Search Results for author: Vassilis Plachouras

Found 12 papers, 3 papers with code

Self-Supervised Pretraining for Heterogeneous Hypergraph Neural Networks

no code implementations19 Nov 2023 Abdalgader Abubaker, Takanori Maehara, Madhav Nimishakavi, Vassilis Plachouras

SPHH is consist of two self-supervised pretraining tasks that aim to simultaneously learn both local and global representations of the entities in the hypergraph by using informative representations derived from the hypergraph structure.

Link Prediction Node Classification

Is Meta-Learning the Right Approach for the Cold-Start Problem in Recommender Systems?

no code implementations16 Aug 2023 Davide Buffelli, Ashish Gupta, Agnieszka Strzalka, Vassilis Plachouras

In the past few years, deep learning methods have attracted a lot of research, and are now heavily used in modern real-world recommender systems.

Meta-Learning Recommendation Systems +1

attr2vec: Jointly Learning Word and Contextual Attribute Embeddings with Factorization Machines

no code implementations NAACL 2018 Fabio Petroni, Vassilis Plachouras, Timothy Nugent, Jochen L. Leidner

Our experimental results on a text classification task demonstrate that using attr2vec to jointly learn embeddings for words and Part-of-Speech (POS) tags improves results compared to learning the embeddings independently.

Attribute Dependency Parsing +6

A Comparison of Two Paraphrase Models for Taxonomy Augmentation

no code implementations NAACL 2018 Vassilis Plachouras, Fabio Petroni, Timothy Nugent, Jochen L. Leidner

Our results show that paraphrasing is a viable method to enrich a taxonomy with more terms, and that Moses consistently outperforms the sequence-to-sequence neural model.

Document Classification Machine Translation +3

Ethical by Design: Ethics Best Practices for Natural Language Processing

no code implementations WS 2017 Jochen L. Leidner, Vassilis Plachouras

While a number of previous works exist that discuss ethical issues, in particular around big data and machine learning, to the authors{'} knowledge this is the first account of NLP and ethics from the perspective of a principled process.

Ethics

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