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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Angkasa: Jurnal Ilmiah Bidang Teknologi Vocatech : Vocational Education and Technology Journal Jurnal Rekayasa, Teknologi, dan Sains Jurnal Abdi Masyarakat Saburai (JAMS) Jurnal Masyarakat Madani Indonesia Electrician : Jurnal Rekayasa dan Teknologi Elektro
Murti, Adam Wisnu
Unknown Affiliation
Humanities Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Earth & Planetary Sciences Education Electrical & Electronics Engineering Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Public Health Social Sciences

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The TLP 2-DOF as an alternative model for extreme wave application Akmal, Jamiatul; Lubis, Asnawi; Tanti, Novri; Nuryanto, Nuryanto; Murti, Adam Wisnu
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 18, No 2 (2021): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v18i2.37187

Abstract

Tension Leg Platform (TLP) is an offshore platform structure used for deep-sea oil and gas exploration. The main structure of the TLP consists of a deck, pontoon, mooring system, and foundation. TLP operates in a balance of buoyancy, structural weight, and mooring tension. The problem is the construction of TLP in the deep sea, where sometimes extreme waves appear could damage the TLP structure. This paper proposes a new model of TLP that is more stable to extreme waves. The method is to separate the mass of the deck and the mass of the pontoon into two flexible parts, which are connected by a cantilever spring system. Thus the TLP motion becomes two degrees of freedom (TLP 2-DOF). Using the dynamic vibration absorber (DVA) method, the ratio of the deck mass, pontoon mass, and spring stiffness are adjusted so that the primary mass movement is minimal. Furthermore, the ratio of the amplitude of the deck movement as the primary mass to the wave amplitude is analyzed, which is known as the operator response amplitude (RAO). The results showed that the TLP 2-DOF model was more stable. As an illustration, at resonance conditions, this model can reduce RAO to about 67%.
Management of Agricultural Machinery Ibrahim, Fauzi; Apriyanto, Agus; Murti, Adam Wisnu; Putri, Novia Utami
Jurnal Rekayasa Teknologi dan sains Vol 9, No 1 (2025): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v9i1.19098

Abstract

The integration of intelligent machinery and autonomous vehicles into agricultural operations offers opportunities for enhanced efficiency and reduced environmental impact. Innovations in sensing, actuation, and information and communication technologies (ICT) present significant potential for advancing agricultural practices. However, fully leveraging these advancements requires revisiting traditional agricultural machinery management processes. Conventional planning methodologies, such as job-shop scheduling, must be augmented with modern approaches like route optimization and sequential task scheduling. This review highlights current advancements and future needs in agricultural machinery management, focusing on five key management tasks across strategic, tactical, operational, and evaluative levels. The study identifies the importance of integrating these tasks with advanced tools and models to enable efficient and sustainable agricultural operations. Future directions emphasize adaptive planning, real-time decision-making, and enhanced system integration to address location-specific and environmental challenges.
Pemanfaatan Rechargeable Aluminium Air Battery Pada Panel Surya Jenis Polycrsytalline Sebagai Energi Alternatif Febrihadi, Ahmad Fauzan; Putri, Novia Utami; Pranita, Elka; Dalimunthe, Ernando Rizki; Murti, Adam Wisnu; Apriyanto, Agus; ibrahim, fauzi
Angkasa: Jurnal Ilmiah Bidang Teknologi Vol 17, No 1 (2025): Mei
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/angkasa.v17i1.2689

Abstract

Kebutuhan energi yang terus meningkat mendorong pengembangan sumber energi alternatif yang ramah lingkungan dan berkelanjutan. Salah satu solusi potensial adalah pemanfaatan rechargeable aluminium air battery yang memiliki kepadatan energi tinggi, aman, dan ramah lingkungan dibandingkan baterai konvensional seperti lithium-ion. Penelitian ini bertujuan untuk mengkaji integrasi panel surya polycrystalline dengan rechargeable aluminium air battery sebagai sistem penyimpanan dan penyedia energi alternatif, khususnya untuk aplikasi penerangan LED. Metode penelitian yang digunakan adalah metode eksperimen kuantitatif, dengan melakukan pengujian kinerja panel surya dan baterai aluminium udara secara langsung. Pengujian panel surya dilakukan selama dua hari dengan pengambilan data tegangan setiap jamnya, sementara pengujian baterai aluminium udara dilakukan dengan variasi jumlah sel baterai (5, 10, dan 15 sel) yang digunakan untuk menyalakan beban LED dalam konfigurasi paralel selama 12 jam, mulai pukul 18.00 hingga 06.00. Hasil pengujian baterai aluminium udara menunjukkan bahwa semakin banyak jumlah LED yang digunakan semakin besar konsumsi daya, sehingga menyebabkan penurunan tegangan dan arus yang lebih cepat. Pada konfigurasi 5 sel tegangan akhir tercatat sebesar 4,85 V hingga 4,09 V, pada 10 sel sebesar 7,33 V hingga 8,5 V, dan pada 15 sel sebesar 6,01 V hingga 7,26 V. Perbedaan ini menunjukkan bahwa rechargeable aluminium air battery mampu menyuplai energi sesuai kebutuhan beban, meskipun daya tahan sistem sangat dipengaruhi oleh jumlah sel baterai dan besar beban yang digunakan
Analisis Perbandingan Tegangan Pada Baterai Berbahan Baku Limbah Barubara dengan Kulit Pisang sebagai Energi Alternatif arif maulana; novia utami putri; adam wisnu murti; agus apriyanto; bayu wibowo; fauzi ibrahim
Electrician : Jurnal Rekayasa dan Teknologi Elektro Vol. 19 No. 1 (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.v19n1.2773

