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All Journal TEKNIK Teknika Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Jurnal Sains Materi Indonesia Prosiding Semnastek JFA (Jurnal Fisika dan Aplikasinya) Science and Technology Indonesia Biodidaktika : Jurnal Biologi dan Pembelajarannya Jurnal SOLMA Jurnal Teori dan Aplikasi Fisika Jurnal Fisika Indonesia Jurnal Riset Teknologi Pencegahan Pencemaran Industri Journal of Energy, Material, and Instrumentation Technology NEAR: Jurnal Pengabdian kepada Masyarakat AMMA : Jurnal Pengabdian Masyarakat
Marjunus, Roniyus
Department Of Physics, Faculty Of Mathematics And Natural Sciences, University Of Lampung, Bandar Lampung
Humanities Astronomy Automotive Engineering Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Earth & Planetary Sciences Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Health Professions Immunology & microbiology Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Library & Information Science Materials Science & Nanotechnology Nursing Physics Public Health Social Sciences Transportation Other

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Design and Realization of Temperature and Speed Control System of Meyer Rod Coating Based on Arduino for Silver Nanowires Thin Film Applications Junaidi, Junaidi; Irvana, Raihan; Ayu, Humairoh Ratu; Karo , Pulung Karo; Surtono, Arif; Marjunus, Roniyus; Hadi, Sutopo
Jurnal Penelitian Fisika dan Aplikasinya (JPFA) Vol. 13 No. 2 (2023)
Publisher : Universitas Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26740/jpfa.v13n2.p95-105

Abstract

The design and implementation of an Arduino-based temperature and speed control system for Meyer rod coating have been successfully accomplished. The tool is capable of automatically regulating the temperature and speed of the plate and Meyer rod. The components utilized in manufacturing the coating tool include Arduino Uno, stepper motor, thermocouple sensor, heating plate, relay, stepper motor driver (TB6560), and thermocouple sensor supported by the MAX-6675 module. The motivation behind developing this tool stems from the inconsistency in temperature and speed during manual Meyer rod coatings, where substrate transfer to the heater is done manually. Therefore, the purpose of this tool is to make the rod's pressure and speed stable, and the substrate does not need to move. The results of this study are that the stepper motor achieved a remarkable speed accuracy of 99%, and the thermocouple sensor exhibited an accuracy of 88.43%. Further, the time required for the heater to reach 100 °C was 09.45 minutes.
Otomasi hybrid pada Sistem Pertanian Cerdas Berbasis Internet of Things (IoT) Setyawan, Dodi Yudo; Warsito; Marjunus, Roniyus; Sumaryo, Sumaryo
TEKNIKA Vol. 18 No. 2 (2024): Teknika Juli - Desember 2024
Publisher : Politeknik Negeri Sriwijaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5281/zenodo.12058741

