
Nikolaos Aletras
interpretability
domain adaptation
vqa
bert
knowledge distillation
social media
transformers
domain classification
sentiment analysis
quality estimation
vision
hate speech
information extraction
graph neural networks
transformer
18
presentations
71
number of views
SHORT BIO
Nikos Aletras is a Professor in Natural Language Processing (NLP) in the Computer Science Department at the University of Sheffield, co-affiliated with the Machine Learning (ML) group. Previously, he was a research scientist at Amazon (Core ML and Alexa) and a research associate at UCL, Department of Computer Science, Media Futures Group. He completed a PhD in NLP at the University of Sheffield. His research interests are in NLP, Machine Learning and Data Science. He develops text analysis methods to solve problems in other scientific areas such as (computational) social and legal science.
Presentations

Trading Syntax Trees for Wordpieces: Target-oriented Opinion Words Extraction with Wordpieces and Aspect Enhancement
Samuel Mensah and 2 other authors

Incorporating Attribution Importance for Improving Faithfulness Metrics
Zhixue Zhao and 1 other author

HashFormers: Towards Vocabulary-independent Pre-trained Transformers
Huiyin Xue and 1 other author

Improving Graph-Based Text Representations with Character and Word Level N-grams
Wenzhe Li and 1 other author

Domain Classification-based Source-specific Term Penalization for Domain Adaptation in Hate-speech Detection
Tulika Bose and 3 other authors

Combining Humor and Sarcasm for Improving Political Parody Detection
Danae Sánchez Villegas and 4 other authors

Flexible Instance-Specific Rationalization of NLP Models
George Chrysostomou and 1 other author

Frustratingly Simple Pretraining Alternatives to Masked Language Modeling
Atsuki Yamaguchi and 3 other authors

Active Learning by Acquiring Contrastive Examples
Katerina Margatina and 3 other authors

Enjoy the Salience: Towards Better Transformer-based Faithful Explanations with Word Salience
George Chrysostomou and 1 other author

Active Learning by Acquiring Contrastive Examples
Katerina Margatina and 3 other authors

An Empirical Study on Leveraging Position Embeddings for Target-oriented Opinion Words Extraction
Samuel Mensah and 2 other authors

Improving the Faithfulness of Attention-based Explanations with Task-specific Information for Text Classification
George Chrysostomou and 1 other author

In Factuality: Efficient Integration of Relevant Facts for Visual Question Answering
Peter Vickers and 3 other authors

Knowledge Distillation for Quality Estimation
Amit Gajbhiye and 6 other authors

Paragraph-level Rationale Extraction through Regularization: A case study on European Court of Human Rights Cases
Ilias Chalkidis and 5 other authors