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To evaluate exercise capacity using the 1-minute sit-to-stand test (1MSTST) and investigate factors related to the results of the 1MSTST in patients with chronic obstructive pulmonary disease (COPD). Methods: A cross-sectional study was conducted on 61 stable COPD patients being hospitalized at Hue University of Medicine and Pharmacy Hospital. Clinical characteristics were collected, and the 1MSTST was performed. The data were analyzed to study factors related to the results of the 1MSTST.

8p vihizuzen 26-05-2025 3 1   Download

Currently, permanent magnet synchronous motors with on-line starting are being increasingly researched and applied to partialy replace squirrel cage asynchronous motors, which are commonly used. The reason is that these motors have many advantages such as high efficiency, and high power factor value, stable speed, higher power density compared to induction motors, and the ability to self-start.

7p vijiraiya 19-05-2025 3 1   Download

Teeth displaced from their alveolar bone can be replanted if properly handled and stored in suitable environments. To help minimize the failure of reimplantation, teeth should be preserved in a storage environment that is initially free of bacteria. Research objective: Evaluating the morphology of bacteria on the periodontal ligament cells in different storage environments at various time points after the teeth have been removed from the alveolar bone using Gram staining.

6p vijiraiya 19-05-2025 2 1   Download

This article presents an overview of Stream Algebra, a research field that has emerged after the birth of Relational Algebra used in Database Management Systems (DBMS). When Stream Data appeared and needed to be processed in real-time, the role of Stream Algebra became evident. Since the rise of Big Data, this field has received attention in recent years, the role of Stream Algebra has been further demonstrated.

7p visarada 28-04-2025 1 1   Download

lectric Arc Furnace Dust (EAFD) and wasted glass are two types of waste in industry and daily life, so they must be recycled to recover some useful elements. The production of colored glass is one of the methods used to recycle the electric arc furnace dust to take advantage of the coloring element in the dust. To use this colored glass for decoration, it is also necessary to test its durability. The present study focuses on the properties of colored glass when using electric furnace dust.

6p visarada 28-04-2025 2 1   Download

It is undeniable that during the learning journey in colleges and universities, along with the intense pressure of academic tasks and family commitments, undergraduates can be exposed to exacerbation and diagnoses of mental health problems, which may lead to their failure in learning performance and world view perception.

12p vifilm 11-10-2024 4 1   Download

Through the process of analysing related documents and object characteristics in FMCG companies, paper aim to build vehicle roung with me window (CVRTW) model to optimize the delivering process, thus satisfying customer demand. To ensure the quality of the results, the model will be solved using the simulated annealing algorithm (SAalgorithm).

8p vifilm 11-10-2024 1 0   Download

In this paper, we build a quadcopter for target tracking by integrating a embedded computer Raspberry Pi (RPI) with a Pixhawk flight controller. This article also proposes a lightweight Tracking algorithm that can be deployed on Raspberry Pi, this algorithm harnesses advanced image processing and computing capabilities to significantly enhance target tracking performance, thereby reducing the need for human intervention control in unmanned flights.

9p viengfa 28-10-2024 4 3   Download

This article presents a comprehensive assessment of self-esteem and well-being among high school students in Ho Chi Minh City using a questionnaire interview method. A 5- point Likert scale was employed to evaluate the perceptions of self-esteem and wellbeing.

8p viengfa 28-10-2024 1 1   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

The aim of this paper is to find the appropriate mix-design for creating self-healing cementitious material in Vietnam conditions. Experimental results show that the mixture including bacillus subtilis and calcium lactate can be used for creating the self-healing cementitious materials.

8p viengfa 28-10-2024 5 2   Download

This paper presents the results of applying the Artificial Neural Network (ANN) model in determining pile bearing capacity. The traditional methods used to calculate the bearing capacity of piles still have many disadvantages that need to be overcome such as high cost, complicated calculation, time-consuming.

8p viengfa 28-10-2024 5 2   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 7 2   Download

The samples were synthesized in two steps containing the photochemical reduction and galvanic replacement reaction using silver nanodecahedra as a sacrificial template to obtain hollow silver-gold alloy nanoshells. The dimension of the hollow cavities can be controlled by varying the amount of HAuCl4. The prepared Ag/Au decahedra can be applied to the SERS analysis.

12p vimitsuki 30-03-2025 2 1   Download

This research was conducted at a public university in Vietnam where project-based learning (PBL) has been integrated into various courses. Notably, this marks only the second instance of PBL being used in a blended learning format, an area that remains underexplored. The study seeks to examine both students' and teachers' perceptions of the effects of PBL, specifically through the implementation of a Magazine Project within a blended translation course.

10p viyuhi 26-03-2025 5 1   Download

This study aims to examine some key aspects of euphemism, including their functions and characteristics, as well as illustrate typical situations where euphemisms may be used to avoid taboo topics.

6p viyuhi 26-03-2025 1 0   Download

The auxiliary parts of the impact test hammer are only suitable for certain cases. The impact velocity of other cases are determined by measuring. Instead of measuring multiple times, the hammer velocity calculating method and program is suggested by this article for general cases and the input parameters will be changed for the other cases. The calculation results are verified by using a high speed camera to measure the hammer velocity.

9p viyuhi 26-03-2025 6 1   Download

Social media is integral to modern life, particularly for adolescents who spend considerable time online. However, excessive use poses significant risks to well-being, especially among adolescents who are vulnerable to compulsive social media usage. This study examines factors contributing to social media addiction among Vietnamese adolescents using the Bergen Social Media Addiction Scale (BSMAS) and the Online Fear of Missing Out Inventory (On-FoMO).

11p viyuhi 26-03-2025 6 1   Download

Stictic acid, a depsidone in many lichen species, is a potentially bioactive compound. Derivatives of stictic acid were synthesised by halogenation or esterification. However, the effects of these conditions on the decomposition of stictic acid have yet to be studied. Hence, the modification of stictic acid was investigated using an AlCl3 catalyst and dimethylformamide solvent.

8p viaburame 14-03-2025 3 1   Download

This paper discusses the changes in classroom instructions due to technology over the years in mathematics education, and how these changes have impacted mathematics learning and teaching. The impact on learning can be seen over a few phases in Singapore: The use of scientific and graphing calculators has allowed the focus on the developing of higher-order thinking skills, while at the same time de-emphasizing routine computation.

17p viaburame 14-03-2025 4 1   Download