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Currently, Korea's population is aging rapidly, and there is a lot of interest in the area of life in old age. Especially, as you get older, your ability to exercise gradually decreases, and you need to exercise continuously for your health. As a result, Korea older people exercise more than welfare powerhouse Japan. However, recently studies show that physical function lags even further. The results are based on a lack of diversity in motion. In Korea, people enjoy walking, hiking, and riding bicycles, but in Japan, there is a difference in the quality of exercise such as muscle-building exercise class, ball exercise, and underwater exercise. The old Korean ways of exercising are all high-intensity sports, but some do not know whether the purpose is for social club purposes. In this paper, real-time joint tracking using a single camera and deep learning was carried out to study the development direction of content that can measure or improve exercise ability to improve actual muscle strength. [ABSTRACT FROM AUTHOR]

Lightning to an overhead transmission line system can cause a breakdown between arcing horns of the lower line and a jumper wire of the upper line due to the rising of hot gases generated by arc jets between arcing horns. This article describes the experiments and the calculations regarding the rising of the hot gases for the case of 66 kV overhead transmission lines. The calculations were carried out considering the length of the arc jet, the electromagnetic force acting between the arc jet and the arc column, the force due to the arc jet spouting from the arcing horn, and the buoyant force of the hot gases for various arc currents and two types of arcing horn. As a result, it was found that the calculation results showed a tendency similar to the experimental ones. Furthermore, the breakdown phenomena between the arcing horns and the jumper wire were also investigated using the calculation results. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc. [ABSTRACT FROM AUTHOR]