The obtained results

This paper aimed at investigating teachers’ perceptions in promoting LA in language teaching and learning in online language classes, specifically at International School, Vietnam National University, Hanoi. In-depth interviews were conducted for 7 teachers and the results were obtained via thematic analysis.

7p vipanly 28-10-2024 0 0   Download

This study was conducted with the hope that from the results obtained, we can evaluate the online teaching capacity of high school English teachers in Hai Duong province in terms of TPACK (Technological Pedagogical Content Knowledge) and investigate the challenges that teachers are facing.

7p viengfa 28-10-2024 0 0   Download

This study focuses on evaluating short-term deflections of reinforced concrete beams according to the Vietnamese Standard on the Design of Concrete and Reinforced Concrete Structures (TCVN 5574:2018) by comparing them with simulated results obtained from Abaqus software.

9p viengfa 28-10-2024 0 0   Download

In this paper, three conformal cooling channel designs are proposed for obtaining uniform cooling over the molded parts. The research is conducted by using CAE software (MOLDEX 3D) to simulate the injection process and compare the results of three conformal cooling channel designs with molded part cooling by moldbase.

8p vifilm 11-10-2024 0 0   Download

The results of using machine learning via genetic programming (GP) to automatically generate novel effective length factor formula in accordance with AISC standard are presented in this article. The data points obtained from applying the numerical method equation solving for the transcendental equation for the effective length of the braced frame were fed into the machine learning algorithm.

5p vibecca 01-10-2024 3 1   Download

In this study, we investigated the influence of blade shapes on the aerodynamic noise characteristics of helicopter main rotors by the vortex method. The obtained results are the variation of the time-dependent lift coefficient of rotors and the aerodynamic noise characteristics of the helicopter rotor with different blade shapes.

15p viyoko 01-10-2024 6 1   Download

For the first time, the expansion grade of graphite was studied through the effect of the flake size. The result shown the larger flake size exhibits a higher expansion grade. In addition, the more expanded material, the higher specific surface area can be obtained. The synthesized expanded graphites were used for the adsorption of methylene blue.

5p vikwong 29-09-2024 6 1   Download

This study focuses on the synthesis of V-doped TiO2 materials using a modified polyol method to enhance their efficiency. The obtained materials were characterized by various methods such as XRD, EDX, FTIR, SEM, TEMSAED, Raman, and UV-Vis DRS. The results indicated the crystalline anatase phase of TiO2, with spherical morphology and an average size of 30nm. The UV-DRS measurement demonstrated that doped materials have a lower bandgap than the pristine TiO2.

6p vikwong 29-09-2024 1 1   Download

The paper analyzes and determines the optimal parameters of tuned mass damper to reduce torsional vibration for the machine shaft. The research steps are as follows. First, the optimal parameters of tuned mass damper for the shafts are given by using the maximization of equivalent viscous resistance method. Second, a numerical simulation is performed for configuration of machine shaft to validate the effectiveness of the obtained analytical results.

9p vifilm 24-09-2024 1 1   Download

This paper presents the elastic large-displacement analysis of planar steel frames with flexible connections under static loads. The obtained numerical results are compared with those from previous studies to prove the effectiveness and reliability of the proposed element and program.

10p vifilm 24-09-2024 4 1   Download

he study is conducted to identify potential applications and to outline the relationships among these applications to develop the use of blockchain in developing agricultural supply chains. The study applies both qualitative and quantitative research methods. First, by referencing current literature and combining in-depth interviews with experts, the research has identified 20 potential blockchain applications for agricultural supply chains. Next, the study obtained remarkable results by surveying 225 individuals/organizations involved in Hue's Melaleuca oil supply chain.

20p toduongg 24-08-2024 2 2   Download

This paper describes an investigation of fluid flow through two tandem circular cylinders using Lattice-Boltzmann Method in direct numerical simulation. The diameter ratio of two circular cylinders, D1/D2 varies from 0.5 to 1.5, and spacing ratio (L/D2) varies from 1.5 to 10, whereas the Reynolds number of 100 is considered. The numerical model is well validated by comparing the results with those obtained in the literature.

8p dathienlang1012 03-05-2024 6 1   Download

In this work, a new sulfated polysaccharide was isolated from green seaweed Caulerpa racemosa harvested at Nha Trang sea. The structure of obtained polysaccharide was determined and its cytotoxic activity was evaluated. The results showed that structure of the polysaccharide has a main chain of (1→4)-β-D-galactopyranose residues and branches are (1→3)-α-L-glucopyranose-2,4-disulfate residues linked to the main chain at C-6 position.

6p dianmotminh02 03-05-2024 9 2   Download

The present paper is focused on the impact of the dissolution mechanism of the different species (formed within a single bubble) on bubble chemistry. This process is analyzed on a range of ultrasound frequencies from 140 to 515 kHz, at an acoustic intensity of 1 W/cm². The obtained findings are compared to the results available in the literature.

14p dianmotminh02 03-05-2024 7 2   Download

The study was conducted a year (July 2017-July 2018) in Gorontalo Province. Data were obtained from direct interviews with farmers, collectors, wholesalers, retailers. Data analysis utilized DEA (Data Envelopment Analysis). The results showed that the performance of the cayenne supply chain doer in Gorontalo was mostly efficient, only 16.7% farmers, 10% collecting trader, 8.3% large trader and 16.7% retailers whose performance was not efficient.

7p longtimenosee10 26-04-2024 6 3   Download

This paper examines the types of fraud in the financial affairs of public corporations and the way they deal with them and ultimately the right to judicial review. The results of the investigations showed that after proving any crime and issuing a lower court judgment, there is a right for the offender to seek authority from the authorities in order to obtain a reduction in the punishment. The multiplicity of judicial procedures is a mechanism and tool for correcting a mistake or probable judicial error.

4p longtimenosee10 26-04-2024 9 2   Download

In the course of current research the procedure of obtaining of the piecewise linear vibration systems time and frequency responses have been developed. The method is partly analytical and partly numerical and is based on combining of linear solutions of different sections in a cycle of motion. In a row with the method of obtaining of the exact steady state time and frequency response, also it is provided sensitivity analysis of the vibration isolator.

86p runthenight07 01-03-2023 8 3   Download

The objective of this research was to determine the role of neural feedback and muscle mechanics in the generation of physiological tremor oscillation. This research developed a neuromuscular model to simulate the individual and resulting oscillatory mechanisms of tremor. The oscillations found in EMG signal were also analysed empirically from EMG data from 54 subjects using Hilbert Transform and rectification to obtain the envelope of the signal. The time between rhythmical waveform patterns in the EMG signal, TC was found to be 78ms.

117p runthenight07 01-03-2023 6 3   Download

In present paper "Equation of state and thermal expansion of metals with FCC structure: Application to Cu, Al and Ni", by the statistical moment method (SMM) we obtain the equation of state for metals with cubic structure at temperature 0 K and pressure P and from that obtain the expressions of lattice parameter and thermal expansion coefficient for these metals at temperature T and pressure P.

6p runordie3 27-06-2022 13 2   Download

In the paper "Experimental and theoretical studies on the composite composed of graphene oxide and polyaniline", we report theoretical and experimental results on graphene oxide – polyaniline composites. Experimental results in this study were obtained by using different techniques: X-ray diffraction (XRD), Scanning electron microscope (SEM) and from cyclic voltammetry. The theoretical results were acquired using method of density functional theory (DFT).

5p runordie3 27-06-2022 14 3   Download