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EVOLUTION OF THE TIMES WHEN THE TRADITIONAL MATERIALS ENCOUNTER INTERACTIVE TECHNOLOGY
Chen-Wei Chiang,Min-Shiue Wu,Meng-Te Hsieh,Chia-Yu Kao,Chun-Yan Liu 한국디자인학회 2015 한국디자인학회 학술발표대회 논문집 Vol.2015 No.10
The Reflection of Bamboo combines traditional materials with interactive technology, analyzing what the characteristics of the old and new materials are, as well as how to apply technology to the integration of these materials. Through this installation, we reconsider the possibility of integrating traditional materials with modern technology. Adopting bamboo as the main material, this installation raises the spirit of traditional techniques in a unique way and employs bamboo’s special tenacity. Viewers can interact with this installation and experience the strength, esthetics and variation in the demonstrated shadow.
( J. C. Kim ),( Patricia Seitz ),( Li-shiue Gau ),( Kyoung Tae Kim ),( Eunkyun Park ) 한국체육학회 2020 International journal of human movement science Vol.14 No.2
This qualitative study is to explore the meaning of having a female coach for a male team. Along with various secondary data, first-hand experiences of hiring managers who have previously hired female coaches for male teams were used. Four male athletic directors from high schools located in the U.S. Northeast region were interviewed, and a cross-case analysis method was adopted for tagging data and determining themes. Four primary themes emerged: 1) Prior experiences with a female coach when being an athlete or a coach influence the perceived meaning of seeing a female coach for a male team; 2) It was emphasized to hire the most qualified candidate for the job, with gender not being a crucial criteria in the hiring process; 3) Organizational work environment existed hidden obstacles that a female coach for a male team would face; and 4) Nevertheless, females were encouraged to apply for coaching positions on male teams if they met the qualifications. Regardless of gender, the most desirable candidates possessing professional qualifications and knowledge should be hired. This study concluded that the trend for a low percentage of female applicants for male teams needs to be improved and thus to enhance gender diversity.
Ultrafast Graphene Light Emitters
Kim, Young Duck,Gao, Yuanda,Shiue, Ren-Jye,Wang, Lei,Aslan, Ozgur Burak,Bae, Myung-Ho,Kim, Hyungsik,Seo, Dongjea,Choi, Heon-Jin,Kim, Suk Hyun,Nemilentsau, Andrei,Low, Tony,Tan, Cheng,Efetov, Dmitri K. American Chemical Society 2018 Nano letters Vol.18 No.2
<P>Ultrafast electrically driven nanoscale light sources are critical components in nanophotonics. Compound semiconductor-based light sources for the nanophotonic platforms have been extensively investigated over the past decades. However, monolithic ultrafast light sources with a small footprint remain a challenge. Here, we demonstrate electrically driven ultrafast graphene light emitters that achieve light pulse generation with up to 10 GHz bandwidth across a broad spectral range from the visible to the near-infrared. The fast response results from ultrafast charge-carrier dynamics in graphene and weak electron-acoustic phonon-mediated coupling between the electronic and, lattice degrees of freedom. We also find that encapsulating graphene with hexagonal boron nitride (hBN) layers strongly modifies the emission spectrum by changing the local optical density of states, thus providing up to 460% enhancement compared to the gray-body thermal radiation for a broad peak centered at 720 run. Furthermore, the hBN encapsulation layers permit stable and bright visible thermal radiation with electronic temperatures up to 2000 K under ambient conditions as well as efficient ultrafast electronic cooling via near-field coupling to hybrid polaritonic modes under electrical excitation. These high-speed graphene light emitters provide a promising path for on-chip light sources for optical communications and other optoelectronic applications.</P>
Laser brazing molybdenum using two titanium base fillers
Lin, Chia-Chen,Lee, Cheng-Han,Shiue, Ren-Kae,Shy, Hsiou-Jeng Techno-Press 2012 Advances in materials research Vol.1 No.3
Brazing Mo using Ti and Ti-15-3 foils has been investigated in the experiment. For traditional furnace brazing, solidification shrinkage voids cannot be completely removed from the joint even the brazing temperature increased to 2013 K and 160 ${\mu}m$ thick Ti foil applied in brazing. Similar results are observed from the joint using Ti-15-3 filler. In contrast, the quality of laser brazed joint is much better than that of furnace brazed joint. A sound joint is achieved after laser brazing. Tensile strengths of 418 and 373 MPa are obtained from laser brazed joints at the power of 800W and travel speed of 5 mm/s using Ti and Ti-15-3 fillers, respectively. All laser brazed joints are fractured at the brazed zone and cleavage dominated fractures are widely observed from their fractographs. The Ti base fillers show potential in laser brazing Mo substrate.
