The Propagation of the Electromagnetic Wave in Multilayers Structures Composed from Cholesteric Liquid Crystals under the Influence of the External Electric Field

The tensor solution for the electromagnetic wave being in quadrature with the surface of the cholesteric liquid crystal under the influence of the external electric field along axis of swing of crystal, has been found. Description of the reflection, transmission of the electromagnetic wave in multilayer structures composed from cholesteric liquid crystals have been shown. Futher the dependence of the reflection spectrum on the polarization of the incident beam and magnitude of the external electric field are determined

FIELD TEST ON CLEANING OF OIL POLLUTION ON NHATRANG BEACH OF VIETNAM

Joint Research on Environmental Science and Technology for the Eart

SOLUTIONS TO ENHANCE THE IMPLEMENTATION OF SPORTS CLUB ACTIVITIES IN HOCHIMINH CITY HIGH SCHOOLS, VIETNAM

The purpose of this study was to develop solutions for enhancing the implementation of sports club activities in Hochiminh City high schools in Vietnam. 40 experts in coaching and teaching in sports clubs participate to find out solutions for enhancing the implementation of sports club activities. Through the practical basis and assurance conditions, as well as meeting the requirements when developing solutions, interviewing experts and the reliability, results have been developed 10 solutions, they were (1) develop a specific and suitable plan, (2) implement policies to increase funding, (3) strengthen the inspection, (4) organize and diversify sports, (5) strengthening sports activities in clubs, (6) develop appropriate supplementary exercises, (7) enhance the quantity/ quality of human resources, (8) ensure facilities, equipment, and training tools, (9) awareness the importance of sports club, and (10) build the fitness assessment and classification. In conclusion, 10 solutions were set up which have contributed to improving the implementation of sports club activities in Hochiminh City high schools, Vietnam; however, they need to be applied in practice to get better evaluation results.  Article visualizations

Self-injurious Behavior of Children with Autism in Vietnam: Across Sectional Study

This study explored self-injurious behaviour (SIB) of autistic children in Vietnam through a crosssectional design. 60 informants, including 57 parents and 3 caregivers completed the questionnaire on problem behaviour consisting of aggression, self-injury, stereotyping, property destruction, other problem behaviours and their functions. Results revealed that children experienced all mentioned problem behaviours, especially self-injurious behaviour. The topographies of self-injurious behaviour of the children included head-hitting, head-scratching, head-banging, hair-pulling, face-hitting, facepuncturing with a pen, ear-scratching, lip-picking, hand-biting, hand-scratching, hand-pinching, and belly-scratching. The most common area of self-injurious behaviour is the head. The functions of these problem behaviours were expressed in four types (social positive reinforcement, social negative reinforcement, automatic positive reinforcement and automatic negative reinforcement). Social positive reinforcement appeared as a prominent function. Out of these 57 children, 21 of them who were autistic with self-injurious behaviour went through a functional behaviour assessment (FBA) in which the four conditions known as attention, tangible items, escape from task/activities, automatic stimulation were tested. The results of functional behaviour assessment (FBA) further indicated the correspondence between the FAST-R and FBA outcome on function of problem behaviour, especially self-injurious behaviour. The research concluded that the prominent function of these self-injurious behaviours was social function. It means self-injurious behaviours usually occur within a condition of social interaction, especially, in this present study, in the tangible condition. The antecedent of selfinjurious behaviour is the removal of tangibles (e.g. food, preferred items). This paper contributes to our knowledge of self-injurious behaviour of children with autism in Vietnam where empirical research of this field was still very rare

Microbial diversity in trace water of jet fuel in Vietnam

Joint Research on Environmental Science and Technology for the Eart

The proliferation and differentiation of pre-osteoblastic MC3T3-E1 cells from Vietnamese drug formulations

A public heath problem, osteoporosis, is recognized as the prevalent disease, and mainly causes for impairment and loss mass of bone. It closely related the balance between bone formation by osteoblasts and resorption by osteoclasts during the remodeling cycle of bone. Hence, pharmaceutical therapies are looking for the potential agents to stimulate osteoblastic bone formation, as well as inhibit osteoclastic processes

Does academic procrastination mediate the link between Facebook addiction and academic satisfaction?

Purpose: Earlier studies suggested a link between Facebook addiction and life satisfaction among university students, but the association between it and academic satisfaction and their inner influencing mechanisms still needs to be clarified. This study investigated a mediation model between Facebook addiction and academic satisfaction, with academic procrastination as a mediator. Methods: A sample of 710 students (M = 18.80, SD = 0.8; 61.5% are female) from a university in Vietnam completed measures of Facebook addiction, academic procrastination, and academic satisfaction. Simple mediation analyses were conducted using PROCESS (Model 4) to calculate the indirect effects of Facebook addiction on academic satisfaction through academic procrastination. Findings: The results indicated that Facebook addiction was positively associated with academic satisfaction among university students, and academic procrastination partially mediated the association between Facebook addiction and academic satisfaction among university students. Conclusion: These findings provide a better understanding of the relationship between Facebook addiction, academic procrastination, and academic satisfaction, which may guide targeted interventions to improve academic satisfaction among university students

Density estimates for the exponential functionals of fractional Brownian motion

In this note, we investigate the density of the exponential functional of the fractional Brownian motion. Based on the techniques of Malliavin’s calculus, we provide a log-normal upper bound for the density

Soybean yield, seed quality and thresh efficiency by mechanisation at different harvesting stages and postharvest ripening

This study determined the most appropriate and earliest soybean harvesting stage and the number of days of postharvest ripening with minimal effects on seed losses and quality when mechanical harvest and threshing were applied. Harvesting stages at four physiological maturities (60, 70, 80, and 90%) and various days of postharvest ripening treatment (1, 2, and 3 days) were applied for two soybean varieties DT12 and DT26. Harvesting at physiological maturity of 90% recorded the highest seed-shattering loss but the least seed damage (<5%) and highest seed quality, followed by a physiological maturity of 80%. There were no significant differences in seed yields between harvesting stages of 80 and 90% maturity. Harvesting soybeans at a physiological maturity of 60 and 70% resulted in no seed losses but a significant reduction in seed quality. To avoid adverse weather, an early harvest stage at a physiological maturity of 80% is suggested. Although postharvest ripening of soybeans for early harvest caused seed shattering losses (2-5%), it was necessary to ensure seed quality. These results indicate effective and practical methods for farmers at small households to use in early mechanical harvesting of soybeans

Density estimates for the exponential functionals of fractional Brownian motion

In this note, we investigate the density of the exponential functional of the fractional Brownian motion. Based on the techniques of Malliavin’s calculus, we provide a log-normal upper bound for the density