• Journal of Practical Engineering Education
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• v.15 no.3
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• pp.641-647
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• 2023

In the fintech environment, ensuring secure financial transactions with smartphones requires authenticating the device owner. Smartphone authentication techniques encompass a variety of approaches, such as passwords, biometrics, SMS authentication, and more. Among these, password-based authentication is commonly used and highly convenient for user authentication. Although it is a simple authentication mechanism, it is susceptible to eavesdropping and keylogging attacks, alongside other threats. Security keypads have been proposed to address vulnerabilities in password input on smartphones. One such innovation is a group keypad, resistant to attacks that guess characters based on touch location. However, improvements are needed for user convenience. In this study, we aim to propose a method that enhances convenience while being resistant to eavesdropping and recording attacks on the existing group keypad. The proposed method uses new signs to allow users to verify instead of the last character confirmation easily and employs dragging-to-touch for blocking recording attacks. We suggest diverse positioning methods tailored for domestic users, improving efficiency and security in password input compared to existing methods.

• Advances in nano research
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• v.15 no.4
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• pp.355-366
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• 2023

Biological corrosion, a crucial aspect of metal degradation, has received limited attention despite its significance. It involves the deterioration of metals due to corrosion processes influenced by living organisms, including bacteria. Soil represents a substantial threat to pipeline corrosion as it contains chemical and microbial factors that cause severe damage to water, oil, and gas transmission projects. To combat fouling and corrosion, corrosion inhibitors are commonly used; however, their production often involves expensive and hazardous chemicals. Consequently, researchers are exploring natural and eco-friendly alternatives, specifically nano-sized products, as potent corrosion inhibitors. This study aims to environmentally synthesize silver nanoparticles using an extract from Lagoecia cuminoides L and evaluate their effectiveness in preventing biological corrosion of buried pipes in soil. The optimal experimental conditions were determined as follows: a volume of 4 ml for the extract, a volume of 4 ml for silver nitrate (AgNO3), pH 9, a duration of 60 minutes, and a temperature of 60 degrees Celsius. Analysis using transmission electron microscopy confirmed the formation of nanoparticles with an average size of approximately 28 nm, while X-ray diffraction patterns exhibited suitable peak intensities. By employing the Scherer equation, the average particle size was estimated to be around 30 nm. Furthermore, antibacterial studies revealed the potent antibacterial activity of the synthesized silver nanoparticles against both aerobic and anaerobic bacteria. This property effectively mitigates the biological corrosion caused by bacteria in steel pipes buried in soil.

• Journal of Fashion Business
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• v.27 no.5
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• pp.121-134
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• 2023

With the development of information and communication technology, interest in new educational approaches that can enhance the learning performance of learners with improved information literacy skills is increasing, and universities are actively promoting educational innovation to foster the talents required by society. In the field of fashion studies education, which is closely related to the fashion industry, there is a strong need to develop field-linked educational programs that reflect the trends in the industry and changes in the educational system. The purpose of this study was to introduce industry-coupled problem-based learning (IC-PBL) to the course "Understanding Fashion Consumption Trends" for non-fashion majors to reflect the current needs and strengthen the educational effectiveness of the learners through a survey. A seven-step curriculum (introduction to the class, practitioner's problem, learner's problem analysis, organizing concepts related to variables, information collection and scenario writing, presentation and scenario proposal, and evaluation) not only enhanced learners' understanding of fashion consumption trends and the fashion industry but also greatly amplified learners' satisfaction with the class. The results of the survey showed that the seven-step curriculum was effective in increasing learners' self-directed learning ability, problem-solving ability, and confidence in learning. Self-directed learning ability was stronger than other factors, consistent with the core principle of problem-based learning to empower learners to take the initiative and promote self-directed learning. Each factor analyzed was positively correlated.

