• Information Systems Review
• /
• v.21 no.3
• /
• pp.87-110
• /
• 2019

The Fintech services provide innovation to financial services users using various mobile devices and computers in wired and wireless communication environments. In this study, we develope a theoretical research framework to explain the psychology of Fintech services users based on a cognitive, affective, and conative framework. Using this framework, this study analyzes the relationships between the cognitive characteristics (i.e., innovation, relative advantage, ease of use, and usefulness), emotional characteristic (i.e., attitude), and behavioral characteristic (i.e., actual use) toward Fintech services users. This study conducted an online survey of people who have experienced using Fintech services. And the data of the collected Fintech services users was analyzed using structural equation model software (i.e., SMART PLS 2.0 M3). The results of the empirical analysis show the relationships between innovation, relative advantage, perceived usefulness, perceived ease of use, attitude, and actual use of Fintech service users. The results of this study provide useful information to improve the practical use of Fintech services users in the Internet of Things (IoT) environment.

• Journal of the Korean Dietetic Association
• /
• v.30 no.2
• /
• pp.140-151
• /
• 2024

This study evaluated the effectiveness of an obesity program developed to solve 'obesity', which was selected as the top priority for urgent improvement among the dietary problems of elementary school students in Busan. The program aimed to practice four health rules every day (sleep early, eat two vegetables with each meal, reduce sugary snacks, and exercise for 30 minutes every day). The participants were trained to practice the four rules online in real time every day for three weeks, and their performance in nutrition education tasks was monitored using Padlet. The anthropometric measurements showed no change in the overall average weight before and after participating in the program, but all students grew in height (z=-6.978, P<0.001), and the number of obese students decreased significantly (z=-3.317, P<0.001). This obesity program was effective in improving height growth and obesity in elementary school students. In terms of dietary changes, after participating in the program, the frequency of vegetable consumption increased significantly (z=-4.849, P<0.001), the frequency of sweet snack consumption decreased significantly (z=-4.298, P<0.001), and the bedtime improved (z=-1.000). Therefore, the non-face-to-face, self-directed obesity program developed in this study is expected to reduce the workload of nutrition teachers carrying a heavy workload such as meal service and nutrition classes, and can be used as an efficient nutrition counseling program.

• Information Systems Review
• /
• v.18 no.3
• /
• pp.31-50
• /
• 2016

This study investigates the impact of social-face sensitivity of smartphones on the adoption of iPhone in China. Social-face sensitivity is divided into three dimensions, namely, other-directed sensitivity, self-directed sensitivity, and formality-directed sensitivity. We surveyed 218 university students in China through an online survey site. The results showed that formality-directed and other-directed sensitivity have significant impacts on iPhone preferences. Self-directed sensitivity was not significant. We investigated two moderate variables, namely, financial ability and brand sensitivity. Both variables showed significantly moderate impacts on the intention to purchase iPhone. The impact of social-face sensitivity on iPhone preferences implies that the iPhone has dual characteristics to the Chinese, namely, as utility and luxury goods. This finding offers managerial implications for Apple and other mobile service companies in terms of production and marketing strategies.

• Journal of Practical Engineering Education
• /
• v.16 no.3_spc
• /
• pp.327-332
• /
• 2024

The spread of smart phones provides users with a variety of services, making their lives more convenient. In particular, financial transactions can be easily made online after user authentication using a smart phone. Users easily access the service by authenticating using a PIN, but this makes them vulnerable to social engineering attacks such as spying or recording. We aim to increase security against social engineering attacks by applying the authentication method including imaginary numbers when entering a password at the door lock to smart phones. Door locks perform PIN authentication within the terminal, but in smart phones, PIN authentication is handled by the server, so there is a problem in transmitting PIN information safely. Through the proposed technique, multiple PINs containing imaginary numbers are generated and transmitted as processed values such as hash values, thereby ensuring the stability of transmission and enabling safe user authentication through a technique that allows the PIN to be entered without exposure.

• The Korean Journal of Emergency Medical Services
• /
• v.28 no.2
• /
• pp.7-19
• /
• 2024

Purpose: To adjust item numbers in a national test, this study used item response theory to examine changes in average scores, reliability, difficulty, and discrimination according to the adjustment of item numbers. Methods: We analyzed the dichotomous coding of correct and incorrect answers of 473 examinees in a mock test conducted in 2023. Additionally, as an explanatory pilot study, we used an online questionnaire to survey experts on their perceptions of the appropriate item numbers for each test subject from January 18, 2024, to February 15, 2024. Results: Regarding the item numbers on the national exam, experts preferred to reduce the number of management of emergency patients (33.14±6.09, p<.05) and advanced emergency medical care: subtopics (104.49±11.55, p<.05), and the total number of questions (217.82±20.95, p<.05). In a simulation set in which items with low item fit were removed after fitting a two-parameter item response theory model, reliability was maintained at .910 until the 5th test consisting of 185 questions with little loss of difficulty, discrimination, and average score, and there was no correlation between item numbers and average score. Conclusion: Experts responded that reducing the number of items on the national exam was appropriate. As a result of the item reduction simulation, there was no significant loss in the average score, difficulty, discrimination, or reliability. More reliable results could be obtained if the results were based on a validity analysis and analyzed using actual national exams.

