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Pham Hoang Hien(Pham Hoang Hien ),Tran Thanh Tuan(Tran Thanh Tuan ) People&Global Business Association 2023 Global Business and Finance Review Vol.28 No.3
Purpose: This research investigates the role of employee trust and job satisfaction in the relationship between organizational culture and employee loyalty. Design/methodology/approach: The study was conducted among 355 healthcare professionals working in a private healthcare system in southern cities of Vietnam, including doctors, nurses, and other medical staff. The research method employed was partial least squared structure equation modeling (PLS-SEM) with SmartPLS software for data analysis. Findings: The findings indicate that organizational culture has a direct positive impact on employee loyalty and also affects employee trust and job satisfaction positively. Furthermore, employee trust and job satisfaction act as intermediaries and positively influence employee loyalty toward the organization. Research limitations/implications: The research acknowledges the limitation of the limited sample size and encourages further exploration of these relationships in other contexts. In addition, this study provides valuable insights for the management board of private healthcare organizations in southern cities of Vietnam on how to improve employee loyalty by cultivating a positive organizational culture, promoting employee trust, and enhancing job satisfaction. Originality/value: Overall, this research contributes significantly to the existing literature by examining the interplay between employee trust, organizational culture, job satisfaction, and employee loyalty.
Hien D. Le,Jeng L. Huang,Hien D. Le 사단법인 한국계산역학회 2013 Computers and Concrete, An International Journal Vol.12 No.6
Ready-mixed soil material, known as a kind of controlled low-strength material, is a new way of soil cement combination. It can be used as backfill materials. In this paper, artificial neural network and non-linear regression approach were applied to predict the compressive strength of ready-mixed soil material containing Portland cement, slag, sand, and soil in mixture. The data used for analyzing were obtained from our testing program. In the experiment, we carried out a mix design with three proportions of sand to soil (e.g., 6:4, 5:5, and 4:6). In addition, blast furnace slag partially replaced cement to improve workability, whereas the water-to-binder ratio was fixed. Testing was conducted on samples to estimate its engineering properties as per ASTM such as flowability, strength, and pulse velocity. Based on testing data, the empirical pulse velocity–strength correlation was established by regression method. Next, three topologies of neural network were developed to predict the strength, namely ANN-I, ANN-II, and ANN-III. The first two models are back-propagation feed-forward networks, and the other one is radial basis neural network. The results show that the compressive strength of ready-mixed soil material can be well-predicted from neural networks. Among all currently proposed neural network models, the ANN-I gives the best prediction because it is closest to the actual strength. Moreover, considering combination of pulse velocity and other factors, viz. curing time, and material contents in mixture, the proposed neural networks offer better evaluation than interpolated from pulse velocity only.
Hien Duy Mai,Suncheol Kim,Hyojong Yoo 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.82 No.-
Oxygen evolution reaction (OER) is considered a major challenge in the production of efficientelectrochemical water splitting devices. To overcome the challenge, the development of inexpensiveelectrochemical catalysts with high energy conversion efficiencies is vital. Nanohybrids composed ofnoble metal nanoparticles and transition metal hydroxides often possess catalytically active sites that arebeneficial for OER performance. In this study, we report a successful synthesis of Ni(OH)2 nanoflowerswith a high degree of crystallinity and uniformity. The as-prepared Ni(OH)2 nanoflowers are employed astemplates for effective and controllable loading of Au nanodots to obtain Ni(OH)2@Au nanohybrids. Anexamination of the OER activity reveals that Ni(OH)2@Au nanohybrids exhibit a considerably loweroverpotential (h) value (390 mV) at a current density of 5 mA cm–2 and a smaller Tafel slope (120 mV dec–1) than those of Ni(OH)2 nanoflowers (540 mV and 324 mV dec–1, respectively). The OER enhancementeffect is mainly attributed to the decoration of Au nanodots, inducing charge transfer from Ni to Au andthereby stabilizing the Ni species at high oxidation levels. Moreover, the uniform loading of Au nanodotson the anisotropic Ni(OH)2 nanoflowers provides more active interfacial surfaces, which are expedient toOER.
Hien, Ta Duy,Noh, Hyuk-Chun Elsevier 2017 Computer methods in applied mechanics and engineer Vol.318 No.-
<P><B>Abstract</B></P> <P>The paper is to develop stochastic isogeometric analysis for the free vibration of functionally graded plates with spatially varying random material properties. The isogeometric analysis method is employed in the new stochastic analysis scheme which is called Stochastic IsoGeometric Analysis (SIGA). The elastic modulus and mass density are modeled as homogeneous Gaussian random fields along the plane of structure. The governing equation of stochastic isogeometric analysis for free vibration of functionally graded plates is derived in conjunction with perturbation expansions to predict the first and second moments of eigenvalues. In order to verify proposed method, the brute force Monte Carlo simulation is employed. The mean, variance, and COV (Coefficient of Variation) predicted by SIGA and those predicted by Monte Carlo simulation show good agreement. The numerical examples demonstrate that the randomness of material properties affects significantly the structural responses of the functionally graded plates. The correlation between elastic modulus and mass density is also observed to have significant effect on the response COV of eigenvalue.</P>
Katok-Hasselblatt-kinematic expansive flows
Hien Minh Huynh 대한수학회 2022 대한수학회지 Vol.59 No.1
In this paper we introduce a new notion of expansive flows, which is the combination of expansivity in the sense of Katok and Hasselblatt and kinematic expansivity, named KH-kinematic expansivity. We present new properties of several variations of expansivity. A new hierarchy of expansive flows is given.