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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.
Yuan Zhang,Lufei Zhang,Sinan Lu,Yucheng Xiang,Cheng Zeng,Tianyu He,Yuan Ding,Weilin Wang 대한암학회 2021 Cancer Research and Treatment Vol.53 No.1
Purpose Intrahepatic cholangiocarcinoma (ICC) is one of the most common liver primary tumors but its treatments are limited. Bioinformatics showed that the expression level of long non-coding RNA cancer-associated susceptibility 15 gene (CASC15) is correlated with ICC progression, but its functional mechanism remains unclear. Materials and Methods Tissues from ICC patients, tumor and adjacent tissue, were used for detection of the expression of CASC15. Clinical data were also collected for clinicopathologic and survival analysis. Short interfering RNA and lentiviral short hairpin RNA were used to knock down CASC15 and PRDX2 expression in ICC cell lines, for the analysis of changes of cell function and xenografts. RNA-pulldown and RNA immunoprecipitation assays were used to detect RNA-binding protein, PRDX2. Male nude mice were used for ICC xenografts, and livers were collected after 4 weeks for immunohistochemistry. Results CASC15 is highly expressed in ICC tissues and is related to higher TNM stage. Knockdown of CASC15 in ICC cells reduced cell proliferation, migration, invasiveness and increased apoptosis, and G1/S block. PRDX2 bound to CASC15. Knockdown of CASC15 decreased PRDX2 expression which was rescued by the inhibition of proteasome formation. Downregulation of PRDX2 resulted in G1/S block, reduced ICC cell invasion. Downregulation of CASC15 inhibited phosphoinositide 3-kinase (PI3K)/AKT/c-Myc pathway through downregulating of PRDX2 and overexpressed PRDX2 rescued the block. CASC15 knockout in ICC xenografts suppressed tumor development in vivo, decreased the expression of PRDX2 and Ki67 and inhibited PI3K/AKT pathway. Conclusion CASC15 promotes ICC possibly by targeting PRDX2 via the PI3K/AKT pathway, indicating poor prognosis and high degree of malignancy of ICC.
Organic Thin-Film-Transistor Arrays for Active-Matrix Display on Flexible Substrate
Cheng-Chung Lee,Hsiang-Yuan Cheng,Jia-Chong Ho,Tarng-Shiang Hu 한국물리학회 2006 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.48 No.I
Differently from a traditional inorganic transistor, the organic thin-film transistor can be fabricated at low temperature, so we can choose a light, thin, and cheap plastic substrate to replace glass substrate. Here, an organic thin-film transistor (OTFT) has been formed on plastic substrate. An active-matrix back plate with 64 × 128 pixels has been fabricated to drive a TNLCD. We achieved a field-effect mobility of 0.03 cm2/V·s and on/off current ratio of about 105 for the pentacene OTFT on plastic substrate. Besides vacuum deposition, these properties offer potential methods to fabricate OTFT on flat panel displays, such as spin coating, ink-jet printing, and even a roll-to-roll process.
Field Weakening Control of a PM Electric Variable Transmission for HEV
Cheng, Yuan,Bouscayrol, Alain,Trigui, Rochdi,Espanet, Christophe,Cui, Shumei The Korean Institute of Electrical Engineers 2013 Journal of Electrical Engineering & Technology Vol.8 No.5
This paper presents the control of a Permanent Magnet Electric Variable Transmission (PM-EVT) for Hybrid Electric Vehicles (HEVs). Consisting of two electric machines, the EVT realizes the power split function in an electromagnetic way rather than in a mechanical way. A specific PM-EVT has been designed for Toyota Prius II. The control scheme of the entire vehicle is deduced using the Energetic Macroscopic Representation methodology. The energy management strategy yields local control references. A specific attention is paid for the field weakening for wide speed range. Simulation results are provided to illustrate the EVT modeling and control.
A Tracking System Using Location Prediction and Dynamic Threshold for Minimizing SMS Delivery
Yuan-Cheng Lai,Jian-Wei Lin,Yi-Hsuan Yeh,Ching-Neng Lai,Hui-Chuan Weng 한국통신학회 2013 Journal of communications and networks Vol.15 No.1
In this paper, a novel method called location-based delivery (LBD), which combines the short message service (SMS) and global position system (GPS), is proposed, and further, a realistic system for tracking a target’s movement is developed. LBD reduces the number of short message transmissions while maintaining the location tracking accuracy within the acceptable range. The proposed approach, LBD, consists of three primary features: Short message format, location prediction, and dynamic threshold. The defined short message format is proprietary. Location prediction is performed by using the current location, moving speed, and bearing of the target to predict its next location. When the distance between the predicted location and the actual location exceeds a certain threshold, the target transmits a short message to the tracker to update its current location. The threshold is dynamically adjusted to maintain the location tracking accuracy and the number of shortmessages on the basis of themoving speed of the target. The experimental results show that LBD, indeed, outperforms other methods because it satisfactorily maintains the location tracking accuracy with relatively fewer messages.
