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Finite Element Analysis of Patient Specific Bone Plate with Ti6Al4V Material Selection Talitha Asmaria; Dita Ayu Mayasari; Safarudin Ramdhani; Muhammad Satrio Utomo; Daniel Panghihutan Malau; Dhyah Annur; Muhammad Ikhlasul Amal; Ika Kartika
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 11 No. 1 (2021)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v11n1.p83-93

A patient-specific implant is a designed implant that considers the needs of a specialized patients condition. In several surgical cases, the implant design needs to be adjusted based on the patient bones surface to suit the bone morphometry. This study aims to conduct the finite element analysis to investigate the stress distribution alongside the plate to consider clinical implementation. A bone plate has been designed following an adult pelvic bone shape for the pelvic fractures clinical case management. An FEA was accomplished to analyse the implant designs performance and estimate the installations clinical failures before the manufacturing process. The FEA calculation achieved the highest number of von misses stresses (VM) on the pelvic bone plate by 3.616 MPa. The obtained VM number on the simulation is smaller than the yield strength of Ti6Al4V. It concludes that the customized iliac plates design using Ti6Al4V can have excellent mechanical strength and can withstand the loading. Additional similar simulation using another software strengthen the results.

The organic waste management supply chain performance evaluation strategy uses an Interpretive Structural Modeling approach Arsiwi, Pramudi; Setyaningrum, Ratih; Talitha, Tita; Ramdhani, Safarudin
OPSI Vol 17, No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.12242

National Waste Management Information System shows that the amount of waste handled in Semarang City over the last three years has decreased with an average decline index of 1.06% per year. This is reinforced by the results of interviews with the Semarang City Environmental Service, that the handling of organic waste is still very limited because so far the handling has been more focused on an-organic waste. Therefore, it is necessary to evaluate supply chain performance to determine the constraints in organic waste management from upstream to downstream. Based on the research results using the Interpretive Structural Modeling (ISM) method through a focus group discussion process involving eight experts in the field of waste management, it is known that the supply chain performance for handling organic waste in Semarang City has 11 elements of constraints, which are divided into seven priority levels. The element with the highest priority is related to the availability of organic waste supplies, while the element with the lowest priority is technological innovation and the application of appropriate technology. Improving the performance of organic waste management supply chains should focus on elements according to priority.

Analisis Produktivitas Menggunakan Objective Matrix (OMAX) pada lantai produksi Sigaret Kretek Mesin (SKM) PT. Nikorama Citra Tobacco Fiqih, Muhamad Nur; Ramdhani, Safarudin
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 4 (2024): October
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i4.36685

This study is centered on calculating the productivity of the SKM (rolled kretek cigarette) production floor work station of PT. Nikorama Citra Tobacco from 22 January 2024 to 29 February 2024 which aims to measure the level of productivity in the cigarette production process on the SKM production floor, identify key elements that have the greatest impact on the level of productivity achieved, and propose or recommend improvement steps to increase productivity in the production process on the SKM production floor. This research utilizes the objective matrix method (OMAX) by measuring two elements of productivity, namely the element of efficiency and the element of effectiveness. From these two elements of productivity, six measurement ratios are obtained, labor ratio, production output ratio, working hours ratio, defective product ratio, production time ratio. , engine ratio. The results of this research show that the productivity results of the SKM production floor fluctuate up and down due to the instability of the productivity ratio performance value where the highest productivity occurs on February 22 2024 and the worst productivity on January 22 2024, while the best ratio value occurs in the yield ratio. production and worst ratio values ??on machine ratios. The worst ratio value occurs in the machine ratio so improvements need to be made so that the productivity value can be more optimal.

