• Journal of the Korea Institute of Information and Communication Engineering
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• v.10 no.10
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• pp.1905-1913
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• 2006

The researches about the hardware and the software implementing ubiquitous sensor network have great rush in recent years. This paper deals the development of a sensor node with the dual interface which also has an RF wireless interface while has an Bluetooth interface used widely in present. This sensor node includes a Atmeg32 microcontroller, a Bluetooth module, a RF module. a temperature-humidity sensor. and I also develop the F/Ws controlling each modules with C language using GCC compiler. The sensor node developed can reaches 15m with Bluetooth interface and 60m with RF interface. It works stably with the voltage above 5V and it consumes currents 21mA average in idle mode, 63mA average in active mode.

• The Journal of Korea Institute of Information, Electronics, and Communication Technology
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• v.1 no.1
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• pp.35-39
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• 2008

In this paper, we have developed a propagation loss prediction software with GUI (Graphic User Interface) functions, based on the geometrical ray optics model, which can predict radio parameters for the deployment of wireless indoor network. The program has two numerical modules consisted with electrical image and ray launching methods to implement UTD theory. The simulated results are compared with reported data measured in the foreign building environments for office and '一' type corridor, and measured and simulated results for the propagation loss agree with each other quite well. Simulation results for '一' type corridor and 'T' type corridor propagation environment are shown for reference.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.05a
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• pp.293-295
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• 2018

The final stage of the 3D work is rendering. After all, all 3D works are looking at via this rendered result, so the importance of the Rendering cannot be overstated. Because this is the final stage of 3D work, it requires a lot of theoretical and functional training in rendering control. However, However, it is difficult to invest as much time in college education in a limited period. This paper will compare and analyze the characteristics, and merits and demerits of these various kinds of Renderer (MARI, QUIXEL, Substace designer), and showed the result of analyses about the fact that educating which of the above 4 Renderers are helpful and beneficial for the students for the efficient education in the university where should teach much in the limited time.

• Journal of Digital Contents Society
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• v.6 no.1
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• pp.1-5
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• 2005

This paper describes the main characteristics of Grid Services based on OGSA and a Grid service for aggregating service data element(SDE)s. In order to build a Grid Service, it needs to consider a systematic building approach from the high-level software architecture that represents the main system components and their interactions. The purpose of this paper is to design and implement an extended service data aggregator service in which SDE is a basic unit for collecting resource information. A GT3 based service data aggregator service is extended to apply the multiple collections based storage scheme for maintaining persistently SDEs with a XML DBMS Xindice. To provide efficient aggregating service for service data elements, which is running under wide area environment like Internet, the aggregator service is asynchronously operated by notification mechanism.

• Journal of the Korean Society of Surveying, Geodesy, Photogrammetry and Cartography
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• v.16 no.2
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• pp.271-279
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• 1998

This paper discusses the development of compaction management system using Real Time Kinematic (RTK) GPS technology for the efficient management or compaction. The use or RTK provides the land surveyors with a graphical display of his/her corrected position on the ground at that moment in time. In this work, we intended to improve the efficiency of compaction management showing the route of rollers and the total number of compaction obtained from management software (GPSROLL v.1.0) developed in this study. The RTK GPS system installed on the roller. To improve the efficiency of field management, GPSROLL software provides also data processing module for the field soil test and the field surveying data. GPSROLL system is based on the Korean GUI for user-friendly data input and output.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2018.10a
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• pp.62-65
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• 2018

This paper comes out with the study on sensing data collection strategy in a Software-Defined Mobile Edge vehicular networking. The two cooperative data dissemination are Direct Vehicular cloud mode and edge cell trajectory prediction decision mode. In direct vehicular cloud, the vehicle observe its neighboring vehicles and sets up vehicular cloud for cooperative sensing data collection, the data collection output can be transmitted from vehicles participating in the cooperative sensing data collection computation to the vehicle on which the sensing data collection request originate through V2V communication. The vehicle on which computation originate will reassemble the computation out-put and send to the closest RSU. The SDMEVN (Software Defined Mobile Edge Vehicular Network) Controller determines how much effort the sensing data collection request requires and calculates the number of RSUs required to support coverage of one RSU to the other. We set up a simulation scenario based on realistic traffic and communication features and demonstrate the scalability of the proposed solution.