Research on An Interleaved Phase-Shift Half-Bridge LLC Resonant Converter
Shu-Po Wang,Min-Rui Hong,Ping-Tsang Wu,Ching-Chun Chuang,Shiue-Der Lu 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-
This paper presents the analysis and simulation for a novel high-power density electric vehicle dc-dc converter. In this paper, a novel interleaved phase-shift half-bridge converter that mainly comprises two modules of a half-bridge converter and a double full-bridge rectifier is proposed. In the case of interfacing the high-voltage battery module, the isolated DC/DC converter is used to control the voltage at the input of the battery according to the battery terminal voltage and optimize the efficiency of the dc-dc converter in a wider range of operating voltage. It operates as a voltage doubler to achieve an output voltage of 450V for the charging of a high-voltage battery. The isolated dc-dc converter is operated as an LLC resonant converter owing to its advantages of simple control and soft switching operation. This converter not only has a wide range of zero-voltage- switching (ZVS) turn-on of power switches on the primary side of the transformer but also has a zero-current-switching (ZCS) turn-off of rectifier diode on the secondary side of the transformer. The proposed converter can achieve the output voltage range of 250-450V by adapting the phase shift between the two square waves. The two LLC half-bridge resonant converters are connected in parallel, and it’s operated at a fixed frequency and constant duty cycle. The simplified control strategy in the proposed converter can be achieved since the switching frequency of the converter operates at the resonant point. Finally, a 3.4kW design prototype with 400V input voltage and the 250-450V output voltage is simulated to verify the effectiveness of the phase-shift mode control method.
Cho, Whirang,Wu, Jinghang,Shim, Bong Sup,Kuan, Wei-Fan,Mastroianni, Sarah E.,Young, Wen-Shiue,Kuo, Chin-Chen,Epps, III, Thomas H.,Martin, David C. The Royal Society of Chemistry 2015 Physical chemistry chemical physics Vol.17 No.7
<P>We describe the synthesis and characterization of bicontinuous cubic poly(3,4-ethylenedioxythiophene) (PEDOT) conducting polymer gels prepared within lyotropic cubic poly(oxyethylene)<SUB>10</SUB> nonylphenol ether (NP-10) templates with <I>Ia</I>3&cmb.macr;<I>d</I> (gyroid, GYR) symmetry. The chemical polymerization of EDOT monomer in the hydrophobic channels of the NP-10 GYR phase was initiated by AgNO<SUB>3</SUB>, a mild oxidant that is activated when exposed to ultraviolet (UV) radiation. The morphology and physical properties of the resulting PEDOT gels were examined as a function of temperature and frequency using optical and electron microscopy, small-angle X-ray scattering (SAXS), dynamic mechanical spectroscopy, and electrochemical impedance spectroscopy (EIS). Microscopy and SAXS results showed that the PEDOT gels remained ordered and stable after the UV-initiated chemical polymerization, confirming the successful templated-synthesis of PEDOT in bicontinuous GYR nanostructures. In comparison to unpolymerized 3,4-ethylenedioxythiophene (EDOT) gel phases, the PEDOT structures had a higher storage modulus, presumably due to the formation of semi-rigid PEDOT-rich nanochannels. Additionally, the storage modulus (<I>G</I>′) for PEDOT gels decreased only modestly with increasing temperature, from ∼1.2 × 10<SUP>5</SUP> Pa (10 °C) to ∼7 × 10<SUP>4</SUP> Pa (40 °C), whereas <I>G</I>′ for the NP-10 and EDOT gels decreased dramatically, from ∼5.0 × 10<SUP>4</SUP> Pa (10 °C) to ∼1.5 × 10<SUP>2</SUP> Pa (40 °C). EIS revealed that the impedance of the PEDOT gels was smaller than the impedance of EDOT gels at both high frequencies (PEDOT ∼10<SUP>2</SUP>Ω and EDOT 2–3 × 10<SUP>4</SUP>Ω at 10<SUP>5</SUP> Hz) and low frequencies (PEDOT 10<SUP>3</SUP>–10<SUP>5</SUP>Ω and EDOT ∼5 × 10<SUP>5</SUP>Ω at 10<SUP>−1</SUP> Hz). These results indicated that PEDOT gels were highly ordered, mechanically stable and electrically conductive, and thus should be of interest for applications for which such properties are important, including low impedance and compliant coatings for biomedical electrodes.</P> <P>Graphic Abstract</P><P>The successful templated-synthesis of PEDOT in bicontinuous GYR nanostructures: highly ordered, mechanically stable and electrically conductive. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c4cp04426f'> </P>