Evaluasi Postur Kerja Pemotongan Tahu Menggunakan Metode RULA di UMKM Handayani Devina Chalifatunnisa; Safarudin Ramdhani
Jurnal Teknik Vol 23 No 1 (2025): Jurnal Teknik
Publisher : Universitas Negeri Gorontalo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37031/jt.v23i1.623

MSMEs are one of the main pillars of Indonesia's economic growth, especially in the food sector. However, many production processes are still carried out manually and are not ergonomic. One such example is Mrs. Hj. Handayani's tofu MSME, where the manual tofu cutting process causes a non-ideal working posture and risks causing Musculoskeletal Disorders (MSDs). This study aims to initiate posture work using the Nordic Body Map (NBM) and Rapid Upper Limb Assessment (RULA) methods, as well as designing an ergonomic cutting tool based on a pneumatic system adapted to local anthropometric data. The evaluation was conducted on one worker through direct observation and body angle analysis using Angulus and CATIA V5 software. The initial analysis results showed an NBM score of 57 and a RULA score of 6, indicating the need for work posture improvements in the near future. After the implementation of the tool, the RULA score decreased to 2 and cutting time was reduced by 45%, proving the tool's effectiveness in improving ergonomics and work productivity in the MSME environment.

DESAIN ERGONOMIS ALAT PEMOTONG TAHU BERBASIS PNEUMATIK MENGGUNAKAN REVERSE ENGINEERING UNTUK MENGURANGI KELELAHAN KERJA PADA INDUSTRI SKALA KECIL Gustian Putra, Agsre Aditiya; safarudin ramdhani
JISI: Jurnal Integrasi Sistem Industri Vol. 12 No. 2 (2025): JISI UMJ
Publisher : Fakultas teknik Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24853/jisi.12.2.259-272

Tahu merupakan makanan yang banyak digemari oleh masyarakat Indonesia karena kandungan gizinya yang tinggi dan proses pembuatannya yang relatif mudah. Proses pemotongan tahu secara manual pada UMKM Bu Hj. Handayani di Ungaran masih dilakukan menggunakan pisau dapur dan tongkat kayu sebagai alat ukur, sehingga kurang efisien dan menyebabkan kelelahan fisik pada pekerja akibat postur kerja yang tidak ergonomis. Penelitian ini bertujuan untuk merancang ulang alat pemotong tahu berbasis pneumatik yang tidak terpakai melalui pendekatan Reverse Engineering, guna meningkatkan efisiensi kerja dan kenyamanan operator. Data antropometri dikumpulkan dari sepuluh pekerja untuk memastikan kesesuaian desain alat dengan karakteristik tubuh pengguna. Hasil perancangan menunjukkan peningkatan presisi pemotongan, pengurangan waktu kerja, serta penurunan potensi kelelahan fisik. Desain yang diusulkan mempertimbangkan aspek ergonomi, material food-grade, dan kestabilan mekanis, sehingga dapat diterapkan untuk meningkatkan produktivitas serta kesejahteraan kerja di industri rumah tangga tahu.

The organic waste management supply chain performance evaluation strategy uses an Interpretive Structural Modeling approach Arsiwi, Pramudi; Setyaningrum, Ratih; Talitha, Tita; Ramdhani, Safarudin
OPSI Vol 17 No 1 (2024): ISSN 1693-2102
Publisher : Jurusan Teknik Industri, Fakultas Teknologi Industri UPN "Veteran" Yogyakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31315/opsi.v17i1.12242

National Waste Management Information System shows that the amount of waste handled in Semarang City over the last three years has decreased with an average decline index of 1.06% per year. This is reinforced by the results of interviews with the Semarang City Environmental Service, that the handling of organic waste is still very limited because so far the handling has been more focused on an-organic waste. Therefore, it is necessary to evaluate supply chain performance to determine the constraints in organic waste management from upstream to downstream. Based on the research results using the Interpretive Structural Modeling (ISM) method through a focus group discussion process involving eight experts in the field of waste management, it is known that the supply chain performance for handling organic waste in Semarang City has 11 elements of constraints, which are divided into seven priority levels. The element with the highest priority is related to the availability of organic waste supplies, while the element with the lowest priority is technological innovation and the application of appropriate technology. Improving the performance of organic waste management supply chains should focus on elements according to priority.

