Penggunaan smartphone di kalangan pelajar sebagian besar digunakan untuk mengakses jejaring sosial dan belum menggunakan smartphone dalam poroses pembelajaran. Tujuan Penelitian ini untuk merancang media pembelajaran mobile learning pada mata pelajaran simulasi digital berbasis android. Model yang digunakan adalah Instructional Development Institute (IDI) dalam metode pengembangan Research and Development (R&D). Hasil penelitian ini menunjukkan bahwa mobile learning berbasis android untuk mata pelajaran simulasi digital ini layak untuk dimanfaatkan sebagai media pendukung pembelajaran mandiri, sesuai dengan pengujian yang dilakukan terhadap aspek materi dan desain yang diujikan ke siswa didapatkan hasil untuk kelas kontrol sebesar 74,125% dan eksperimen sebesar 83,25%. Sehingga dapat diambil kesimpulan penggunaan media mobile learning berbasis android ini valid, praktis dan efektif digunakan pada mata pelajaran simulasi digital. Mobile learning simulasi digital ini dapat meningkatkan minat belajar siswa dan juga meningkatkan hasil belajar siswa. Diharapkan untuk guru dan kepala sekolah SMKN 2 Padang agar dapat mempergunakan mobile learning dalam pembelajaran.Kata kunci: mobile learning, research and development, simulasi digital Development of learning media based on mobile learning in digital simulation subjectsAbstractThe use of smartphones among students is mostly used to access social networks and have not used smartphones in learning processes. The purpose of this study is to support mobile learning media on android-based digital learning. The model used is the Instructional Development Institute (IDI) in the Research and Development (R&D) development method. The results of this study indicate that android-based mobile learning for digital simulation subjects is feasible to be used as a supporting medium for independent learning, in accordance with tests conducted on material and design aspects that are tested for students who obtain results for the control class by 74.125% and trials for 83, 25%. It can be concluded that the use of mobile learning media based on Android is valid, practical and effective in digital simulation lessons. This digital simulation of mobile learning can increase student learning interest and also improve student learning outcomes. It is expected that teachers and principals of SMKN 2 Padang can use mobile learning in learning.Keywords: mobile learning, research and development, digital simulation

Sustainable development goals not only contributes towards a clean environment but also towards better climatic conditions. Within Asia next to China and India, the Association of Southeast Asian Nations (ASEAN) are the actively developing countries in terms of economy and technologies. On the verge of achieving development, the ASEAN countries highly depend on fossil fuels for their energy needs. The ASEAN countries have taken visionary steps towards increasing the renewable energy mix with the conventional grid without hampering the ongoing development; this study presents the solar energy utilization policies, potential, progresses, and challenges adopted in ASEAN countries; furthermore, in these nations there is a huge potential of solar energy being located near the equator, therefore, they should focus on both solar to electrical and solar to thermal energy applications; however, in order to meet the peak demand and ensure the reliability of renewable energy like solar power, the development of advanced energy storage systems could be the key areas, and concrete efforts are required. Therefore, this article is a spotlight on government policies and goals focusing on energy potential, major progress in terms of energy storage and challenges in implementation of renewable energy systems in ASEAN countries; furthermore the recommended highlights on policies to accelerate the exploitation of renewable energy usage among the people are also discussed in detail, besides, the insights on reduction of carbon footprints over the next decade through incorporation of advanced energy storage systems. The issues discussed in this article will be helpful for exploring the desired energy storage systems and energy policies to be followed, which will eventually attract the stakeholders for small and medium-scale entrepreneurs for the development of renewable energy business in the region, if implemented on the ground.

This paper describes a control method for single- phase grid-connected inverter system for distributed generation application. Single-band Hysteresis Current Controller is applied as the control method. The control algorithm is implemented in digital signal processor (DSP) TMS320F2812. The control method provides robust current regulation and achieve unity power factor. Simulation and experimental results are provided to demonstrate the effectiveness of the design.

This paper describes a control method for single-phase transformerless grid-connected inverter system for photovoltaic (PV) application. The system consists of a DC-DC Boost Converter and a full-bridge inverter. The DC-DC Boost Converter implements a Sensorless Maximum Power Point Tracker (MPPT) algorithm with regulated DC bus voltage while the full-bridge inverter implements a Hysteresis Current Control as the control method. These control method provides robust current regulation, achieve unity power factor, low THD and optimize the PV energy extraction suitable for grid connected PV systems. Simulation and experimental results are provided to demonstrate the effectiveness of the design.

The increasing need for effective learning evaluation in higher education is driving the development of big data-based systems to provide comprehensive insights. This research aims at developing an Intelligent Learning Evaluation System (ILES) to support team teaching and monitor the effectiveness of the learning process through pre-tests, post-tests and periodic evaluations. The system was developed using the Agile methodology, including iterative stages of requirements gathering, design, development, testing and implementation. Codeigniter is used for backend development, PostgreSQL as database. This system enables dynamic monitoring and evaluation of teaching performance and student learning outcomes. The finding showed that the Real-time data visualization and user-friendly dashboards improve decision making for faculty and administrators. Testing shows increased engagement and actionable insights for performance improvement. ILES demonstrates the potential of big data in higher education by enabling data-based decision making and driving continuous improvement in teaching and learning. Future research will explore integration with broader institutional systems and its scalability