• Journal of Korean Electronics
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• v.3 no.12
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• pp.19-30
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• 1983

• Proceedings of the Korean Institute of Communication Sciences Conference
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• 2004.11a
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• pp.313-313
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• 2004

• Proceedings of the KIPE Conference
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• 2014.07a
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• pp.309-310
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• 2014

분산형 전원 시스템과 마이크로그리드에 대한 관심이 증가함에 따라 다수의 병렬 컨버터의 제어가 중요한 이슈가 되었다. 가장 보편화된 분산 전원의 제어 방법 중 하나는 드룹 방식을 이용한 분산형 제어이다. 다중 전원이 연결된 버스의 전압 품질을 향상시키기 위해 본 논문에서는 드룹 제어에 의한 전압 변동을 해결하기 위한 방법이 제안되었다. 제안된 개체 기반의 전압 회복 기술은 모듈 간 통신을 최소화하는 한편 자율적 운용 특성을 유지한다. 시뮬레이션 및 실험 결과를 통해 제안한 방법을 검증하였다.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.5 no.4
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• pp.216-223
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• 2012

When the implants are inserted, the recovery period of bone matrix is around 8 to 12 weeks. The osseointegration plays an important role in recovery period of bone matrix around the implants. In this study, we surveys how mechanical stimuli, ultrasonic stimuli, laser stimuli, LED stimuli affects the osseointegration. We found that $1.47^{\sim}1.6MHz$ stimuli are ideal for all stimuli.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2022.10a
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• pp.542-544
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• 2022

In this study, a basic study was conducted to confirm the wound recovering ability using LEDs. After cultured fibroblast on 6-wells we formed a wound. Here, LEDs of a specific wavelength are irradiated and check the wound healing through Matlab image processing. As a result, it was confirmed that fibroblast recovered faster when LED was irradiated.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.9 no.4
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• pp.373-387
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• 2016

The citizen is going to live on security for better life stably in all times, and, as for such human basic desire, it is to the base which is important about the durability and the development of the smart city. I defined needs and the priority about the disaster recovery of the community as a citizen through date analysis until I came back to the normal environment again after a smart city suffered the damage by the misfortune in the study. I was going to suggest a method to support inhabitants of the damage area that was the immediate, and was necessary for a base in such date analysis and recovery of the community. I considered the Great East Japan Earthquake in an example in 2011. I studied the smart city plan which could improve the resilience of the local citizen and community through data utilization.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.5
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• pp.1231-1239
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• 2010

The aim of this study was developing the non-invasive focused magnetic stimulation system(NI_FMSS) that can stimulates acupoints which are small parts and knotted muscular tissues. To evaluate pain treatment effect of the NI_FMSS, we caused muscle fatigue to 25 subjects in biceps of the arm. Then, we stimulated acupoints(trigger points) HT2 using low frequency stimulator(10 subjects) and NI_FMSS(10 subjects). The other 5 subjects had not been stimulated. We analyzed muscle fatigue recovery with median frequency, RMS and median power in frequency domain for 5 days. We checked the magnetic stimulation effect on acupoint by evaluation of muscle fatigue recovery. Therefore, we identified that the NI_FMSS was more efficient system to relieve muscle pain than electric-stimulation system.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.26 no.3
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• pp.463-468
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• 2022

COVID-19 is a complex disaster, not an infectious disease-level disaster, and it is difficult to respond with the existing disaster response management method. As a result, experiencing psychological stress and trauma such as 'Corona Blue' has emerged as a new social problem. This study examined the changes in non-face-to-face counseling services using ICT technology and the application cases of image, AI, and VR by companies as the transition to the digital economy accelerates. Based on this, disaster psychological recovery support services were considered to improve the psychological recovery and quality of life of the people after a disaster by establishing a more efficient counseling system and developing counseling services using ICT technology.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.295-297
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• 2021

In this study, the difference in resilience was analyzed based on the results of the microprocessor class for the group who temporarily conducted online learning due to COVID-19 and made a cross-school course. As a result of the study, the resilience value in online learning was found to be less than 150 in 12, 150 to less than 180 in 33, and 180 or more in 10. On the other hand, the resilience value in offline learning was found to be less than 150, 8 people, 150 or more, 180, 30, 180 or more, 17. Therefore, in subjects that teach hardware and software at the same time, such as a microprocessor, it is necessary to proceed with offline learning that can establish a laboratory learning environment, and when proceeding with online learning unavoidably due to COVID-19, the theory is the same as other theoretical subjects. Content should be focused on.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.10a
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• pp.508-510
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• 2021

In this study, the difference in resilience was analyzed based on the results of a study of classes that practiced using Raspberry Pi, which had to cross school due to temporarily conducting online classes due to the COVID-19 pandemic. As a result of the study, in online classes, 14 people had resilience less than 150, 32 people who had 150 or more and less than 180, and 9 people who had 180 or more. On the other hand, in the school attendance class, there were 7 people with resilience less than 150, 29 people with resilience less than 150 and less than 180, and 20 people with more than 180. Therefore, in subjects where programming using Raspberry Pi and circuit manufacturing are taught at the same time, the laboratory and practice environment should be able to proceed properly as much as possible. should proceed mainly.