• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.361-367
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• 2003

Ad-hoc network is a multi-hop wireless network formed by a collection of mobile nodes without the aid of any establish infrastructure and this network can provide an extremely flexible method for establishing communications for fire, safety, rescue operations, battle field or other fields requiring rapidly deployable communications with survivable, efficient dynamic networking. Recently new expended mechanism is proposed as Ad-hoc relay system, so guarantee of QoS for multimedia applications is needed more and more. In this paper, we propose ARM based QoS Distribution Monitoring Mechanism to provide Quality of Service guarantees to multimedia application with MANET.

• Proceedings of the KIEE Conference
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• 2006.10c
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• pp.151-153
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• 2006

When distributed powers are interconnected to the grid, lack of source stability may cause some events that should be measured and stored as soon as they occur. This paper presents a real-time hardware system that has been developed for quick and reliable monitoring of the distributed powers quality. The system is composed of a digital signal processor (MPC7410, Motorola) and a 16 bits A/D board (VMIVME3122, GE). To guarantee the real time operation, it is based on a real time OS (VxWorks). Hardware tests of the embedded system have been made to check the performances of the proposed system. Test signals of several events are generated by using a LabView (hardware) system. The tests show that the system complies with the desired IEEE standard for power quality monitoring.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.11a
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• pp.136-137
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• 2023

비닐하우스 외부 미세먼지로 인해 일사량이 감소하여 작물 품질 및 생산량의 감소가 지속적으로 발생하고 있으며 이를 예방하기 위한 외부 미세먼지 관리가 가능한 시스템이 요구된다. 본 연구는 라즈베리파이를 활용하여 미세먼지 관리 및 모니터링 시스템을 연구하고, 이를 농업 및 환경 연구 분야에 활용함으로써 미세먼지 관리에 새로운 가능성을 제시한다. 이는 관리자가 애플리케이션을 통해 비닐하우스 외부를 효율적으로 관리하여 품질 및 생산성 향상에 기여한다.

• Proceedings of the Korean Society of Computer Information Conference
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• 2021.01a
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• pp.45-46
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• 2021

의료영상이란 의료영상장비로부터 DICOM이라는 의료영상표준에 따라 저장되며, 의료영상관리 시스템인 PACS를 통해 관리된다. 이러한, 의료영상장비 ICT기술이 융합되어 급격하게 발전되고 있으며 다양한 의료영상장치가 개발되어지고 있다. 하지만, 기술력은 높아지고 있으나 개발된 의료영상장비로부터 촬영된 영상품질관리에 대한 문제점이 제기되고 있다. 이와 관련하여 다기관의 의료영상장비 개발과 해당 기기로부터 수집된 의료영상에 대한 품질을 관리할 필요성이 증가하고 있다. 따라서 코로나 19와 같은 상황에서 의료기기 개발 지원과 관리를 비대면 관리서비스 시스템 개발과 의료영상장치 개발 정도를 관리할 수 있을 뿐만 아니라 의료영상에 대한 품질까지 모니터링하여 및 개선 할 수 있는 시스템을 제안하고자 한다.

• Journal of Welding and Joining
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• v.30 no.1
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• pp.44-50
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• 2012

• 한국도로학회:학술대회논문집
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• 2004.10a
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• pp.331-338
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• 2004

• Proceedings of the Korean Society of Laser Processing Conference
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• 2003.05a
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• pp.39-42
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• 2003

• Proceedings of the KWS Conference
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• 2002.05a
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• pp.74-77
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• 2002

• Proceedings of the Korean Society of Laser Processing Conference
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• 1999.11a
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• pp.53-55
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• 1999

• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.7
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• pp.1326-1331
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• 2006

Weld root gap is a important fact of a falling-off weld quality in various kind of weld defect. The welding quality can be controlled by monitoring important parameters, such as, the Arc voltage, welding current and welding speed during the welding process. Welding systems use either a vision sensor or an Arc sensor, both of which are unable to control these parameters directly. Therefore, it is difficult to obtain necessary bead geometry without automatically controlling the welding parameters through the sensors. In this paper we propose a novel approach using neural networks for detecting and monitoring of weld root gap and bead shape. Through experiments we demonstrate that the proposed system can be used for real welding processes. The results demonstrate that the system can efficiently estimate the weld bead shape and detect the welding defects.