• The Journal of Korean Academic Society of Nursing Education
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• v.30 no.1
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• pp.61-70
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• 2024

Purpose: This study aimed to identify the factors influencing nursing students' intentions to report child abuse. Methods: The participants of this study were 151 nursing students who were currently enrolled in nursing departments in Korea and who were at least 18 years of age or older. This study used a descriptive cross-sectional design, and the data were collected from February 16, to March 13, 2023, using an online self-administered survey. The questionnaire included general characteristics, empathy ability, child rights recognition, child abuse perception, and intention to report child abuse. The data were analyzed with descriptive statistics, an independent t-test, one-way ANOVA, Scheffé test, and multiple regression analysis using SPSS Statistics 29.0. Results: The intention to report child abuse showed statistically significant positive correlations with empathy ability (r=.23, p<.001), child rights recognition (r=.34, p<.001), and child abuse perception (r=.63, p<.001). In the multiple regression analysis, the factors significantly related to nursing students' intention to report child abuse were as follows: awareness of mandatory reporting (yes) (β=.16, p=.021) and child abuse perception (β=.56, p<.001). The explanatory power of these factors was 45.0% (F=20.03, p<.001). Conclusion: Considering the findings of this study, it is necessary to develop and implement educational programs for improving the perception of child abuse and thus enhancing nursing students' intention to report child abuse.

• Human Ecology Research
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• v.62 no.1
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• pp.101-120
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• 2024

This study aimed to examine the effect of adolescents' perceived parental blame (criticism) on learned helplessness and to examine whether maladaptive metacognitive beliefs and rumination sequentially mediate the relationship between parental blame and learned helplessness. The participants were 316 adolescents (Mean age=16.7, SD=0.75; 137 male, 179 female) attending grades 1st and 2nd in high school in South Korea. The participants were selected using a snowball sampling method, while the data was collected via an online self-report questionnaire. This survey was completed by the participants and analyzed using SPSS 28.0, Amos 26.0 (IBM Co., Armonk, NY), and PROCESS macro version 4.2 (Model 6; Hayes, 2022). The main results are summarized as follows. Firstly, the adolescents' perceived paternal and maternal blame indicated significant direct effects on learned helplessness. Secondly, rumination mediated the effect of paternal and maternal blame on learned helplessness. Lastly, paternal and maternal blame significantly affected learned helplessness through the sequential mediating effects of maladaptive metacognitive beliefs and rumination. This study elucidates the causal structure among the various factors influencing learned helplessness in adolescents, focusing on parental blame, maladaptive metacognitive beliefs, and rumination. Furthermore, considering the verified sequential mediating effects of maladaptive metacognitive beliefs and rumination in the relationship between adolescents' perceived parental blame and learned helplessness, these findings suggest that modifying maladaptive metacognitive beliefs may help to reduce learned helplessness among adolescents who perceive high levels of parental blame.

• Human Ecology Research
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• v.62 no.1
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• pp.151-164
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• 2024

This study examined the effects of perceived discrimination on multicultural adolescents regarding feelings of conflict over their ethnic identity by investigating the moderating role of father-child open communication and mother-child open communication mediated by bicultural competence. A total of 234 middle school students (grades 7-8; 139 girls and 95 boys) from multicultural families, from which the father is Korean and the mother is not, participated in the study. Data was collected through an online self-report questionnaire and was analyzed via SPSS 26.0 and Process (Version 4.1) MACRO. The results can be summarized as follows. First, bicultural competence mediated the effects of perceived discrimination on feelings of conflict over one's ethnic identity. Enhanced bicultural competence resulting from a lower perception of discrimination contributed to a reduction in feelings of conflict over one's ethnic identity. Second, the moderated mediation effect of fatherchild open communication was significant, while the effect of mother-child open communication was not. Thus, the mediation relationship (lower perceived discrimination increased bicultural competence and, thus, reduced conflict over one's ethnic identity) grew stronger as the level of father-child open communication increased. The significance of this study lies in uncovering the causal relationships between individual and environmental factors that contribute to ethnic identity development among multicultural adolescents, particularly highlighting the important role of Korean fathers within multicultural households.

• Animal Bioscience
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• v.37 no.6
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• pp.1130-1139
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• 2024

Objective: The daily maximum temperature and seawater level continuously increase as global warming continues. We examined the adaptability and production performance of heat-stressed goats with a supply of low-saline drinking water. Methods: Twelve Kacang and Kacang Etawah cross goats were exposed to two climatic conditions (control, 25℃ to 33℃, 83% relative humidity [RH], temperature humidity index [THI]: 76 to 86; and hot environment, 26℃ to 39℃, 81% RH, THI: 77 to 94) and two salt levels in drinking water (0% and 0.4% NaCl). The experimental design was a Latin Square (4×4) with four treatments and four periods (28 days each). Results: Temperature of the rectal, skin, and udder, and respiration rate rose, reached a maximum level on the first day of heat exposures, and then recovered. Plasma sodium rose at 0.4% NaCl level, while the hot environment and salinity treatments increased the drinking water to dry matter (DM) intake ratio. Water excretion was elevated in the hot environment but lowered by the increase in salinity. Total lying time increased, whereas change position frequency decreased in the hot condition. Lying and ruminating and total ruminating time increased and explained the enhanced DM digestibility in the hot conditions. Conclusion: The goats exhibited a high level of plasma sodium as salinity increased, and they demonstrated physiological and behavioral alterations while maintaining their production performances under increasing daily maximum temperatures.

