• Journal of Practical Engineering Education
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• v.9 no.2
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• pp.99-106
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• 2017

The most important thing in STEAM education is to enhance students' interest and understanding of science and technology. In this paper, we propose basic circuit system design and control method applicable to STEAM fusion education. The circuit system design practice using the breadboard is designated as an essential curriculum in the corresponding department at the high school and college level in the domestic curriculum. However, there is a lack of STEAM convergence implementation examples that can easily understand circuit system design and control methods. Therefore, we proposed and tested a method to implement and control a media art type circuit system.

• Journal of Astronomy and Space Sciences
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• v.24 no.1
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• pp.79-90
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• 2007

The AmonRa instrument, the primary payload of the international EARTHSHINE mission, is designed for measurement of deep space albedo from L1 halo orbit. We report the optical design, tolerance analysis and the optical performance of the breadborad AmonRa imaging channel instrument optimized for the mission science requirements. In particular, an advanced wavefront feedback process control technique was used for the instrumentation process including part fabrication, system alignment and integration. The measured performances for the complete breadboard system are the RMS 0.091 wave(test wavelength: 632.8 nm) in wavefront error, the ensquared energy of 61.7%($in\;14\;{\mu}m$) and the MTF of 35.3%(Nyquist frequency: $35.7\;mm^{-1}$) at the center field. These resulting optical system performances prove that the breadboard AmonRa instrument, as built, satisfies the science requirements of the EARTHSHINE mission.

• The Bulletin of The Korean Astronomical Society
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• v.31 no.1
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• pp.20.2-20.2
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• 2006

• Bulletin of the Korean Space Science Society
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• 2006.04a
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• pp.38-38
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• 2006

• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.1149-1152
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• 1999

A gain controllable precision full-wave rectifier for the measurements of small-signal voltage is presented. It consists of gain controllable inverter superdiode and noninverter superdiode. The results of simulation with PSpice and experiment on breadboard show that the proposed rectifier has the characteristic of precise rectification and amplification for small signal voltage.

• Journal of Practical Engineering Education
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• v.7 no.2
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• pp.113-117
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• 2015

In this academic paper, we introduce a bread board simulation which is developed based on HTML language. this program is developed because actual electronic practices have some problems. Electronic circuit practice using bread board is widely practiced in colleges or high schools in South Korea, but actual electronic circuit practice needs lots of consumable stuff, and they are needed to be purchased and managed continuously. Besides, composing complicated electronic circuit restricts the efficiency of studying. Therefore, we propose breadboard simulation program which helps to resolve those problems.

• Journal of the Korean Institute of Telematics and Electronics
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• v.10 no.6
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• pp.62-71
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• 1973

ECAP(Electronic Circuit Analysis Program) is used for analysis of a gyrator network obtained by conventional approach. Thus obtained characteristics of the original network showed the necessity of some improvement. Modification of the network was made through DC Analysis of ECAP for improved behavior of gyrator. by the replacement of resistors in collector circuits with constant current source circuits, thus decreasing the required voltage of collector bias source voltage, and in turn, increasing collector resistances. The modified network was again analized through ECAP AC Analysis. The result justifies the modification of networks and tile utilization of a computer program for network analysis instead of a "breadboard" experiment.xperiment.

• Bulletin of the Korean Space Science Society
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• 2008.04a
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• pp.26.1-26.1
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• 2008

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.13 no.7
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• pp.557-563
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• 2001

Small capacity gas absorption systems for cooling and heating have been favorably considered to reduce the seasonal imbalance of electrical loads and LNG consumption recently. A multifunctional plate-fin heat exchanger was adopted as an absorber and the performance was tested and analyzed to reduce the size and weight of the absorption heat pump. The test was performed using breadboard type ammonia absorption machine. The performance was compared with the plate type absorber and there was little difference in heat and mass transfer characteristics. The heat and mass transfer performance was a function of poor solution and vapor flow rates and the mass transfer was dependent on vapor flow rate more than heat transfer.

• Journal of computational fluids engineering
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• v.11 no.2 s.33
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• pp.32-39
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• 2006

A heat dissipation modeling method of EEE parts is developed for thermal design and analysis of an satellite electronic equipment. The power consumption measurement value of each functional breadboard is used for the heat dissipation modeling method. For the purpose of conduction heat transfer modeling of EEE parts, surface heat model using very thin ignorable thermal plates is considered instead of conventional lumped capacity nodes. These modeling methods are applied to the thermal design and analysis of CTU EM and EQM and verified by thermal cycling and vacuum tests.