• Title/Summary/Keyword: experimental modules

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Development of Experimental Modules Using Everyday Life Materials to Enhance Science Process Skills (과학 탐구능력 향상을 위한 실생활 소재 모듈의 개발)

  • Kim, Soo-Kyoung;Cha, Hee-Young;Kim, Jung-Bog
    • Journal of The Korean Association For Science Education
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    • v.25 no.7
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    • pp.754-764
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    • 2005
  • The purpose of this study was to develop experimental modules that would enhance science the process skills of secondary school students. The modules were composed of real-life materials on the subjects of light, movement, force, water, and heat. Each module consisted of four to six activities, and provided student worksheets and teacher guides. Physics teachers were invited to a workshop specially held to identify whether these modules would befit the improvement of student science process skills. A majority of the teachers believed the modules to be valuable instructional materials which might enhance student science process skills in the Korean secondary school science classes.

Experimental Operation Analysis of Unified Power Flow Controller with Cascaded H-Bridge Modules (다계 H-브리지 모듈로 구성된 UPFC(Unified Power Flow Compensator)의 실험적 동작분석)

  • Baek, Seung-Taek;Bae, Byung-Yeol;han, Byung-Moon;Baek, Doo-Hyun;Jang, Byung-Hoon;Yoon, Jong-Soo;Kim, Soo-Yeol
    • Proceedings of the KIPE Conference
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    • 2005.07a
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    • pp.389-391
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    • 2005
  • This paper describes experimental analysis of UPFC, which is composed of cascaded H-bridge modules and single-phase multi-winding transformers for isolation. The operational characteristic was analyzed through experimental works with a scaled model, and simulation results with PSCAD/EMTDC. The UPFC proposed In this paper can be directly connected to the transmission line without series injection transformers. It has flexibility to expand the operation voltage by increasing the number of H-bridge modules. The analysis results can be utilized to design the actual UPFC system applicable for the transmission system.

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Experimental Operation Analysis of Unified Power Flow Controller with Cascaded H-Bridge Modules (다계 H-브리지 모듈로 구성된 UPFC(Unified Power flow Compensator)의 실험적 동작분석)

  • Baek Seung-Tak;Han Byung-Moon;Choo Jin-Boo;Chang Byung-Hoon;Yoon Jong-Su
    • The Transactions of the Korean Institute of Electrical Engineers B
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    • v.54 no.9
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    • pp.422-430
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    • 2005
  • This paper describes experimental analysis of UPFC, which is composed of cascaded H-bridge modules and single-phase multi-winding transformers for isolation. The operational characteristic was analyzed through experimental works with a scaled model, and simulation results with PSCAD/EMTDC. The UPFC proposed in this paper can be directly connected to the transmission line without series injection transformers. It has flexibility to expand the operation voltage by increasing the number of H-bridge modules. The analysis results can be utilized to design the actual WFC system applicable for the transmission system.

Optimized Installation and Operations of Battery Energy Storage System and Electric Double Layer Capacitor Modules for Renewable Energy Based Intermittent Generation

  • Min, Sang Won;Kim, Seog Ju;Hur, Don
    • Journal of Electrical Engineering and Technology
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    • v.8 no.2
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    • pp.238-243
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    • 2013
  • In this paper, a novel approach for optimized installation and operations of battery energy storage system (BESS) and electric double layer capacitor (EDLC) modules for the renewable energy based intermittent generation is presented for them to be connected with an electric power grid. In order to make use of not merely the high energy density of battery but also the high power density of EDLC modules, it is very useful to devise the hybrid system which combines BESS and EDLC modules. The proposed method adopts the linear programming to calculate the optimized capacity as well as the quadratic programming to transmit the optimal operational signals to BESS and EDLC modules. The efficiency of this methodology will be demonstrated in the experimental study with the real data of wind speed in Texas.

Implementation of Internet Based Control by Developing LonWorks Intelligent Control Modules

  • W.P. Hong;Park, W.G.
    • 제어로봇시스템학회:학술대회논문집
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    • 2001.10a
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    • pp.70.5-70
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    • 2001
  • This paper proposes a new Internet based control concept & design method and implementation of LonWorks network system for remote intelligent control. The experimental network system using i.LON Web server is designed and fabricated. It is also verified that the developed control modules with LonTalk protocol have available, interoperable, and reliable performance characteristics from the experimental results. Especially, the results provide a available technical data for remote home, building & plant automation control.

