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All Journal Jurnal Mechanical Jurnal Ilmiah Satyagraha JAMETECH Daiwi Widya : Jurnal Pendidikan FKIP Unipas
I Nyoman Suparta
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Automotive Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Social Sciences

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Karakteristik Campuran Solar dan Hasil Daur Ulang Oli Bekas sebagai Bahan Bakar Mesin Diesel Ainul Ghurri; SPG Gunawan Tista; I Nyoman Suparta
JURNAL MECHANICAL Vol 8, No 2 (2017)
Publisher : Jurusan Teknik Mesin, Fakultas Teknik, Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/mech.v8.i2.201710

Abstract

A processing of waste lubrication oil to diesel-like fuel was conducted through precipitating, heating and blending the waste oil with H2SO4. NaOH is then added to neutralize the acidic of the blends. The diesel-like fuel from waste oil processing is then mixed with standard diesel fuel containing 40%-60%, 50%-50%, and 60%-40% diesel-like fuel and standard diesel fuel, respectively. The results showed that from the point of view of the calorific value, the content of 40% and 50% diesel-like fuel are still within the allowable range. From the density side the pure diesel-like fuel is still within the allowable range. In related to the viscosity characteristic, the content of 40% diesel-like fuel is the upper limit to be recommended for using in common diesel engine. Keywords: Diesel-like fuel, standard diesel fuel.AbstrakStudi eksperimental pendauran ulang oli bekas menjadi bahan bakar diesel telah dilaksanakan dengan proses fisik dan kimiawi dengan membuang endapan dalam oli bekas diikuti dengan pemanasan untuk menguapkan kandungan air, serta pencampuran dengan asam sulfat (H2SO4) dan natrium hidroksida (NaOH) untuk lebih lanjut menghilangkan pengotor yang ada dalam oli bekas. Hasil daur ulang kemudian dicampur dengan solar standar dengan kandungan masing-masing 40%, 50%, dan 60% hasil daur ulang dan sisanya berupa solar standar. Hasil karakterisasi bahan bakar menunjukkan bahwa kandungan hasil daur ulang sebanyak 40% volume merupakan batasan yang direkomendasikan untuk digunakan pada mesin diesel tanpa perlu melakukan modifikasi mesin.Keywords: Bahan bakar hasil daur ulang, solar standar
PENINGKATAN PEMBELAJARAN BOLA KASTI MELALUI PENDEKATAN BERMAIN PADA SISWA KELAS V SD NEGERI 11 PADANGSAMBIAN TAHUN PELAJARAN 2015/2016 I Nyoman Suparta
Daiwi Widya Vol 4, No 2 (2017)
Publisher : Universitas Panji Sakti

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (269.473 KB) | DOI: 10.37637/dw.v4i2.11

Abstract

Penelitian ini bertujuan untuk mengetahui Peningkatan Pembelajaran Bola Kasti Melalui Pendekatan Bermain Pada Siswa Kelas V SD Negeri 11 Padangsambian Semester I Tahun Pelajaran 2015/2016. Subyek penelitian ini adalah siswa kelas V dengan jumlah siswa sebanyak 45 orang. Metode yang digunakan untuk mengumpulkan data tentang aktivitas dan hasil belajar adalah metode observasi dan tes, dengan alat pengumpulan data berupa lembar observasi aktivitas siswa dan lembar soal-soal tes. Data yang diperoleh dianalisis dengan metode analisis deskriptif kuantitatif. Hasil penelitian ini menunjukkan bahwa dengan penggunaan media permainan ular tangga dalam pembelajaran penjaskes efektif meningkatkan aktivitas dan hasil belajar penjaskes siswa pada materi penjumlahan di kelas V. Pada semester I di SD Negeri 11 Padangsambian, masing-masing pada refleksi awal nilai Rata-Rata 60 prsentase 48,89,angka ini berada pada kategori kurang aktif dan dengan persentase hasil belajar sebesar 64,11 % angka ini berada pada kategori Cukup. Pada siklus I aktivitas belajar siswa sebesar nilai Rata-Rata 85,60dengan kategori aktif, dan hasil belajar sebesar 68,11% pada kategori Cukup. Pada siklus II diperoleh rata-rata aktivitas belajar siswa sebesar 87% dapat digolongkan pada kategori aktif, dan persentase hasil belajar siswa sebesar 81 sehingga melebihi KKM 70 angka ini berada pada kategori baik. Dikatakan efektif karena meningkatkan aktivitas dan hasil belajar penjaskes siswa kelas V di SD Negeri 11 Padangsambian.
PENGARUH SEKTOR INDUSTRI MIKRO DAN KECILTERHADAP KINERJA PEMBANGUNAN DI PROVINSI BALI(Periode Tahun 2012 sampai dengan 2021) I Nyoman Suparta
Jurnal Ilmiah Satyagraha Vol. 7 No. 1 (2024): Jurnal Ilmiah Satyagraha
Publisher : Universitas Mahendradatta

