Author

Abdullah Alajmi

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Open access Sep 2026

A Systematic Multi-Dataset, Multi-Seed Evaluation of Preprocessing Strategies for Retinal Optic Disc and Cup Segmentation

CLAHE applied to full-resolution images is the single most consistently beneficial preprocessing choice across all three datasets and may be beneficial as a default strategy.

Abdullah Alajmi, Youssef Elnahal, Mohamed Othman et al. · Diagnostics · 0 citations

2026

Hybrid Learning Framework for Throughput Enhancement in IoT Networks With Semi-Grant-Free NOMA

Semi-grant-free non-orthogonal multiple access (SGF-NOMA) schemes group one grant-based (GB) user with multiple grant-free (GF) users into one time/frequency resource block (RB) to enhance spectral efficiency. Due to the sporadic traffic of GF users and the stringent quality of service (QoS) requirement of the GB user,...

M. Fayaz, Sohail Abbas, Abdullah Alajmi et al. · IEEE Transactions on Cogniti... · 0 citations