• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.6
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• pp.1207-1213
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• 2007

This paper has researched water supply facilities management using real-time water utility monitoring system based on USN(Ubiquitous Sensor Network) which is consisted of wireless sensors transferring waterworks facilities md treatment information about a valve-room and flowmeter-room of water supply installation. In the manholes, it was installed with flowmeter, pressure sensors, vibration sensors, Co-sensors, and hydro-thermograph sensors. These measurement values which are received by PDA are used for facilities operation on the spot safely and conveniently. It has also provided safe installation management via CDMA(Code Division Multiple Access) network which transfers data to remote servers to monitoring at a distance place. With safety management system of water supply facilities on USN technology convenience and safety is increased in real situation, and it is expected that we can supply clean water to people as much safer and more effective water supply installation management.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.90-93
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• 2016

본 논문에서는 Sub-GHz band module을 Drone에 탑재하여 Drone과 전원공유로 Node(Drone)간 Low power and Long range Ad-hoc communication을 할 수 있는 방법을 제안하고자 한다. 또한 이동성이 있는 Node(Drone)의 Low power and Long range communication을 위해서 Drone에 적합한 Asynchronous MAC (medium access control) protocol을 비교분석하여 적용하였다. 본 고에서는 무선 센서 네트워크의 응용 범위가 확대되면서 고정된 인프라 없이 Drone간에 실시간 정보를 통신 할 수 있게 하고 사람의 이동이 어렵고 위험한 재난지역, 방사선노출지역 또는 우천시 유인기와 사람의 접근이 불가능한 지역을 Drone이 대신 이동하여 인명피해를 줄이고 안전하게 필요한 데이터를 수집하여 상황관제실로 전송하는 서비스를 제공하고자 한다.

• Annual Conference on Human and Language Technology
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• 2021.10a
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• pp.16-21
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• 2021

소방 본부의 119 종합상황실에서는 24시간 국민의 안전을 위해 긴급 신고를 접수한다. 수보사 분들은 24시간 교대 근무를 하며 신고 전화에 접수 및 응대 뿐만 아니라 출동, 지휘, 관제 업무를 함께 수행한다. 이 논문에서는 이 같은 수보사의 업무 지원을 위해 우리가 구축한 음성 인식과 결합된 실시간 텍스트 분석 시스템에 대해서 소개하고, 출동 지령서 자동 작성을 위한 키워드 검출 및 대화 요약 및 개체명 인식에 기반한 대화 상태 추척 방법에 대해 설명하고자 한다. 대화 요약 기술은 음성 인식 결과를 실시간으로 분석하여 중요한 키워드의 검출 및 지령서 자동 작성을 위한 후처리를 수행하며, 문장 수준에서 개체명 인식 및 관계 분석을 통한 목적 대화의 대화 상태 추적을 수행한다. 이 같은 응용 시스템은 딥러닝 및 기계학습 기반의 자연어 처리 시스템이 실시간으로 텍스트 분석을 수행할 수 있는 기술 수준이 되었음을 보여주며, 긴급한 상황에서 많은 신고 전화를 접수하는 수보사의 업무 효율 증진 뿐만 아니라, 정확하고 신속한 위치 파악으로 신고자를 도와주어 국민안전 증진에 도움을 줄 수 있을 것으로 기대된다.

• The Journal of the Convergence on Culture Technology
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• v.9 no.2
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• pp.327-332
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• 2023

On December 26, 2022, North Korea's drone provocation resumed for the first time in eight years. The threat covered not only the Seoul metropolitan area but also the no-fly zone for the presidential office's security, and the South Korean military's response to it is not appropriate, which is a major controversy. In the midst of this, problems caused by the prohibition of small drones' flight and illegal intrusion into restricted areas are increasing in Korea, and the threat is becoming a reality, such as being used for terrorist attacks abroad. In this paper, the concept of "Counter-Drone" and related technologies were considered for these drone threats, and implications were derived through domestic and overseas small drone threats, and the direction of development of the Counter-Drone system was presented. North Korea's drone threat is expected to be more diversified, massified, and advanced, resulting in bolder attacks and provocations. Therefore, the South Korean military should push for early powering of the integrated control system and the conter drone system, joint and military cooperation in response to the threat of small drones, and the ability to carry out joint operations between South Korea and the U.S.

• Journal of Advanced Navigation Technology
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• v.22 no.2
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• pp.76-83
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• 2018

In order to prevent overusing the fishing gear and to reduce discarded fishing gear, there is a need for a technique that can efficiently transmit the information including the type and location of the fishing gear and the user's real name to the fishing boat and the control center using IoT-based communication. In order to do this, it is necessary to be able to confirm the position information of a plurality of buoys that can be identified by the base stations on the land. In this paper, in order to service the maritime IoT communication system, we calculate the link budget between the land base station and the targets on the sea to derive the service coverage. To design a marine IoT radio network for building a fishing gear monitoring system, we calculate link budget for wireless service optimization at sea for NB-IoT using 1.8 GHz frequency band and LoRa service using 900 MHz frequency band. In addition, the link budget between the land base station and buoy, the link budget between the land base station and fishing boat are calculated and the results are analyzed.