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Ngoc Dan Thanh NGUYEN(Ngoc Dan Thanh NGUYEN ),Trong Phuc NGO(Trong Phuc NGO ),Ngoc Van MAI(Ngoc Van MAI ),Kim Ngan TRA(Kim Ngan TRA ),Tran Huy Hoang LE(Tran Huy Hoang LE ) 한국유통과학회 2023 유통과학연구 Vol.21 No.4
Purpose: This study aims to analyze the impact of Brand Anthropomorphism and Intimacy on Brand Engagement, and at the same time analyze the regulatory effect of Brand Reputation on the relationship between Brand Anthropomorphism and Intimacy and the relationship between Intimacy and Brand Engagement in terms of distribution brand. Results: The findings show that Brand Anthropomorphism, Intimacy, and Brand Reputation are important value factors in customers’ minds toward their behavior, and from there, they will contribute to creating positive emotions and interactions between consumers and brands. Research design, data, and methodology: This article used the quantitative technique utilizing PLS-SEM software to test the hypothesis with 1,060 samples. Collected data shows that consumers in Ho Chi Minh City have positive emotions and interactive and social behaviors toward smartphone brands. Conclusion: The study has demonstrated the conclusions and proposed solutions to help smartphone brands build Brand Anthropomorphism while enhancing Brand Reputation thereby achieving Intimacy, which leads to consumer Brand Engagement. In addition, this study complements the concept of Brand Anthropomorphism which is lacking in theoretical background and is the first study in Vietnam to explore the prefixes and suffixes of the concept of Brand Anthropomorphism and the regulatory role of Brand Reputation.
Le, Hien Thi Ngoc,Jeong, Hae Kyung Pergamon Press 2017 Electrochimica Acta Vol. No.
<P><B>Abstract</B></P> <P>The γ-cyclodextrin–graphite oxide–carbon nanotube (γCD–GO–CNT) composite has shown the best capability and sensitivity of supramolecular recognition compared to the other two CD-GO-CNT composites (αCD-GO-CNT and βCD-GO-CNT) in our previous study. The biggest CD (γCD) was very important in the formation of the supramolecular complex and made the detection of the biomolecules easier. In this report, significantly improved supramolecular recognition capability of γCD–GO–CNT is introduced by using thermally reduced GO (TRGO), instead of typical GO. New synthesized γCD–TRGO–CNT composite film shows lower electrochemical impedance, higher carbon to oxygen atomic ratio, and larger surface area compared to the γCD–GO–CNT composite film, resulting in higher sensitivity and capability in the supramolecular recognition. The sensitivity, defined as the slope of the maximum response current versus guest molecule concentration graph, increases significantly from 4.42 to 9.44 for dopamine and from 2.21 to 4.15 for ascorbic acid. The excellent enhancement of the supramolecular recognition of the γCD–TRGO–CNT composite is attributed to TRGO. It is, therefore, concluded that it is very important to load γCD in the composite as well as to decrease the electrochemical impedance for effective electrochemical biosensors.</P> <P><B>Highlights</B></P> <P> <UL> <LI> The γ-cyclodextrin- thermally reduced graphite oxide-carbon nanotube composite film was successfully synthesized. </LI> <LI> The γCD-TRGO-CNT composite shows enhanced supramolecular recognition capability compared to the γCD-GO-CNT composite. </LI> <LI> Sensitivity of the γCD-TRGO-CNT composite dramatically increased by a factor of two compared to the γCD-GO-CNT composite. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Le Ngoc Ha,Nguyen Dinh Chau,Bui Quang Bieu,Mai Hong Son 대한핵의학회 2022 핵의학 분자영상 Vol.56 No.4
Purpose The aim of this study was to investigate whether standard uptake values (SUVs) of pretreatment 18F-FDG PET/CT were the surrogate parameters for predicting the outcomes in locally advanced esophageal squamous cell carcinoma patients treated with definitive chemoradiotherapy. Materials and Methods Sixty patients with esophageal squamous cell carcinoma underwent pretreatment 18F-FDG PET/CT and received definitive chemoradiotherapy. 18F-FDG metabolic parameters including SUVmax, SUVmean, SULpeak, total lesion glycolysis (TLG), and metabolic tumor volume (MTV) of primary tumor were calculated. The receiver-operating characteristic (ROC) curve was used to determine the optimal cutoff value of FDG PET/CT-derived parameters that associated with treatment response. Estimating progression-free survival (PFS) and overall survival (OS) was analyzed by using Kaplan–Meier methods. Univariate and multivariate analysis for PFS and OS was performed using Cox regression. Results Complete response was achieved in 38.3%. The 4-year OS and PFS rates were 48.6% and 44.4%, respectively. SUVmean with a cutoff value of 6.1 could predict complete response with sensitivity of 69.6%, specificity of 78.4%, and accuracy of 75%. Cox multi-factor regression analyses revealed SUVmean > 6.1 as an independent prognostic factor for OS (HR = 6.74, p = 0.02) and PFS (HR = 6.53, p < 0.001). Conclusions Our study suggests that SUVmean of the primary tumor in pretreatment 18F-FDG PET/CT may be used as an independent predictor in esophageal squamous cell carcinoma patients treated with definitive chemoradiotherapy.
