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N. Semmar

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Preprint Aug 2026

AraSSM: A bidirectional state-space encoder for Arabic masked language modeling

A bidirectional Mamba encoder pretrained via masked language modeling on a corpus combining Arabic Wikipedia and CulturaX text is introduced, trained end-to-end on four consumer-grade NVIDIA RTX 2080Ti GPUs (11GB) over approximately ten days.

A. A. Aliane, H. Aliane, N. Semmar · 0 citations
Preprint Aug 2026

Efficient Multilingual Neural Machine Translation via Corpus-Driven Vocabulary Pruning: An English-Arabic Case Study

This paper proposes a general optimization framework that combines a vocabulary pruning method with a targeted fine-tuning protocol for MNMT models, and reduces the vocabulary size from over 128,000 to approximately 10,000 tokens, enabling a 60% memory saving without any loss in performance.

A. A. Aliane, N. Semmar, H. Aliane · 0 citations
Preprint Aug 2026

Decomposed Entailment for Factuality Checking and Hallucination Detection

HallDetect, a lightweight, reference-free, and black-box framework for hallucination detection, is presented, a lightweight, reference-free, and black-box framework for hallucination detection that is evaluated not only on summarization but across a broader range of source-grounded generation settings.

Achir Oukelmoun, N. Semmar, Gaël de Chalendar · 0 citations

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