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Hypertensive patients are more likely to suffer from mental disorders including depression, leading to an increase in disease burden for patients, families, and society. This study aims to determine the depression rate by the PHQ9 scale and some factors related to depression in hypertensive patients in Can Tho City in 2018 - 2019. A cross-sectional study of 772 hypertensive patients in Can Tho City with an average age of 64.6 years (SD: 12.29) was conducted. About 20.3% of patients had depressive symptoms, with an average of 2.66 points (SD: 3.38); in particular mild depression 16.5%; average 4.3%; heavy and very heavy 1.6%. Being female, smoking, alcohol use, exercise, diastolic blood pressure ≥ 90mmHg, systolic blood pressure ≥ 140mmHg were associated with a higher total score with a score of 1.78; 2.37; 1.65; 0.88; 1.02; 3.12 points, respectively. Patients with a normal weight and adherence to treatment had a total reduction of 0.09 points and 0.94 points respectively. While adequate physical activity and normal BMI were considered positive effects on depression with OR = 0.61 and 0.89, adherence to treatment was considered negative one with OR = 1.15. Depression can worsen the condition of hypertension in particular and chronic diseases in general.

Coastal flow plays an important role in near-shore sediment transport, affecting the grain size distribution, as well as the shoreline changes. This study focuses on analysing near-shore coastal flow under the influence of wave, wind and tidal combinations along the Soc Trang province coast, Vietnam using the model on a curvilinear coordinate system. The hydraulic model applied is a two-dimensional numerical model based on depth-averaged Reynolds equations in curvilinear coordinates with the advantage of minimizing boundary errors in an area with complex coastline changes. The model was calibrated and validated with data measured at the stations, showing consistency between the observation and simulation. The direction of coastal flow under the conditions of waves and winds depends on the monsoon season. The influence of the Northeast monsoon on the flow velocity is more than the Southwest monsoon. The coastal flow is mainly influenced by tidal currents, in which, the difference in velocity at spring tide is smaller than that at neap tide. On the contrary, wind-affected flow and wave-influenced flow are negligible.

Tea is the most commonly consumed beverage worldwide due to promote health and prevention of some human diseases. Soursop tea pulp is one of a new product focused on the values of total ascorbic acid (TAA), total polyphenol content (TPC) and total flavonoid content (TFC). A study using DPPH and ABTS method to detect the maximum of active ingredients in tea simultaneously. Different pulp tea samples with varying dates of production checked for TAA, TPC, TFC, antioxidation and sensory evaluation. There is a difference in TAA between sample (1) and (4), achieved 7.43 ± 0.04 mg/g DM and 12.21 ± 0.04 mg/g DM, respectively. TFC content ranged between 0.13 and 0.18. The phenolics group in tea is high and there are differences between the 3 recent production samples with (1): 3.81 mg QC/g DM fluctuation. In sample 1, the antioxidant activity of the ethanol extract of Soursop was correlated with total phenolic and flavonoid content with values IC50 of 0.26 mgAA/g DM, 2.61 mgAA/g DM for DPPH and ABTS scavenging activity, respectively. Moreover, the Lab* colour space of the soursop tea is measured in the dark area, the L* difference achieved at 30.82 ± 1.24 (2) lowest and the highest 37.42 ± 4.77 (1). Consumer sensory evaluation is performed with results based on a 5-point scale describing: flavour, aroma, colour and favourite.

