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The study aimed to evaluate meat yield and meat quality of Hac Phong chickens. A total of 100 birds (50 males and 50 females)from 1 days of agewas raised at the experimental station of Faculty of Animal Science, Vietnam National University of Agriculture . The chickens were fed ad libitum with a complete compound feed. Twenty chickens (10 males and 10 females) were slaughtered at 20 weeks of age with an average live weight of 1303.70 kg. The results found the carcass, breast, and thigh meat percentages were 70.36%, 16.16%, and 22.42%, respectively. The pH value at 15 min and 24 h post-mortem were in the normal range. The color of the meat was dark. The L* (lightness) value was low. The drip loss and cooking loss percentages were low while the tenderness was high. Hac Phong chicken meat contained a high crude protein content (27.71%) and low cholesterol content (25.45%).

Intensification and complexity of pig production systems may require different strategies for animal welfare improvement. We aimed to identify welfare issues of gestation sows and areas for improvement by comparing four production systems, including the smallholder pen-based system (SPS: 26 farms), smallholder stall-based system (SSS:14 farms), semi-intensive stall-based system (SES: 15 farms), and intensive stall-based system (ISS: 10 farms). Ten significant animal-based measures in the Welfare Quality® protocol were used for welfare assessment at the individual level. Stall-housed sows in SES and ISS faced more welfare problems where sows presented a higher prevalence of poor body condition (

This paper examines factors that affect students’ motivation for learning, including, teacher behavior, teaching method, learning environment, and learning goal orientation by using regression analysis of data collected from one hundred ninety-six students at Industrial University of Ho Chi Minh City, VietNam. In addition, the researcher also investigates whether students’ gender, age, and field of study have any influence on student motivation through Independent Sample T-test and One-Way ANOVA tests. The results show that learning goal orientation has the most influence on student motivation, whereas there is no difference between groups of gender, age, and field of study. Furthermore, the independent variables explain nearly 30,22% of the variance of student motivation, implying that there are many other factors influencing student motivation for further study.

Students’ feedbacks have been an essential part of a range of higher educations as universities in Vietnam recently. This information could be about lectures, facilities, curriculum and how to improve them. The feedback is collected and processed manually at the end of each semester. We proposed to build a system which is ability to categorize students’ feedbacks automatically. This system helps us save time, human resource and money for any higher education institutions. Firstly, we created university students’ feedbacks data in two years and organized them into three classes: Positive, Negative and Neutral. We built the Vietnamese sentiment dataset with 5000 classified sentences. Then, we use three classifiers which are Naive Bayes, Maximum Entropy and Support Vector Machine on our annotated data. The result proves that Maximum Entropy algorithm is better than Naive Bayes and Support Vector Machine with the best score of 91.36%. With high accuracy, we confidently implement our results to develop the students’ feedbacks system to detect students’ opinions. With negative and positive students’ opinions, we can adjust and improve the lectures, facilities, curriculum and make the quality of university better over the years.

Recently developed in Vietnam segmented grinding wheels is base on the fundamental of discontinuous machining is used to enhance the grindability of abrasive grains. The phenomenon of grinding chips adhesive to space between grains, that make the wheels became "dull", was reduce, special machining aluminum. In this paper, the evalution of segmented grinding wheel is based on the cutting performance. η is defined as a ratio between the discontinued regions and the of the grinding wheel’s working surface. There were five newly developed grinding wheels with (10.91%, 16.37%, 18.19%, 20.01% and 21.83% respectively) and one conventional η different η = 0%) were used to grind unhardened steel, hardened steel and aluminum. The results showed η grinding wheel (that segmented grinding wheels obtained a smoother surface in compared with conventional η = 20,01% for machining unhardened steel and at η = 18,19% machining aluminum material. On the other hand, segmented wheels with a less number of abrasive grains, show a higher efficiency for obtaining the smoother surface roughness than conventional wheels in the same working conditions. However, the mechanism of machining hardened and aluminum materials is a little bit different. В статье рассматриваются сегментированные шлифовальные круги, разработанные недавно во Вьетнаме с опорой на основы прерывистой механической обработки, с целью повышения шлифующей способности зерен. Явление "засаливания" шлифовального круга, возникающее при налипании шлифованной стружки в межзеренном пространстве, при использовании таких кругов уменьшается, особенно при обработке алюминия. Исследовались круги с различным соотношением прерывистых участков и рабочей поверхности круга. Испытания кругов проводились для алюминиевого сплава, а также закаленной и незакаленной стали при различных режимах обработки, при этом выявлены некоторые отличия в механизме механической обработки.