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All Journal Jurnal Algoritma GEMBIRA (Pengabdian Kepada Masyarakat)
Ilman Firmansa
Universitas Annuqayah
Religion Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Education Law, Crime, Criminology & Criminal Justice Social Sciences

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Deteksi Anomali Peminjaman Buku Menggunakan Algoritma Isolation Forest untuk Meningkatkan Efisiensi Layanan Miftahul Arifin; Rizal Sapta Dwi Harjo; Ilman Firmansa; Muhammad Faizal Ilham
Jurnal Algoritma Vol 23 No 1 (2026): Jurnal Algoritma
Publisher : Institut Teknologi Garut

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33364/algoritma/v.23-1.3117

Abstract

University libraries require systems capable of detecting abnormal book borrowing behavior to maintain service effectiveness. Without an anomaly detection mechanism, libraries are prone to various operational issues, such as increased manual verification workload for librarians, delays in identifying problematic borrowings, and discrepancies in book inventory records. Based on preliminary data prior to this study, an average of 8–12% of transactions exhibited irregularities, such as extreme delays, borrowings outside operational hours, or unusually large numbers of books borrowed in a single transaction. This condition highlights the need for an analytical approach that can provide faster and more consistent detection than manual inspection. This study applies the Isolation Forest algorithm to detect anomalies in the book borrowing dataset of the Wiraraja University Library. The borrowing data are processed through data cleaning, feature extraction, and standardization before being used for model training. The results show that the model achieves an accuracy of 90% in identifying normal borrowing patterns and successfully detects transactions with extreme characteristics as anomalies. These findings confirm that a machine learning–based approach can improve library operational efficiency while minimizing the risk of abnormal transactions that were previously difficult to detect through manual processes.
PELATIHAN LITERASI NUMERIK AL-QUR'AN UNTUK MENINGKATKAN MOTIVASI MENGHAFAL SANTRI DI TPQ AL ISLAM KORI NUANSA UNGASAN BALI Adika Setia Brata; Windy Lestari; Suci Rahmawati; Azizah Aziz; Ilman Firmansa
Jurnal Gembira: Pengabdian Kepada Masyarakat Vol 4 No 03 (2026): JUNI 2026
Publisher : Media Inovasi Pendidikan dan Publikasi

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Abstract

Literasi numerik dalam konteks pendidikan agama sering kali belum tergarap optimal, padahal pemahaman pola angka dalam Al-Qur'an dapat menjadi stimulus kognitif yang menarik bagi santri. Kegiatan pengabdian masyarakat ini bertujuan untuk memberikan Pelatihan Literasi Numerik Al-Qur'an guna meningkatkan motivasi menghafal santri di TPQ Al Islam Kori Nuansa Ungasan, Bali. Metode yang digunakan adalah metode pendampingan partisipatif yang meliputi sosialisasi, workshop interaktif mengenai keajaiban angka, serta pendampingan teknik menghafal melalui media Visual Number Mapping. Hasil kegiatan menunjukkan adanya peningkatan signifikan pada pemahaman literasi numerik santri, dengan kenaikan skor rata-rata dari 45,5 menjadi 82,0 (N-Gain 0,67). Selain itu, observasi lapangan menunjukkan peningkatan antusiasme dan motivasi santri yang terlihat dari kenaikan setoran hafalan harian dari 3 baris menjadi 7 baris per hari. Pelatihan ini membuktikan bahwa pengintegrasian konsep numerik sederhana dapat menjadi pendekatan alternatif yang efektif dan transformatif dalam pembelajaran di lingkungan TPQ.  
Co-Authors Adika Setia Brata Azizah Aziz Miftahul Arifin Muhammad Faizal Ilham Rizal Sapta Dwi Harjo Suci Rahmawati Windy Lestari