Strengthening the Link Between Organizational Culture and Employee Loyalty: Exploring the Mediating Effects of Employee Trust and Job Satisfaction

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.

Predicting strength development of RMSM using ultrasonic pulse velocity and artificial neural network

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.

Synthesis of Indium Oxide Nanocrystals Capped by Benzoic Acid via Ligand Exchange Process

Hien-Thu Pham,Ye-Seul Kim,Hyun-Dam Jeong 한국진공학회 2015 한국진공학회 학술발표회초록집 Vol.2015 No.2

탄화규소 세라믹 멤브레인을 적용한 혐기성 MBR 기술

Hien Thi Nguyen,박찬혁 한국막학회 2017 한국막학회 총회 및 학술발표회 Vol.2017 No.11

탄화규소(Silicon Carbide, SiC) 세라믹 멤브레인은 알루미나 원료의 세라믹 멤브레인보다 높은 친수성을 나타내어 동일한 압력 하에 높은 수투과도 유지가 가 능하다. 이러한 탄화규소 세라믹 멤브레인을 혐기성 생물막 반응조(Anaerobic Membrane Bioreactor, AnMBR)에 설치하여 고농도의 생물반응조 운전에도 불구하고 낮고 안정된 운전압력을 유지할 수 있었으며, 막오염 현상의 획기적인 저감이 가능하였다. 본 연구에서는 도시하수와 음폐수를 혼합 처리함에 있어서 탄화규소 세라믹 멤브레인을 적용한 AnMBR의 운전결과를 알루미나 세라믹 멤브레인을 적용한 경우와 비교 평가하였다.

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.

Synthesis and Characterization of Nitrogen-doped Activated Carbon by Using Melamine

Hien Ngoc Thi Le,정혜경 한국물리학회 2015 새물리 Vol.65 No.1

A simple method to synthesize nitrogen-doped activated carbon by using simple thermal treatment of a mixture of activated carbon and melamine was introduced. About 6 at% of nitrogen were successfully doped into the activated carbon, and it affected the electrochemical properties dramatically. The nitrogen-containing groups could be intercalated and diffused into the pores of the activated carbon and blocked them, resulting in decreased surface area and volume. However, the cyclic voltammetric current density was significantly increased in the nitrogen-doped activated carbon compared to the bare activated carbon, demonstrating the positive effect of nitrogen doping on the performance of supercapacitors and energy storage devices.

Molecular mechanism of suppression of MDR1 by puerarin from Pueraria lobata via NF-κB pathway and cAMP-responsive element transcriptional activity-dependent up-regulation of AMP-activated protein kinase in breast cancer MCF-7/adr cells

Hien, Tran Thi,Kim, Hyung Gyun,Han, Eun Hee,Kang, Keon Wook,Jeong, Hye Gwang WILEY-VCH Verlag 2010 Molecular Nutrition & Food Research (Print) Vol.54 No.7

<P>Multidrug resistance (MDR) is a major obstacle in cancer chemotherapy and its inhibition is an effective way to reverse cancer drug resistance. In the present study, we investigated that puerarin, a natural isoflavonoid from Pueraria lobata, down-regulated MDR1 expression in MCF-7/adriamycin (MCF-7/adr), a human breast MDR cancer cell line. Puerarin treatment significantly inhibited MDR1 expression, MDR1 mRNA and MDR1 promoter activity in MCF-7/adr cells. The suppression of MDR1 was accompanied by partial recovery of intracellular drug accumulation, leading to increased toxicity of adriamycin and fluorescence of rhodamine 123, indicating that puerarin reversed the MDR phenotype by inhibiting the drug efflux function of MDR1. Moreover, nuclear factor κ-B activity and IκB degradation were inhibited by puerarin. Puerarin stimulated AMP-activated protein kinase (AMPK), acetyl-CoA carboxylase and glycogen synthase kinase-3β phosphorylation, but puerarin decreased cAMP-responsive element-binding protein phosphorylation. The puerarin-induced suppression of MDR1 expression was reduced by AMPK inhibitor (compound C). Furthermore, both MDR1 protein expression and the transcriptional activity of cAMP-responsive element (CRE) were inhibited by puerarin and protein kinase A/CRE inhibitor (H89). Taken together, our results suggested that puerarin down-regulated MDR1 expression via nuclear factor κ-B and CRE transcriptional activity-dependent up-regulation of AMPK in MCF-7/adr cells.</P>

Sn Doping into Hematite Nanorods for High-Performance Photoelectrochemical Water Splitting

Hien, Truong Thi,Quang, Nguyen Duc,Hung, Nguyen Manh,Yang, Haneul,Chinh, Nguyen Duc,Hong, Soonhyun,Hieu, Nguyen Minh,Majumder, Sutripto,Kim, Chunjoong,Kim, Dojin The Electrochemical Society 2019 Journal of the Electrochemical Society Vol.166 No.15

