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Does the Fit of Managerial Ability with Firm Strategy Matters on Firm Performance
CHENG, Teng Yuan,LI, Yue-Qi,LIN, Yu-En,CHIH, Hsiang-Hsuan Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.4
The study aims to answer why the previous studies find the positive or insignificant effect of the CEO's abilities on firm performance. Using 34,285 CEO-firm-year panel data from the U.S. publicly traded firms drawn from the BoardEx and EXECUXOMP database during from 1992 to 2014, the results show that the fit of the CEO's generality or specialist ability with firm strategy matters on firm performance and risk. This study computes a discrete STRATEGY composite measure to construct firm strategy types, such as Prospect or Defend and use CEOs' résumés to construct an index of general skills that are transferable across firms and industries. The results find that generalist CEOs are more suitable for prospectors than specialist CEOs. Firm performance is much better when specialist CEOs work for Defenders. Although the firm performance is better too for the generalist CEOs who fit for the Prospect strategy, the firm's risk is up too. The result suggests that firms need to consider their chosen business strategy to recruit and select CEOs Our findings provide direct evidence that the match between CEO's ability and the firm's strategy is crucial to firm performance and risk.
Analysis and Comparison of EE-type and CC-type Cores for Wireless Power Transfer Systems
Chung-Chuan Hou,Yu-Hsiang Teng,Wen-Pin Chang,Kuei-Yuan Chang 전력전자학회 2015 ICPE(ISPE)논문집 Vol.2015 No.6
This study presents a wireless power transfer (WPT) system based on EE-type and CC-type ferrite cores. The push-pull converter is utilized to transfer the power to the secondary side load with a parallel resonant capacitor. The issues of the WPT such as efficiency and air gap are discussed. The analysis and comparison of the EE-type and CC-type cores based on test results is discussed.
Composite electrolyte pastes for preparing sub-module dye sensitized solar cells
Shanmuganathan Venkatesan,Yun-Yu Chen,Chung-Yu Chien,Ming-Hsiang Tsai,Hsisheng Teng,Yuh-Lang Lee 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.107 No.-
In this study, high-efficiency sub-module quasi-solid-state (QS) dye-sensitized solar cells (DSSCs) are preparedusing silicon dioxide (SiO2) nanofiller and polyethylene oxide (PEO)-based iodide composite electrolytepastes. The influence of various amounts of nanofiller on the ionic conductivity, ion diffusioncoefficient, and the performance of the devices are explored. The addition of SiO2 decreases the ion transportproperties in the plain polymer electrolyte pastes. X-ray photoelectron spectroscopy analysis confirmsthe adsorption of polyiodide and lithium ions on the surface of the SiO2. This effect causes areduction in the concentration of ions near the photoelectrode. As a result, the QS-DSSCs using 1 wt.%SiO2 nanofillers have higher recombination resistance and a longer electron lifetime than the otherDSSCs. Therefore, high open-circuit voltage (0.794 V) and high efficiency (8.83%) are obtained for the correspondingQS-DSSCs. This efficiency is much better than the efficiencies of the devices employing thepristine polymer electrolyte paste and liquid electrolytes. This composite electrolyte paste is employedto prepare QS-sub-module cells. The four strip and rectangular-shaped module cells have high efficienciesof 4.71% and 4.81%, respectively. QS-DSSCs using 1 wt.% SiO2 nanofillers show high stability at bothroom temperature and 60 C.
Study on Rotating Compression Forming of Double-layer Clad Ring Considering Coulomb Friction
Gow-Yi Tzou,Yeong-Maw Hwang,Hsiang-Yu Teng 한국정밀공학회 2014 International Journal of Precision Engineering and Vol.1 No.3
This study uses two FEM simulations based on deform 3D and superform commercial software assuming coulomb friction to explore the plastic behavior in rotating compression forming of double-layer bounded clad ring. The rotating compression forming can reduce the compressive force and make the deformation uniform. Effects of the frictional coefficient, shear yield stress ratio, rotating angular velocity, frictional coefficient ratio, clad ring height ratio etc on compression characteristics including the effective stress, the effective strain, the velocity field, the shear strain, the compressive force etc. are investigated effectively. Moreover, the realistic rotating compression experiments of clad ring have been carried out to verify the acceptance of both FEM simulation models.