The Society of Convergence Knowledge Transactions ISSN:2287-8920(Print) 융복합지식학회논문지

Paper-based strain sensors produced based on printed electronics have a variety of applications for slowly changing deformation, heavy-loaded structures, or extreme events. Especially resistance-based sensors which can be used in wearable devices, are affected by printability. In this study, a strain sensor based on GF 20 or higher was fabricated using the Ag/CNT screen printing process, and the sensor fabrication and sensing effects were systematically analyzed according to its printability. As a result, when the gap between mesh and sbustrate is increased from 0.38 to 0.5 mm, line width decreases from 546 um to a maximum of 396 um. As the confirmed squeegee approaches the screen mesh from 5 mm to 9 mm, the pattern width increases from 581 to 721 um. In addition, it can be seen that the resistance value decreases from 352 Ω to 100 Ω when drying temperature increased from 100°C to 220°C, which is attributed to the bonding structure of Ag/CNTs and creates a sensitivity difference. Through this, it is considered a number of meaningful basic data for the development of paper-based strain sensor technology as a screen printing process.

Fogs are known to affect the driver’s driving behavior, hinder traffic flow, and increase the risk of traffic accidents. In fact, traffic accidents caused by fog lead to large-scale traffic accidents, and it is urgent to come up with active safety measures in the road sector in response to the fog. Fog-dissipating technology is an essential element that can minimize economic losses not only from road traffic but also from delays, departures and cancellations of aircraft operations, and research and development is urgently needed. The idea is to improve the dissipation of fog by using specific frequencies of thermal sound waves generated by rapidly heating compressed fluids placed in a certain space. In this study, experiments were conducted on the effect of resonator length and voltage on the frequency of thermosound waves to be applied to fog dissipation. The frequency and dB generated after changing the length and supply voltage of the resonator while the position of the stack and the diameter of the resonator were fixed were measured and the change was confirmed. Experiments show that variables on the frequency of thermal sound waves are higher frequencies with shorter resonators, and these experimental results are believed to be available as basic data for heat sound waves during fog dissipation.

This paper examined how the personalized service and customized service perceived by subscription service users affect customer satisfaction and purchase intention in situation where consumers’ attitudes and behaviors are rapidly changing due to the COVID- 19 incident. And it aims to check whether there is a difference between Generation Z and Millennial in this influence relationship. The data collected from 242 users of the subscription service were verified with a structural equation modeling (SEM). As a result of analysis, first, it was found that both personalized service and customized service had a significantly positive effect on customer satisfaction. Second, it was found that customer satisfaction had a positive effect on purchase intention. Third, it was found that there was not a moderating effect on the relationship between personalized service, customized service and customer satisfaction in both groups of Generation Z and Millennial as a moderator variable. This paper presents implications for establishing a service strategy that considers consumer characteristics in providing subscription services in a practical way, and using them as basic data in the academics studying this field in the future.

In this study, it analyzed the characteristics of spool in pressure proportional control valve for using the target pressure at 2,000 bar and tried design and manufactured for prototype. Also, performance characteristics of valve due to input voltage are progressed. Using high torque servo motor of input voltage in 0 to 5 Volt, spool made linear displacement, spool with aspect change and sleeve can be change the flow due to spool position. The result of analysis obtained linear characteristics spool displacement, spool diameter per spool displacement, and the change of flow surface. The result of capacity to resist pressure analysis in valve body got that von mises stress in the body edge was 0.00988 mm and their lever was very slight. Above results of body design verified stable condition for using ultra high pressure environments.

Local currency is recognized as a local economy revitalization or local community. However, local money is made up of a means of realizing local communities. In particular, the paradigm of the village community is changing to resident-centered living autonomy and resident autonomy, which predicts a fundamental change in the way local currency is performed. Local government-led local economy activation is required to be reorganized and developed into a leading community in which the village community solves problems of the local economy together. However, in the era of resident autonomy, when village communities become commonplace and the types of communities become diversified, it is not desirable to inform citizens of local currency, which is a policy of activating the local economy, to use. Therefore, in this paper, we present a platform for suppliers, marketers, consumers, etc. that constitutes the community based on local currency management plans in terms of village communities. This proposed platform model provides an ICT-based integrated local currency service to integrate and operate local information resources of the government, local governments, and related companies so that regional economic communities can be formed based on the income generation of local residents. When the platform proposed in this paper is serviced, it has the following advantages. First, as a management strategy that simultaneously creates social values ​​in the process of creating economic values ​​among members of the community, shared values ​​are created with each other. Second, it is possible to interact economically and socially with the community by integrating fragmented information of community members. Third, the interaction between individuals and communities changes into common interests in terms of revitalizing the local economy.

