No. 13 (2025)

Article

• Course evaluation summary Using opinion mining techniques

  Mỹ Linh Nguyễn, Trương Quốc Định, Trương Mỹ Thu Thảo (Author)

  Abstract | PDF (Vietnamese) | Views: 7 Downloads: 7

  Before registering for a course at universities, students often choose a lecturer to teach a course by consulting the opinions of previous students on social networking platforms, such as "confession" pages or fanpages for students and alumni of the university on Facebook. Therefore, synthesizing students' opinions about lecturers through comments on social networks forms the basis for lecturers to adjust their teaching activities. In this paper, we propose a method for automatically synthesizing students' opinions on teaching activities and lecturers' evaluation methods based on opinion mining techniques applied to a dataset of student comments on social networks. The result of this process is three datasets: a list of lecturers recommended by students for a course, a lecturer's general views on teaching and grading methods, and a lecturer's views on teaching and grading methods for a specific course  with 100%, 93,1%, and 97,6% accuracy, respectively.

• Factors affecting learning outcomes of economics students - at vinh long university of technology education

  NGUYỄN HÙNG CƯỜNG, HUỲNH THỊ THÙY LINH, BÙI MAI NGUYÊN ANH, NGUYỄN ĐẶNG MỸ HẠNH, PHẠM PHƯƠNG MAI (Author)

  Abstract | PDF (Vietnamese) | Views: 3 Downloads: 7

  This study aims to assess the current situation and identify the factors affecting the academic performance of students majoring in Economics at Vinh Long University of Technology Education. The research results show that from cohort 45 (2020) to cohort 49 (2024), students' academic performance varied significantly. The proportion of students achieving "good" or higher grades accounted for 74.3% in cohorts 46 and 47 but declined in cohort 48. Seven factors were identified in order of influence: Learning Motivation (+), Teaching Methods (+), Learning Conditions (+), Academic Advising (+), Learning Environment (+), Class Management Teachers (+), and Family - Economic Circumstances (-). Among these, "Learning Motivation" had the greatest impact, while "Student Support Activities" showed no statistically significant effect. Based on these findings, the study proposes several managerial implications to improve student academic performance and enhance the quality of education at the university in the future.

• Effects of partial replacement of nacl by kcl on drying kinetics and drying curve model of dried snakehead fish  (channa striata)

  Nguyễn Quỳnh Như, Nguyễn Phụng Tiên, Trần Hồng Quân (Author)

  Abstract | PDF (Vietnamese) | Views: 5 Downloads: 6

  The effect of partial replacement of NaCl by KCl on the kinetics of moisture content change of snakehead fish fillets in hot air dryer was experimentally studied. Four common drying models were developed based on the collected data. The results showed that at a drying temperature of 50^oC, the time for the product to reach the required moisture content (27-30%) was 48 hours for NaCl: KCl ratios of 100:0%, 70:30%, 50:50%, 30:70%, 10:90% and 0:100%, respectively. The Page model was selected as the most suitable model to explain the drying process of snakehead fish (R²>0,9) from the all applied models.

• Testing and evaluating students’ study results for social work students at vinh long university of technology education

  Trần Kim Ngân Đinh (Author)

  Abstract | PDF (Vietnamese) | Views: 10 Downloads: 5

  Evaluating students’ study results is an important step in the teaching and learning process, helping to measure the learning outcomes of the courses and evaluate the effectiveness of the training program. This article presents the importance of testing, evaluating study results; analyze the current situation and propose some solutions to improve the quality of testing, evaluating study results for students majoring in Social Work at Vinh Long University of Technology Education.

• Research on turbocharger on 1kr-vet engine to improve engine efficiency

  LÊ HỮU THỜI, CAO HÙNG PHI (Author)

  Abstract | PDF (Vietnamese) | Views: 3 Downloads: 5

  The paper presents the simulation results of the influence of turbocharger on engine torque and fuel flow. The study has built equations, investigated engine torque and fuel flow on Matlab Simulink software. The technical parameters of the IKR-VET engine are used as input for the model, allowing to evaluate the influence of turbocharger on engine torque and fuel flow. The simulation results show that the engine equipped with turbocharger helps to create high torque with low engine fuel flow.

• Dish recommendation combining content-based And user-based collaborative filtering techniques

  Nguyễn Thị Bảo Hiền, Nguyễn Thái Nghe, Trương Mỹ Thu Thảo (Author)

  Abstract | PDF (Vietnamese) | Views: 6 Downloads: 2

  Current recommender systems have attracted significant attention in research and practical applications. Applying recommendation techniques to the culinary field, especially in suggesting dishes, still holds considerable potential for exploration and development. This paper, titled "Dish Recommendation Combining Content-Based and User-Based Collaborative Filtering Techniques" proposes a specific model to address this problem. It employs a hybrid approach combining content-based filtering with collaborative filtering to recommend dishes to customers. Subsequently, the system is integrated into an electronic menu for practical experimentation, offering intuitive recommendations to users. The experimental results of the model show a root mean squared error (RMSE) of 0.325 and an F1-Score of 66.3%.

