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All Journal Jurnal Pendidikan Teknologi dan Kejuruan Jurnal Rekayasa Material, Manufaktur & Energi Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik Jurnal Vokasi Mekanika Journal of Engineering Researcher and Lecturer J-CoSE: Journal of Community Service & Empowerment
Rahmadiawan, Dieter
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Aerospace Engineering Humanities Chemical Engineering, Chemistry & Bioengineering Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Mechanical Engineering Social Sciences Other

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Peningkatan Produktivitas Pertanian Padi di Kenagarian Parit Melalui Inovasi Mesin Perontok Padi Sistem Lorong Hembus Arafat, Andril; Irzal, Irzal; Adri, Junil; Syahri, Budi; Rahmadiawan, Dieter
Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Vol 23, No 1 (2023): Suluah Bendang: Jurnal Ilmiah Pengabdian kepada Masyarakat
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/sb.02990

Abstract

Permasalahan yang dihadapi Indonesia pada tahun 2020-2021 adalah minimnya produksi pangan yang mengakibatkan Indonesia harus melakukan Import beras dari negara tetangga. Hal ini dimungkinkan karena masih belum serius dalam mengatasi permasalahan-permasalahan yang dihadapi petani. Kabupaten Pasaman Barat merupakan salah satu daerah perbatasan provinsi Sumatera Barat yang luas akan lahan pertaniannya. Salah satu wilayah di Pasaman Barat yang mayoritas masyarakatnya bertani padi adalah Kenagarian Parit. Para petani padi di Kenagarian Parit masih banyak menghadapi permasalahan-permasalahan dalam penangan padi, terutama pada pasca panen. Dari pemantauan tim pengabdian dan info yang didapatkan dari kelompok tani KWT-Bundo Ramai Sejahtera, petani masih kekurangan alat dalam penanganan pada pasca panen, sehingga petani masih banyak melakukan perontokan dengan cara memukulkan padi pada alat yang masih sederhana. Kegiatan yang bersifat konvensional ini menjadikan lambatnya penanganan padi pada pasca penen. Dampak dari keterlambatan penanganan pada pasca panen dapat mengakibatkan susut hasil panen dan menurunnya kualitas gabah. Pelaksanaan pengabdian kepada masyarakat telah dilaksanakan terhadap masyarakat khalayak sasaran. Dalam pelaksanaan tujuan kegiatan telah tercapai. Dari evalusai yang dilakukan telah terjadi peningkatan pengatahuan masyarakat di Kenagarian Parit untuk memanfaatkan teknologi pada penanganan padi pada pasca panen. Peningkatan nilai ekonomis yang dihasilkan diharapkan dapat meningkatkan kesejahteraan masyarakat yang ada di Kenagarian Parit.
Comparison of NaOH and Na2CO3 as absorbents for CO2 absorption in carbon capture and storage technology Dinul, Fadhilah Ikhsan; Nurdin, Hendri; Rahmadiawan, Dieter; Nasruddin; Laghari, Imtiaz Ali; Elshaarani, Tarig
Journal of Engineering Researcher and Lecturer Vol. 2 No. 1 (2023): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v2i1.23

Abstract

CO2 gas is a greenhouse gas that causes global warming. Greenhouse gases are gases in the atmosphere that can absorb and reflect infrared radiation from the Earth's surface. Currently, the energy demand still depends on fossil fuels. On the other hand, CO2 emissions from burning fossil fuels continue to increase and contribute as greenhouse gases to the atmosphere. CO2 capture is an effort to reduce the burden of CO2 emissions into the atmosphere and is part of the Carbon, Capture, and Storage (CCS) protocol. The CO2 absorption process applied in the chemical industry is one of the CO2 absorptions using NaOH and Na2CO3 solutions as absorbents. This research aims to determine the effect of absorbent flow rate on the percentage of absorbed CO2. The method used in this research is the SLR (Systematic Literature Review) method to identify all available research. The absorbent flow rate variations used are 1 liter/minute, 1.5 liters/minute, 2 liters/minute, 2.5 liters/minute, and 3 liters/minute. The absorption process using NaOH absorbent is capable of absorbing CO2 gas with a maximum absorption of 95.52% and a minimum of 79.14%. Meanwhile, in the Na2CO3 absorbent, it is capable of absorbing CO2 gas with a maximum amount absorbed of 72.45% and a minimum of 35.47%.
Study of the effective fraction of areca nut husk fibre composites based on mechanical properties Akbar, Irfan Muhammad; Fauza, Anna Niska; Abadi, Zainal; Rahmadiawan, Dieter
Journal of Engineering Researcher and Lecturer Vol. 3 No. 1 (2024): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v3i1.126

