Dang Minh XA - Academia.edu (original) (raw)

Papers by Dang Minh XA

Earth Systems and Environment

The Third International Tropical Agriculture Conference (TROPAG 2019), 2019

Artificial Intelligence Review, 2021

Sustainable Development of Mountain Territories, 2021

Flood is represented as one of the most destructive natural hazards to humankind. Assessing and p... more Flood is represented as one of the most destructive natural hazards to humankind. Assessing and predicting floods hazard is necessary to offer appropriate solutions for flood mitigation and sustainable environmental management. It is only possible when the main criteria that contributed to creating the flood hazard are pointed out. The purpose of the current research was to choose and attribute scores to all various flood-causing factors in the Lam river basin. Firstly, the Delphi method was applied to the expertbased survey to choose six key parameters that led to the floods, including rainfall, slope, relative slope length, drainage density, land cover, and soil. Then, Analytic Hierarchy Process (AHP) approach is employed as an effective tool to obtain a better understanding of all the factors or indicator contributions in the flood process based on weight given to each of six flood influencing elements. The consistency analyses revealed that the findings were coherent and consist...

Sustainable Development of Mountain Territories, 2021

Floods are considered to be one of the most costly natural hazards in the Lam river basin causing... more Floods are considered to be one of the most costly natural hazards in the Lam river basin causing infrastructure damages as well as devastating the affected area and relatively high death toll. So prevention is necessary for shielding lives and properties. The flood management on the Lam River basin has been considering for many years to minimize damages caused by flooding. The flood hazard zoning map is one of the indispensable tools to provide information about hazard and risk levels in a particular area and to perform the necessary preventive and preparedness procedures. The multicriteria decision analysis based on geographic information systems is used to build a flood hazard map of the study area. The analytic hierarchy process is applied to extract the weights of six criteria affecting the areas where are prone to flooding hazards, including rainfall, slope, relative slope length, soil, land cover, and drainage density. The results showed in 91.32 % (20103.83 km2) of the basin...

Journal of Southwest Jiaotong University, 2020

There are many factors that influence the formation and development of floods, such as rainfall, ... more There are many factors that influence the formation and development of floods, such as rainfall, soil, slope, land cover, drainage, and density. Therefore, a quantitative assessment of their importance is necessary, especially in the determination of flood risk zones, using the Analytic Hierarchy Process algorithm and Geographic Information System. In comparison with other methodologies, an obvious advantage of Analytic Hierarchy Process is the ability to solve multi-variable qualitative and quantitative problems with precise and trustworthy results. This paper presents the application of the Analytic Hierarchy Process algorithm in analyzing and evaluating the level at which various criteria affect flood risk in the Lam River basin. Some of the flood-causative factors considered in this paper are annual rainfall, soil, slope, land cover, drainage density, and relative slope length. These factors were chosen based on the physical conditions of the study area. The research results are...

Agronomy, 2020

Soil salinity may damage crop production. Besides proper management of irrigation water, salinity... more Soil salinity may damage crop production. Besides proper management of irrigation water, salinity reduction can be achieved through soil amendment. The objectives of this study were to evaluate the effects of rice husk biochar and compost amendments on alleviation of salinity and rice growth. Field experiments were conducted at two salt-affected paddy rice fields located in distinct sites for five continuous crops. Treatments, with four replicates, consisted of continuous three rice crops per year (RRR), two rice crops rotated with fallow in spring–summer crop (FRR), FRR plus compost at 3 Mg ha−1 crop−1 (FRR + Comp), and biochar at 10 Mg ha−1 crop−1 (FRR + BC). Salt contents and hydraulic properties of soils, plant biomass, and plant uptake of cations were investigated. Soil bulk density (BD), exchangeable sodium (Na+), and exchangeable sodium percentage (ESP) were reduced remarkably by biochar application. Biochar application significantly increased other soil properties including ...

