Volume 22 Issue 7 - July 6, 2012 PDF
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Research Express@NCKU Jul. 6 ~ Jul. 19, 2012

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Tetrachromatic hybrid white light-emitting diodes and the energy transfer between conjugated polymers and CdSe/ZnS quantum dots
Yan-Kuin Su

We have demonstrated the fabrication and characterization of high efficacy tetrachromatic white light-emitting diodes (LEDs) based on polymer and colloidal quantum dots. With a certain amount of green-emitting 2,3-dibutoxy-1,4-poly(phenylene vinylene) (DBPPV) and red-emitting CdSe/ZnS QD composite attached on an InGaN blue chip, stable and pure white light with CIE-1931 chromaticity coordinates …

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A 6 : 1 Unequal Wilkinson Power Divider with EBG CPW
Yeong-Her Wang

Power dividers are widely used in various microwave communications and high frequency applications. The standard 2-way Wilkinson divider has the equal power dividing ratio. However, if N>2 in 1:N unequal dividing ratio, a microstrip line having very high characteristic impedance is required. For instance, the 6:1 power divider requires a 207 Ω microstrip line, which is difficult to realize due to …

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Natural ventilation design mixes in elementary school classrooms
Che-ming Chiang

In Taiwan, electricity usage by buildings accounts for 27% of the total national electricity consumption, second only to industrial use. The electricity consumption of various buildings can be classified into three sectors: lighting, air conditioning, and dynamic power.  Therefore, more emphasis should be placed on saving electricity by reducing the electricity consumption of air conditioning. …

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Spindle Position Regulation for Wind Power Generators
Nan-Chyuan Tsai

Due to limited petroleum storage underground, the problem of energy crisis is getting more and more serious so that the development of new energy or new energy storage methods becomes urgent and significant.  However, the current commercial Wind Power Generator (WPG) is entirely shut down if the wind velocity is above the rated speed which is, in general, pretty low because any potential …

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