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The Production Flow of Compact 155Mbps transmitter / receiver optical modules (축소한 155Mbps 송수신 모듈들의 공정도)

  • Kim, Sang-Kon;Eu, Jai-Hong
    • Proceedings of the Optical Society of Korea Conference
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    • 1997.08a
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    • pp.111-113
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    • 1997
  • The purpose of this paper is to propose a production flow for 155Mbps transmitter/receiver optical modules. Compact optical module packages for use as 155Mbps optical interfaces are developed by implementing a self-alignment principle for the formation of V-grooves and solder bumps. on the bases of experimental results of two hundreds of receiver/transmitter optical modules, each steps and flows of our production are developed by production efficiencies.

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Dynamic Selection of Neural Network Modules based on Cellular Automata for Complex Behaviors (복잡한 행동을 위한 셀룰라 오토마타 기반 신경망 모듈의 동적선택)

  • Kim, Kyung-Joong;Cho, Sung-Bae
    • The Transactions of the Korean Institute of Electrical Engineers D
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    • v.51 no.4
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    • pp.160-166
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    • 2002
  • Since conventional mobile robot control with one module has limitation to solve complex problems, there have been a variety of works on combining multiple modules for solving them. Recently, many researchers attempt to develop mobile robot controllers using artificial life techniques. In this paper, we develop a mobile robot controller using cellular automata based neural networks, where complex tasks are divided to simple sub-tasks and optimal neural structure of each sub-task is explored by genetic algorithm. Neural network modules are combined dynamically using the action selection mechanism, where basic behavior modules compete each other by inhibition and cooperation. Khepera mobile robot simulator is used to verify the proposed model. Experimental results show that complex behaviors emerge from the combination of low-level behavior modules.

Development of data acquisition and analysis program modules for leakage current of polymeric insulators using the Labview software (Labview를 이용한 배전용 폴리머애자의 누설전류 측정 및 분석 프로그램 개발)

  • Cho, Seong-Soo;Han, Sang-Ok
    • Proceedings of the KIEE Conference
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    • 2000.07c
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    • pp.1969-1971
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    • 2000
  • This paper presents a data acquisition and analysis program modules that has been developed using the Labview program. These program modules can use to acquire and analyze leakage current data of insulator under different contamination conditions. The experimental hardware made up salt fog chamber, AC/DC power supply, transducer (shunt resistor), measurement devices and PC with the GPIB (General Purpose Interface Bus). And analysis program modules can calculate pulse level count, accumulated charge, average leakage current, power spectrum, and harmonics. The result of applying these analytical program modules to polymeric insulator is available for evaluation of leakage current characteristic of outdoor insulators.

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The Thermal Performance Comparison of BIPVT Collector Applied on Roofs and Facades (건물 적용 유형별 BIPVT 집열기 열적 실험성능 비교)

  • Gang, Jun-Gu;Kim, Jin-Hui;Kim, Jun-Tae
    • Proceedings of the Korean Society for Emotion and Sensibility Conference
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    • 2009.11a
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    • pp.269-272
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    • 2009
  • The temperature of PV modules that integrated into building facades or roof increases that could reduce the electrical efficiency of the PV system. In order to incresae PV system's efficiency it is very important to remove the heat from the PV modules. For this purpose, hot air can be extracted from the space between PV modules and building envelope, and used for heating in buildings. The solar collector utilizing this thermal effect is called photovoltaic-thermal(PVT) solar collector. This paper compares the experimental performance of building-integrated PVT collectors that applied on building roof and facade. There are two different case: a roof-integrated PVT type and a facade-integrated PVT type. The experimental results show that the collected thermal energy of the roof-integrated type was 24% higher, compared to that of the facade-integrated.

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Experimental study on flexural strength of modular composite profile beams

  • Ahn, Hyung-Joon;Ryu, Soo-Hyun
    • Steel and Composite Structures
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    • v.7 no.1
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    • pp.71-85
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    • 2007
  • This study suggests modular composite profile beams, where the prefab concept is applied to existing composite profile beams. The prefab concept produces a beam of desired size having two types of profile: side module and bottom module. Module section will improve construction efforts because it offers several benefits : reduction of deflections due to creep and shrinkage, which might be found in existing composite profile beams; increase in span/depth ratio; and free prefabrication of any required beams. Based on the established analysis theory of composite profile beams, an analysis theory of modular composite profile beams was suggested, and analysis values were compared with experimental ones. The behavior of individual modules with increase of load was measured with a strain gauge, and the shear connection ratio between modules was analyzed by using the measured values. As a result of experiment, it was found that theoretical flexural strength on condition of full connection was 57%-80% by connection of modules for each specimen, and it is expected that flexural strength will approximate the theoretical levels through further module improvement.