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All Journal Semantik Techno.Com: Jurnal Teknologi Informasi Prosiding SNATIF Jurnal Transformatika Jurnal Edukasi dan Penelitian Informatika (JEPIN) Scientific Journal of Informatics Seminar Nasional Informatika (SEMNASIF) Jurnas Nasional Teknologi dan Sistem Informasi Journal of Information System Sinkron : Jurnal dan Penelitian Teknik Informatika Journal of Information Technology and Computer Science Jurnal Pilar Nusa Mandiri Kinetik: Game Technology, Information System, Computer Network, Computing, Electronics, and Control IKRA-ITH Informatika : Jurnal Komputer dan Informatika JOURNAL OF APPLIED INFORMATICS AND COMPUTING Building of Informatics, Technology and Science Journal of Electronics, Electromedical Engineering, and Medical Informatics Abdimasku : Jurnal Pengabdian Masyarakat Jurnal Sistem Komputer dan Informatika (JSON) Jurnal Pengabdian Literasi Digital Indonesia Indonesian Journal of Health Information Management Services (IJHIMS) Community: Jurnal Pengabdian Pada Masyarakat Prosiding Seminar Riset Mahasiswa
Fahmi Amiq
Fakultas Ilmu Komputer, Universitas Dian Nuswantoro, Semarang 50131
Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Health Professions Industrial & Manufacturing Engineering Languange, Linguistic, Communication & Media Public Health Social Sciences Other

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Journal : Jurnal Sistem Komputer dan Informatika (JSON)

 1 
Implementation of DBSCAN Algorithm for Grouping Poverty Levels in Central Java Province Fahmi, Amiq; Tsani, Maulida Aristia
Jurnal Sistem Komputer dan Informatika (JSON) Vol 6, No 4 (2025): Juni 2025
Publisher : Universitas Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30865/json.v6i4.8553

Abstract

Poverty is a complex problem that hampers socio-economic development in Indonesia, especially in Central Java Province, which encounters significant challenges, with a poverty rate reaching 10.77% in 2023. This study aims to identify spatial patterns of poverty in 35 districts/cities in Central Java Province by grouping areas based on the number of poor individuals reported by the Central Java Province Statistics Agency (BPS) in 2023. The Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm groups districts/cities based on poverty data density with optimized parameters to produce statistically significant clusters. The results of the analysis reveal four clusters, specifically cluster 0 (moderate poverty), cluster 1 (high poverty), cluster 2 (very high poverty), and cluster 3 (low poverty). Model validation was executed using the Silhouette Score (0.447) and Davies-Bouldin Index (0.441), which showed the validity of the clustering. This study is anticipated to provide strategic implications for the Central Java Provincial Government in formulating more effective poverty alleviation policies, such as resource allocation adjusted to each cluster's characteristics. In addition, this study enables future exploration of additional socio-economic factors influencing poverty, such as the Human Development Index, education, health, infrastructure, resource accessibility, and comparative analysis of clustering algorithms for enhanced accuracy.
Implementation of DBSCAN Algorithm for Grouping Poverty Levels in Central Java Province Fahmi, Amiq; Tsani, Maulida Aristia
Jurnal Sistem Komputer dan Informatika (JSON) Vol. 6 No. 4 (2025): Juni 2025
Publisher : Universitas Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30865/json.v6i4.8553

Abstract

Poverty is a complex problem that hampers socio-economic development in Indonesia, especially in Central Java Province, which encounters significant challenges, with a poverty rate reaching 10.77% in 2023. This study aims to identify spatial patterns of poverty in 35 districts/cities in Central Java Province by grouping areas based on the number of poor individuals reported by the Central Java Province Statistics Agency (BPS) in 2023. The Density-Based Spatial Clustering of Applications with Noise (DBSCAN) algorithm groups districts/cities based on poverty data density with optimized parameters to produce statistically significant clusters. The results of the analysis reveal four clusters, specifically cluster 0 (moderate poverty), cluster 1 (high poverty), cluster 2 (very high poverty), and cluster 3 (low poverty). Model validation was executed using the Silhouette Score (0.447) and Davies-Bouldin Index (0.441), which showed the validity of the clustering. This study is anticipated to provide strategic implications for the Central Java Provincial Government in formulating more effective poverty alleviation policies, such as resource allocation adjusted to each cluster's characteristics. In addition, this study enables future exploration of additional socio-economic factors influencing poverty, such as the Human Development Index, education, health, infrastructure, resource accessibility, and comparative analysis of clustering algorithms for enhanced accuracy.
Identifikasi Faktor Risiko Serangan Jantung di Indonesia Menggunakan Model Prediktif LightGBM Fahmi, Amiq; Muhammad Fais Ramadhani; Ramadhan Rakhmat Sani
Jurnal Sistem Komputer dan Informatika (JSON) Vol. 7 No. 2 (2025): Desember 2025
Publisher : Universitas Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30865/json.v7i2.9065

