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Xuan Hung NGUYEN(Xuan Hung NGUYEN ),Thuy Dương TRAN(Thuy Dương TRAN ),Phan Hoai Diem VU(Phan Hoai Diem VU ),Yen Chi DINH(Yen Chi DINH ),Thi Mai Huong DUONG(Thi Mai Huong DUONG ),Thi Ngoc Hien THAN(Thi 한국유통과학회 2022 The Journal of Asian Finance, Economics and Busine Vol.9 No.9
The goal of the study is to examine and assess how the factors of logistics service quality provided by logistics service providers influence customer loyalty and satisfaction in Vietnam. This study employs samples of the Kansei technique. The article’s data was gathered through an online survey of 388 distinct Vietnamese customers who used logistics services before and during the Covid-19 outbreak. After the data was obtained, it was evaluated using SmartPLS 3.0’s Cronbach’s Alpha test and structural equation model (SEM). Staff service quality, operational service quality, and technical service quality are the three factors that determine the quality of logistics services in the study. Out of the 10 proposed hypotheses, research findings show that five are acceptable. The Covid-19 Pandemic in Vietnam had a significant impact on all dimensions, but it had no effect on how satisfied customers were with the logistics service providers. Nevertheless, loyalty is considerably influenced by only one factor, which is customer satisfaction, and customer trust moderates the relationship between these two factors. As a consequence of that, several managerial implications have been proposed to help logistics service providers improve their services to attract and keep Vietnamese customers using their service in the long term.
Hang Ruan,Xuan Zhu,Zhen Zhang,Xin-fang Liang,Yan Fu,Mei-qin Su,Qi-lin Liu,Xiu-min Wang 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.8
dl-Praeruptorin A (Pd-Ia) is the major active constituent of the traditional Chinese medicine Peucedanum praeruptorum Dunn. Recently it has been identified as a novel agent in the treatment and prevention of cardiovascular diseases. Accordingly, we investigated the metabolism of Pd-Ia in rat liver microsomes. The involvement of cytochrome P450 (CYP) and CYP isoforms were identified using a CYP-specific inhibitor (SKF-525A), CYP-selective inhibitors (α-naphthoflavone, metyrapone, fluvastatin, quinidine, disulfiram, ketoconazole and ticlopidine) and CYP-selective inducers (phenobarbital, dexamethasone and β-naphthoflavone). Residual concentrations of the substrate and metabolites were determined by HPLC, and further identified by their mass spectra and chromatographic behavior. These experiments showed that CYP450 is involved in Pd-Ia metabolism, and that the major CYP isoform responsible is CYP3A1/2, which acts in a concentration-dependent manner. Four Pd-Ia metabolites (M1, M2, M3, and M4) were detected after incubation with rat liver microsomes. Hydroxylation was the primary metabolic pathway of Pd-Ia, and possible chemical structures of the metabolites were identified. Further research is now needed to link the metabolism of Pd-Ia to its drug-drug interactions.
Xuan-Hung Pham,함은일,Kim-Hung Huynh,김형모,Byung Sung Son,Dae Hong Jeong,Bong-Hyun Jun 한국공업화학회 2020 Journal of Industrial and Engineering Chemistry Vol.83 No.-
Toxic 4-aminophenol (4-AP) can be considered as a primary impurity during the synthesis and/or storageof N-acetyl-para-aminophenol (APAP). In this study, 4-AP was sensitively and selectively detected in thepresence of APAP using a gold–silver core–shell nanoparticle-embedded silica nanostructure(SiO2@Au@Ag). First, approximately 200 nm of SiO2@Au@Ag were successfully prepared based on theAu-seed (3 nm) mediated growth of Ag on the surface of SiO2 NP. Upon the incubation of 4-AP withSiO2@Au@Ag nanoparticles (NPs), the surface-enhanced Raman spectroscopy (SERS) intensity of 4-AP at1591 cm 1 increased proportionally in accordance with an increase in the concentration of 4-AP in therange of 0–800 mM, with a detection limit of 3.5 ppm. In addition, the APAP did not exhibit a significantRaman signal at high concentrations (5 mM) and under the NP incubation condition. In the presence of 1mM, 3 mM, and 5 mM of APAP, 4-AP was detected using SiO2@Au@Ag NPs within the range of 200–1000mM, although the slopes decreased from 0.083 cps/mM to 0.059 cps/mM, 0.068 cps/mM, and 0.035 cps/mM, respectively. This study provides a method for the detection of 4-AP in the presence of APAP by usingSiO2@Au@Ag for impurity detection in the pharmaceuticalfield.
