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All Journal Scientific Journal of Mechanical Engineering Kinematika AMMA : Jurnal Pengabdian Masyarakat Jurnal Polimesin Aksi Nyata : Jurnal Pengabdian Sosial dan Kemanusiaan International Journal of Mechanical, Electrical and Civil Engineering
Ahmad Mamba'udin
Politeknik Negeri Semarang
Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemistry Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Industrial & Manufacturing Engineering Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mechanical Engineering Nursing

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Penerapan Teknologi Operasional Penggunaan Mesin Penarik Kulit Kambing UKM ‘Mak Ngat’ Dipasar Rasamala Perumahan Srondol Wetan Kecamatan Bayumanik Kota Semarang Trio Setiyawan; Riles WM; Sugeng Irianto; Timotius Anggit; Nurhidayati Nurhidayati; Hery Tristijanto; Avicenna An-Nizami; Iman Mujiarto; Yuris Bahadur Wirawan; Elfrida Rizky Riadini; Ahmad Mamba'udin
Aksi Nyata : Jurnal Pengabdian Sosial dan Kemanusiaan Vol. 2 No. 2 (2025): Aksi Nyata : Jurnal Pengabdian Sosial dan Kemanusiaan
Publisher : Lembaga Pengembangan Kinerja Dosen

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62383/aksinyata.v2i2.1340

Abstract

The partners for this community service activity are UMKM which are engaged in goat slaughtering. One of the problems faced is that the process of removing goat skin is still manual, that is, it still uses human labor, where using human power for the goat skinning process requires less efficient time. Therefore, these UMKM really need a touch of technology related to the goat skin removal method to overcome the problems of UMKM engaged in the business of slaughtering goats and selling goat meat. Therefore, in community service activities, goat skin pulling machines will be handed over to partner entrepreneurs, namely MSMEs. Mak Ngat at the Rasmala market in the Srondol Wetan housing complex, Banyumanik sub-district, Semarang city. Impact After using a goat skin pulling machine for Mak'Ngat UMKM, the goat skinning process is more economical, namely when done manually it can skin 12 goats in one hour, but when done using a machine, 12 goats can be done in 15 minutes and this number has increased drastically
Pengenalan Sistem Mesin Pesawat Bagi Siswa SMK Nasional Berbah Mamba’udin, Ahmad; Rizky Riadini, Elfrida; Pambekti, Arif
AMMA : Jurnal Pengabdian Masyarakat Vol. 3 No. 12 : Januari (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

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

Abstract

This activity aims to provide students of SMK Nasional Berbah with basic insights and understanding of aircraft engines. The limited access to practical knowledge of aviation technology serves as the main rationale for implementing this program. Through this activity, students receive materials covering fundamental theories of aircraft engines, types of engines, the working principles of turbine and piston engines, as well as visual and interactive demonstration sessions. The methods used include interactive lectures, group discussions, and component introductions through video-based media. The results indicate an improvement in students' understanding of basic aircraft engine concepts and a growing interest in the field of aviation. This activity aims to spark vocational school students’ interest in aviation science.
Design and Construction of Scaffolding with a Lifting Capacity of 300 kg Using a Drive Electric Hoist AC 220 V Riles Melvy Wattimena; Ignatius Gunawan Widodo; Yuris Bahadur Wirawan; Ahmad Mamba'udin; Abdul Syukur Alfauzi; Bambang Tjahjono; Timotius Anggit Kristiawan; Trio Setiyawan
International Journal of Mechanical, Electrical and Civil Engineering Vol. 2 No. 4 (2025): October: International Journal of Mechanical, Electrical and Civil Engineering.
Publisher : Asosiasi Riset Ilmu Teknik Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61132/ijmecie.v2i4.357

Abstract

Maintenance and repair work in a building or structure is not only in low places, but also in high places which require assistive devices. The assistive device in question is scaffolding. The design of this scaffolding begins with a literature study followed by data collection in the Mechanical Engineering Department of the Semarang State Polytechnic to obtain data on the need for height assistive devices which are used as a reference for making electric scaffolding. The purpose of this study is to design an electric scaffolding with a capacity of 300 kg and to perform the performance of the electric scaffolding made. After the design of the electric scaffolding, the dimensions of the equipment were obtained, namely 1000 mm x 1500 mm x 2000 mm and specifications that can lift goods with a maximum height of 5 m, a minimum height of 0.35 m, a maximum load of 300 kg and an AC 220 V electric hoist drive. Based on the results of the performance test, in this case the test data was taken from the weight of the load that the machine can lift based on the travel time when the machine moves up and down. The load weight of 300 kg with electric scaffolding was covered in 27.44 seconds when going up and 21.02 seconds when moving down.
SIFAT MEKANIK DAN FISIK 3D-PRINTED DENTAL PHOTOPOLYMER RESINS DALAM KONDISI PEMROSESAN YANG BERBEDA Ahmad Mamba'udin; Muhammad Akhsin Muflikhun; Adam Zuyyinal Adib; Dianisa Khoirum Sandi; Elfrida Rizky Riadini; Yuris Bahadur Wirawan
Scientific Journal of Mechanical Engineering Kinematika Vol 10 No 2 (2025): SJME Kinematika Desember 2025
Publisher : Mechanical Engineering Department, Faculty of Engineering, Universitas Lambung Mangkurat

