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Radissa Dzaky Issafira
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Department of Mechanical Engineering, Faculty of Engineering, Universitas Pembangunan Nasional Veteran Jawa Timur 1st floor Giri Reka Building, East Java, Indonesia Jl. Raya Rungkut Madya, Gunung Anyar Surabaya Jawa Timur 60294 Indonesia
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Kota surabaya,
Jawa timur
INDONESIA
Biomedical and Mechanical Engineering Journal
Published by Universitas Pembangunan Nasional Veteran Jawa Timur
ISSN : -     EISSN : 27761983     DOI : -
Core Subject : Science, Engineering,
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
The Biomej Journal is published by the Mechanical Engineering Study Program, Faculty of Engineering, East Java "Veteran" University, Surabaya-Indonesia. Biomej is an open-access peer review journal that mediates the dissemination of academics, researchers, and practitioners in the field of mechanical engineering and accepts journal publications from all over Indonesia. Biomej aims to provide a forum for national and international academics, researchers and mechanical engineering practitioners to publish original articles. All accepted articles will be published and will be freely available to all readers with wide visibility. The scope of the Biomej Journal is including widely topics in engineering such as: 1. Biomedical engineering 2. Tribology 3. Modelling 4. Finite ELement Method 5. Material Science 6. Mechatronics 7. Structural and Machiine Design 8. Stress Analysis 9. Renewable Energy 10. Structural Mechanics 11. Thermodynamics 12. Material Processing 13. Fatigue and Air Conditioning 14. Heat Transfer 15. Manufacturing 16. Fluid Mechanics 17. Combustion 18. Aeodynamics 19. Environmental Protection 20. Acoustic and Noise 21. Energy Studies 22. Refrigerationand Air 23. Conditioning 24. Engines and Turbines 25. Thermodynamics 26. Earth Science 27. Natural Hazards 28. Food Technology Processing
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 90 Documents
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Torque Load Analysis on Rear Axle Shaft Material AISI 4340 Normalized FA Nurmansyah; L Edahwati; RD Issafira; W Saputro; AK Faizin; TP Sari; WD Lestari; N Adyono
BIOMEJ Vol. 2 No. 2 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

The choice of rear axle shaft material on the car needs to be considered because this component affects the performance of the car. This component material is also very necessary, the selection of components used is AISI 4340 Steel Normalized, where this material contains Nickel, Chrom, and Molybden with the characteristics of the AISI 4340 Steel Normalized material is a steel material that has high hardness properties, can accept great pressure and force and not easy to deform. The method used is the Finite Element Method (FEM), this method uses a meshing size of 5 mm, to get more accurate results. Simulation results from rear axle shaft AISI 4340 Steel Normalized to determine the value of stress, strain, and safety factor from load variations of 1200 Nm, 1400 Nm, 1600 Nm, and 2000. The highest maximum stress value occurs at 2000 Nm torque load of 5.586 x 108 Nm. The highest maximum strain value occurs at a torque load of 2000 Nm of 5.034 x 103. The safest value of the safety factor is 2.1 at a torque load of 1200 Nm. The torque load value is directly proportional to the stress and strain values ​​obtained, because the greater the torque load value, the greater the stress and strain values ​​obtained.
Static Loading Analysis on Universal Joint Using Solidworks M Ikhsan; L Edahwati; RD Issafira; W Saputro; AK Faizin; TP Sari; WD Lestari; N Adyono
BIOMEJ Vol. 2 No. 2 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

This static loading analysis introduction training aims to analyze parts universal joints to the tensile test as an effort to accelerate the improvement of vocational teachers' abilities. In the introduction to analysis training this time using software CAD/CAM ie solidworks which is one software CAD/ CAM which is widely used in the manufacturing industry in terms of designing or analyzing a product design. The training method is carried out by first installing solidworks software to computer equipment, secondly making parts from universal joints, third assembling from parts that have been made, fourth doing drawing 2D from part and assembly that have been made, the five static loading analyzes of universal joint parts with tensile test. Election software this is based on its advantages such as easy to learn, widely used in industry, and can be used as a reference for studying software another. As a result of this training, it is hoped that the teachers of SMK Turen Malang will be able to make part3D models and 2D working drawings.
Artificial Neural Network Application for Sepsis Prediction: A Preliminary Study AK Faizin; W Saputro; RD Issafira; L Edahwati; WD Lestari; TP Sari; N Adyono
BIOMEJ Vol. 2 No. 2 (2022): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

