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Teaching and learning under the credit-based system has become widespread in the higher education system of Vietnam. The assessment of learning outcomes through credit-based education not only relies on the foundational knowledge accumulated in the classroom but also evaluates the process of self-study and research of learners. Besides spending time studying and researching at the university, students are required to allocate a significant amount of time to conduct self-research and participate in group discussions to address issues related to the subject matter. Although most students demonstrate a high level of self-awareness during the learning process, there are still instances of a lack of self-awareness. Recognizing this issue, the question arises: how to guide students to apply self-research methods effectively and how to objectively evaluate the results of the self-research process? Drawing on practical experience in teaching the Computer Networking course under the credit-based system for students of the K22 cohort, belonging to the Faculty of Information Technology, Thai Nguyen University of Information and Communication Technology, the authors have conducted exchanges and proposed methods, organizing techniques, and assessment tools for evaluating the results of the self-research process of the course content, aiming to enhance the quality of education and encourage students to actively engage in the learning and in-depth research process.

Children with disabilities are a vulnerable group of children who face many difficulties in life and lack basic social skills. By selecting a typical case study, the Vocational Education and Training Center for People with Disabilities in Nghe An province, a combination of quantitative and qualitative information collection methods has been used to clarify educational activities to improve social skills for children with disabilities. Research results show that children with disabilities face many difficulties in social communication. Therefore, children with disabilities have a need for education to improve social skills. Activities to improve social skills for children with disabilities have been organized and received a positive response; However, children with disabilities still have difficulty participating in social skills education activities. On that basis, some solutions have been proposed to improve the quality of social skills education for children with disabilities at the Nghe An Center for Education and Vocational Training of People with Disabilities.

The research was conducted to complete technological protocol of biomass production of algae Nannochloropsis oculata with both culture methods in plastic bags and photo-bioreactor systems. The results show that in the nylon bag system, algae reached a peak of biomass density at day-8 of culture with 80 million cells per ml. In the photo-bioreactor systems, algae were higher density (180 million cells per ml), and longer period of culture (15 days of culture) than in plastic bags. The total products of 404.4 kg of fresh concetrated algae and 57.6 kg of dried algae powder which were suitable produced under climate conditions in Nghe An. All the algae products met the quality and requirements for use as food for aquatic animals as well as raw materials for the production of functional foods for humans.

This study aims to recycle the coal bottom ash (CBA) for making environmentally friendly construction bricks. In the brick proportion, CBA was employed as fine aggregate to replace 0, 30, 50, 70, 85, and 100% of stone powder. The results demonstrate that, the compressive strength, ultrasonic pulse velocity, electrical resistance, and thermal conductivity of the 28-day bricks were in the ranges of 16.1 ÷ 61.3 MPa, 3469 ÷ 4208 m/s, 20.2 ÷ 54.6 kΩ.cm, and 0.75 ÷ 2.2 W/mK, respectively. According to scanning electron microscopy analysis, the rise in CBA content was associated with an increase in the number of voids and pores of bricks, which led to a less dense microstructure and a negative impact on the brick’s quality. However, all specimens created for this investigation met the standards of the official Vietnamese standard and were categorized as grade M15.0 or higher according to their qualities.

In this study, fly ash and ground granulated blast-furnace slag (GGBFS), by-products from the industry, are used as binder materials to manufacture high-performance mortars that will be used to repair marine concrete structures. Four mortar mixtures were designed with a constant water/binder ratio of 0.49 and the GGBFS was used to substitute for 0, 10, 20, and 30 wt.% of cement. Changes in the engineering properties of the mortars corresponding to the GGBFS replacement levels were evaluated. The findings proved that the presence of GGBFS significantly increased the mortar’s strength rate at later ages and increased the early-stage water absorption level. At 56 days, the mortar specimens containing 30% GGBFS had the highest water absorption capacity of 8.2% and respective values of compressive and flexural strength of roughly 49 and 11 MPa. Additionally, it was discovered that adding more GGBFS to the mixtures reduced the drying shrinkage and delayed the setting time of the mortars.