A multi-user Selective Undo/Redo Approach for Collaborative CAD Systems
Yuan Cheng,Fazhi He,Xiantao Cai,Yilin Chen (사)한국CDE학회 2013 한국CAD/CAM학회 국제학술발표 논문집 Vol.2010 No.8
The engineering design process is a creative process and the designers must apply Undo/Redo to modify the CAD model repeatedly to explore new solutions. Undo/Redo has become one of most important facilities in interactive graphics/CAD systems. Undo/Redo in collaborative CAD system is also very helpful for collaborative awareness among a group of cooperative designers to eliminate misunderstanding and recover from design error. However, Undo/Redo in collaborative CAD is much more difficult than that in single-user CAD. For an example, a single erroneous operation can be propagated to several remote sites since the concurrency of CAD operations. This paper presents a multi-user Undo/Redo approach to maintain operation intention and collaborative awareness in full distributed collaborative CAD systems. The paper proposes the composition of 3D designing artifacts and adopts a tree-like structure for representing the combination of features/sub-configurations and the dependency relationship among modeling operations. Based on the feature combination hierarchy, a multi-user selective Undo/Redo approach for full replicated collaborative CAD systems is studded. The proposed method uses site identification and state-vector to track the undo operations. Intention preservation and consistency maintenance are both promised with our method.
A double integral characterization of a Bergman type space and its M\"obius invariant subspace
Cheng Yuan,Hong-Gang Zeng 대한수학회 2019 대한수학회보 Vol.56 No.6
This paper shows that if $1<p<\infty$, $\alpha\ge-n-2$, $\alpha>-1-\frac{p}{2} $ and $f$ is holomorphic on the unit ball $\bbn$, then $$\ibn |Rf(z)|^p(1-|z|^2)^{p+\alpha} \rd v_\alpha(z)<\infty$$ if and only if $$\ibn\ibn\frac{|f(z)-f(w)|^p}{|1-\langle z,w\rangle|^{n+1+s+t-\alpha}} (1-|w|^2)^s(1-|z|^2)^t \rd v(z)\rd v(w)<\infty,$$ where $s,t>-1$ with $\min(s,t)>\alpha $.
Yuan Cheng,Xingchen Li,Yibo Dai,Yangyang Dong,Xiao Yang,Jianliu Wang 대한부인종양학회 2021 Journal of Gynecologic Oncology Vol.32 No.3
Objective: Aimed to construct an immune-related risk signature and nomogram predictingendometrial cancer (EC) prognosis. Methods: An immune-related risk signature in EC was constructed using the least absoluteshrinkage and selection operator regression analysis based on The Cancer Genome Atlas(TCGA) and Gene Expression Omnibus (GEO) databases. A nomogram integrating theimmune-related genes and the clinicopathological characteristics was established andvalidated using the Kaplan-Meier survival curve and receiver operating characteristic (ROC)curve to predict the overall survival (OS) of EC patients. The Estimation of STromal andImmune cells in MAlignant Tumor tissues using Expression data (ESTIMATE) R tool wasused to explore the immune and stromal scores. Results: CCL17, CTLA4, GPI, HDGF, HFE2, ICOS, IFNG, IL21R, KAL1, NR3C1, S100A2, andS100A9 were used in developing an immune-related risk signature evaluation model. TheKaplan-Meier curve indicated that patients in the low-risk group had better OS (p<0.001). The area under the ROC curve (AUC) values of this model were 0.737, 0.764, and 0.782 for the3-, 5-, and 7-year OS, respectively. A nomogram integrating the immune-related risk modeland clinical features could accurately predict the OS (AUC=0.772, 0.786, and 0.817 at 3-, 5-,and 7-year OS, respectively). The 4 immune cell scores were lower in the high-risk group. Forkhead box P3 (FOXP3) and basic leucine zipper ATF-like transcription factor (BATF)showed a potential significant role in the immune-related risk signature. Conclusion: Twelve immune-related genes signature and nomogram for assessing the OS ofpatients with EC had a good practical value.