Agronomy, 2021

Avoidance of intensive rice cultivation (IRC) and soil amendments are potential practices to enha... more Avoidance of intensive rice cultivation (IRC) and soil amendments are potential practices to enhance soil properties. There is only limited information on the effects of reduced IRC and its mixture with compost or silicate fertilizer (Si) on the soil nematode community in salt–affected soils. This study aimed to assess the shifts of soil nematode community by reducing a rice crop from triple rice system (RRR) to a double rice system and mixed with compost or Si in paddy fields in acid sulfate soil (ASS) and alluvial soil (AL) in the Mekong Delta, Vietnam. Field experiments were designed with four treatments in four replicates, including RRR and a proposed system of double–rice followed by a fallow (FRR) and with 3 Mg ha–1 crop−1 compost or 100 kg ha–1 crop−1 Si. Soils were collected at harvest after the 2 year experiment, reflecting the fifth and third consecutive rice crop in RRR and FRR system, respectively. Results showed that reduced IRC gave a significant reduction in abundance...

VNU Journal of Science: Education Research, 2020

Background: Mental illness is a global public health challenge, particularly in low- and middle-i... more Background: Mental illness is a global public health challenge, particularly in low- and middle-income countries such as Vietnam. Improving mental health literacy was found to be associated with early detection and treatment of mental illness and increased help-seeking behaviors. With the development of information technology, IT applications such as websites and mobile applications have become essential tools for mental health literacy intervention. Though there has been a number of mobile apps delivering psychotherpies, little focus on mental health litracy intervention. Aims: The study aims to a) evaluate the feasibility of a mobile-based mental health literacy intervention called Shining Mind and b) assess the effectiveness of the Shining Mind app in improving mental health literacy among college students. Methods: The study used randomized control trial design with two groups: experimental group (N=68) and control group (N=84). Results: The average number of times of accessin...

Soil Research, 2017

Different sampling times for greenhouse gas measurements have been proposed in many incubation st... more Different sampling times for greenhouse gas measurements have been proposed in many incubation studies. Little is known about effects of closure time on denitrification and nitrification rates from incubation experiments. The objectives of this study were to analyse greenhouse gas (carbon dioxide, methane and nitrous oxide) production from different soils with different times of lid closure and to assess effects of different activation times (defined as additional pre-incubation periods before incubation experiments) on gas emissions from soils. Forty grams of air-dried soil samples (depth 0–10 cm) were incubated in 125-mL jars at 25°C with the addition of glucose and nitrate. The first experiment measured greenhouse gas fluxes at different lid-closure times (40, 80, 120 and 1440 min). The second experiment assessed the effects of different durations of soil activation (0.7, 1.3, 2 and 24 h) on gas emissions. Both were conducted with a completely randomised design, with three replic...

Grid Computing - Technology and Applications, Widespread Coverage and New Horizons, 2012

Journal of Environmental Protection, 2013

Environmental Earth Sciences, 2011

Perovskite compounds La_0.7Sr_0.3Mn_1-xCo_xO3 ( x=0, 0.02, 0.04, 0.06, 0.08, 0.1 , 0.15, 0.2, 0.3... more Perovskite compounds La_0.7Sr_0.3Mn_1-xCo_xO3 ( x=0, 0.02, 0.04, 0.06, 0.08, 0.1 , 0.15, 0.2, 0.3, 0.4 ) were prepared by the solid state reaction method. Structural, magnetic and electrical properties of samples were studied. It was shown that with the cobalt substitution the Metal to Insulator Transition disappeared at x near 0.2 and these compounds demonstrated a high-temperature spin-glass-like (SGL) behavior.

Physica B: Condensed Matter, 2003

Pediatric Nephrology, 1999

Journal of Magnetism and Magnetic Materials, 2002

Structural, magnetic and magnetocaloric studies on La1− xSrxCoO3 (0.20⩽ x⩽ 0.50) were reported. T... more Structural, magnetic and magnetocaloric studies on La1− xSrxCoO3 (0.20⩽ x⩽ 0.50) were reported. The crystal structure of the samples is rhombohedral with x= 0.20–0.45 and is cubic with x= 0.50. Magnetization, Curie temperature (Tc) and maximum magnetic-entropy ...

