Energy harvesting based two-way full-duplex relaying network over a Rician fading environment: performance analysis

Full-duplex transmission is a promising technique to enhance the capacity of communication systems. In this paper, we propose and investigate the system performance of an energy harvesting based two-way full-duplex relaying network over a Rician fading environment. Firstly, we analyse and demonstrate the analytical expressions of the achievable throughput, outage probability, optimal time switching factor, and symbol error ratio of the proposed system. In the second step, the effect of various parameters of the system on its performance is presented and investigated. In the final step, the analytical results are also demonstrated by Monte Carlo simulation. The numerical results proved that the analytical results and the simulation results agreed with each other.Web of Science68112311

The Impact of Digital Transformation in Higher Education: The Case Study from Vietnam

The education sector in general and higher education, in particular, has paid great attention to digital transformation into teaching. Digital transformation is not only a general development trend but also helps to change the traditional teaching method to a new active teaching method that helps learners to be active and creative when participating in the learning process. The traditional classroom model, which has existed for a long time, is gradually shifting to classrooms that apply information technology to teaching and learning to reduce lectures and transfer knowledge to develop the initiative, creativity, and capacity of students to learn. Create opportunities for learners to learn anytime, anywhere, learners can be active in the learning process, contributing to building a learning society. The article clarifies the impact of digital transformation on higher education in Vietnam. From there, offer an oriented solution to help digital transformation become an effective tool in higher education in Vietnam today

Multisource power splitting energy harvesting relaying network in half-duplex system over block Rayleigh fading channel: System performance analysis

Energy harvesting and information transferring simultaneously by radio frequency (RF) is considered as the novel solution for green-energy wireless communications. From that point of view, the system performance (SP) analysis of multisource power splitting (PS) energy harvesting (EH) relaying network (RN) over block Rayleigh-fading channels is presented and investigated. We investigate the system in both delay-tolerant transmission (DTT), and delay-limited transmission (DLT) modes and devices work in the half-duplex (HD) system. In this model system, the closed-form (CF) expressions for the outage probability (OP), system throughput (ST) in DLT mode and for ergodic capacity (EC) for DTT mode are analyzed and derived, respectively. Furthermore, CF expression for the symbol errors ratio (SER) is demonstrated. Then, the optimal PS factor is investigated. Finally, a Monte Carlo simulation is used for validating the analytical expressions concerning with all system parameters (SP).Web of Science81art. no. 6

Black-box modeling of nonlinear system using evolutionary neural NARX model

Nonlinear systems with uncertainty and disturbance are very difficult to model using mathematic approach. Therefore, a black-box modeling approach without any prior knowledge is necessary. There are some modeling approaches have been used to develop a black box model such as fuzzy logic, neural network, and evolution algorithms. In this paper, an evolutionary neural network by combining a neural network and a modified differential evolution algorithm is applied to model a nonlinear system. The feasibility and effectiveness of the proposed modeling are tested on a piezoelectric actuator SISO system and an experimental quadruple tank MIMO system

Secure Information Flow for IoT Applications

This paper discusses how to ensure security, i.e., confidentiality and integrity properties, for data in IoT applications. While confidentiality could be assessed via information flow analysis, integrity is ensured by error-correcting codes. In addition to errors, many communication channels also cause erasures, i.e., the demodulator cannot decide which symbol the received waveform represents. The paper proposes a method that might correct both errors and erasures together. Our method is efficient in reducing memory storage as well as decoding complexity

EFL TEACHERS’ PERCEPTIONS AND THEIR REPORTED PRACTICES OF ENACTING THE COMMUNICATION AND CULTURE SECTION IN THE NEW ENGLISH TEXTBOOK

The development of globalization and integration requires a modern workforce with 21st-century skills, especially intercultural communicative competence (ICC). Thanks to the National Foreign Language 2020 project, the new English textbooks were introduced to Vietnamese students with the hope prepare them for ICC. Research on how EFL teachers explored the new teaching materials has been made, but previous findings show limitations on EFL teachers’ practices in the communication and culture section. Hence, this descriptive research was conducted to investigate EFL teachers’ perceptions and their reported practices of enacting this section. A mixed-method approach was employed to collect quantitative and qualitative data. Seventy-two EFL teachers in the Mekong Delta responded to the questionnaire and seven of them joined the semi-structured interviews. Results revealed various EFL teachers’ perceptions and high levels of agreement on their practices of four dimensions of ICC. The study also suggested further research should look into students’ perspectives.  Article visualizations