• Journal of the Korea Institute of Military Science and Technology
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• v.4 no.2
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• pp.227-232
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• 2001

IPresented is a small and handy remotely piloted vehicle(RPV) that can be used for military and non-military surveillance operations. The RPV is equipped with an on-board high resolution color camera to transmit the analog video images and on-board electronics to provide real-time flight information to the pilot, thereby enabling him/her to remotely pilot within the range of 5 km radius. This paper describes the RPV system including its design, manufacturing and flight test results which manifest the stability of on-board mission and flight equipment as well as the remote piloting capability. A future plan for necessary improvements identified from the flight tests are also discussed.

• Proceedings of the KIEE Conference
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• 2005.07a
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• pp.344-346
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• 2005

GPS(Global Positioning System)를 기반으로 하는 PMU(Phasor Measurement Unit)에서 측정된 페이저 정보는 사용자에게 계통의 여러 가지 동특성 정보를 제공한다. 이러한 PMU 정보는 지역과 중앙에서 취득하여 계통의 안정도를 감시, 판단하는 방법으로 활용할 수 있다. 최근에는 여기에 발전된 컴퓨터 연산기능과 통신 기술을 접목하여 다양한 분야의 실시간 계통감시 기술이 연구되고 있다. 본 논문에서는 광역감시를 위하여 2곳 이상의 PMU 정보를 활용하는 VIP++ 알고리듬을 소개하고 시험계통을 이용한 모의를 통해 VIP++ 알고리듬의 유용성을 검증해 보인다.

• Proceedings of the Korean Association of Geographic Inforamtion Studies Conference
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• 2008.10a
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• pp.352-353
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• 2008

국제표준화기구(ISO)에서는 장비에 대한 표준화작업을 ISO/TC172에서 관리하고 있으며 산하의 전문위원회인 SC6에 속해있는 ISO17123 $1{\sim}8$은 주로 측량장비의 정밀도를 참조할 때 인용되는 표준으로 그중에서 ISO17123-8: GNSS field measurement systems in real-time kinematic(RTK)은 GNSS의 RTK 정확도평가방법으로서 약식시험절차와 엄밀시험절차를 규정하고 있다. 본 연구에서는 ISO17123-8의 규격을 분석하고 이 규격에 따라 GPS RTK Test-bed를 시험구축하고 정확도 평가방법에 따라 관측값 Testing하는데 목적이 있다.

• 한국디지털정책학회:학술대회논문집
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• 2004.05a
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• pp.525-544
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• 2004

The Purpose of this study is to examine logistics characteristics related to electronic commerce and to suggest improvement of logistics Service in electronic commerce. This paper concerns the logistics functions which are essential for completing a commerce process even under the EC environment and provides ways to improve the logistics performance. Electronic commerce have introduced two scenes; dramatic change of the existing distribution surroundings and noticeable achievement of the economic advance and social efficiency. But, in the same scene, electronic commerce can be a threat to business condition, especially logistics management. It suggests that for activation of EC it is necessary to strengthen the strategic alliances, introduce GPS and use the third party logistics positively to prepare for the settlements of traffic problems, support the introduction of integrated logistics service and logistics information system.

• The Transactions of the Korean Institute of Electrical Engineers P
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• v.63 no.1
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• pp.1-6
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• 2014

An electric power system sometimes fails because of disturbances that occur unexpectedly, such as the uncontrolled loss of load that developed from cascading blackout. Which make stability through a little of under voltage load shedding should work. The development of phasor measurement unit(PMU) makes network supervision possible. The information obtained from PMU is synchronized by global positioning system(GPS). There are many real-time algorithms which are monitoring the voltage stability. This paper presents the study on the VILS(Voltage Instability Load Shedding) using PMU data. This algorithm computes Voltage Stability Margin Index(VSMI) continuously to track the voltage stability margin at local bus level. The VSMI is expressed as active and reactive power. The VSMI is used as an criterion for load shedding. In order to examine the algorithm is effective, applied to KEPCO system.

• Journal of the Korea Institute of Military Science and Technology
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• v.11 no.3
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• pp.30-39
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• 2008

An artificial vision aided NDGPS/INS system has been developed and tested in the dynamic environment of ground and flight vehicles to evaluate the overall system performance. The results show the significant advantages in position accuracy and situation awareness. Accuracy meets the CAT-I precision approach and landing using NDGPS/INS integration. Also we confirm the proposed system is effective enough to improve flight safety by using artificial vision. The system design, software algorithm, and flight test results are presented in details.

• Proceedings of the Korea Information Processing Society Conference
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• 2016.10a
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• pp.127-128
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• 2016

본 연구는 자동차가 갑자기 고장이 나거나 사고가 났을 때 스마트폰 어플리케이션을 이용해 현 사고지점 위치정보를 사용자에 의해 서버에 전송하고, 휴대폰에 내장된 GPS 모듈 및 Bluetooth를 이용하여 삼각대에 부착된 Bluetooth와 연결하여 자동으로 서버에서 현 사고지점 위치정보를 받아들여 분석할 수 있는 시스템에 관한 것이다. 서버에는 사용자에 의해 등록되어진 현 사고지점의 위치정보, 사고다발지역을 분석하고 관리하는 시스템을 구축한다. 이 시스템을 활용하면 운행 중 사고지점의 정보를 실시간으로 활용할 수 있어 2차 사고에 대한 예방 및 최적의 운행정보를 감지할 수 있다.

• Proceedings of the KIEE Conference
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• 2002.11c
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• pp.274-277
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• 2002

This paper deals with the attitude determination using GPS carrier phase. The main factors on attitude reliability are accuracy, error factors and the real-time ambiguity resolution speed. Firstly, these factors are reviewed. And then, the attitude reliability is improved by applying the averaging method. Finally, the attitude determination software is verified by the experiments. The accuracy of the proposed attitude determination method is 0.013$^{\circ}$ PE in live test. This result is more accurate than the existing INS equipment.

• Agribusiness and Information Management
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• v.1 no.2
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• pp.23-42
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• 2009

As technology develops, more advanced technologies involving GPS, GIS, RFID and sensor networks have been adopted in agriculture sector for u-Farm. However, technology adoptions have been evaluated as ineffective. Farmers and agri-business have low level of understanding on technology so it is not efficiently utilized. This study introduces a case of RFID/sensor networks of mushroom farm as a u-Farm case study, focusing on developing a framework for analysis of u-Farm investment returns. RFID and sensor networks improve real-time production control, processing management, and traceability. Integration of RFID and sensor networks leads to innovation into the mushroom farm, reducing labor cost, increasing productivity, and improving quality of the mushroom. The ROI which is used as an indicator of performance indicator is 413%.

• Journal of Korea Society of Industrial Information Systems
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• v.18 no.6
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• pp.1-8
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• 2013

Recently, as increasing use of smartphone, the development of social network service(SNS) applications is very active because of the mobility of smartphone. In addition, as the demand of the location based service(LBS) supporting mobile information is expanded, LBS combined with SNS improves the usability of smart phones. This paper proposes the smartphone application that provides the information for SNS generated depending on the location, by tracking the user's location in real time.