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All Journal Eksergi: Chemical Engineering Journal JPF : JURNAL PENDIDIKAN FISIKA IKRA-ITH ABDIMAS
Muhammad Syahri
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Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Industrial & Manufacturing Engineering Materials Science & Nanotechnology Physics

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Influence of dietyl ether on the mixture of biodiesel B50 Danang Jaya; Rico Mitchell Litaay; Ryan Ade Bagus; T.W. Widayati; Muhammad Syahri
Eksergi Vol 19, No 1 (2022)
Publisher : Prodi Teknik Kimia, Fakultas Teknologi Industri, UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/e.v19i1.6387

Abstract

Biodiesel is generally defined as monoalkyl esters of plant oils and animal fats. Oils derived from plants and animal fats and their derivatives have the possibility as a substitute for diesel fuel. This biodiesel is then mixed with diesel with a composition of 50% biodiesel and 50% diesel to make B50. In this study, B50 was then mixed with diethyl ether. The results of this study, obtained a mixture of B50+0% diethyl ether, B50+2% diethyl ether, B50+4% diethyl ether, B50+6% diethyl ether, B50+8% diethyl ether, B50+10% diethyl ether with kinematic viscosity (6.5 mm2/s, 6 mm2/s, 5.4 mm2/s, 5 mm2/s, 4.3 mm2/s, and 3.6 mm2/s), flash point (183 oC, 179 oC, 177 oC, 175 oC, 171 oC, and 167 oC), pour point (7 oC, 6 oC, 5 oC, 4 oC, 2 oC, and 1 oC), caloric value (10051,66 cal/m3, 10097,1322 cal/gram, 10128,13 cal/gram, 10170,38 cal/gram, 10235,37 cal/gram, and 10306,84 cal/gram), and density 15 oC (841.1 Kg/m3, 839.5 Kg/m3, 838.2 Kg/m3, 837 Kg/m3, 836.2 Kg/m3, dan 835.1 Kg/m3)
Pelatihan Pembuatan Profil Digital dan Pesan Dakwah Siswa (Pandawa) pada Sekolah Alam Tunas Mulia Bantargebang Saeful Mujab; Nasaruddin Siregar; Sari Endah Nursyamsi; Muhammad Syahri
IKRA-ITH ABDIMAS Vol. 8 No. 3 (2024): Jurnal IKRAITH-ABDIMAS Vol 8 No 3 November 2024
Publisher : Universitas Persada Indonesia YAI

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Kegiatan Pengabdian kepada Masyarakat (PKM) ini bertujuan untuk memperkenalkandan mengimplementasikan teknologi komunikasi digital pada siswa Sekolah Alam TunasMulia Bantargebang - Kota Bekasi. Yayasan Sekolah Alam Tunas Mulia Bantargebangmerupakan lembaga pendidikan gratis yang berkomitmen untuk memberikan aksespendidikan berkualitas bagi anak-anak pemulung di daerah Bantargebang. Di era digitalsaat ini, penting bagi lembaga pendidikan untuk memiliki profil digital yang baik agardapat meningkatkan visibilitas, menarik perhatian masyarakat, serta memudahkankomunikasi dengan orang tua. Oleh karena itu, kegiatan pengabdian kepada masyarakatini memberikan pelatihan kepada siswa untuk mengembangkan profil digital diri dansekolah mereka agar lebih informatif dan menarik. Melalui kegiatan ini diharapkanmampu meningkatkan kemampuan belajar siswa, dalam pemanfaatan teknologikomunikasi digital dan menciptakan lingkungan belajar yang lebih interaktif danmenyenangkan.
Enhancing Problem-Solving Abilities and Science Process Skills through Guided Inquiry with Laboratory Media in High School Rahman, Sunarti; Muhammad Syahri; Agus Tinus
Jurnal Pendidikan Fisika Vol. 13 No. 3 (2025): PENDIDIKAN FISIKA
Publisher : Universitas Muhammadiyah Makassar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26618/vn4kxv72

Abstract

Physics education at the high school level continues to face challenges in cultivating students’ higher-order thinking, particularly problem-solving ability and science process skills, which are essential for scientific literacy and future learning. Conventional lecture-based approaches often result in passive learning and limited opportunities for inquiry, creating an urgent need for innovative teaching strategies. This study aimed to investigate the effectiveness of guided inquiry supported by laboratory media in enhancing problem-solving ability and science process skills among high school students. Employing a quasi-experimental design with a pretest–posttest nonequivalent control group, the research was conducted with 64 Grade X students at SMAN 1 Gowa, Indonesia, who were divided into an experimental group taught through guided inquiry with laboratory media and a control group receiving traditional instruction. Data were collected using a validated problem-solving test and a science process skills assessment and analyzed using descriptive statistics, independent samples t-tests, and normalized gain (N-gain) scores. The results indicated that the experimental group achieved significantly higher improvements, with N-gain scores of 0.70 (high) for problem-solving and 0.50 (medium) for science process skills, compared with 0.60 and 0.38, respectively, in the control group. These findings confirm that guided inquiry combined with laboratory media provides a more effective learning environment by promoting active engagement, conceptual understanding, and procedural competence. The novelty of this study lies in its focus on the measurement topic in high school physics, an area often associated with analytical difficulty. The study concludes that this instructional model contributes to the advancement of physics education by offering empirical evidence for curriculum innovation and pedagogical reform.
Co-Authors Agus Tinus Danang Jaya Nasaruddin Siregar Nursyamsi , Sari Endah Rahman, Sunarti Rico Mitchell Litaay Ryan Ade Bagus Saeful Mujab T.W. Widayati