Thanos Papaoikonomou

Thanos Papaoikonomou

Senior ML Engineer

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Articles by Thanos Papaoikonomou
Improve search results by calibrating model scoring in Elasticsearch
Elasticsearch Labs

Improve search results by calibrating model scoring in Elasticsearch

Learn how to leverage annotated data to calibrate semantic model scoring for better search results

Quentin Herreros
Exploring depth in a 'retrieve-and-rerank' pipeline
Elasticsearch Labs

Exploring depth in a 'retrieve-and-rerank' pipeline

Select an optimal re-ranking depth for your model and dataset.

Thanos Papaoikonomou
Introducing Elastic Rerank: Elastic's new semantic re-ranker model
Elasticsearch Labs

Introducing Elastic Rerank: Elastic's new semantic re-ranker model

Learn about how Elastic's new re-ranker model was trained and how it performs.

Thomas Veasey
What is semantic reranking and how to use it?
Elasticsearch Labs

What is semantic reranking and how to use it?

Introducing the concept of semantic reranking. Learn about the trade-offs using semantic reranking in search and RAG pipelines.

Thomas Veasey
Evaluating search relevance part 2 - Phi-3 as relevance judge
Elasticsearch Labs

Evaluating search relevance part 2 - Phi-3 as relevance judge

Using the Phi-3 language model as a search relevance judge, with tips & techniques to improve the agreement with human-generated annotation.

Thanos Papaoikonomou
Evaluating search relevance part 1 - The BEIR benchmark
Elasticsearch Labs

Evaluating search relevance part 1 - The BEIR benchmark

Learn to evaluate your search system in the context of better understanding the BEIR benchmark, with tips & techniques to improve your search evaluation processes.

Thanos Papaoikonomou
Evaluating scalar quantization in Elasticsearch
Elasticsearch Labs

Evaluating scalar quantization in Elasticsearch

Learn how scalar quantization can be used to reduce the memory footprint of vector embeddings in Elasticsearch through an experiment.

RAG evaluation metrics: A journey through metrics
Elasticsearch Labs

RAG evaluation metrics: A journey through metrics

Explore RAG evaluation metrics like BLEU score, ROUGE score, PPL, BARTScore, and more. Discover how Elastic is evaluating RAG with UniEval.

Quentin Herreros