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All Journal Jurnal Teknik Mesin Turbo : Jurnal Program Studi Teknik Mesin Jurnal Elementer (Elektro dan Mesin Terapan) Angkasa: Jurnal Ilmiah Bidang Teknologi Vocatech : Vocational Education and Technology Journal International Journal of Aviation Science and Engineering Jurnal Rekayasa, Teknologi, dan Sains Jurnal Abdi Masyarakat Saburai (JAMS) Buguh: Jurnal Pengabdian Kepada Masyarakat Journal of Applied Science, Engineering and Technology (J. ASET) Jurnal Masyarakat Madani Indonesia Electrician : Jurnal Rekayasa dan Teknologi Elektro Jurnal Bakti Masyarakat Manajemen Jurnal Polimesin Journal of Physical Education Health and Sport
Ibrahim, Fauzi
Department Of Mechanical Engineering, Faculty Of Engineering, University Of Malahayati, Bandar Lampung, 35143, Lampung, Indonesia
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Materials Science & Nanotechnology Mechanical Engineering Public Health Social Sciences Transportation Other

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Analysis of Thermal Efficiency of the Honda GK5 Engine Fueled with Young Coconut Waste Bioethanol Using a Thermodynamic Approach Wahyudi, Retno; Ibrahim, Fauzi; Sembiring, Alexander; Apriyanto, Agus; Murti, Adam Wisnu; Putri, Novia Utami
VOCATECH: Vocational Education and Technology Journal Vol 7, No 1 (2025): August
Publisher : Akademi Komunitas Negeri Aceh Barat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.38038/vocatech.v7i1.214

Abstract

The global energy crisis and increasing awareness of the negative environmental impacts of fossil fuels have driven the development of sustainable alternative energy sources. One promising renewable fuel is bioethanol, especially when produced from agricultural waste such as young coconut waste. This study aims to evaluate the effect of using bioethanol derived from young coconut waste on the thermal efficiency of the Honda GK5 engine through thermodynamic analysis based on the Otto cycle model and verification using experimental data. The research method includes laboratory testing of the Honda GK5 engine with variations in fuel mixtures: E0, E10, E20, and E30. The test results show a significant increase in thermal efficiency up to the E20 mixture, with an experimental efficiency of 31.8% and a theoretical efficiency of 32.0%. This improvement is attributed to the high octane number of bioethanol, which supports more complete combustion. However, at the E30 mixture, a decrease in efficiency is observed due to the lower heating value of bioethanol. The Otto cycle model successfully represents the trend of thermal efficiency with an average deviation of 1–1.5% compared to experimental results. Therefore, bioethanol from young coconut waste proves not only to be environmentally friendly but also capable of enhancing engine energy performance optimally without requiring significant modifications.
Analisis Kinerja Komprehensive Sistem Pendingin Primer terhadap Efisiensi Pembangkit Listrik Tenaga Panas Bumi Tipe Flash Steam Apriyanto, Agus; Novia Utami Putri; Retno Wahyudi; Alexander Sembiring; Fauzi Ibrahim; Adam Wisnu Murti
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 19 No. 3 (2025)
Publisher : Department of Electrical Engineering, Faculty of Engineering, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/elc.v19n3.2855

