• Journal of the Korean Society for Library and Information Science
• /
• v.47 no.1
• /
• pp.81-104
• /
• 2013

The U-library service is a user-oriented library service through which users, after browsing and making reservations using the Internet and smartphones, can borrow and return library materials at an unmanned circulation system located in places, such as subway stations, without visiting the library. However, the U-library service is still in the early stages both quantitatively and qualitatively. In that, this study, in order to enhance our understanding of the U-library service, conceptualizes the unmanned circulation system, investigates current situation by examining and analyzing some U-library service cases, and pinpoints some problems while making some suggestions for improvement.

• Journal of Advanced Marine Engineering and Technology
• /
• v.35 no.3
• /
• pp.329-334
• /
• 2011

The cooling water circulation plates had been used to drop the temperature of refractory outside shell of common cooling system by using cooling plate or stave type. When they are attacked by surrounding gas, they are corroded and the water flows in the refractory due to leakage of water. So, the life of refractory material is shortened and changed due to the worse conditions of cooling system. The automatic sensing device for water leakage of cooling plate is developed to check the position of trouble by using the microprocessor system when cooling water leak and gas are flowed into the cooling plate through the leakage position. The flowed gas is detected in the micro-process system which delivers the detected position of cooling plate or stave to main control room through the wireless-radio relay station. This system can be possible to detect the position of cooling plate or stave against the water leakage part immediately and then deliver the signal to main control room by using the microprocessor system and wireless-radio relay station. This system will be developed in changing the working condition from manual system to unmanned auto alarm system.

• The Journal of the Korea institute of electronic communication sciences
• /
• v.19 no.1
• /
• pp.209-216
• /
• 2024

Land shrimp farms can control the growth environment more stably than coastal ones, making them advantageous for high-quality, large-scale production. In order to maintain an optimal shrimp growth environment, various factors such as water circulation, maintaining appropriate water temperature, oxygen supply, and feed supply must be managed. In particular, failure to properly manage water quality can lead to the death of shrimp, making it difficult to have people stationed at the farm 24 hours a day to continuously manage them. In this paper, to solve this problem, we design an integrated monitoring system for land farms that can be operated with minimal manpower. The proposed design plan uses IoT technology to collect real-time images of land farms, pump status, water quality data, and energy usage and transmit them to the server. Through web interfaces and smartphone apps, administrators can check the status of the farm stored on the server anytime, anywhere in real time and take necessary measures. Therefore, it is possible to significantly reduce field work hours without the need for managers to reside in the farm.

• 전자공학회논문지 IE
• /
• v.46 no.4
• /
• pp.25-30
• /
• 2009

The cooling water circulation pipes had been used to drop the temperature of refractory outside shell of blast furnace by cooling plate or stave type. They were attacked by surrounding CO gas and it was the cause that they were corroded and the water inflow in the refractory due to leakage of water. So, the life of refractory material was shorten and changed for the worse the conditions of blast furnace. The automatic sensing device for water leakage of cooling pipe was developed to check the position of trouble by use the micro-process system when cooling water leak and then CO gas will be inflowed into the cooling pipe at the leakage position. The inflowed CO gas will be detected in the micro-process system and delivered the detected position of cooling plate or stave to main control room through the wireless-radio relay station. This system can be possible to detect the position of cooling plate or stave the water leakage part immediately and then deliver the signal to main control room by use the micro-process system and wireless-radio relay station. This system will develop the working condition from manual system to unmanned auto alarm system.

• Journal of the Korean BIBLIA Society for library and Information Science
• /
• v.31 no.4
• /
• pp.121-144
• /
• 2020

The purpose of this study is to suggest the site selection of U-library in Daejeon. For this study, through literature research and analysis of the current status of U-library in Korea, evaluation indicators for the site selection are derived, and based on this, the location of the public library, the radius of the proposed location, the transport performance by subway station, government offices, transportation facilities, convenience facilities, the current status of major facilities and the number of residents by region were analyzed and applied. Finally, based on the analysis results, a total of 16 U-library locations were proposed in the five autonomous districts in Daejeon: 2 in Daedeok-gu, 2 in Dong-gu, 4 in Seo-gu, 6 in Yuseong-gu, and 2 in Jung-gu.