Lusiana Efrizoni
Department of Informatics Engineering, Universitas Sains dan Teknologi Indonesia, Pekanbaru 28299, Indonesia

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Implementation of U-Net as EfficientNet encoder for brain tumour type classification Rahma Aulia; Junadhi Junadhi; Lusiana Efrizoni; Rini Yanti
Science, Technology, and Communication Journal Vol. 6 No. 3 (2026): SINTECHCOM Journal (June 2026)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i3.387

Abstract

Brain tumor is one of the most dangerous diseases that requires fast and accurate diagnosis to support patient diagnose. The application of deep learning on magnetic resonance imaging (MRI) images has been widely used to assist automatic brain tumor classification. This study aims to implement a hybrid U-Net encoder-EfficientNet architecture for brain tumor classification using MRI images. In this study, the U-Net encoder was utilized to extract spatial features and generate an attention mask to highlight important regions before the classification process was performed by EfficientNet-B0. The dataset used was BRISC 2025, consisting of 6,000 MRI images divided into four classes: glioma, meningioma, pituitary, and no tumor. The experiments were conducted using three data splitting scenarios, namely 60:20:20, 70:15:15, and 80:10:10. The results showed that the proposed model achieved good classification performance across all testing scenarios. In the 60:20:20 scenario, the model achieved an accuracy of 82%, precision of 0.83, recall of 0.82, and F1-score of 0.81. In the 70:15:15 scenario, the model achieved an accuracy of 84%, precision of 0.85, recall of 0.84, and F1-score of 0.83. Meanwhile, the 80:10:10 scenario produced the best performance with an accuracy of 85%, precision of 0.86, recall of 0.85, and F1-score of 0.84. These results indicate that the use of the U-Net encoder was able to help the model focus on tumor regions, thereby improving the effectiveness of the classification process.
Nutri-score classification of snack products using word embedding and random forest Onky Wanda Darmawan; Junadhi Junadhi; Lusiana Efrizoni; Nurjayadi Nurjayadi
Science, Technology, and Communication Journal Vol. 6 No. 3 (2026): SINTECHCOM Journal (June 2026)
Publisher : Lembaga Studi Pendidikan dan Rekayasa Alam Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59190/stc.v6i3.393

Abstract

The increasing consumption of packaged snack products has raised concerns regarding their nutritional quality and potential health impacts. Although nutritional information is commonly provided on food packaging, many consumers experience difficulties in interpreting ingredient descriptions and nutritional labels, making it challenging to identify whether a product is healthy or unhealthy. Therefore, an automated classification system is needed to assist consumers in understanding nutritional information more effectively. This study proposes a text-based classification framework for categorizing snack products into healthy and unhealthy classes using Natural Language Processing (NLP), word embedding techniques, and the Random Forest algorithm. The dataset was obtained from the Open Food Facts database and filtered to include snack products only. After preprocessing and class balancing, a total of 465 samples were used for model development and evaluation. The preprocessing stage consisted of case folding, tokenization, stopword removal, and stemming. Three word embedding techniques, namely Word2Vec, GloVe, and FastText, were employed to transform textual ingredient descriptions into numerical feature representations. Subsequently, Random Forest was utilized as the classification algorithm, and its performance was evaluated using Accuracy, Balanced Accuracy, Precision, Recall, F1-score, and Macro F1-score. The experimental results show that GloVe achieved the best performance among the evaluated embedding methods, obtaining an accuracy of 86.02%, balanced accuracy of 84.72%, precision of 85.98%, recall of 86.02%, F1-score of 85.91%, and macro F1-score of 85.19%. The findings indicate that GloVe provides a more effective semantic representation of food-related textual information compared to Word2Vec and FastText. Overall, the proposed framework demonstrates the potential of NLP-based approaches for automated nutritional assessment and healthy food classification.