Abstract

Abstract. Geothermal power plants rely heavily on the efficiency of their cooling systems to optimize overall energy conversion. This study investigates the performance of the primary cooling systems, namely direct contact condensers and mechanically induced flow cooling towers in Unit 3 of PT. Pertamina Geothermal Energy Tbk, Ulubelu Area, Lampung. Performance metrics are assessed using parameters such as range, approach, and effectiveness for the cooling tower, and thermal efficiency calculations for the condenser and steam turbine. Daily operational data were collected and analyzed. The results show that fluctuations in cooling tower effectiveness significantly affect condenser vacuum and turbine efficiency. The average actual cooling tower effectiveness is 70.06%, lower than the design effectiveness of 78%. The condenser shows an average thermal efficiency of 93.80%, with effectiveness variations between 83.23% to 86.44%. The turbine efficiency based on design is 87.51%, while the actual efficiency drops to the range of 81.84% to 82.48%. This decrease indicates a performance degradation of approximately 0.94% per year. This finding underlines the important role of cooling system optimization in improving the performance of geothermal power plants.
Peningkatan Pakan Ternak Berkualitas dengan Metode Pencampuran dan Penghalusan Mesin Disc Mill Portable di Pekon Mataram, Kecamatan Gading Rejo, Kabupaten Pringsewu Oktarina, Devi; Apriyanto, Agus; Ergantara, Rani Ismiarti; Natalina, Natalina; Ibrahim, Fauzi
JURNAL ABDI MASYARAKAT SABURAI Vol 6, No 02 (2025): JURNAL ABDI MASYARAKAT SABURAI
Publisher : Universitas Sang Bumi Ruwa Jurai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24967/jams.v6i02.4406

Abstract

Pekon Mataram di Kabupaten Pringsewu, Provinsi Lampung, merupakan salah satu sentra peternakan ayam ras petelur yang memiliki potensi ekonomi lokal cukup signifikan. Namun, mayoritas peternaknya masih menghadapi permasalahan mendasar, terutama terkait tingginya biaya produksi akibat ketergantungan pada pakan komersial serta keterbatasan dalam manajemen usaha dan pemasaran. Pengabdian ini bertujuan untuk meningkatkan efisiensi produksi dan kemandirian peternak melalui pemanfaatan teknologi tepat guna berupa mesin disc mill portable, pelatihan formulasi pakan mandiri berbasis bahan lokal, serta penguatan kapasitas manajerial dan pemasaran digital. Metode pelaksanaan mencakup kegiatan sosialisasi, pelatihan teknis dan manajerial, pendampingan intensif, dan evaluasi capaian. Hasil kegiatan menunjukkan bahwa 70 persen peternak mitra mampu mengoperasikan mesin secara mandiri, dan 80 persen telah mengimplementasikan formulasi pakan lokal. Selain itu, terjadi peningkatan produktivitas ternak sebesar 10–15 persen, penurunan biaya pakan hingga 30 persen, serta peningkatan kompetensi manajerial dan adopsi pemasaran digital oleh sebagian besar mitra. Program ini tidak hanya berdampak pada aspek teknis, tetapi juga mendorong terbentuknya kelembagaan peternak mandiri yang berorientasi pada keberlanjutan usaha. Dengan demikian, hasil pengabdian ini menunjukkan bahwa integrasi teknologi sederhana, pelatihan praktis, dan pemberdayaan berbasis komunitas dapat menjadi strategi efektif dalam meningkatkan daya saing peternak skala kecil di pedesaan. Model ini berpotensi direplikasi di wilayah lain dengan karakteristik serupa.
PENDAYAGUNAAN ALIRAN SUNGAI MENGGUNAKAN PLTA-PH SEBAGAI ENERGI TERBARUKAN UNTUK BUDIDAYA IKAN AIR TAWAR DI DUSUN SINAR NEGERI DESA NEGERI SAKTI KECAMATAN GEDONG TATAAN KABUPATEN PESAWARAN Ibrahim, Fauzi; Yonanda, Ahmad; Marsyad, Hardoyo
Jurnal Bakti Masyarakat Manajemen Vol 3, No 1 (2023): Volume 3 Nomor 1 Tahun 2023
Publisher : Program Studi Manajemen Fakultas Ekonomi dan Manajemen Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jbmm.v3i2.12934

