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All Journal Jurnal Energi Dan Manufaktur Rekayasa Mesin Media Mesin: Majalah Teknik Mesin Jurnal Rekayasa Material, Manufaktur & Energi JURNAL TEKNIK INFORMATIKA DAN SISTEM INFORMASI Jurnal Hilirisasi IPTEKS (JHI) Buletin Ilmiah Nagari Membangun Human Care Journal Piston: Journal of Technical Engineering Jurnal Abdi: Media Pengabdian Kepada Masyarakat Jurnal Surya Teknika Andalasian International Journal of Applied Science, Engineering, and Technology Journal of Ocean, Mechanical and Aerospace -science and engineering- (JOMAse) METAL : Jurnal Sistem Mekanik dan Termal
Hendery Dahlan, Hendery
Department Of Mechanical Engineering, Faculty Of Engineering, Universitas Andalas Padang, 25163 Sumatera Barat, Indonesia
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IMPLEMENTASI TEKNOLOGI WASTAFEL TANPA SENTUH DI RUMAH SAKIT KOTA PADANG DALAM RANGKA MEMUTUS MATA RANTAI COVID-19 Zaini Zaini; Syarkawi Syamsuddin; Wisnu Joko Wulung; Purnawan Purnawan; Hendery Dahlan; Wisnel Wisnel; Denny Herald
Jurnal Hilirisasi IPTEKS Vol. 3 No. 4 (2020)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v3i4.466

Abstract

The public's lack of concern for health protocols is directly proportional to the increase in the number of people affected by the Covid-19 virus. This condition worsens when public facilities such as available hand washing equipment tend to be less hygienic because there is still physical contact during the hand washing process, so there is a great potential risk of spreading the Covid-19 outbreak in the community en masse. Therefore an innovation was made in the form of a touchless hand washing device equipped with sensors to replace the function of water taps and manual liquid soap containers. The target audience of this activity is the people in the hospital environment of Padang City. This activity is carried out in two stages, namely the first stage to design tools and the second stage in the form of procurement of tools as well as outreach to the people of Padang City who visit the hospital regarding the introduction and how to use hand washing tools without touch as well as demonstrating to the community with the assistance of the hospital about how to wash hands properly and correctly according to health protocols.
TRANSFORMASI GENERASI MUDA SAWAH LADANG MELALUI INOVASI TEKNOLOGI AIR BERSIH DAN PEMBIBITAN IKAN DI NAGARI MAGEK, SUMATERA BARAT Dendi Adi Saputro; Sabri Haris; Ridwan Ridwan; Eka Satria; Adly Havendry; Adjar Pratoto; Hendery Dahlan; Trisfa Augia
Jurnal ABDI: Media Pengabdian Kepada Masyarakat Vol. 11 No. 2 (2026): JURNAL ABDI : Media Pengabdian Kepada masyarakat
Publisher : Universitas Negeri Surabaya

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

Abstract

Nagari Magek, located in Kamang Magek District, Agam Regency, West Sumatra, faces serious problems related to clean water quality due to the high iron, manganese, and sulfur content. Although a solar-powered borehole system has been built to meet the water needs of 300 households, the water produced is still unfit for consumption. It impacts the decline of fish breeding businesses, one of the essential local traditions in Nagari Magek. To overcome this problem, community service activities aim to design effective clean water treatment technology and assist in fish nurseries and farming. The design process of the multi-level water filter has been carried out as a solution to improve water quality by introducing aeration-sedimentation-filtration technology and the Recirculating Aquaculture System (RAS) system. In addition, the fish nursery business in Nagari Magek is supported by modern pond management training and the empowerment of the younger generation for sustainable management.
IMPLEMENTASI PENGGUNAAN APLIKASI ANDROID SEBAGAI SELF-ASSESSMENT DAN MEDIA INFORMASI COVID-19 DI PUSKESMAS DADOK DAN KELURAHAN KAMPUNG LAPAI NANGGALO KOTA PADANG Augia, Trisfa; Ramadani, Mery; Dahlan, Hendery; Tani, Rizki Ridhatul; Fauziah, Fauziah
Jurnal Hilirisasi IPTEKS Vol. 3 No. 4 (2020)
Publisher : LPPM Universitas Andalas

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25077/jhi.v3i4.476

Abstract

Coronavirus Disease 2019 (COVID-19) is an infectious disease caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2). SARS-CoV-2 is a new type of coronavirus that has never been previously identified in humans. Indonesia reported its first case of COVID-19 on March 2, 2020 and the number continues to grow until now. Until October, 15 2020 the Ministry of Health reported 349,160 confirmed cases of COVID-19 with 12,268 deaths. The COVID-19 Self-Assessment application can help screening of individual and health workers to accelerate case finding and make it easier for health workers to provide curative efforts. Socialization of the COVID-19 Self-Assessment Application in coordination with the Public Health Center Dadok Tunggul Hitam and Kelurahan Kampung Lapai. Activities included introduction, installation, implementation, and monitoring and evaluation of application usage. Participants installed the application on an Android device and implemented the application enthusiastically. It is hoped that this application can make it easier for community to access information related to COVID-19 and carry out screening independently.
Design Modification and Strength Analysis of a Bearing Housing Using Finite Element Method Mulyadi Mulyadi; Bobby Umroh; Hendery Dahlan
Rekayasa Material, Manufaktur dan Energi Vol 9, No 2: JULI 2026
Publisher : Fakultas Teknik UMSU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30596/rmme.v9i2.31605

