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All Journal Rekayasa Mesin Dinamika Teknik Mesin : Jurnal Keilmuan dan Terapan Teknik Mesin SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Jurnal Abdi Insani Jurnal Bakti Nusa Journal of Business, Social and Technology Jurnal Pendidikan dan Pengabdian Masyarakat Jurnal Pengabdian Masyarakat Bangsa Protech Biosystems Journal Jurnal Polimesin
Sinarep Sinarep
Fakultas Teknik Universitas Mataram
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SOSIALISASI PEMBUATAN PUPUK KOMPOS DI DESA PIJOT UTARA, LOMBOK TIMUR Salman, Salman; sultan, Sultan; sinarep, Sinarep; Akbar, Zaenul; Salsananda, Dixie; Suksmadana, I Made Budi; Satiawan, I Nyoman Wahyu
Jurnal Bakti Nusa Vol. 6 No. 1 (2025): JURNAL BAKTI NUSA
Publisher : Jurusan Teknik Elektro Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/baktinusa.v6i1.142

Abstract

North Pijot Village, East Lombok has a problem with utilizing the organic waste, especially goat manure that has not been optimally utilized and has the potential to pollute the environment. The village community empowerment activity from the University of Mataram aims to overcome this problem by educating the community about the use of organic waste as a material for making compost. The activity methods include identifying problems, socialization and counseling, monitoring, filtering, harvesting/packaging. The results of the activity show that the North Pijot Village community has a better understanding of organic waste management and is able to spread composting techniques independently. This program not only contributes to reducing environmental pollution but also increases soil fertility and agricultural productivity. The sustainability of this program is expected to improve community welfare through more effective utilization of local resources.  
Pelatihan penggunaan mesin pencacah kotoran sapi dalam proses pembuatan pupuk organik di Desa Sesait Huda, Ahmad Akromul; Wirawan, Made; Sinarep, Sinarep; Setyawan, Paryanto Dwi; Pandiatmi, Pandri; Syahrul, Ahmad Ibrahim
SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Vol 9, No 5 (2025): September
Publisher : Universitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/jpmb.v9i5.33449

Abstract

Abstrak Desa Sesait menghadapi permasalahan pengelolaan limbah peternakan, khususnya kotoran sapi yang berpotensi mencemari lingkungan serta belum dimanfaatkan secara optimal. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pengetahuan dan keterampilan mitra, yakni Kelompok Tani Ingin Maju, dalam mengolah limbah kotoran sapi menjadi pupuk organik menggunakan teknologi tepat guna berupa mesin pencacah. Metode yang digunakan meliputi pelatihan partisipatif berbasis praktik langsung, dengan evaluasi melalui pretest dan posttest terhadap 20 peserta. Hasil evaluasi menunjukkan peningkatan pengetahuan peserta sebesar 52% dengan nilai rata-rata 91,50 dan keterampilan peserta yang mampu mengoperasikan mesin secara mandiri. Program ini memberikan dampak positif terhadap peningkatan keterampilan teknis masyarakat, efisiensi proses pembuatan pupuk organik, serta membuka peluang diversifikasi usaha pertanian. Pelatihan ini diharapkan menjadi langkah awal dalam mendorong pertanian berkelanjutan berbasis pemanfaatan limbah lokal. Kata kunci: limbah peternakan; pupuk organik; mesin pencacah; pelatihan. Abstract Desa Sesait menghadapi permasalahan pengelolaan limbah peternakan, khususnya kotoran sapi yang berpotensi mencemari lingkungan serta belum dimanfaatkan secara optimal. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk meningkatkan pengetahuan dan keterampilan mitra, yakni Kelompok Tani Ingin Maju, dalam mengolah limbah kotoran sapi menjadi pupuk organik menggunakan teknologi tepat guna berupa mesin pencacah. Metode yang digunakan meliputi pelatihan partisipatif berbasis praktik langsung, dengan evaluasi melalui pretest dan posttest terhadap 20 peserta. Hasil evaluasi menunjukkan peningkatan pengetahuan peserta sebesar 52% dengan nilai rata-rata 91,50 dan keterampilan peserta yang mampu mengoperasikan mesin secara mandiri. Program ini memberikan dampak positif terhadap peningkatan keterampilan teknis masyarakat, efisiensi proses pembuatan pupuk organik, serta membuka peluang diversifikasi usaha pertanian. Pelatihan ini diharapkan menjadi langkah awal dalam mendorong pertanian berkelanjutan berbasis pemanfaatan limbah lokal. Keywords: livestock waste; organic fertilizer; chopping machine; training.
Hybrid spot welding-epoxy bonding of AISI 1008 steel: Shear and nugget analysis Setyawan, Paryanto Dwi; Hakiki, Irfan; Sugiman, Sugiman; Salman, Salman; Sinarep, Sinarep; Maulana, Andi
Jurnal Polimesin Vol 23, No 5 (2025): October
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i5.7487

