Despite various economic crisis situations around the world, the courier and delivery service
market continues to be revitalized. The parcel shipping volume in Korea is currently 3.37 …

We conducted experiments to improve the electrical properties of the CNW (carbon nanowall),
which has lower electrical properties than other carbon allotropes such as graphene and …

This paper is on the suggestion of maintenance items for electric railway facility systems.
With the recent increase in the use of electric locomotives, the utilization and importance of …

Recently, as air pollution and particulate matter worsen, the importance of a platform that can
monitor the air environment is emerging. Especially, among air pollutants, nitrogen dioxide (…

In recent years, if we order food by easily accessing the online market with our smartphone,
we can receive the product in a fresh state at dawn the next day. Cold chain is an industry …

With the growth of the online market, demand for logistics and courier cargo is increasing
rapidly. Accordingly, in the case of urban areas, road congestion and environmental problems …

This paper presents to verify the selective grounding fault protective relaying technique for
the ungrounded DC traction power supply system. This system selectively blocks fault section …

Recently, securing stable supply of fresh food is deemed as one of the important tasks.
Accordingly, now the presence of cold chain along with the needs of a comfortable and healthy …

Railway facilities need for long-term operation as the initial acquisition cost required to build
infrastructure is high. This paper is on the suggestion of maintenance items for electric …

The railroad facilities are intended for long-term operation as the initial acquisition costs
necessary for infrastructure construction are high. Therefore, regular maintenance of railroad …