• 국제학술발표논문집
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• The 9th International Conference on Construction Engineering and Project Management
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• pp.736-743
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• 2022

Construction workers experience a high rate of fatal incidents from mobile equipment in the industry. One of the major causes is the decline in the acoustic condition of workers due to the constant exposure to construction noise. Previous studies have proposed various ways in which audio sensing and machine learning techniques can be used to track equipment's movement on the construction site but not on the audibility of safety signals. This study develops a novel framework to help automate safety surveillance in the construction site. This is done by detecting the audio sound at a different signal-to-noise ratio of -10db, -5db, 0db, 5db, and 10db to notify the worker of imminent dangers of mobile equipment. The scope of this study is focused on developing a signal processing model to help improve the audible sense of mobile equipment for workers. This study includes three-phase: (a) collect audio data of construction equipment, (b) develop a novel audio-based machine learning model for automated detection of collision hazards to be integrated into intelligent hearing protection devices, and (c) conduct field experiments to investigate the system' efficiency and latency. The outcomes showed that the proposed model detects equipment correctly and can timely notify the workers of hazardous situations.

• 한국측량학회:학술대회논문집
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• 한국측량학회 2010년 춘계학술발표회 논문집
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• pp.77-80
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• 2010

The demand for human security significantly promotes the development of surveillance applications using a multi-sensor integrated UAV system. For more sophisticated operations, the system should provide a sequence of images rectified in a ground coordinate system in realtime. This rectification requires accurate position and attitude of the camera at the time of exposure of each image, which can be estimated through an Aerial Triangulation process using the GPS/INS data and tie points between adjacent images. In this work, the KLT tracker is utilized to obtain the tie points. To satisfy the realtime requirements, we present an approach to speed up the tracker by supplying the initial guessed positions of tie points based on the exterior orientation. The experimental results show that, when the guessed positions are supplied, the KLT tracker consumed less computational time than the ordinary KLT which is more suitable to be incorporated into the realtime image georeferencing process.

• 한국멀티미디어학회논문지
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• 제24권5호
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• pp.701-708
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• 2021

As one of the most widely used technology in the world right now, Face recognition has already received widespread attention by all the researcher and institutes. It has been used in many fields such as safety protection, surveillance system, crime control and even in our ordinary life such as home security and so on. This technology with today's technology has advantages such as high connectivity and real time transformation. But we still need to improve its recognition rate, reaction time and also reduce impact of different environmental status to the whole system. So in this paper we proposed a face recognition system model with improved CNN which combining the characteristics of flat network and residual network, integrated learning, simplify network structure and enhance portability and also improve the recognition accuracy. We also used AR and ORL database to do the experiment and result shows higher recognition rate, efficiency and robustness for different image conditions.

• 한국방사성폐기물학회:학술대회논문집
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• 한국방사성폐기물학회 2005년도 춘계 학술대회
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• pp.426-427
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• 2005

Advanced Spent Fuel Conditioning Process (ACP) is a pyrochemical process in which the spent fuel of PWR is transformed into the uranic metal ingot. Through this process, which has been developed in KAERI since 1998, the radioactivity, the radiotoxicity, the heat and the volume of the PWR spent fuel are reduced by a quarter of the original. To demonstrate a lab-scale process and extract the data for the later pilot-scale process, a demonstration facility of ACP (ACPF) is under construction and the lab-scale demonstration is slated for 2006. To establish the safeguardability of ACPF, a safeguards system including a neutron counter based on non-destructive assay, which is named as ACP Safeguards Neutron Counter (ASNC), the ACP Safeguards Surveillance System (ASSS) which consists of two neutron monitors and five IAEA cameras, and Laser Induced Breakdown System (LIBS) have been developed and are ready to be installed at ACPF. The target materials of ACP to assay with ASNC are categorized into three types among which the first is the uranic metal ingot, the second is the salt waste and the last is $UO_2$ and $U_{3}O_8$ powders, rod cuts and hulls. The Pu content of process nuclear materials can be accounted with ASNC. The ASSS is integrated in the ACP Intelligent Surveillance Software (AISS) in which the IAEA camera images and background signals at the rear doors of ACPF are displayed. The composition of special nuclear materials of ACP can be measured with LIBS which can be a supporting measurement tool for ASNC. The conceptual picture of safeguards system of ACPF is shown in Fig. 1.

• 대한공간정보학회지
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• 제16권3호
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• pp.87-94
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• 2008

이 연구에서는 복합형 환승센터의 돌발상황 대응을 위한 모니터링 대상의 선정과 돌발상황 모니터링, 검지, 확인, 전파, 처리, 종료까지의 진행 절차에서 관리되는 정보를 도출하고 데이터베이스로 통합관리 하도록 하여 상황진행 단계에 따라 상황처리 의사결정에 필요한 사전정보를 제공하도록 제시하였다. 시설물, 이용자, 교통류로 구성된 환승센터는 모니터링 정보의 한계성을 가지고 있다. 따라서 상황검지 및 상황대응 전략수립 방안에서는 상황대응 전문가의 경험 지식과 과거의 사례를 활용할 수 있는 전문가 시스템의 사례기반 추론을 활용하는 방안으로 접근하였다. 또한 돌발상황 발생 시 공간적 혼잡도 및 피해 최소화를 위해 환승센터에서 운영하고 있는 설비의 통제 방안을 제시하였으며, 대외기관의 서비스 지원 극대화를 위해 실시간으로 상황정보의 공유 서비스 체계가 유지되도록 하였다.