Abstract

Areca nut husk fibers have the potential to be used as reinforcement in polymer composites as a substitute for synthetic fibres. In the manufacture of fibre composites, one of the important factors in determining the strength is the matrix to fibre ratio. This study aims to determine the effective ratio or fraction between areca nut husk fibre and orthophthalic polyester resin. Before using areca nut husk fibre, it was chemically treated so that only cellulose remained in the fibre. The areca nut husk fibre was processed into sheets. The composite was manufactured using the hand lay-up technique. Tensile and flexural tests were carried out to determine the mechanical properties. Based on the results of the tests conducted, there are differences in the mechanical properties of the composites. The tensile test results show that the 40% fibre fraction has the highest tensile strength and modulus values. On the other hand, in the flexure tests, the highest tensile strength and modulus values are found in the 30% fibre fraction.
Enhanced tribological performance of PLA/CNC composites: A comparison with phenolic resin and nylon Hsieh, Chia-Feng; Shi, Shih-Chen; Rahmadiawan, Dieter
Journal of Engineering Researcher and Lecturer Vol. 3 No. 3 (2024): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v3i3.169

Abstract

PLA has been developed to replace plastic because it is degradable. For more advanced applications, more research is needed on PLA. This study investigates the tribological properties of phenolic resin, nylon, and PLA/CNC composites under varying sliding distances and loads. Both phenolic resin and nylon demonstrate exceptional wear resistance and stable friction coefficients. PLA/CNC composites exhibit improved wear resistance, showing a 17% reduction in friction coefficient at a 3 wt.% CNC content. While the wear volume of PLA/CNC composites increases with sliding distance, the addition of CNC enhances PLA’s self-lubricating properties and overall wear resistance. The correlation between dissipated energy and wear volume confirms that higher CNC content significantly improves the durability of PLA. These findings suggest that CNC has considerable potential as an additive to enhance the tribological performance of PLA composites, making it a valuable material for various applications requiring superior wear resistance.
PENERAPAN ALAT PENCACAH LIMBAH SERAI WANGI DALAM UPAYA PENINGKATAN PRODUKTIVITAS MASYARAKAT DI NAGARI SIMAWANG Nurdin, Hendri; Rahmadiawan, Dieter; Fauza, Anna Niska; Sari, Delima Yanti; Fikri, M
Jurnal Vokasi Mekanika (VoMek) Vol 6 No 1 (2024): Jurnal Vokasi Mekanika
Publisher : Departemen Teknik Mesin Fakultas Teknik Unversitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/vomek.v6i1.609

Abstract

Tanaman serai wangi merupakan komoditi perkebunan yang dapat menghasilkan minyak atsiri. Dalam proses penyulingan tanaman serai wangi untuk mendapatkan minyak atsiri. Setelah proses penyulingan yang pada akhirnya menghasilkan limbah serai wangi. Petani belum mampu mengatasi permasalahan limbah tersebut. Masyarakat melakukan perajangan limbah untuk campuran pakan ternak, menjadikannya pupuk kompos untuk tanaman, dijadikan bahan bakar dengan dibakar langsung sehingga berdampak terhadap lingkungan dan menimbulkan polusi udara. Permasalahan ini membutuhkan penyelesaian dengan metode pendekatan sebagai solusi. Penerapan teknologi berupa alat pencacah limbah serai wangi sebagai upaya dalam meningkatkan produktifitas masyarakat di Nagari Simawang. Kegiatan penerapan teknologi kepada kelompok masyarakat mitra dirancang dalam pelaksanaan Program Kemitraan Masyarakat. Kegiatan yang dilakukan mulai dari persiapan dan perencanaan sampai dengan evaluasi pelaksanaan. Keberhasil melakukan penerapan alat pencacah serai wangi yang efisien serta konstruktif dengan kapasitas alat mencapai 34 kg/jam. Efektifitas penerapan alat mencapai 95% dalam menghasilkan pencacahan. Penerapan teknologi ini dapat berdampak terhadap peningkatan kesejahteraan dan peningkatan pemberdayaan masyarakat dan membangun wawasan masyarakat. Implementasi Program Kemitraan Masyarakat dengan pengembangan teknologi tepat guna kepada masyarakat di Nagari Simawang dapat keberlanjutannya dan bersinergi di tengah masyarakat.
Enhancing biodegradable polymer surface wettability properties through atmospheric plasma treatment and nanocellulose incorporation Shi, Shih-Chen; Hsieh, Chia-Feng; Rahmadiawan, Dieter
Jurnal Pendidikan Teknologi Kejuruan Vol 7 No 2 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v7i2.36723