Abstract

Kontrol dan monitoring tanaman secara otomatis pada Smart Farming harus dilakukan untuk menjaga tanaman tumbuh berkembang dan hasil panen yang baik. Koneksi jaringan internet yang buruk pada Internet of Things Smart farming system mengakibatkan buruknya automasi yang dilakukan. Diperlukan Otomasi Hybrid untuk menanggulanginya. Menggabungkan online dan offline automation menggunakan NodeMCU dan Arduino Mega untuk membangun hybrid automation. Hasil penelitian menunjukan bahwa Hybrid Automation pada Internet of Things Smart Farming System sangat penting dan harus ada. Kontrol dan monitoring tanaman pada sistem smart farming dapat terus dilakukan dalam keadaan koneksi jaringan internet baik atau buruk.
Automasi dan Internet of Things (IoT) pada Pertanian Cerdas: review artikel pada Jurnal Terakreditasi Kemenristek Setyawan, Dodi Yudo; Warsito, Warsito; Marjunus, Roniyus; Sumaryo, Sumaryo
Prosiding Semnastek PROSIDING SEMNASTEK 2024
Publisher : Universitas Muhammadiyah Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Pertanian cerdas adalah model pertanian yang melibatkan atau memanfaatkan teknologi otomasi dan Internet of Things (IoT) dalam praktik pertaniannya. Inovasi teknologi ini memiliki peran sentral dalam meningkatkan daya saing dan dinamika pertanian di Indonesia, serta diperlukan lebih banyak penelitian yang mendalam di bidang ini. Review yang mendalam perlu dilakukan pada penelitian-penelitian yang telah terbit pada jurnal yang terakreditasi oleh Kemenristek. Review ini bertujuan untuk mengetahui sejauh mana teknologi otomasi dan IoT yang telah diterapkan oleh para peneliti. Review ini dimulai dari penelusuran metadata artikel pada Google Scholar dengan kata kunci IoT, otomasi, dan pertanian cerdas menggunakan aplikasi Publish or Perish (PoP). Diperoleh 162 metadata artikel, review dilakukan dari review parsial hingga review mendalam, dan diperoleh 29 artikel terakreditasi Kemenristek. Review mendalam dengan Research Question (RQ) diperoleh informasi bahwa artikel terbanyak terbit pada jurnal ranking 4 akreditasi Kemenristek, trend penelitian naik dari tahun ke tahun, sensor dan tools IoT yang paling banyak digunakan adalah sensor kelembaban tanah dan website.Kata kunci—Pertanian cerdas, IoT, automasi, review
Analysis of the Effect of Saltwater (NaCl) Solution Concentration During the Quenching Process on the Microstructure and Hardness of Medium Carbon Steel Supriadi, Agus; Suka, Ediman Ginting; Marjunus, Roniyus
Journal of Energy, Material, and Instrumentation Technology Vol 6 No 1 (2025): Journal of Energy, Material, and Instrumentation Technology
Publisher : Departement of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jemit.v6i1.52

Abstract

Centrifugal pumps type Overhung 4 size 4x11 often experience sand deposits and erosion problems, especially in the oil and gas industry, resulting in reduced productivity and increased repair costs. This study evaluates the application of the Piping Plan 13 API 682 as a solution to this problem. The 5-Why Analysis method is used to identify the root cause of sand deposits, which were associated with sand contamination from a liquid source and the absence of an effective filtering system. The implementation of Piping Plan 13 aims to prevent sand deposits in critical areas, such as the Pedestal Cover and Pedestals, by leveraging the circulation design of the pipeline. The results showed a 19.75% increase in pump productivity and a 76.12% reduction in repair costs. Productivity increases reached 336,000 barrels (about 53,419,731 liters) over 16 days of operation, while the repair cost fell from Rp6,699,950 to Rp1,600,000. These findings indicate that Piping Plan 13 API 682 is an effective solution to increase the life and performance of the centrifugal pump and reduce maintenance costs in operating conditions with high sand contamination.
The Effect of Bentonite and Palm Shell Ash on The Mechanical and Physical Properties of Geopolymer Concrete Hendronursito, Yusup; Amin, Muhammad; Chambioso, Yugo; Suharto; Marjunus, Roniyus
Jurnal Riset Teknologi Pencegahan Pencemaran Industri Vol. 13 No. 2 (2022): November
Publisher : Balai Besar Standardisasi dan Pelayanan Jasa Pencegahan Pencemaran Industri

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21771/jrtppi.2022.v13.no2.p21-27

