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All Journal TEKNIK Majalah Ilmiah MOMENTUM Jurnal Rekayasa Mesin Journal of Mechanical Engineering Science and Technology Jurnal Basicedu Journal of Robotics and Control (JRC) Jurnal Abdi Insani Nusantara Science and Technology Proceedings Mechanical Engineering for Society and Industry Jurnal Pengbdian Teknik Mesin Biomedical and Mechanical Engineering Journal Journal of Mechanical Engineering, Science, and Innovation Archive: Jurnal Pengabdian Kepada Masyarakat Jurnal Basicedu JATIMAS : Jurnal Pertanian dan Pengabdian Masyarakat Maddana: Jurnal Pengabdian Kepada Masyarakat AT-TAKLIM: Jurnal Pendidikan Multidisiplin
Wahyu Dwi Lestari
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Tear Resistance Evaluation of Room Temperature Vulcanizing Silicone Rubber: A Comparative Study Mawandi, F.R.; Safitri, P.D.; Mirnanda, D.; Nurrokhim, F.H.R.; Adyono, 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/um016v9i12025p190

Abstract

Room Temperature Vulcanizing (RTV) silicone cures at room conditions, providing tear resistance and flexibility to a wide range of industries. Yet, its mechanical performance improvement continues to be difficult when it is filled and catalyzed. In this work, the tear resistance of three RTV materials—RTV 48, RTV 683, and RTV M4503—is investigated with different talc (2–4 wt.%) and catalyst (40–60 wt.%) formulations. Tear resistance testing per ASTM D624 yielded average and standard deviation values for material consistency determinations. Comparative analysis is also given in the research to ascertain the effect of over-cross-linking on elasticity and structural morphology. RTV 48 experienced a dramatic decrease in tear strength at high catalyst content due to over-cross-linking and the loss of elasticity. RTV 683 experienced initial improvement through the addition of talc, but excess catalyst caused premature cure and reinforcement loss. In contrast, RTV M4503 showed significant tear resistance enhancement as talc and catalyst were compounded optimally, maintaining structural integrity and reinforcement efficacy. Results demonstrate the crucial role of filler and curing agent concentration interaction in modulating silicone mechanical properties. RTV M4503 featured the optimal tear resistance and stable performance among the compositions assessed, indicating its potential use in applications requiring enhanced durability. This research provides a guide to optimization of additive ratios in RTV silicone formulations, guiding materials and process conditions selection for industrial applications that demand reproducible mechanical strength.
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.
PELATIHAN PENGOPERASIAN ALAT PENGHANCUR DAN PENGADUK KOTORAN HEWAN (KOHE) TERINTEGRASI DI CV TIGA LIMA JAYA DESA JAJAR GUMREGAH lestari, Wahyu Dwi; Edahwati, Luluk; Harya, Gyska Indah
Jurnal Abdi Insani Vol 11 No 4 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i4.1789

Abstract

Training on the use of an integrated animal manure crusher and mixer (KOHE) at CV Tiga Lima Jaya aims to improve the efficiency of animal manure management as an ingredient for making organic fertilizer and employee skills. This training includes basic theory of machine operation, practical demonstrations, maintenance, and troubleshooting. The method of implementing this community service activity includes preparation, implementation, and evaluation or follow-up. The results of the training showed an improvement in employee knowledge and skills, with an increase in theory evaluation scores from 55% to 90% and 88% and employees were able to operate the machine independently. Operational efficiency improved, KOHE processing time from 5 hours to 2 hours per day, and processing capacity increased by 50%. The training also contributed to the SDGs, specifically in clean and affordable energy (SDG 7), decent work and economic growth (SDG 8), and industry, innovation and infrastructure (SDG 9). Future recommendations include continuous training, environmental impact measurement, cooperation with educational institutions, implementation of new technologies, and infrastructure improvements.
EDUKASI PRINSIP ESG DALAM PRODUKSI PROSTETIK UNTUK MAHASISWA RAJAMANGALA UNIVERSITY OF TECHNOLOGY KRUNGTHEP lestari, Wahyu Dwi; Yudha, Dhian Satria
Jurnal Abdi Insani Vol 12 No 3 (2025): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v12i3.2385

