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All Journal Jurnal Sains Matematika dan Statistika Sivitas : Jurnal Pengabdian dan Pemberdayaan Masyarakat Jurnal Didactical Mathematics
Purnama, Fahrul
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Religion Humanities Education Law, Crime, Criminology & Criminal Justice Mathematics Social Sciences Other

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Potential Utilization of Rice Husk Waste in Making Charcoal Briquettes in Kertamulya Village Purnama, Fahrul
Sivitas : Jurnal Pengabdian dan Pemberdayaan Masyarakat Vol. 6 No. 1 (2026): Jurnal SIVITAS : Jurnal Pengabdian dan Pemberdayaan Masyarakat
Publisher : Muttaqien Publishing Pusat Penelitian dan Pengabdian kepada Masyarakat STAI DR. KH.EZ. Muttaqien Purwakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52593/svs.06.1.03

Abstract

Rice husk is an agricultural waste that is still underutilized, even though it has great potential as a raw material for making charcoal briquettes. This study aims to examine the potential for utilizing rice husk as charcoal briquettes and to educate the people of Kertamulya Village about the manufacturing techniques. The method used in this study is a descriptive method with a socialization approach and direct training to the local community. The briquette making process involves several stages, namely burning the husk using the pyrolysis method, mixing with natural adhesives, molding, and drying. The results of the experiment showed that the composition of the mixture of materials and the right drying method greatly affect the quality of the briquettes produced. Briquettes with a ratio of 100 grams of starch, 1 kg of charcoal powder, and 400 ml of hot water gave the best results with stable combustion and long-lasting embers. In addition to contributing to reducing agricultural waste, this innovation also has economic value by opening up business opportunities for the community. Therefore, the use of rice husk as charcoal briquettes can be an environmentally friendly and sustainable alternative solution in supporting energy security and the welfare of rural communities.
Application of the Mamdani Fuzzy Inference System in Evaluating Traffic Accident Risk for Four-Wheeled Vehicles Purnama, Fahrul; Budiman, Indra; Azizah, Nur
Jurnal Sains Matematika dan Statistika Vol 12, No 1 (2026): JSMS Januari 2026
Publisher : Universitas Islam Negeri Sultan Syarif Kasim Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24014/jsms.v12i1.38351

Abstract

Traffic accidents involving four-wheeled vehicles constitute a complex problem influenced by multiple factors, including vehicle speed and traffic density. Accurate accident-risk assessment is essential to support preventive and control efforts on road networks. This study aims to design and implement an accident-risk evaluation model based on a Mamdani-type Fuzzy Inference System (FIS) to accommodate uncertainty in decision-making. The research procedure includes identifying input and output variables, constructing membership functions, fuzzification, formulating fuzzy rules, and performing inference and defuzzification. Testing results indicate that, for a combination of 80 km/h speed and 70 vehicles/km density, the centroid defuzzification method yields a risk value of 25.31%. This value falls within the low-to-moderate risk category. These findings suggest that the developed Mamdani FIS model is effective as a methodological approach for accident-risk evaluation.
Design and Evaluation of Canva for Education–Based Interactive Learning Media for Strengthening Students’ Mathematical Conceptual Understanding Purnama, Fahrul; Nabilah, Reisya Rahma; Nadia, Sisien Elsa; Sagala, Hana Lastiar Olivia; Astuti, Merlina Dwi; Kamilah, Zahra Nur; Imami, Adi Ihsan
Didactical Mathematics Vol. 8 No. 1 (2026): April 2026
Publisher : Program Studi Pendidikan Matematika, Universitas Majalengka

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31949/dm.v8i1.16515

Abstract

Students’ difficulties in understanding mathematical concepts, particularly negative integer operations, are often rooted in teacher-centered instructional practices that provide limited opportunities for conceptual exploration and active engagement. This study aimed to develop and evaluate interactive mathematics learning media based on Canva for Education to enhance students’ conceptual understanding. Employing a Research and Development (R&D) approach guided by the ADDIE model, the study was conducted through five stages: analysis, design, development, implementation, and evaluation. The analysis stage involved diagnostic testing, classroom observations, and a review of school readiness, revealing that 65.62% of students experienced conceptual difficulties. The developed product was an interactive PowerPoint-based learning medium that focused on conceptual visualization, guided examples, and interactive quizzes. Expert validation confirmed high content validity and instructional quality, while revisions were made to improve interactivity and technical usability. The implementation involved a classroom trial with 32 Grade VII students at a junior high school in Karawang. Results indicated a significant improvement in learning outcomes, with average test scores increasing from 60.78 (pre-test) to 76.73 (post-test), representing a gain of 15.95 points (26.2%). The practicality evaluation yielded an overall score of 80.93%, categorized as practical, supported by positive student responses and adequate teacher readiness. These findings demonstrate that Canva for Education–based interactive learning media developed using the ADDIE model are valid, practical, and effective in supporting students’ conceptual understanding of mathematics, offering a promising instructional solution for secondary education contexts.
Co-Authors Adi Ihsan Imami Astuti, Merlina Dwi Indra Budiman Kamilah, Zahra Nur Nabilah, Reisya Rahma Nadia, Sisien Elsa Nur Azizah Sagala, Hana Lastiar Olivia