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Xuan Thinh Mai,Won Bom Kim 한국유통과학회 2017 한국유통과학회 학술대회 논문집 Vol.2017 No.-
KakaoTalk and ZALO, which are popular mobile instant messengers in Korea and Vietnam, and show the reason why they are popular among the users of the two countries, the motives of users and the quality factors of messenger, Satisfaction and the differences and characteristics of mobile instant in both countries. The results of this study suggest the following implications. The similarity between Korean and Vietnamese users shows that the user satisfaction of mobile instant messenger has an influence on re - use intention and recommendation intention. In Korea, utility, hedonic, system quality, service quality, information quality, etc. Vietnamese mobile instant messenger users showed preference for self-expression, and the more they are interested in others, the better their mood will be. System quality and service quality factors have a positive effect on satisfaction for Korean users Korean users are sensitive to system quality and service quality, and system quality and service quality have a strong influence on usage purpose, which may have a significant effect on user satisfaction. Satisfaction of mobile instant messenger in both Korea and Vietnam affected reuse intention and recommendation intention. The higher the reliability of the service, therefore, it is necessary to provide a service that can improve the satisfaction of mobile instant messenger users in both Korea and Vietnam in order to increase the intention of reuse and recommendation intention.
Thinh, Phung Xuan,Basavaraja, C.,Kim, Won Jung,Huh, Do Sung Wiley Subscription Services, Inc., A Wiley Company 2011 Polymer composites Vol.32 No.11
<P><B>Abstract</B></P><P>Poly(<I>N</I>‐vinylcarbazole) (PVK) composites containing different concentrations of multiwalled carbon nanotube (MWCNT) were synthesized through the oxidative polymerization of <I>N</I>‐vinylcarbazole with ferric chloride. The synthesized composites were characterized using Fourier transform infrared spectroscopy, ultraviolet‐visible spectra, and thermogravimetric analysis. A honeycomb‐patterned film was fabricated by casting the PVK–MWCNT composite solution under humid conditions. The morphology of the honeycomb‐patterned films in the PVK–MWCNT polymer composites and the dependence of its pore diameter and pore height on MWCNT concentration were analyzed using scanning electron microscopy. The honeycomb‐patterned films were treated at 150, 250, 400, and 490°C to study the arrangement of MWCNTs in the patterned films and to measure the DC conductivity depending on the calcination temperature. DC conductivity of the patterned films was increased by increasing the concentration of MWCNT in the composites and in the increased pretreatment temperature. POLYM. COMPOS., 2011. © 2011 Society of Plastics Engineers</P>
Thinh Huynh,Anh Tuan Pham,Jaehong Lee,Hung Nguyen-Xuan 한국정밀공학회 2024 International Journal of Precision Engineering and Vol.11 No.1
Fuel cell hybrid electric vehicles (FCHEVs) have been recognized as a promising solution for green and sustainable transportation. Unfortunately, the low performance and high operational cost make current FCHEVs less attractive than their alternatives. In this paper, we address a new contribution to the optimal design for the FCHEV components’ parameters in order to enhance their performance and reduce their operating cost. We consider a passenger FCHEV and propose a parametric design method for its polymer electrolyte membrane fuel cell system, lithium-ion battery, electric motor and differential unit by the balancing composite motion optimization (BCMO) algorithm. The FCHEV model can be used to analyze the influence of the parameters of each of the aforementioned components. The desired performance, the hydrogen consumption, the efficiency of the fuel cell system, and the lifespan of the power sources are all taken into account through a single cost function. The optimization procedure is introduced, where the fuel cell maximal net power, battery capacity and maximal power capacity, motor maximal power, and powertrain gear ratio are optimally designed. Finally, comparative studies are conducted and validate the effectiveness of the proposed method.
The Effects of Corporate Governance on Segment Reporting Disclosure: A Case Study in Vietnam
Quoc Thinh TRAN,Ngoc Khanh Dung NGUYEN,Xuan Thuy LE 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.4
Accounting information is essential for users. Useful information helps users to make appropriate investment-related decisions. Segment reporting disclosure plays a practical role for an investor in a business. The article data was surveyed by ordinary least squares to test the effects of corporate governance on the segment reporting disclosure. The article employed time-series data with 136 observations of the top 100 non-financial Vietnamese enterprises listed on the stock exchange in the period of 2018–2019. The research used two popular theories related to stakeholder and agency to explain the effects of factors on segment reporting disclosure. The results have identified two factors that have a positive impact on segment reporting disclosure, namely, the size of the board and the ratio of foreign members to the total number of the board. Accordingly, the managers of the top 100 Vietnamese listed enterprises should increase the number of board members as well as pay attention to the number of foreign members to contribute to improving the information disclosure on the segment reporting. It is the basis to improve the quality of information to ensure completeness and transparency. It contributes to attracting foreign investment to meet the trend of international economic integration.
