• International Journal of Computer Science & Network Security
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• v.21 no.4
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• pp.255-263
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• 2021

Smart grid is a fully-automated, bi-directional, power transmission network based on the physical grid system, which combines sensor measurement, computer, information communication, and automatic control technology. Blockchain technology, with its security features, can be integrated with Smart Grids to provide secure and efficient power management and transmission. This paper dicusses the deployment of Blockchain technology in Smart Grid. It presents application areas and protocols in which blockchain can be applied to in securing smart grid. One application of each area is explored in detail, such as efficient peer-to-peer transaction, lower platform costs, faster processes, greater flexibility in power generation to transmission, distribution and power consumption in different energy storage systems, current barriers obstructing the implementation of blockchain applications with some level of maturity in financial services but concepts only in energy and other sectors. Wide range of energy applications suggesting a suitable blockchain architecture in smart grid operations, a sample block structure and the potential blockchain technicalities employed in it. Also, added with efficient data aggregation schemes based on the blockchain technology to overcome the challenges related to privacy and security in the smart grid. Later on, consensus algorithms and protocols are discussed. Monitoring of the usage and statistics of energy distribution systems that can also be used to remotely control energy flow to a particular area. Further, the discussion on the blockchain-based frameworks that helps in the diagnosis and maintenance of smart grid equipment. We have also discussed several commercial implementations of blockchain in the smart grid. Finally, various challenges have been discussed for integrating these technologies. Overall, it can be said at the present point in time that blockchain technology certainly shows a lot of potentials from a customer perspective too and should be further developed by market participants. The approaches seen thus far may have a disruptive effect in the future and might require additional regulatory intervention in an already tightly regulated energy market. If blockchains are to deliver benefits for consumers (whether as consumers or prosumers of energy), a strong focus on consumer issues will be needed.

• Journal of the Korea Society of Computer and Information
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• v.26 no.3
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• pp.147-154
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• 2021

The purpose of this study is to analyze the impact about emotional labor of sales service workers. Collected data were statistically processed by PASW 18.0 program using reliability, frequency analysis, T-test, one-way ANOVA, correlation and multiple regression analysis. The results were as follows. First, it was found that the sales service workers had higher deep acting than the surface acting of emotional labor. Second, it was found that altruism differed according to working period, conscientiousness according to gender, and work-family conflict according to age, marital status, and average customer response time per day. Third, the higher the surface acting of emotional labor, the higher the altruism. And the higher the deep acting, the less job burnout and work-family conflict decreased, and the altruism and conscientiousness increased. Fourth, as a result of analyzing the relative influence of variables related to emotional labor, the variable that has the greatest influence was the deep acting of emotional labor.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.43 no.4
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• pp.1-14
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• 2020

Recently, M/G/1 priority queues with a finite buffer for high-priority customers and an infinite buffer for low-priority customers have applied to the analysis of communication systems with two heterogeneous traffics : delay-sensitive traffic and loss-sensitive traffic. However, these studies are limited to M/G/1 priority queues with finite and infinite buffers under a work-conserving priority discipline such as the nonpreemptive or preemptive resume priority discipline. In many situations, if a service is preempted, then the preempted service should be completely repeated when the server is available for it. This study extends the previous studies to M/G/1 priority queues with finite and infinite buffers under the preemptive repeat-different and preemptive repeat-identical priority disciplines. We derive the loss probability of high-priority customers and the waiting time distributions of high- and low-priority customers. In order to do this, we utilize the delay cycle analysis of finite-buffer M/G/1/K queues, which has been recently developed for the analysis of M/G/1 priority queues with finite and infinite buffers, and combine it with the analysis of the service time structure of a low-priority customer for the preemptive-repeat and preemptive-identical priority disciplines. We also present numerical examples to explore the impact of the size of the finite buffer and the arrival rates and service distributions of both classes on the system performance for various preemptive priority disciplines.

• The Journal of the Convergence on Culture Technology
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• v.7 no.3
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• pp.231-239
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• 2021

The purpose of this study is to verify the effectiveness of service quality on satisfaction factors, and to provide practical information on the management of Taekwondo Dojang nationwide, which are facing difficulties due to the decrease in trainees and COVID-19. In this study, 11 studies were selected from January 2010 to December 2020. The conclusion is as follows. First of all, it has been confirmed that the overall influence of Taekwondo dojo service on satisfaction is moderate. Second, the effectiveness of low-quality service on satisfaction (painting, customers, trainees) was the highest, and there was no significant difference between the factors in order of confidence, response, empathy and reliability. Third, the quality, effectiveness and satisfaction of the satisfaction type were the greatest, and the satisfaction of the trainees was the coating and customer satisfaction.

• Journal of Digital Convergence
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• v.20 no.4
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• pp.269-278
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• 2022

Recently, the travel and lodging industries have been suffering from the spread of COVID-19. But Airbnb recovered its profits with a differentiated strategy. This study identified the characteristics of Airbnb and examined their effects on customer's revisit intention in the Airbnb context. Perceived value, trust about Airbnb, and social norms were considered as the key factors of revisit intention. In addition, the effects of relative attractiveness, brand identification, and enjoyment on perceived value and trust about Airbnb were examined. The proposed research model was tested based on 285 consumers who had Airbnb experience more than twice. The analysis results showed that relative attractiveness, brand identification, and enjoyment had a significant influence on perceived value and trust. Perceived value had a significant influence on revisit intention. However, trust about Airbnb and social norms did not significantly affect revisit intention. Moreover, ths analysis results found no significant moderating effect of share of wallet. Based on the results of this study, Airbnb would establish effective marketing and operation strategies by understanding the formation mechanism of consumer's revisit intention toward Airbnb.

