Computation of transient viscous flows using indirect radial basis function networks

In this paper, an indirect/integrated radial-basis-function network (IRBFN) method is further developed to solve transient partial differential equations (PDEs) governing fluid flow problems. Spatial derivatives are discretized using one- and two-dimensional IRBFN interpolation schemes, whereas temporal derivatives are approximated using a method of lines and a finite-difference technique. In the case of moving interface problems, the IRBFN method is combined with the level set method to capture the evolution of the interface. The accuracy of the method is investigated by considering several benchmark test problems, including the classical lid-driven cavity flow. Very accurate results are achieved using relatively low numbers of data points

Dengue viruses binding proteins from Aedes aegypti and Aedes polynesiensis salivary glands

Dengue virus (DENV), the etiological agent of dengue fever, is transmitted to the human host during blood uptake by an infective mosquito. Infection of vector salivary glands and further injection of infectious saliva into the human host are key events of the DENV transmission cycle. However, the molecular mechanisms of DENV entry into the mosquito salivary glands have not been clearly identified. Otherwise, although it was demonstrated for other vector-transmitted pathogens that insect salivary components may interact with host immune agents and impact the establishment of infection, the role of mosquito saliva on DENV infection in human has been only poorly documented. To identify salivary gland molecules which might interact with DENV at these key steps of transmission cycle, we investigated the presence of proteins able to bind DENV in salivary gland extracts (SGE) from two mosquito species. Using virus overlay protein binding assay, we detected several proteins able to bind DENV in SGE from Aedes aegypti (L.) and Aedes polynesiensis (Marks). The present findings pave the way for the identification of proteins mediating DENV attachment or entry into mosquito salivary glands, and of saliva-secreted proteins those might be bound to the virus at the earliest step of human infection. The present findings might contribute to the identification of new targets for anti-dengue strategies

Wave heights recovery from subsurface pressures upon a small vertical cylinder

[No abstract available]German Federal Environment Ministry (BMU)/GIGAWIN

A continuum-microscopic method based on IRBFs and control volume scheme for viscoelastic fluid flows

A numerical computation of continuum-microscopic model for visco-elastic flows based on the Integrated Radial Basis Function (IRBF) Control Volume and the Stochastic Simulation Techniques (SST) is reported in this paper. The macroscopic flow equations are closed by a stochastic equation for the extra stress at the microscopic level. The former are discretised by a 1D-IRBF-CV method while the latter is integrated with Euler explicit or Predictor-Corrector schemes. Modelling is very efficient as it is based on Cartesian grid, while the integrated RBF approach enhances both the stability of the procedure and the accuracy of the solution. The proposed method is demonstrated with the solution of the start-up Couette flow of the Hookean and FENE dumbbell model fluids

TEACHER TALK IN EFL SPEAKING LESSONS AND IMPLICATIONS FOR LEARNER INVOLEMENT: A CASE STUDY AT A FOREIGN ENGLISH CENTER IN THE MEKONG DELTA, VIETNAM

In English teaching classrooms, teacher talk plays as a communicative tool to help language learners to communicate effectively. Studies (Walsh, 2002; Xiao Yan, 2006; Cullen, 1998) have been carried out to investigate the essential role of teacher talk. This paper focuses on the purpose, frequency, and teacher talking time in speaking English language lessons. This study aimed at investigating features of teacher talk constructing and obstructing learner speaking involvement. The results show that teacher talk plays as an important role in language teaching including giving instruction and classroom management, however, the use of language in both L1 and L2 should be taken into consideration in order to maximize student learning involvement.  Article visualizations

Female Buddhist Intellectuals with Industry 4.0 in Vietnam Today

The industrial revolution 4.0 has a strong impact on production activities, creating a great change in production methods and social life. Successfully implementing the industrial revolution 4.0 is a strategy of "going ahead, getting ahead" for Vietnam to become a "start-up" country, creating a "breakthrough" step in the process of rapid and sustainable development; affirming the position and stature of Vietnam in the region and the world. As one of the important resources of Buddhism in particular, over the years, Buddhist female intellectuals have constantly developed and made active contributions to the process of integration and development of the country and Buddhism. Therefore, in the article, the author delves deeply into clarifying the role of female Buddhist intellectuals in Vietnam for many years, thereby proposing some solutions to further promote the role of Buddhist female intellectuals. in the Industrial Revolution 4.0 in Vietnam today. Keywords: Industry 4.0, Female intellectuals, Buddhism, Roles, Buddhism in Vietnam. DOI: 10.7176/JCSD/66-04 Publication date:August 31st 2021

Comparison of drag and inertia coefficients for a circular cylinder in random waves derived from different methods

[No abstract available