Abstract

Geopolymer concrete is an alternative to obtaining environmentally friendly mortar by synthesizing materials that contain a lot of aluminum silicate. This study aims to determine the effect of bentonite and palm shell ash composition on geopolymers' physical and mechanical characteristics. All materials are mashed, mixed, and molded with a 5x5x5 cm3 cube. Ten specimens were prepared with bentonite - palm shell ash compositions are 40/45, 45/40, 50/35, 55/30, and 60/25 wt%. Meanwhile, the composition of NaOH, Na2SiO3, superplasticizer and water remained at 1.3, 7.7, 2, and 5 wt%, respectively. Then the samples were dried at room temperature for 24 hrs and heated at 60 °C or 80 °C for 12 hrs. The geopolymer concrete with the best characteristics was obtained with a composition of 40 wt% bentonites and 45 wt% palm shell ash by heating at 80 °C. This specimen has a compressive strength of 11.94 MPa with a density of 2.42 g/cm3, porosity of 8.43%, and absorption of 3.48%. The results have a chemical composition of 55.59% SiO₂, 9.45% Al2O3, and 8.22 Fe2O3 with a dominant quartz phase. Scanning electron microscope photo shows good bonding between particles, and there are no pores formed.
Peningkatan Kualitas Pemahaman Konten dan Teknik Pengajaran Mata Pelajaran Fisika, Kimia, Matematika, Biologi, dan Teknologi Informasi Komputer (TIK) Roniyus Marjunus; Kamisah Delilawati Pandiangan; Amanto Amanto; Mahfut Mahfut; Yunda Heningtyas; Heri Satria
Jurnal SOLMA Vol. 12 No. 1 (2023)
Publisher : Universitas Muhammadiyah Prof. DR. Hamka (UHAMKA Press)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22236/solma.v12i1.10201

Abstract

Background: Pembelajaran Fisika, Kimia, Matematika, Biologi dan Teknologi Informasi-Komputer (TIK) atau disingkat MIPA-TIK di level Sekolah Menengah Atas (SMA) merupakan salah satu bagian dari komponen pendidikan tersebut. Pemahaman yang baik dan benar dari siswa SMA tentang MIPA-TIK diperlukan agar siswa SMA tidak lagi memandang mata pelajaran tersebut sebagai ilmu pengetahuan yang sukar. Oleh karena itu tingkat kualitas pemahaman guru-guru mata pelajaran tersebut di Provinsi Lampung umumnya dan Kabupaten Lampung Selatan khususnya, memegang peranan yang sangat penting. Metode: Evaluasi dilakukan pada awal kegiatan (pre-test) dan akhir kegiatan (post-test) untuk melihat keberhasilan dari kegiatan ini. Hasil: Hasil post-test dibanding pre-test sebesar 45,8%. Kesimpulan: terjadi peningkatan kemampuan atau kompetensi guru-guru dalam menyampaikan materi mata pelajaran tersebut secara baik dan benar.
Pendalaman Materi Dan Transfer of Knowledge Bidang MIPA-I Bagi Guru MGMP SMA Kota Metro, Lampung Nugroho Susanto, Gregorius; Marjunus, Roniyus; Nuryaman, Aang; Eka Febriansyah, Febi; Lidya Susanti, Nida
AMMA : Jurnal Pengabdian Masyarakat Vol. 4 No. 11 : Desember (2025): AMMA : Jurnal Pengabdian Masyarakat
Publisher : CV. Multi Kreasi Media

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

Quality Education is one of the 17 goals of the Sustainable Development Goals (SDGs) 2030 launched by the United Nations in 2015. The teaching of Physics, Biology, Mathematics, and Informatics (MIPA-I) at the senior high school level constitutes an essential component of this goal. Adequate student understanding of MIPA-I is necessary to reduce the perception of these subjects as difficult and to prepare students for higher education. Such understanding is strongly influenced by teachers’ mastery of subject content and instructional methods. Therefore, improving the quality of content and knowledge transfer strategies among MIPA-I teachers, particularly in Lampung Province and Metro City, is of critical importance. A teacher development program involving members of the Senior High School Subject Teacher Forum (MGMP) of Metro City was implemented to enhance teachers’ competencies in delivering instructional materials, as indicated by an 85% increase in post-test scores compared to pre-test results.
Pengaruh Penambahan Abu Sekam Padi Terhadap Sifat Fisis dan Mekanis pada Mortar Ahmad Munawir Siregar; Roniyus Marjunus; Simon Sembiring
Jurnal Teori dan Aplikasi Fisika Vol. 8 No. 1 (2020): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v8i1.243