This study evaluates the potential for agritourism development in Binh Dinh Province, Central Vietnam. The analytical hierarchical process is used to determine the weights of four factors with 25 measurement criteria to assess agritourism potential. The research results show that Binh Dinh Province has great agritourism potential based on four evaluation factors, including (1) local agricultural tourism resources, (2) the trend for agritourism development and the agritourism market, (3) the local community’s willingness, and (4) the supporting activities of the local government. In particular, the local agricultural tourism resources factor received the highest score, followed by the local community’s willingness and the supporting activities of the local government. The trend for agritourism development and the agritourism market was rated the lowest. Therefore, Binh Dinh has viable opportunities to encourage the growth of agritourism to improve farmers’ livelihoods

This study focused on water quality assessment of farmed shrimp ponds in Binh Dai District, Ben Tre Province. The goals of the study were to provide chemical parameters of pond water for farmers, to identify problems and causes in farmed shrimp related to water quality and disease, and to help managers find appropriate solutions to minimize damage to local shrimp farming. Water samples were collected monthly from January to June 2021 from 90 vannamei farmers in six different areas, including Vang Quoi Dong, Dinh Trung Binh Thoi, Phu Long, Phu Vang, and Binh Thang of Binh Dai District. Parameters investigated in this study included pH, alkalinity, NH4+, NH3, NO2- and three other minerals. Water quality parameters were analyzed based on APHA standard analysis methods. The results showed that the water quality of shrimp farming areas in Binh Dai fluctuated from time to time, and water quality parameters were suitable for vannamei shrimp farming. However, the concentration of NO2- was always higher than the permitted threshold. The results from cluster analysis and MANOVA testing showed that water quality of the shrimp farming areas in Binh Dai was significantly different (p < 0.05), especially NO2-, Ca, Mg and alkalinity. These findings suggest that farmers must apply proper solutions for water quality management in each farming area to maximize crop production.

Trong nghiên cứu này, chúng tôi đã điều chế than hoạt tính (AC) từ vỏ trấu bằng phương pháp hoạt hoá hoá học với NaOH và kết hợp với siêu âm. Sản phẩm được phân tích bằng phân tích nhiệt trọng lượng (TGA), nhiễu xạ tia X (XRD), hiển vi điện tử quét (SEM) và quang phổ phân tán năng lượng tia X (EDX). Quá trình hấp phụ – giải hấp phụ được sử dụng để xác định diện tích bề mặt (Brunauer – Emmett – Teller, BET). Vật liệu có cấu trúc carbon vô định hình; quá trình nhiệt phân vỏ trấu (than hoá) diễn ra ở khoảng 450 °C; vật liệu có cấu trúc xốp phát triển tốt với kích thước lỗ khác nhau; diện tích bề mặt tối đa khoảng 1673 m2·g–1 thu được từ mẫu kích hoạt bằng siêu âm trong 30 phút (AC30). Mô hình đẳng nhiệt Langmuir đã được áp dụng để mô tả đường đẳng nhiệt hấp phụ của các ion kim loại bằng AC30. Kết quả cho thấy AC30 là một chất hấp phụ tiềm năng để loại bỏ Cr(III) và Pb(II) từ dung dịch nước. Khả năng hấp phụ tối đa là 23,1 mg·g–1 đối với Cr(III) và 41,5 mg·g–1 đối với Pb(II).

In the present work, tungsten disulfide was synthesised and characterised by using X-ray diffraction and scanning electron microscopy. This material was employed to modify a glassy-carbon electrode to analyse clenbuterol. The results show that tungsten disulfide displays electrocatalytic activity toward clenbuterol oxidation. The proposed technique is prospective for clenbuterol examination. The limit of detection and the linear range are 0.51 mM and 1–210 mM.