Abstract

This study investigates the effects of atmospheric plasma treatment on the surface properties of polylactic acid (PLA)/nanocrystalline cellulose (CNC) composites, aiming to improve their wettability and mechanical properties. The research utilizes a twin-screw extrusion process for fabricating PLA/CNC biocomposites, followed by surface modification using a custom-built, with a tenfold high-voltage atmospheric plasma system. The motivation of this treatment was to improved surface wettability and potential for enhanced adhesive bonding in ecological applications. These findings contribute to developing more sustainable composite materials by providing a method to improve the functionality of biodegradable polymers without compromising their environmental benefits.
Revolutionizing polymethyl methacrylate toughness: Achieving 190% improvement with nanocellulose reinforcement while maintaining optical clarity Liu, Guan-Ting; Shi, Shih-Chen; Rahmadiawan, Dieter
Jurnal Pendidikan Teknologi Kejuruan Vol 7 No 4 (2024): Regular Issue
Publisher : Universitas Negeri Padang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24036/jptk.v7i4.39823

Abstract

Polymethyl methacrylate (PMMA) is widely used in applications requiring high transparency and durability, such as optical lenses and protective coatings. However, its inherent brittleness limits its application in high-impact environments. This study investigates the incorporation of cellulose nanocrystals (CNCs) into PMMA to significantly enhance its toughness without compromising its optical clarity. By reinforcing PMMA with CNCs, the nanocomposites exhibited a remarkable 190% increase in toughness while maintaining 90% optical transparency. The innovation lies in achieving a balance between toughness and transparency through controlled CNC dispersion within the PMMA matrix, which minimizes excessive bonding that could lead to brittleness. Proper CNC dispersion was achieved through in-situ polymerization, allowing the nanocrystals to interact with the polymer matrix through van der Waals forces rather than covalent bonds. This approach reduces stress concentration and mitigates the formation of defects in the polymer matrix, ultimately leading to a tougher, more flexible material. In addition to enhancing mechanical properties, this study underscores the importance of controlling CNC content to preserve the intrinsic optical transparency of PMMA. These findings open new possibilities for CNC-reinforced PMMA in advanced applications that demand high mechanical performance coupled with excellent optical properties, extending its use in fields such as medical devices, protective coatings, and transparent structural materials.
Co-Authors A, Yufrizal Abral, Hairul Akbar, Irfan Muhammad Anne Zulfia Arafat, Andril Arya Rudi Nasution Budi Syahri Delima Yanti Sari Dinul, Fadhilah Ikhsan Donny Fernandez Eko Indrawan Elshaarani, Tarig Fajar Ramadhan, Fajar Fauza, Anna Niska Fikri, M Hsieh, Chia-Feng ilham yuliady Ilhamsyah, Febrian Irzal, Irzal Junil Adri Laghari, Imtiaz Ali Liu, Guan-Ting Nasruddin Nurdin Hendri Oktaviani, Adinda Rahmadani Rahmadani Rudi Kurniawan Shi, Shih-Chen Wanda Afnison Yeni Putri, Elviza Yolli Fernanda Zahrul Fuadi Zainal Abadi Zhuang, Wei-Ting