• The Journal of the Convergence on Culture Technology
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• v.8 no.6
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• pp.41-48
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• 2022

The purpose of this study is to compare the meaning of the experience of robot play in the free play time of 5-year-old children in daycare centers with the experience of 5-year-old children in the structural group activities of teachers. To this end, a total of 32 children (15 in the experimental group and 17 in the comparative group) aged 5 were conducted for 1 hour three times a week for 10 weeks. Robots were supported as toys in the classroom of the experimental group, and children in the comparative group freely experienced robot exploration and play during free play time, and children in the comparative group learned the robot's functions and performed structural group activities based on the 2019 Revised Nuri Curriculum national-level curriculum. As a result of analyzing the difference between pre-test and post-test, the use of robots in free play showed a significant effect in creativity and fluency of children, and a significant effect in expression of pleasure in playability. These results suggest that robots are meaningful as play materials in early childhood education, which aims for infant-led free play, and that it is worth studying the robot experiences of children in these free situations in the future.

• Journal of Digital Convergence
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• v.13 no.8
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• pp.431-438
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• 2015

Smartphone is popularized, it is a lot of development of the mobile advertising industry, is born many types of mobile advertising. Many developers in the mobile game is the advertised profitable by using the SDK of service companies that service the advertising the launch of free games. Mobile IGA banner, front advertising, we use the ad in the three forms of the front video advertising, each of advertising, have advantages and disadvantages. Although many of the games currently use a full-page ad and front video ads, these ads profitable model is use the user game play time. In order to improve the disadvantage of this method, Commonly used to analyze the three ad revenue model, looking for the element, by using the research result of the previous studies, we have proposed a new advertising Convergence profitable models.

• Journal of the Korea Convergence Society
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• v.11 no.8
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• pp.159-163
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• 2020

In this study, the flow analyses around according to the existence or non- existence of the trailer's deflector and the shapes were carried out. In the absence of a deflector, the kinetic energy of the turbulence behind the container also generates higher kinetic energy in a wider area than in the presence of a deflector, which adversely affects the vehicle's driving performance. As a trailer's wind deflector-free model has unstable flow rates around the trailer and high kinetic energy of turbulence than a model with a deflector, it can be thought that the increase of fuel economy can be expected by installing a deflector in the trailer. By applying the study result on flow analysis near trailer due to shape of wind deflector, this study is seen to be suitable for the aesthetic convergence.

• Journal of the Korea Convergence Society
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• v.6 no.6
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• pp.247-253
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• 2015

The purpose of this convergence study was to analysis the current status of the cancer screening and background healthcare systems in Korea and Japan. First, Cancer Screening Program is coordinated well with National Health Insurance Service(NHIS) under a unified insurer system in Korea. But in Japan, there are over 3,500 insurer and coordinating a comprehensive strategy for cancer screening promotion has been very difficult. Second, Rate of cancer screening is influenced by public healthcare system. In Korea public healthcare does not cover a wide rage of services. Almost free cancer screening provides high incentive to participation. It is very important to understand the impacts of each healthcare system when designing an efficient cancer screening system.

• Journal of the Korea Convergence Society
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• v.7 no.5
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• pp.89-96
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• 2016

This study comprised descriptive research the life stress and user satisfaction of female students who use University health clinic. From October 29 to November 11 2014, the 203 data were analyzed using t-test, ANOVA and Scheffe with SPSS 21.0. The highest score were in 'study', the lowest were in 'friend'. There were significant different in 'Future' and 'study' by major departments, 'friend' different by grade. 'Lover' was higher in drinking group, in total and 'value' were higher by meal habit, in 'friend' was higher in group binge. The motivations of use were high in medical treatment and InBody. Most satisfaction item were free administration and emergency medical treatment. Thus it is necessary to different design to reduce life stress in female university students and to operate effectively in university health clinic.

