THE PERCEIVED EFFECTS OF TEST-TAKING STRATEGIES INSTRUCTION ON EFL HIGH SCHOOL STUDENTS' MULTIPLE-CHOICE TESTS OF READING COMPREHENSION

This study aims to investigate whether the use of a text-taking strategy could enhance EFL high school learners' reading comprehension. It draws on the test-taking strategies suggested by Cohen and Upton (2007), to focus on the two main aspects, (1) the influence of applying test-taking strategies on EFL high school students’ reading comprehension tests and (2) their attitudes toward these strategies. In the pretest-posttest one-group design and descriptive quantitative research, the reading comprehension test and the questionnaire were used to collect the data of 90 EFL high school students in a school in rural Can Tho City. These students were assigned to apply test-taking strategies in a workshop every week in the second Semester of 2021-2022. The findings showed that (1) participating students’ reading comprehension scores improved after following the test-taking strategies after 07 weeks; and (2) students were positive about their being active in their testing practice despite certain challenges. As a result of such positive attitudes, they had high motivation for continuing their practice test-taking strategies for the future examination.  Article visualizations

Industrial Structure and Employment Structure Evolution and Forecast in Viet Nam

The interaction mechanism between industrial structure and employment structure has great importance in the development of any economy. But it always needs a constant vigilance to adjust and evolve which promotes the economic development of a country. This study tries to find out the optimization correlation between industrial structure and employment structure in Vietnam for the period of 1995-2014. This study has found that labor is moving gradually from low efficiency production section to high efficiency production section. This paper uses the vector auto-regression model (VAR) to forecast industrial structure and employment structure change trend in Vietnam for 2015-2020. The forecasted results show that industrial structure trend is moving towards higher progression, eventually transforming to "321" pattern. However, the change in employment structure lags behind changes in the industrial structure as labor structure is showing a "132" pattern. Keywords: Industrial structure, Employment structure, vector auto-regression, Vietna

Calculation of Temperature-Dependent Thermal Expansion Coefficient of Metal Crystals Based on Anharmonic Correlated Debye Model

This study aims to calculate the anharmonic thermal expansion (TE) coefficient of metal crystals in the temperature dependence. The calculation model is derived from the anharmonic correlated Debye (ACD) model that is developed using the many-body perturbation approach and correlated Debye model based on the anharmonic effective potential. This potential has taken into account the influence on the absorbing and backscattering atoms of all their nearest neighbors in the crystal lattice. The numerical results for the crystalline zinc (Zn) and crystalline copper (Cu) are in agreement with those obtained by the other theoretical model and experiments at several temperatures. The analytical results show that the ACD model is useful and efficient in analyzing the TE of coefficient of metal crystals

Evaluation of pesticide residues in vegetables from Mekong, Delta, Vietnam using LC-MS/MS

Purpose: To assess the levels of pesticide residues in commonly used vegetables in Vietnam as a reference for future monitoring. Methods: A total of 180 samples of six different fresh vegetables including watercress, mustard green, choy sum, daikon, okra, and yam were analyzed from Mekong Delta, Vietnam. Ten popular pesticides were evaluated using liquid chromatography-tandem mass spectrometry (LC-MS/MS) after extraction with a multi-residue method (QuEChERS method). Results: The results were assessed according to the maximum residue limit (MRL) provided by Codex for each pesticide in each commodity. Pesticide residues above the MRL were detected in 107 samples (59 %) and 63 samples (47 %) contained residues below the MRL. Multiple residues were present in 38.3% of the samples with two to five pesticides, and 0.6 % of samples were contaminated with more than five pesticide residues. Of the pesticides investigated, eight pesticides were detected, of which abamectin, alpha-cypermethrin, acetamiprid, chlorpyrifos- ethyl, chlorantraniliprole, fenobucarb, fipronil, and trichlorfon exceeded their MRLs. Pesticide residues were detected above MRLs in samples of watercress (14 samples), mustard green (24 samples), choy sum (25 samples), daikon (26 samples), and yam (18 samples). Chlorpyrifos-ethyl, and fipronil were detected in most of the vegetable samples (100% and 89.44%, respectively). Conclusion: The results indicate the occurrence of pesticide residues in commonly consumed vegetables in Vietnam. The need for the regular monitoring of pesticide residues and the sensitization of farmers to better pesticide safety practices, especially the need to adhere to recommended pre-harvest intervals is recommended

