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All Journal Jurnal Rekayasa Material, Manufaktur & Energi Communications in Science and Technology Journal of Saintech Transfer Jurnal Pengabdian Masyarakat Tjut Nyak Dhien
Armansyah GINTING
Department of Mechanical Engineering, Faculty of Engineering , University of Sumatera Utara, INDONESIA
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Control & Systems Engineering Education Electrical & Electronics Engineering Energy Engineering Law, Crime, Criminology & Criminal Justice Public Health Social Sciences Other

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Predictive mapping of surface roughness in turning of hardened AISI 4340 using carbide tools Ginting, Armansyah; Masyithah, Zuhrina
Communications in Science and Technology Vol 9 No 1 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.1.2024.1417

Abstract

This study presents a novel approach to predict surface roughness in the hard turning of AISI 4340 steel using carbide tools, aimed to develop a comprehensive predictive map. The hypothesis that surface roughness can be accurately predicted using a linear regression model was tested and confirmed. Experimental results showed surface roughness in the range of 1.946 to 5.636 microns. Statistical analysis revealed a normal distribution of surface roughness data with linear regression as the best-fit model, significantly determined by feed rate and explaining 98.41% of the variance. Machine learning validated this model, achieving high prediction accuracy (R² = 96.91%, MSE = 0.058, RMSE = 0.242). The innovative predictive map, created using a full factorial design, demonstrated a strong agreement between predicted and validated values. This work highlights the potential of integrating statistical and machine learning techniques for precise surface roughness prediction, recommending industrial validation to enhance machining productivity.
EnglishEducation on Making Liquid Fertilizer from Horse Urine at Berastagi Kuda Club Ginting, Nurzainah; Mirwandhono, R. Edhy; Ginting, Armansyah; Masythah, Zuhrina; Rahim, Norizan Baba
ABDIMASKU : Jurnal Pengabdian Masyarakat UTND Vol 4 No 2 (2025): Edisi Juli 2025 - Desember 2025
Publisher : Lembaga Penelitian dan Pengabdian Masyarakat Universitas Tjut Nyak Dhien

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36490/jpmtnd.v4i2.1871

Abstract

Horse urin that is not collected at the Berastagi Fruit Market and Gundaling tourist sites is a complaint for tourists. The urin splattered on the asphalt causes a strong odor. In this service, education was conducted to horse owners to collect horse urin and process it into liquid organic fertilizer (POC). Urin is collected from horses at tourist sites and in stables to maximize the volume of urin so that more POC is produced. The urin is then fermented by adding local starter. POC from fermented horse urin contains good nutrition so that it is suitable as a plant fertilizer. This International Community Service Program (PKM Kolaborasi Internasional) is a service collaboration between the Universitas Sumatera Utara and Universiti Sains Malaysia aims to provide education and training to the community on the use of horse urin to become liquid fertilizer. The activities were carried out through a participatory approach, including counseling, presentation of making urin fermentation, as well as pre-test and post-test evaluations to measure the increase in participant knowledge. The results of the activity showed that there was an increase in participant knowledge after participating in the activity, as well as high enthusiasm from the community for liquid fertilizer. There is an economic opportunity to sell liquid fertilizer to tourists who come because this fertilizer is environmentally friendly.
Tinjauan Penggerudian Laser: Kemajuan, Teknik Optimasi, dan Aplikasi Nasution, Abdul Haris; Ginting, Armansyah
Rekayasa Material, Manufaktur dan Energi Vol 8, No 2: JULI 2025
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v8i2.25616

Abstract

This review paper presents a comprehensive analysis of laser drilling technologies, focusing on recent advancements, optimization techniques, and industrial applications. Laser drilling has emerged as a crucial non-conventional machining process for creating precise micro-holes in various materials, including composites, metals, ceramics, and silicon. The paper examines multiple aspects of laser drilling processes, including different laser types (CO2, Nd:YAG, fiber, femtosecond), optimization methodologies, and parameter influences on output quality characteristics. Special attention is given to challenges in drilling complex materials like Glass Fiber Reinforced Polymer (GFRP) composites, titanium alloys, stainless steel, and ceramic matrix composites. The review highlights optimization approaches such as Response Surface Methodology (RSM), Multi-Objective Genetic Algorithm (MOGA), and various metaheuristic algorithms including grey wolf optimizer. The paper also explores emerging techniques like water-assisted laser drilling, vector laser drilling, and laser-layered scanning that address limitations in conventional processes. Environmental and sustainability aspects are discussed, with emphasis on energy efficiency and reduced material waste. This review aims to provide researchers and industry practitioners with a comprehensive understanding of current laser drilling technologies, while identifying future research directions toward more efficient, sustainable, and high-quality laser drilling processes
The Development of a prebiotic probiotic ice cream in Usaha Bersama Tani Ternak joint business group, Tadukan Raga Village, STM Hilir Regency, Deli Serdang County ginting, nurzainah; Ginting, Armansyah; R. Edhy , Mirwandhono; Masythah, Zuhrina
Journal of Saintech Transfer Vol. 8 No. 2 (2025): Publication in Press
Publisher : Talenta Publisher Universitas Sumatera Utara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32734/jst.v8i2.18209

Abstract

The focus of the service was teaching at the Usaha Bersama Tani Ternak Joint Business Group, Tadukan Raga Village, STM Hilir District, Deli Serdang Regency. In this group, many dairy goat farmers produce milk. Product innovation from goat milk is needed because, if we rely solely on the basic product — milk — there are limitations for consumers who buy it. In 2023, in the Joint Business group, training was conducted to make ice cream from goat's milk. The innovation of processing milk into ice cream will expand the product's marketing range and increase its shelf life. In 2024, assistance was provided to this group to develop ice cream with prebiotic and probiotic innovations. This is a regular one-year service, carried out in July 2024, and assistance will continue until December 2024. It is hoped that after the service, processing goat's milk into ice cream will be carried out intensively. Given that the air in North Sumatra is getting hotter, ice cream products will be in high demand. In addition, this community service activity also improves the Main Performance Indicators (IKU) of Higher Education, namely IKU 2, 3, and 5.  Mandatory outputs of this community service activity program include: 1) Scientific publications in abdimas journals/service journals with ISSN / National Journal Proceedings, 2) videos, and 3) disseminated through electronic/print media. Additional outputs include the production of probiotic prebiootic ice cream and participation in a national seminar, as well as the development of probiotic prebiotic ice cream products in Deli Serdang Regency.
Co-Authors Abd Haris Nasution Masythah, Zuhrina Mirwandhono, R. Edhy Nurzainah Ginting R. Edhy , Mirwandhono Rahim, Norizan Baba Zuhrina Masyithah