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All Journal OPSI Hipotenusa: Journal of Research Mathematics Education (HJRME) Journal of Batteries for Renewable Energy and Electric Vehicles
Wahyu Tri Utami
Universitas Islam Sultan Agung
Chemical Engineering, Chemistry & Bioengineering Education Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Other

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PENGEMBANGAN MODUL ELEKTRONIK MATEMATIKA MATERI TURUNAN MENGGUNAKAN KVISOFT FLIPBOOK MAKER PRO Utami, Wahyu Tri; Yuwaningsih, Dian Ariesta
Hipotenusa Journal of Research Mathematics Education (HJRME) Vol 7, No 1 (2024): Hipotenusa Journal of Research Mathematics Education (HJRME)
Publisher : Universitas Muhammadiyah Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36269/hjrme.v7i1.1385

Abstract

Penelitian ini bertujuan untuk mengembangkan bahan ajar modul elektronik matematika materi turunan menggunakan software Kvisoft Flipbook Maker Pro serta untuk mengetahui kelayakan modul elektronik yang dikembangkan. Penelitian ini menggunakan metode penelitian dan pengembangan (RnD) dengan model pengembangan ADDIE. Subjek uji coba adalah ahli materi, ahli media, dan peserta didik kelas XI MIPA SMA Negeri 2 Banguntapan. Instrumen penelitian yang digunakan ialah angket validasi ahli materi, angket validasi ahli media dan angket respon peserta didik, wawancara, dan dokumentasi. Tahap uji coba terdiri dari dua tahap yaitu uji coba kelas kecil dan uji coba kelas besar. Tahap uji coba kelas kecil melibatkan 4 peserta didik, sedangkan tahap uji coba kelas besar melibatkan 24 peserta didik. Hasil dari penelitian ini menunjukkan bahwa modul elektronik memperoleh nilai kelayakan oleh ahli materi sebesar 97,5 dengan kategori sangat baik, nilai kelayakan oleh ahli media sebesar 81 dengan kategori sangat baik, dan nilai kelayakan oleh peserta didik sebesar 81,45 dalam uji coba kelas besar dengan kategori sangat baik. Dengan demikian, dapat disimpulkan bahwa modul elektronik matematika materi turunan menggunakan Kvisoft Flipbook Maker Pro yang dikembangkan dianggap layak untuk digunakan dalam pembelajaran matematika.
The Calcination Temperature Effect on Crystal Structure of LiNi1/3Mn1/3Co1/3O2 Cathode Material for Lithium-Ion Batteries Rahayu, Sri; Saudi, Aghni Ulma; Tasomara, Riesma; Gumelar, Muhammad Dikdik; Utami, Wahyu Tri; Hapsari, Ade Utami; Raharjo, Jarot; Rifai, Abdulloh; Khaerudini, Deni Shidqi; Husin, Saddam; Saputra, Dita Adi; Yuliani, Hanif; Andrameda, Yurian Ariandi; Taqwatomo, Galih; Arjasa, Oka Pradipta; Damisih, Damisih; Hardiansyah, Andri; Pravitasari, Retna Deca; Agustanhakri, Agustanhakri; Budiman, Abdul Hamid
Journal of Batteries for Renewable Energy and Electric Vehicles Vol. 1 No. 02 (2023): NOVEMBER 2023
Publisher : NBRI Press

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59046/jbrev.v1i02.22

Abstract

The lithium-ion battery has gained popularity among other secondary batteries for portable electronic devices and electric vehicle applications, especially the LiNi1/3Co1/3Mn1/3O2 or NMC111, considering its well-balanced configuration resulting in stable and safe electrochemical performance. NMC111 has been successfully prepared using a coprecipitation process at calcination temperatures from 800 to 950°C. The physical characteristics were investigated using X-Ray Diffraction (XRD), Scanning Electron Microscopy-Energy Dispersive Spectroscopy (SEM-EDS), and Particle Size Analysis (PSA). The XRD patterns showed the rhombohedral single phase for all calcination temperatures. Meanwhile, higher calcination temperatures offer higher degree of crystallinity, lower intensity ratio and more undesirable cation mixing. The particles with a uniform rectangle or pyramid shape are observed at the calcination temperature range from 800 to 900°C. However, bigger submicron particles with a rectangle or pyramid shape are detected at a higher temperature (950°C). The SEM-EDS mapping shows the homogeneity composition for all variation calcination temperatures. PSA analysis showed that calcination temperature at 800 and 850°C gives the particle less than 400 nm suggesting a potential material for a cathode of lithium-ion batteries.
A hybrid Genetic Algorithm and Fuzzy Logic approach to ergonomic design of workstations in metal casting operations Berlianty, Intan; Soejanto, Irwan; Titisariwati, Indun; Putra, Favian Ersanta Andhika; Utami, Wahyu Tri; Insani, Mohamad Kamil
OPSI Vol 17 No 2 (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.v17i2.13943

Abstract

The metal casting industry faces significant challenges in balancing productivity with worker safety and well-being. Hazardous working conditions, including high temperatures, exposure to gases, and repetitive motions, increase the risk of injuries and fatigue. 1 This study proposes a novel hybrid approach that integrates Genetic Algorithm (GA) and Fuzzy Logic (FL) to optimize workstation ergonomics. The system utilizes real-time data from sensors to evaluate ergonomic factors such as worker posture, fatigue levels, and environmental conditions. Fuzzy Logic processes this data, while GA optimizes the system's parameters for enhanced accuracy and adaptability. Experimental results demonstrated significant improvements, including a 25% reduction in worker fatigue, a 30% improvement in air quality compliance, and a 35% decrease in ergonomic risks. Real-time adjustments, such as desk height modifications and improved ventilation, effectively enhanced worker safety and comfort. This innovative approach offers a scalable and reliable solution for improving ergonomics in dynamic industrial environments, contributing to both worker well-being and operational efficiency. Future research could further enhance the system by incorporating machine learning for improved predictive capabilities and expanded optimization of ergonomic parameters.
Co-Authors Abdul Hamid Budiman Agustanhakri, Agustanhakri Andrameda, Yurian Ariandi Damisih, Damisih Deni Shidqi Khaerudini Dian Ariesta Yuwaningsih Gumelar, Muhammad Dikdik Hapsari, Ade Utami Hardiansyah, Andri Husin, Saddam Indun Titisariwati, Indun Insani, Mohamad Kamil Intan Berlianty Irwan Soejanto Jarot Raharjo Oka Pradipta Arjasa Pravitasari, Retna Deca Putra, Favian Ersanta Andhika Rifai, Abdulloh Saputra, Dita Adi Saudi, Aghni Ulma SRI RAHAYU Taqwatomo, Galih Tasomara, Riesma Yuliani, Hanif