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All Journal JIPTEK : Jurnal Ilmiah Pendidikan Teknik dan Kejuruan International Journal of Pedagogy and Teacher Education Indonesian Journal of Applied Informatics
Bakar, Mohd. Shafie bin
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Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Engineering Mechanical Engineering Social Sciences

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The Optimization of Savonius Helix Wind Turbine Cut-in Speed with the Variation of Blades-twist Rotor and Number of Blades Prabowo, Handy; Wijayanto, Danar Susilo; Saputra, Taufik Wisnu; Bakar, Mohd. Shafie bin
JIPTEK: Jurnal Ilmiah Pendidikan Teknik dan Kejuruan Vol 16, No 2 (2023): July
Publisher : Faculty of Teacher Training and Education Universitas Sebelas Maret Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/jiptek.v16i2.71389

Abstract

Wind turbines are typically classified as Horizontal Axis Wind Turbines (HAWT) or Vertical Axis Wind Turbines (VAWT). VAWT has a superior ability to accelerate from rest to rotation than HAWT, allowing it to rotate the rotor even when the wind speed is low; additionally, the produced torque is relatively high. Using the Savonius helix VAWT is one of the numerous methods for enhancing VAWT performance. The effect of the number of blades and the blade twist of the rotor or the angle of rotation of the blades on the rotor from the bottom end to the top end on the speed cut generated by the VAWT Savonius helix was investigated experimentally. Variations in the number of blades used in the study included 2 and 3 blades, as well as 90°, 180°, 270°, and 360° for the rotor twist blades. In a wind tunnel, data was collected at wind speeds ranging from 0 to 5 m/s. The best performance research results were obtained With three blades, a twist angle of 180 degrees, and a cutting speed of 1.51 m/s. By modifying the Savonius Helix VAWT design in this study, it is possible to increase the efficiency and performance of turbines, mainly when used at low wind speeds, and the potential for using wind energy as a more efficient and sustainable alternative energy source.
Understanding Virtual Laboratories in Engineering Education: A Systematic Literature Review Wahyudi, Muhamad Nur Azmi; Budiyanto, Cucuk Wawan; Widiastuti, Indah; Hatta, Puspanda; Bakar, Mohd. Shafie bin
International Journal of Pedagogy and Teacher Education Vol 7, No 2 (2023): International Journal of Pedagogy and Teacher Education - October
Publisher : The Faculty of Teacher Training and Education (FKIP), Universitas Sebelas Maret, Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijpte.v7i2.85271

Abstract

Engineering education has gained significant importance in the 21st century due to its integration of essential technological literacy needed in our rapidly changing world. Laboratories, including virtual laboratories, allowstudents to apply theoretical knowledge practically. Virtual laboratories have emerged as innovative tools that offer increased accessibility and flexibility. This study reviewed 29 peer-reviewed journal articles indexed in Scopus and published between 2018 and 2023 on the use of virtual laboratories in engineering education. The research employed a systematic literature review framework, utilizing PRISMA for article selection.The findings indicate that virtual laboratories provide numerous benefits, including cost-effectiveness, flexibility, safety, and accessibility. They boost student motivation, engagement, and the ability to apply knowledge while effectively enhancing conceptual understanding and practical skills. Virtual laboratories support the development of pedagogical skills and promote careers in engineering by offering a comprehensive and inclusive learning environment.Despite these advantages, challenges likelimited interactivity, restricted content, and technical issues persist. Virtual laboratories are valuable supplements to traditional laboratories, providing an economical means to explore phenomena and offering a safe space for experimentation. Educators should consider the benefits and limitations ofintegrating virtual laboratories into their curriculum. This study aims to deepen the understanding of virtual laboratories in engineering education, advocating for their broader adoption as an innovative tool with a positive impact.  
Soil Temperature and Moisture Forecasting Using Exponential Smoothing Method Based on Mean Absolute Percentage Error Wahyudi, Muhamad Nur Azmi; Budiyanto, Cucuk Wawan; Bakar, Mohd. Shafie bin
IJAI (Indonesian Journal of Applied Informatics) Vol 8, No 2 (2024)
Publisher : Universitas Sebelas Maret

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20961/ijai.v8i2.73272

Abstract

Soil is an essential medium for almost all plants. Temperature and moisture in the soil become one of the factors that affect plant growth. Unbalanced or unfavorable soil conditions will adversely affect the plant. Therefore, soil conditions, including temperature and moisture, must be monitored to maintain plant health. Forecasting can be used to find out the soil condition in the future so that strategies can be prepared to deal with these conditions. This forecasting is carried out based on existing soil temperature and moisture data, which is then processed using the exponential smoothing method and mean absolute percentage error as a reference for the error rate or accuracy of the forecasting. The application of these methods succeeded in producing forecasting with very good overall accuracy.
Co-Authors Cucuk Wawan Budiyanto Danar Susilo Wijayanto Indah Widiastuti Prabowo, Handy Puspanda Hatta Saputra, Taufik Wisnu Wahyudi, Muhamad Nur Azmi