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All Journal ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Computer Science (CO-SCIENCE) Jurnal Alat Berat
Musrinah Musrinah
Politeknik Negeri Bandung
Automotive Engineering Computer Science & IT Electrical & Electronics Engineering Energy Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Integrating LLM Intent-Aware Approach for Enhancing the Quality of Bundle Recommendations Andy Maulana Yusuf; Musrinah Musrinah
Computer Science (CO-SCIENCE) Vol. 6 No. 2 (2026): July 2026
Publisher : LPPM Universitas Bina Sarana Informatika

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31294/co-science.v6i2.12101

Abstract

Digital grocery shopping has shifted consumer patterns toward multi- item purchasing. While bundle recommendation systems address this, existing models relying on product ID co-occurrence fail to capture the mixed shopping intentions inherent in consumer baskets. To address these limitations, we propose Intent-aware Bundle Recommendation (IABR), a framework shifting from structural matching to semantic intent reasoning. IABR utilizes Large Language Models to decompose baskets into coherent sub-packages. Subsequently, we fine- tuned Gemma-3-4B using Parameter-Efficient Fine-Tuning to generate narrative intent descriptions regarding short-term shopping missions and long-term sustainable user lifestyles. These intents are encoded via Sentence Transformers for semantic retrieval. Extensive testing on the Instacart dataset demonstrates IABR’s significance against baselines like BGCN. Our IABR method achieved a Recall@20 of 28.15% while improving diversity scores by 12% (p < 0.05). This validates that generative semantic modeling enables accurate next- bundle predictions, effectively balancing precision with thematic variation and personalization.
Master-Slave Synchronization in Off-Grid Solar Microgrids: Genset and Inverter Configurations IGNATIUS RIYADI MARDIYANTO; MUSRINAH MUSRINAH; SRI PARYANTO MURSYID; SRI UTAMI; WILDAN ARASSID; RIDWAN NURDIN; AGOENG HARJATMO RAHARDJO; TJATUR UDJIANTO; APIP PUDIN
ELKOMIKA: Jurnal Teknik Energi Elektrik, Teknik Telekomunikasi, & Teknik Elektronika Vol 14, No 3: Published July 2026
Publisher : Institut Teknologi Nasional, Bandung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.26760/elkomika.v14i3.274

Abstract

The research analyzes the synchronization performance of off-grid solar AC microgrids by comparing genset-based and inverter-based master-slave configurations. Stability and power quality evaluations were conducted through MATLAB/Simulink simulations and experimental validation. Test results show that the genset-master configuration produces stable synchronization (220V/50Hz), while the inverter-master configuration experiences initial voltage instability. However, by optimizing the power capacity ratio between the master and slave units to 10:1 and implementing a properly designed PWM modulation, the system successfully achieves stable operation. An IoT-based monitoring system using ESP32 and PZEM-004T sensors provides real-time data to validate these findings, confirming that while the inverter-based master configuration is feasible, precise design parameters are required to ensure reliable synchronization
Analisis Troubleshooting External Leak Pada Komponen Differential Komatsu HD785-7 (Studi Kasus: PT BUMA BRC) Yudi Kurniawan; Ali Abrar; Subur Mulyanto; Rian Suryadi; Agung Dwi Nugroho; Dini Oktavitasari; Musrinah Musrinah
JURNAL ALAT BERAT Vol 3 No 1 (2026): Januari 2026
Publisher : Politeknik Negeri Balikpapan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32487/jab.v3i1.45

Abstract

Penelitian ini berjudul “Analisis External Leak pada komponen Differential HD785-7 di PT BUMA (BRC)”, yang bertujuan untuk mengetahui penyebab terjadinya external leak pada komponen differential Komatsu HD785-7 dan mengetahui tindakan yang tepat untuk mencegah terjadinya external leak. Metode analisis yang digunakan meliputi analisis visual, analisis trend, dimension inspection, dan perbandingan dengan standard pabrik. Berdasarkan hasil analisis trend, terjadi 14 kali kejadian kebocoran eksternal pada differential diseluruh job site PT BUMA. Hasil analisis visual, ditemukan kebocoran pada seal oil. Hasil dimension inspection pada komponen coupling differential, ditemukan bahwa coupling mengalami keausan di bagian sisi distance coupling dan tidak terdapat pengukuran dimensi coupling terhadap ukuran standard dari pabrik di QA sheet BRC. Dari penelitian ini menunjukkan bahwa penyebab terjadinya external leak, karena keausan dari bagian coupling differential yang diakibatkan pemakaian berulang /part reuse yang dilakukan secara berkelanjutan.
Co-Authors Agoeng Harjatmo Rahardjo Agung Dwi Nugroho Ali Abrar Andy Maulana Yusuf Dini Oktavitasari Ignatius Riyadi Mardiyanto Rian Suryadi Ridwan Nurdin SRI PARYANTO MURSYID SRI UTAMI Subur Mulyanto Tjatur Udjianto WILDAN ARASSID Yudi Kurniawan