Abstract

The growing demand for lightweight, high-performance structures in transportation and manufacturing has intensified research on hybrid weld-bonding as a joining method that synergizes the metallurgical strength of resistance spot welding (RSW) with the stress-damping capability of adhesives. However, the interaction between welding parameters, adhesive type, and adhesive thickness and their collective influence on nugget microstructure and joint integrity remains poorly understood. This study addresses these gaps through a systematic parametric investigation of hybrid spot weld–epoxy joints in AISI 1008 steel. Three commercial epoxy adhesives (Araldite 5 min, Araldite 90 min, and Devcon 90 min) were applied at thicknesses of 0.2, 0.6, and 1.0 mm under a fixed RSW schedule (50 A, 10 s), followed by a secondary factorial test varying welding current (50-80 A) and time (10-20 s) for Araldite 5 min at 0.6 mm. Mechanical performance was evaluated via lap shear testing, while fracture morphology and nugget chemistry were analyzed using optical microscopy, SEM, and EDX. Results revealed an optimal configuration at 60 A and 10 s with 0.6 mm Araldite 5 min adhesive, achieving the highest shear strength (~5.74 kN). Strength exhibited a non-monotonic dependence on adhesive thickness, indicating coupled thermo-mechanical effects of polymer decomposition and stress redistribution. Fractographic analysis showed transitions from interfacial to cohesive failure modes with increasing adhesive thickness, while excessive welding energy induced HAZ softening and porosity. The study advances mechanistic understanding by correlating adhesive curing kinetics and thermal degradation with nugget evolution and joint mechanics. These findings provide both scientific insight and practical guidance for optimizing hybrid joining parameters in thin-gauge steel structures.
Analisis pemakaian bahan bakar biogas termurnikan pada unjuk kerja motor bakar Sutanto, Rudy; Wardani, Kusuma; Mulyanto, Arif; Nurchayati, Nurchayati; Pandiatmi, Pandri; Zainuri, Achmad; Sinarep, Sinarep
Dinamika Teknik Mesin Vol 7, No 1 (2017): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/dtm.v7i1.1

Abstract

The long term purpose of this research is to obtain the high quality renewable biogas that can be used as fuel for internal combustion engines to drive an electricity generator as energy diversification efforts in the area of small sustainable islands. The specific target expected to be achieved is a method/technique for absorbing impurities contained in biogas, especially CO2 component. The study was conducted to reduce the level of CO2 in biogas using NaOH solution. The mass flow rates of biogas employed were 2, 4, 6, 8 and 10 l/min. The biogas was then tested using an engine to see the effect CO2 on the engine performance at several rotations, i.e. 1500, 2500, 3500, and 4500 rpm. The results show that the torque increases by 21.3% for biogas B2 compared to the unpurified biogas. For biogas B4, the torque increases by 19.1%. While for biogas B6, B8, and B10, the torques increase by 14.9%, 12.8%, and 8.5% respectively. For biogas B2, the SFCE decreases by 33.4%, for biogas B4, the SFCE declines of about 22.7%, while for biogas B6, the SFCE declines by 17.9%. The SFCSs also decline by 13.9% and 8.5% for biogas B8 and B10.
KARAKTERISTIK KEKUATAN BENDING DAN KEKUATAN TEKAN KOMPOSIT SERAT HYBRID KAPAS/GELAS SEBAGAI PENGGANTI PRODUK KAYU Harsi, Harsi; Sari, Nazmi Herlina; Sinarep, Sinarep
Dinamika Teknik Mesin Vol 5, No 2 (2015): Dinamika Teknik Mesin: Jurnal Keilmuan dan Terapan Teknik Mesin
Publisher : Universitas Mataram

