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Transformer Architectures for Automated Brain Stroke Screening from MRI Images Abstract Sukmana, Husni Teja; Hasibuan, Zainal Arifin; Rahman, Abdul Wahab Abdul; Bayuaji, Luhur; Masruroh, Siti Ummi
Journal of Applied Data Sciences Vol 6, No 2: MAY 2025
Publisher : Bright Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/jads.v6i2.736

Abstract

Early and accurate detection of stroke is critical for timely medical intervention and improved patient outcomes. This study explores the application of deep learning models, particularly the Vision Transformer (ViT), for the automated classification of brain stroke from medical images. A curated dataset of brain scans was used to train and evaluate the ViT model, which was benchmarked against a widely used convolutional neural network (CNN), ResNet18. Both models were trained using transfer learning techniques under identical preprocessing and training configurations to ensure fair comparison. The results indicate that the ViT model significantly outperforms ResNet18 in terms of validation accuracy, class-wise precision, and recall, achieving a peak accuracy of 99.60%. Visual analyses, including confusion matrices and sample prediction comparisons, reveal that ViT is more robust in detecting subtle stroke patterns. However, ViT requires more computational resources, which may limit its deployment in real-time or low-resource settings. These findings suggest that transformer-based architectures are highly effective for medical image classification tasks, particularly in stroke diagnosis, and offer a viable alternative to traditional CNN-based approaches.
Evaluating the Security of Electronic Medical Records in Indonesia’s SIMPUS Application Using the CIA Framework Durachman, Yusuf; Rahman, Abdul Wahab Abdul
International Journal of Informatics and Information Systems Vol 8, No 3: September 2025
Publisher : International Journal of Informatics and Information Systems

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/ijiis.v8i3.263

Abstract

Ensuring the security of electronic medical records (EMRs) is a critical challenge in the digital transformation of healthcare systems, particularly in developing countries. This study evaluates the security of Indonesia’s Community Health Center Information System (SIMPUS) based on the principles of confidentiality, integrity, and availability (CIA). A qualitative descriptive approach was employed, combining interviews and direct observation of SIMPUS implementation across multiple user roles. The findings reveal that while confidentiality is supported through user authentication, vulnerabilities remain due to shared account usage and the absence of automatic log-off features. Data integrity is maintained through restricted editing rights, but the lack of an audit trail limits the system’s ability to detect unauthorized changes. Data availability is generally sufficient; however, reliance on manual backup processes exposes the system to potential data loss. The study highlights the need for enhanced audit mechanisms, automated backup solutions, and staff training to strengthen data security compliance with national regulations and international standards such as ISO 27001 and HIPAA. Strengthening these measures will help ensure that SIMPUS can function as a secure and reliable platform for managing electronic medical records in Indonesia’s primary healthcare system.
Blockchain and the Evolution of Decentralized Finance Navigating Growth and Vulnerabilities Durachman, Yusuf; Rahman, Abdul Wahab Abdul
Journal of Current Research in Blockchain Vol. 1 No. 3 (2024): Regular Issue December
Publisher : Bright Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/jcrb.v1i3.20

Abstract

Decentralized Finance (DeFi) is revolutionizing the way individuals and institutions engage with financial services by removing intermediaries and offering decentralized alternatives to traditional banking and finance systems. This paper explores the rapid growth and impact of DeFi on global financial systems, focusing on key protocols such as Uniswap, Aave, and Compound. Using both qualitative and quantitative methodologies, including case studies and comparative analyses, the research examines the evolution of DeFi in terms of Total Value Locked (TVL), transaction costs, security challenges, and user adoption. The findings reveal that DeFi platforms have experienced exponential growth in liquidity, with TVL across major protocols increasing from $50 million in January 2020 to over $100 billion by January 2024. Uniswap alone saw its TVL grow from $50 million to $15 billion during the same period. DeFi significantly reduces transaction costs, with cross-border fees averaging $7 on Uniswap, compared to $35 in traditional banks. However, Ethereum gas fees remain volatile, exceeding $50 during peak congestion periods. Despite these cost benefits, the study also identifies security as a major concern, with 22 significant security incidents reported in DeFi between 2020 and 2023, resulting in substantial financial losses. Additionally, the lack of clear regulatory frameworks continues to pose challenges to broader adoption. This research concludes that while DeFi has the potential to disrupt traditional financial systems, its long-term success depends on addressing these technical and regulatory challenges. The adoption of Layer-2 scaling solutions, along with improvements in security and regulatory clarity, will be essential for ensuring the continued growth and stability of the DeFi ecosystem.
Investigating the Impact of Gameplay Hours on Player Recommendations in Steam Games: A Comparative Analysis Using Logistic Regression and Random Forest Classifiers Durachman, Yusuf; Rahman, Abdul Wahab Abdul
International Journal Research on Metaverse Vol. 2 No. 1 (2025): Regular Issue March
Publisher : Bright Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47738/ijrm.v2i1.21

Abstract

The study delves into the complex relationship between gameplay hours and player recommendations on the Steam platform, leveraging both Logistic Regression and Random Forest classifiers to analyze the data. The findings underscore a strong correlation between hours played and the likelihood of recommending a game. Specifically, longer gameplay hours generally indicate higher engagement levels, which often translate into a greater propensity for players to recommend the game. However, this trend is not universally applicable; a subset of users with high playtime did not recommend their games, highlighting that engagement alone does not guarantee satisfaction. Factors such as game quality, unmet player expectations, and individual preferences may influence these outcomes. The Logistic Regression model provided a clear linear understanding of the data, demonstrating that hours played significantly affect recommendation likelihood. Its coefficients suggested a positive relationship, making it a useful tool for interpreting the odds of recommendation changes based on gameplay hours. Nonetheless, the model's limitations became evident in its inability to capture intricate, non-linear patterns within the data. In contrast, the Random Forest classifier excelled by capturing complex interactions and offering robust predictive accuracy. This model utilized ensemble learning to analyze various decision trees, thereby revealing more nuanced insights into player behaviors. Feature importance scores derived from Random Forest confirmed that hours played was a critical variable, but also highlighted the potential significance of other factors contributing to player recommendations. Model performance metrics further reinforced these observations. The Random Forest classifier outperformed Logistic Regression in terms of accuracy (82.65% compared to 81.26%), precision, recall, and the F1-score, while also delivering a higher Area Under the Curve (AUC-ROC), indicating superior discriminative power. These results suggest that Random Forest is more suitable for capturing the multifaceted dynamics of player engagement and recommendations. This comprehensive comparison illustrates how different modeling approaches can yield valuable, yet varying, insights into gaming data.