• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.11
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• pp.2050-2056
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• 2008

A realization for moving object sensing and tracking system in two dimensional plane using stereo line CCDs and lighting source is presented in this paper. The system is realized that instead of processing camera images directly, two line CCD sensor and input line image is used to measure two dimensional distance by comparing the brightness on line CCDs. The algorithms are used the moving object sensing, path tracking and coordinate converting method. To ensure the effective detection of moving path, a detection algorithm to evaluate the reliability of each measured distance is developed. The realized system results are that the performance of moving object recognizing shows 5mm resolution, and enables to track a moving path of object per looms period.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.4
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• pp.782-791
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• 2005

In this paper, path planning and tracking problems are mentioned to guarantee efficient and safe navigation of autonomous mobile robots. We focus on the path planning and also deal with the path tracking and obstacle avoidance. We improved the conventional distance transform (DT) algorithm for the path planning. Using the improved DT algorithm, we obtain paths with shorter distances compared to the conventional DT algorithm. In the stage of the Path tracking, we employ the fuzzy logic controller to conduct the path tracking behavior and obstacle avoidance behavior. Through computer simulation studies, we show the effectiveness of the Nosed navigational algorithm for autonomous mobile robots.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.295-299
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• 2005

In this paper, path planning and tracking problems are mentioned to guarantee efficient and safe navigation of autonomous mobile robots. We focus on the path planning and also deal with the path tracking and obstacle avoidance. We improved the conventional distance transform (DT) algorithm for the path planning. Using the improved DT algorithm, we obtain paths with shorter distances compared to the conventional DT algorithm. In the stage of the path tracking, we employ the fuzzy logic controller to conduct the path tracking behavior and obstacle avoidance behavior. Through computer simulation studies, we show the effectiveness of the proposed navigational algorithm for autonomous mobile robots.

• Proceedings of the KIEE Conference
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• 2008.07a
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• pp.1519-1520
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• 2008

이 논문에서는 이동로봇의 경로추적문제를 다항 퍼지 모델로 나타내고 SOSTOOL을 이용하여 해결하고자 한다. 제안하는 방법은 기존의 LMI을 사용한 방법과 비교하여 작은 제어입력과 이동로봇이 주어진 경로를 쫓아감에 있어 매끄러운 결과를 나타냄을 알 수 있다. 본 논문에서는 이동로봇 기구학을 시스템의 안정성 문제로 변형하고 이를 퍼지모델로 구성하여 SOSTOOL을 사용하여 제어입력을 구하고 모의실험을 통해 그 결과를 검증하도록 한다.

• Convergence Security Journal
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• v.13 no.1
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• pp.19-24
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• 2013

MANET has a highly dynamic topology because it consists of only mobile nodes. Various attacks using these characteristics exist. Among them, damage of the attacks based flooding such as DoS or DDos is large and traceback of the attack node is not easy. It is because route information by moving of intermediate nodes which pass the data changes frequently. In this paper, we propose table-based traceback technique to perform efficient traceback although route information by moving of nodes changes frequently. Cluster head manages route management table in order to form cluster status table and network topology snapshot for storing the location information of mobile nodes when cluster member nodes change. Also, bloom filter is used to reduce the amount of storing route information. The performance of the proposed technique is confirmed through experiment.

• Proceedings of the Korean Society of Fisheries Technology Conference
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• 2000.10a
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• pp.31-32
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• 2000

어군의 이동경로(Priede ＆ Swift, 1993)를 어류 외적인 주변 환경변수와 어류의 내적인 생리생태 등에 따른 행동요인을 고려하여 보다 합리적이고 논리적인 방법으로 어군탐색을 효율적으로 수행할 필요가 있으며, 따라서 어류이동경로 추적에 대한 모델링과 시뮬레이션(Arnolds ＆ Holford, 1995) 기법의 개발이 필요한 실정이다. 따라서 본 연구는 저서성 어류의 이동 궤적에 관한 현장 계측자료를 해양환경요인과 관련시켜 분석하고, 어류이동에 관한 수치행동의 모델링의 주요한 변수를 파악하였다. (중략)

• Proceedings of the Korea Water Resources Association Conference
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• 1997.05a
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• pp.486-491
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• 1997

• Proceedings of the Korean Institute of Intelligent Systems Conference
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• 2008.04a
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• pp.107-110
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• 2008

군집 로봇(swarm robots)의 경우 작업을 수행하기 위해서는 여러 로봇의 협동 작업이 필요하게 된다. 따라서 로봇이 주어진 환경을 인식하고 모델링 하는 것, 주어진 복잡한 작업을 분석하고 단순한 작업으로 나누는 것, 로봇에서 주어진 작업을 효과적으로 이행하는 것 등이 연구의 핵심이 되고 있다. 침입자 발견시 군집 로봇이 침입자를 효과적으로 추적하기 위해서는 다양한 경로를 통해 침입자가 이동할 수 있는 경로를 예상하고 분산 이동해야 한다. 본 논문에서는 알려진 맵에서 군집 로봇이 침입자를 효과적으로 추적하기 위한 분산 이동 방법을 제안한다.

• The Journal of the Korea Contents Association
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• v.11 no.2
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• pp.135-141
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• 2011

Mobile communication technology in the field of ubiquitous computing is one of important technologies. The development of GPS technology in mobile communications technology and PDA, the vast majority of mobile devices such as smart phones also being equipped with GPS functionality. This user where they are located where they are based on the number of through services were able to receive information. In this paper, mounted on a mobile device user's location using GPS capabilities to track the migration routes and the accumulated user to determine the migratory path of the system used to recommend the proposed route of the proposed method and system Designs. The services offered by tracking the location of the user to move the user to route data to create and upload to the server. Upload a migration path to move data from where they currently reside to the user is recommended to go to your destination. The services offered by the users do not know where to travel or go to your destination, etc. If you do not remember the path can be useful.

• The KIPS Transactions:PartC
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• v.14C no.1 s.111
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• pp.105-114
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• 2007

In sensor network processing environments, current location tracking methods have problems in accuracy on receiving the transmitted data and pinpointing the exact locations depending on the applied methods, and also have limitations on decision making and monitoring the situations because of the lack of considering context-awareness. In order to overcome such limitations, we proposed a method which utilized context-awareness in a data processing module which tracks a location of the magnetic object(Magnetic Line Tracer) and controlled introspection data based on magnetic sensor. Also, in order to prove its effectiveness we have built a wireless sensor network test-bed and conducted various location tracking experiments of line tracer using the data and resulted in processing of context-aware data. Using the new data, we have analyzed the effectiveness of the proposed method for locating the information database entries and for controlling the route of line tracer depending on context-awareness.