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Bilal Sardar

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#explainable ai Open access Sep 2026

Privacy-aware adversarial defense with explainable AI for adversarial robustness in AI model

The Attention Concentration Score (ACS) is introduced, which measures how DP training shifts Transformer attention away from task-critical features toward non-functional ones, providing a mechanistic explanation of the trade-off.

Bilal Sardar, Shareeful Islam, Stefano Silvestri et al. · 0 citations
Open access Aug 2026

From Principles to Practice: Engineering Responsible AI for Geospatial Intelligence

AI-enabled geospatial applications increasingly inform high-stakes decisions in crop type classification, flood risk assessment, and land use monitoring; yet current practice prioritises predictive accuracy whilst leaving responsible AI (R-AI) largely unaddressed. This work aims to operationalise R-AI practice for geospatial AI by proposing a conceptual view and a four-phase methodology that embeds four distinct R-AI characteristics into the model development lifecycle. A conceptual R-AI view is proposed that situates four characteristics - Privacy, Fairness, Transparency, and Explainability - across three operational levels: data, model, and prediction. A four-phase methodology operationalises each through concrete techniques and quantifiable acceptance criteria. The threshold values and phase ordering of the methodology are governed by the proposed Pareto-Adaptive R-AI Compliance (PARC) algorithm, which derives dataset-specific thresholds and characterises the interactions between the four characteristics. Evaluation is conducted through two experiments using the Temporal-Spatial Vision Transformer (TSViT): crop type classification on the publicly available PASTIS/EuroCrops benchmark, and urban flood risk classification on a real-world UK Sustainable Drainage Systems (SuDS) pilot with six fused geospatial data sources. Across both experiments, all twelve R-AI acceptance criteria are satisfied. Privacy protection reduces membership inference attack accuracy from 0.712 to 0.503, approaching the random-guess baseline. Fairness interventions narrow the geographic performance gap from 23.1% to 3.1%. Transparency verification reduces physically inconsistent model behaviour from 24.1% to 3.8%. Explainability mechanisms improve temporal attribution consistency from 0.41 to 0.857, and the attribution methods are independently validated through deletion, insertion, and perturbation-stability analyses. All four characteristics are achieved whilst retaining over 97% of baseline predictive utility. These findings demonstrate that responsible AI and predictive accuracy are compatible objectives in geospatial deep learning. The proposed approach offers a replicable and measurable pathway for embedding R-AI practice into geospatial AI development, validated across two structurally distinct real-world tasks.

M. Hassan, Bilal Sardar, Shareeful Islam et al. · 0 citations

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