Acta Informatica Pragensia - Forthcoming articles
Similarity Ranking-Based Instance Selection for Enhancing k-NN Classification Performances
Abdul Muqtasid bin Rushdi, Mohammad bin Hossin, Suhaila binti Saee, Norita binti Md Norwawi
Acta Informatica Pragensia X:X | DOI: 10.18267/j.aip.310207 
Background: The k-nearest neighbours (k-NN) is a well-established classifier in machine learning. Yet, its performance drops and computational costs rise with extensive or redundant datasets. Furthermore, current instance selection (IS) approaches often face scalability problems and are sensitive to parameter settings.Objective: This study seeks to design a straightforward and efficient IS algorithm that reduces both dataset size and computational demands, yet preserves or enhances the accuracy of k-NN classification.Methods: We propose Euclidean ranking-based instance selection (ERbIS), a novel IS approach that prioritises samples based on their Euclidean...
Blockchain Applications and Governance Implications in the Public Sector: A Literature Review
Linda Nuryanti, Fara Ayuningtyas, Monica Dwi Wahyu Sumunaringrum, Wenwen Ruswendi, Agoeng Srimoeljanto, Agus Sutejo, Triyono Susanto, Ratna Nurmayni
Acta Informatica Pragensia X:X | DOI: 10.18267/j.aip.315179
Background: Blockchain is increasingly recognized as a transformative enabler of e-governance, offering capabilities to enhance transparency, efficiency, security, and citizen trust in public-sector administration. However, widespread adoption remains constrained by persistent technical, regulatory, and socio-institutional challenges, particularly the absence of coherent governance frameworks across jurisdictions.Objective: This study aims to systematically map the evolution of blockchain applications in e-governance, identify dominant research themes and collaboration patterns, and highlight governance-related challenges that inform future policy...