• Journal of the Korean Society for Aeronautical & Space Sciences
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• v.39 no.4
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• pp.362-369
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• 2011

In this paper, vSLAM aided integrated navigation system is implemented and performance analysis of the system is completed via flight test. The system can suppress divergence of position error of INS only system by updating vSLAM correction information when temporary GPS signal outage occurs in bad radio condition. In the flight test, integrated hardware containing GPS, IMU and camera is loaded under RC electric helicopter. Performance of the integrated navigation system is verified by comparing estimated position of INS/vSLAM system with that of INS only system.

• Journal of Platform Technology
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• v.9 no.1
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• pp.32-39
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• 2021

Existing environmental measuring devices mainly focus on electromagnetic wave and eco-friendly product certification and durability test, and sensor reliability verification and verification of measurement data are conducted mainly through sensor performance evaluation through type approval and registration, acceptance test, initial calibration, and periodic test. This platform has established an ICT-based environmental monitoring sensor reliability verification system that supports not only performance evaluation for each target sensor, but also a verification system for sensor data reliability. A sensor board to collect sensor data for environmental information was produced, and a sensor and data reliability evaluation and verification service system was standardized. In addition, to evaluate and verify the reliability of sensor data based on ICT, a sensor data platform monitoring prototype using LoRa communication was produced, and the test was conducted in smart cities. To analyze the data received through the system, an optimization algorithm was developed using machine learning. Through this, a sensor big data analysis system is established for reliability verification, and the foundation for an integrated evaluation and verification system is provide.

• Journal of Platform Technology
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• v.10 no.4
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• pp.62-69
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• 2022

Flight control systems installed on unmanned aircraft require thorough verification from the design stage. This verification is made through the integrated flight control test environment. Typically, a debugger is used to monitor the internal state of a flight control computer in real time. Emulator with a real-time memory monitor and trace is relatively expensive. The JTAG Emulator is unable to operate in real time and has limitations that cannot be caught up with the processing speed of latest high-speed processors. In this paper, we describe the results of the development of internal monitoring software for drone flight control computer processors based on NUTTX/PIXHAWK. The results of this study show that the functions provided compared to commercial debugger are limited, but it can be sufficiently used to verify the flight control system using this system under limited budget.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.47 no.6
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• pp.19-27
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• 2010

Many security issues occur in cloud computing service environment such as authentication, access control, and so on. In this paper, we propose an effective authentication and access control model which provide integrated management and control when we access various resources in cloud computing environment. To address these problems, we suggest a context-aware single sign-on and access control system using context-awareness, integrated authentication, access control, and OSGi service platform in cloud computing environment. And we show design and implementation of context-aware single sign-on and access control system. Also we verified the flexibility and convenience of the proposed system through multi fact based integrated authentication in cloud computing environment. We could provide flexible and secure seamless security service by user context in cloud computing environment.

• Proceedings of KOSOMES biannual meeting
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• 2004.11a
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• pp.13-16
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• 2004

2001년 9월 11일 미국에 대한 항공기 데러 이후 해상화물운송선박 및 항만시설에 대한 해상 테레에 대비하고자 IMO에서 "국제선박 및 항만시설보안 코드(ISPS Code)"를 제정 및 채택하여 2004년1월 1일부터 발효 중이다. 이와 관련하여 선박에서 이를 적용하기 위하여 해운선사에서는 많은 노력을 경주하였으며 보안시스템을 효과적으로 운영하는가에 대한 검증은 선박보안심사를 통하여 이루어지고 있다. 또한 보안시스템을 운영하고자 할 경우에는 회사보안책임자, 선박보안책임자 및 해상종사자에 대한 효과적인 사전교육이 반드시 필요한 실정이다. 따라서 향후 선박보안심사는 ISM 심사와의 차이를 고려하여 시스템의 이해 및 운영, 보안설비 정비, 보안사건 발생시 비상대응 및 시스템활동기록의 검증에 집중하여야 하며 ISM 심사와의 통합형태가 되어야 할 것이다. 또한 선박보안교육의 경우에는 교육기관을 통한 보안교육에만 의존할 것이 아니라 승선 전 및 승선 후 교육을 통하여 보안의식을 고양시키어야 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.1
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• pp.56-65
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• 2007

Existing application systems of enterprises can process and collect a lot of information within enterprises, but it could be difficult to share validated information with partners and other system in the process of contacting to other legacy systems required in cooperation environment. For solving these problems, EAI systems are introduced in cooperation environment so that data sharing and integration can be achieved. The integration based on EAI is not limited to particular business system but all systems of an enterprise so that standard of suitable metadata level is needed for forwarding consistently between each business of systems. Therefore this paper maintains consistency of data sharing and integrating among legacy systems in cooperative environment for proposing message exchanging based on bridge XMDR.

