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All Journal POSITRON Jurnal Mechanical ROTOR: JURNAL ILMIAH TEKNIK MESIN Jurnal Rekayasa Mesin JRST (Jurnal Riset Sains dan Teknologi) SELAPARANG: Jurnal Pengabdian Masyarakat Berkemajuan Barometer Jurnal Teknik Mesin Jurnal Teknik Mesin Indonesia Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP) Reswara: Jurnal Pengabdian Kepada Masyarakat Jurnal Ilmiah Wahana Pendidikan Relativitas : Jurnal Riset Inovasi Pembelajaran Fisika Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Najmudin Fauji
Universitas Singaperbangsa Karawang
Religion Aerospace Engineering Agriculture, Biological Sciences & Forestry Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Chemistry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Energy Engineering Environmental Science Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Nursing Physics Public Health Social Sciences Other

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Analisa Pengaruh Variasi Temperatur dan Waktu Proses Elektroplating Krom Terhadap Daya Rekat dan Ketebalan Lapisan Pada Plastik ABS Sri Bintang Abdul Rohman; Ratna Dewi Anjani; Najmudin Fauji
Jurnal Ilmiah Wahana Pendidikan Vol 8 No 17 (2022): Jurnal Ilmiah Wahana Pendidikan
Publisher : Peneliti.net

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (230.027 KB) | DOI: 10.5281/zenodo.7080575

Abstract

Plastic is a material that can be used as a substitute for metal, this is because the material has advantages, such as light weight, corrosion resistance, and relatively cheap price. There are several types of plastics such as polyethylene, teflon, polysulfone, polypropylene, acrylonitrile-butadine-styrene (ABS), and so on (1). ABS plastic is the most widely used material for chrome plating. The butdine portion is evenly distributed in the acrylonitrile-styrene matrix, making ABS plastics have advantages such as metal being easier to stick to the substrate, low coefficient of thermal expansion, easy to print, and improved aesthetic appearance (2). Behind the advantages possessed, ABS plastic has weaknesses including hardness, less high friction resistance, and at low temperatures it is easy to damage. To overcome this deficiency, one of the methods used is by electroplating the krum, with variations in temperature, 40°C, 50°C and 60°C, as well as variations in lectroplating time of 10 minutes, 20 minutes, and 30 minutes. . The tests carried out are measuring the adhesive strength of the coating results and the thickness of the layer. The results showed that the temperature and time in the electroplating process affected the adhesion of the coating and the thickness of the layer, where the highest value of adhesion was the variation of time of 30 minutes and a temperature of 40°C with a value of 0.41 MPa and the lowest value of adhesion at a time variation. 10 minutes and a temperature of 60°C with a thickness value of 0.06 MPa. And the highest thickness value is with a time variation of 30 minutes and a temperature of 60°C with a thickness value of 35 m and the lowest thickness value at a time variation of 10 minutes and a temperature of 40°C, 50°C with a thickness value of 20 m
PENGARUH FRAKSI VOLUME TERHADAP KEKUATAN TARIK DAN BENDING KOMPOSIT SERAT SERABUT KELAPA BERMATRIKS POLIESTER Muhammad Aizul Haq; Viktor Naubnome; Najmudin Fauji
ROTOR Vol 15 No 2 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v15i2.33390

Abstract

With natural fibers, namely coconut fibers that are easily found in the surrounding environment and literature studies that have been carried out, starting from the alkalization process, volume fraction, fiber length and utilization which will be used for fiberboard, the author wants to make a composite of coconut fiber fibers and do some The tests are tensile test and bending test. The tensile test results show the smallest tensile strength value at 10% fiber volume variation of 14.64 MPa and the largest tensile strength at 30% volume fraction variation with a value of 20.90 MPa. Increase in fiber volume variation 10% to variation The bending test results show the smallest bending strength value at 10% fiber volume variation of 34.81.64 MPa and the largest tensile strength at 30% volume fraction variation with a value of 49.41 MPa. The increase in the volume of the coco fiber fraction which is directly proportional to the tensile and bending strength values ​​is due to the increasing contribution of the fiber to withstand the load.
ANALISIS KINERJA MESIN AMG CNC PLATE CUTTING MENGGUNAKAN METODE OEE (OVERALL EQUIPMENT EFFECTIVENESS) Dwika Daffa Ashari; Viktor Naubnome; Najmudin Fauji
ROTOR Vol 15 No 2 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v15i2.32408

