Papers by Ralf Krestel
DDxGym: Online Transformer Policies in a Knowledge Graph Based Natural Language Environment (2024.lrec-main)
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Benjamin Winter, Alexei Gustavo Figueroa Rosero, Alexander Loeser, Felix Alexander Gers, Nancy Katerina Figueroa Rosero, Ralf Krestel
| Challenge: | specialized OpenAI Gym environment for clinical differential diagnosis is limited by data access due to privacy concerns. |
| Approach: | They propose a specialized OpenAI Gym environment for clinical differential diagnosis . they frame the task as a natural-language-based reinforcement learning problem . |
| Outcome: | The proposed model improves over baselines and improves on existing models. |
Multifaceted Domain-Specific Document Embeddings (2021.naacl-demos)
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| Challenge: | Current document embeddings require large training corpora but fail to learn high-quality representations when confronted with a small number of domain-specific documents and rare terms. |
| Approach: | They propose a faceted domain encoder that transforms each document into a single embedding vector . they use a Siamese neural network architecture to leverage knowledge graphs to enhance the embeddables . |
| Outcome: | The proposed model achieves the same embedding quality as state-of-the-art models while requiring only a tiny fraction of training data. |
Prediction for the Newsroom: Which Articles Will Get the Most Comments? (N18-3)
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| Challenge: | a new method to support manual moderation of discussion sections is proposed. |
| Approach: | They propose to support manual moderation by proactively drawing attention of moderators to articles that most likely need their intervention. |
| Outcome: | The proposed method outperforms the current state-of-the-art methods on a 7-million-comment dataset. |