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All Journal Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin Jurnal Ilmiah Mandala Education (JIME) Community Development Journal: Jurnal Pengabdian Masyarakat
Catur Purnomo
Teknik Mesin Universitas Surakarta Jl. Raya Palur Km.5, Surakarta
Aerospace Engineering Arts Humanities Automotive Engineering Economics, Econometrics & Finance Education Health Professions Law, Crime, Criminology & Criminal Justice Mechanical Engineering Physics Public Health Social Sciences

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Kajian Pengaruh Fraksi Volume Serat Akibat Perlakuan Alkali Terhadap Ketangguhan Impak Komposit Limbah Serat Aren-Polyester Wijoyo, Wijoyo; Nurhidayat, Achmad; Purnomo, Catur
Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin Vol 1, No 2 (2011): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (337.106 KB)

Abstract

The purpose of this study is to investigate the influence of fiber volume fraction of the impact strength of palm fiber-unsaturated polyester composite and investigate the mechanism of fracture caused by impact loads. This research material is palm fiber (Arenga pinnata), unsaturated polyester matrix yukalac BQTN-EX 157 type, hardener metyl etyl ketone peroxide (MEKPO), alkali solution (NaOH) and H2O. Testing with Charpy impact tester, impact test specimens prepared according to standard test ASTM D-5942. While the macro picture is used for the analysis of the fracture. The results showed that the most optimum impact toughness of palm fiber-polyester composite reached 0.011 J/mm2 on volume fraction (Vf) 40%. While the interaction characteristics of palm-fiber bond strength polyester showed matrix cracking behavior of failure on volume fraction (Vf) 10% to 30%, and fiber pull out the volume fraction (Vf) 40% and 50%, the same fracture behavior between the matrix and fibers in volume fraction (Vf) 40% indicates that fiber and matrix has a strong bonding interaction.
Pengaruh Pembelajaran Daring Berbasis Whatsapp Dan Metode Pemberian Tugas Terhadap Motivasi Belajar Siswa di SMA Negeri 1 Kefamenanu Hendrik, Yandri Yusuf Cornelis; Pingak, Elisabeth M.; Purnomo, Catur
Jurnal Ilmiah Mandala Education (JIME) Vol 9, No 2 (2023): Jurnal Ilmiah Mandala Education (April)
Publisher : Lembaga Penelitian dan Pendidikan Mandala

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58258/jime.v9i2.4991

Abstract

The online learning implementation during the COVID-19 pandemic by using WhatsApp and assigning assignments as one of the methods used by teachers in providing material. The purpose of the study is to determine the effect of WhatsApp-based online learning and assignment methods on student learning motivation in PAK subjects at SMA Negeri 1 Kefamenanu. The research method is Quantitative Method. All students who are Christian is the population of this study.Total of 56 samples using proportional random sampling technique. The results showed that the online learning variable via WhatsApp has a positive and significant influence on students' learning motivation. The regression coefficient of 0.377 is positive with a t-count value of 3.156. The assignment method variable has positive and significant effect on students' learning motivation. The regression coefficient of 0.287 is positive with a t-count value of 2.130. The online learning variable and the assignment method simultaneously have a simultaneous effect on the F value of 4.343. While the resulting significance value is 0.018 which is smaller than 0.05 and contributes 14.1% to students' learning motivation.
Kajian Pengaruh Fraksi Volume Serat Akibat Perlakuan Alkali Terhadap Ketangguhan Impak Komposit Limbah Serat Aren-Polyester Wijoyo, Wijoyo; Nurhidayat, Achmad; Purnomo, Catur
Dinamika Teknik Mesin Vol 1, No 2 (2011): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The purpose of this study is to investigate the influence of fiber volume fraction of the impact strength of palm fiber-unsaturated polyester composite and investigate the mechanism of fracture caused by impact loads. This research material is palm fiber (Arenga pinnata), unsaturated polyester matrix yukalac BQTN-EX 157 type, hardener metyl etyl ketone peroxide (MEKPO), alkali solution (NaOH) and H2O. Testing with Charpy impact tester, impact test specimens prepared according to standard test ASTM D-5942. While the macro picture is used for the analysis of the fracture. The results showed that the most optimum impact toughness of palm fiber-polyester composite reached 0.011 J/mm2 on volume fraction (Vf) 40%. While the interaction characteristics of palm-fiber bond strength polyester showed matrix cracking behavior of failure on volume fraction (Vf) 10% to 30%, and fiber pull out the volume fraction (Vf) 40% and 50%, the same fracture behavior between the matrix and fibers in volume fraction (Vf) 40% indicates that fiber and matrix has a strong bonding interaction.
PEMBINAAN KARAKTER GENERASI MUDA MELALUI MODERASI BERAGAMA DI SMTK BENFOMENI KAPAN Boineno, Misael; Banamtuan, Maglon Ferdinand; Purnomo, Catur; Hermin, Hermin; Sole, Adriana I. S.; Notonis, Yulius Musa; Rissi, Cristian
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 6 (2024): Vol. 5 No. 6 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i6.38708

Abstract

Tujuan dari pengabdian kepada masyarakat ini bertujuan untuk mengaplikasikan pembiasaan generasi muda dalam moderasi beragama dengan sub tema memperkuat karakater bangsa dan menangkal radikalisme di Sekolah Menengah Teologi Kristen Benfomeni Kapan. Ada dua metode yang dipakai dalam melaksanakan pengabdian kepada masyarakat ini yakni: pertama, Seminar dan lokakarya dengan materi moderasi beragama, karakter bangsa, dan radikalisme. Kedua, kampanye media sosial dapat menggunakan berbagai platform media sosial, seperti Facebook, Twitter, dan Instagram, untuk menyebarkan informasi dan terlibat dengan audiens. Maka hasil yang diperoleh dalam melakukan pengabdian tersebut yakni: 1). analisis situasi: Sekolah Menengah Teologi Kristen Benfomeni Kapan merupakan salah satu Sekolah yang berada di desa O’Besi yang memiliki keragaman agama dan budaya. Kondisi ini berpotensi menimbulkan gesekan sosial jika tidak dikelola dengan baik. Beberapa tantangan yang dihadapi: a). Minimnya pemahaman tentang moderasi beragama; b). Pengaruh media sosial yang membawa paham radikal; dan c). Kurangnya ruang dialog antar pemuda berbeda agama; 2). Strategi Pembinaan meliputi: a). penguatan aspek kognitif; b). pengembangan aspek afektif, c). pemberdayaan aspek psikomotorik. 3). Dampak dan keberlanjutan. Sedangkan dari pengabdian kepada masyarakat ini dapat di simpulkan bahwa: Meningkatkan pemahaman pemuda tentang moderasi beragama; Memperkuat karakter kebangsaan; Membangun sistem pencegahan radikalisme berbasis komunitas; Menciptakan jaringan pemuda lintas agama; dan Menghasilkan role model pemuda moderat.
Co-Authors Achmad Nurhidayat Banamtuan, Maglon Ferdinand Boineno, Misael Hendrik, Yandri Yusuf Cornelis Hermin Hermin, Hermin Notonis, Yulius Musa Pingak, Elisabeth M. Rissi, Cristian Sole, Adriana I. S. W Wijoyo, W Wijoyo Wijoyo