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

Abstract

Wood material is very popular in indonesia and all over the world, there are so many people who use it as their buildings contruction and also for their home tools, because the wood material is strong, long lasting, green living, save and lux. On the other hand the wood material will be mouldy if it meets water, thats why this material is not suitable to be placed in humid or wet places we need a new material that can be used as the subtitution of the wood material. The aim of this research is to know about how to make the composite of cotton/glass hybrid fiber and its mecanical using epoxy matrix, and then compare it with wood product. The wood product that used in this research is mahoni.The composite making is using hand lay-up method and the variety fraction volume of cotton fiber and glass fiber are : 30% : 0%, 25% : 5%, 20% : 10%, 15% : 15%, 10% : 20%, 5% : 25%, 0% : 30 %, the epoxy matrix volume fraction is 70 %, where the orientasion of cotton fiber is rondom and 2 cm in lenght, whereas the orientasion of the glass fiber is equally with fiber lenght up to the lenght of mould. The researcher did some test they are: bending test that based on ASTM D 790 standart, compression test that based on ASTM D 695 standart.The bending strenght’s mean of all volume fraction’s varieties of cotton/glass hybrid fiber composite shows the higher bending strenght than the bending strenght of mahoni which is used as the comparator. Afterwards the pressing strenght’s mean of cotton/glass hybrid fiber composite especially in  20%:10% and 0%:30% fraction volume varieties, which is have the values orderly 37,74 MPa and 47,53 MPa, and it shows the higher pressing strenght than the pressing strenght of mahoni, it is 36,78 MPa. Based on the recearch that have been done we can conclude that the characteristic of mechamical cotton/glass hybrid fiber composite can be used as the (alternative) wood subtitution especially mahoni.
Hardness and Microstructure Characteristics in Iron Sand Casting from Ampenan Beach with Used Canned Aluminum Alloy Habibi, Angga Wildan; Sinarep, Sinarep; Alit Triadi, Anak Agung
Journal of Business Social and Technology Vol. 6 No. 2 (2025): Journal of Business, Social and Technology
Publisher : Politeknik Siber Cerdika Internasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59261/jbt.v6i2.550

Abstract

Iron sand from Ampenan Beach, Lombok, which contains 74.5% Fe₃O₄, holds significant potential as a local raw material for metal casting. However, its mechanical properties, particularly hardness and microstructural uniformity, often require improvement for industrial applications. This study aims to investigate the effect of adding used aluminum can alloy on the hardness and microstructure of iron sand casting. The experiment was designed using a Completely Randomized Design (CRD) with aluminum content variations of 0%, 2%, 4%, 6%, and 8%, each repeated three times. The aluminum used was sourced from recycled beverage cans with a purity of 98.7%. Hardness tests were conducted using Brinell, Rockwell, and Vickers methods, while microstructure was analyzed through optical microscopy. The results showed that the addition of aluminum significantly increased material hardness, with the optimal result achieved at a 6% aluminum composition, resulting in a 28.8% increase in Brinell hardness compared to the control sample. Microstructural refinement was observed, with a grain size reduction from 50.0 μm at 0% Al to 25.0 μm at 6% Al, accompanied by the formation of a ferrite matrix with evenly distributed Al₄C₃ and Fe₃Al phases and a transformation in graphite morphology from lamellar to nodular. However, an excess of aluminum (8%) reduced hardness due to over-alloying and phase clustering. These findings suggest that optimizing the composition of recycled aluminum alloys can enhance the mechanical performance of locally sourced cast materials, supporting sustainable practices in metallurgy.
Co-Authors Achmad Zainuri Agus Dwi Catur Akbar, Zaenul Ali Imron, Muhamad Alit Triadi, Anak Agung Allo Padang, Yesung Andi Maulana, Andi Apriandi, M. Irawan Arif Mulyanto, Arif Aulia, Yesi Az-Zahro, Kholisatun Nafila Dwi Setyawan Habibi, Angga Wildan Hakiki, Irfan Harsi Harsi, Harsi Haryansyah, Anugrah Huda, Ahmad Akromul I Dewa Ketut Okariawan, I Dewa I Made Mara I Made Nuarsa, I Made I Nyoman Wahyu Satiawan Kamalia, Ima Karunia, Qorina KUSUMA WARDANI M. Mirmanto, M. Made Wirawan, Made Maharsa Pradityatama Maulana, Lalu Muhammad Septian Nanang Prayitno Nasmi Herlina Sari Nazmi Herlina Sari, Nazmi Herlina Nurchayati Nurchayati Pandri Pandiatmi Paryanto Dwi Setyawan Puad, Rae Nanda Azmi Rini Anggraini, Rini Rudy Sutanto Salman Salman Salsananda, Dixie Sari, Yolanda Rizky Permata Sugiman Sugiman Sujita, Sujita Suksmadana, I Made Budi Sultan . Sultan Sultan Suteja Suteja, Suteja Syahrul Syahrul Syahrul, Ahmad Ibrahim Syarif Hidayatullah Ulandari, Adelia Agustina Widiarta, I Made Abdi Yesung Allo Padang, Yesung Allo