Ma đè

This research delves into the typical grammatical mistakes made by Vietnamese students when writing in English, with the goal of revealing the particular linguistic difficulties they encounter. Carried out with 57 first-year students with diverse majors at a university in Vietnam, the study examines various levels of English skills, spanning from novice to expert.

8p vipanly 28-10-2024 1 0   Download

Folding plates with wavy shapes made of composite materials have been widely applied, hence designing this type of structure is significant in practice. In this research work, the results of static calculation of the sinusoidal corrugated composite plates will be analyzed.

9p viengfa 28-10-2024 0 0   Download

This study also contributes to reducing environmental pollution caused by plastic and glass waste as well as current construction brick production methods. The results show that the bulk density, compressive strength, and bending strength of brick samples made from PET plastic and glass waste are higher than those of burnt clay brick samples, while water absorption is much smaller than that of burnt clay brick samples.

8p viengfa 28-10-2024 0 0   Download

The present research develops soybean curd biochar loading goethite (SBCG) and soybean curd activated carbon loading goethite (SACG), a magnetic material made from soybean curd residue and Fe precursor (α-FeOOH), for advanced oxidation processes (AOPs) of TCH in aqueous solutions.

9p viling 11-10-2024 0 0   Download

This case study presents a patient with SCA from the right aortic sinus with severe stenosis proximal and distal part of right coronary artery was made using cardiac angiography and cardiac multidetector computed tomography (MDCT) with acute myocardial infarction.

4p viling 11-10-2024 1 0   Download

Traffic control decisions for incident congestion management on expressways are often made in the face of uncertainty because it entails using many forms of both current and predicted traffic data and incident information to arrive at control decisions under critical-time pressure.

16p vibecca 01-10-2024 0 0   Download

In recent years, the prediction of the effective transport properties have received a great number of investigations. The present work is dedicated to determining the effective permeability of two-dimensional (2D) doubly porous materials made of an isotropic permeable solid matrix in which elliptical shaped pores of any size are embedded.

10p vibecca 01-10-2024 0 0   Download

The present study is going to fill in the gap by performing a review on the typical standard equations for the moment modification factors of simply supported beams and fixed beams subjected to an arbitrary point load. Also, a detail comparison between the equations will be discussed and key warnings will be made.

10p vibecca 01-10-2024 0 0   Download

In this study, we focused on the fact that the water content of embankment materials made of slaking materials such as mudstone increases as the materials become finer due to slaking, and confirmed the effect of the increase in water content on strength behavior by experiments.

4p vibecca 01-10-2024 0 0   Download

Aquaculture production in China has made large contributions to the global total volume of fish for human consumption. The developed mariculture fish species large yellow croaker (Pseudosciaena crocea) is the highest economic marine fish of China. The paper aims to underpin the most significant investigations and highlight the future prospects for the LYC aquaculture industry in China.

15p vibecca 01-10-2024 4 1   Download

In this study, the experiments were conducted in various heating temperatures, holding times and cooling mediums for specimens made of S45C steel. Then, the relationship between the microstructure and the hardness of the steel was examined.

10p vibecca 01-10-2024 1 1   Download

Phase change materials have excellent thermal energy storage capacity, making them an appealing option for energy management applications. Stabilizing the form of phase change materials enhances their practical effectiveness. This research focuses on sustaining the shape of low molecular weight PEG phase change materials in wood structures made from natural balsa wood.

6p vikwong 29-09-2024 1 1   Download

This study presents a series of soil concrete mix that is made of excavated soils, cement, lime and hemp fibers. An experimental program was carried out on the testing samples of soil concrete with different proportions of clayey soil and hemp fibers.

12p vifilm 24-09-2024 1 1   Download

The most rigorous effective medium approximations for elastic moduli are elaborated for matrix composites made from an isotropic continuous matrix and isotropic inclusions associated with simple shapes such as circles or spheres. In this paper, we focus specially on the effective elastic moduli of the heterogeneous composites with arbitrary inclusion shapes.

13p vifilm 24-09-2024 2 1   Download

In this paper, free vibration of bidirectional functionally graded sandwich (BFGSW) beams is studied by using a finite element formulation. The beams made from three distinct materials are composed of three layers, a homogeneous core and two bidirectional FGM face layers with material properties varying in both the thickness and longitudinal directions by power gradation laws.

15p vifilm 24-09-2024 2 1   Download

The paper investigates the flexural performance of reinforced concrete beams in which fly ash from Vinh Tan power station was used to replace original Portland cement in the proportions of 0%, 10%, 20% and 40% by weight.

13p vifilm 24-09-2024 1 1   Download

The ultimate aim of this study is to use experimental work for evaluating the modulus of elasticity (MOE) of Geopolymer concrete (GPC) using marine sand as fine aggregate and seawater for the mix. Four different groups of concrete mixtures, namely CP1a, CP1b, CP2a, CP2b were identified.

9p vifilm 24-09-2024 2 1   Download

This paper deals with the free vibration and dynamic responses of composite sandwich plates. The sandwich plate has three layers in which two face sheets are made of isotropic material, and the core layer is made of auxetic honeycomb structures with a negative Poisson’s ratio.

14p vifilm 24-09-2024 3 1   Download

The objective of this study was to explore a non-analytical but empirical and mathematical method for the determination of pore size and pore density of several polymeric tailor-made membranes. The proposed method used the fractional rejection concept of solute in membrane pores.

6p viyoko 24-09-2024 1 1   Download

In this study, the ultimate bending moment of circular concrete-filled double skin steel tubes (CFDSTs) was investigated. A CFDSTs made of two concentric circular steel tubes with concrete infill and M16 shear connector system was fabricated.

12p viyoko 24-09-2024 5 1   Download