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All Journal Malcom: Indonesian Journal of Machine Learning and Computer Science PREDATECS: Public Research Journal of Engineering, Data Technology and Computer Science
Syarif, Yulia
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Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Engineering

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Implementation of Gated Recurrent Unit, Long Short-Term Memory and Derivatives for Gold Price Prediction Putri, Amanda Iksanul; Syarif, Yulia; Aisyi, Nasywa Rihadatul; Waeyusoh, Nuralisa
Public Research Journal of Engineering, Data Technology and Computer Science Vol. 2 No. 2: PREDATECS January 2025
Publisher : Institute of Research and Publication Indonesia (IRPI).

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/predatecs.v2i2.1609

Abstract

Gold is a precious metal with high resale value, often considered a safe investment as its price typically rises with inflation, attracting investors. However, even slight changes in gold prices can have significant impacts. To build an accurate forecasting model, this study applies and compares Gated Recurrent Unit (GRU), Bidirectional Gated Recurrent Unit (Bi-GRU), Long Short-Term Memory (LSTM), and Bidirectional Long Short-Term Memory (Bi-LSTM) algorithms on global gold prices. GRU and LSTM are recurrent neural networks designed to capture patterns in sequential data, where GRU uses a simplified gating mechanism to retain essential information, and LSTM, with its more complex gates, helps manage long-term dependencies in data. Bi-GRU and Bi-LSTM process data bidirectionally, capturing context from both past and future sequences for better prediction accuracy. This research uses data from Yahoo Finance (01-01-2014 to 12-06-2024) and experiments with optimization techniques (Adam, AdamW, Adamax, and Nadam), batch sizes (8, 16, and 32), time steps (10, 20, and 30), and a learning rate of 0.0001, trained for 1000 epochs with checkpoints and early stopping. Bi-GRU with Nadam, batch size 8, and 20 time steps proved most effective, with MSE of 4.1153, RMSE of 2.0286, MAE of 1.5881, and MAPE of 0.8857%. Forecasts using this model predict a 20-day decline in gold prices.
Implementasi Algoritma Decision Tree dan Support Vector Machine (SVM) untuk Prediksi Risiko Stunting pada Keluarga: Implementation of Decision Tree and Support Vector Machine (SVM) Algorithm for Stunting Risk Prediction Putri, Amanda Iksanul; Syarif, Yulia; Jayadi, Puguh; Arrazak, Fadlan; Salisah, Febi Nur
MALCOM: Indonesian Journal of Machine Learning and Computer Science Vol. 3 No. 2 (2023): MALCOM October 2023
Publisher : Institut Riset dan Publikasi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.57152/malcom.v3i2.1228

Abstract

Kondisi kekurangan gizi kronis yang disebabkan oleh asupan makanan yang tidak mencukupi sebagai akibat dari kebiasaan makan yang tidak tepat sesuai dengan gizi yang diperlukan disebut juga dengan stunting. Stunting dapat membuat fisik anak menjadi lebih pendek, selain itu dapat menghambat pertumbuhan dan perkembangan organ lain seperti ginjal, jantung, dan otak pada anak. Meningkatnya kasus stunting pada anak memerlukan upaya pencegahan secara dini. Pada penelitian ini menggunakan 18 atribut dan 5021 record data dari 10 kelurahan Kota Dumai dimana salah satu diantaranya dijadikan sebagai kelas. Pada penelitian ini menerapkan Algoritma Decision Tree dan Support Vactor Machine (SVM) untuk mengetahui algoritma mana yang tepat memproses data tersebut. Hasil prediksi dengan menggunakan Decision Tree pada penelitian ini mendapatkan nilai akurasi sebesar 96.15%, nilai recall Tidak sebesar  92.06% serta Ya sebesar 97.34% dan nilai presisi Tidak sebesar 90.99% serta Ya sebesar 97.68%. Sedangkan dengan menggunakan Algoritma SVM mendapatkan nilai akurasi sebesar 62.48%, nilai recall Tidak sebesar 99.12% serta Ya sebesar 51.80% dan nilai presisi Tidak sebesar 37.49% serta Ya sebesar 99.51%. Berdasarkan penelitian menggunakan data  tersebut dapat disimpulkan bahwa akurasai algoritma Decision Tree jauh lebih baik dibandingkan dengan algoritma SVM.
Co-Authors Aisyi, Nasywa Rihadatul Arrazak, Fadlan Febi Nur Salisah, Febi Nur Jayadi, Puguh Putri, Amanda Iksanul Waeyusoh, Nuralisa