Abstract

Manufaktur prostetik kaki merupakan bagian penting dari industri kesehatan yang memberikan solusi mobilitas bagi individu dengan kebutuhan khusus. Di Asia, keberagaman sosial dan ekonomi menciptakan tantangan dalam menciptakan produksi yang berkelanjutan, sehingga prinsip Environmental, Social, and Governance (ESG) menjadi relevan untuk diintegrasikan. Kegiatan pengabdian kepada masyarakat ini bertujuan untuk memberikan edukasi kepada mahasiswa di Rajamangala University of Technology Krungthep mengenai pentingnya ESG dalam manufaktur prostetik terutama di wilayah Asia. Kegiatan pengabdian kepada masyarakat yang dilakukan melibatkan beberapa tahapan, diantaranya yaitu mencakup persiapan materi, sesi pemaparan materi, diskusi, dan refleksi dan evaluasi. Hasil kegiatan menunjukkan adanya peningkatan kesadaran mahasiswa tentang pentingnya ESG, ide kreatif yang muncul selama diskusi, dan pemahaman mengenai tantangan yang ada. Kegiatan ini berkontribusi pada tingkat pemahaman mahasiswa terkait dengan pentingnya penerapan ESG di bidang produksi alat kesehatan khususnya prostetik kaki. Edukasi tentang ESG ini memberikan dampak positif terhadap pemahaman mahasiswa dan diharapkan menjadi langkah awal untuk mendukung keberlanjutan industri kesehatan di masa depan. Pengabdian ini juga berkontribusi terhadap pencapaian Tujuan Pembangunan Berkelanjutan (SDGs), khususnya dalam SDGs 3 (Kehidupan Sehat dan Sejahtera), SDGs 4 (Pendidikan Berkualitas), dan SDGs 9 (Industri, Inovasi dan Infrastruktur). Edukasi ESG meningkatkan pemahaman mahasiswa tentang keberlanjutan industri kesehatan, mendorong kolaborasi akademisi, industri, dan pemerintah dalam kebijakan berkelanjutan. Rekomendasi mencakup peningkatan pelatihan ESG di perguruan tinggi, adopsi teknologi ramah lingkungan, dan transparansi laporan ESG oleh perusahaan. Langkah-langkah ini diharapkan mempercepat transformasi industri prostetik menuju keberlanjutan, mendukung pencapaian tujuan pembangunan berkelanjutan secara global.
Improving Classification Accuracy of Breast Ultrasound Images Using Wasserstein GAN for Synthetic Data Augmentation Mas Diyasa, I Gede Susrama; Humairah, Sayyidah; Puspaningrum, Eva Yulia; Durry, Fara Disa; Lestari, Wahyu Dwi; Caesarendra, Wahyu; Dewi, Deshinta Arrova; Aryananda, Rangga Laksana
Journal of Robotics and Control (JRC) Vol. 6 No. 4 (2025)
Publisher : Universitas Muhammadiyah Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.18196/jrc.v6i4.25075

Abstract

Breast cancer remains one of the most prevalent cancers in Indonesia, and early detection plays a vital role in improving patient outcomes. Ultrasound imaging is a non-invasive and accessible technique used to classify breast conditions into normal, benign, or malignant categories. The advancement of deep learning, particularly Transfer Learning with Convolutional Neural Networks (CNNs), has significantly enhanced the performance of automated image classification. However, the effectiveness of CNNs heavily relies on large, balanced datasets—resources that are often limited and imbalanced in medical domains. To address this issue, this study explores the use of Wasserstein Generative Adversarial Networks (WGAN) for synthetic data augmentation. WGAN is capable of learning the underlying distribution of real ultrasound images and generating high-quality synthetic samples. The inclusion of the Wasserstein distance stabilizes training, with convergence observed around 2500–3000 epochs out of 5000. While synthetic data improves classifier performance, there remains a potential risk of overfitting, particularly when the synthetic images closely mirror the training data. Compared to traditional augmentation techniques such as rotation, flipping, and scaling, WGAN-generated data provides more diverse and realistic representations. Among the tested models, VGG16 achieved the highest accuracy of 83.33% after WGAN augmentation. Nonetheless, computational resource limitations posed challenges in training stability and duration. Furthermore, issues related to model generalizability, as well as ethical and patient privacy considerations in using synthetic medical data, must be addressed to ensure responsible deployment in real-world clinical settings.
Prosthetic Foot Mold Making with Photogrammetry Based Reverse Engineering Method Lestari, Wahyu Dwi; Arif Hidayat, Muhammad
Jurnal Rekayasa Mesin Vol. 20 No. 2 (2025): Volume 20, Nomor 2, Agustus 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i2.6276

Abstract

Prosthetic foot mold making is a crucial stage in the production of prosthetic feet that are in accordance with the anatomy and user needs. This research aims to develop a method for making prosthetic foot mold using a reverse engineering approach with photogrammetry techniques. The process begins with scanning the sole of the foot using photogrammetry methods to obtain a three dimensional model. The scanned model is then converted into a CAD design which is used as the basis for mold making. The mold design was made by considering ergonomic aspects and ease of manufacturing in the next stage. The results showed that the average deviation was within the range of ±0.65 mm or 0.42%, with a maximum deviation of 1.42%. This method is capable of producing precise casts that match the geometry of the original foot. With this approach, it is expected to improve the quality and customization of prosthetic products in the future.
Pengaruh Kecepatan Treadmill terhadap Parameter Kinematika Berjalan: Studi Kasus pada Kecepatan 2,0; 2,5; dan 3,0 km/jam Lestari, Wahyu Dwi; Fauzan Raka Mawandi
Jurnal Rekayasa Mesin Vol. 20 No. 1 (2025): Volume 20, Nomor 1, April 2025
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v20i1.6278

