• 해운
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• no.8 s.19
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• pp.18-25
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• 2005

• Journal of the Institute of Convergence Signal Processing
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• v.21 no.2
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• pp.61-66
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• 2020

Recently, a variety of electric anesthetics devices have been developed and used in clinical practice to reduce the fatigue of the operator during local anesthesia for dental procedures and to compensate for the disadvantages of manual anesthesia device. In this electric anesthesia injection device, the accurate and constant delivery of pressure for drug infusion is a very important performance factor. In order to evaluate the accuracy of the transfer pressure, a small pressure gauge using a load cell is often used, but since the elastic body inside the load cell may not be able to accommodate a sufficient displacement, an error may occur when evaluating pressure performance. For these reasons, in this study, we proposed and evaluated a silicon-chrome steel (Si-Cr steel) spring jig that can accommodate relatively large displacements that can be used when evaluating the performance of a pressure-controlled pressure application device using a load cell type pressure gauge. As a result of the pressure transmissibility test and repeated measurement results using a commercial dental anesthesia injection device, a more stable result was obtained when using a spring jig, and it was confirmed that the frequency of abnormally high measurement was reduced.

• Journal of Mushroom
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• v.18 no.4
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• pp.292-296
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• 2020

This study surveyed mushrooms as part of the Hallasan Natural Reserve Basic Academic Survey, which was conducted for the purposes of securing basic data on the Hallasan Mountain Natural Reserve; our study targeted the area between Seongpanak Trail and Donnaeko Trail from April to October 2018. A total of 392 species from 184 genera in 65 families were investigated. Among them, 187 mushrooms were wood-decaying species. The greatest diversity in mushroom species was recorded in July (206 species) at an altitude of 600-800 m above sea level. Among the mushrooms investigated, five were climate-sensitive biological indicator species and two were potential candidates for that classification. Of these, 163 species were biological resources that require approval for overseas export.

• Journal of Korea Entertainment Industry Association
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• v.15 no.3
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• pp.297-309
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• 2021

Many game companies are releasing various games based on mobile platforms, and they are using various marketing strategies such as using celebrities to expand their influence on the initial market. This increases the related cost, which makes the continued development of small and medium-sized game companies more difficult. Therefore, this study attempts to understand consumer values according to the type of mobile game marketing and to explore the factors that affect the switching intention of mobile games based on real users of mobile games. As a result of this study, it was found that the playfulness and economics of mobile game marketing have positive effect on the attitudes towards mobile game advertisements and attitudes towards mobile games, but the attractiveness of mobile game marketing using celebrities does not. It was found that attitudes towards mobile game advertisements and attitudes towards mobile games have an influence on the switching intention of mobile games. Through this, we intend to provide useful implications for small and medium game companies to seek effective marketing plans.