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Author

Fatih Şahin

3 papers indexed here

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Open access Sep 2026

A Fair Evaluation of Lightweight CNNs and Ordinal Regression for Diabetic Retinopathy Grading: The Double-Rebalancing Pitfall

Diabetic retinopathy (DR) is a leading cause of preventable blindness worldwide, affecting approximately one-third of diabetic patients. Early detection through automated retinal screening systems can significantly reduce the burden of vision loss. In this study, we present a comparative analysis of three lightweight c...

Fatih Şahin · 0 citations
Open access Sep 2026

Dual-Threshold Conformal Deferral for Trustworthy Security Alert Triage

Automated alert triage can reduce Security Operations Center (SOC) workload, yet the validation-tuned thresholds deployed systems rely on carry no finite-sample control of their operational error rates and degrade unpredictably under distribution shift. We present a model-agnostic dual-threshold conformal deferral arch...

Fatih Şahin, Necibe Sare Mert · 0 citations
#edge computing Open access Aug 2026

FedMARL-LTI: Federated Multi-Agent Reinforcement Learning with LLM-Compatible Threat Intelligence for Cooperative Cyber Defense

FedMARL-LTI is presented, a federated multi-agent reinforcement learning framework whose architecture answers both pressures with a single decision: each organization’s threat intelligence is shared only as a differentially private 768-dimensional semantic embedding, never as raw data.

Fatih Şahin · 0 citations

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