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Abstract

 Sektor industri mikro dan kecil menjadi sektor penting yang mampu memberikandampak positif terhadap kondisi sosial ekonomi masyarakat di Provinsi Bali.Pengaruh sektor industri mikro dan kecil diharapkan dapat memainkan peran dalammensejahterakan masyarakat melalui kinerja pembangunan. Tujuan dari penulisankarya tulis ini adalah untuk menemukan; (1) Pengaruh sektor industri mikro dan kecilterhadap kinerja ekonomi di Provinsi Bali, (2) Pengaruh sektor industri mikro dankecil dan kinerja ekonomi terhadap struktur ekonomi di Provinsi Bali, (3) Pengaruhsector industri mikro dan kecil, kinerja ekonomi, dan struktrur ekonomi terhadapkesejahteraan masyarakat di Provinsi Bali, (4) Pengaruh sektor industri mikro dankecil terhadap struktur ekonomi melalui kinerja ekonomi di Provinsi Bali, (5)Pengaruh sektor industri mikro dan kecil terhadap kesejahteraan masyarakat melaluikinerja ekonomi dan struktur ekonomi di Provinsi Bali. Teknik pengumpulan datayang dilakukan dengan observasi, wawancara mendalam dan dokumentasi. Data yang dikumpulkan menggunakan data time series kemudian dianalisis menggunakan SEMPLS. penelitian ini adalah penelitian deskriptif kuantitatif yang menggunakan data sekunder Kabupaten/Kota di Provinsi Bali tahun 2012 sampai dengan 2021. Hasilpenelitian menunjukan bahwa: (1) Sektor industri mikro dan kecil berpengaruh positif dan signifikan terhadap kinerja ekonomi di Provinsi Bali, (2) Sektor industri mikro dan kecil berpengaruh positif dan signifikan terhadap struktur ekonomi di Provinsi Bali, (3) Kinerja ekonomi berpengaruh positif, namun tidak signifikan terhadap struktur ekonomi di Provinsi Bali, (4) Sektor industry mikro dan kecil, kinerjaekonomi dan struktur ekonomi berpengaruh positif dan signifikan terhadapkesejahteraan masyarakat di Provinsi Bali, (5) Kinerja ekonomi tidak mampu secarasignifikan memediasi pengaruh sektor industri mikro dan kecil terhadap strukturekonomi, (6) Kombinasi kinerja ekonomi dan struktur ekonomi mampu secarasignifikan memediasi pengaruh sektor industri mikro dan kecil terhadap  kesejahteraan masyarakat, (7) Struktur ekonomi tidak mampu memediasi pengaruhantara kinerja ekonomi terhadap kesejahteraan masyarakat. 
Pengaruh Arus Listrik Spot Welding KW14-1031 Terhadap Kekuatan Geser Pada Baja St42 I Wayan Suma Wibawa; I Made Anom Adiaksa; Made Ardikosa Satrya Wibawa; A.A. Gede Pradnyana Diputra; I Komang Kantun; I Nyoman Suparta
Journal of Applied Mechanical Engineering and Green Technology Vol. 4 No. 1 (2026): April
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/jametech.v4i1.14-19

