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All Journal Jurnal Review Pendidikan dan Pengajaran (JRPP) Jurnal Teknik Mesin Mechanical Xplore
Bertolomeus Haryanto Agung
Universitas Nusa Nipa
Automotive Engineering Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Social Sciences Other

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Ethanol additive addition to gasoline: viscosity investigation using stokes law linear regression Muhamad Taufik Ulhakim; Lestari Karina Chintya; Ade Suhara; Agung Bertolomeus Haryanto; Auliya Rahmatul Ummah; Arip Syaripudin Nur
Jurnal Teknik Mesin Mechanical Xplore Vol 4 No 1 (2023): Jurnal Teknik Mesin Mechanical Xplore (JTMMX)
Publisher : Mechanical Engineering Department Universitas Buana Perjuangan Karawang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36805/jtmmx.v4i1.5612

Abstract

Nowadays, global warming is a tremendous phenomena in the world. Every country trying to solve these conditions, including Indonesia that has a campaign to reduce the emission of CO and HC from vehicles. However, the number of vehicles is increasing every year. Based on that condition, the researchers are trying to modify the fuel with the additive. This work modified the gasoline with 10% ethanol additive addition and investigated the viscosity properties using Stokes law linear regression method and compared to pure gasoline. The viscosity properties are chosen by their effect on emission of vehicles. A low viscosity of fuel can reduce CO and HC in gas emission. Then, this work was finding that the viscosity of gasoline is decreased, but 10% of ethanol does not significantly change the characteristics of gasoline. Even so, the linear regression has successfully used as an analyzed method to determined the viscosity. Then, this finding also contributes to development of fuel in Indonesia to reduce the emission of CO and HC with the modified of gasoline using ethanol in the other concentration.
ANALISIS PENGGUNAAN MODEL PEMBELAJARAN INKUIRI TERBIMBING BERBASIS EKSPERIMEN TERHADAP KETERAMPILAN PROSES SAINS SISWA KELAS X SMA NEGERI 1 MAUMERE PADA MATERI ENERGI TERBARUKAN Sisilia Yulnesty Ina Sidok; Bertolomeus Haryanto Agung; Kristiana Nathalia Wea
Jurnal Review Pendidikan dan Pengajaran (JRPP) Vol. 7 No. 1 (2024): In-Progress Volume 7 No 1 Tahun 2024
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jrpp.v7i1.25661

Abstract

Keterampilan proses sains merupkan suatu aspek keterampilan yang penting bagi siswa guna mengaplikasikan dan mengembangkan konsep-konsep sains yang diperolehnya. Dalam upaya peningkatan kemampuan keterampilan proses sains siswa, diperlukan sebuah model pembelajaran yang sesuai. Pada penelitian ini digunakan model pembelajaran inkuiri terbimbing berbasis eksperimen. Penelitian ini bertujuan untuk menganalisis pengaruh penggunaan model pembelajaran inkuiri terbimbing berbasis eksperimen terhadap keterampilan proses sains siswa kelas X SMA Negeri 1 Maumere pada materi energi terbarukan. Penelitian menggunakan jenis penelitian deskriptif kualitatif. Dipilih 36 siswa dari kelas XF sebagai sampel dari keseluruhan siswa kelas X SMA Negeri 1 Maumere tahun pelajaran 2023/2024. Instrumen yang digunakan meliputi LKPD dan angket minat belajar. Data diperoleh dengan melakukan observasi saat pembelajaran dan menyebarkan angket setelah selesai pembelajaran. Berdasarkan hasil analisis data, penggunaan model pembelajaran inkuiri terbimbing berbasis eksperimen berdampak signifikan terhadap peningkatan minat belajar dan keterampilan proses sains siswa. Analisis LKPD menunjukkan bahwa rata-rata setiap indikator keterampilan proses sains dikategorikan tinggi dengan rata-rata ketercapaian sebsar 78,56%. Hasil analisis angket menunjukkan minat belajar siswa dapat dikategorikan sangat tinggi untuk keseluruhan indikator dengan rata-rata ketercapaiannya sebesar 82,51%.
Co-Authors Ade Suhara Arip Syaripudin Nur Auliya Rahmatul Ummah Lestari Karina Chintya Muhamad Taufik Ulhakim Nathalia Wea, Kristiana Sisilia Yulnesty Ina Sidok