Abstract

Pengaruh Laju Penginjeksian Doping Fluor terhadap Aktivitas Fotokatalis Nanotitania Menggunakan Metode Sol Gel Sri Rahayu; Posman Manurung; Roniyus Marjunus
Jurnal Teori dan Aplikasi Fisika Vol. 8 No. 2 (2020): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v8i2.260

Abstract

Penerapan Jaringan Saraf Tiruan / JST (Backpropagation) untuk Prakiraan Cuaca di Bandar Udara Radin Inten II Lampung Adi Saputra; Sri Ratna Sulistiyanti; Roniyus Marjunus; Yanti Yulianti; Junaidi Junaidi; Arif Surtono
Jurnal Teori dan Aplikasi Fisika Vol. 11 No. 1 (2023): Jurnal Teori dan Aplikasi Fisika
Publisher : Department of Physics, Faculty of Mathematics and Natural Sciences, University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtaf.v11i1.331

Abstract

Prediksi cuaca diperlukan dalam perencanaan kehidupan sehari-hari, salah satunya untuk membuat keputusan. Keberhasilan dari suatu prediksi cuaca akan berdampak pada pengambilan keputusan di berbagai bidang, antara lain pada bidang pertanian dan penerbangan. Pada bidang penerbangan, prediksi cuaca penting untuk menentukan waktu, lokasi, arah gerak, ketinggian serta merencanakan pergerakan pesawat untuk memperhitungkan gangguan operasi yang dapat disebabkan jika cuaca sedang buruk dan juga untuk mempertimbangkan dalam menentukan rute penerbangan atau menentukan dalam membawa tambahan bahan bakar jika dalam suatu kasus pesawat harus kembali dikarenakan kondisi cuaca yang tidak memungkinkan. Oleh karena itu perlunya sebuah metode prediksi cuaca yang baik sehingga dapat mengurangi kerugian dan kerusakan. Parameter maksimum dalam pengembangan perancangan informasi prakiraan cuaca berbasis Jaringan Saraf Tiruan / JST (Backpropagation) dengan menambah inputan data curah hujan, suhu, kelembaban, penyinaran matahari, tekanan udara, arah angin dan kecepatan angin. Penelitian ini dilakukan di wilayah Bandar Udara Radin Inten II Lampung. Data yang digunakan dalam penelitian ini adalah berupa data harian kondisi meteorologi di wilayah Bandar Udara Radin Inten II Lampung dari Stasiun Meteorologi Radin Inten II selama 3 tahun terakhir yaitu dari tahun 2017 hingga tahun 2019. Data tersebut dibutuhkan sebagai data masukan untuk algoritma yang akan digunakan dalam penelitian. Berdasarkan pada hasil penelitian, diperoleh akurasi pelatihan terbaik sebesar 100% pada arsitektur jaringan syaraf tiruan dengan parameter fungsi pelatihan levenberg-marquardt (trainlm) dan scaled conjugate gradient (trainscg), fungsi aktivasi sigmoid biner dan sigmoid bipolar, dan jumlah neuron 20, 40, 60, 80, dan 100. Sedangkan akurasi pengujian terbaik sebesar 74.359% pada arsitektur jaringan syaraf tiruan dengan parameter fungsi pelatihan gradient descent wit momentum and adaptive learning rate (traingdx) dan fungsi aktivasi sigmoid biner (logsig) dan jumlah neuron 20 dan 80.Kata kunci: Penerapan Jaringan Saraf Tiruan, Prakiraan Cuaca, Bandar Udara Radin Inten II Lampung.Weather prediction is needed in planning daily life, one of which is to make decisions. The success of a weather prediction will have an impact on decision making in various fields, including agriculture and aviation. In the field of aviation, weather prediction is important to determine the time, location, direction of motion, altitude and plan the movement of aircraft to take into account operational