Simulasi 3D Desain Cetakan Kanstin Menggunakan Finite Element Analysis Ramdhani, Safarudin; Abror, Muhammad Fatihul; Talitha, Tita
Jurnal Teknik Industri Terintegrasi (JUTIN) Vol. 7 No. 3 (2024): July
Publisher : LPPM Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/jutin.v7i3.32257

Current developments in infrastructure development have led to tight competition in the precast concrete industry. The use of precast concrete materials supports the need for infrastructure development, especially roads and city parks, especially kanstin products. The ability of precast concrete molds depends on several factors such as design, material and manufacturing process. The aim of this research is to find out the most optimal kanstin mold design in terms of structure and service life. The Finite Element Analysis (FEA) method is used to model and analyze the performance of kanstin mold designs. Based on 3D simulations of eight geometries with WF and UNP steel frames with ASTM A36 and AISI 1081 material types, it is still within safe limits for yield strength values. The largest von mises value is for WF AISI B and the smallest for UNP AISI A. It can be concluded that the highest life cycle is for the ASTM A36 material type UNP frame thickness A with a value of 7.91 years, while the von misess stress value is 113.4 Mpa which is still below the yield strength of ASTM A36 .

Simulation of CNC Milling on Chain Adjuster Design Using Fusion 360 to Enhance Process Time Efficiency Ikhwan Praditya Mirwany; Safarudin Ramdhani
Jurnal Media Teknik dan Sistem Industri Vol. 10 No. 1 (2026)
Publisher : Universitas Suryakancana

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35194/jmtsi.v10i1.5642

The digitalization of physical fluid phenomena in pump performance teaching media remains a significant challenge in the development of online and laboratory-based learning tools. This study aims to develop a Human Machine Interface (HMI) based device as a teaching aid to support pump performance practicum for students. The system is designed to provide informative, real time, and responsive visualizations associated with valve opening adjustments and motor shaft rotation. The development process follows the waterfall model, which includes requirement analysis, system design, implementation, and verification. The resulting HMI interface dashboard demonstrates interactive capabilities, enabling users to monitor and control system parameters effectively. The system responds dynamically to operational changes and displays variations in key parameters such as pressure and fluid flow rate in real time. The implementation of this HMI based learning media is expected to enhance students’ understanding of fundamental pump performance concepts by providing a more engaging and intuitive learning experience. Through dynamic visualization and interactive control features, the system bridges the gap between theoretical knowledge and practical application during laboratory sessions.

PENDAMPINGAN INOVASI PRODUK PELET MAGGOT UNTUK MENINGKATKAN DAYA SAING UMKM REPRO Safarudin Ramdhani; Ratih Setyaningrum; Pramudi Arsiwi; Tita Talitha
Community Development Journal : Jurnal Pengabdian Masyarakat Vol. 5 No. 6 (2024): Vol. 5 No. 6 Tahun 2024
Publisher : Universitas Pahlawan Tuanku Tambusai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31004/cdj.v5i6.36134

UMKM REPRO merupakan salah satu UMKM di Kota Semarang, yang bergerak di bidang olahan limbah organik dan budidaya maggot. Saat ini produk yang dihasilkan oleh UMKM REPRO hanya berupa maggot fresh dan maggot kering yang biasa diperjualbelikan dengan para peternak untuk pakan ikan maupun unggas. Maggot fresh memiliki kandungan nutrisi yang cukup baik bagi ternak, namun memiliki keterbatasan yaitu life cycle product yang sangat pendek yaitu hanya berkisar 3 – 5 hari sebelum akhirnya berkembang biak menjadi pupa. Hal ini berdampak pada keterbatasan jangkauan area pemasaran UMKM REPRO, yaitu hanya di area Semarang Raya. Melalui Program Kemitraan Masyarakat ini, tim telah berhasil melakukan Pendampingan pada UMKM REPRO dan menghasilkan diversifikasi produk turunan maggot berupa pelet magot. Produk pelet magot tersebut memiliki siklus hidup produk lebih panjang dibanding magot fresh serta memiliki kualitas yang lebih baik. Hal ini akan berdampak pada meningkatnya daya saing UMKM REPRO dikarenakan produk tersebut berpotensi mendukung tercapainya jangkauan area pemasaran yang lebih luas dan peningkatan omset penjualan UMKM REPRO kedepannya.

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