Abstract

Penelitian tentang biomekanika gerak berjalan manusia memiliki posisi yang sangat penting di berbagai bidang. salah satunya adalah rehabilitasi, atletik, dan pembuatan kaki prostetik. Fokus dari penelitian ini untuk menganalisis tentang pengaruh variasi kecepatan pada treadmill terhadap parameter kinematika berjalan manusia seperti frekuensi, durasi langkah serta kecepatan dan percepatan sudut. Variasi kecepatan treadmill yang digunakan adalah 2,0; 2,5; dan 3,0 km/jam. Penelitian ini menggunakan desain studi kasus eksploratif (Single-subject case study) untuk mengevaluasi kelayakan dari sistem motion capture dengan menggunakan software Blender dan kamera GoPro Hero 9. Selanjutnya data akan dianalisa menggunakan MATLAB untuk mengetahui frekuensi, durasi langkah, serta kecepatan dan percepatan sudut setiap segmen sendi pada tubuh bagian bawah. Hasil menunjukkan bahwa peningkatan kecepatan treadmill menyebabkan durasi siklus berjalan yang lebih pendek, peningkatan frekuensi langkah, serta peningkatan kecepatan dan percepatan sudut segmen tubuh. Temuan ini memberikan wawasan tentang mekanisme adaptasi pola gerakan berjalan manusia dan kaitannya dalam rehabilitasi serta pelatihan atletik. Studi lebih lanjut sebaiknya mencakup jumlah partisipan yang lebih banyak dan mempertimbangkan faktor tambahan berupa gaya reaksi tanah untuk analisis yang lebih menyeluruh.
PELATIHAN MANAJEMEN RANTAI PASOK PUPUK ORGANIK BAGI KELOMPOK TANI DEWI SRI DESA JAJAR GUMREGAH lestari, Wahyu Dwi; Maulana, Hendra; Nuryananda, Praja Firdaus; Lestari, Mufida Diah
Jurnal Abdi Insani Vol 11 No 3 (2024): Jurnal Abdi Insani
Publisher : Universitas Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29303/abdiinsani.v11i3.1782

Abstract

Good organic fertilizer supply chain management is essential to support the sustainability of agriculture in Indonesia, especially in rural areas. The Dewi Sri farmer group in Jajar Gumregah Village faces challenges in the distribution and stock management of organic fertilizer, which often impacts the productivity and quality of agricultural products. Improved knowledge and skills in supply chain management need to be trained, so that the distribution of organic fertilizer becomes more efficient, timely, and quality. The Organic Fertilizer Supply Chain Management Training for Dewi Sri Farmer Group in Jajar Gumregah Village aims to increase the capacity and efficiency of farmer groups in managing organic fertilizer production and distribution. Service activities involve several stages, starting from needs identification, program planning, training implementation, to evaluation and mentoring. Participants are given modules or practical guides as well as case studies to understand effective and efficient management of organic fertilizer distribution according to the needs of farmer groups. The results of the activities show that the implementation of effective supply chain management can increase the quality and quantity of organic fertilizer production, reduce operational costs, and improve the distribution system. Farmer group members gain new knowledge and skills in managing the supply chain more efficiently, which in turn supports increased agricultural productivity and economic welfare of the farming community. This service also contributes to the achievement of the Sustainable Development Goals (SDGs), particularly in ending hunger (SDG 2), promoting decent work and economic growth (SDG 8), and ensuring sustainable consumption and production patterns (SDG 12). This service underscores the importance of continuous training and technology application in agricultural supply chain management.
Pendampingan Budidaya Kopi Melalui Pelatihan Petik Merah dan Teknik Panen dalam Meningkatkan Kualitas Produksi di Desa Jengglungaharjo Kecamatan Tanggunggunung Kabupaten Tulungagung Lestari, Mufida Diah; Suryaningrum, Dwi Ari; Alfattama, Lona Chinsia; Lestari, Wahyu Dwi; Nuryananda, Praja Firdaus; Tjahjono, Jojok Dwirido
JATIMAS : Jurnal Pertanian dan Pengabdian Masyarakat Vol. 5 No. 2 (2025): NOVEMBER
Publisher : Kadiri University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30737/jatimas.v5i2.7018