Abstract

Welding technology serves not only as a manufacturing process but also as a repair solution for all metal-based components. Spot welding is a welding method that utilizes electrical resistance to join various products made of sheet metal, in which the contacting metal surfaces are fused by the heat generated from electrical resistance. This welding method is selected due to several advantages, including ease of operation without requiring specialized skills as demanded by other welding techniques, as well as a faster process that enhances production time efficiency. Control of the electrical current path during welding is critical, as it significantly influences the characteristics of the joint, including weld quality, shear strength, hardness level, and resistance to external loads. This study focuses on analyzing the effect of electrical current in spot welding techniques on the shear strength of ST 42 steel plates. Through descriptive analysis and graphical representation, this research aims to observe the relationship between electrical current and the resulting shear strength produced by the welding process. The lowest average shear strength was recorded at an input current of 20.36 A with a welding output current of 6011.47 A, a welding time of 8 seconds, and a heat input of 61894.30 J, yielding a shear strength of 1.67 MPa. Meanwhile, the highest average shear strength was obtained at an input current of 28.95 A with a welding output current of 6011.47 A, a welding time of 8 seconds, and a heat input of 88007.92 J, resulting in a shear strength of 6.72 MPa. Electrical current control is therefore essential, as ST 42 steel plates experienced damage at an input current of 32.45 A and an output current of 6323.58 A, with a welding time of 8 seconds and a heat input of 98647.84 J.
A Analisa Alat Tanam Padi Dengan Sistem Gerak Putaran: Analysis of Rice Planting Tools with Rotary Motion System Satrya Wibawa, Made Ardikosa; Anak Agung Gede Pradnyana Diputra; I Wayan Suma Wibawa; I Wayan Marlon Managi; I Nyoman Suparta; I Ketut Suherman
Journal of Applied Mechanical Engineering and Green Technology Vol. 4 No. 1 (2026): April
Publisher : Unit Publikasi Ilmiah, P3M, Politeknik Negeri Bali

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31940/jametech.v4i1.1-7

Abstract

This study aims to design and develop a circular motion rice planting tool with high efficiency and effectiveness, particularly for narrow rice fields commonly found in Bali. The developed tool features a stainless steel frame, a manual drive system using a rotating spindle, a chain and sprocket transmission system, and a planting mechanism consisting of a main shaft equipped with a mechanical seedling clamp. The tool is ergonomically designed to reduce farmers’ physical workload and simplify maintenance, as it does not require additional energy sources such as fuel or electricity. Performance testing was conducted directly in rice fields located in Subak Ulun Suwi, Gianyar Regency. The testing method compared the time required for rice planting using traditional manual methods and the developed tool. Observation parameters included working time, ease of operation, labor requirements, and consistency of seedling planting results. The results showed that the circular motion rice planting tool significantly improved time efficiency. The average planting time decreased from about 24 minutes per 100 m² using manual methods to approximately 13 minutes per 100 m² using the tool, indicating a time efficiency improvement of nearly 50%. Additionally, the tool reduced farmers’ physical strain because the planting process no longer required prolonged bending. However, some technical challenges were still identified, particularly related to inconsistent numbers of seedlings planted at certain field points. These issues were influenced by variations in mud field conditions, differences in seedling size, and the stability of the clamping mechanism during operation. Overall, the circular motion rice planting tool shows strong potential to improve productivity and planting efficiency, especially in narrow and terraced rice fields. Further development is needed to enhance planting mechanism stability and ensure consistent seedling placement, enabling the tool to become an affordable and practical agricultural mechanization solution suitable for Bali.
Co-Authors A.A. Gede Pradnyana Diputra Ainul Ghurri Anak Agung Gede Pradnyana Diputra I Ketut Suherman I Komang Kantun I Made Anom Adiaksa I Wayan Marlon Managi I Wayan Suma Wibawa Made Ardikosa satrya Wibawa Satrya Wibawa, Made Ardikosa SPG Gunawan Tista