Abstract

In the industrial world, technology is an important thing that can help improve the quality of the industry. Every company that uses technology definitely needs an adequate maintenance system for tools and machines. The purpose of maintenance is to prevent unexpected machine breakdowns that can result in the production process stopping, endangering worker safety and increasing machine repair costs. One of the machines that are often used in the production process at PT XYZ is the AMG CNC plate cutting machine. Therefore, one method to determine the effectiveness of a cutting machine is Overall Equipment Effectiveness (OEE). Overall Equipment Effectiveness is a measurement made on performance related to the availability of process productivity and quality. As a result, by applying the OEE (Overall Equipment Effectiveness) method for performance analysis of the AMG CNC plate cutting machine, we can find out the value for availability of 91%, performance efficiency of 96%, and rate of quality product of 99%, the measurement results of the AMG CNC plate machine cutting in January 2021 using the OEE method of 86% which has passed the value of the OEE world standard of 85%. the value of the six big losses obtained is the breakdown loss value of 1.8%, the set up and adjustment value of 10%, the idle and minor stoppage value of 3%, the value of reduce speed losses of 5.3%, the value of process defect losses of 1 ,1%, the value of reduce yield losses is 0.06%.
SIMULASI BEBAN RANGKA PADA MESIN PENGGILING SEKAM PADI MENGGUNAKAN PERANGKAT LUNAK Muhammad Alfarhan Ficki; Kardiman Kardiman; Najmudin Fauji
ROTOR Vol 15 No 2 (2022)
Publisher : Jurusan Teknik Mesin Fakultas Teknik Universitas Jember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.19184/rotor.v15i2.32447

Abstract

One of the main components in the rice husk grinding machine is the frame. The frame is the most important fundamental part, especially for use in machinery, because the function of the frame is as a support for the components themselves, and is able to withstand axial, normal and moment forces to maintain stability in the machine. The strength of the frame depends on the shape or type of construction which is able to withstand torsional loading from the engine and also withstand the shock that is given when the engine moves. So the purpose of this study is to find out how to simulate the loading of the frame on a rice husk grinding machine using SolidWorks software, and to know the comparison of theoretical calculations and simulations for 3 material variations on the frame of a rice husk grinding machine in a static state. The method used is the Finite Element Method (MEH), MEH with software can determine the loading points. From this test, researchers can find out which points have a minimum load, a medium load, and a maximum load. The results of the analysis provide the safety value of original and processed materials, changes in materials can be concluded which material is more ideal. The results of this study are that among AISI 1010, ASTM A36, and AISI 1045 materials, the best material is AISI 1045 material because it has the greatest safety factor value of 12.15.
Perhitungan Efisiensi Pengeringan pada Mesin Pengering Gabah Tipe Flat Bed Dryer di CV. XYZ Suhelmi, Muhamad Fadhlan; Anjani, Ratna Dewi; Fauji, Najmudin
Jurnal Rekayasa Mesin Vol 17, No 1 (2022): Volume 17, Nomor 1, April 2022
Publisher : Mechanical Engineering Department - Semarang State Polytechnic

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/jrm.v17i1.2848

Abstract

Semakin meningkat populasi di Indonesia, maka akan semakin meningkat juga kebutuhan pangan, salah satunya yaitu beras. Untuk dapat membuat padi menjadi beras diperlukan proses yang panjang, salah satunya adalah proses pengeringan gabah. Di Indonesia, pengeringan gabah masih mengandalkan panas dari matahari, sehingga jika terjadi hujan, gabah tidak akan kering dengan sempurna. Penelitian ini bertujuan untuk menghitung energi panas dan juga efisiensi pengeringan pada mesin pengering gabah tipe flat bed dryer dengan blower axial fan. Metode yang digunakan adalah metode eksperimental yang dilakukan di CV. XYZ. Hasil analisis menunjukkan bahwa mengeringkan gabah seberat 20 ton dalam 20 jam membutuhkan energi sebesar 8,4 x 106 kJ untuk mengeringkan gabah dengan kadar air awal 28 % menjadi 14 %. Laju perpindahan panas dari blower ke gabah sebesar 9.806,91 W. Sedangkan energi yang disalurkan dari pemanas ke blower sebesar 3,8 x 107 kJ, sehingga efisiensi pengeringan gabah sebesar 22,03 %.
ANALISIS KESTABILAN ENDEMIK MODEL EPIDEMI CVPD (CITRUS VEIN PHLOEM DEGENERATION) PADA TANAMAN JERUK Tesa Nur Padilah; Najmudin Fauji
Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP) Vol 9 No 2 (2017): Jurnal Ilmiah Matematika dan Pendidikan Matematika (JMP)
Publisher : Universitas Jenderal Soedirman