Abstract

Dusun Sinar Negeri terdapat lokasi yang dekat dengan sumber mata air yang dimanfaatkan oleh sebagian warga untuk budidaya ikan air tawar. Hingga saat ini mata air tersebut digunakan warga hanya untuk kegiatan sehari – hari dan sumber utama air bagi kolam ikan. Peluang penerapan teknologi di dusun sinar negeri ini sangat diharapkan warga sekitar karena akan menunjang produktifitas warga. Peternak juga mengeluhkan belum adanya penerangan di sekitar kolam budidaya sehingga peternak ikan kesulitan dalam kegiatan maupun mobilitas malam hari. Potensi sumber daya alam dapat dimanfaatkan sebagai energi alternatif sebagai pembangkit listrik skala kecil yang ramah lingkungan.
PEMBUATAN ALAT PEMIPIL JAGUNG KERING PORTABLE UNTUK KELOMPOK TANI SIDE KARYE DUSUN YOGALAKA DESA SUMUR KECAMATAN KETAPANG KABUPATEN LAMPUNG SELATAN Ibrahim, Fauzi; Wardana, Marcelly Widya; Khikmawati, Emy
Jurnal Bakti Masyarakat Manajemen Vol 2, No 1 (2022): Volume 2 Nomor 1 Tahun 2022
Publisher : Program Studi Manajemen Fakultas Ekonomi dan Manajemen Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jbmm.v2i2.7993

Abstract

A corn Sheller Machine is a tool used to shell corn that has been dried to a moisture content of approximately 18% which is ready to be used as animal feed or for resale. In carrying out corn harvesting activities, home-scale corn farmers work on corn shelling using manual or traditional tools such as shelling by hand or simple tools (screwdrivers). Shelling in this way will require a lot of manpower, time, and small production capacity. Mechanical corn shelling is done by using a corn sheller machine. Sheller machines on the market use manual power. Shelling in this way will require a lot of energy and if the operation method is not correct and the moisture content of the shelled corn is not suitable, it will affect the viability of shelled corn kernels. This study aims to develop the design and application of a portable corn sheller tool with the help of a gasoline-fueled motor. In this case, researchers can find out how the tool works and find out the results of the corn sheller according to the level of the existing dry corn dose. The tools and materials used are very easy to obtain and can be given easy maintenance every month. It is hoped that this tool can help farmers work in terms of processing dry corn so that it can be worth the rupiah, keep the environment clean, and can maximize the potential of corn every year the annual harvest takes place.
PENANGANAN ABRASI PANTAI DENGAN PENANAMAN MANGROVE DI PANTAI KETAPANG Alansori, Apip; Luthfi, Muhamamad; Ibrahim, Fauzi; Prasetyo, Adi
Jurnal Bakti Masyarakat Manajemen Vol 4, No 2 (2024): Volume 4 Nomor 2 Tahun 2024
Publisher : Program Studi Manajemen Fakultas Ekonomi dan Manajemen Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jbmm.v2i1.7312

Abstract

Dengan adanya hutan mangrove pada sepanjang garis pantai tersebut diharapkan kestabilan pantai dapat terjaga. Mangrove dapat menjadi penyangga kelestarian ekosistem di pantai, dimana mangrove memungkinkan berlangsungnya kehidupan flora dan fauna di pantai tersebut. Selain itu, mangrove memberikan perlindungan pantai dari erosi/abrasi dan juga sebagai penahan dan perembesan air laut pasang, serta melindungi kawasan di belakangnya dari tiupan angin laut. Dengan peran mangrove di garis pantai yang sangat besar tersebut, maka sangat penting bagi masyarakat untuk ikut melestarikan hutan mangrove di garis pantai. Sebagai bentuk keikutsertaan tersebut, Mahasiswa/i Program Studi Akuntansi dan Teknik Mesin Universitas Malahayati melakukan kegiatan pengabdian masyarakat di pantai ketapang. Dengan harapan penanaman ini dapat terlaksana secara berkelanjutan dan merata sehingga dapat membantu melakukan penanaman mangrove sebagai solusi kearifan lokal untuk menjaga kestabilan garis pantai. 
THE EFFECT OF HOLDING TIME ON THE QUENCHING PROCESS IN COOLING WATER CIRCULATED ON AISI STEEL 1045 Ibrahim, Fauzi; Prasetyo, Adi; Hadi, Agung Efriyo; Ansyori, Anang
Jurnal Rekayasa Teknologi dan sains Vol 6, No 2 (2022): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v6i2.7055