Abstract

Pelatihan Bisnis Digital Dan Teknologi Produksi Bagi Masyarakat Pekon Mataram Kecamatan Gading Rejo Kabupaten Pringsewu Provinsi Lampung Ibrahim, Fauzi; Putri, Novia Utami; Apriyanto, Agus; Murti, Adam Wisnu; Pratiwi, Dian; Wahyu, Wahyu
JURNAL ABDI MASYARAKAT SABURAI Vol 6, No 01 (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.v6i01.3946

Abstract

Program Pengabdian kepada Masyarakat (PKM) ini dilatarbelakangi oleh permasalahan rendahnya pemanfaatan teknologi dalam proses produksi dan pemasaran yang dihadapi oleh pelaku usaha mikro di Desa Mataram, Kecamatan Gading Rejo, Kabupaten Pringsewu. Masyarakat desa sebagian besar bergantung pada sektor pertanian dan usaha mikro, namun keterbatasan dalam akses teknologi, literasi keuangan, dan strategi pemasaran digital menyebabkan rendahnya daya saing produk mereka di pasar yang lebih luas. Kegiatan ini dilaksanakan di Balai Desa Mataram pada tanggal 31 Desember 2024 dengan tujuan untuk meningkatkan kapasitas ekonomi masyarakat melalui pelatihan dan pendampingan yang terintegrasi. Pelatihan mencakup tiga aspek utama, yaitu pelatihan teknologi produksi (penggunaan alat pengering dan pengemasan vakum), pelatihan manajemen usaha (literasi keuangan dan penyusunan rencana bisnis), serta pelatihan pemasaran digital (penggunaan media sosial, e-commerce, dan branding produk). Hasil kegiatan menunjukkan adanya peningkatan pemahaman dan keterampilan masyarakat mitra dalam mengadopsi teknologi dan strategi bisnis modern. Evaluasi menggunakan kuesioner menunjukkan peningkatan pemahaman hingga 80 persen setelah pelatihan. Program ini diharapkan mampu membangun ekosistem usaha berbasis digital yang mandiri dan berkelanjutan di desa, mendukung visi Smart Village.
Optimizing MATLAB Applications to Advance Automotive System Development Ibrahim, Fauzi; Hadi, Agung Efriyo; Marjuni, Teuku; Apriyanto, Agus; Putri, Novia Utami; Wahyudi, Retno; Sembiring, Alexander; Murti, Adam Wisnu
Jurnal Rekayasa Teknologi dan sains Vol 9, No 2 (2025): Jurnal Rekayasa, Teknologi, dan Sains
Publisher : Fakultas Teknik Universitas Malahayati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33024/jrets.v9i2.21385

Abstract

The automotive industry continues to evolve with the integration of sophisticated computational tools to optimize design, analysis, and control systems. MATLAB, known for its powerful numerical and simulation capabilities, has emerged as a key tool in achieving efficiency, accuracy, and automation across automotive engineering processes. This study explores the strategic utilization of MATLAB in areas such as engine modeling, vehicle dynamics simulation, embedded system development, and control system design. The research employs a qualitative method supported by case studies from various industrial applications, highlighting how MATLAB toolboxes like Simulink, Stateflow, and Simscape contribute to reducing development time and improving system performance. Results show that optimized MATLAB use not only accelerates prototyping and testing phases but also enhances precision in control strategies, especially for electric and autonomous vehicles. This paper concludes by emphasizing the growing importance of MATLAB proficiency among automotive engineers and its role in driving digital transformation in the industry. 
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.
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 (In Progress)
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.
Co-Authors Agus Apriyanto Alexander Sembiring Apriyanto, Agus Arif Maulana Asnawi Lubis Bayu Wibowo Dalimunthe, Ernando Rizki Dian Pratiwi Ergantara, Rani Ismiarti Ergantara Febrihadi, Ahmad Fauzan Hadi, Agung Efriyo Ibrahim, Fauzi Jamiatul Akmal Marjuni, Teuku Natalina Natalina Novia Utami Putri Novri Tanti, Novri Nuryanto Nuryanto Pranita, Elka Putri, Novia Utami Putri Retno Wahyudi Sembiring, Alexander Wahyu Wahyu Wahyudi, Retno