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All Journal Sinkron : Jurnal dan Penelitian Teknik Informatika JOURNAL OF APPLIED INFORMATICS AND COMPUTING Jutisi: Jurnal Ilmiah Teknik Informatika dan Sistem Informasi Jurnal Computer and Technology Jurnal Ilmiah Teknologi Informatika
Zulpan Hadi
Universitas Teknologi Mataram
Computer Science & IT Other

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Journal : jurnal computer and technology

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CYBER BULLYING SENTIMENT ANALYSIS BASED ON SOCIAL CATEGORIES USING THE CHI-SQUARE TEST Hadi, Zulpan; Suryadi, Emi; Akbar, Ardiyallah; Zaenudin; Muslim, Rudi
Journal Computer and Technology Vol. 2 No. 1 (2024): Juli 2024
Publisher : Ninety Media Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69916/comtechno.v2i1.144

Abstract

This research evaluates various machine learning models in classifying sentiment in cyberbullying data across six categories: not_cyberbullying, gender, religion, other_cyberbullying, age, and ethnicity. Using a Bag of Words approach combined with Chi-Square feature selection (1000 features), models tested include SVM, Logistic Regression, Naïve Bayes, KNN, and Random Forest. Results show SVM and Logistic Regression achieving the highest accuracy at 83%, indicating their effectiveness in prediction. Naïve Bayes performed the poorest with 62% accuracy, suggesting a mismatch with the data or need for further tuning. KNN and Random Forest showed good performance with 75% and 81% accuracy respectively, though not as high as SVM and Logistic Regression. This multi-algorithm approach provides insights into each model's effectiveness and behavior on diverse data characteristics, essential for understanding the unique nuances of each cyberbullying category. Model selection should consider accuracy, interpretability, computational cost, and suitability to specific problem characteristics. This research aims to deepen understanding of cyberbullying to support more effective mitigation strategies.
FAKE REVIEW DETECTION ON DIGITAL PLATFORMS USING THE ROBERTA MODEL: A DEEP LEARNING AND NLP APPROACH Hadi, Zulpan; Nurkholis, Lalu Moh.; Imran, Bahtiar; Riadi, Selamet; Suryadi, Emi
Journal Computer and Technology Vol. 3 No. 1 (2025): Juli 2025
Publisher : Ninety Media Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69916/comtechno.v3i1.355

Abstract

Fake reviews have emerged as a serious threat to the integrity of digital platforms, particularly in e-commerce and online review sites. This study explores the application of RoBERTa (Robustly Optimized BERT Approach), a transformer-based architecture optimized for natural language processing (NLP), in automatically detecting fake reviews. The methodology includes data collection from online platforms, contextual feature extraction using RoBERTa embeddings, model training through supervised learning, and evaluation using classification metrics such as accuracy, precision, recall, and F1-score. The training results indicate a significant convergence trend in the training loss, while the validation loss remains relatively unstable, reflecting challenges in model generalization. Nevertheless, experimental results demonstrate that RoBERTa outperforms other approaches such as Logistic Regression PU, K-NN with EM, and LDA-BPTextCNN, achieving an accuracy of 86.25%. These findings highlight RoBERTa's strong potential in detecting manipulative content and underscore its value as an essential tool in building a transparent and trustworthy digital ecosystem.
KLASIFIKASI PENYAKIT TANAMAN TEMBAKAU MENGGUNAKAN ALGORITMA CONVOLUTIONAL NEURAL NETWORK (CNN) BERBASIS WEB Baiq Norma Alyanesti Abella; Muhammad Multazam; Hadi, Zulpan; Muahidin, Zumratul
Journal Computer and Technology Vol. 3 No. 2 (2025): Desember 2025
Publisher : Ninety Media Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.69916/comtechno.v3i2.383

Abstract

Tanaman tembakau merupakan salah satu komoditas pertanian yang signifikan dan memiliki nilai ekonomi yang tinggi. Namun, produktivitas tanaman ini seringkali mengalami penurunan akibat serangan berbagai jenis penyakit pada daun yang sulit dikenali secara langsung oleh para petani. Untuk mengatasi permasalahan tersebut, penelitian ini mengembangkan sebuah sistem klasifikasi penyakit pada tanaman tembakau yang berbasis website, dengan memanfaatkan algoritma Convolutional Neural Network (CNN). Sistem ini dirancang untuk mengklasifikasikan penyakit tersebut. citra daun tembakau ke dalam tiga kategori, yaitu Alternia Alternata, Cescospora Necotianae, dan daun sehat (tidak terinfeksi). Model CNN dilatih menggunakan dataset citra daun tembakau yang telah diberi labeb sesuai jenis penyakitnya. Selain memberikan hasil klasifikasi, sistem ini juga menyajikan deskripsi penyakit, tingkat akurasi prediksi, saran penanganan, serta menyimpan riwayat diagnosa ke dalam database. Dengan adanya sistem ini, diharapkan petani dapat memperoleh informasi diagnosis penyakit secara cepat, akurat, dan mudah diakses melalui perangkat digital.
Co-Authors Abda Abda Ahsan, Muhammad Salimy Akbar, Ardiyallah Arwidiyarti, Dwinita Asrory, Akmaludin Baiq Norma Alyanesti Abella DHANI ARIATMANTO Ema Utami Imran, Bahtiar Kurni, Samuel Everth Andrias KUSRINI Muahidin, Zumratul Nurkholis, Lalu Moh. Nurwijayanti Pratiwi Rudi Muslim Selamet Riadi Suryadi, Emi Wahyudi, Muhammad Syahrul Zaenudin Zaenudin ., Zaenudin Zulpahmi, M.