• Information Systems Review
• /
• v.26 no.1
• /
• pp.119-149
• /
• 2024

This study investigates the antecedents and mechanisms influencing trust and behavioral intentions formation towards new AI chatbots, such as ChatGPT, as travel information searching services. Analyzing the roles of variables such as familiarity, novelty, personal innovativeness, information quality and perceived anthropomorphism, the research elucidates the impact of these factors on users' cognitive and affective trust, ultimately affecting their intention to adopt information and sustain the use of the AI chatbot. Results indicate that perceived familiarity and information quality positively influence both cognitive and affective trust, whereas perceived novelty contributes positively only to cognitive trust. Additionally, the personal innovativeness of new AI chatbot users was found to weaken the effect of familiarity on perceived trust, while the perceived level of anthropomorphism of the chatbot amplified the effects of novelty and familiarity on cognitive trust. These findings underscore the importance of considering factors such as familiarity, personal innovativeness, information quality and anthropomorphism in the design and implementation of AI chatbots, affecting trust and behavioral intention.

• Journal of the Korea Society of Computer and Information
• /
• v.29 no.10
• /
• pp.11-19
• /
• 2024

Online and mobile reviews strongly influence consumer behavior, especially in the service industry, and play a key role in determining customer retention and revisit rates. Systematically analyzing the information in these reviews can effectively assess how they directly influence customers' purchase decisions. In this study, we applied the existing KNU sentiment dictionary to food and beverage (F&B) review data to build a customized sentiment lexicon using N-grams based on about 10,000 reviews. Comparing its performance with the existing dictionary, we found that the sentiment lexicon generated using the 1-gram, 2-gram, and 3-gram models had the highest accuracy, precision, recall, and F1 scores. These results can serve as a powerful business support tool for SMEs in the F&B and grocery shopping sector, also be used to predict customer demand for technology and policy.

• Journal of Korea Society of Industrial Information Systems
• /
• v.29 no.5
• /
• pp.95-112
• /
• 2024

OTT, transcending traditional set-top boxes, signifies a burgeoning platform that facilitates real-time video content streaming on user-friendly devices via the internet, thereby supplanting TV and movie services. This study aims to enhance the sustainability of OTT platforms in the highly competitive OTT industry by emphasizing the value of personalization and socialization in OTT services.The study focused on adult consumers using OTT services, securing 340 samples through an online survey for hypothesis testing. The hypothesis testing results suggest increased consumers' hedonic and functional value due to the content richness, content recommendation, and device diversity on OTT. Additionally, these values and social values have amplified the continuous usage intention. Furthermore, social value interacts with hedonic and functional values, enhancing the intention for continuous usage. Similarly, the susceptibility to informational influence also interacts with social value, reinforcing this usage intention. This study elucidates the value factors desired by OTT consumers, suggesting strategies for value enhancement at both platform and individual levels, thereby aiding in developing tailored strategies for OTT platforms to cater to consumer needs.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.35 no.3
• /
• pp.227-246
• /
• 2024

This study aims to identify the current usage patterns of VR content among users and their demands for VR content services in libraries. An online survey was conducted, receiving responses from 229 individuals with experience using VR content. The Technology Acceptance Model (TAM) analysis revealed a good model fit, indicating that users' perceptions of the usefulness and ease of use of VR content are significantly related to their satisfaction and intention to reuse VR content. These findings suggest that to enhance satisfaction with VR content services in libraries, it is essential to improve user convenience and create an immersive environment. Additionally, respondents indicated that VR content services could increase library user satisfaction and the intention to revisit the library. The most preferred VR content themes were games (action, strategy, etc.), travel, and space/ocean, in that order. While the overall feedback on providing VR content services in libraries was positive and filled with anticipation, some respondents expressed concerns about the potential lack of utility and the possibility of poor equipment management.

• Journal of Practical Engineering Education
• /
• v.16 no.5_spc
• /
• pp.677-688
• /
• 2024

This study aims to analyze differences in digital literacy according to demographic characteristics among university professors and students, and between the two groups. An online digital literacy assessment was conducted through the teaching and learning center websites of universities located in Seoul, Incheon, and Chungcheong provinces. A total of 1,308 university students and 102 professors participated in the study. Data analysis was performed using t-tests and ANOVA with SPSS Ver. 23. The findings revealed statistically significant differences in digital literacy total scores based on gender, academic field, and years of service in teaching for professors, except for rank. For students, significant differences were observed based on gender, grade level, academic major, and birth year. Professors demonstrated higher overall digital literacy, including competencies in adapting to software-centric societies and using SNS for collaboration, compared to students. However, students scored higher than professors in basic office tool proficiency.