• Proceedings of the Korea Information Processing Society Conference
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• 2012.11a
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• pp.1060-1063
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• 2012

기존의 네트워크 관문에서 트래픽을 검사하는 장치들은 Application 계층의 데이터를 검사할 수 없어 보안에 한계가 있다. 이를 보완하기 위해 Application 계층까지 패킷을 분석할 수 있는 Deep Packet Inspection (DPI)기술이 개발되어 보안 강화에 사용되고 있다. 하지만 기업에서 DPI 기술을 이용하여 고객의 개인정보를 무단으로 수집 및 이용하면서 DPI 기술에 따른 개인정보 침해가 우려된다, 본 논문에서는 DPI 기술을 통한 사용자 정보 수집 시 개별 사용자의 동의를 받을 수 있는 방안을 제안하며, 이를 통해 DPI 기술에 따른 사용자 개인정보 문제를 해결하고자 한다.

• Korean Journal of Food Science and Technology
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• v.22 no.4
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• pp.479-485
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• 1990

For the automation of a evaporation process, computer based evaporation system was built and applied to acquisition of the process variables with an centrifugal thin film evaporator(Centri-Therm, CT-1B). Controls of the process conditions were performed by computer system for pressure, feeding rate, steam, evaporation temperature and flow rate of cooling water. The data acquisitions were also performed by computer system for the changes in the concentration and temperature readings for steam, evaporation and cooling water at the both inlet and outlet. The control and the acquisition variables were collected through the interface device and analyzed by programs using the PASCAL language. To control the feeding rate during the concentration process, inverter was used. The cooling water for the vapor condensation was controlled by the valve controller and should be supplied with the flow rate of 125 kg/h. The maximum vapor condensation rate was 41.7kg/h at the feeding rate of 125 kg/h.

• Proceedings of the KIEE Conference
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• 2002.07a
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• pp.102-104
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• 2002

시각 동기화된 계통 운전데이터를 이용하여 계통의 안정성을 실시간으로 감시, 분석하는 전력계통 온라인 안정성 감시, 분석시스템을 개발하였다. 개발된 시스템은 대용량 발전소와 주요 345kV 전력소에 설치되어 GPS를 이용한 시각 동기화 된 계통 운전데이터를 측정하고, 지역사고 판단 및 사고데이터를 기록하며, 측정/기록데이터를 Master 시스템으로 온라인 전송해주는 Local 시스템과 각 Local 시스템에서 전송되어진 측정/기록데이터를 수집하고, 광역사고 판단 및 사고데이터를 기록하며. 과도안정도를 온라인으로 평가해주는 Master 시스템으로 구성되어 있다. 전력계통 온라인 안정성 감시, 분석시스템 중 Local 시스템은 울진, 영광, 고리 원자력발전소와 동서울, 신제천, 청양, 아산, 신옥천 전력소 등 8개소에 설치하고, Master 시스템은 한국전력거래소(KPX)에 설치하여 우리 계통의 안정운용을 위해 활용할 예정이다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.36 no.8B
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• pp.1003-1011
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• 2011

In this paper, a real-time multi-source sensor data management system based on wireless sensor network is proposed and implemented. The proposed management system is designed to transmit the wireless data to the server in order to monitor and control the multi-source target's status efficiently by analyzing them. The proposed system is implemented to make it possible to control and transmit the wireless sensor data by classifying them, of which data are issued from the clustered sources composed of a number of the remote multiple sensors. In order to evaluate the performance of the proposed system, we measure and analyze both the transmission delay time according to the distance and the data loss rate issued from multiple data sources. From these results, it is verified that the proposed system has a good performance.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.686-688
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• 2010

The supply of context information is increasing with the propagation of ubiquitous computing environment. Recently, as context information is being collected through electronic tags and sensors attached to the environment, we need methods to efficiently store and search large volumes of data. This paper describes the application of the RLE (Run Length Encoding) compression method for sensors that continuously collect data in USN/RFID terminals.Time information is marked on the data and one data block is generated and saved. This paper proposes a storage method that allows us to quickly search data of the desired time and place by recording time information in continuous data.

• Journal of KIISE
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• v.43 no.7
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• pp.781-785
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• 2016

Learning from human behaviors in the real world is essential for human-aware intelligent systems such as smart assistants and autonomous robots. Most of research focuses on correlations between sensory patterns and a label for each activity. However, human activity is a combination of several event contexts and is a narrative story in and of itself. We propose a novel approach of human activity prediction based on event cognition. Egocentric multi-sensor data are collected from an individual's daily life by using a wearable device and smartphone. Event contexts about location, scene and activities are then recognized, and finally the users" daily activities are predicted from a decision rule based on the event contexts. The proposed method has been evaluated on a wearable sensor data collected from the real world over 2 weeks by 2 people. Experimental results showed improved recognition accuracies when using the proposed method comparing to results directly using sensory features.

• Journal of the Korea Computer Industry Society
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• v.3 no.8
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• pp.1063-1072
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• 2002

Characteristics of a guitar sound changes according to the internal structure a guitar. The developed system uses a PC to analyze a guitar sound, which will have different characteristics in accordance with the internal structure of the guitar and the material that the guitar made, and make a data base. The developed system consist of three parts; a mechanical body which holds a guitar and the internal structure of the guitar can be changed easily; DSP sound acquisition boards which have multi channel sound input and A/D converting abilities with RS232C data transfer to PC abilities; and software which runs on a PC to analyze the input sound and make a data base.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.10 no.1
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• pp.140-145
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• 2009

Recently, lots of research activities have been carried out to provide advanced smart control functions applying a computer networking technology to telemeter/telecontrol systems. In this paper, we suggest client/server architecture with specially designed remote and local control software for applicant those to greenhouse model. The server system collects and integrates various datas related sensor or actuator, and stores in database maintaining high quality of remote I/O control operation. Where as the client system simply operation such as control panel on the internet web browser. Implemented system well communicate interactively both monitoring and control status of greenhouse including multimedia informations. In this study we also analyze the extent of the performance enhancement in terms of overall throughput and data transfer time effected by packet size.

• Journal of The Korean Society For Urban Railway
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• v.6 no.4
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• pp.233-241
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• 2018

Recently, integrated railway safety monitoring and control system, which is a convergence system based on data distribution service for railway safety monitoring and control, is under development. It collects safety data of vehicle, signal, power and safety monitoring facilities in real time and adopts communication middleware based on distributed service for mass data processing. However, in the case of a server device used as an existing control server, the performance of the distributed service middleware can not be exhibited due to low hardware performance due to safety reasons. In the safety control system, 200,000 packets per second were set as the transmission target, but the performance test of the LAB was not satisfied. In this paper, we analyze the characteristics of railway data to improve the data collection performance of existing equipment and apply DDS-based streaming transmission method to the data model of signal facilities and vehicle facilities with large packet amount according to the analysis result. As a result, it was confirmed that the throughput was improved about 30.4 times when the hardware performance was the same. We plan to improve the data processing performance by applying it to real-time railway safety integrated monitoring and control system in the future.

• Aerospace Engineering and Technology
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• v.4 no.2
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• pp.21-26
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• 2005

In airframe structural tests, a control system which has many control channels and a data acquisition system which has many data acquisition channels are used. The more it is used many channels in airframe structural test, the more hardware resources are added in test system. Before test load is applied in test article, test engineer must check test system and components. Therefore, many problems which be likely to happen to system can be minimized. The checking method of test system and components is calibration verification. In this paper, it is described that calibration verification concept and method in relation to airframe structural test controller components.(MTS Aero90 Multifunction Input Output Processor and 497.22 Dual DC Conditioner)