• IMMUNE NETWORK
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• v.24 no.1
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• pp.9.1-9.21
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• 2024

The cytokine IL-7 plays critical and nonredundant roles in T cell immunity so that the abundance and availability of IL-7 act as key regulatory mechanisms in T cell immunity. Importantly, IL-7 is not produced by T cells themselves but primarily by non-lymphoid lineage stromal cells and epithelial cells that are limited in their numbers. Thus, T cells depend on cell extrinsic IL-7, and the amount of in vivo IL-7 is considered a major factor in maximizing and maintaining the number of T cells in peripheral tissues. Moreover, IL-7 provides metabolic cues and promotes the survival of both naïve and memory T cells. Thus, IL-7 is also essential for the functional fitness of T cells. In this regard, there has been an extensive effort trying to increase the protein abundance of IL-7 in vivo, with the aim to augment T cell immunity and harness T cell functions in anti-tumor responses. Such approaches started under experimental animal models, but they recently culminated into clinical studies, with striking effects in re-establishing T cell immunity in immunocompromised patients, as well as boosting anti-tumor effects. Depending on the design, glycosylation, and the structure of recombinantly engineered IL-7 proteins and their mimetics, recombinant IL-7 molecules have shown dramatic differences in their stability, efficacy, cellular effects, and overall immune functions. The current review is aimed to summarize the past and present efforts in the field that led to clinical trials, and to highlight the therapeutical significance of IL-7 biology as a master regulator of T cell immunity.

• Journal of Distribution Science
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• v.22 no.4
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• pp.11-22
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• 2024

Purpose: This research delves into the various factors that influence the performance of restaurant businesses on social commerce platforms in Bangkok, Thailand. The study considers both internal and external factors, including but not limited to business characteristics and location. Moreover, this research also analyzes the effects of employing multiple social commerce platforms on business efficiency and explores the underlying reasons for such effects. Research design, data, and methodology: Restaurants can be classified into different price ranges: low, medium, and high. To further investigate, we employed natural language processing AI to analyze online reviews and evaluate algorithm performance using machine learning techniques. We aimed to develop a model to gauge customer satisfaction with restaurants across different price categories effectively. Results: According to the research findings, several factors significantly impact restaurant groups in the low and mid-price ranges. Among these factors are population density and the number of seats at the restaurant. On the other hand, in the mid-and high-price ranges, the price levels of the food and drinks offered by the restaurant play a crucial role in determining customer satisfaction. Furthermore, the correlation between different social commerce platforms can significantly affect the business performance of high-price range restaurant groups. Finally, the level of online review sentiment has been found to influence customer decision-making across all restaurant types significantly. Conclusions: The study emphasizes that restaurants' characteristics based on their price level differ significantly, and social commerce platforms have the potential to affect one another. It is worth noting that the sentiment expressed in online reviews has a more significant impact on customer decision-making than any other factor, regardless of the type of restaurant in question.

• Journal of Platform Technology
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• v.12 no.1
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• pp.67-76
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• 2024

Small and medium-sized enterprises play a fundamental role in the foundation of our country's industry and economy, and most technological innovations occur in small and medium-sized enterprises rather than large corporations. Technology development and innovation are the only way for small and medium-sized enterprises to survive in a fiercely competitive environment, so they focus on it, but interest and investment in technology protection tend to be stingy. As a result, industrial technology leakage accidents occur frequently, and it is difficult to meet improvement measures. When a leak occurs, digital evidence is required to prove criminal activity, but problems such as digital evidence being damaged or deleted due to management loopholes often occur. Therefore, through this study, we aim to design a digital evidence-based countermeasure depending on the type of technology leak accident. We will classify the types of technology leak incidents that actually occurred and study ways to secure digital evidence in the security environment of small and medium-sized businesses that operate internal information leak prevention solutions.