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M.Sc. Dissertation: Healthcare insurance fraud detection using Optuna-tuned ML ensemble (F1=0.7345) with SHA-256 blockchain audit trails and ECIES encryption. 5,410 providers, 190 features, SHAP/LIME explainability.
Updated
Apr 9, 2026
Python
3-stage NLP pipeline on 568k Amazon reviews — VADER baseline → TF-IDF + LinearSVC → DistilBERT fine-tuning. Adds Aspect-Based Sentiment Analysis (Quality/Price/Delivery/Service) and LIME explainability. Surfaces star-rating disconnects that predict return rates.
Updated
May 24, 2026
Jupyter Notebook
Multi-task RoBERTa for sarcasm detection via Sentiment Incongruence Auto-Labeling. Focal Loss + WeightedRandomSampler + LIME explainability. F1-Macro 0.977, AUC 0.997. Zero-shot cross-domain eval on ABSA & Amazon. IEEE paper.
Updated
Apr 22, 2026
Jupyter Notebook
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