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All Journal REKAYASA Jurnal Konversi Energi dan Manufaktur Sains Data Jurnal Studi Matematika dan Teknologi
Wahyudi, Mujib
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Aerospace Engineering Agriculture, Biological Sciences & Forestry Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Physics

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Rekayasa Digitalisasi Pertanian Hidroponik NFT dengan Model Kendali Suhu, pH dan Electrical Conductivity (EC) Wahyuni, Sri; Wahyudi, Mujib; Rusidy, Amin
Rekayasa Vol 14, No 1: April 2021
Publisher : Universitas Trunojoyo Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21107/rekayasa.v14i1.9217

Abstract

Madura, which is nicknamed the island of salt, began to develop hydroponics, especially for the fulfillment of vegetables. So far, hydroponic practitioners have always checked the nutrients on their hydroponic plants twice every day to ensure that the plant's nutritional needs are met, besides that the temperature and pH of the water must also be maintained according to plant needs so that plants can grow and develop properly as expected. Controlling the temperature and pH of the water as well as the nutritional needs that are carried out routinely every day by manual method on hydroponic growing media is considered a hassle. Not everyone understands the technical details of care for the ideal conditions of plants that must be maintained, especially for hydroponic beginners. It is necessary to digitize agriculture, through controlling the plant media automatically based on temperature settings, the measurement of nutritional needs and the pH adjusting the types of vegetables planted. Temperature conditions are monitored using a DS18B20 waterproof sensor with a thermoelectric cooler as a temperature stabilizer actuator in ideal conditions. Meanwhile, the nutritional requirements are calculated based on the type of plant, the reading of potential hydrogen (pH) levels by the pH sensor and the electrical conductivity (EC) value by the EC and TDS sensors are continuously responded by the peristaltic pump to determine the amount of solution and ideal nutritional requirements for plant. The control method (PID) which is implemented in active / non-peristaltic pump activities to control temperature, pH of the solution and nutritional needs based on the EC value of the solution is more precise and only a few times an error with an error value ranging from 1 - 2 ml.
Analysis of Wear in UHMWPE Artificial Hip Joint Using Finite Element Method: A Review Wahyudi, Mujib; Nur, Achmad Zain
Sains Data Jurnal Studi Matematika dan Teknologi Vol 2, No 2: July-December 2024
Publisher : Sekolah Tinggi Agama Islam Nurul Islam Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52620/sainsdata.v2i2.131

Abstract

Ultra-high-molecular-weight polyethylene (UHMWPE) is one of the most commonly used materials in the fabrication of artificial hip joints due to its excellent mechanical properties, biocompatibility, and wear resistance. Despite its advantages, the wear of UHMWPE components over time leads to the generation of wear particles, which are responsible for osteolysis and implant failure. The Finite Element Method (FEM) has emerged as a powerful tool to simulate the wear mechanisms of UHMWPE in hip implants, providing a deeper understanding of the stress distribution, wear prediction, and optimization of implant designs. This review explores the current state of FEM applications in UHMWPE wear analysis, focusing on the material properties, wear mechanisms, FEM simulation models, and future directions in this research area.
Studi Ekperimental Produksi Bioetanol sebagai Bahan Bakar Alternatif menggunakan Limbah Kulit Nanas dan Kulit Pisang Irawan, Ibnu; Wahyudi, Mujib
Sains Data Jurnal Studi Matematika dan Teknologi Vol 3, No 1: January - June 2025
Publisher : Sekolah Tinggi Agama Islam Nurul Islam Mojokerto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52620/sainsdata.v3i1.206

Abstract

Kebutuhan bahan bakar minyak setiap tahunnya meningkat namun ditengah meningkatnya bahan bakar minyak sebagai kebutuhan primer. Bahan bakar minyak mengalami kelangkaan yang disebabkan oleh meningkatnya volume kendaraan tiap tahunnya. Solusi untuk menanggulangi kelangkaan bahan bakar ini dengan cara menggunakan bahan bakar alternatif seperti bioetanol yang dapat diproduksi menggunakan bahan baku yang berasal dari limbah pertanian. Penelitian ini bertujuan untuk mencari kombinasi terbaik dari bahan baku kulit pisang dan kulit nanas untuk dijadikan bioetanol. Penelitian ini menggunakan metode hidrolisis, fermentasi, dan destilasi. Kombinasi bahan baku terbaik terdapat pada 0 gr kulit nanas dan 200 gr kulit pisang dengan menggunakan campuran mikroorganisme Sachromyces Cerevise (17) gr saat proses fermentasi yang menghasilkan kadar alkohol sebesar 60,3 %. Kombinasi ini memiliki nilai randeman sebesar 0,92% dan nilai kalor sebesar 7,6. Kombinasi bahan baku yang memiliki kadar bioetanol paling rendah adalah 200 gr kulit nanas dan 0 gr kulit pisang dengan campuran mikroorganisme Effectif Microorganisme 4 (17 ml) saat proses fermentasi yang menghasilkan kadar alkohol sebesar 47,0 % kombinasi ini memiliki nilai randeman sebesar 8,5 dan nilai kalor sebesar 0,93. Penelitian ini menyimpulkan bahwa kombinasi bahan baku terbaik adalah 0 gr kulit nanas dan 200 gr kulit pisang dengan campuran mikroorganisme Sachromyces Cerevise (17 gr).
Comparative Characterization of Indonesian AISI 316L Stainless Steel and Commercial Femoral Stem for Artificial Hip Joint Applications Wahyudi, Mujib; Ismail, Rifky
Jurnal Konversi Energi dan Manufaktur Vol. 11 No. 1 (2026)
Publisher : Universitas Negeri Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21009/JKEM.11.1.7

Abstract

The development of the femoral stem, part of the artificial hip joint, requires a material with microstructures, mechanical properties, and chemical composition that meet the requirements of a medical implant. This study aims to characterize and compare Indonesian AISI 316L stainless steel with two commercial femoral stem implants used by patients, namely XYZ products from the United States and ABC products from India. The tests carried out on the three products include tensile tests, macro hardness, microhardness, microstructure observations, and chemical composition analysis. The tensile test results show that XYZ products have the highest ultimate tensile strength (UTS) of 1065.6 ± 11.7 MPa, while the Indonesian AISI 316L (IDN) and ABC products showed lower UTS values of 580.9 ± 0.3 and 536.3 ± 9.4 MPa, respectively. Microhardness tests showed that XYZ products achieved the highest hardness value of 306.0 ± 13.5 VHN with an increasing hardness gradient towards the surface. Meanwhile, the Indonesian AISI 316L materials showed a relatively homogeneous hardness distribution with an average value of approximately 197.5 ± 1.3 VHN. Observation of microstructures reveals differences in grain size and distribution, which correlate with microhardness values. Analysis of the elemental composition shows that all three materials exhibit characteristics of austenitic stainless steel with variations in the alloy element content. Overall, the results highlight the influence of microstructural features and alloy composition on mechanical performance. Although the Indonesian AISI 316L material evaluated in this study is not classified as implant-grade stainless steel, the findings provide a baseline reference for future material development. It emphasizes the need for strict compliance with implant-grade standards, manufacturing optimization, and surface treatment to enable potential application in femoral stem component.
Co-Authors Ibnu Irawan Nur, Achmad Zain Rifky Ismail Rusidy, Amin Sri Wahyuni