• Journal of Information Technology Services
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• v.20 no.5
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• pp.137-146
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• 2021

Recently, public participation in government policy design has been further expanded and public services perceived by users are expanding. At this time, the role of the digital government and the direction of the service to be pursued are user-centered, and above all, it is necessary to focus on the keywords of pre-emptive, preventive, and customized. In order to propose service quality improvement in the public sector, service user-centered classification and monitoring are integrated and the usability of government documents is improved. It is necessary to identify the needs of whether to provide a path for public participation. In the post-corona era, people are accessing quarantine information from the digital government every day. The government should proactively respond to the acceleration of digital transformation and the non-face-to-face demands of the people who experience non-face-to-face daily life. In order to evolve into a smart organization along with the innovation promotion plan and to provide customized services, it is necessary to use existing guides for institutional and technical improvement, along with new technology and data-based analysis, to strive for change management. The government should seek counter-measures that have advanced one step ahead by incorporating new high-tech IT with user-centered necessary services. This study aims to derive improvement plans to provide user-centered digital government service design when designing public services and collecting public opinions. Based on the e-government development model research and the existing research on user-centered service design in the public sector, institutional and technical measures are provided for the improvement of digital government service design.

• Journal of Industrial Convergence
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• v.20 no.6
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• pp.117-123
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• 2022

Appearance, which is directly related to competitiveness, has become one of the essential self-care for modern people living in the era of the 4th industrial revolution. For the purpose of producing more practical and convenient wigs for suffering customers, data of research subjects were collected through an information search portal site. The trend of new material development of leading wig companies was analyzed. As a result of the study, it was found that many applications for wig attachment and binding technology were applied before 2005, artificial hair-related manufacturing technology for wigs from 2006 to 2013, and functional-related wig technology after 2014. In addition, both H and M companies showed the development trend of new materials for shape memory materials and nanoskins with their own characteristics. We believe that this study will be provided as basic data for the development of functional wigs that can lead to customer satisfaction while providing customers with a comfortable and convenient fit in the wig industry market.

• Journal of East-West Nursing Research
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• v.28 no.2
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• pp.91-99
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• 2022

Purpose: The purpose of this study was to compare compliance with standard precautions of infection prevention between nurses at accredited Korean medicine hospitals and non-accredited Korean medicine hospitals. Methods: Data were collected from a total of 138 participants (69 nurses from 3 accredited hospitals and 69 nurses from 3 non-accredited hospitals) in January of 2021 using structured questionnaires. Descriptive statistics, t-test, one-way ANOVA, and multiple regression analyses were carried using the SPSS Statistics 24.0 Program. Results: Results showed that the scores of nurses' compliance with standard precautions of infection prevention at accredited Korean medicine hospital (40.54±2.74) were significantly higher (p=.002) than the scores of nurses at the non-accredited Korean medicine hospitals (38.94±3.28). After controlling for covariates, the results were same. In addition, we found that scores of compliance with standard precaution for infection prevention in nurses at hospitals belong to university were significantly high compared to those of nurses at private hospitals. We also found that the scores of compliance with standard precaution for infection prevention in nurses with more than 5 years of experience were significantly higher than those of nurses with less than 3 years of experience (p=.039). Conclusion: Nurses working at the accredited Korean medicine hospitals showed higher scores of compliance with standard precaution for infection prevention. Therefore, it is suggested that the participation in the hospital accreditation program should be encouraged for the Korean medicine hospitals.

• Journal of Internet of Things and Convergence
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• v.8 no.5
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• pp.47-54
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• 2022

The development of the Internet of Things led to new services that did not exist before. This required a change to the existing network. This study aims to verify the service quality, satisfaction, repurchase intention relationship, and the moderating effect of online reviews of Chinese consumers using fashion shopping malls. The results of the study showed that from the perspective of consumers in their 20s and 30s in China, the type, reliability, convenience, and interaction of service quality had a positive effect on customer satisfaction and repurchase intention. In addition, negative reviews among online reviews had a great influence on repurchase intention. Based on the results of the study, it will help improve the effect on online product reviews and in-depth understanding of the acceptance of online product reviews for online fashion shopping malls, and establish strategies for fashion companies to effectively manage online product reviews information.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.31 no.4
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• pp.675-686
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• 2021

According to the recent revision of Privacy Policy and the emerging importance of personal information, cooperations must verify customer identity (Know Your Costomer, KYC) while processing and managing this information so that it does not violate the Privacy Policy. One of the solution of this problem is zero-knowledge proof (ZKP). The use of the ZKP enables to verify the identity without exposing the identity information directly, thereby reducing the burden on the management of personal information while fulfilling the obligation of the cooperations to verify the identity. The ZKP could be employed to many other applications. In this paper, we analyze the ZKP technique and its applications currently being actively studied.