Ton Duc Thang University (Vietnamese: Đại học Tôn Đức Thắng) is a public university with the main campus in District 7, Ho Chi Minh City, Vietnam. Established on September 24, 1997, Ton Duc Thang University (TDTU) has been one of the top research universities in Vietnam. It is under the management of Vietnam General Confederation of Labour and is named after Tôn Đức Thắng, who was Vice-President of Vietnam from 1960 to 1969 under the presidency of Ho Chi Minh and later became President of Vietnam from 1969 to 1980. The University offers about 40 undergraduate programs, 18 master programs and 25 doctoral programs in variety of areas such as: law, applied science, technology, vocational skills, social sciences, economics, business, foreign languages, arts. Total enrollment is around 23,500.
Surface modification offers an indispensable strategy to enhance the activity of host materials. First-principles calculations show that copper atoms firmly stabilize on the pristine V2CO2 surface at various sites with high formation energies up to-2.27 eV. The binding mechanism is proposed to be an electrostatic interaction originating from the charge transfer from adatoms to host surface terminations. The anchored coppers tend to aggregate at high concentrations as a result of metal interactions, validated by both density functional and molecular dynamics simulations. Strong adsorption affinities towards hydrogen cyanide (HCN) are found for copper clusters rather than single atoms. The presence of copper adatoms increases the HCN adsorption energy by at least 1.0 eV compared to that on the pristine surface. To adsorb, both C and N form bonds to anchored copper and receive electrons up to 0.56 e for a trimer cluster, resulting in pronounced C-N bond elongations. Moreover, it also shows prospective selectivity of the anchored copper clusters, facilitating the adsorption of target HCN molecules among atmospheric gases. The introduction of surface heteroatoms makes V2CO2 MXene more accessible for molecular adsorption, detection, and conversion.
This work is concerned with global gradient bounds for a class of divergence-form degenerate elliptic systems with complex-valued coefficients. Notably, the leading coefficients are merely required to be sufficiently small in BMO, which is strictly weaker than the VMO condition. In the complex setting, the well-posedness of this problem was recently investigated in [1], where the authors established a strong accretivity condition on the leading coefficients, and this structural condition allows them to derive Schauder-type estimates for weak solutions. In our study, it has already been observed that gaining existence and uniqueness of weak solutions is possible under a natural and less restrictive assumption on the complex-valued coefficients. Following this direction, we prove a global Calderon-Zygmund-type estimate for weak solutions, from which the Morrey-space regularity follows as a consequence. This paper is a contribution to the better understanding of solution behavior and may be viewed as part of a series of works aimed at extending regularity theory in the complex-valued setting.
This numerical contribution examines the magnetic natural convection within a novel nanoliquid filled-enclosure with wavy wall and trapezoidal heater considering interior heat generation. Numerical solutions are obtained via Finite Element Method. The effectual thermal conductivity and viscosity of nanoliquid are computed by Koo-Kleinstreuer-Li correlations considering the nanoparticle's Brownian motion. Impacts of diverse parameters like heat generation parameter, shape factor of nanoparticles, Hartmann number, nanoparticles concentration, displacement of the trapezoidal heater wall, Rayleigh number, and amplitude of wavy wall on natural convective flow characteristic are perused. The results disclose that the application of an interior heat generation and horizontal magnetic field can be an effectual way in controlling natural convective flow inside the system.
Financial support from urban residents represents a potentially important resource for sustaining and expanding public parks, particularly tree-planting initiatives that contribute to biodiversity and human well-being. This study applies the Granular Interaction Thinking Theory (GITT) and Bayesian inference to examine how residents' perceptions of the consequences of biodiversity loss and their park-visit frequency relate to willingness to donate to tree-planting projects in public parks. Based on survey data from 535 Vietnamese residents, the results indicate that perceived loss of ecological knowledge and more frequent park visitation are associated with higher willingness to donate, whereas perceived health-related losses receive moderate posterior support for a positive association. Perceived reductions in economic growth are positively related to park visitation frequency, which, in turn, is associated with greater willingness to donate. In contrast, perceived losses from nature-based recreation are linked to lower visitation frequency and subsequently weaker willingness to make indirect donations. These findings suggest that communication and engagement strategies that emphasize personally and community-relevant benefits may be associated with stronger financial support intentions for urban tree-planting initiatives. As the study focuses on stated willingness rather than observed financial behavior, the implications pertain to intention-based support rather than realized contributions.
Plastic waste pollution poses a severe threat to blue tourism destinations; however, the mechanisms underlying the transition from tourist awareness to behavioral action, specifically tourists’ readiness for co-creation, remain underexplored. This study investigates the drivers of tourists’ readiness to co-create plastic waste solutions by applying the PLS-SEM approach to a sample of 426 visitors to Cua Dai Beach, Vietnam. By integrating the C-A-C framework with the TSOL perspective, the research uncovers distinct motivational pathways across four participation contexts. The analysis indicates that Social Awareness and Shared Responsibility generally drive the Perceived Value of Contribution, which in turn fosters action. However, this pathway is disrupted by financial incentives, which weaken the role of shared responsibility (the crowding-out effect). Conversely, voluntary community participation fosters direct engagement driven by intrinsic norms rather than calculated value. The study provides a multidimensional theoretical model of co-creative behavior for reducing plastic waste and suggests that tourism managers design context-sensitive initiatives that emphasize intrinsic motivation over potentially counterproductive financial incentives.
