• Journal of Acupuncture Research
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• v.25 no.6
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• pp.135-143
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• 2008

Objectives : The main purpose of this research is to make a survey of the effective way of the Oriental medical care and to enlarge the range of Oriental medical treatment about traffic accidental patients. Methods : In following research, we surveyed 120 patients of traffic accident who were hospitalized in Dong-Shin Oriental Medical Hospital from October, 1, 2007 to August, 20, 2008 according to medical chart. Results : 1. In distribution of gender and age, the rate of male was 35.8%, that of female was 64.2% and the majority of the patients were twenties and thirties. 2. In the traffic accident patterns, the most was car crash from behind(61.7%) and after traffic accident, 75 patients(62.5%) visited our hospital for oriental medical treatment in less than 5days. 3. 46 patients(38.3%) choose the oriental medical treatment for the primary care and after medical care, 36 patients(31.7%) visited our hospital due to dissatisfaction of current treatment and maintained pain. 4. Partial pain was the chief complaint and the most of painful parts was neck(76.7%), followed by low back(69.2%). 5. Though radiation test, the most was cervical spine sprain(76.7%), followed by straightening of lumbar spine(66.7%). 6. In the periods of admission, less than 7 days was the most(53.3%), followed by less than 14 days(35.9%). 7. The treatment was effective to 93 patient out of 106 who had been hospitalized for less than 14 days. Conclusions : This data suggested that the Oriental medical care could be more effective treatment about traffic accidental patients without surgical injury.

• Journal of the Korea Concrete Institute
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• v.28 no.6
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• pp.685-693
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• 2016

The outer tank of a liquefied natural gas (LNG) storage tank is a longitudinally and meridionally pre-stressed concrete (PSC) wall structure. Because of the current trend of constructing larger LNG storage tanks, the pre-stressing forces required to increase wall strength must be significantly increased. Because of the increase in tank sizes and pre-stressing forces, an extreme loading scenario such as a bomb blast or an airplane crash needs to be investigated. Therefore, in this study, the blast resistance performance of LNG storage tanks was analyzed by conducting a blast simulation to investigate the safety of larger LNG storage tanks. Test data validation for a blast simulation of reinforced concrete panels was performed using a specific FEM code, LS-DYNA, prior to a full-scale blast simulation of the outer tank of a 270,000-kL LNG storage tank. Another objective of this study was to evaluate the safety and serviceability of an LNG storage tank with respect to varying amounts of explosive charge. The results of this study can be used as basic data for the design and safety evaluation of PSC LNG storage tanks.

• KEPCO Journal on Electric Power and Energy
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• v.4 no.2
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• pp.115-123
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• 2018

Various types of robots running on power transmission lines have been developed for the purpose of line patrol monitoring. They usually have complex mechanism to run and avoid obstacles on the power line, but nevertheless did not show satisfactory performance for going over the obstacles. Moreover, they were so heavy that they could not be easily installed on the lines. To compensate these problems, flying robots have been developed and recently, multi-copter drones with flight stability have been used in the electric power industry. The drones could be remotely controlled by human operators to monitor power distribution lines. In the case of transmission line patrol, however, transmission towers are huge and their spans are very long, and thus, it is very difficult for the pilot to control the patrol drones with the naked eye from a long distance away. This means that the risk of a drone crash onto electric power facilities always resides. In addition, there exists another danger of electromagnetic interference with the drones on autopilot waypoint tracking under ultra-high voltage environments. This paper presents a patrol monitoring plan of autopilot drones for power transmission lines and its field tests. First, the magnetic field effect on an autopilot patrol drone is investigated. Then, how to build the flight path to avoid the magnetic interference is proposed and our autopilot drone system is introduced. Finally, the effectiveness of the proposed patrol plan is confirmed through its field test results in the 154 kV, 345 kV and 765 kV transmission lines in Chungcheongnam-do.