• Journal of Aerospace System Engineering
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• v.14 no.6
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• pp.44-57
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• 2020

The ICAO AMO global recognition system will be instituted in 2024, with the aim of reducing the certification and surveillance burden on aviation authorities and approved maintenance organizations (AMOs). If the domestic AMO certification and surveillance system is internationally recognized through this system, it may facilitate the rapid development of the domestic MRO industry in South Korea. To ensure international recognition of the domestic AMO system, the AMO surveillance and regulation system must be improved. This study reviewed ICAO policies, standards, guidelines, and leading aviation authorities' regulations and systems with regard to maintenance organization certification and surveillance, and a comparative analysis with the domestic system was conducted. From this, gaps in aviation safety inspection personnel training, qualification, and surveillance were identified, and measures for improving inspection personnel training and organization certification and surveillance system maintenance were elucidated to preemptively respond to the ICAO AMO global recognition system.

• Journal of Yeungnam Medical Science
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• v.13 no.1
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• pp.97-109
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• 1996

Recently there has been attempts to develop hospital information system including order communicating system, patient tracing system, tumor registry system, office automation system and picture archiving and communication system(PACS). The authors devloped a practical system that was operated via order communication system of Yeungnam University Hospital. The system provided us the speed, accuracy, reliability, retention, economy and wide applicability through practical test. So we believed that this system would be one of standard computerized programs in radiation oncology practice and providing widely usable data for clinical statistics, medical record, tumor registry system and clinical researches.

• 한국태양에너지학회:학술대회논문집
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• 2008.11a
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• pp.53-56
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• 2008

A photovoltaic panel is a device that, through the photovoltaic effect, converts luminous energy into electric energy. Photovoltaic generation system used infinity of solar energy, cost of fuel is needless and there in no air pollution or waste occurrence. This paper summarizes the results of these efforts by offering a photovoltaic system structure in 30[kW] large scale applications installed in Mokpo National University dormitory roof. The status of photovoltaic system components, are inter-connection and safety equipment monitoring system will be summarized as this article. This describes configuration of utility interactive photovoltaic system which generated power supply for dormitory. In this paper represent 30[kW] utility photovoltaic system examination result.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.27 no.4
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• pp.117-124
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• 2004

Since ISO 9001 quality system was established in 1987, many companies have adopted it for assuring the quality of their processes. Not only manufacturing companies but service industries such as hospitals, armies, educational institutes, banks are now implementing ISO 9001 quality management system. In this study, we proposed the definitions of customers, manufacturing processes, products, and quality characteristics of the ISO 9001:2000(E) quality management system in university. An implementation procedure of ISO 9001:2000(E) quality management system in university was also suggested. Furthermore, we dealt with the case study of 'C' College's ISO 9001:2000(E) quality management system and showed some of its effects.

• The Journal of Korea Robotics Society
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• v.16 no.2
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• pp.155-163
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• 2021

In this paper, we propose a four 2-link robotic leg landing system that is used for leveling the bottom of the landing system, even when the quadcopter posture is changed. The case of conventional skid type landing gear has a risk when the quadcopter lands on a moving vehicle because the skid type landing gear is tilted to the landing site at this situation. To solve this problem, it is necessary to level the bottom of the landing system when the quadcopter posture is changed in the flight. Therefore, the proposed landing system used a four 2-link robotic leg with leveling method. The leveling method was derived from the method of determining a plane. The superiority of the proposed system was verified with 6-axis stewart platform and real flight experiment, and it shows feasibility of leveling method and proposed landing system.

• Journal of Power Electronics
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• v.19 no.1
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• pp.316-331
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• 2019

A practical application of a supercapacitor energy storage system in a polarization instrument is proposed on the basis of the energy storage requirements of an induced polarization (IP) transmitter for geophysical exploration. We focused on the energy storage system of a supercapacitor, the topology of the power converter, and the system control strategy as key technologies, and we performed theoretical research and experimental tests on the system and developed an experimental platform. The experiments validated the theoretical research on the key technologies of the supercapacitor energy storage system and demonstrated the effectiveness of the innovation. Results showed that the storage system is efficient and satisfies the energy storage needs of the IP transmitter.

• Journal of Integrative Natural Science
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• v.12 no.3
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• pp.74-77
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• 2019

The purpose of this study is to explore the effects of Chamaecyparis obtusa essential oil on the activity of autonomic nervous system. Heart rate variability (HRV), as an indicator of autonomic nervous system activity and blood pressure were measured before and after inhalation of Chamaecyparis obtusa essential oil. The systolic blood pressure was decreased by inhalation of Chamaecyparis obtusa essential oil (p<0.05). The diastolic blood pressure was not changed significantly by Chamaecyparis obtusa. High frequency (HF) power level was not changed but High frequency/Low frequency (HF/LF) ratio was decreased by Chamaecyparis obtusa essential oil (p<0.05), meaning that parasympathetic nervous system activity was not affected but sympathetic nervous system activity was decreased. These results indicate that Chamaecyparis obtusa essential oil has a modulatory effect on the autonomic nervous system activity.

• International journal of advanced smart convergence
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• v.2 no.2
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• pp.10-15
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• 2013

An expert network administrator is not always stationed as disasters happen. In that case, it is desirable that a novice administrator is capable of taking part in network recovery operations as well. In this paper, an agent-based network management system in emergency situations is presented. We use the Active Information Resource based Network Management System (AIR-NMS) to relieve the human administrator from parts of her management tasks and present an interface that remotely can control this management system. The effectiveness of the system is demonstrated by experiments using a prototype system.

• Proceedings of the KIEE Conference
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• 2004.04a
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• pp.201-204
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• 2004

Consider the optimal design for PV system, it is apply to 3kW interconnected electric power PV system, that is a point of reference for 3kW PV the spread residential section system. Through the driving various practical system, we look into that for efficiency of generation and stability of interconnected system. Using obtained data acquisition, It can be suggest that installation and management for system parameter to optimal design maximum generation electric power. PV system have some losses that are variation radiation, shadow, change temperature, unbalanced grid connection, serial circuit loss, MPP deference loss, PCS loss and so forth. Using obtained various performance characteristic result, we can make database in the future, through the this study, we can get the reliance and have regard to spread PV system.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.11a
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• pp.167-170
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• 2002

본 고의 Multi-Media Caching System 은 이동 단말기의 보급 & 발달로 예상되는 Trans-coder 부하의 증가와 응답 시간 개선 하기 위한 것으로 기존의 Web 문서의 Caching System 과 비교 분석 하고, 빈번한 이동 단말기의 요구에 의해서 발생하는 않은 trans-coder 작업을 최소화 할 수 있는 XML 기반의 Caching System을 연구 하고자 한다. 즉, 기존의 Web Caching System의 장점과 XML의 재 사용 성, 확장 성, 플랫폼 독립성, 다양한 종류의 응용 프로그램과의 접목성 등의 장점을 살리고, Cache System Manager에 의해 최소환의 Trans-coder 동작이 일어나도록 한다. 따라서 Trans-coder 된 작업을 Caching System 에 보관 관리 하는 최적의 Caching System Manager 방법을 제안하고자 한다.