Abstract

 ABSTRACT Quenching is a material cooling system to obtain certain desired properties. Quenching is carried out to maintain the mechanical properties associated with the crystal structure which will be lost on slow cooling. The method used is quenching in circulating cooling water media with specimens that have been prepared in the form of AISI 1045 steel. The results obtained are the hardness of AISI 1045 steel after going through the 850oC quenching process with holding times of 30, 45, and 60 minutes, an increase of 300% from the raw material. The application of AISI 1045 steel that has been quenched shows results or hardness values that are the main raw materials for gears, crankshafts, and light vehicle spare parts.  Keywords: quenching, AISI 1045 steel, circulating cooling.
REVIEW ON TITANIUM-BASED ALLOYS AS BIOMATERIALS FOR IMPLANT APPLICATIONS Prastyo, Adi; Ibrahim, Fauzi; Efriyo Hadi, Agung; Febrina, Rina; Winarno, Rudi; Ermasari, Anissa; Wahyudi, Retno
Jurnal Rekayasa Teknologi dan sains Vol 7, No 1 (2023): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v7i1.8762

Abstract

ABSTRACT Technological updates in the field of advanced materials research now tend to focus on biomedical materials application and utilization of Titanium and its alloys. Various of implant materials have been employed in various disciplines of medical science depending on the requirements of a particular application. Metals, alloys, ceramics, and polymers are the commonly used biomaterials. Titanium and its alloys are commonly used in almost all disciplines of medicine because of their sufficient biocompatibility and meeting of mechanical requirements. The main focus of this study is to review the various structural and microstructural properties of titanium and titanium-based alloys used as orthopedic implants. Orthopedic implants need to possess certain important qualities to ensure their safe and effective use. These properties like the biocompatibility, relevant mechanical properties, high corrosion and wear resistance and osseointegration are summarized in this review. Various attempts to improve upon these properties like different processing routes, surface modifications have also been inculcated in the paper to provide an insight into the extent of research and benefit that has been put into developing a highly superior titanium orthopedic implant. In addition, this paper also discusses in detail the various surface modification techniques to achieve superior biocompatibility, higher wear and corrosion resistance. Overall, an attempt has been made to bring out the current scenario of Ti based materials for biomedical applications. Keywords: titanium, implant, biomaterial.
Pengolahan Pakan Ternak Berkualitas dengan Mesin Mix-Chop Portable di Pekon Mataram Kecamatan Gading Rejo Kabupaten Pringsewu Natalina, Natalina; Ibrahim, Fauzi; Ergantara, Rani Ismiarti Ergantara; Wahyudi, Retno; Apriyanto, Agus; Putri, Novia Utami Putri; Sembiring, Alexander; Murti, Adam Wisnu
Jurnal Masyarakat Madani Indonesia Vol. 4 No. 4 (2025): November
Publisher : Alesha Media Digital

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59025/5h21q179

Abstract

Pekon Mataram di Kecamatan Gading Rejo, Kabupaten Pringsewu, Provinsi Lampung memiliki potensi besar di bidang pertanian dan peternakan, namun masih menghadapi keterbatasan dalam penyediaan pakan ternak berkualitas. Selama ini, peternak mengandalkan rumput liar yang tersedia melimpah, tetapi pemanfaatannya belum optimal karena proses pengolahan yang masih tradisional sehingga nilai gizi dan efisiensi pemakaiannya rendah. Untuk mengatasi permasalahan tersebut, kegiatan pemberdayaan masyarakat dilakukan melalui penerapan mesin mix-chop portable yang mampu mencacah dan mencampur rumput dengan bahan tambahan bergizi, disertai pelatihan pembuatan pakan fermentasi serta manajemen pemeliharaan ternak. Tujuan kegiatan ini adalah meningkatkan kualitas dan kuantitas pakan, memperbaiki manajemen usaha peternakan, serta memperluas akses pemasaran hasil ternak. Metode pelaksanaan meliputi sosialisasi, pelatihan, penerapan teknologi, pendampingan, dan evaluasi yang melibatkan partisipasi aktif peternak. Hasil kegiatan menunjukkan adanya peningkatan keterampilan peternak dalam mengolah pakan, efisiensi waktu dan tenaga, serta terbentuknya kelompok usaha bersama yang mendukung keberlanjutan program. Hasil kegiatan menunjukkan adanya peningkatan keterampilan peternak dalam mengolah pakan sebesar 80%, peningkatan efisiensi produksi hingga 50%, serta kenaikan rata-rata bobot ternak sapi sebesar 18%. Sebanyak 20 peserta pelatihan berhasil mengoperasikan mesin mix-chop dan memproduksi pakan fermentasi secara mandiri.
Effects of imagery training on Concentration and Performance of Karate Kata Athletes based on Gender Review Fauzi Ibrahim; Yadi Sunaryadi; Sagitarius; Mulyana
Journal of Physical Education Health and Sport Vol. 11 No. 2 (2024)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jpehs.v11i2.18768