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.20884/1.jmp.2017.9.2.2863

Abstract

Orange fruits are important commodities in Indonesia. However, the efforts to increase production of oranges still have obstacles. One of them is because ofCVPD (Citrus Vein Phloem Degeneration) disease. The spread of CVPD disease in orange plants can be modeled by mathematical model, that is epidemic model betweenorange plants as a host plant and Diaphorina Citri as a vector. In this model, predation response follows Holling Type II response function. The model is then analyzed by checking the stability of the equilibrium point and computing basic reproduction number. This model has an endemic equilibrium point. If the basic reproduction number is more than one then an endemic equilibrium point is locally asymptotic stable or epidemic which means that it occurs in the population. The simulation result of the model are in good agreement with the model behavior analysis.
Effect of Doping Density and Parasitic Resistances on The Performance of Perovskite Solar Cells-based Graphene Oxide as Hole Transport Layer by SCAPS-1D Fauji, Najmudin; Kardiman, Kardiman; Suci, Farradina Choria; Hakim, Muhammad Fahmi; Efelina, Vita; Widianto, Eri
POSITRON Vol 14, No 2 (2024): Vol. 14 No. 2 Edition
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam, Univetsitas Tanjungpura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26418/positron.v14i2.74606

Abstract

Perovskite solar cells (PSCs) have demonstrated remarkable improvement and promise to be produced as large-scale, low-cost devices. Several resistive losses, such as the loss current, the trapping, and the recombination of charge carriers, significantly inhibited the performance of PSCs. Typically, the series resistance (RS) and shunt resistance (RSH) of the devices influence these kinds of losses. In this study, we conduct a simulation analysis to investigate the effect of doping density and parasitic resistances (RS and RSH) on the performance of PSCs-based graphene oxide (GO) as a hole transport layer (HTL) using the SCAPS-1D. The doping density variations in HTL demonstrate improved power conversion efficiency (PCE) and fill factor (FF) as the doping density increases. Both RS and RSH significantly affect the PSC performance, as they control the shape and slopes of the current density (J-V) characteristic. The optimization method produced impressive results, including an open-circuit voltage of 0.94 V, a short-circuit current density of 22.51 mA.cm−2, a fill factor of 78.92%, and a power conversion efficiency of 16.75%. This study leads to a basic understanding of the physics of PSC devices. The proposed design provides a systematic analysis method for photovoltaic science and technology.
Analisis Kestabilan Bebas Penyakit Model Epidemi CVPD (Citrus Vein Phloem Degeneration) pada Tanaman Jeruk dengan Fungsi Respon Holling Tipe II Padilah, Tesa Nur; Fauji, Najmudin
Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya 2017: Prosiding Konferensi Nasional Penelitian Matematika dan Pembelajarannya
Publisher : Universitas Muhammadiyah Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (596.077 KB)