Sand mining, among the many activities that have significant effects on the bed changes of rivers, has increased in many parts of the world in recent decades. Numerical modeling plays a vital role in simulation in the long term, however, computational time remains a challenge. In this paper, we propose a sand mining component integrated into the bedload continuity equation and combine it with high-performance computing using graphics processing units to boost the speed of the simulation. The developed numerical model is applied to the Mekong river segment, flowing through Tan Chau Town, An Giang Province, Vietnam. The 20 years from 1999 to 2019 is examined in this study, both with and without sand mining activities. The results show that the numerical model can simulate the bed change for the period from 1999 to 2019. By adding the sand mining component (2002&ndash, 2006), the bed change in the river is modeled closely after the actual development. The Tan An sand mine in the area (2002&ndash, 2006) caused the channel to deviate slightly from that of An Giang and created a slight erosion channel in 2006 (&minus, 23 m). From 2006 to 2014, although Tan An mine stopped operating, the riverbed recovered quite slowly with a small accretion rate (0.25 m/year). However, the Tan An sand mine eroded again from 2014&ndash, 2019 due to a lack of sand. In 2014, in the Vinh Hoa communes, An Giang Province, the Vinh Hoa sand mine began to operate. The results of simulating with sand mining incidents proved that sand mining caused the erosion channel to move towards the sand mines, and the erosion speed was faster when there was no sand mining. Combined with high-performance computing, harnessing the power of accelerators such as graphics processing units (GPUs) can help run numerical simulations up to 23x times faster.

Understanding sediment dynamics is important for coastal and river erosion mitigation in the Vietnamese Mekong Delta, but this is a difficult work because it is affected by both natural and human factors. The objective of this study is to investigate the accretion and erosion processes in the Bassac and Mekong Rivers from intertidal to fluvial dominated zones by applying MIKE 21. The model was calibrated and validated using in-situ measurements in the 2017 year and the results indicated that the MIKE 21 model is able to simulate reasonably the discharge, water level, and suspended sediment concentration for the study area, with NSE exceeding 0.74 for both calibration and validation periods. Based on the well-calibrated MIKE 21 model, the accreted and eroded river segments in the study area from the river- to tidal-dominated areas were identified. The development of this model is an important step for further applications in understanding impacts of hydrological and sediment alterations from the upstream Vietnamese Mekong Delta on coastal and river morphology in the study area.

River bank processes of erosion and accretion are influenced by both of natural processes and human activities. Therefore, understanding the riverbank processes plays an important role in erosion and accretion mitigations in the Vietnamese Mekong Delta. The objective of this study is to investigate the response of flow and sediment dynamics under impacts of sand mining, river encroachment due to the expansion of fish ponds, and hydrological alteration from the upstream area – a case study in the Mekong River in the Vinh Long province by using MIKE 21 FM model. The calibration and validation results indicated that MIKE 21 FM is one of reliable and reasonable tools for simulating the flow and sediment dynamics in the study area. The responses of flow and sediment dynamics under separate and combined impacts of the illegal sand-mining, river encroachment, and upstream hydrological changes were simulated based on the calibrated model. The results obtained in this study could be useful to propose mitigation measures for riverbank erosion and accretion for management and monitoring

Understanding river bank and shoreline dynamics is important for ecological conservation, livelihood stabilization, water resources management and hazard mitigation, but this is always a difficult task because the river and coastal morphology is influenced by both natural processes and human activities. The Vietnamese Mekong Delta with its dense population of 17 million people and a complex river system under the impacts of both natural and artificial drivers was chosen as a case study to understand erosion and accretion mechanisms of deltas. Sedimentation plays a critical role in sustaining the livelihoods of population, biodiversity, and food production, but long-term and large-scale sediment dynamics studies on huge sediment starvation due to dams and sand mining were limited. Remote sensing data analysis with the cloud-computing-based Google Earth Engine for the period from 1989 to 2014 has exhibited that both regional and local drivers and hydrological characteristics of each region were responsible for river bank erosion and accretion. In the river-dominated zone, the levels of erosion and accretion are from medium rates (1–5 m/year) to high rates (> 5 m/year), and erosion processes commonly occur along the Mekong River branch (Tien River). In the tidal-dominated zone, the river banks were quite stable, and erosion processes with medium levels mainly occurred at river segments near estuaries, except for the Ba Lai estuary. In the coastal zone, erosion and sedimentation alternatively took place at a rapid rate. The main erosion mechanisms were toe-scour and lower slope erosion in the river-dominated zone, the tidal fluctuation-related soil collapses in the tidal-dominated zone, and monsoon-influenced erosion in the coastal zone. Engineering or alternative solutions should be chosen appropriately to maximize the efficiency of protection for each region, while more monitoring programs are required to provide more reliable data to study erosion and sedimentation processes.