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This paper investigates the system performance of hybrid time-power switching based relaying (TPSR) energy harvesting enabled in the multisource half-duplex relaying network over the Rayleigh fading channel. The outage probability (OP) of the proposed system model with implementing maximal ratio combining (MRC) and selection combination (SC) technique at the receiver is presented and analyzed.

8p viling 11-10-2024 5 1   Download

Flavonoids, a diverse group of secondary metabolites, are known for their health-promoting properties, including antioxidant, anti-inflammatory, and anticancer activities. Phyllanthus amarus is a medicinal plant with extensive traditional use and it is a rich source of flavonoids. This study aimed to elucidate the gene expression in flavonoid biosynthesis in P. amarus.

7p vifilm 11-10-2024 5 1   Download

Sentiment Analysis and Opinion Mining have emerged as highly popular fields for analyzing and extracting valuable information from textual data sourced from diverse platforms like Facebook, Twitter, and Amazon. These techniques hold a crucial role in empowering businesses to actively enhance their strategies by gaining comprehensive insights into customers' feedback regarding their products.

6p viengfa 28-10-2024 5 2   Download

This paper proposes a low-voltage ridethrough (LVRT) capability for a doubly-fed induction generator (DFIG) wind turbine (WT) system. With the proposed method, series grid-side converter (SGSC) in which its DC-side connected at the DC bus of the back-toback converters and its AC-side connected in series with line through transformer have been applied, enables to compensate a voltage response of the system during the grid faults and to reduce the capital cost.

9p viengfa 28-10-2024 3 1   Download

A crucial trend for the future is the integration of wind power (WP) into the grid, in order to guarantee that the source of energy used to replace fossil fuels pollutes the environment. The generation source, the load, or the shortcircuit occurrence will have an impact on the grid, therefore, have a suitable solution to ensure its safe operation.

8p viengfa 28-10-2024 2 1   Download

1-Hydroxyphenazine (HP) is a heterocyclic nitrogenous compound which reported various potential bioactivities. The current work aimed to utilize soybean residue by-product (SRBP) as a C/N source for the biosynthesis of HP via fermentation and investigated its potent inhibition against some plant pathogen fungi.

7p viengfa 28-10-2024 3 1   Download

Steel slag, one of the huge industrial waste sources, which has many outstanding advantages (hardness, roughness, angularity, and abrasion resistance) has been used as an aggregate in asphalt concrete to bring many benefits.

7p viengfa 28-10-2024 3 2   Download

The paper generalizes one practical tool for analyzing the structural dynamics for the high-speed railway bridge based on Cast3M open-source. Compared with the classical approach with the analytical formulation, KD-Railway developed by the finite element method allows defining the structure with complex geometry and considering a different type of structure (truss, cable, hybrid composite) or the structure-soil interaction.

10p viengfa 28-10-2024 3 2   Download

This study proposes the application of Ensemble Decision Tree Boosted (EDT Boosted) model for forecasting the surface chloride concentration of marine concrete Cs. A database of 386 experimental results was collected from 17 different sources covering twelve variables was used to build and verify the predictive power of the EDT model.

12p viengfa 28-10-2024 5 2   Download

Air pollution is getting worse in Viet Nam in recent years, particularly in big cities. The most important source of pollution are traffic and industrial activities. The paper "A Review on Current Status of Urban Air Pollution in Ho Chi Minh city and Ha Noi" reviews air pollution situation in Ho Chi Minh city and Ha Noi. We also recommend policies to tackle the problem: (i) upgrade the national air quality standard, (ii) install systematic and high-quality network of monitor stations, and (iii) remove means of transport that unmet emission regulations.

11p xuanphongdacy09 29-09-2024 8 1   Download

Disposed batteries contain the hazardous sources that directly impact on the environment. Proper disposal of used batteries is a vital matter because of toxit component found in types of batteries. This study focuses on the reutilization of the disposed Zn-battery graphite to produce graphene oxide (GO) via electrochemical exfoliation.

8p viling 11-10-2024 4 1   Download

This study aims to build a classifier for credit scoring based on deep learning. We use a credit scoring dataset publicly available on the UC Irvine Machine Learning Repository, a source of machine learning datasets commonly used by researchers.

7p viling 11-10-2024 3 1   Download

The focus of this paper is on studying power control for Interlinking Converters (ICs) to maintain stable voltage frequency on both AC and DC sides for a hybrid AC/DC microgrid in standalone mode, as well as the balance of active and reactive power. The control method also enhancing the resilience of the hybrid AC/DC microgrid during sudden load increases or power source failures in the AC and DC subgrids.

11p viinuzuka 28-02-2025 1 1   Download

Internal combustion engines are extensively used in various modes of transportation, including ships and cars. However, their operation generated significant noise, which can disrupt daily life and poses health risks. Prolonged exposure to noise can lead to insomnia, cardiovascular diseases, and even death, making noise pollution a growing social concern.

8p viinuzuka 28-02-2025 2 1   Download

This study focuses on the biological characteristics of the genetic resources of the Stephania brachyandra in Thai Nguyen, one of Vietnam's valuable medicinal plants currently at risk of extinction. Investigation results indicate that Stephania brachyandra is commonly found at an average density of 32.57 plants per square kilometer, with distribution density varying across districts, being highest in Vo Nhai district and lowest in Phu Luong district.

8p viinuzuka 28-02-2025 5 1   Download

This article investigates new aspects of the diplomatic relations between the Republic of Korea and the Republic of Vietnam from 1955 to 1957, through the analysis of Choi Duk Shin’s diplomatic reports. Through a comprehensive analysis of primary sources, including archival documents from both Korea and the U.S., the study reexamines these relations beyond the established focus on military cooperation.

11p vihyuga 20-02-2025 5 1   Download

This paper also discusses practical applications of object detection in satellite images, including environmental monitoring, resource management, and disaster response. Finally, the paper suggests potential future research directions, such as developing more efficient models, handling small objects, and leveraging diverse data sources.

9p vihyuga 20-02-2025 6 1   Download

Shampoo is a necessary hair care item for every person's everyday routine. The quest for environmentally friendly and naturally sourced products has led to an investigation into the production of synthetic shampoos using natural components such as fabaceae fruit, pomelo peel, and lime peel.

7p viyamanaka 06-02-2025 3 1   Download

Achieving ecologically sustainable development requires utilizing the added value of waste sources to synthesize functional materials. Currently, Vietnam is a country with developed agriculture, and agricultural by-products are increasing over the years.

8p viyamanaka 06-02-2025 4 1   Download

In recent years, the development of hydrogen as a new reliable energy source has become a trend and caught lots of attention from all over the world. Hydrogen is a fundamental element that can be produced via different processes, which can be classified into three main groups: green processes (electrolysis), carbon-treated processes (thermoconversion processes), and traditional processes (reforming processes). Hydrogen products were identified using their specific color such as green, blue, and brown hydrogen…

15p viyamanaka 06-02-2025 4 2   Download