This study is about a case of class in which the Children’s Literature Education was operated by applying problem-based learning. The PBL problem set in this class was ‘Development of a play-centered picture book reading activity resource book.’ And it consisted of the processes of ‘problem confirmation’, ‘scaffold setting’, ‘data collection’, ‘re-checking & planning to solve the problem’, ‘presentation and assessment of final problem solution’ so that the class can be a self-directed learning process to solve the PBL problem. Participants were 18 first grade students in the dept. of early childhood education at S University located in Gyeonggi-do, taking the Child Literature Education course established in the second semester of 2019. They performed tasks such as demonstrating reading picture books, collaborative learning to solve problems and presenting results, peer evaluation and self-assessment, and submission of final reports, while creating reflection journals on their daily learning experiences. Through the Children’s Literature Education class applying PBL, students experienced ‘difficulties of uncertainty’, but on the other hand, they were able to experience ‘the merits of classes starting from an empty background.’ In addition, students gave a positive meaning to their experiences with ‘class that made them familiar with their majors although it was difficult’, ‘pleasant experiences to make together’, and ‘the burden of many tasks, but none of them can be removed.’ In the discussion, it was suggested that students can cultivate creative competencies and teaching professional competencies as early childhood teachers through PBL class as the case of this study.

In recent years, the beauty industry has grown steadily due to an increase in living standards along with economic development, an increase in human desire for beauty, and K-beauty’s entry into overseas markets. However, despite such external growth, competition is intensifying due to rapid environmental changes, overheated competition, and overseas franchise entry into the domestic market. Now, the beauty industry has become a reality in which excessive competition cannot be avoided, and simple technology-oriented operation cannot survival. Therefore, this study analyzed the effect of internal marketing activities on job satisfaction and customer orientation. As a result of the analysis, since the beauty industry is structurally closely related to internal marketing, job satisfaction, and customer orientation, the beauty manager first establishes a differentiated strategy that takes into account the compensation system, delegation of authority, etc. It can be seen that it is desirable to do it. In addition, efforts to improve the quality of service by enhancing the job satisfaction of employees through efficient manpower management to realize customer satisfaction can be seen as the most important.

The purpose of this study was to explore the clusters of the preschool teacher’s emotional labor strategy and examine the relationship with inter-personal stress and self esteem. 437 preschool teachers participated in this study. K- means cluster analysis, and One-way ANOVA were performed for the statistical analyses. As a result, The findings were as follows: First, There were 4 clusters of the preschool teacher’s emotional labor strategies, which were ‘High emotional labor type’, ‘Harmonic emotional labor type’, ‘Suppressed emotional labor type’. Second, there were differences in inter-personal stress and self esteem according to the type of cluster. Preschool teachers in the ‘High emotional labor type’ showed a high level of inter-personal stress and low level of self-esteem. However, preschool teachers in the ‘Harmonic emotional labor type’ showed a low level of inter-personal stress and high level of self-esteem. Therefore, ‘Harmonic emotional labor type’ can be the most efficient emotional labor cluster type.

The non-face-to-face and online markets are growing as social distancing has been intensified due to the recent COVID-19 impact. In particular, sports industry markets are also showing products that can be exercised alone at home due to the development of the IT industry. In this study, in order to meet the rapidly increasing demand for home training, we developed an “AI yoga trainer device” that can help healthcare. Morninghol yoga pose estimation using an inexpensive $99 Movidius Neural Compute Stick 2 instead of an expensive GPU. By implementing the algorithm, an experiment was conducted to recognize six poses of the sun worship posture, which is a basic yoga posture. As a result of the experimental analysis, the accuracy of the algorithm was 92.4%, which was measured to be a level that can be introduced in real life, and it was confirmed that the speed of deep learning calculation of visible and specific numerical values ​​using the Movidius Neural Compute Stick 2 was improved. Through this, we confirmed the feasibility of implementing IoT technology and deep learning-based home training technology.