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All Journal Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Jurnal Teknika Jurnal Bina Desa
Febry Putra Rochim
Universitas Negeri Semarang
Agriculture, Biological Sciences & Forestry Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Education Electrical & Electronics Engineering Engineering

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Chili Ripeness Level Detection with YOLOv8 and Fuzzy Logic for Harvest Decision Making Ninda Yulia Dwi Rahmawati; Febry Putra Rochim
Jurnal Teknik Pertanian Lampung (Journal of Agricultural Engineering) Vol. 14 No. 5 (2025): October 2025
Publisher : The University of Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jtepl.v14i5.1807-1818

Abstract

Conventional chili harvesting relies on subjective human judgment, resulting in inconsistencies that necessitate a computer vision-based automation system. This study develops a decision support system integrating YOLOv8 for object detection and Mamdani fuzzy logic to assess chili ripeness levels. The YOLOv8 model was trained on 5,598 annotated chili images divided into three ripeness categories: ripe, unripe, and defective (rotten, diseased, or physically damaged), using an 80:20 training-testing split. YOLOv8 classification results serve as inputs to a fuzzy inference system that outputs three linguistic harvest decisions: delay, partial, or full harvest. Experimental evaluation indicates that YOLOv8 achieved 91.2% accuracy, 89.6% precision, and 87.3% recall on the test set. The fuzzy logic system obtained 88% accuracy in harvest decision-making on unseen data, demonstrating output consistency across repeated inferences. Overlapping triangular membership functions enable the fuzzy system to manage intra-class variations and image noise, thereby improving adaptability. These results confirm the feasibility of integrating YOLOv8 and fuzzy logic to support reliable and adaptive automated harvest decisions in chili farming, with potential application in precision agriculture.
Peningkatan Kesadaran Kesehatan Masyarakat Desa Mluweh: Pengukuran Tekanan Darah dan Edukasi Kesehatan Khoiril Anam; Febry Putra Rochim; Safira Chairani Dimarti; Puput Ediyarsari; Ayu Nur Hidayah; M. Syahrul Muafi
Jurnal Bina Desa Vol. 8 No. 1 (2026): Vol 8 No 1 (2026)
Publisher : Universitas Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15294/jurnalbinadesa.v8i1.36618

Abstract

Hypertension remains a public health problem in Indonesia, affecting both the elderly and those of productive age. Low awareness of the importance of health check-ups and a healthy lifestyle is a key contributing factor. This activity, organized by UNNES Community Service Program GIAT 12 students, was held in Mluweh Village, East Ungaran District, with the aim of increasing community awareness and participation in hypertension prevention efforts through an educational and participatory approach. Three main programs were implemented: a fun walk with students from MTs Mujahidin, blood pressure measurements for the elderly and school-age children, and group exercise with the community. The methods used included field observation, focus group discussions, health education, and two blood pressure measurements as a form of screening. The results of the activity demonstrated high community participation, with the majority of children having normal blood pressure and the elderly having low blood pressure. The program also demonstrated that simple physical interventions such as fun walks and exercise are well-received and have the potential to increase long-term health awareness. This activity provides recommendations for routine screening and the ongoing integration of healthy lifestyle education into community and school activities.
Analisis Pengujian Awal Transformator Stepdown 20 kV/400 V Sebelum Dialiri Tegangan Muhammad Zaky Ayyasy Ardhana; Febry Putra Rochim
Jurnal Teknika Vol 18 No 2 (2026): SEPTEMBER
Publisher : Universitas Islam Lamongan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30736/jt.v18i2.1736

Abstract

Transformator merupakan salah satu komponen utama dalam sistem distribusi tenaga listrik yang berfungsi menyalurkan energi listrik melalui perubahan tingkat tegangan sesuai dengan kebutuhan beban. Keandalan transformator sangat berpengaruh terhadap kontinuitas dan stabilitas sistem kelistrikan di lingkungan industri, sehingga diperlukan pengujian awal sebelum transformator dioperasikan (energizing). Penelitian ini bertujuan menganalisis proses pengujian awal transformator step-down 20 kV/400 V di PT Batamindo Investment Cakrawala, khususnya pada Departemen Power House. Metode pengumpulan data meliputi observasi langsung, wawancara dengan teknisi, dokumentasi hasil pengujian, serta studi literatur mengenai standar pengujian transformator. Pengujian yang dianalisis meliputi turns ratio test (TTR), insulation resistance test, dan oil breakdown voltage test (BDV). Hasil analisis menunjukkan bahwa transformator tiga fasa berkapasitas 1000 kVA berada dalam kondisi layak operasi. Pengujian TTR menghasilkan deviasi maksimum sebesar ±0,074%, masih berada dalam batas toleransi standar sehingga menunjukkan kesesuaian rasio lilitan sisi primer dan sekunder. Pengujian tahanan isolasi menggunakan Megger menunjukkan nilai ≥1000 MΩ pada tegangan uji 5000 VDC, yang mengindikasikan kondisi isolasi sangat baik. Selain itu, hasil pengujian tegangan tembus minyak transformator (BDV) memperoleh nilai rata-rata sebesar 40,83 kV, melebihi batas minimum yang dipersyaratkan dalam standar pengujian. Berdasarkan hasil tersebut, transformator dinyatakan memenuhi persyaratan teknis dan siap dioperasikan pada sistem distribusi tenaga listrik di lingkungan industri.
Co-Authors Ayu Nur Hidayah Khoiril Anam M. Syahrul Muafi Muhammad Zaky Ayyasy Ardhana Ninda Yulia Dwi Rahmawati Puput Ediyarsari Safira Chairani Dimarti