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- 저자 : Nguyen Duong Ngoc Diem (검색결과 3 건)
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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.
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Giant Strain in Lead-free Relaxor/Ferroelectric Piezocomposite Ceramics
Thi Hinh Dinh,Jin-Kyu Kang,Hoang Thien Khoi Nguyen,Trang An Duong,Jae-Shin Lee,Vu Diem Ngoc Tran,Ky Nam Pham 한국물리학회 2016 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.68 No.12
The crystal structural, ferroelectric, and electric-field-induced-strain (EFIS) properties of leadfree relaxor/ferroelectric piezocomposites were investigated. The relaxor-matrix phases were mixed with the ferroelectric-seed phases by using a conventional ceramic processing route. The addition of the ferroelectric seed phase dramatically enhanced the EFIS of the relaxor matrix phase at low electric fields. Giant strains of 745 pm/V at 4 kV/mm and 466 pm/V at 3 kV/mm were obtained when the seed contents were 30 wt% and 50 wt%, respectively, which are much higher than those of the relaxor matrix phase without ferroelectric seeds (575 pm/V at 4 kV/mm and 327 pm/V at 3 kV/mm).
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Soh Fanny Chiat Orou,Kee Jeik Hang,Myo Thuya Thien,Ying Yuet Lee,Le Cheng Foh,Nguyen Duong Ngoc Diem,Goh Boon Hee,Pung Swee Yong,Pung Yuh Fen 한국공업화학회 2018 Journal of Industrial and Engineering Chemistry Vol.62 No.-
Many studies suggested that waste water treatment using metal oxide nanoparticles, in particular the zinc oxide nanoparticles, appears to be an economical and efficient solution. However, antibacterial activities reported from various research groups were often confusing and contradicting. The present study aimed to evaluate the antibacterial effects and the underlying mechanisms on the custom-engineered Zinc oxice (ZnO) nanorods and ZnO nanodisks. Firstly, antibacterial activities of ZnO nanorods and ZnO nanodisks were studied on both Gram positive and Gram negative bacteria. The antibacterial performance of these ZnO nanoparticles were bench marked with titanium dioxide nanoparticles (TiO2). In antibacterial susceptibility assay, both types of ZnO nanoparticles showed potent inhibition on Bacillus subtilis (B. subtilis) and Staphylococcus aureus (S. aureus) with minimal inhibitory concentration (MIC) at 128 and 256 ug/ml, respectively. Nevertheless, no inhibition was found against Gram negative bacteria. Interestingly, no inhibition was found against both Gram positive and Gram negative bacteria for TiO2 nanoparticles, and thus TiO2 nanoparticles were omitted in the subsequent study. In the time-kill kinetics assay, the inhibitory effect of both types of ZnO nanoparticles on B. subtilis was significant as early as 90 min after treatment at 128 μg/ml. Besides different types of bacteria, generation of reactive oxygen species (ROS), surface area, surface charges, polarity were also examined. Our study suggested that the antibacterial effects of ZnO nanorods and ZnO nanodisks were mediated through not one but multiple chemical and physical properties of nanoparticles. This is the first report introducing a new concept on ‘Nanotoxicity Threshold’, i.e. the maximal tolerance level in bacteria before any damage manifested. Our study warrants that a more holistic view on the mechanistic insights of nanoparticles is required to minimize adverse health effect on human.
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