Xuan Hung Mai,Sang-Kyu Kwak,Jee-Hoon Jung,Kim, Katherine A. Institute of Electrical and Electronics Engineers 2017 IEEE transactions on industrial electronics Vol.64 No.8
<P>This paper presents a dynamic, electricthermal model for a photovoltaic (PV) cell that combines electrical and thermal parameters to accurately emulate PV panels in real time for power-hardware-in-the-loop simulation (PHILS). In this model, the irradiance and ambient temperature are used to calculate the PV cell temperature based on a five-layer thermal model. The cell temperature is then used in the electrical model to accurately adjust the PV electrical characteristics. A custom experimental setup is built to test and verify the electrical and thermal characteristics of the PV cell model. This electric-thermal model is validated using experimental data in realistic scenarios. The model is also tested with PHILS using a real-time simulator and a programmable dc power supply to emulate PV power generation under various load changes. The model is well matched to the experimental measurements with an error within 2.4% for the electrical aspects and within 1.5% for the thermal aspects in the tested scenarios.</P>
Hung, Pham Tien,Hien, Vu Xuan,Hoat, Phung Dinh,Lee, Sangwook,Lee, Joon-Hyung,Kim, Jeong-Joo,Heo, Young-Woo Elsevier 2019 Scripta materialia Vol.172 No.-
<P><B>Abstract</B></P> <P>Herein we report on the growth of layered BiI<SUB>3</SUB> nanoplates materials and their sensing properties of NO<SUB>2</SUB> under violet light illumination. The BiI<SUB>3</SUB> nanoplates were grown on a glass substrate using a chemical vapor deposition (CVD) system, with an average thickness of 30 nm and the lateral dimension of 150–170 nm. Their photo-induced sensing response for 20 ppm NO<SUB>2</SUB> and the response/recovery time are approximately ~11.2% and 18/36 s, respectively. The limit of detection (LOD) of NO<SUB>2</SUB> for the BiI<SUB>3</SUB> sensor is 25 ppb. A possible light-induced gas-sensing mechanism was proposed and investigated for the BiI<SUB>3</SUB> nanoplate.</P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Proposal of Cross-platform Real-time Open Messaging System(ROMS) with Apache Cordova
Xuan-Qui Pham(팜소안쿠이),Pham Phuoc Hung(밤복홍),Ton Thi Kim Loan(톤띠김롼),Nguyen Dao Tan Tri(누엔다우탄틸리),Huu-Quoc Nguyen(누엔훠쿠크),Aymen Abdullah Alsaffar(아이만압둘라알사파르),Yunkon Kim(김윤곤),Eui-Nam Huh(허의남) 한국정보과학회 2015 한국정보과학회 학술발표논문집 Vol.2015 No.6
Experimental investigation of the vertical pullout cyclic response of bucket foundations in sand
Hung, Le Chi,Lee, Sihoon,Tran, Nghiem Xuan,Kim, Sung-Ryul Elsevier 2017 Applied ocean research Vol.68 No.-
<P><B>Abstract</B></P> <P>A series of 1g model tests was conducted to investigate the accumulated vertical pullout displacement and unloading stiffness of bucket foundations embedded in dry and saturated sands. The foundations were subjected to vertical pullout cyclic loading with different load amplitudes. Cyclic load was applied up to 10<SUP>4</SUP> cycles. Test results showed that the accumulated vertical pullout displacement increased with the increase in the number of load cycles and cyclic load amplitudes. The unloading stiffness of the bucket foundations decreased with the increase in load amplitude and number of cycles. Empirical equations were proposed based on the test results to evaluate the accumulated vertical pullout displacement and unloading stiffness of the bucket foundations in saturated sand. These equations can be used for the preliminary design of single or tripod bucket foundations.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Cyclic response of bucket foundations in saturated sand under cyclic vertical pullout load was examined by 1 <I>g</I> model tests. </LI> <LI> Accumulated displacement increased with the increase in number of load cycles and load magnitude. </LI> <LI> Unloading stiffness decreased with the increase in number of load cycles and load magnitude. </LI> <LI> Empirical equations have been proposed. </LI> </UL> </P>
A Cell-based Smoothed Finite Element Method for Three Dimensional Solid Structures
Hung Nguyen-Xuan,Hiep Vinh Nguyen,Stephane Bordas,Timon Rabczuk,Marc Duflot 대한토목학회 2012 KSCE JOURNAL OF CIVIL ENGINEERING Vol.16 No.7
This paper extends further the strain smoothing technique in finite elements to 8-noded hexahedral elements (CS-FEM-H8). The idea behind the present method is similar to the cell-based smoothed 4-noded quadrilateral finite elements (CS-FEM-Q4). In CSFEM,the smoothing domains are created based on elements, and each element can be further subdivided into 1 or several smoothing cells. It is observed that: 1) The CS-FEM using a single smoothing cell can produce higher stress accuracy, but insufficient rank and poor displacement accuracy; 2) The CS-FEM using several smoothing cells has proper rank, good displacement accuracy, but lower stress accuracy, especially for nearly incompressible and bending dominant problems. We therefore propose 1) an extension of strain smoothing to 8-noded hexahedral elements and 2) an alternative CS-FEM form, which associates the single smoothing cell issue with multi-smoothing cell one via a stabilization technique. Several numerical examples are provided to show the reliability and accuracy of the present formulation.