• Journal of Electrochemical Science and Technology
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• v.6 no.4
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• pp.121-130
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• 2015

The micro emulsion method has been successfully used for preparing perovskite LaCoO₃ with uniform, fine-shaped nanoparticles showing high activity as electro catalysts in oxygen reduction reactions (ORRs). They are, therefore, promising candidates for the air-cathode in metal-air rechargeable batteries. Since the activity of a catalyst is highly dependent on its specific surface area, nanoparticles of the perovskite catalyst are desirable for catalyzing both oxygen reduction and evolution reactions. Herein, LaCoO₃ powder was also prepared by sol-gel method for comparison, with a broad particle distribution and high agglomeration. The electro catalytic properties of LaCoO₃ and LaCoO₃-carbon Super P mixture layers toward the ORR were studied comparatively using the rotating disk electrode technique in 0.1 M KOH electrolyte to elucidate the effect of carbon Super P. Koutecky-Levich theory was applied to acquire the overall electron transfer number (n) during the ORR, calculated to be ~3.74 for the LaCoO₃-Super P mixture, quite close to the theoretical value (4.0), and ~2.7 for carbon-free LaCoO₃. A synergistic effect toward the ORR is observed when carbon is present in the LaCoO₃ layer. Carbon is assumed to be more than an additive, enhancing the electronic conductivity of the oxide catalyst. It is suggested that ORRs, catalyzed by the LaCoO₃-Super P mixture, are dominated by a 2+2-electron transfer pathway to form the final, hydroxyl ion product.

• Convergence Security Journal
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• v.14 no.7
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• pp.29-36
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• 2014

In this study, we design and develop a VLC test-bed system which has been recently issued and focused as good convergence technology in the world. We classify the developed system into transmission part including analog LED driver module, digital signal modulation module, and receiver part with light sensing module and signal demodulation module. Then we introduce important characteristics and components. We analyze some factors for each module. To validate the communication of the designed VLC system, we develop a VLC sender-receiver simulator which can control the dimming factor and flicker-free effect. From the developed system, we observed about 12Mbps of data transmission rate with 0.5m~1m of distance, without packet loss. We verified the real-time communication with multimedia streaming which can be considered as very high date rate. The developed system and technology will be useful for some converged data services like indoor positing, home appliances, and indoor parking system.

• Journal of Digital Convergence
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• v.13 no.2
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• pp.401-406
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• 2015

The aim of present study is to investigate antioxidative effect of the Rice Bran Extracts and Defatted Rice Bran Extracts. Rice Bran Extracts used Rice Bran Water Extract, Rice Bran Ethanol Extract, Defatted Rice Bran Water Extract, Defatted Rice Bran Ethanol Extract. This study was carried out to examine quenching effects of Rice bran extracts on DPPH-, Riboflavin-, and Xanthin oxidase- originated superoxide activities. In addition, in order to determine whether Rice Bran Extract can be safely applied to human skin, the cytotoxic effects of Rice Bran Extract in Human Dermal Fibroblast cells were determined using MTS Assay. These results demonstrated that RBE and DRBE had anti-oxidative properties and did not induce the cytotoxic effects in Human Dermal Fibroblast cells. Therefore, these findings suggest that anti-oxidative properties of RBE and DRBE may be considered convergence with skin care.

• Journal of Digital Convergence
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• v.14 no.1
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• pp.407-412
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• 2016

The design in this study containing a consideration of children's free fantasy and experiential acquisition, is convergence in terms of its external use of Solar thermal energy and human friendly software, and is about public design based on eco-friendly playing equipments. Despite several flaws, the modularized solar-light power generation equipment is suitable for realizing the concept of the relationship between the Sun and the life thanks to its being versatile. Playing is equivalent to the world for children in itself, therefore; it should be something flexible to stimulate their fantasy and I imagined the sun, which should be something more than a mere source of power generation, and the children interact with each other by the medium of this equipment.

• Journal of Digital Convergence
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• v.18 no.8
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• pp.459-467
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• 2020

From the perspective of the artist who produces modern ornaments, I wanted to see the future of modern ornaments in the hyperconnected era. I would like to find a practical way of converging information communication technology, which is one of them, and applying nfc tag among them. For the practical approach, after looking at the actual examples of commercial ring products using nfc tag technology, I tried to find a practical method that can be applied to modern ornaments produced in the workshop. As a result, two realistic alternatives were drawn: the investment method, which is free to converge, but has limited technical utilization, and an assembly method that requires high convergence from the design planning stage. After then, to know investment methods, have been produced that may have problems with real applications. I made a real sample, not a concept, to explain the technical factors and precautions necessary for applying nfc technology.