The trend of using smart teaching devices in education in Vietnam

This study examines the growing integration of intelligent educational tools within the educational framework of Vietnam, underscoring the nation's swift shift towards a technology-centered learning environment. With 72.1 million internet users in Vietnam, marked by a 98.1% adoption rate of smartphones, 58.8% usage of laptops, and 35.5% ownership of tablets, these sophisticated devices have assumed a central role in the field of education. Notably, there exist governmental initiatives aimed at reinforcing the legal infrastructure, serving as a testament to Vietnam's dedication to advancing education through technological means. Smart educational devices have brought about a transformation in teaching techniques, rendering lessons more captivating, efficient, and accessible. The authors conducted a survey among a randomly selected group of 255 participants, revealing that the entire cohort utilizes smart devices for educational or work-related purposes. Nonetheless, certain students tend to employ smartphones for entertainment, which has raised inquiries regarding their scholastic impact. The paper explores the role of laptops, accentuating their revolutionary contribution to education and the necessity for further investigation to gain deeper insights into their effects. Furthermore, it investigates the obstacles encountered, encompassing technology-related distractions in educational contexts and disparities in technology access. Ultimately, this research underscores the significance of addressing these impediments to fully exploit the potential of intelligent educational devices in Vietnam's educational landscape, with the added benefit of drawing comparisons with global trends to glean valuable insights for further enhancing the educational domain

Influence of Ca[Mg3SiN4]Ce3+ phosphor’s concentration on optical properties of the 5600K RP-WLEDs

In this paper, we propose Ca[Mg3SiN4]Ce3+ Phosphor as a new material solution for improving the optical properties in terms of CRI, CQS. D-CCT, LO of the 5600K remote-packaging white LEDs (RP-WLEDs). In the first stage, we built and investigated the 5600K RP-WLEDs by adding the red phosphor to the phosphor layer. Then, the scattering processes inside the phosphor layer are investigated by Mat Lab software. From the research results, we discovered that the concentration of the adding phosphor significantly improved the optical properties of the5600K RP-WLEDs. All the results are convinced by Light Tools and Mat Lab software

Multi-source in DF cooperative networks with the PSR protocol based full-duplex energy harvesting over a Rayleigh fading channel: performance analysis

Due to the tremendous energy consumption growth with ever-increasing connected devices, alternative wireless information and power transfer techniques are important not only for theoretical research but also for saving operational costs and for a sustainable growth of wireless communications. In this paper, we investigate the multi-source in decode-and-forward cooperative networks with the power splitting protocol based full-duplex energy harvesting relaying network over a Rayleigh fading channel. In this system model, the multi-source and the destination communicate with each other by both the direct link and an intermediate helping relay. First, we investigate source selection for the best system performance. Then, the closed-form expression of the outage probability and the symbol error ratio are derived. Finally, the Monte Carlo simulation is used for validating the analytical expressions in connection with all main possible system parameters. The research results show that the analytical and simulation results matched well with each other.Web of Science68327526

Energy harvesting half-duplex AF power splitting protocol relay network over rician channel in case of maximizing capacity

In this letter, we propose a novel power splitting protocol for energy harvesting half-duplex AF relaying communication systems. In our proposed system, the relay harvests energy from the source transmissions, by employing adaptive PS protocol, for powering the retransmissions to the destination. The proposed model system is investigated in cases maximize and non-maximize ergodic capacity. Firstly, we perform the analytical mathematical analysis for deriving the integral closed-form expression of the outage probability and the ergodic capacity. Then, the analytical analysis of the system performance can be convinced by Monte-Carlo simulation with helping Mat Lab software. Finally, the numerical analysis provides practical insights into the effect of various system parameters on the system performance of the proposed system. This paper can be considered as a recommendation for the energy harvesting communication network

Ba[Mg2Al2N4]Eu2+ phosphor for enhancing the optical quality of the 6600K CPW-LEDs

