The demand for clean energy and efficient waste disposal has prompted increased studies in renewable energy sources such as biogas. This study explored ways to increase methane production through the anaerobic digestion watermelon peels, plantain peels, and cow dung. The onset of methane production for these substrates started between day 12 and day 16 reflecting the different compositions. Co-digestion of watermelon and plantain peels with cow dung enhanced biogas yields significantly by optimizing the balance of nutrients and minimizing the inhibitory impact of lignin and ammonia.......

Keywords: Biogas, methane, pH, co-digestion, plantain, watermelon, cow dung.

This research paper sought to explain the statistical model of institutional facilities in southwest states of Nigeria, a primary data was collected using the method of questionnaire to investigate whether the institutions has the capacities to cater for the students admitted into the various institutions. A bar chart was used to represent the response from the students and also, correlation was used to check for the modelling of the institution facilities it was observed that the probability values of the tested variables are 0.000 which is less than the significance value (0.05), we can conclude that, there is a relationship between academic performance and institutional facilities in southwest states of Nigeria.

This paper explores how digital science–technology and innovation are helping to create a sustainable productive force in Thai Nguyen, one of the leading provinces in the Northern Midlands and Mountainous Region of Vietnam. Based on ideas from Marxist–Leninist thought and the Party's policies, the study shows how digital science–technology, such as artificial intelligence (AI), the Internet of Things (IoT), and big data, has transformed productive forces in industry and agriculture......

Keywords: Science–technology, digital transformation, innovation, sustainable productive forces, Thai Nguyen, green economy.

This study presents a distributed batch processing model for understanding consumers purchase behavior. An intelligent system was developed and conducted to test the model. The results indicate that corporate social responsibility has a positive impact to purchase. Consumer's progressive decision making orientation has a positive impacts on purchase behavior. Social planning, and stakeholder integration positive impact to purchase behavior. According to the results of empirical study, implications and suggestion for future research are discussed.

Keywords: Artificial intelligent；Distributed；Batch Processing；Big Data.

The Switch Mode Power Supply (SMPS) has become a crucial component in modern electronic systems due to its high efficiency and ability to produce stable output voltage. However, the output stability of the JK-Link 120-12 type SMPS under varying load conditions and input voltage fluctuations has not been extensively analysed. This study aims to evaluate the output stability of the SMPS through an experimental approach by directly measuring variations in output voltage (Vout) caused by changes in simulated load percentages using a potentiometer......

Keywords: Switch Mode Power Supply; Output Voltage Stability; Load Variation; Pareto Diagram; Experimental Analysis.

The private economy is growing more important for Vietnam's development, especially in big cities like Hanoi. However, this sector still faces problems such as unclear laws, complicated government procedures, and limited access to money and technology. With the rapid changes in digital technology, especially with the Fourth Industrial Revolution, it's important to update and improve the system that supports the private sector to make it more effective and easier to use. This study looks at the basic ideas, reviews previous research, checks the current system in Hanoi, examines how digital changes are affecting things, and suggests ways to improve the system. The study finds that creating a modern system that uses digital tools in government and business support can help the private sector drive Hanoi's economy and society better.

Keywords: Private economy; Institutions; Hanoi; Digital transformation; Development policy.