Abstract

Peningkatan prevalensi serangan jantung di Indonesia telah menjadi isu kesehatan publik yang signifikan karena penyakit ini konsisten termasuk penyebab kematian tertinggi secara nasional. Meskipun berbagai studi epidemiologis telah mengidentifikasi faktor risiko klinis maupun perilaku, pendekatan berbasis data untuk prediksi individual masih relatif terbatas, terutama pada konteks populasi Indonesia dengan karakteristik heterogen. Untuk menjawab kesenjangan tersebut, penelitian ini mengembangkan model prediktif serangan jantung menggunakan algoritma Light Gradient Boosting Machine (LightGBM) yang dikenal efisien pada data berukuran besar. Dataset terdiri dari 158.355 observasi dan 28 fitur demografis, gaya hidup, dan indikator medis. Prosedur prapemrosesan mencakup imputasi nilai hilang, pengkodean variabel kategorikal, seleksi fitur menggunakan Principal Component Analysis (PCA), serta penyeimbangan distribusi kelas melalui Synthetic Minority Over-Sampling Technique (SMOTE). Kinerja prediksi dievaluasi menggunakan metrik klasifikasi standar, di mana LightGBM mencapai akurasi 83,39% (train) dan 77,92% (test); presisi 85,67% dan 79,38%; recall 80,19% dan 75,44%; F1-score 82,84% dan 77,36%; serta AUC-ROC 91,84% dan 87,37%. Analisis komponen utama menunjukkan kontribusi varians yang tinggi pada fitur terkait pola konsumsi, penggunaan obat, stres, dan hipertensi. Hasil ini mengindikasikan bahwa LightGBM merupakan pendekatan yang menjanjikan untuk mendukung deteksi risiko serangan jantung secara lebih awal dan berpotensi meningkatkan strategi mitigasi penyakit kardiovaskular di Indonesia.
Evaluasi Komparatif Model Regresi Prediksi Saham BBCA dengan Analitik dan Visualisasi Interaktif Menggunakan Streamlit Fahmi, Amiq; Muhammad Hilmy Munsarif; Agus Winarno
Jurnal Sistem Komputer dan Informatika (JSON) Vol. 7 No. 2 (2025): Desember 2025
Publisher : Universitas Budi Darma

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30865/json.v7i2.9119

Abstract

Ketidakstabilan harga saham yang dipengaruhi oleh faktor fundamental dan teknikal menimbulkan kompleksitas dalam proses prediksi serta menuntut model yang akurat dan mampu melakukan generalisasi. Penelitian sebelumnya masih berfokus pada regresi linier konvensional tanpa membandingkannya dengan metode regularisasi maupun menelaah kontribusi rekayasa fitur dalam meningkatkan performa prediktif. Kontribusi penelitian ini adalah mengevaluasi dan membandingkan efektivitas Regresi Linier, Ridge Regression, dan Lasso Regression dalam memprediksi harga penutupan saham PT Bank Central Asia Tbk (BBCA). Kebaruan penelitian ini terletak pada penerapan tahapan preprocessing dan feature engineering yang menghasilkan tujuh variabel turunan, yaitu daily range, open–close change, daily return, lag features, moving average, volatility, dan transformasi logaritmik. Evaluasi model menggunakan Root Mean Squared Error (RMSE), Mean Absolute Error (MAE), dan koefisien determinasi (R²). Hasil utama menunjukkan bahwa Regresi Linier memiliki akurasi tinggi pada data pelatihan namun mengalami overfitting pada data uji, Ridge Regression tidak memberikan peningkatan stabilitas yang berarti, sedangkan Lasso Regression menjadi model paling stabil dengan nilai R² sebesar 0,8247. Temuan ini memberikan manfaat berupa dasar pemilihan metode prediksi yang lebih stabil dan akurat untuk digunakan dalam analisis harga saham dengan volatilitas tinggi.
Co-Authors -, Suhariyanto Abdul Rohim, Abdul Abu Salam Agus Winarno Agus Winarno Agus Winarno, Agus Al zami, Farrikh Alif , Moh. Fachri Alif, Moh. Fachri Alzami, Farrikh Apriyanti Apriyanti Ardianda Aryo Prakoso Ariel Bagus Nugroho Asih Rohmani, Asih Astuti, Yani Parti Budi Harjo Budiono Budiono Candra Irawan Catur Supriyanto Ciputra, Indramawan Diana Purwitasari Edi Faisal Edi Sugiarto Edi Sugiarto Edi Sugiarto Edi Sugiarto Edi Sugiarto Edi Sugiarto Egia Rosi Subhiyakto, Egia Rosi Erlin Dolphina Etika Kartikadarma Fhaldian, Wahyu Fikri Budiman Hadi, Heru Pramono Harun Al Azies Hindarto, Aris Nur Husna, Farida Amila Indra Gamayanto ISWAHYUDI ISWAHYUDI Izzatil Ismah, Nabila Karis Widyatmoko Kurnia Desita, Raafi Lalang Erawan Laurensius Tokan, Geraldinho Lintang Mekar Tanjung Maurensa, Giacinta Mauridhi Hery Purnomo Megantara, Rama Aria Moch. Eko Rustiyono Muhammad Fais Ramadhani Muhammad Hilmy Munsarif Muhammad Naufal, Muhammad Mulyanto, Edy Muslih Muslih MY. Teguh Sulistyono Nova Rijati Novi Hendriyanto, Novi Prasetya, Rakan Shafy Pujiono Pujiono Pujiono Pujiono Pujiono Putra, Wahyu Bagus Wicaksono Ramadhan Rakhmat Sani Respati Wulandari Ridha Rahmawati Ridho Pambudi Rizky Adrianto Salsabila, Rizka Mars Sasono Wibowo Sidharta, Bayu Adjie Sihombing, Drigo Alexander Sri Winarno Sudibyo, Usman Suharnawi Suharnawi Suryo Adi Nugroho Tacharri, Chusnuut Tsani, Maulida Aristia Utomo, Danang Wahyu Wibowo, Syifa Sofia Yumna Huwaida, Imtiyaz Yuventius Tyas Catur Pramudi Zaenal Arifin Zahro, Azzula Cerliana