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Abbas Ghaddar

14 accepted papers

2025

CHARPEVAL: Benchmarking Large Language Models’ Contextual Reasoning in Knowledge-Grounded Dialogue

ACL 2025finding

This paper presents CHARPEVAL, a challenging benchmark specifically designed to evaluate the ability of Large Language Models (LLMs) to perform contextualized reasoning in knowledge-grounded dialogue scenarios. The task involves selecting the correct response from 6 options, including 5 manually cra…

Cited by 0SourcePDFScholar
2025

Integral Transformer: Denoising Attention, Not Too Much Not Too Little

EMNLP 2025

Softmax self-attention often assigns disproportionate weight to semantically uninformative tokens such as punctuation and special tokens, a phenomenon known as attention noise. While recent methods like Cog Attention and the Differential Transformer have addressed this by introducing negative attent

2024

CHARP: Conversation History AwaReness Probing for Knowledge-grounded Dialogue Systems

ACL 2024findings

In this work, we dive deep into one of the popular knowledge-grounded dialogue benchmarks that focus on faithfulness, FaithDial. We show that a significant portion of the FaithDial data contains annotation artifacts, which may bias models towards completely ignoring the conversation history. We ther…

Cited by 0SourcePDFScholar
2024

CHIQ: Contextual History Enhancement for Improving Query Rewriting in Conversational Search

EMNLP 2024main

In this paper, we study how open-source large language models (LLMs) can be effectively deployed for improving query rewriting in conversational search, especially for ambiguous queries. We introduce CHIQ, a two-step method that leverages the capabilities of LLMs to resolve ambiguities in the conver…

2024

EWEK-QA : Enhanced Web and Efficient Knowledge Graph Retrieval for Citation-based Question Answering Systems

ACL 2024long

The emerging citation-based QA systems are gaining more attention especially in generative AI search applications. The importance of extracted knowledge provided to these systems is vital from both accuracy (completeness of information) and efficiency (extracting the information in a timely manner).…

2024

OTTAWA: Optimal TransporT Adaptive Word Aligner for Hallucination and Omission Translation Errors Detection

ACL 2024findings

Recently, there has been considerable attention on detecting hallucinations and omissions in Machine Translation (MT) systems. The two dominant approaches to tackle this task involve analyzing the MT system’s internal states or relying on the output of external tools, such as sentence similarity or…

2023

AraMUS: Pushing the Limits of Data and Model Scale for Arabic Natural Language Processing

ACL 2023findings

Developing monolingual large Pre-trained Language Models (PLMs) is shown to be very successful in handling different tasks in Natural Language Processing (NLP). In this work, we present AraMUS, the largest Arabic PLM with 11B parameters trained on 529GB of high-quality Arabic textual data. AraMUS ac…

2022

CILDA: Contrastive Data Augmentation Using Intermediate Layer Knowledge Distillation

COLING 2022main

Knowledge distillation (KD) is an efficient framework for compressing large-scale pre-trained language models. Recent years have seen a surge of research aiming to improve KD by leveraging Contrastive Learning, Intermediate Layer Distillation, Data Augmentation, and Adversarial Training. In this wor…

Cited by 4SourcePDFScholar
2022

RAIL-KD: RAndom Intermediate Layer Mapping for Knowledge Distillation

NAACL 2022findings

Intermediate layer knowledge distillation (KD) can improve the standard KD technique (which only targets the output of teacher and student models) especially over large pre-trained language models. However, intermediate layer distillation suffers from excessive computational burdens and engineering…

Cited by 26SourcePDFScholar
2022

Revisiting Pre-trained Language Models and their Evaluation for Arabic Natural Language Processing

EMNLP 2022main

There is a growing body of work in recent years to develop pre-trained language models (PLMs) for the Arabic language. This work addresses two major problems in existing Arabic PLMs that limit the progress of the Arabic NLU and NLG fields. First, existing Arabic PLMs are not well-explored and their…

2021

NATURE: Natural Auxiliary Text Utterances for Realistic Spoken Language Evaluation

NeurIPS 2021poster

Slot-filling and intent detection are the backbone of conversational agents such as voice assistants, and are active areas of research. Even though state-of-the-art techniques on publicly available benchmarks show impressive performance, their ability to generalize to realistic scenarios is yet to b…

Cited by 2SourceScholar
2021

RW-KD: Sample-wise Loss Terms Re-Weighting for Knowledge Distillation

EMNLP 2021finding

Knowledge Distillation (KD) is extensively used in Natural Language Processing to compress the pre-training and task-specific fine-tuning phases of large neural language models. A student model is trained to minimize a convex combination of the prediction loss over the labels and another over the te…

Cited by 11SourcePDFScholar
2021

Towards Zero-Shot Knowledge Distillation for Natural Language Processing

EMNLP 2021main

Knowledge distillation (KD) is a common knowledge transfer algorithm used for model compression across a variety of deep learning based natural language processing (NLP) solutions. In its regular manifestations, KD requires access to the teacher’s training data for knowledge transfer to the student…

Cited by 28SourcePDFScholar
2021

Universal-KD: Attention-based Output-Grounded Intermediate Layer Knowledge Distillation

EMNLP 2021main

Intermediate layer matching is shown as an effective approach for improving knowledge distillation (KD). However, this technique applies matching in the hidden spaces of two different networks (i.e. student and teacher), which lacks clear interpretability. Moreover, intermediate layer KD cannot easi…

Cited by 29SourcePDFScholar