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All Journal ARMATUR : Artikel Teknik Mesin dan Manufaktur Innovative: Journal Of Social Science Research
Christina Bastian
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Aerospace Engineering Humanities Automotive Engineering Computer Science & IT Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Mechanical Engineering Public Health Other

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Pengaruh Penggunaan Video Animasi Pembelajaran dengan Pendekatan Kontekstual terhadap Hasil dan Motivasi belajar Siswa di SD Inpres 19 Kota Sorong Sapulette, Rosa orpa; Korneles Viktor Ohoiwutun; Yulian Anouw; Disabella Dayera; Christina Bastian
Innovative: Journal Of Social Science Research Vol. 4 No. 4 (2024): Innovative: Journal Of Social Science Research
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/innovative.v4i4.16260

Abstract

Students in learning Mathematics often have difficulties. This is due to conventional learning from teachers. Mathematics learning media must be appropriate and interesting for students. The problem to be solved is about the description of interesting animated videos, the influence of the use of animated videos on learning outcomes and student learning motivation. The purpose is that students can be interested in learning mathematics and there is an increase in learning outcomes and student motivation. The results of the study showed that the average pretest and postest scores of students were 40.6 and 81.6 and the paired samples test was 0.000 smaller than the significant level of 0.05. So it can be concluded that there is a significant influence on student learning outcomes and motivation.
Analisis Pengaruh Penambahan Material Komposit Serat Kulit Durian Terhadap kekuatan Impak Batubata Christina Bastian; Yoel Pasae; Yafet Bontong; Yous Yamhin
ARMATUR : Artikel Teknik Mesin & Manufaktur Vol. 7 No. 2 (2026): Jurnal Armatur (in Progress)
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/armatur.v7i2.12427

Abstract

Brick is a durable, water-resistant construction material that reduces rainwater seepage through walls and offers fire resistance, making it safer to use. This study aims to analyze the effect of adding durian husk fiber to bricks. Durian husk fiber was selected due to its high cellulose content and potential as an eco-friendly natural reinforcing agent. Fiber treatment involved cold smoking (at 35°C–45°C) for varying durations—no smoking, 5 hours, 10 hours, 15 hours, and 20 hours—to enhance surface quality and bonding with the matrix. An experimental method was employed, utilizing varying volume fractions of clay, durian husk fiber, and cassava starch: 50%:10%:40%, 50%:20%:30%, and 50%:30%:20%. Specimens were fabricated using the hand lay-up method and oven-dried for one hour at 200°C. Impact strength was assessed using the Charpy Impact Test method in accordance with ASTM D5942-96 standards. The results indicate that the highest absorbed energy value (13.096 Joules) was achieved with the 50%:30%:20% volume fraction and a 5-hour smoking treatment, while the lowest value (6.976 Joules) was observed with the 50%:20%:30% volume fraction and a 10-hour smoking treatment. Similarly, the highest impact strength value (0.163 J/mm²) was recorded for the 50%:30%:20% volume fraction with 5 hours of smoking, and the lowest (0.087 J/mm²) for the 50%:20%:30% volume fraction with 10 hours of smoking. These findings demonstrate that material composition significantly influences brick toughness, where an optimal fiber addition enhances energy absorption and inhibits crack propagation. It can be concluded that a volume fraction composition of 50%:30%:20% represents the optimum condition for enhancing the impact strength of composite bricks based on durian husk fibers and a cassava starch matrix. An excessive increase in fiber fraction tends to reduce impact strength due to diminished matrix bonding and increased material porosity.
Co-Authors Disabella Dayera Korneles Viktor Ohoiwutun Rosa Orpa Sapulette Yafet Bontong Yoel Pasae Yous Yamhin