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Fan S.-K.S.,National Taipei University of Technology | Fan C.,Ming Chi University of Technology | Yang J.-H.,Ming Chi University of Technology | Yang J.-H.,Electronics Testing Center | Liu K.F.-R.,Ming Chi University of Technology
Journal of Cleaner Production | Year: 2013

This paper evaluates the recycling rates, costs as well as the disassembly time of a notebook at its end-of-life stage through Prodtect 1.3 calculation using data collected during disassembly processes. The results show that the disassembly and recycle of a notebook at its end-of-life stage may exert positive influence on the environment by introducing the eco-design concept to the product re-design, thus creating more resource-conserving products and enhancing recycle efficiency. Through proper disassembly and disposal processes, a notebook at its end-of-life stage may yield the recycling value of 1.61 EUR. Furthermore, the most revenue of 1.44 EUR is attributed to the recycle of metallic and plastic parts, the major constituents of a notebook. As for the time required for disassembly, the Top Case, Motherboard and LCD (CHI MEI) are the three most time-taking parts in the disassembly process, and their total times required are 133, 67 and 64 s, respectively. Prodtect calculation to assess notebook recycling benefits provides a new set of guidelines for the notebook designer to propose potential modifications of the re-design for reducing the environmental impacts arising from the next-generation products. © 2012 Elsevier Ltd. All rights reserved. Source


Tang Y.-C.,Bureau of Standards | Chen J.-S.,Bureau of Standards | Lee C.-H.,Electronics Testing Center | Chiu C.-N.,Da - Yeh University
IEEE International Symposium on Electromagnetic Compatibility | Year: 2014

In this paper, a case study on the merit of adding the LISN for radiated-emission (RE) testing is demonstrated. For this study, a site source is created and considered as the device under test. This site source, activated by AC power, can generate harmonic reference signals ranging from 30 MHz to 1 GHz. The site source is then measured for numerous times. A large variation among these measurements is observed. By adding several ferrite cores to the power cord of the site source, the variation can be highly reduced. This implies that the conducted noise onto the power cord may contribute a lot to the uncertainty, since the conducted noise will radiate differently as the impedance of the power system is varied. Therefore, it may conclude that the variation may also be reduced if the LISN is added between the site source and the power system even without using ferrite cores. As the conducted noise along the power cord is unavoidable, the LISN will provide a constant impedance making the noise radiated in the same manner. Based on many detailed measurements, the consistency of the RE testing for the site source is indeed enhanced by adding the LISN. © 2014 The Institute of Electronics, Information and Communication Engineer. Source


Wang B.-B.,National Kaohsiung University of Applied Sciences | Chang C.-F.,Electronics Testing Center | Yang W.-D.,National Kaohsiung University of Applied Sciences
International Journal of Minerals, Metallurgy and Materials | Year: 2013

γ-LiAlO2:Mn2+ phosphor was synthesized using the cellulose-citric acid sol-gel method, and its light emission and energy transfer properties were investigated. Excitation and emission spectrum analysis revealed a decrease in intensity of the spectrum as the amount of Mn 2+ doping increased. Blasse's equation determined the maximum distance for energy transfer between Mn2+ ions as 4.3142 nm. Dexter's theory verifies that the mechanism of energy transfer between Mn2+ ions conforms to an electric dipole and electric quadrupole interaction. © 2013 University of Science and Technology Beijing and Springer-Verlag Berlin Heidelberg. Source


Wang B.-B.,National Kaohsiung University of Applied Sciences | Chang C.-F.,Electronics Testing Center | Li Y.-R.,National Kaohsiung University of Applied Sciences | Chau T.N.,National Kaohsiung University of Applied Sciences | Yang W.-D.,National Kaohsiung University of Applied Sciences
Applied Mechanics and Materials | Year: 2012

This study successfully synthesized manganese-doped calcium zirconate phosphor and manganese-doped strontium zirconate phosphor using the sol-gel method. We employed X-ray powder diffraction and fluorescence spectroscopy to analyze the crystal structure and spectral characteristics of both phosphors. In X-ray powder diffraction analysis, data related to manganese-doped calcium zirconate phosphor and manganese-doped strontium zirconate phosphor were compared using X-ray diffraction comparison software to confirm the crystal structures of both phosphors. The crystal structure of manganese-doped calcium zirconate phosphor was in accordance with orthorhombic perovskites belonging to the Pnma{62} space group. The lattice parameters were a=5.762 Å, b=8.017 Å, and c=5.591 Å; c/a=0.97; volume=258.3 Å3, and density=4.611 g/cm3. The crystal structure of manganese-doped strontium zirconate phosphor conformed to orthorhombic perovskites belonging to the Pnma{62} space group, and the lattice parameters were a=5.818 Å, b=8.204 Å, c=5.797 Å; c/a=0.996; volume=276.7 Å3, and density=5.446 g/cm3. Fluorescence spectroscopy indicated that the primary broadband peak of manganese-doped calcium zirconate phosphor was located at 396.6 nm in the excitation spectrum corresponding to the 4T2(4G)→4T1( 4P) energy level transition. In the emission spectrum, the primary broadband peak was located at 596.6 nm, corresponding to the 4T2(4D)→4T2( 4G) energy level transition. For manganese-doped strontium zirconate phosphor, the primary broadband peak was located at 496.6 nm in the excitation spectrum and at 696.6 nm in the emission spectrum, corresponding to the 4T1(4G)→4T2( 4D) and 4E(4G)→4T1(4 G) energy level transitions, respectively. © (2012) Trans Tech Publications, Switzerland. Source


Hsieh C.-Y.,National Chiao Tung University | Lin B.-W.,National Chiao Tung University | Cho H.-J.,National Chiao Tung University | Wang B.-M.,National Chiao Tung University | And 2 more authors.
IEEE Photonics Technology Letters | Year: 2012

A relatively simple and easy and inexpensive liquid-phase deposition (LPD) method is employed to introduce nanoscale silica hemispheres on sapphire substrates for fabricating a nano-patterned sapphire substrate (NPSS). Compared with GaN grown on sapphire without any pattern, the NPSS-GaN film is of much better quality as observed by scanning electron microscopy, transmission electron-microscopy, X-ray diffraction, cathodoluminescence, and photoluminescence. This is because GaN is initiated from the c-plane instead of the LPD-silica surface. In addition, many dislocations within the NPSS-GaN bend toward the patterns, or end at the GaN/void interfaces. © 2012 IEEE. Source

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