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Ratan J. Sebastian

2 papers hereh-index 234 citations10 works total

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author position
  • first author2

Across the 2 of 2 papers where every author was matched, so the position is known.

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  • cs.IR2

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collaborators

2 papers

cs.IR2026

Using Hierarchical Controlled Vocabularies to Understand CLIP Retrieval Failures in Historical Photo Collections

Ratan Sebastian, Anett Hoppe, Christoph Rippe +1

GLAM institutions (Galleries, Libraries, Archives, and Museums) organise image access using controlled vocabularies such as the Art and Architecture Thesaurus (AAT). For content-ba…

cs.IR2025

Validating LLM-Generated Relevance Labels for Educational Resource Search

Ratan J. Sebastian, Anett Hoppe

Manual relevance judgements in Information Retrieval are costly and require expertise, driving interest in using Large Language Models (LLMs) for automatic assessment. While LLMs h…

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