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All Journal JUTIK : Jurnal Teknologi Informasi dan Komputer Jurnal Informatika dan Rekayasa Komputer
Ayu Amelia Pertiwi
Universitas Negeri Medan
Computer Science & IT Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Social Sciences

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PREDIKSI PENJUALAN ONLINE MENGGUNAKAN RIDGE REGRESSION BERBASIS DATA HISTORIS Ayu Amelia Pertiwi; Sarah Putri Syaifullah Nasution; Arnita; Fanny Ramadhani
Jurnal Teknologi Informasi dan Komputer Vol. 12 No. 2 (2026): JUTIK : Jurnal Teknologi Informasi dan Komputer, Edisi Oktober 2026
Publisher : LPPM Universitas Dhyana Pura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36002/jutik.v12i2.4015

Abstract

The development of digital technology has increased online purchases, changed consumption patterns, and created a need for accurate sales predictions for strategic decision-making. However, prediction accuracy is often hindered by multicollinearity issues among numeric features and the risk of overfitting in conventional linear regression models. This research aims to address these issues by applying Ridge Regression based on L2 regularization to predict total sales using historical e-commerce data. The methods used include data collection (541,909 records), preprocessing (removal of outliers and missing values), and modeling with scikit-learn, evaluated using MAE (73.25), RMSE (129.80), and the coefficient of determination (R²). The results indicate that the model is capable of predicting total sales with adequate accuracy even though there are deviations in extreme value transactions. Practically, the implementation of Ridge Regression has proven effective in reducing overfitting and enhancing prediction stability, making it a reference in inventory planning and marketing strategies. This finding reinforces the need for adaptive machine learning approaches in sales data analysis in the digital era.
Implementasi Sistem Logging Jaringan Berbasis Web untuk Monitoring dan Analisis Real-Time: Integration of Telegram OTP Authentication for Access Security and Attack Analysis Ayu Amelia Pertiwi; Dedy Kiswanto Kiswanto; Sarah Putri Syaifullah Nst; Muhammad Raffi Akbar Tjg
Jurnal Informatika Dan Rekayasa Komputer(JAKAKOM) Vol 6 No 1 (2026): JAKAKOM Vol 6 No 1 APRIL 2026
Publisher : LPPM Universitas Dinamika Bangsa

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33998/jakakom.2026.6.1.2639

Abstract

Network security is a crucial aspect of modern information systems operating online. Unmonitored network activity can lead to vulnerabilities and cyber-attacks such as SQL Injection, Brute Force, and Cross-Site Scripting (XSS). This study aims to implement a web-based network logging system capable of real-time monitoring and threat analysis. The system adopts a client-server architecture with a web interface displaying network activity logs, threat levels, and security status through an interactive dashboard. Core features include attack detection, threat scoring, and OTP authentication via Telegram bot. Testing results show a detection accuracy of 92% and an average OTP delivery time of 1.3 seconds. The proposed system enhances efficiency and responsiveness in real-time network monitoring.
Co-Authors Arnita Dedy Kiswanto Kiswanto Muhammad Raffi Akbar Tjg Ramadhani, Fanny Sarah Putri Syaifullah Nasution Sarah Putri Syaifullah Nst