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Abstract

Sepsis is one of the leading causes of mortality in hospitalized patients. It is very difficult to find the symptoms of sepsis because of their similarity to the symptoms of other diseases. This paper aims to deliver an artificial neural network implementation in medical decisions support. This study tries to predict sepsis and healthy patient based on vital signs such as heart rate, systolic blood pressure, and diastolic blood pressure taken from the MIMIC-III clinical database. There were several extraction processes applied to vital sign signals such as using the statistical tools, discrete wavelet transforms, and Hilbert-Huang Transform. The ANN algorithm predicts the sepsis patient with 96.7% of accuracy. However, based on the medical requirement for artificial intelligent implementation, this result does not satisfy the requirement as the false positive error is 2.9%.
Analysis of effect Magnesium Ammonium Phospate (MAP) Concentration on Struvite Morphology in A Vertical Reactor Edahwati, Luluk; Sutiyono; Andini, Atika; Dwi Lestari, Wahyu; Puspa Sari, Tria; Adyono, Ndaru; Karaman, Novel
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.22

Abstract

Struvite was a white crystal known as Magnesium Ammonium Phosphate Hexahydrate (MgNH4PO4.6H2O). In industry, struvite was found in the pipes crust which the hot fluid through passes. Struvite is often used as fertilizer because it contains phosphate content. The one of benefits of struvite crystals is slow release fertilizer, so it can be more durable, which is good for the growth of the plants. The Precipitation technology is currently one of the most widely applied technologies in struvite formation. The process of forming struvite is carried out by using a vertical reactor. The process started by mixing the equimolar solutions of MgCl2, NH4OH, and H3PO4 with a concentration ratio of 1: 1: 1 and 1: 1: 2. Theprocess was carried out with the condition at the 30°C while the air inlet rate was 1.25 liters/min. The pH of the solution is pH 9 and controlled using NaOH solution. The process was carried out in the steady state condition. Then the solution was filtered and solid was dried at room temperature for 48 hours. From this study, the concentration ratio of 1:1:2 was obtained the best of struvite compared to the others ratio. The solid was analyzed by using the SEM-EDX instrument. The morphology of struvite was formed an irregular pyramid like crystal or commonly referred to as an authorhombic shape.
SEM Analysis of UHMWPE for Biomedical Application Dwi Lestari, Wahyu; Edahwati, Luluk; Puspa Sari, Tria; Adyono, Ndaru; Karaman, Novel
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.23

Abstract

The objective of this study is to investigate the wear mechanism of UHMWPE acetabular liner. There were three samples of acetabular liner with variations without crosslink, with crosslink doses of 50 kGy and 100 kGy which were subjected to a wear testing process. The wear test was carried out using a Tribometer wear testing machine with a total of 30,000 cycles and a load of 800N. Microstructure analysis was performed using scanning electron microscopy (SEM). The results show that the surface of the UHMWPE acetabular liner with the crosslink treatment is smoother than the untreated one. This shows that UHMWPE with crosslink treatment has a lower wear rate, where the greater the crosslink dose the lower the wear rate. The wear mechanism that occurs in this study is the third body abrasion which leads to adhesive wear.
Aplikasi Portabel Briz Meter untuk Perhitungan Indeks Bias Minyak Astiri Daun Jambu Kristal Fawaid, E S A; Sari, LI; Pujiastuti, C; Erliyanti, N K; Priyanto, A D; Saputro, E A
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.24

Abstract

Penentuan indeks bias minyak daun jambu kristal dilakukan dengan menggunakan Portable Brix Meter. Daun jambu kristal diekstraksi dengan bantuan gelombang mikro dengan ukuran partikel 60 mesh selama 2 ; 2,5 ; 3 ; 3,5 ; dan 4 jam. Portable Brix Meter digunakan untuk mengetahui konsentrasi minyak daun jambu kristal yang dinyatakan dalam %Brix. Besarnya nilai %Brix ini sebanding dengan indeks biasnya. Semakin besar nilai %Brix maka akan semakin besar pula indeks bias yang diperoleh. Korelasi antara %Brix minyak daun jambu C dengan indeks bias dinyatakan dengan persamaan n = 0,0026C + 1,2859. Indeks bias minyak daun jambu kristal dapat ditentukan dari nilai %Brix
Analisa Uji Kelelahan ASS Kuningan 70/30 dengan Mesin Uji Tipe Cantilever Rotary Bending R Adam; N S Dera
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.25