Abstract

Psychological factors are one of the factors that support athlete performance. Therefore, there is a need for psychological training to overcome various psychological problems, especially the concentration and performance of karate athletes. This study aims to examine the effect of imagery training on the concentration and performance of kata karate athletes based on gender. This research uses an experimental method with a post-test only design. The sample used in this research was 10 karate kata Gokasi athletes from Bandung City, consisting of 5 female and 5 male athletes aged 11-13 years. Intensive imagery training was given as a research treatment, where they would imagine detailed word movements with an exercise duration of 10-15 minutes per session, frequency 3-4 times a week for 4 weeks. Measurements were carried out in two aspects, namely concentration using the Concentration Grid Test (CGT) and performance using the jury’s assessment through mini-events. Data analysis was carried out using the SPSS Version 27 statistical test. The results of the study showed that the impact of visualization training on the focus and performance of karate kata athletes, both male and female, varied greatly. Male athletes outperformed female athletes in the concentration variable, while female athletes outperformed male athletes in the performance variable. Thus, it can be said that imagination training is one of the exercises that can be used to help karate kata athletes, both male and female, to be more focused and perform better.
Co-Authors A.Yudi Eka Risano Adi Prasetyo Adi Prasetyo Adi Prastyo Agus Apriyanto Agus Sugiri Ahmad Riszal Ahmad Riszal Ahmad Yonanda Alansori, Apip Alexander Sembiring Amrizal Amrizal Anang Ansyori Apriyanto, Agus Arif Maulana Arifin Kusumo Wicaksono Atmoko, Ignatius Bayu Bayu Wibowo Dalimunthe, Ernando Rizki Dian Pratiwi Djuansjah, Joy Rizki Pangestu Efriyo Hadi, Agung Eko Yohanes Emy Khikmawati Ergantara, Rani Ismiarti Ergantara, Rani Ismiarti Ergantara Ermasari, Anissa Febrihadi, Ahmad Fauzan Fethma M Nor Hadi, Agung Efriyo Harmen Harmen Harmen Harmen Harnowo Supriadi, Harnowo Ignatius Bayu Atmoko Irza Sukmana Irza Sukmana Irza Sukmana Irza Sukmana, Irza Jasmawati, Noor Joy Rizki Pangestu Djuansjah Lukito Dwi Yuono Luthfi, Muhamamad M. Rangga Saputra Mahruri Arif Wicaksono Marcelly Widya Wardana Marjuni, Teuku Marsyad, Hardoyo Mohammad Badaruddin Mulyana Murti, Adam Wisnu Nafrizal Natalina Natalina Novia Utami Putri Nugraha, Nurcahya Oktarina, Devi Pranita, Elka Prastyo, Adi Putri, Novia Utami Putri Retno Wahyudi Rina Febrina, Rina Riszal, Ahmad Riszal, Akhmad Rizal Adi Saputra Sagitarius Sembiring, Alexander SUGIYANTO Sugiyanto - Sugiyanto Sugiyanto Tarkono Tarkono Tri Cahyo Wahyudi Tumpal Ojahan Rajagukguk Wahyu Wahyu Wahyudi, Retno Winarno, Rudi Yadi Sunaryadi Yanuar Burhanuddin Zulhanif