• 대한원격탐사학회지
• /
• 제38권5_2호
• /
• pp.661-667
• /
• 2022

원격탐사와 GIS를 활용한 공간자료 분석은 재난 관리에 효율적인 기술로 이를 활용한 재난정보 제공을 위한 자료 분석 및 기술 개발에 관한 연구가 활발히 진행되고 있다. 특히 군집위성의 발사와 다양한 원격탐사 플랫폼의 활용, 취득된 데이터 처리 및 저장 능력의 향상, 인공지능 기술의 발달 등으로 인해 재난 관리를 위한 원격탐사와 GIS 기술의 활용은 많은 발전의 여지를 가지고 있다. 이번 특별호에는 재난의 예측, 감시 그리고 대응 단계에서 선박탐지, 건축물 추출, 해양환경 감시, 홍수탐지, 산불탐지, 그리고 재난 발생시 의사결정지원에 적용 가능한 원격탐사와 GIS 기술의 개발과 활용한 관련한 10편의 논문이 게재되었다. 이번 특별호에 출판된 논문들은 재난 관리 기술의 발전과 연관 학문 분야의 학술적 발전에 밑거름이 될 것으로 판단된다.

• 한국재난정보학회 논문집
• /
• 제15권4호
• /
• pp.578-589
• /
• 2019

군사용으로 개발된 드론은 최근 들어 농업, 산업, 방송중계, 경찰, 소방, 레저 등 광범위한 활용 분야를 넓혀가고 있다. 드론은 IT 기술과 결합하여 활용 분야를 더욱 넓혀가고 있고, 4차 산업의 핵심으로 부상하고 있다. 연구목적: 본 연구에서는 재난 예방, 대비, 대응 등 재난 방재 분야에서 활용 가능한 드론을 설계하고 구현하는 것을 목적으로 하였다. 연구방법: 본 연구는 문헌조사를 바탕으로 하드웨어 드론 스펙을 조사하고 연구목적에 맞는 프로그램을 개발하는 방법으로 수행하였다. 연구결과: 본 연구에서는 원격조종이 가능한 드론을 개발하고, 드론 원격조종을 위한 프로그램 방안을 조사하고, 드론에서 원격조종 방송이 가능한 프로그램을 개발하였다. 결론: 해당 드론은 재난현장에서 원거리 원격조종, 원격방송 등의 기능을 바탕으로 재난분야에서 활용될 수 있을 것이다.

• 정보보호학회논문지
• /
• 제25권1호
• /
• pp.49-60
• /
• 2015

스마트그리드 기기는 스마트그리드의 주요 구성요소로 전력 서비스와 관련된 다양한 정보를 수집 및 처리하고, 주변의 다른 스마트그리드 기기 또는 상위 시스템들과 정보를 송 수신하여 보다 지능화된 전력 제공 서비스 제공한다. 하지만 이러한 스마트그리드 기기들은 보안 침해사고 발생 시 다른 스마트그리드 기기 또는 상위 주요 시스템으로 침입할 수 있는 경로로 활용될 수 있으며, 이로 인해 전력 서비스에 큰 장애가 발생 할 수 있다. 따라서 보안 침해사고 발생 시 전력 서비스의 가용성 확보를 위해 스마트그리드 기기에 대한 증거 수집 및 분석, 복구 등에 있어 보다 신속한 대응이 요구된다. 본 논문에서는 이러한 스마트그리드 기기에서 발생될 수 있는 보안 침해사고를 보다 신속하게 대응하기 위해 스마트그리드 기기의 운영환경을 분석하여 원격 증거 수집 시스템이 기존 IT환경에 비해 스마트그리드 환경에서 보다 효과적으로 적용 및 운영됨을 제시하였으며, 이를 바탕으로 스마트그리드 기기 운영환경을 고려한 스마트그리드 기기 원격 증거 수집 시스템 설계 방안을 제시하였다.

• Smart Structures and Systems
• /
• 제16권2호
• /
• pp.263-280
• /
• 2015

Microwave remote sensing is probably the most recent experimental technique suitable to the non-contact measurement of deflections on large structures, in static or dynamic conditions. In the first part of the paper, the main techniques adopted in microwave remote sensing are described, so that advantages and potential issues of these techniques are presented and discussed. Subsequently, the paper addresses the application of the radar technology to the measurement of the vibration response on the stay cables of two cable-stayed bridges. The dynamic tests were performed in operational conditions (i.e. with the excitation being mainly provided by micro-tremors, wind and traffic) and the maximum deflections of the cables were generally lower than 5.0 mm. The investigation clearly highlights: (a) the safe and simple use of the radar on site and its effectiveness to simultaneously measure the dynamic response of all the stay cables of an array; (b) the negligible effects of the typical issues and uncertainties that might affect the radar measurements; (c) the accuracy of the results provided by the microwave remote sensing in terms of natural frequencies and tension forces of the stay cables; (d) the suitability of microwave interferometry to the repeated application within Structural Health Monitoring programmes.

• 제어로봇시스템학회:학술대회논문집
• /
• 제어로봇시스템학회 1997년도 한국자동제어학술회의논문집; 한국전력공사 서울연수원; 17-18 Oct. 1997
• /
• pp.752-755
• /
• 1997

In this paper, a scheduling algorithm is proposed for a programmable logic controller(PLC) with remote I/Os, assuming the multi-tasking facilities. Since sequence programs are executed on the application processor and I/O data are transmitted by the network processor concurrently, the proposed algorithm schedules the data transmission as well as the sequence program execution. The suggested algorithm guarantees the bounded WCRT(worst case response time), which is the one third of the WCRT in the absence of scheduling. Computer simulation shows that the algorithm can be easily applied to a real PLC without critical constraints on utilization of resources and inter-relation among tasks.