Compared with conventional lamps, LED-based light sources have a superior lifetime, efficiency, and reliability, which promise significant reductions in power consumption and pollution from fossil fuel power plants. The main purpose of this paper is proposed and investigated the effect of the concentration of Ba[Mg2Al2N4]Eu2+conversion phosphor on the CCT deviation (D-CCT) and lumen output (LO) of the 6600 K conformal-packaging white LEDs (CPW-LEDs). For this purpose, we used the Light Tools and Mat Lab software to investigate this problem. From the research results, we can state that the concentration of the red phosphor crucially influenced on the optical quality of the 6600 K CPW-LEDs. The D-CCT can be decreased from 4700K to 2500K, and the LO can be increased from 600 lm. to 1200 lm. This research can provide the new recommendation for LEDs industry at this time

Using real interpolation method for adaptive identification of nonlinear inverted pendulum system

In this paper, we investigate the inverted pendulum system by using real interpolation method (RIM) algorithm. In the first stage, the mathematical model of the inverted pendulum system and the RIM algorithm are presented. After that, the identification of the inverted pendulum system by using the RIM algorithm is proposed. Finally, the comparison of the linear analytical model, RIM model, and nonlinear model is carried out. From the results, it is found that the inverted pendulum system by using RIM algorithm has simplicity, low computer source requirement, high accuracy and adaptiveness in the advantages

Power beacon-assisted energy harvesting in a half-duplex communication network under co-channel interference over a Rayleigh fading environment: Energy efficiency and outage probability analysis

In this time, energy efficiency (EE), measured in bits per Watt, has been considered as an important emerging metric in energy-constrained wireless communication networks because of their energy shortage. In this paper, we investigate power beacon assisted (PB) energy harvesting (EH) in half-duplex (HD) communication network under co-channel Interferer over Rayleigh fading environment. In this work, we investigate the model system with the time switching (TS) protocol. Firstly, the exact and asymptotic form expressions of the outage probability (OP) are analyzed and derived. Then the system EE is investigated and the influence of the primary system parameters on the system performance. Finally, we verify the correctness of the analytical expressions using Monte Carlo simulation. Finally, we can state that the simulation and analytical results are the same.Web of Science1213art. no. 257

Vietnam's socioeconomic status influence on the passport power

Passports are indeed becoming increasingly important in our interconnected world. As the world becomes more interconnected through trade, travel, and digital communication, the need for international travel has grown. Passports are essential for individuals to move across borders, whether for tourism, business, or personal reasons. International education and employment opportunities have become more accessible and desirable. Students and professionals often need passports to study or work abroad. Countries with stable political and economic conditions tend to have passports that grant their citizens greater visa-free access to other nations. As a result, passport strength can be a reflection of a country's overall stability and standing in the world. Many countries enter into bilateral or multilateral agreements to allow visa-free travel between their citizens. A strong passport, with visa-free access to many countries, can simplify travel and reduce costs and administrative burdens. Indeed, a country's socioeconomic status can have a significant impact on its passport power. The socioeconomic factors of a nation, such as its economic strength, political stability, and human development indicators, often correlate with the global acceptance and strength of its passport.  While socioeconomic factors are important, it's essential to remember that passport power is a complex interplay of various elements, including diplomatic relations, international agreements, and economic strength. Therefore, while socioeconomic status is a crucial element, it is just one piece of the puzzle in determining a passport's global influence

Hybrid decode-amplify and forward protocol of FD EH relaying network: outage probability analysis

Nowadays, many research papers focus on the WPCN problem and how to improve its efficiency. In this research, we propose and investigate Hybrid Decode-Amplify and Forward Protocol (HDAF) of the Full-Duplex (FD) Energy Harvesting (EH) Relaying Network with the Time Switching (TS) protocol. In the beginning stage, we present the HDAF mode, which can be work like a Decode-and-Amplify (DF) or Amplify-and-Forward (AF) modes based on the best of its performance in the FD EH relaying network. Furthermore, the closed-form expression of the outage probability (OT) is analyzed and derived in connection with the primary system parameters. Besides, the comparison of the system performance in the AF, DF, and HDAF is proposed and investigated. Finally, all the results are convinced by the Monte Carlo simulation for all cases