• The Transactions of the Korean Institute of Power Electronics
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• v.14 no.3
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• pp.211-219
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• 2009

In this paper, a detailed analysis of zero current or zero voltage switching boost converter using a single switch is described. The proposed topology is capable of decreasing switching loss of IGBT device using soft switching technique. As a results, it can be reduced size and weight of passive elements. Based on the mode analysis, practical design considerations are presented. We confirm the converter topology, principle of operation and simulation results obtained from the PSIM software. The performance of the proposed converter is verified by with 1kW(400V, 2.5A) prototype circuit operated at 30kHz.

• KSBB Journal
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• v.11 no.6
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• pp.704-711
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• 1996

An optimal process design of a foreign protein production system was carried out using a bioprocess flowsheeting software, BioPro Designer, with a capability of economic analysis. The flowsheeting program was applied to a production system of the tailspike protein of Salmonella phage P22, and helped save time and efforts in selecting an optimal process. A wild type tailspike and two types of mutant tailspikes, tsf G244\longrightarrow,R and Su A334\longrightarrowV, were considered in this study to show that the folding characteristics of foreign protein produced inside host influenced the selection of the best production system. An optimal production system for mature tailspike was chosen under the criterion of capital investment per unit mass of mature protein recovered.

• KIPS Transactions on Software and Data Engineering
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• v.11 no.3
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• pp.115-124
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• 2022

In this paper, YOLO and EAST models are tested to analyze their performance in text area detecting for real-world and normal text images. The earl ier YOLO models which include YOLOv3 have been known to underperform in detecting text areas for given images, but the recently released YOLOv4 and YOLOv5 achieved promising performances to detect text area included in various images. Experimental results show that both of YOLO v4 and v5 models are expected to be widely used for text detection in the filed of scene text recognition in the future.

• JOURNAL OF ELECTRICAL WORLD
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• s.264
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• pp.70-78
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• 1998

석유 등의 화석연료가 연소되면서 발생하는 이산화탄소를 주체로 하는 ''온실효과가스''의 배출량이 점점 더 증가해 감에 따라 지구온난화가 국제적으로도 커다란 환경문제가 되고 있다. 이산화탄소의 배출을 억제하기 위한 구체적인 시책은 바로 자에너지(에너지 절약/ 이용합리화)의 수행이다. 이번에 자에너지를 주목적으로, ISO14001의 환경매니지먼트 모델을 전체적으로 지원하는 공장에너지관리시스템과 조명$\cdot$빌딩분야에서 환경매니지먼트 모델을 지원하는 조명제어시스템 및 빌딩 설비 감시시스템을 구축하였다. 신규개발한 Controller의 소프트웨어는 24시간 가동가능한 OS(Operating System)에 제어미들웨어를 탑재하여 Object설계방법으로 제작된 기능별 어플리케이션 소프트웨어를 각 시스템별로 조합한다. 하드웨어는 퍼스컴과 동일한 DOS/V머신 구성으로 하여 시스템의 주체가 되는 부송부의 하드웨어를 개발하였다. 구축한 각 시스템의 내용은 다음과 같다. (1)공장에너지관리시스템 수집한 에너지사용량 데이터를 관리$\cdot$분석용으로 가공하는 생에너지 지원용 어플리케이션 소프트웨어를 탑재하고있어 환경매니지먼트 시스템(ISO14001)을 실행하는 데에도 유용하다. (2)조명제어시스템 지금까지 단독기기였던 조도일정제어의 조광컨트롤러에 B/NET 전송기능을 탑재하여 스케줄 및 디맨드 감시에 의한 조광제어를 시행하여 한층 더 생에너지를 실현한다. (3)빌딩설비 감시시스템 빌딩의 에너지관리, 조명$\cdot$공조제어에 의한 생에너지화, 보전업무의 효율화$\cdot$생력화를 실현한다.