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All Journal Journal of Mechanical Engineering Science and Technology Biomedical and Mechanical Engineering Journal
Mahmudah, Imam
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Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Transportation

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Data Retrieval on Heat Exchange Machines Geralfine, Hilza Arrun; Mahmudah, Imam; Perdana, Rizky Ridho; Naufal, Ananda; Hermaputra, Virendra Maulana; Bagindo, Fikran Azizi; Witjaksono, Yoga Aiman; Saputro , W
BIOMEJ Vol. 4 No. 2 (2024): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v4i2.134

Abstract

In many industrial processes, heat transfer—the movement of thermal energy from one object or medium to another—is a significant phenomena. Conduction, convection, and radiation are the three primary mechanisms via which this phenomena happens. When a temperature gradient causes heat to go from a hotter to a cooler region in a solid substance, this process is known as conduction. Heat is transferred through a moving fluid (liquid or gas) by convection, which can occur spontaneously as a result of density differences or be induced mechanically by a pump or fan. Unlike the other two methods, radiation includes the movement of energy in the form of electromagnetic waves and does not require a medium.
Development of Adjustable Static Test Equipment for Below-Knee Prosthetic Feet: A Case Study Nurrokhim, Firmansyah Hafizh Rizal; Mawandi, Fauzan Raka; Safitri, Puspa Dinda; Mahmudah, Imam; Mirnanda, Dwiky; Adnyono, Ndaru; Lestari, Wahyu Dwi
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 9, No 1 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v9i12025p143

Abstract

The high prevalence of physical disabilities in Indonesia, particularly among the productive-age population, highlights the urgent need for advancements in prosthetic technology. While local fabricators have begun producing prosthetic feet, the lack of standardized testing procedures compromises safety and performance. This study addresses that gap by developing an adjustable static testing device tailored for below-knee prosthetic feet, focusing on keel and heel tests to evaluate mechanical performance. The device includes a jig-fixture platform adjustable to 8° and 15° for heel and keel tests, respectively. It applies a 1230 N load based on AOPA standards and integrates load and displacement sensors for accurate data acquisition. Structural components are constructed from AISI 1020 steel, with fabrication involving welding, assembly, and system calibration. The testing procedure adheres to ISO 10328 to ensure reliability under realistic loading conditions. An Ottobock SACH prosthetic foot was used in trials, demonstrating the device’s ability to classify prosthetic feet into dynamic and cushioned types, based on load-bearing and energy-return characteristics. Polynomial regression analysis showed high accuracy in capturing load-displacement behavior, with R² values above 0.85 for both tests. The results offer valuable guidance for local prosthetic fabricators aiming to design testing equipment or apply AOPA and ISO standards for quality assurance. This research supports the development of a standardized testing framework for prosthetic feet in Indonesia, enhancing product safety and quality while promoting alignment with international benchmarks. The outcomes also suggest potential for broader applications in advancing prosthetic technologies and establishing national standards.
Co-Authors Adnyono, Ndaru Bagindo, Fikran Azizi Geralfine, Hilza Arrun Hermaputra, Virendra Maulana Mawandi, Fauzan Raka Mirnanda, Dwiky Naufal, Ananda Nurrokhim, Firmansyah Hafizh Rizal Perdana, Rizky Ridho Safitri, Puspa Dinda Saputro , W Wahyu Dwi Lestari Witjaksono, Yoga Aiman