• Review of KIISC
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• v.6 no.1
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• pp.103-116
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• 1996

재난에 관한 내용적 연구로서 실시간 재난복구를 위한 의사결정지원시스템과, 과정적 연구로서 재난복구를 위한 위기관리모형을 설명한다. 또한, 정보시스템의 재난복구전략을 구체적으로 기술하고, 특히 Comdisco사의 실시간 재난복구서비스 사례를 제시하고자 한다.

• Proceedings of the Korean Information Science Society Conference
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• 2004.04b
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• pp.772-774
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• 2004

선택적 주의선택 알고리즘 중 색상과 밝기 지도를 만드는 부분을 실시간 처리에 적용하고, 저주파수가 주로 분포하는 영역과 물체의 움직임이 감지된 영역을 입력 영상에서 찾아내어 가중치별로 합산함으로서 실시간으로 선택적 주의를 줄 수 있는 시스템을 구현했다.

• Journal of the Korean Association of Geographic Information Studies
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• v.9 no.4
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• pp.12-21
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• 2006

Recently, Very large and high resolution geological data from aerial or satellite imagery are available. Many researches and applications require to do realtime visualization of interest geological area or entire planet. Important operation of wide-spreaded terrain realtime visualization technique is the appropriate model resolution selection from pre-processed multi-resolution model hierarchy depend upon participant's view. For embodying such realtime rendering system with large geometric data, Preprocessing multi-resolution hierarchy from large scale geological information of interest area is required. In this research, recent Cubic multiresolution 4-8 tile hierarchy is selected for global planetary applications. Based upon the tile hierarchy, It constructs the selective terminal level tile mesh for original geological information area and starts to sample individual generated tiles for terminal level tiles. It completes the hierarchy by constructing intermediate tiles with low pass filtering in bottom-up direction. This research embodies series of efficient cubic 4-8 tile hierarchy construction mechanism with out-of-core storage. The planetary scale Mars' geographical altitude data and image data were selected for the experiment.

• 제어로봇시스템학회:학술대회논문집
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• 1993.10a
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• pp.1006-1011
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• 1993

In this study, a DNC(Distributed Numerical Control) management system is designed that can directly control and manage hybrid CNC machine tools on real-time. And management software is developed to inter-communicate field informations with CNC controllers using an interface processor(Intelligent Multi Communication Board, IMCB). Especially, IMCB supports that DNC system sends and receives part program with CNC controllers in the form of real-time multi-tasking.

• Proceedings of the KSR Conference
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• 2002.10b
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• pp.1053-1058
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• 2002

Calibration of the health monitoring system is considered in this study. For this, brief introduction on the realtime monitoring system, installed in some of the Korea Highspeed Railway bridges, is made and specifications of the calibrators are outlined. Calibration method is next explained for each sensor and detailed procedures are illustrated. Calibration results will be published elsewhere and modification of the gauge factors will also be investigated in detail.

• Journal of Institute of Control, Robotics and Systems
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• v.15 no.4
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• pp.406-412
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• 2009

ECG is used on purpose to keep good health or monitor cardiac function of aged person as well as on purpose to diagnose the disease of heart patients. The ambulatory ECG monitoring system under guarantee of safety and accuracy is very efficient to prevent the progress of heart disease and sudden death. These systems can detect the temporary change of ECG that is very significant to diagnose heart disease such as myocardial ischemia, arrhyamia and cardiac infarction. In this paper, we describe the ECG signal analysis algorithm and measurement device for ECG monitoring. The authors designed a small-size portable ECG device that consisted of instrumentation amplifier, micro-controller, filter and RF module. The device measures ECG with four electrodes on the body and detects QRS complex and ST level change in realtime. Also it transmits the measured signals to the personal computer. The developed software for ECG analysis in personal computer has the function to detect the feature points and ST level changes.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.11 no.6
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• pp.311-317
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• 2011

In this paper, we proposed realtime image enhancing method on the three noise types of input images, such as haze, low contrast and back light images. Some conventional de-hazing algorithms have good performance but need large memories and high computational burdens. We proposed the efficient algorithm which not only removes the haze but also reduces memory usage and computational complexity. We implemented the realtime system by using DM6446 DSP chip, and it showed the excellent result in these three problems; haze, low contrast and back light. We implemented the system with the processing speed at 15 frames/sec.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.14 no.6
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• pp.2992-2998
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• 2013

The future mobile communication system can support not only voice but also multimedia applications such as data, image and video. It requires greater resources than the voice-oriented mobile system. We propose user and sub-channel priority based resource allocation for mobile multimedia services in the OFDMA systems. Our method is able to guarantee QoS continuity of realtime services and carry the maximum number of non-realtime subscriber. Simulation is focused on total throughput and blocking rate. The simulation results show that our proposed method provides a better performance than the conventional method.

• Journal of the Korean Society for Precision Engineering
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• v.16 no.10
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• pp.45-52
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• 1999

The online realtime positioning error compensation system 'SKY-PACS' is developed to correct geometric errors, thermal errors and tool deflection errors induced by cutting forces on the vertical machining center. 'SKY-PACS' communicates position commands and position compensation signals with the CNC controller at 100Hz, which is CNC control frequency. So the compensation procedure can be applied during axis movement. Using 'SKY-PACS', Maximum 1 axis positioning accuracy was corrected from 5{\mu}m$ to 2{\mu}m$and the squareness error of X-Y table was corrected from 51{\mu}m$/m to below 4{\mu}m$/m. The error compensation under the cutting condition is carried out by ISO10791-7. And the measurement of test-pieces shows that the roundness is corrected rom 8{\mu}m$ to below 5{\mu}m$.

• The Journal of Korean Association of Computer Education
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• v.8 no.1
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• pp.33-42
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• 2005

The purpose of this study is to develop MICHS(Models of Interactive Cyber Home Study) for effective cyber home study(CHS) and a prototype system to support realtime and non-realtime interaction tools such as chatting with users, to study a method to connect MICHS with selective curriculum, and to verify the educational effect of the model. MICHS consists of two models. One model is an educational system model, and another model is a teaching-learning model. The major results of this study are summarized as follows. In the viewpoint of learning achievement, there is no significant difference in achievement between the experimental group(33 leaners) and the comparative group(33 leaners), but this fact can be construed as the possibility that CHS is an alternative system of school education. The interests on CHS of learners in the experimental group were increased twice. This result means that the system of CHS for active interaction needs various and important interaction tools, and the educational vision of CHS. In the viewpoint of system operation, CHS needs higher system requirements such as 100 Mbps Fast Ethernet. If an old system can not process streaming services in request, it should be upgraded to a new system.