• Nuclear Engineering and Technology
• /
• 제49권7호
• /
• pp.1414-1422
• /
• 2017

Remote response technology has advanced to the extent that a robot system, if properly designed and deployed, may greatly help respond to beyond-design-basis accidents at nuclear power plants. Particularly in the aftermath of the Fukushima accident, there is increasing interest in developing disaster robots that can be deployed in lieu of a human operator to the field to perform mitigating actions in the harsh environment caused by extreme natural hazards. The nuclear robotics team of the Korea Atomic Energy Research Institute (KAERI) is also endeavoring to construct disaster robots and, first of all, is interested in finding out to what extent safety benefits can be achieved by such a disaster robotic system. This paper discusses a new approach based on the probabilistic risk assessment (PRA) technique, which can be used to quantify safety benefits associated with disaster robots, along with a case study for seismic-induced station blackout condition. The results indicate that to avoid core damage in this special case a robot system with reliability > 0.65 is needed because otherwise core damage is inevitable. Therefore, considerable efforts are needed to improve the reliability of disaster robots, because without assurance of high reliability, remote response techniques will not be practically used.

• 드라이브 ㆍ 컨트롤
• /
• 제16권3호
• /
• pp.59-66
• /
• 2019

Hydraulic systems are essential for most of the construction equipments due to their various advantages, such as very powerful, quick response speed, precision control and remote control. Moreover, they are necessary to apply the electro hydraulic systems for precise and remote controls. Operating the small electronic joystick of the remote controller for the control of a multipurpose work machine with remote control technology increases the possibility of a sudden operation compared to the use of a conventional hydraulic joystick. When a joystick is suddenly operated, the peak pressure is generated in the system due to the quick response of the system. Then a vibration is generated due to the peak pressure, which causes instability to the operation of the construction equipment. Therefore, in this study, we confirmed the level of reduction of peak pressure occurring in the electro hydraulic system by using AMESim, when the output signal of the step shape generated by the sudden operation of the electronic joystick was changed by using the convolution operation.

• 대한원격탐사학회지
• /
• 제39권1호
• /
• pp.99-110
• /
• 2023

Land surface temperature (LST) is a critical environmental indicator affected by land cover (LC) changes. Currently, the most convenient and fastest way to retrieve LST is to use remote sensing images due to their continuous monitoring of the Earth's surface. The work intended to investigate land cover change and temperature response inAn-Najaf province. Landsat multispectral imageries acquired inAugust 1989, 2004, and 2021 were employed to estimate land cover change and LST responses. The findings exhibited an increase in water bodies, built-up areas, plantations, and croplands by 7.78%, 7.27%, 6.98%, 3.24%, and 7.78%, respectively, while bare soil decreased by 25.27% for the period (1989-2021). This indicates a transition from barren lands to different land cover types. The contribution index (CI) was employed to depict how changes in land cover categories altered mean region surface temperatures. The highest LSTs recorded were in bare lands (42.2℃, 44.25℃, and 46.9℃), followed by built-up zones (41.6℃, 43.96℃, and 44.89℃), cropland (30.9℃, 32.96℃, and 34.76℃), plantations (35.4℃, 36.97℃, and 38.92℃), and water bodies (27.3℃, 29.35℃, and 29.68℃) respectively, in 1989, 2004, and 2021. Consequently, these changes resulted in significant variances in LST between different LC types.

• 대한원격탐사학회:학술대회논문집
• /
• 대한원격탐사학회 2003년도 Proceedings of ACRS 2003 ISRS
• /
• pp.790-792
• /
• 2003

The remote sensing image server provides advanced image serving capabilities for geospatial image. Wide seamless image mosaics of Landsat 5 over GMS countries, which exceed a 15 GB or more in size per image, can integrate with other GIS map servers. The approach of two improvement algorithms leads to speed up the response time while preserving the data quality. This system does not only provide images on the web, but also provide GIS layers to WMS client map servers. The advantage of this approach is its efficiency lower cost in terms of cost, time and updating to obtain and utilize remote sensing image.

• 대한인간공학회지
• /
• 제28권3호
• /
• pp.103-114
• /
• 2009

This study investigated perceived discomfort and reasons related to use three information technology products (personal computer, mobile phone and digital television remote controller), and extracted the universal design factors. 240 people (30 females and 30 males for four age groups) participated in the one-to-one interview type of questionnaire, and replied to degree of discomfort at level of items and the reasons of discomfort at level of detailed elements for each product. As a result, almost all age groups answered that using input buttons of mobile phone and remote controller and watching display of mobile phone caused discomfort. Binary logistic regression of the detailed elements showed that response rate of discomfort mostly increased with age, except for specific elements such as shape of mouse and remote controller, and location of function button of mobile phone. Some of the detailed elements had high response rate of discomfort from all age groups. The age groups also showed similar tendency for the elements to select one alternative for the reason of discomfort, but not for sound volume and size of mobile phone and button sensitivity of remote controller. Finally, the universal design factors were extracted for each product based on the results, and divided into common factors and factors classified by the age group. Through this study, we identified using practices of various age groups and their demands for the products. It is expected that extracted detailed elements can be considered as important design factors to design the products universally.