Abstract

Jeruk merupakan komoditas buah-buahan penting di Indonesia. Namun, usaha peningkatan produksi jeruk masih mengalami hambatan, salah satunya akibat penyakit CVPD (Citrus Vein Phloem Degeneration). Penyakit CVPD dapat ditemukan pada semua jenis jeruk di Indonesia. Bagian tanaman yang terserang parah biasanya mengering secara perlahan-lahan kemudian mati, sedangkan serangan ringan mengakibatkan pertumbuhannya terhambat. Penyebaran penyakit CPVD pada jeruk dapat dimodelkan dalam suatu model matematis yaitu model epidemi antara tanaman jeruk sebagai inang dengan serangga Diaphorina Citri (kutu loncat) sebagai hama (vektor). Pada model ini, respon pemangsaan mengikuti fungsi respon Holling Tipe II. Analisis model dilakukan dengan menganalisis kestabilan titik ekuilibrium bebas penyakit dan angka rasio reproduksi dasar. Model ini memiliki satu titik ekuilibrium bebas penyakit. Analisis perilaku model menunjukkan bahwa jika nilai angka rasio reproduksi dasar kurang dari satu, maka titik ekuilibrium tersebut bersifat stabil asimtotik lokal. Ini berarti, untuk jangka waktu tertentu populasi akan bebas dari penyakit. Simulasi model dengan menggunakan software Maple 13 sejalan dengan analisis perilaku model. Berdasarkan angka rasio reproduksi dasar diperoleh bahwa pengendalian yang dapat dilakukan agar populasi bebas dari penyakit CVPD diantaranya dengan pemusnahan tanaman sakit, penggunaan pestisida yang dapat mengendalikan populasi vektor, dan pengadaan bibit jeruk bebas penyakit.
Pencegahan Dampak Negatif Paparan Pestisida dari Aktivitas Pertanian Melalui Kegiatan Edukasi dan Sosialisasi Rahmat, Natasya Shafira Putri; Umam, Hilman Imadul; Mahendra, Bhisma; Widianto, Eri; Yuliasari, Fitri; Aeni, Alfieta Rohmaful; Nuraini, Umi; Fauji, Najmudin; Sobur, Susilawati; Wilda, Saniatun; Hasanah, Putri Nur
Reswara: Jurnal Pengabdian Kepada Masyarakat Vol 6, No 1 (2025)
Publisher : Universitas Dharmawangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.46576/rjpkm.v6i1.5280

Abstract

Desa Telukambulu di Kecamatan Batujaya, Kabupaten Karawang, memiliki luas wilayah lahan pertanian sawah sebesar 84%, hal ini menjadi tantangan para petani dalam pengelolaan pestisida. Penggunaan pestisida yang tinggi akan memberikan dampak negatif pada lingkungan dan kesehatan masyarakat. Data menunjukkan bahwa 41,7% petani di Desa Telukambulu tergolong dalam kelompok lanjut usia. Oleh karena itu, sangat penting untuk meningkatkan pemahaman para petani tentang Keselamatan dan Kesehatan Kerja (K3) dalam penggunaan pestisida. Edukasi K3 serta sosialisasi menggunakan media promosi kesehatan dilakukan untuk mencegah dampak negatif paparan pestisida. Hasil kegiatan menunjukkan bahwa pada saat pretest, pemahaman responden terkait penggunaan pestisida hanya mencapai 36%. Namun, setelah dilakukan sosialisasi, terjadi peningkatan signifikan,dengan rata-rata nilai postest mencapai lebih dari 90%. Peningkatan tersebut mencerminkan pemahaman petani yang lebih memperhatikan aspek K3 dalam penggunaan pestisida. Perubahan ini diharapkan dapat menjadikan para petani sebagai agen perubahan yang berperan dalam pengelolaan pestisida yang berkelanjutan dalam pelestarian lingkungan. Pada akhirnya hal ini akan membentuk masyarakat yang lebih peka terhadap dampak pestisida, mendukung praktik pertanian yang lebih aman, serta mengurangi risiko bagi kesehatan.
Co-Authors Aeni, Alfieta Rohmaful Anjani, Ratna Dewi Billy Nugraha Dewi Marlina Dian Budhi Santoso Dwika Daffa Ashari Efelina, Vita Endah Purwanti Eri Widianto Fajri Julian Habibberi Agil Rabani Hakim, Muhammad Fahmi Hanifi, Rizal Hasanah, Putri Nur Ibrahim Ibrahim Ibrahim Ibrahim Ihsan Budiman Iman Dirja Iqbal Maulana Jojo Sumarjo Kardiman Kardiman, Kardiman Kusumaatmaja, Ahmad Kuwat Triyana Luthfi Rachman Sidqi Ma'mun Abdul Karim Mahendra, Bhisma Marno, Marno Muhamad Rizky Adipratama Muhammad Aizul Haq Muhammad Alfarhan Ficki Muhammad Nur Yasin Naubnome, Viktor Noviana Nurhikmat Padilah, Tesa Nur Rahmat, Natasya Shafira Putri Reni Rahmadewi Reza Setiawan Rifki Maulana Sidik Riza Ibnu Adam Rizal Hanifi Sarah Dampang Slamet Abadi Sobur, Susilawati Sri Bintang Abdul Rohman Suci, Farradina Choria Suhelmi, Muhamad Fadhlan Tesa Nur Padilah Umi Nuraini, Umi Uut Ulis Utomo Vita Efelina Vita Efelina Widianto, Eri Widianto, Eri Wilda, Saniatun YULIASARI, FITRI