• Building a library for mobile robot traction in environments with obstacles

  Hữu Toàn Lê, Huỳnh Minh Châu, Bách Nguyễn, Vĩnh Phúc Trần (Author)

  Abstract | PDF (Vietnamese) | Views: 8 Downloads: 5

  Path planning and obstacle avoidance are fundamental topics in the field of mobile robotics, forming the basis for autonomous navigation in dynamic environments. This paper presents a real-time control application developed using NI LabVIEW to execute effective obstacle avoidance for a mobile robot. The control system enables real-time monitoring and autonomous navigation by integrating sensor feedback into the motion planning process. Experimental results demonstrate the stability, reliability, and high precision of the system with minimal error, validating the feasibility and efficiency of the proposed method.

• Some social issues in the current school environment

  Nguyễn Thị Hồng, Đinh Trần Kim Ngân (Author)

  Abstract | PDF (Vietnamese) | Views: 7 Downloads: 6

  The school environment is not only a place where students acquire knowledge but also where they develop life skills and build their character. However, along with societal advancements, various social issues have infiltrated schools, negatively impacting the learning process and students’ personal development. This article focuses on analyzing some common issues in the school environment today including school violence, discrimination, mental health issues, social vices, and a lack of knowledge regarding sexual health ... At the same time, propose solutions to address this situation.

• Determining traffic density

  Phương Trang Lý, Hoàng Việt Trần, Quan Khánh Nguyễn, Văn Trọng Từ (Author)

  Abstract | PDF (Vietnamese) | Views: 7 Downloads: 6

  Traffic safety is an issue of particular concern to society, with an average of 30-35 fatalities daily, mainly on the roads. The main reason is the increasing number of vehicles, primarily personal vehicles. Research, survey, and statistically analyze the times and routes with high traffic, and propose warning tools to assist citizens, traffic police, and managers in reducing traffic congestion. Applying deep learning models to develop solutions and using Yolov8 for object detection. The dataset includes 1030 images divided into 2 folders: train (824 images) and test (206 images), which are images of various types of vehicles such as cars, motorcycles, trucks, buses, and bicycles. The experimental results show a recognition performance of 88.5%. This study proposes a vehicle detection and recognition model based on the yolov8 model, combined with statistical analysis of different types of vehicles. This is an accurate, easy, and cost-effective method for detecting vehicles.

• Optimization of plant – based meat formulation from sensory properties using response surface methodoloy

  Nguyễn Thị Xuân Thuỳ, Nguyễn Phụng Tiên, Trần Hồng Quân (Author)

  Abstract | PDF (Vietnamese) | Views: 13 Downloads: 3

  The formulation of a plant-based meat (PBM) product from mung bean and wheat flour was optimized using Response Surface Methodology (RSM) with a Central Composite Design (CCD). Two independent variables were investigated with the ratio between mung bean (X₁) and wheat flour (X₂). The second-order regression models showed a good fit with the experimental data (R² = 0,84–0,97; p < 0,05; Lack of Fit > 0,05; CV < 2,5%), indicating high reliability. The optimal formulation was determined to be 30,00% mung bean and 3,86% wheat flour, with a desirability score of 0,735. The predicted sensory attributes were all rated highly: color (7,67); aroma (7,44); taste (7,44); texture (7,85); and overall acceptability (6,97). RSM proved to be effective in identifying the optimal processing formulation, contributing to the development of a PBM product with high sensory quality and strong potential for consumer acceptance.

• Study on the effect of the addition of nh₃ on the performance and emissions of a gasoline engine

  Minh Thiện Nguyễn, XUÂN PHONG TRỊNH, HỮU CHẤN HỒ (Author)

  Abstract | PDF (Vietnamese) | Views: 9 Downloads: 5

  This paper investigates the impact of partially replacing gasoline with NH₃ on combustion characteristics, engine performance, and emissions. The study considers variables such as NH₃ substitution ratio, power output, load, compression ratio, ignition timing, and hydrogen addition. At 4000 rpm, replacing gasoline with NH₃ at rates from 10% to 100% results in a power decrease of 1.9–22.3% and a fuel consumption increase of 5.9–128.3%. Emissions are significantly reduced: NOₓ by 5.1–20.6%, CO by 20–100%, and CO₂ by 10–40% across the power range.

• Sustainability in event management contribute To business operations of an agency

  Nguyễn Khắc Tường, Nguyễn Ngọc Hoàng Quyên, Trương Minh Phương, Trần Thu Mai, Nguyễn Công Kha, Nguyễn Thanh Hoàng (Author)

  Abstract | PDF (Vietnamese) | Views: 8 Downloads: 8

  The research topic Sustainability in Event management contribute to agency development serves as a method for the authors to observe, evaluate, and update theoretical premises, with the aim of producing research outcomes that are relevant for reference purposes. This supports researchers recognize the values that sustainable development brings to media enterprises and their stakeholders. By offering an insightful perspective on the issue from a specific agency, the authors provide an overview of the research issue within the enterprise. This demonstrates the factors influencing the formation and implementation of sustainable event management projects in the enterprise while highlighting the benefits of adopting sustainable management into the business model.