Factors Affecting Quality of Internal Control: A Case Study of Listed Banks in Vietnam
Quoc Thinh TRAN,Khanh Tuan NGUYEN,Xuan Thuy LE 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.5
Internal control is important for monitoring operations of organizations. In order to achieve the quality of internal control, organizations need to recognize different perspectives in which the components of internal control play a decisive role. Internal control is a process designed by the manager and it is applied within the organization to provide reasonable assurance of the reliability of financial information and to comply with policies, procedures, rules, regulations and laws. The article uses the ordinary least squares method and the seven-point Likert scale to test the variables affecting the quality of internal control in 18 Vietnamese listed banks. The article surveyed 179 leaders of listed banks. The results show that there are three variables out of a total of five variables that positively affect the quality of internal control, including the control environment, control activities, and monitoring. Accordingly, the managers of Vietnamese listed banks need to pay attention to building a corporate culture environment, improve the quality of control activities, and periodically and regularly conduct the monitoring. It contributes to improving the quality of internal control and is also an opportunity to increase economic benefits for Vietnamese listed banks in the context of international economic integration.
Quoc Thinh TRAN,Ngoc Khanh Dung NGUYEN,Xuan Thuy LE 한국유통과학회 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.1
Accounting information disclosure by enterprises is important for third-party entities (suppliers, creditors, banks, regulators, etc.). Voluntary accounting information disclosure (VAID) refers to additional information related to business activities shown on the annual report above and beyond the required information about business results and financial position as well as cash flow. This supports the stakeholders gaining useful information to make proper business decisions. The article examines the influence of ownership structure on the voluntary accounting information disclosure of the top 100 Vietnamese listed companies (VN100). Data collected by authors on regular annual reports totaled 425 observations from 2015 to 2019. The article uses OLS to test multivariate regression models with time-series data. The research results show that there are three variables affecting voluntary accounting information disclosure, of which foreign ownership and institution ownership have a positive impact, while concentration ownership has an opposite impact. Accordingly, the managers of VN100 should raise awareness in order to demonstrate the obligation of information providers to users to ensure clarity and completeness. The state agencies should encourage VN100 to enhance voluntary accounting information disclosure. This contributes to improve the information level of Vietnamese listed companies to embrace the trend of international economic integration.
ABSTRACT RANDOM LINEAR OPERATORS ON PROBABILISTIC UNITARY SPACES
Tran, Xuan Quy,Dang, Hung Thang,Nguyen, Thinh Korean Mathematical Society 2016 대한수학회지 Vol.53 No.2
In this paper, we are concerned with abstract random linear operators on probabilistic unitary spaces which are a generalization of generalized random linear operators on a Hilbert space defined in [25]. The representation theorem for abstract random bounded linear operators and some results on the adjoint of abstract random linear operators are given.
TRAN, Quoc Thinh,VO, Thi Diu,LE, Xuan Thuy Korea Distribution Science Association 2021 The Journal of Asian Finance, Economics and Busine Vol.8 No.3
In view of integration and development, compliance with regulations on information disclosure has important implications for users. Corporate social responsibility disclosure (CSRD) is an increasing concern of the community and society. CSRD always poses many challenges for the profitability of banks. The article uses the ordinary least square method to examine this relationship and employs timeseries data of five years from 18 Vietnamese listed banks from 2015 to 2019. The analysis is informed by Jensen and Meckling's Agency theory, Freeman's Stakeholder theory, and Dowling and Pfeffer's Legitimacy theory. The study results show that, with the CSRD dependent variable, return on assets (ROA) and net interest margin (NIM) have an opposite influence, but return on equity (ROE) has no effect on CSRD, while on the profitability dependent variable, CSRD has a different influence from ROA, ROE, and NIM. To enhance the relationship between CSRD and profitability, Vietnamese listed banks need to comply with CSRD as well as demonstrate responsibility to the community and society. Managers need to have clear development policies and strategies to ensure both profitability and responsibility regarding social and community activities. The State Securities Commission of Vietnam should enforce strict sanctions, conduct inspection, and complete evaluation criteria for Vietnamese listed banks.