesses from contents providers. To deal with this issue, this paper fist presents both fronthaul solutions for CDN that use dark fibers and a passive optical network (PON). On top of that, we propose the aggregated content request specialized for PON caching and evaluate and compare its performance to legacy schemes through the simulation. The proposed PON caching scheme can reduce average access time of up to 0.5 seconds, 1/n received request packets, and save 60% of backhaul bandwidth compared to the no caching scheme. This work can be a useful reference for service providers and will be extended to further improve the hit ratio of cache in the future.

• Journal of Convergence for Information Technology
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• v.10 no.3
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• pp.58-66
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• 2020

This paper aims to empirically analyze the factors of difference in trust level for Internet-only bank by age groups. The purpose of this study is to provide clues and a research data in developing differentiation strategies that can increase consumer's trust by age group. In this study, above all, the financial consumer group was divided into the 2030s and 4050s based on age. The study explored the trust determinants of the two groups and compared the differences between the two groups using a multi-group analysis method. As results, in all age groups, financial consumer's trust was seen as a determinant of convenience, security and benefit of financial transaction costs. The difference of the determinant of trust between 2030s and 4050s occurred in the factor of benefit. Moreover, it reconfirmed that consumer's trust is later strongly extended to relationship commitment. These findings suggest that trust is of paramount importance to the Internet-only bank, whose market competition will intensify in the future.

• Journal of Convergence for Information Technology
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• v.9 no.10
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• pp.71-80
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• 2019

The purpose of this study is to analyze the effects of brand evidence on brand value, brand trust, brand attitude and word of mouth intention. To achieve the purpose of the study, a research model and hypothesis were established based on previous studies, and survey was conducted on 222 passengers who had used the airline. As a result of the analysis, sub-factors of airline brand evidence had a positive impact on brand value. Except for employee services, perceived prices, core services, brand names, and brand logo had a positive impact on brand value. Brand value had a significant positive effect on brand trust and brand attitude. It was also found that brand trust had a significant influence on brand attitude. This study examined the extended range by adding the brand logo as a sub-factor of brand evidence, and it is considered necessary to study including brand emotion in next study.

• Journal of Convergence for Information Technology
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• v.8 no.3
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• pp.99-105
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• 2018

The purpose to this study is to analyze the difference of trust toward Internet-only bank into two groups according to the gender. We specially examined whether there is any gap in the determinant of trust. For this, we attempted to analyze the significance of the difference in the path coefficients between the gender through latent mean and path analysis. As a results, the difference of the determinant of trust between the male and the female group occurred in the factor of benefit and security. Moreover, it reconfirmed that trust are later strongly extended to relationship commitment. These findings suggest that it's very important to establish a trust with customers.