• 한국해양공학회지
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• 제29권6호
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• pp.488-498
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• 2015

This paper presents the dynamic model of an AUV called HW200 for underwater surveillance. The mathematical model of HW200 is briefly introduced, considering its shape. The maneuvering coefficients were initially estimated using empirical formulas and a database of vehicles with similar shapes. A motion simulator, based on Simulink of Mathworks, was developed to evaluate the mathematical model of the vehicle and to tune the maneuvering coefficients. The parameters were finely tuned by comparing the experimental results and simulated responses generated with the simulator by applying the same control inputs as the experiment. The velocity of HW200 in the tuning process was fixed at a constant forward speed of 1.83 m/s. Simulations with variable speed commands were conducted, and the results showed good consistency in the motion response, attitude, and velocity of the vehicle, which were similar to those of the experiment even under the speed variation. This paper also discusses the feasibility of its application to a model-based integrated navigation system (INS) using the auxiliary information on the velocities generated by the model.

• Strategy21
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• 통권34호
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• pp.178-206
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• 2014

The battlefield environment in the maritime has been changed by advanced IT technology, variation of naval warfare condition, and developed military science and technology. In addition, state-of-the-art surface combatants has become to multi-purpose battleship that is heavily armed in order to meet actively in composed future sea battlefield condition and perform multi-purpose missions as well as having capability of strategic strike. To maximize the combat strength and survivability of ship, it is not only possible for Zumwalt(DDG-1000) class combatant to conduct multi-purpose mission with advanced weapon system installation, innovative hull form and upper structure such as deckhouse, shipboard high-powered sensor, total ship computing environment, and integrated power control but it was designed so that can be installed with energy based weapon systems in immediate future. Zumwalt class combatant has been set a high value with enormous threatening surface battleship in the present, it seems to be expected that this ship will be restraint means during operation in the littoral. The advent of Zumwalt class battleship in the US Navy can be constructed as a powerful intention of naval strength building for preparing future warfare. It is required surface ship that can be perform multi-purpose mission when the trend of constructed surface combatants was analyzed. In addition, shipboard system has been continuously modernized to keep the optimized ship and maximize the survivability with high-powered detection and surveillance sensor as well as modularity of combat system to efficient operation.

• 대한원격탐사학회지
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• 제32권3호
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• pp.323-330
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• 2016

2010년 발사된 천리안 위성에는 3개의 탑재체가 있으며, 그 중 미래창조과학부와 전자통신연구원에서 개발한 Ka-band 통신 탑재체가 있다. 본 연구에서는 천리안 통신위성을 이용하여 구축한 실시간 원격 선박 모니터링 체계를 소개한다. 이 체계는 실시간 자료 수집, 실시간 자료 전송, 실시간 자료처리/가시화, 크게 총 3단계로 구성된다. 논문에서는 각 단계 수행을 위해 설치한 H/W와 개발한 S/W 내역, 그리고 실시간 자료 수집에서부터, 실시간 전송, 실시간 처리 및 가시화에 이르기까지 과정에 대해 상세히 기술한다. 또한 이러한 과정을 위해 각 단계에서 요구되는 H/W 및 S/W의 기능적 요구사항과 구축 시 고려되어야 하는 사항 등에 대해서도 기술한다. 현재 해당 체계를 이용하여 소청초 해양과학기지에 설치된 AIS로부터 수집되는 선박자료를 준실시간 전송하고, 과학기지 주변 해역의 원격 선박 모니터링을 진행 중이다. 이러한 실시간 원격 모니터링 체계는 효율적인 해양 감시, 사고에 대한 신속한 대응을 가능하게 하며, 특히 이러한 통신 위성 활용 체계는 향후 차세대 민관방송통신위성의 해양분야 통신활용 방향 도출에 있어 매우 유용하게 활용될 수 있을 것으로 기대한다.

• 안보군사학연구
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• 통권2호
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• pp.285-314
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• 2004

The forms of current war are diversified over the pan-national industry. Among these, one kind of threats which has permeated the cyber space based on the advanced information technology causes a new type of war. C4ISR, the military IT revolution, as a integrated technology innovation of Command, Control, Communications, Computer, Intelligence, Surveillance and Reconnaissance suggests that the aspect of the future war hereafter is changing much. In this paper, we design the virtual decoy system and intrusion trace marking mechanism which can capture various attempts and evidence of intrusion by hackers in cyber space, trace the penetration path and protect a system. By the suggested technique, we can identify and traceback the traces of intrusion in cyber space, or take a legal action with the seized evidence.

• 한국인터넷방송통신학회논문지
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• 제19권6호
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• pp.9-13
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• 2019

본 논문에서는 IoT 기반 열상 센서와 영상 센서 일체형 IP CCTV 설계에 관하여 연구하였으며 Full HD IP 카메라 영상과 열상모듈에서 전송되어지는 열상 데이터를 동시에 인지하여 가공 및 전송 할 수 있는 모니터링 시스템에 사용할 수 있도록 하였다. 열상 센서에서 감지하는 신호를 디지털로 변환하여 영상에 중첩시켜 실제 주변 온도에 대한 정보를 영상과 함께 실시간 제공하고, 영상 카메라에 열상이 추가됨으로 온도 변화를 예측하여 기존 장비에서 불가능한 화재 예측이 가능하게 하였다. 따라서 열상 센서와 영상센서 일체형 감시 장비를 통하여 환경 모니터링 시스템에서 전송되는 온도 데이터와 영상 신호를 송신하여 모니터링 시스템에 적용 가능하도록 하였다.