Using indexers

In this article, we establish a Digital Radio over Fiber (DRoF) information system with two wireless channels utilizing two advanced phase modulation techniques, namely Differential Phase Shift Keying (DPSK), for the CRAN connection and investigate parameters related to nonlinearity such as refractive index n2.

6p viengfa 28-10-2024 2 2   Download

In the present study, we aimed to evaluate the lead (Pb) partitioning and its ecological risks in tidal creek sediments within the Can Gio mangrove estuary by using a method of sequential extraction.

9p viengfa 28-10-2024 1 1   Download

In this study, the Machine Learning (ML) approach has been adopted using Random Forest (RF) model to estimate the CBR of the soil based on 10 input parameters such as Plasticity Index (PI), Liquid Limit (LL), Silt Clay content (SC), Fine Sand content (FS), Coarse sand content (CS), Optimum Water Content (OWC), Organic content (O), Plastic Limit (PL), Gravel content (G), and Maximum Dry Density (MDD), which can be easily determined in the laboratory.

14p viengfa 28-10-2024 5 2   Download

The results of this study would be useful in quickly and accurately predicting CPI to the management agencies, investors, construction contractors to pre-plan the construction investment costs. This will also help in suitably adjusting changing construction cost with time.

11p viengfa 28-10-2024 2 2   Download

Composting is a useful waste treatment for environmental problem, but composting experiment is challenging due to large-scale requirement. Thus, laboratory-scale reactor is of interest for composting experiment. The capability of laboratory-scale reactor to simulate large-scale composting was determined by assessing the quality of produced compost via germination index.

6p viling 11-10-2024 2 1   Download

This paper focuses on testing the applicability of various financial constraints measurements in the context of the Vietnamese market. Using a sample of non-financial quoted firms throughout 2010-2019; our paper contributes to current corporate finance literature with a novel and simple measurement of financial shortages that is effectively applicable for Vietnamese firms, namely the Age-size-cash flow- interest coverage index (ASCIC).

5p viling 11-10-2024 1 1   Download

This paper presents the results of water quality assessment of clam farming areas for 3 monitoring points in Tien Hai district, Thai Binh province. From the results of the assessment, this study suggests management measures, including improving water quality index used to zoning water quality, thus better managing clam areas; and technical measure which improves farming techniques to protect the aquatic environment of farmers.

11p vibecca 01-10-2024 4 1   Download

Heavy metals have big impacts on environmental quality and ecological risk. In this research, the Igeo accumulation index and ecological risk index (ERI) were used to assess the heavy metal pollution and ecological risk in the sediment of Cua Luc Bay, Quang Ninh Province.

9p vibecca 01-10-2024 2 2   Download

Can Gio Mangrove Biosphere Reserve provide many ecosystem services, such as provisioning, regulating, cultural, and supporting services for the urban areas as well as wildlife of suburban areas in Ho Chi Minh City and the nearby ecosystems. In this study, the Normalized Difference Vegetation Index - NDVI at 10 m resolution from 2015 to 2023 of Can Gio was obtained from the Copernicus Sentinel-2 database using Google Earth Engine - GEE.

14p vibecca 01-10-2024 2 1   Download

This paper introduces a methodology for generating an inundation map for rainy season and river network. To achieve this objective, we investigated the use of the recently developed Modified Normalized Difference Water Index (MNDWI) within the Google Earth Engine platform for extracting surface water.

11p vibecca 01-10-2024 1 1   Download

This paper presents some analysis results on workability, calculating relative stratification reduction and quality factor of LC when using Air Entrainment Admixture (AD) that most of experimental results presented on the referent.

5p vibecca 01-10-2024 0 0   Download

The trophic levels in urban lakes are typically based on the forms of nutrition and phytoplankton communities in the lakes. In this study, comparisons between eutrophication indices and the water quality index (VN-WQI) were used to classify the water quality of 20 lakes in Hanoi, Vietnam.

12p vibecca 01-10-2024 4 2   Download

This research was undertaken to determine the concentrations of heavy metal ions in the surface water and sediment in water bodies that receive wastewater from the Dinh Tram and Pho Noi A industrial zones. The pollution status of the heavy metal ions and their potential ecological risks were evaluated by using the potential ecological risk index (RI) and risk assessment code (RAC).

11p vibecca 01-10-2024 6 2   Download

In this study, the authors developed software named Sonar to analyze the progressive collapse of structural elements. This software is capable of assessing the level of damage to each structural component and automatically updating the structural model for subsequent analyses.

12p viyoko 01-10-2024 3 1   Download

In this study, for the purpose of utilizing waste gypsum, it was studied as the filler in blend of high density polyethylene (HDPE) and ethyelene vinyl acetated (EVA) with anti UV additives in order to improve the mechanical strength and lifespan of this composite.

5p vikwong 29-09-2024 2 1   Download

Expanding international cooperation relations is expected to bring many opportunities to the Vietnamese banking industry to develop and enhance its position in the world market. This empirical study used the Z-score index to measure bank stability, and impact factors (independent variables) were selected based on the CAMELS analytical framework.

13p viormkorn 27-09-2024 3 2   Download

A damage diagnosis method for trusses based on incomplete free vibration properties utilizing ensemble learning, e.g. Extreme gradient boosting (XGBoost), is presented in this work. Owing to the lack of measurement sensors, modal features are only measured at master degrees of freedom (DOFs) of a few first models instead of all DOFs of a structural system.

12p vifaye 20-09-2024 1 1   Download

According to statistical data of many countries in the wold, the more proportion of patients in hip replacement have, the more prosthetic infection have been treated. In Vietnam, treatment of prosthetic infection is often difficult beacause of antibiotic resistance, high cost treatment and difficult rehabilitation in post-surgery.

14p vifaye 20-09-2024 3 1   Download

Adolescence is vulnerable subjects and faces many risks that greatly impact their health and development in the future, but adolescents are not really getting the proper care from the health care system. This study aimed to examine the prevalence of health risk behaviours among adolescents in Thua Thien Hue Province, Vietnam, and to determine related factors to adolescents’ health risk behaviours.

8p vifaye 20-09-2024 2 1   Download

The aim was to evaluate the effectiveness of chronic periodontitis treatment using the diode laser method in Odonto - Stomatology Department of Friendship Hospital. Subjects and methods: Our study was a case-control clinical trial. Sixty patients were randomized into two groups. The group of controls 30 patients with chronic periodontitis who were treated with conventional procedures (cleaning and polishing).

6p viyoko 20-09-2024 2 1   Download