SYNTHESIS, CHARACTERIZATION AND ELECTROCHEMICAL PERFORMANCE OF ACTIVATED CARBON SUPPORTED MnO2 FOR ELECTROCHEMICAL CAPACITOR

MnO2 was synthesized by adding activated carbon into KMnO4 solution and stirred in a magnetic or ultrasonic stirrer. The obtained MnAC samples were characterized by means of XRD, TGA, TPR-H2, SEM and BET. All samples are amorphous and have porous structure. MnAC-M prepared by magnetic stirring have higher manganese content, earlier reduction temperature, smoother surface area while MnAC-U prepared by ultrasonic stirring have larger specific surface area and pore volume

Review of Literature of Faculty Motivation for Doing Research in Universities

Faculty research in the universities plays a very important role in the education and development of every country in the world. The purpose of this research is to review studies in this field, different approaches in studies, and fundamental theories used for studies. The results obtained from the literature review show that many scholars have conducted researches on the determinants influencing the faculty productivity to do research. Most of studies apply the theories of working motivation. However, not many scholars conduct research on the faculty motivation to do research. The final result of this research provides follow-up suggestions for studies of the motivation for conducting research on the side of lecturers, thereby guiding managers to enhance faculty motivation to do research. Keywords: Motivation, productivity, research, lecturer/faculty. DOI: 10.7176/EJBM/11-20-10 Publication date:July 31st 201

Dietary patterns and risk factors for Type 2 diabetes mellitus in Fijian, Japanese and Vietnamese populations

Diabetes mellitus is now a serious and increasing problem in Asian countries, where dietary patterns have shifted toward Westernized foods and people are becoming more sedentary. In order to elucidate the relationship of dietary habits to the development of diabetic risk factors, the dietary patterns of 200 Fijian, 171 Japanese and 181 Vietnamese women of 30–39 years of age were investigated using 3 day–24 h recall or dietary records. Anthropometric measurements and glycosuria tests were also conducted. The dietary trends of Fijians and Japanese have changed drastically in the past 50 years, while Vietnamese have been minimally influenced by Western dietary habits. The mean 24 h dietary intake showed that Fijians had the highest energy intake. Energy intake from fat was only 13% for Vietnamese, but over 30% for Japanese and Fijians. Percentage of body fat was higher in Vietnamese than in Japanese, though there were no significant differences in body mass index (BMI). In the overweight and obese women, Vietnamese had higher abdominal obesity than Japanese. The prevalence of obesity (BMI � 30 kg/m2) was 63.0% for Fijians, 1.8% for Japanese and 1.1% for Vietnamese. Glycosuria testing yielded the most positive cases among Fijians. Dietary transition and dietary excess appear to be potential risk factors for diabetes in Fijian women

Incidence of dengue and chikungunya viruses in mosquitoes and human patients in border provinces of Vietnam

Background: Dengue virus remains a major threat in Vietnam, while chikungunya virus is expected to become one. Surveillance was conducted from 2012 to 2014 in Vietnam to assess the presence of dengue and chikungunya viruses in patients hospitalized with acute fever in five Vietnam provinces neighboring Lao PDR and Cambodia. Surveillance was extended to mosquitoes present in the vicinity of the patients' households. Results: A total 558 human serum samples were collected along with 1104 adult mosquitoes and 12,041 larvae from 2250 households. Dengue virus was found in 17 (3%) human serum samples and in 9 (0.8%) adult mosquitoes. Chikungunya virus was detected in 2 adult mosquitoes (0.18%) while no chikungunya virus was detected in humans. Differing densities of mosquito populations were found, with the highest in the Long An Province border with Cambodia. Long An Province also displayed the lowest rate of infection, despite a very high Breteau Index, high human population density and presence of the main cross border road system. The highest incidence was found in Dac Nong Province, where the Breteau and Container indices were the second lowest. Dengue virus was detected in five Aedes albopictus, three Aedes aegypti and one Culex vishnui. Chikungunya virus was detected in two Ae. aegypti. All infected mosquitoes belonged to haplotypes described in other parts of the world and a number of novel haplotypes were found among uninfected mosquitoes. Conclusions: Dengue is considered to be regularly introduced to Vietnam from Cambodia, mostly through human movement. The data reported here provides a complementary picture. Due to intensive international trade, long-distance transportation of mosquito populations may play a role in the regular importation of dengue in Vietnam through Ho Chi Minh City. It is important to decipher the movement of mosquitoes in Vietnam, not only at the Lao PDR and Cambodia borders but also through international trade routes. Mosquito surveillance programs should address and follow mosquito populations instead of mosquito species