disturbances that can be caused if the weather is bad and also to consider in determining flight routes or determining in carrying additional fuel if in an emergency. In the case of the aircraft having to return due to unfavorable weather conditions. Therefore the need for a good weather prediction method so as to reduce losses and damage. In this case the author tries to focus on the maximum parameters in the development of weather forecasting information design based on Artificial Neural Networks / Backpropagation by adding input data of rainfall, temperature, humidity, sunlight, air pressure, wind direction and wind speed. This research was conducted in the area of Radin Inten II Airport, Lampung. The material used in this study is in the form of daily data on meteorological conditions in the Radin Inten II Lampung Airport area from the Radin Inten II Meteorological Station for the last 3 years, from 2017 to 2019. This data is needed as input data for the algorithm that will be used in study. Based on the research results, the best training accuracy is 100% on the artificial neural network architecture with levenberg-marquardt training function parameters (trainlm) and scaled conjugate gradient (trainscg), binary sigmoid and bipolar sigmoid activation functions, and the number of neurons 20, 40, 60, 80, and 100. Meanwhile, the best test accuracy is 74,359% on the artificial neural network architecture with the training function parameters gradient descent wit momentum and adaptive learning rate (trainingdx) and binary sigmoid activation function (logsig) and the number of neurons 20 and 80. Keywords: Application of Artificial Neural Networks, Weather Forecast, Radin Inten II Airport Lampung
Co-Authors Aang Nuryaman Adi Saputra Agus Riyanto Agus Riyanto Agus Supriadi Agustrina, Rochmah Ahmad Munawir Siregar Ahmad Rosadi Al Muttaqii, Muhammad Amanto Amanto Amanto Amanto Amir Supriyanto Anggi Stevani Birawidha, David Candra Chambioso, Yugo Clarasati, Frista Dewi, Jilda Sofiana Diah Purwarini Dita Rahmayanti Dwi Asmi Dwi Asmi Ediman Ginting Ediman Ginting Suka Eka Febriansyah, Febi Endarmoko - Fitri, Nuzullia Fuadiyah, Nadhifatul Harry Supriadi Heningtyas, Yunda Heri Satria Heri Satria Humairoh Ratu Ayu Imam Prayogi Indah Pratiwi Iqbal Firdaus Irvana, Raihan Isnugroho, Kusno Junaidi - Junaidi Junaidi Junaidi Junaidi Junaidi Junaidi Kamisah Delilawati Pandiangan Kamisah Delilawati Pandiangan Kamsul Abraha Karo , Pulung Karo Lidya Susanti, Nida Lilik Widia Mahfut Malik, Daffa Abdul Muhammad Amin Muhammad Rizki Muslim Muslim Muttaqqi, Muhammad Al Nadia Febriyanti Nainggolan, Nurul Istiqomah Nanda Efbriyansyah Nugroho Susanto, Gregorius Posman Manurung Pulung Karo-Karo Putri, Aprilia Eka Rahayu, Sri Rianggi Wahyuni Pratiwi Rio Orlando Pratama Setyawan, Dodi Yudo Simon Sembiring Simon Sembiring Slamet Sumardi, Slamet Solly Aryza Sri Rahayu Sri Ratna Sulistiyanti Sri Wahyu Suciyati Sudibyo SUHARTO Suharto Suharto Suka, Ediman Ginting Sumaryo Sumaryo Sumaryo Suprihatin Supriyatna, Yayat Iman Surtono, Arif Sutopo Hadi Syafiadi Syafriyadi Syafriadi Syafriadi Syaifudin Taufik Nurrohman Tiara Widiastuti Trismahargyono Trismahargyono Ulfa Nurini Warsito Warsito Warsito Warsito Wawan Rustyawan Widi Astuti Yanti Yulianti Yanti Yulianti Yanti Yulianti Yudhistira Novita Handayani Yusup Hendronursito, Yusup