Journal of Magnetism and Magnetic Materials, 2006

Earth Systems and Environment

The Third International Tropical Agriculture Conference (TROPAG 2019), 2019

Artificial Intelligence Review, 2021

Sustainable Development of Mountain Territories, 2021

Flood is represented as one of the most destructive natural hazards to humankind. Assessing and p... more Flood is represented as one of the most destructive natural hazards to humankind. Assessing and predicting floods hazard is necessary to offer appropriate solutions for flood mitigation and sustainable environmental management. It is only possible when the main criteria that contributed to creating the flood hazard are pointed out. The purpose of the current research was to choose and attribute scores to all various flood-causing factors in the Lam river basin. Firstly, the Delphi method was applied to the expertbased survey to choose six key parameters that led to the floods, including rainfall, slope, relative slope length, drainage density, land cover, and soil. Then, Analytic Hierarchy Process (AHP) approach is employed as an effective tool to obtain a better understanding of all the factors or indicator contributions in the flood process based on weight given to each of six flood influencing elements. The consistency analyses revealed that the findings were coherent and consist...

Sustainable Development of Mountain Territories, 2021

Floods are considered to be one of the most costly natural hazards in the Lam river basin causing... more Floods are considered to be one of the most costly natural hazards in the Lam river basin causing infrastructure damages as well as devastating the affected area and relatively high death toll. So prevention is necessary for shielding lives and properties. The flood management on the Lam River basin has been considering for many years to minimize damages caused by flooding. The flood hazard zoning map is one of the indispensable tools to provide information about hazard and risk levels in a particular area and to perform the necessary preventive and preparedness procedures. The multicriteria decision analysis based on geographic information systems is used to build a flood hazard map of the study area. The analytic hierarchy process is applied to extract the weights of six criteria affecting the areas where are prone to flooding hazards, including rainfall, slope, relative slope length, soil, land cover, and drainage density. The results showed in 91.32 % (20103.83 km2) of the basin...

Journal of Southwest Jiaotong University, 2020

There are many factors that influence the formation and development of floods, such as rainfall, ... more There are many factors that influence the formation and development of floods, such as rainfall, soil, slope, land cover, drainage, and density. Therefore, a quantitative assessment of their importance is necessary, especially in the determination of flood risk zones, using the Analytic Hierarchy Process algorithm and Geographic Information System. In comparison with other methodologies, an obvious advantage of Analytic Hierarchy Process is the ability to solve multi-variable qualitative and quantitative problems with precise and trustworthy results. This paper presents the application of the Analytic Hierarchy Process algorithm in analyzing and evaluating the level at which various criteria affect flood risk in the Lam River basin. Some of the flood-causative factors considered in this paper are annual rainfall, soil, slope, land cover, drainage density, and relative slope length. These factors were chosen based on the physical conditions of the study area. The research results are...

Agronomy, 2020

Soil salinity may damage crop production. Besides proper management of irrigation water, salinity... more Soil salinity may damage crop production. Besides proper management of irrigation water, salinity reduction can be achieved through soil amendment. The objectives of this study were to evaluate the effects of rice husk biochar and compost amendments on alleviation of salinity and rice growth. Field experiments were conducted at two salt-affected paddy rice fields located in distinct sites for five continuous crops. Treatments, with four replicates, consisted of continuous three rice crops per year (RRR), two rice crops rotated with fallow in spring–summer crop (FRR), FRR plus compost at 3 Mg ha−1 crop−1 (FRR + Comp), and biochar at 10 Mg ha−1 crop−1 (FRR + BC). Salt contents and hydraulic properties of soils, plant biomass, and plant uptake of cations were investigated. Soil bulk density (BD), exchangeable sodium (Na+), and exchangeable sodium percentage (ESP) were reduced remarkably by biochar application. Biochar application significantly increased other soil properties including ...