Abstract

Ketahanan material pada masa sekarang ini sangat berperan penting dalam era teknologi. Teknologi berkembang sangat maju dan pesat seiring dengan kemajuan jaman. Berbagai penelitian telah dilakukan oleh berbagai institusi dari seluruh penjuru Dunia untuk menemukan teknologi baru. Penemuan baru tersebut sebagai modal awal untuk menciptakan teknologi yang lebih mutakhir. Seiring dengan perkembangan IPTEK yang sedemikian pesat dewasa ini. Oleh karena itu di butuhkan acuan standar uji fatigue dari suatu material agar para perancang dan pembuat memiliki patokan dasar dalam merancang atau membuat sesuatu agar tidak merugikan atau membahayakan keselamatan penikmat maupun pengguna teknologi. Salah satu cara untuk mengetahui kekuatan atau ketahanan suatu material. Tujuan penelitian hanya menganalisa siklus kelelahan dan ketahanan material Ass kuningan batangan 70/30 hingga mengalami kegagalan atau patah menggunakan metode pengujian fatigue tipe cantilever rotary bending. Konversi satuan beban Kg terhadap Mpa, Konversi satuan waktu detik terhadap waktu putaran. Berdasarkan hasil data yang di dapat dari hasil pengujian fatik tipe cantilever rotarybending yang dilakukan di lab masin fakultas teknik universitas gorontalo. Di tarik kesimpulan secara ilmiah bahwa untuk menganalisis ass kuningan 70/30 pada mesin uji fatik tipe (cantilever rotary bending) dengan jumlah spesimen 4 batang dengan durasi waktu 1 jam mendapatkan data analisis bahwa Spesimen 1 dengan Beban 20 kg mendapatkan tegangan 1.320 Mpa dan siklus 63.700 putaran dan spesimen 2 dengan beban 25 kg mendapatkan tegangan 1650 Mpa dengan siklus 40.012 putaran dan spesimen 3 dengan beban 30 kg mendapatkan tegangan 1981 Mpa dengan siklus 7.350 putaran dan untuk spesimen 4 mendapatkan tegangan 2311 Mpa dengan siklus 816 putaran.
Effects of pH on Adsorption of Remazol Turquoise Blue Dyez on MgO/TiO2 Nanocomposite Abdus Salam Jawwad, Muhammad; Novembrianto, Rizka; Wang, Ya-Fen; You, Shen-Jie; Ayu Murti, Restu Hikmah
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.26

Abstract

A magnesium oxide and titanium (II) oxide nanocomposite, MgO/TiO2 was synthesized to improve its surface area thus its adsorption capability may be risen. The synthesis was applying sol-gel method, combining MgO and TiO2 nanoparticles with NaOH becomes a nanocomposite with higher surface area. The pH effect on adsorption were analyzed. The expectation of using MgO/TiO2 compared with TiO2 and MgO alone is it may react faster on an adsorption trial with remazol turquoise blue dye, and the TiO2 may give its photocatalysis ability to the synthesized material. Less acid the condition of the solution, the capability of the MgO/TiO2 catalyst on adsorbing the remazol turquoise blue dye will increasing. After 90 minutes, the photocatalysis rate surpass the adsorption rate and reach equilibrium.
Pengaruh Campuran Bahan Bakar Pertamax dan Pertalite terhadap Emisi Gas Buang Kendaraan Sepeda Motor Honda Supra X 125CC Tahun 2015 Mubin, Nurul; Anam, Khoirul; Mubin, Towijaya
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.27

Abstract

Perkembangan dunia otomotif yang semakin maju membuat produksi kendaraan bermotor yang menggunakan sistem injeksi semakin banyak untuk memaksimalkan efisiensi emisi gas buang kendaraan, gas buang adalah gas atau zat sisa yang dihasilkan dari sisa pembakaran di dalam mesin kendaraan untuk menggerakkan kendaraan, kadar oktan bahan bakar dapat mempengaruhi kandungan emisi gas buang yang dikeluarkan kendaraan tetapi tidak semua sistem injeksi dapat sesuai dengan oktan bahan bakar yang berada dipasaran hal ini mengakibatkan kendaraan menjadi kurang bertenaga. Tujuan dari penelitian ini adalah untuk mengetahui pengaruh campuran bahan bakar pertamax dan pertalite terhadap kadar CO kendaraan sepeda motor Honda supra x 125cc dan juga mengetahui pengaruhnya terhadap kadar HC. Hasil dari penelitian ini adalah bahwa campuran bahan bakar dapat mempengaruhi kadar CO dan HC kendaraan karena campuran bahan bakar dapat mengubah oktan dari bahan bakar tersebut.
Perancangan Mesin Pengupas dan Pemarus Batang Ubi Kayu: Konsep Rancangan Mesin Karaman, Novel; Adyono, Ndaru; Puspa Sari, Tria; Edahwati, Luluk; Edahwati, Wahyu Dwi Lestari
BIOMEJ Vol. 1 No. 1 (2021): BIOMEJ
Publisher : UPN 'Veteran" Jawa Timur

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33005/biomej.v1i1.28

Abstract

Indonesia is the fifth largest cassava-producing country, where the national cassava production per year reaches 23 million tons. On the other hand, the organic waste in the form of cassava stems with the potential to use a large alpha-cellulose stem content. Alpha-cellulose is a much-needed biomass material in the field of industry and renewable energy sources. Highquality alpha-cellulose is produced from cassava stem fibers that have separated the outer shell. Research in the design of machines capable of processing stripping and sequencing cassava stems simultaneously has the potential to increase the productivity of making Alpha-cellulose raw materials for industrial needs. The prototype design peeling machine and a cassava rod pucker using the engine element approach is expected to produce an engine design that has the specification of a 0.5 HP 3-phase main drive motor with a 1400 rpm rotation consisting of 2 pulley transmissions and a gearbox ratio of 60.

Page 7 of 9 | Total Record : 90

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