Search
Author
- Quan-Hoang Vuong (27)
- Anh-Tuan Le (17)
- Vuong QH (12)
- Anh D. Phan (11)
- next >
Subject
- Electrospinning (8)
- Nanoparticles (6)
- Compound droplet (5)
- Machine learning (5)
- next >
Date issued
- 2020 - 2022 (482)
- 2010 - 2019 (19)
- 2002 - 2009 (1)
Has File(s)
Search Results
Three major scientific policies implemented in 2008, 2014, and 2017 have pushed Vietnam’s social sciences and humanities (SSH) toward higher international standards. This study uses descriptive and Bayesian approaches on a dataset of 1,564 Vietnamese authors in the 2008–18 period to understand the changes under the new policies and the remaining challenges. The findings indicate that Economics is the most productive SSH field, with 858 publications in 11 years. Even though the number of authors has risen rapidly, gender disparity is still an issue. Economics has benefitted the most from Vietnam's development, and to a lesser extent, so have Education and Social Medicine. Future policies should aim to provide an enabling environment for female and early career researchers in every SS... |
Recently, Asia has emerged as a new hub of international students, apart from the traditional hosts such as North America, Europe or Australia. Along with this phenomenon, there has been increasing international education scholars selecting international student mobilities in Asia as objects of research. Nevertheless, there has not yet any systematic knowledge about the existing literature on international student mobilities in Asia-related studies. This project aims to fulfil this void by analyzing data obtained from Scopus dataset from 1984 to 2019. Using descriptive statistics as well as advanced bibliometric analyses, the review identified influential documents, topics, sources whose impact has been sustained for several decades. The review also identified prominent authors and ... |
Serpentinite-derived soils are characterized by low Ca/Mg ratio and abnormally high Cr and Ni concentrations due to the geogenic sources. The breakdown of parent materials during pedogenesis may lead to the changes in both Ca/Mg ratios and fractions of Cr and Ni. This study hypothesized that total Ca/Mg (Cat/Mgt) and exchangeable Ca/Mg (Cae/Mge) ratios increase with soil development, associated with the increases in potentially mobile fractions (PMFs) of Cr and Ni. Thirty-five soil horizon samples of eight pedons from Japan, Taiwan, Philippines, and Vietnam were collected, and the exchangeable concentrations of Ca and Mg were measured. |
This study’s aim is to improve the understanding of the dynamical behavior of a multi-core compound droplet traveling in an axisymmetric channel consisting of a diffuser element. The compound droplet typically consisting of two inner droplets distributed one after another is initially located at a certain distance from the entrance of the channel. A front-tracking method is used to handle the movement and deformation of the droplet. The numerical simulation results show that the compound droplet is stretched in the channel, and it takes a certain time, “the transit time”, to pass through the diffuser. The compound droplet has the largest deformation in the diffuser region and tends to return to its nearly original shape after leaving the diffuser. The deformation and transit time of... |
Functionally graded materials (FGMs) are increasingly used in sandwich construction to improve mechanical performance of structures. The effective material properties used in modelling FGM structures, however, are dependent on a chosen homogenization scheme. For the first time, the influence of different homogenization schemes on large deflections of dual-phase FGM sandwich beams is studied in this paper by using a nonlinear finite element procedure. |
Silver nanowire (AgNW) networks are among the most promising indium-free, flexible transparent electrodes for energy, lighting and heating devices. However, the lack of stability of such networks is a key factor that limits their industrial application. While applications require homogeneous networks, non-homogeneous AgNW networks are intentionally prepared in the present work to probe the mechanisms leading to failure under electrical stress. We show that induced non-homogeneities have a strong impact both on the spatial distribution of temperature (measured by IR imaging) and the current density throughout the electrode (as deduced from modeling). Regions with higher current density under elevated electrical stress are correlated to the origin of degradation. Furthermore, the infl... |
The objective of this review is to evaluate the anti-dementia activities of saffron and its combination with Kampo medicine. The Kampo formula Kamiuntanto composed of 13 crude drugs is well known for its anti-dementia activity. A significant increase in choline acetyltransferase activity and mRNA levels were observed. Polygala radix was identified as the most essential component drug in Kamiuntanto, probably due to the saponins, tenuifolin, and sinapinic acid. Ginseng was also identified as an essential Kamiuntanto component in terms of its synergistic functions with Polygala radix. Saffron, which was recommended in the Bencao Gangmu for memory and dementia, and is used as an anti-spasmodic, anti-catarrhal, and sedative herbal drug. Saffron and its major constituent, crocin were sho... |
In this paper, we numerically investigate the dynamics of a compound droplet driven by surface tension variation induced by a thermal gradient in a sinusoidal constriction tube. Initially, the compound droplet with a concentric inner core is spherical and placed in the constriction's upstream region at a low temperature. As time progresses, it migrates downstream with a high temperature. Due to the constriction, the droplet is slowed down in the upstream region and accelerated again right after passing the constriction. This acceleration maximizes the eccentricity. However, the constriction results in an increase in the maximum eccentricity when increasing its depth to a value corresponding to the size of the tube neck, which is greater than or equal to the droplet size. Effects of ... |
The participation of women in Vietnam's social sciences and humanities research has increased during the last several decades. However, they still face various challenges, such as the 'glass ceiling', social stereotypes, low recognition, and underrepresentation. The open-access (OA) movement, being advocated for connecting science and community and improving scientists' visibility, offers a viable platform to increase participation of female researchers. This research investigated participation of Vietnamese women in 3,122 Social Sciences & Humanities publications during 2008�2019. Results show a rapid increase in female authors during the period, rising from 47.27% to 71.43% of articles having one or more Vietnamese female author. However, the number of women as first authors remai... |
The turbine shaft is an important part of the turbocharger structure. This part requires quite high hardness, especially when operating it needs high strength to ensure the working conditions with very high speed, pressure and temperature. This paper presents the research results of the effects of temperature and heat retention time at high tempering on the hardness and tensile strength of the turbine shaft in the HX40W model turbocharger structure made of 42CrMo steel. |