Abstract

Bearing housings are critical mechanical components in small-scale manufacturing machinery. In field operations, standard pillow block designs frequently experience premature structural failures such as material cracking and high deformation under dynamic loads. This study aims to determine the exact structural causes of failure in standard bearing housings used within chain transmission systems and to develop an optimized, structurally superior modified design. The investigation was conducted numerically using open-source tools: FreeCAD for three-dimensional parametric modeling and PrePoMax (CalculiX solver) for Finite Element Analysis (FEA). The component was modeled using ASTM Class 35 Cast Iron with a yield strength of 170 MPa. The loading condition simulated a 1 HP motor running at 1500 rpm with a generated torque of 1.59 kg·m, where the chain tensile force was applied directly to the housing bore. The initial simulation revealed that the baseline design suffered from high stress concentrations around the bolt hole and fillet regions due to insufficient material thickness. The maximum principal stress reached 107.4 MPa, yielding an inadequate safety factor of 1.6 and a displacement of 0.002 mm. To resolve this, structural modifications were implemented by adding reinforcing ribs and thickening the housing profile. The FEA results of the modified design showed a significant stress reduction to 55 MPa (a decrease of approximately 49%). Furthermore, the maximum displacement at the top section dropped to 0.0009 mm, demonstrating a 45% reduction in displacement and higher structural stiffness. Consequently, the safety factor increased substantially from 1.6 to 3.6 (simulated at 3.09 in direct stress ratio). The incorporation of strengthening ribs and wall thickening successfully redistributes operational loads and minimizes material distortion. The modified design satisfies industrial safety regulations and is highly feasible for implementation in small-scale industrial chain drive applications.Keywords: Bearing Housing, Finite Element Method, Stress Concentration, Reinforcing Ribs, Safety Factor.
Analisis Laju Korosi Baja Galvanis pada Media Air Sungai Kampar, Rokan, dan Siak Menggunakan Metode Weight Loss Ikhsan, Mukhlis; Pratama, Arya; Simanungkalit, Yahya Rahmadani; Pradana, Muhammad Ryan; Farhan, Muhammad; Castro, Victor Rio; Nasution, Ahmad Kafrawi; Dahlan, Hendery
SURYA TEKNIKA Vol 13 No 1 (2026): JURNAL SURYA TEKNIKA
Publisher : Fakultas Teknik UMRI

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37859/jst.v13i1.11236

Abstract

Riau Province has three main rivers: the Kampar, Rokan, and Siak Rivers, which play important roles in water transportation and infrastructure development. River water environments can accelerate the corrosion of metallic materials, including galvanized steel. This study aims to analyze and compare the corrosion rates of galvanized steel in the water media of the three rivers using the weight loss method based on the ASTM G31 standard. The experiments were conducted with immersion time variations of 168, 336, 504, and 672 hours. The observed parameters included mass loss, pH changes, and specimen surface morphology. The results showed that the highest corrosion rate occurred in Kampar River water, reaching 55.888 mpy after 672 hours of immersion, while the lowest corrosion rate was found in Rokan River water at 1.0052 mpy after 168 hours. The chemical characteristics of river water significantly affect the corrosion resistance of galvanized steel.
Co-Authors Abral, Hairul Adelia Fauziah Adjar Pratoto, Adjar Adly Havendry Afrinaldi, Feri Ahmad Kafrawi Nasution, Ahmad Kafrawi Bobby Umroh Castro, Victor Rio Dendi Adi Saputra M, Dendi Adi Dendi Adi Saputro Denny Herald Denny Herald Dwinda Yoanda Eka Satria Eka Satria Eka Satria, Eka Fadhillah, M. Ahlan Fauziah Fauziah Fauziah Fauziah Felina Azzahra Firman Ridwan Gita Felisha Astra Gusnanda, Raihan HG, Sabri Haris Ikhsan, Mukhlis Islahuddin Islahuddin Joice Natalie, Ezra Khairul, Fajri Lovely Son, Lovely Lusi Susanti, Lusi Mahardika, Melbi Meifal Rusli Meifal Rusli, Meifal Muchlisinalahuddin Muhammad Farhan Mulyadi Bur Mulyadi Bur, Mulyadi Mulyadi Mulyadi Nabil, M. Naufalunn Pradana, Muhammad Ryan Pratama, Arya Purnawan Purnawan Purnawan Purnawan R Mutya Rahmi Safitri Ramadani, Mery Ratna Wardani Ridwan Ridwan Rizki Ridhatul Tani Rozi Saferi Sabri Haris Sahputra, Roni Eka Saputra, M. Fazri Irwan Simanungkalit, Yahya Rahmadani Sosmiarti Sosmiarti Syarkawi Syamsuddin Syarkawi Syamsuddin Tani, Rizki Ridhatul Trisfa Augia Weriono Wisnel Wisnel Wisnel Wisnel Wisnu Joko Wulung Wisnu Joko Wulung Yudi Dwianda Zaini Zaini Zaini Zaini