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Le Thai Nam,Dao Duy Thang 한국유통과학회 2017 한국유통과학회 학술대회 논문집 Vol.2017 No.-
This study is empirically to examine relationship of Vietnam Online Shopping Mall Characteristic, System Quality and Consumer Reuse. Data was collected by administering a survey to consumer used online shopping mall. The survey questionnaire comprised of a 5-point Likert scale. The demographic analysis was conducted using the frequency analysis method and relationship of variable was conducted using the EFA analysis, reliability analysis, multiple regression analysis. The results of study are “online shopping mail characteristic effect to consumer satisfaction”, “system quality effect to consumer reliability” but “System interactivity don’t effect to consumer Reliability”, and “consumer reliability and satisfaction effect to Consumer reuse Intention”.
Yang, Byeong Woo,Quang Dao, Pham Duy,Yoon, Nam Sik,Cho, Chan Sik Elsevier 2017 Journal of organometallic chemistry Vol.851 No.-
<P><B>Abstract</B></P> <P>2-(2-Bromovinyl)benzimidazoles are coupled and cyclized with 1,3-diketones in DMF in the presence of a catalytic amount of copper(I) iodide and a base to afford the corresponding benzo[4,5]imidazo[1,2-<I>a</I>]pyridines in moderate yields. 2-(2-Bromoaryl)benzimidazoles also react with 1,3-diketones under similar reaction conditions to give benzo[4,5]imidazo[2,1-<I>a</I>]isoquinolines in similar yields.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Copper-catalyzed carbon-carbon coupling followed by cyclization. </LI> <LI> Synthesis of benzimidazole-fused pyridines and isoquinolines. </LI> <LI> A new synthetic method for N-fused heterocycles using coupling and cyclization protocol. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
VUONG, Bui Nhat,TUNG, Dao Duy,GIAO, Ha Nam Khanh,DAT, Ngo Tan,QUAN, Tran Nhu Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.7
Capital mobilization is a traditional business of commercial banks and is one of the core foundations for the development of a bank. Capital mobilization is the main input in the operation of a bank, and this is also the basis for generating output for credit activities as well as other banking activities. This study aims to determine the main factors that affect the decisions of individual customers to put savings deposit in Vietnamese commercial banks. Survey data collected from 403 individual customers were analyzed to provide evidence. The results from the multiple regression analysis by using SPSS software revealed that all scales in this study were reliable, and there were six components impacting the savings deposit decision of individual customers from the strongest to the weakest in the following order: the form of promotion, bank brand, service quality, interest rate policy, and employee knowledge and attitude. Besides, the finding showed customers who have high income tend to have a stronger decision on savings deposits in commercial banks. The main findings of this article provide some empirical implications for marketers in banks and serve as a suggestion to improve these factors in order to retain and attract individual customers' savings deposit decisions.
Dong-hyo Yang,Rajiv Ranjan Srivastava,Min-seuk Kim,Dao Duy Nam,Jae-chun Lee,Hai Trung Huynh 대한금속·재료학회 2016 METALS AND MATERIALS International Vol.22 No.5
We present a process to recycle strategic metals, viz. tungsten and cobalt, from a WC-Co hardmetal sludge (WCHS) via oxidation followed by a two-step hydrometallurgical treatment with alkali and acid solutions. The oxidation of WCHS was investigated in the temperature range of 500 to 1000 °C and optimized at 600 °C to transform the maximum WC into an alkali-soluble WO3. The conditions for the selective dissolution of WO3 in stage-I were optimized as follows: 4.0 M NaOH, pulp density of 175 g/L, and temperature of 100 °C for 1 h, yielding maximum efficacy. Subsequently, in the second step, the optimal conditions for cobalt leaching from the alkali-treated residue were established as follows: 2.0 M H2SO4, 25 g/L pulp density, and 75 °C temperature for 30 min. Downstream processing of the obtained metal ions in solutions was also easier, as the only impurity of dicobaltite ions with the Na2WO4 solution was precipitated as Co(OH)3 under atmospheric O2; meanwhile, the CoSO4 solution obtained through the second step of processing can be treated via electrolysis to recover the metallic cobalt. The present process is simpler in operation, and the efficient use of eco-friendly lixiviants eliminates the previously reported disadvantage.