<P>Photoelectrochemical water splitting is of great attention due to its environmental friendly generation of clean fuels. Hematite (α-Fe<SUB>2</SUB>O<SUB>3</SUB>) is considered one of the promising candidates due to its intrinsic properties for the high performance photoelectrochemical electrode such as favourable bandgap (2.0–2.2 eV), a suitable energy band position, non-toxicity, low cost, and excellent chemical stability. Herein, we report about Sn-doped hematite nanorods and their implementation as photoanodes for photoelectrochemical water splitting. We provide the simple but efficient route to incorporate the Sn into the hematite without structural damage in the nanostructure and scrutinize the effect of Sn dopant on the photoelectrochemical activity of the hematite. By the two-step heat-treatment process, Sn can be successfully incorporated into the hematite, which reveals the enhanced photoelectrochemical responses compared with undoped hematite. We elaborate the effect of Sn dopant in the hematite on the photoelectrochemical activities, thereby the optimum concentration of Sn dopant can be suggested. In addition, the catalyst layer of the cobalt phosphate is introduced to further increase the photoelectrochemical performance of Sn-doped hematite nanorods.</P>

Hierarchical porous framework of ultrasmall PtPd alloy-integrated graphene as active and stable catalyst for ethanol oxidation

Hien, Hoa Van,Thanh, Tran Duy,Chuong, Nguyen Dinh,Hui, David,Kim, Nam Hoon,Lee, Joong Hee Elsevier 2018 Composites. Part B, Engineering Vol.143 No.-

<P><B>Abstract</B></P> <P>In this study, a novel hierarchical porous network of Pt<SUB>51</SUB>Pd<SUB>49</SUB> alloy-integrated graphene nanosheet as active catalyst towards ethanol oxidation was fabricated using electroless deposition followed by chemical vapour deposition for the first time. Such materials were obtained as a three-dimensional continuous and non-order porous architecture with good dispersion and uniformity of the ultrasmall Pt<SUB>51</SUB>Pd<SUB>49</SUB> nanoalloy particles (∼3 nm) within the graphene nanosheets. As an electrocatalyst, it exhibited excellent catalytic behaviour towards ethanol oxidation with superior conversion, long-term stability and better tolerance towards intermediate's poisoning effect, as compared to commercial Pt black product. The results were associated with the enhanced electroactive surface area and mass transfer possibility of the catalyst due to the formation of an unique porous nanostructure for Pt<SUB>51</SUB>Pd<SUB>49</SUB> alloys. In addition, the coating effect of graphene nanosheets over Pt<SUB>51</SUB>Pd<SUB>49</SUB> alloy nanoparticles avoided aggregation and dissolution, possibly allowing full utilization of the active sites from all nanoparticles, and thus efficiently improving charge transfer ability and working stability of the catalyst. Owning high quality, good electrochemical performance, and ease of synthesis, the as-synthesized catalyst opens an interesting nanoarchitecture class for efficiently catalyzing ethanol oxidation in fuel cells.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>

Exceptional case of Kasha's rule: Emission from higher-lying singlet electron excited states into ground states in coumarin-based biothiol sensing

Hien, Nguyen Khoa,Nhan, Doan Thanh,Kim, Won Young,Van Bay, Mai,Nam, Pham Cam,Van, Dang Ung,Lim, In-Taek,Kim, Jong Seung,Quang, Duong Tuan Elsevier 2018 Dyes and pigments Vol.152 No.-

<P><B>Abstract</B></P> <P>A coumarin-based fluorescent sensor (7-Acryloxy-4-methylcoumarin, <B>AMC</B>) for biothiols has been studied by a combination of quantum chemical calculation and experimental investigation. The <B>AMC</B> selectively reacts with mercapto biomolecules via Michael addition, which can be served as a ratiometric fluorescent sensor for thiol-containing biomolecules. The <B>AMC</B> sensor shows a selectivity towards biothiols with sensitivity in the order of cysteine > glutathione > homocysteine. Moreover, the <B>AMC</B> sensor can detect the cysteine concentration within the intracellular level. The results of the theoretical investigations on the electron excited states show that the lack of overlapping between MOs in transitions of the lower-lying singlet electron excited states and the small energy gap between electron excited states are the cause of fluorescence from the higher-lying singlet electron excited states, as an exception from Kasha's rule. The fluorescence from the higher-lying singlet electron excited states leads to marked fluorescence enhancement at long wavelength in the products of addition reaction of biothiols to <B>AMC</B> sensor.</P> <P><B>Highlights</B></P> <P> <UL> <LI> A coumarin-derived ratiometric fluorescent sensor for the determination of biothiols via Michael addition was synthesized. </LI> <LI> Absorption and fluorescence characteristics were clarified on the basis of electronically excited states optimized geometries. </LI> <LI> The lack of overlap between MOs, and the small energy gap between electronically excited states lead to an exception of Kasha's rule. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>