Rethinking ColBERT's Projection Layer, A Systematic Review of RAG Challenges and Applications, and More!

Vol.126 for Oct 13 - Oct 19, 2025

Stay Ahead of the Curve with the Latest Advancements and Discoveries in Information Retrieval.

This week’s newsletter highlights the following research:

1. Improving ColBERT with Multi-Layer Feedforward Networks, from Mixedbread AI

2. Logarithmic-Complexity Retrieval via Semantic Tree Navigation, from Google

3. An Embedding-Based Framework for Efficient Cross-Passage Reranking in RAG, from Yuan et al.

4. A Systematic Review of RAG Challenges and Applications, from Wang et al.

5. Learning Separate Embeddings for Explicit and Implicit Sentence Semantics, from Oda et al.

6. How Cold-Start Recommenders Learn to Amplify Popularity Bias, from Queen Mary University of London

7. Fine-Tuning LLaMA-3 for Large-Scale Feed Retrieval, from LinkedIn

8. Integrating Chain-of-Thought Reasoning into Generative Recommendation Systems, from Kuaishou

9. A Practitioner’s Guide to Identifying and Addressing RAG System Failures, from Layer 6 AI

10. Training Highly Efficient Small-Scale Late Interaction Retrievers, from Mixedbread AI