Abstract

This mentoring program on coffee cultivation, implemented through training in red-cherry picking and selective harvesting techniques, was conducted to improve the quality of coffee yields in Jengglungharjo Village, Tanggunggunung District, Tulungagung Regency. The abundant coffee production in the area holds significant potential as a driver of the local economy. However, the quality of the coffee beans has remained low due to mixed-harvest practices and the farmers’ limited understanding of proper harvesting procedures. The program was carried out in three main stages: delivering material on the importance of harvesting fully ripe coffee cherries, providing training on effective harvesting techniques, and offering initial post-harvest assistance to ensure that red-cherry yields were processed correctly. The results showed a significant improvement in farmers’ knowledge and skills in identifying ripe cherries and applying selective harvesting practices. Farmers began to understand the relationship between proper harvesting methods and improvements in coffee bean quality, including the increased proportion of premium-grade beans in both natural and full-washed processes. This training is expected to serve as an initial foundation for promoting more sustainable, productive, and economically valuable coffee cultivation practices for the community of Jengglungharjo Village. Program pendampingan budidaya kopi melalui pelatihan petik merah dan teknik panen selektif ini dilaksanakan untuk meningkatkan mutu hasil panen kopi di Desa Jengglungharjo, Kecamatan Tanggunggunung, Kabupaten Tulungagung. Produksi kopi yang melimpah di wilayah tersebut memiliki potensi besar sebagai penggerak ekonomi lokal. Namun, mutu biji kopi yang dihasilkan masih rendah akibat kebiasaan panen campur serta minimnya pemahaman petani mengenai prosedur panen yang tepat. Kegiatan ini dilaksanakan melalui tiga tahapan utama, yaitu penyampaian materi terkait pentingnya memanen buah kopi yang benar-benar matang, pelatihan teknik panen yang efektif, serta pendampingan pascapanen awal untuk memastikan hasil petik merah diproses secara benar. Hasil kegiatan menunjukkan peningkatan signifikan pada pengetahuan dan keterampilan petani dalam mengidentifikasi buah matang dan menerapkan panen selektif. Petani mulai memahami hubungan antara metode panen yang tepat dengan peningkatan kualitas biji kopi, termasuk meningkatnya proporsi biji berkualitas premium pada proses natural maupun full washed. Pelatihan ini diharapkan menjadi landasan awal untuk mewujudkan praktik budidaya kopi yang lebih berkelanjutan, produktif, dan bernilai ekonomi tinggi bagi masyarakat Desa Jengglungharjo
Co-Authors Adnyono, Ndaru Ahmad Khairul Faizin Ahmad Khairun Faizin Alfattama, Lona Chinsia Arif Hidayat, Muhammad Aryananda, Rangga Laksana Atika Andini Bayuseno, A P Danaryanto, A T Dera, Nurmala Santi Dewi, Deshinta Arrova Dwi Ari Suryaningrum, Dwi Ari Eva Yulia Puspaningrum Faiza, Linda Ziyadatul Faizin, Ahmad Khairul Fara Disa Durry Fauzan Raka Mawandi Ferdi Kurniawan Firmansah, Achmad Robi Ghozali, Achmad Imam Harya, Gyska Indah Humairah, Sayyidah Ika Nawang Puspitawati Ikhsanudin, Zaky Ishak, Sahional Ismail, R Issafira, Radissa Dzaky Jamari, J Kilo, Faisal Krolczyk, Grzegorz Kurniawan, Ferdi L.Urip Widodo, Yohandrik Novel Karaman Lestari, Mufida Diah Luluk Edahwati Luluk Edahwati Luluk Edahwati Luluk edahwati Mahameru, Rolland D.K. Mahameru, Rolland Darin Khalifah Mahmudah, Imam Mas Diyasa, I Gede Susrama Maulana, Hendra Mawandi, F.R. Mawandi, Fauzan Raka Mirnanda, D. Mirnanda, Dwiky Mr. Sutiyono Muhammad Abdillah Mukti, Abdi Satryo Ndaru Adyono Ndaru Adyono Ndaru Adyono, Ndaru Nikmah, Ulin Novel Karaman Nugroho, A Nunung Lusiana Margawati Nurrokhim, F.H.R. Nurrokhim, Firmansyah Hafizh Rizal Nuryananda, Praja Firdaus Prayoga, Adimas Dwi Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Radissa Dzaky Issafira Rahardja, Dimas Revindra Rosyadi, Mochammad Wildan Rosyadi, Mochammad Willdan Rosyadi, Willdan Safitri, P.D. Safitri, Puspa Dinda Sanjaya, Kadek Heri Sari, Tria Puspa Seno Darmanto Sri Utami Handayani Suares, Reza Mardiansah Sutiyono Talango, Novriyanti Tjahjono, Jojok Dwirido Tria Puspa Sari Tyas Martika Anggriana Wahyu Caesarendra Widagda, Garda Dibya Widya Kusumaningsih Wiliandi Saputro Wiliandi Saputro Wiliandi Saputro Yanto, Agus Dwi Yudha, Dhian Satria