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All Journal SAINSTEK International Journal of Innovation in Mechanical Engineering and Advanced Materials IRA Jurnal Pengabdian Kepada Masyarakat
Diah Utami, Diah
Universitas Lampung
Automotive Engineering Civil Engineering, Building, Construction & Architecture Education Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Other

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Pelatihan Penulisan Surat Dinas Untuk Siswa/i SMK 10 Nopember Jakarta Utami, Diah; Youlia, Rikko Putra; Junaedi, Didi
IRA Jurnal Pengabdian Kepada Masyarakat (IRAJPKM) Vol 2 No 1 (2024): April
Publisher : CV. IRA PUBLISHING

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56862/irajpkm.v2i1.107

Abstract

Official letter writing training for  students is an activity that aims to provide students with understanding and skills in writing official letters effectively and in accordance with applicable regulations. Official letters are a form of official communication in schools and other institutions, so it is important for students to understand how to write them well. Official letter writing training for students SMK aims to prepare them with the skills needed to communicate effectively in formal environments, both in the world of education and in the world of work. In this way, they are expected to be able to produce official letters that are clear, concise and in accordance with applicable standards.
Heat Mapping and Plastic Strain Radius Modeling of Dual-Tool Friction Stir Welds 6061 Aluminum Alloy Plate Using FEM Youlia, Rikko Putra; Utami, Diah; Romahadi, Dedik; Yishuang, Tang
International Journal of Innovation in Mechanical Engineering and Advanced Materials Vol 6, No 2 (2024)
Publisher : Universitas Mercu Buana, Prodi S2 Teknik Mesin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22441/ijimeam.v6i2.28235

Abstract

This study investigates the effects of Dual-Tool Friction Stir Welding (DT-FSW) parameters on the weld quality of 8 mm thick 6061 aluminum alloy plates, specifically focusing on the elimination or minimization of the "pass-overlap zone" that’s a gap typically observed at the mid-section of the weld cross-section resembling characteristics of the Heat-Affected Zone (HAZ). To address ongoing debates regarding the optimal joint performance concerning this overlap, symmetric increases in the dimensions of both FSW tools were implemented to analyze resultant temperature fields and plastic strain adaptations at the weld interfaces. Simulation visualizations were conducted with tool density variations at intervals of 0.2 mm and 0.4 mm. Results indicate that increasing tool density, thereby reducing the distance between tool surfaces, leads to a decrease in peak temperatures generated during welding. This reduction in temperature correlates with a more uniform distribution of plastic strain rates across all layers of the material—upper, middle, and lower—with the leading edge exhibiting the most significant improvement in strain uniformity. Conversely, during the stabilization phase, a decrease in tool density (S) results in a reduction of the maximum equivalent plastic strain rate. These findings suggest that careful adjustment of tool density in DT-FSW processes can enhance weld quality by promoting more uniform mechanical and thermal properties across the joint.
Evaluasi Kinerja Kelembagaan P3A Pada Daerah Irigasi Pamukkulu Dalam Menghadapi Modernisasi Utami, Diah; Kurniyaningrum, Endah; Anwar, Saihul
SAINSTEK Vol. 12 No. 1 (2024)
Publisher : Sekolah Tinggi Teknologi Pekanbaru

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35583/js.v12i1.212

Abstract

Daerah Irigasi Pamukkulu termasuk salah satu daerah irigasi yang dirancang menjadi daerah irigasi premium. Pada penelitian ini, kelembagaan yang diteliti yaitu P3A. Pada DI Pamukkulu kondisi P3A diantaranya belum mandirinya P3A dan masih sering terjadi konflik pembagian air. Sehingga dengan kondisi P3A tersebut maka perlu dilakukan optimalisasi P3A dalam menunjang persiapan modernisasi irigasi pada DI Pamukkulu. Metode penelitian yang digunakan yaitu dengan pengisian kuisioner, wawancara dan observasi lapangan. Subyek penelitian yaitu 53 ketua Perkumpulan Petani Pemakai Air (P3A) yang memanfaatkan air irigasi di Daerah Irigasi Pamukkulu. Untuk penilaian P3A pada penelitian ini berdasarkan empat aspek/indikator, meliputi aspek organisasi teknis irigasi, usaha tani, pembiayaan. Analisis data dilakukan berdasarkan statistik. Hasil penelitian terkait kesiapan kelembagaan P3A ini didapat bahwa sebesar 77,4% atau 41 unit P3A di Daerah Irigasi Pamukkulu berada dalam tahap sedang berkembang dengan status lanjut sehingga dapat dilakukan modernisasi irigasi dan perlu adanya beberapa perbaikan pada bagian tertentu untuk persiapan modernisasi.
Co-Authors Didi Junaedi Endah Kurniyaningrum Romahadi, Dedik Saihul Anwar Yishuang, Tang Youlia, Rikko Putra