Scientific Research Articles 2021

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1 TS. Văn Thiên Hoàng Dispatching the problems in implementing mobile payment services from consumer attitude perspective Tạp chí quốc tế Scopus 2021 Indonesian Journal of Electrical Engineering and Computer Science ISSN: 2502-4752 Tác giả chính
Abstract: Due to the abundance of internet and E-commerce (Electronic commerce), an exces- sive amount of data has been generated causing an overload of information to the current network infrastructure. As an attempt to solve this problem, there is a shift to mobile payment in the field of E-commerce. Thus, it is essential to study the adoption level of such service for global markets in general and the Vietnamese market in spe- cific. In this paper, we study the consumers’ attitude toward mobile payment, investi- gated with the Theory of Planned Behavior (TPB) from three perspectives, namely the consumer innovativeness, perceived benefit, and perceived risk. Accordingly, there are six hypotheses proposed to study the consumers’ attitude toward the service. Thanks to the Structural Equation Modeling (SEM) method, a population of 250 Vietnamese mo- bile payment users was analyzed to confirm five out of the six hypotheses. It is drawn that the attitude toward the service is correlated positively with the innovativeness and the perceived benefit, while correlated negatively with the perceived risk. Besides, the resulted model can elucidate approximately 49% the consumers’ intention to reuse the mobile payment service.
2 TS. Vo Anh Tien Dispatching the problems in implementing mobile payment services from consumer attitude perspective Tạp chí quốc tế Scopus 2021 Indonesian Journal of Electrical Engineering and Computer Science ISSN: 2502-4752 Tác giả phụ
Abstract: Due to the abundance of internet and E-commerce (Electronic commerce), an exces- sive amount of data has been generated causing an overload of information to the current network infrastructure. As an attempt to solve this problem, there is a shift to mobile payment in the field of E-commerce. Thus, it is essential to study the adoption level of such service for global markets in general and the Vietnamese market in spe- cific. In this paper, we study the consumers’ attitude toward mobile payment, investi- gated with the Theory of Planned Behavior (TPB) from three perspectives, namely the consumer innovativeness, perceived benefit, and perceived risk. Accordingly, there are six hypotheses proposed to study the consumers’ attitude toward the service. Thanks to the Structural Equation Modeling (SEM) method, a population of 250 Vietnamese mo- bile payment users was analyzed to confirm five out of the six hypotheses. It is drawn that the attitude toward the service is correlated positively with the innovativeness and the perceived benefit, while correlated negatively with the perceived risk. Besides, the resulted model can elucidate approximately 49% the consumers’ intention to reuse the mobile payment service.
3 TS. Văn Thiên Hoàng Outage Probability Analysis for Hybrid TSR-PSR Based SWIPT Systems over Log-normal Fading Channels International Journal of Electrical and Computer Engineering (IJECE) ISSN: 2088-8708 Tác giả chính
Abstract: Employing simultaneous information and power transfer (SWIPT) technology in cooperative relaying networks has drawn considerable attention from the research community. We can find several studies that focus on Rayleigh and Nakagami-m fading channels, which are used to model outdoor scenarios. Differing itself from several existing studies, this study is conducted in the context of indoor scenario modelled by log-normal fading channels. Specifically, we investigate a so-called hybrid time switching relaying (TSR) – power splitting relaying (PSR) protocol in an energy-constrained cooperative amplify-and-forward (AF) relaying network. We evaluate the system performance with outage probability (OP) by analytically expressing and simulating it with Monte Carlo method. The impact of power-splitting (PS), time-switching (TS) and signal-to-noise ratio (SNR) on the OP was as well investigated. Subsequently, the system performance of TSR, PSR and hybrid TSR-PSR schemes were compared. The simulation results are relatively accurate because they align well with the theory.
4 TS. Văn Thiên Hoàng Outage Performance Analysis of Non-Orthogonal Multiple Access systems with RF energy harvesting International Journal of Electrical and Computer Engineering (IJECE) ISSN: 2088-8708 Tác giả chính
Abstract: Non-orthogonal multiple access (NOMA) has drawn enormous attention from the research community as a promising technology for future wireless communications with increasing demands of capacity and throughput. Especially, in the light of fifth-generation (5G) communication where multiple Internet-of-Things (IoT) devices are connected, the application of NOMA to indoor wireless networks has become more interesting to study. In view of this, we investigate the NOMA technique in energy harvesting (EH) half-duplex (HD) decode-and-forward (DF) power-splitting relaying (PSR) networks over indoor scenarios which are characterized by log-normal fading channels. The system performance of such networks is evaluated in terms of outage probability ( OP ) and total throughput for delay-limited transmission mode whose expressions are derived herein. In general, we can see in details how different system parameters affect such networks thanks to the results from Monte Carlo simulations. For illustrating the accuracy of our analytical results, we plot them along with the theoretical ones for comparison.
5 TS. Vo Anh Tien Outage Performance Analysis of Non-Orthogonal Multiple Access systems with RF energy harvesting International Journal of Electrical and Computer Engineering (IJECE) ISSN: 2088-8708 Tác giả phụ
Abstract: Non-orthogonal multiple access (NOMA) has drawn enormous attention from the research community as a promising technology for future wireless communications with increasing demands of capacity and throughput. Especially, in the light of fifth-generation (5G) communication where multiple Internet-of-Things (IoT) devices are connected, the application of NOMA to indoor wireless networks has become more interesting to study. In view of this, we investigate the NOMA technique in energy harvesting (EH) half-duplex (HD) decode-and-forward (DF) power-splitting relaying (PSR) networks over indoor scenarios which are characterized by log-normal fading channels. The system performance of such networks is evaluated in terms of outage probability ( OP ) and total throughput for delay-limited transmission mode whose expressions are derived herein. In general, we can see in details how different system parameters affect such networks thanks to the results from Monte Carlo simulations. For illustrating the accuracy of our analytical results, we plot them along with the theoretical ones for comparison.

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