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20527/sjmekinematika.v10i2.796

Abstract

Photopolymer resins have widely applied in dentistry to fabricate temporary restorations. This work gives a complete characterization of a dental non-castable photopolymer resin prepared via Digital Light Processing (DLP) 3D printing. Specimens were printed at layer thicknesses of 0.05, 0.075, and 0.1 mm, followed by post-cured treatments under UV light for 10, 20, and 30 minutes. A series of material characterization tests were performed, including assessments of hardness, moisture absorption behavior, and density measurements. The results indicate that hardness and moisture content are significantly impacted by post-curing time, while extended curing times resulted in greater specimen’s hardness and decreased moisture content. An increase in layer thickness led to a gradual reduction in hardness. A maximum hardness value of 57.7 Shore D was observed in the 3D-printed specimen, along with a highest moisture content of 1.05% MC. As expected, the specimens exhibited consistent density (1.19 ± 0.02 g/cm³) throughout all layer thickness and curing time variations. This study highlights the critical need to understand how process parameters affect dental non-castable photopolymer resin properties prior to clinical implementation.
Optimizing curing parameters to enhanced the compressive strength and toughness properties of Resin-Coated Sand (RCS) in foundry applications Khoryanton, Ampala; Harmanto, Sri; Mamba’udin, Ahmad; Alfauzi, Abdul Syukur; Tristijanto, Hery; Abidin, Zaenal; Yanuar, Padang; Putri, Farika Tono; Nugroho, Wahyu Isti; Kristiawan, Timotius Anggit; Sugiono, Friska Ayu Fitriani; Mujiarto, Iman; Riadini, Elfrida Rizky; Wirawan, Yuris Bahadur
Jurnal Polimesin Vol 23, No 2 (2025): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v23i2.6124

Abstract

Conventional heating methods remain prevalent among small and medium-sized enterprises (SMEs) for aluminum mold thermal regulation during resin-coated sand (RCS) core production. Inconsistent thermal regulation significantly alters the characteristics of resin-coated sand cores. This study aims to investigate the effect of curing parameters on the compressive strength and toughness of the resin-coated sand. The RCS specimens were prepared using an aluminum mold that underwent controlled thermal treatment in an electrical furnace. The thermal treatment is performed by processing specimens across a curing temperature range of 200-300°C and varying curing time from 3 to 15 minutes. HDPE polymer was proposed as the RCS binder. Compressive and impact tests were carried out to determine the characteristics of resin-coated sand. The results showed a non-linear relationship between curing parameters and mechanical properties. Although moderate curing time and higher temperatures initially improve compressive strength and toughness, exceeding optimal thresholds leads to the degradation of these mechanical characteristics. The highest mechanical properties (compressive strength = 38.4 MPa, toughness = 0.43 MPa) are achieved through a curing temperature of 250°C and a curing time of 9 minutes. This study provides valuable insights into determining the optimal parameters for processing resin-coated sand cores or molds with superior compressive and toughness properties.
Co-Authors Abdul Syukur Alfauzi Adam Zuyyinal Adib Alfauzi, Abdul Syukur Arif Pambekti Avicenna An-Nizami Bambang Tjahjono Dianisa Khoirum Sandi Elfrida Rizky Riadini Elfrida Rizky Riadini Hery Tristijanto Ignatius Gunawan Widodo Khoryanton, Ampala Muhammad Akhsin Muflikhun Nurhidayati Nurhidayati Padang Yanuar Putri, Farika Tono Riles Melvy Wattimena Riles WM Rizky Riadini, Elfrida Sri Harmanto Sugeng Irianto Sugiono, Friska Ayu Fitriani Timotius Anggit Timotius Anggit Kristiawan Trio Setiyawan Wahyu Isti Nugroho Yuris Bahadur Wirawan Yuris Bahadur Wirawan Yuris Bahadur Wirawan, Yuris Bahadur Zaenal Abidin