Agronomy, 2021

Avoidance of intensive rice cultivation (IRC) and soil amendments are potential practices to enha... more Avoidance of intensive rice cultivation (IRC) and soil amendments are potential practices to enhance soil properties. There is only limited information on the effects of reduced IRC and its mixture with compost or silicate fertilizer (Si) on the soil nematode community in salt–affected soils. This study aimed to assess the shifts of soil nematode community by reducing a rice crop from triple rice system (RRR) to a double rice system and mixed with compost or Si in paddy fields in acid sulfate soil (ASS) and alluvial soil (AL) in the Mekong Delta, Vietnam. Field experiments were designed with four treatments in four replicates, including RRR and a proposed system of double–rice followed by a fallow (FRR) and with 3 Mg ha–1 crop−1 compost or 100 kg ha–1 crop−1 Si. Soils were collected at harvest after the 2 year experiment, reflecting the fifth and third consecutive rice crop in RRR and FRR system, respectively. Results showed that reduced IRC gave a significant reduction in abundance...

VNU Journal of Science: Education Research, 2020

Background: Mental illness is a global public health challenge, particularly in low- and middle-i... more Background: Mental illness is a global public health challenge, particularly in low- and middle-income countries such as Vietnam. Improving mental health literacy was found to be associated with early detection and treatment of mental illness and increased help-seeking behaviors. With the development of information technology, IT applications such as websites and mobile applications have become essential tools for mental health literacy intervention. Though there has been a number of mobile apps delivering psychotherpies, little focus on mental health litracy intervention. Aims: The study aims to a) evaluate the feasibility of a mobile-based mental health literacy intervention called Shining Mind and b) assess the effectiveness of the Shining Mind app in improving mental health literacy among college students. Methods: The study used randomized control trial design with two groups: experimental group (N=68) and control group (N=84). Results: The average number of times of accessin...

Soil Research, 2017

Different sampling times for greenhouse gas measurements have been proposed in many incubation st... more Different sampling times for greenhouse gas measurements have been proposed in many incubation studies. Little is known about effects of closure time on denitrification and nitrification rates from incubation experiments. The objectives of this study were to analyse greenhouse gas (carbon dioxide, methane and nitrous oxide) production from different soils with different times of lid closure and to assess effects of different activation times (defined as additional pre-incubation periods before incubation experiments) on gas emissions from soils. Forty grams of air-dried soil samples (depth 0–10 cm) were incubated in 125-mL jars at 25°C with the addition of glucose and nitrate. The first experiment measured greenhouse gas fluxes at different lid-closure times (40, 80, 120 and 1440 min). The second experiment assessed the effects of different durations of soil activation (0.7, 1.3, 2 and 24 h) on gas emissions. Both were conducted with a completely randomised design, with three replic...

Grid Computing - Technology and Applications, Widespread Coverage and New Horizons, 2012

Journal of Environmental Protection, 2013

Environmental Earth Sciences, 2011

Perovskite compounds La_0.7Sr_0.3Mn_1-xCo_xO3 ( x=0, 0.02, 0.04, 0.06, 0.08, 0.1 , 0.15, 0.2, 0.3... more Perovskite compounds La_0.7Sr_0.3Mn_1-xCo_xO3 ( x=0, 0.02, 0.04, 0.06, 0.08, 0.1 , 0.15, 0.2, 0.3, 0.4 ) were prepared by the solid state reaction method. Structural, magnetic and electrical properties of samples were studied. It was shown that with the cobalt substitution the Metal to Insulator Transition disappeared at x near 0.2 and these compounds demonstrated a high-temperature spin-glass-like (SGL) behavior.

Physica B: Condensed Matter, 2003

Pediatric Nephrology, 1999

Journal of Magnetism and Magnetic Materials, 2002

Structural, magnetic and magnetocaloric studies on La1− xSrxCoO3 (0.20⩽ x⩽ 0.50) were reported. T... more Structural, magnetic and magnetocaloric studies on La1− xSrxCoO3 (0.20⩽ x⩽ 0.50) were reported. The crystal structure of the samples is rhombohedral with x= 0.20–0.45 and is cubic with x= 0.50. Magnetization, Curie temperature (Tc) and maximum magnetic-entropy ...

Journal of Magnetism and Magnetic Materials, 2006