• Journal of Advanced Navigation Technology
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• v.23 no.5
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• pp.345-351
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• 2019

Avionics System Integration Laboratory is an integrated test environment for the integration and the verification of avionics systems. Recently, in order to fully consider the requirements verification of avionics system from the aspect of the entire system integration, the participation in the development of the SIL field is advanced from the requirement analysis of the aircraft. Efforts are being made to minimize the cost and the period of development of a SIL so that it does not affect the overall schedule of the aircraft development. We propose the avionics simulation model framework (ASMF) based on the modeling formalism applicable to SIL in order to reduce development period/cost and increase maintenance by standardizing the modeling methods of SIL.

• Journal of Digital Convergence
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• v.18 no.6
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• pp.245-253
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• 2020

The purpose of the research was to identify the level of accounting information system for SMBs and environmental factors, and to analyze whether the level of accounting information system affects system performance. The research method measured the AIS level using Nolan's growth phase model, and the verification of the factors affecting the situation, AIS level, and performance was verified using the regression analysis model. The results of the study are summarized as follows: In measuring the level of an accounting information system, it was found that it was in the stage of integration, which is Step 4, and the analysis of the factors influencing the level of an accounting information system showed that the uncertainty in the environment was absolutely affected.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2022.11a
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• pp.209-211
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• 2022

우리나라 R-Mode(Ranging Mode) 항법시스템은 국제해사기구(IMO, International Maritime Organization)에서 요구하는 항구 입출항용 항법 요구성능(정밀도 10m)을 만족하도록 개발을 진행하고 있다. R-Mode 항법시스템은 위성국 송출을 기반으로 하는 GPS와 달리 지상국 송출을 기반으로 한다. 또한 신호가 세기가 높아서 의도적 전파간섭이 어려우므로 국제해사기구가 요구하는 강인한 PNT(Resilient PNT) 시스템에 적합한 것으로 평가받고 있다. 이러한 요구조건과 기회신호(SoOp, Signal of Opportunity)의 국내 환경에 맞추어 중파(MF, Middle Frequency) 및 초단파(VHF, Very High Frequency)를 이용하는 항법시스템을 개발하고 있다. 해양수산부의 지원으로 2020년에 착수하여 4국의 중파 R-Mode 송신국과 3국의 초단파 VDES R-Mode 송신국 구축을 진행하고 있다. 항법 성능을 확보하기 위하여 R-Mode 보정시스템과 R-Mode 감시시스템을 구축하였다. 해양에서 R-Mode 항법시스템의 성능을 검증하기 위하여 중파 R-Mode 수신기, VDES R-Mode 수신기 및 이를 포함하는 통합항법수신기를 함께 개발하고 있다. 항법 송신기 및 수신기의 성능 검증을 위한 테스트베드는 기존의 지상파 항법(eLoran) 서비스 영역, 중파 R-Mode 서비스 영역 및 주요 항만 등을 고려하여 충청남도 서산시 대산항 지역으로 선정하였다. 보정국 및 감시국을 포함하는 테스트베드 기지국은 대산항에 설치하여 운영을 시작하였다. 테스트베드 실해역 시험을 통한 성능 검증은 2023년 상반기에 진행될 계획이다.

• Proceedings of the Korean Society of Surveying, Geodesy, Photogrammetry, and Cartography Conference
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• 2010.04a
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• pp.121-123
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• 2010

Currently different local governments and research institutes have established and using DB for each purposes on the heterogeneous database. Normally physical unification method is used in order to unify this geospatial database, but this takes too much time and resources and require periodic renewal and synchronization. Therefore, this research would like to present a logical integrated unification method based on attribute information of heterogeneous database, and a system design and construction method, in order to subjugate inefficiencies from the physical unification method. Through this a system that could supply user customized geospatial database was established and verified the functionality using the road data of an actual region.