Le Ngoc Cuong,Jong-Taek Oh 대한설비공학회 2016 International Journal of Air-Conditioning and Refr Vol.24 No.1
In this paper, the heat pump system has been developed by CFD simulation and experimental investigation. It studies the thermal behavior of a thermobank and COP on heat pump system and cold storage. The thermobank stores the waste heat of during refrigeration cycles and this energy is used for defrosting process and heating room. It also reduces defrosting time and condensation load so that the temperature regulation in the cold storage is constant. The system is investigated experimentally and CFD simulated under thermobank. The dimension L W H of cold storage is 3 1:6 1:4m, thermobank is 600 300 400 mm. The temperature of ambient on CFD simulation process is 20C. This heat pump system can be used to keep preservation of agricultural products in cold storage warehouse together with °oor panel heating for room in winter. The ejector is used in system with the aim of increasing coe±cient of performance (COP) and decrease in compressor displacement. As the experimental results, its COP is increased about 38.57% when using thermobank and ejector in heat pump system.
Le, Ngoc Minh,Hoang, Ba Cuong,Lee, Byung-Teak Materials Research Society of Korea 2017 한국재료학회지 Vol.27 No.12
ZnMgBeGaO/Ag/ZnMgBeGaO multilayer structures were sputter grown and characterized in detail. Results indicated that the electrical properties of the ZnMgBeGaO films were significantly improved by inserting an Ag layer with proper thickness (~ 10 nm). Structures with thicker Ag films showed much lower optical transmission, although the electrical conductivity was further improved. It was also observed that the electrical properties of the multilayer structure were sizably improved by annealing in vacuum (~35 % at $300^{\circ}C$). The optimum ZnMgBeGaO(20nm)/Ag(10nm)/ZnMgBeGaO(20nm) structure exhibited an electrical resistivity of ${\sim}2.6{\times}10^{-5}{\Omega}cm$ (after annealing), energy bandgap of ~3.75 eV, and optical transmittance of 65 % ~ 95 % over the visible wavelength range, representing a significant improvement in characteristics versus previously reported transparent conductive materials.
Intelligent Decision Support Algorithm for Uncertain Inventory Management
Le Ngoc Bao Long,Sam-Sang You,Truong Ngoc Cuong,Hwan-Seong Kim 한국항해항만학회 2023 한국항해항만학회 학술대회논문집 Vol.2023 No.1
This paper discovers a robust managerial strategy for a stochastic inventory of perishable products, where the model experiences changing factors including inner parameters and an external disturbance with unknown form. An analytical solution for the optimization problem can be obtained by applying the Hamilton-Bellman-Jacobi equation, however the policy result cannot completely suppress the oscillation from the external disturbance. Therefore, an intelligent approach named Radial Basis Function Neural Networks is applied to estimate the unknown disturbance and provide a robust controller to manipulate the inventory level more effective. The final results show the outstanding performance of RBFNN controller, where both the estimation error and control error are guaranteed in the predefined limit.
Le Ngoc Tran,Jeong-Ae Jeong,박정학 대한화학회 2016 Bulletin of the Korean Chemical Society Vol.37 No.7
A tert-butylcarbamoylquinine (tBuCQUI)-incorporated silica hybrid monolithic (QUI–SHM) capillary was prepared by “one-pot” approach via simultaneous sol–gel reaction of tetramethoxysilane and vinyltrimethoxysilane and free radical polymerization of tBuCQUI. A set of acidic chiral drugs were enantioseparated on QUI–SHM in mobile phases consisting of acetonitrile (ACN), methanol (MeOH), acetic acid (AcOH), and triethylamine (TEA). Influences of ACN/MeOH ratio, AcOH/TEA ratio, and their concentrations on enantioseparation were investigated. Baseline separations of enantiomers of all the compounds investigated were achieved with a mobile phase of 60:38 (v/v) ACN/MeOH containing 350 mM AcOH and 30 mM TEA under the applied voltage of −10 kV at 25°C.
Reductive amination of 2,5-Diformylfuran over nickel catalysts under mild conditions
( Le Ngoc Thuc ),한요한,김형록 한국공업화학회 2014 한국공업화학회 연구논문 초록집 Vol.2014 No.1
Aminescan be prepared byreductive amination of corresponding aldehydes with ammonia. By this way, various useful mono- and di-amines suchas furfurylamin, benzylamine, and an isomer mixture of 1,3- and 1,4-bis(aminomethyl)cyclohexane has been prepared. We have performedthe reductive amination of 2,5-diformylfuran (DFF), toprepare 2,5-bis(aminomethyl)furan (BAF) - an useful monomer in the production of polyamides, polyureathanes, etc. The reaction pathway, catalyst properties as well as reaction parameters have been described in thereductive amination of DFF.