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Intelligent Power Equipment Management Based on Distributed Context-Aware Inference in Smart Cities
Choi, Chang,Esposito, Christian,Wang, Haoxiang,Liu, Zhe,Choi, Junho IEEE 2018 IEEE communications magazine Vol.56 No.7
<P>Smart cities are systematically promoting the transition to sustainable and effective energy systems by promoting policies for energy efficiency, regionalized/distributed renewable energy generation, and intelligent energy management. In particular, this transition toward a more integrated and intelligent energy supply has created a plethora of energy meta-information made available through the IoT smart grid, thereby allowing big data analytical services to forecast energy consumption and to manage usage patterns. In this article, we propose a context-aware framework for intelligent power equipment management. Our contribution is to present a design of the proposed framework based on context awareness, the definition of a context ontology for power equipment management, a specification of the inference rules for the context ontology, and a context-aware inference service for power equipment management. The proposed system has broad applications to handle system monitoring and express system controls, so as to be easily and effectively applied to various application domains.</P>
Junho Choi,Chongsoo Cheung,Dongkwan Lee J-INSTITUTE 2021 International Journal of Human & Disaster Vol.6 No.4
Purpose: Framework act on the management of disasters and safety is the highest law covering disasters and safety in South Korea. Disaster management infrastructure has been expanded through the enactment and revision of the Framework act on the management of disasters and safety. However, there is still a high awareness that disaster management should be led by the administration. In the modern society, where self-help is emphasized above all else in the event of a disaster, it is difficult to expect effective disaster response through administrative initiative alone. This study intends to review measures to improve Framework act on the management of disasters and safety through evacuation that enables the primary victims, the residents, to respond to disasters most effectively. Method: The items such as enhancement of disaster site response capacity and emphasis on the role of local governments in disaster and safety management , which were newly revised in 2015, were reviewed. The problems of the current Disaster Safety Act were reviewed from three perspectives: Incomplete disaster prevention administration in case of a disaster , Various aspects of local residents for evacuation , and Insufficient structure of public-private cooperative system for evacuation . Results: First, it is necessary to recognize the incompleteness of disaster prevention administration during a disaster. Rather than increasing dependence on the administration, improvement should be made with the direction of how the residents can increase their independence and self-reliance. Second, the evacuation order should be improved to be ‘situational information’ that informs residents that they are in a situation that makes them think of evacuation, rather than ‘action directive type’. Third, the Framework act on the management of disasters and safety should stipulate in detail the establishment and reinforcement of public-private cooperation networks that utilize the capabilities of residents. Conclusion: For effective evacuation in the event of a large-scale disaster, the response capacity between various actors in the local community must be quickly aggregated. In addition, through improvement of the Disaster Safety Act in the future, the evacuation plan should start with reestablishing the relationship between the administration and residents. Residents should be aware of their own role for evacuation, and the administration should have a system that can support it as much as possible.
Junho Choi,Chongsoo Cheung,Dongkwan Lee J-INSTITUTE 2021 International Journal of Human & Disaster Vol.6 No.2
Purpose: In the event of a disaster, the work of local governments should continue not only to respond to disasters but also to normal work. Therefore, what should be prioritized during normal administrative work, the scale of manpower and resources, priority work in the event of a disaster, and how to effectively use manpower and facilities are important planning elements to be conceived by local governments. This study examines strategies for local governments to continue administrative work in the event of a disaster in a large city. Method: The Administrative Business Continuity Plan(BCP) considers what the administration should do and what to do with the premise of administrative damage and restrictions due to disasters such as manpower and facilities. It is necessary to review the actual activities and conditions for all employees taking into account the information, facilities, facilities, and related organizations necessary to perform a given task in the event of a disaster. This study presented the perspective of BCP as administrative damage, core tasks according to priorities, and specificity of task performance. In addition, it analyzes the administrative BCP in case of an earthquake, taking the case of Tokyo and Osaka, the major cities of Japan. Results: To summarize the characteristics of the administrative BCPs of Tokyo and Osaka Prefecture, they considered what they should do and what they can do while preparing a countermeasure for the upcoming disaster. It is also significant that it was not only aimed at putting such concerns into a plan but also considered a plan that can be put into practice in everyday life. It was made clear that disaster response was not the responsibility of some ministries by collectively sharing the work to be done by departments in the government office Conclusion: First, it is necessary to devise a plan that does not disrupt business performance in consideration of administrative damage. Second, after selecting the core tasks according to the priorities, it is necessary to consider a plan that can be practiced in normal times by cultivating disaster prevention awareness through training or training. Third, agreements should be made in advance not only with all departments in the government building, but also with other local governments in some cases, minimizing the confusion caused by the inflow of external resources in the event of a disaster, and receiving effective support.
Terahertz conductivity of high-quality indium films deposited using a substrate cooling method
Choi Geunchang,Choi Dong-Hwan,Ryeom Junho,Park Dae Young,Kim Wu-Sin,Kim Ju-Jin,Bahk Young-Mi,Jeong Mun Seok 한국물리학회 2023 Current Applied Physics Vol.52 No.-
High-quality indium thin films were fabricated by substrate cooling method during the metal deposition. The cooling effect reduced the threshold thickness for insulator-to-metal transition, which originates from the interconnections between the indium nano-islands. The complex conductivities of the films were measured by terahertz time-domain spectroscopy. We showed that the conductivity of the indium films prepared by substrate cooling were ~10 times higher than that deposited at room temperature, even though thickness of the former was lower than that of the latter film. Our results suggest that substrate cooling is promising for the applications of metal thin films and contacts.