All Stories

  1. Plan-and-Refine in RAG: Generating Diverse and Comprehensive Responses through Global Exploration and Local Exploitation

    Article • July 2026, ACM (Association for Computing Machinery)

    Hamed Zamani, Alireza Salemi

  2. Evaluation of Agents under Simulated AI Marketplace Dynamics

    Article • July 2026, ACM (Association for Computing Machinery)

    To Eun Kim, Hamed Zamani, Alireza Salemi

  3. Learning from Natural Language Feedback for Personalized Question Answering

    Article • July 2026, ACM (Association for Computing Machinery)

    Alireza Salemi, Hamed Zamani

  4. Uncertainty Quantification for Retrieval-Augmented Reasoning

    Article • July 2026, ACM (Association for Computing Machinery)

    Faegheh Hasibi, Hamed Zamani

  5. Total Recall QA: A Verifiable Evaluation Suite for Deep Research Agents

    Article • July 2026, ACM (Association for Computing Machinery)

    Faegheh Hasibi, Hamed Zamani

  6. Scaling Laws for Embedding Dimension in Information Retrieval

    Article • July 2026, ACM (Association for Computing Machinery)

    Hamed Zamani

  7. Learning to Reason for Multi-Step Retrieval of Personal Context in Personalized Question Answering

    Article • July 2026, ACM (Association for Computing Machinery)

    Maryam Amirizaniani, Alireza Salemi, Hamed Zamani

  8. Exploring and Improving Cross- and Multi-Domain Personalized Question Answering via a Dual Retrieval Augmentation Approach

    Article • July 2026, ACM (Association for Computing Machinery)

    Hamed Zamani

  9. Pathways of Thoughts: Multi-Directional Thinking for Long-form Personalized Question Answering

    Article • April 2026, ACM (Association for Computing Machinery)

    Alireza Salemi, Hamed Zamani

  10. ProActLLM: Proactive Conversational Information Seeking with Large Language Models

    Article • November 2025, ACM (Association for Computing Machinery)

    Hamed Zamani, negar arabzadeh

  11. Learning to Rank for Multiple Retrieval-Augmented Models through Iterative Utility Maximization

    Article • July 2025, ACM (Association for Computing Machinery)

    Alireza Salemi, Hamed Zamani

  12. Comparing Retrieval-Augmentation and Parameter-Efficient Fine-Tuning for Privacy-Preserving Personalization of Large Language Models

    Article • July 2025, ACM (Association for Computing Machinery)

    Alireza Salemi, Hamed Zamani

  13. Reliable Annotations with Less Effort: Evaluating LLM-Human Collaboration in Search Clarifications

    Article • July 2025, ACM (Association for Computing Machinery)

    Leila Tavakoli, Hamed Zamani

  14. Distillation and Refinement of Reasoning in Small Language Models for Document Re-ranking

    Article • July 2025, ACM (Association for Computing Machinery)

    Hamed Zamani

  15. Bridging Personalization and Control in Scientific Personalized Search

    Article • July 2025, ACM (Association for Computing Machinery)

    Hamed Zamani

  16. The Second Tutorial on Retrieval-Enhanced Machine Learning: Synthesis and Opportunities

    Article • July 2025, ACM (Association for Computing Machinery)

    To Eun Kim, Hamed Zamani, Alireza Salemi

  17. Scaling Sparse and Dense Retrieval in Decoder-Only LLMs

    Article • July 2025, ACM (Association for Computing Machinery)

    Hamed Zamani

  18. Hypencoder: Hypernetworks for Information Retrieval

    Article • July 2025, ACM (Association for Computing Machinery)

    Hamed Zamani

  19. Pre-Trained Models for Search and Recommendation: Introduction to the Special Issue—Part 2

    Article • ACM Transactions on Information Systems, July 2025, ACM (Association for Computing Machinery)

    Aixin Sun, Hamed Zamani

  20. Accelerating Retrieval-Augmented Generation

    Article • March 2025, ACM (Association for Computing Machinery)

    Alireza Salemi, Hamed Zamani

  21. Pre-trained Models for Search and Recommendation: Introduction to the Special Issue - Part 1

    Article • ACM Transactions on Information Systems, January 2025, ACM (Association for Computing Machinery)

    Aixin Sun, Hamed Zamani

  22. Retrieval-Enhanced Machine Learning: Synthesis and Opportunities

    Article • December 2024, ACM (Association for Computing Machinery)

    To Eun Kim, Alireza Salemi, Hamed Zamani

  23. Online and Offline Evaluation in Search Clarification

    Article • ACM Transactions on Information Systems, November 2024, ACM (Association for Computing Machinery)

    Leila Tavakoli, Mark Sanderson, Hamed Zamani, Leila Tavakoli

  24. Special Issue on Conversational Information Seeking

    Article • ACM Transactions on the Web, October 2024, ACM (Association for Computing Machinery)

    Hamed Zamani

  25. First Workshop on Generative AI for Recommender Systems and Personalization

    Article • August 2024, ACM (Association for Computing Machinery)

    Hamed Zamani

  26. Stochastic RAG: End-to-End Retrieval-Augmented Generation through Expected Utility Maximization

    Article • July 2024, ACM (Association for Computing Machinery)

    Hamed Zamani

  27. Third Workshop on Personalization and Recommendations in Search (PaRiS)

    Article • July 2024, ACM (Association for Computing Machinery)

    Hamed Zamani, Hongning Wang

  28. Towards a Search Engine for Machines: Unified Ranking for Multiple Retrieval-Augmented Large Language Models

    Article • July 2024, ACM (Association for Computing Machinery)

    Hamed Zamani, Alireza Salemi

  29. The Second Workshop on Large Language Models for Individuals, Groups, and Society

    Article • July 2024, ACM (Association for Computing Machinery)

    Hongning Wang, Hamed Zamani

  30. ProCIS: A Benchmark for Proactive Retrieval in Conversations

    Article • July 2024, ACM (Association for Computing Machinery)

    Hamed Zamani

  31. Planning Ahead in Generative Retrieval: Guiding Autoregressive Generation through Simultaneous Decoding

    Article • July 2024, ACM (Association for Computing Machinery)

    Hamed Zamani

  32. Evaluating Retrieval Quality in Retrieval-Augmented Generation

    Article • July 2024, ACM (Association for Computing Machinery)

    Hamed Zamani, Alireza Salemi

  33. Optimization Methods for Personalizing Large Language Models through Retrieval Augmentation

    Article • July 2024, ACM (Association for Computing Machinery)

    Alireza Salemi, Hamed Zamani

  34. Scalable and Effective Generative Information Retrieval

    Article • May 2024, ACM (Association for Computing Machinery)

    Hamed Zamani

  35. WSDM 2024 Workshop on Large Language Models for Individuals, Groups, and Society

    Article • March 2024, ACM (Association for Computing Machinery)

    Hamed Zamani, Hongning Wang

  36. The 3rd International Workshop on Interactive and Scalable Information Retrieval Methods for eCommerce (ISIR-eCom 2024)

    Article • March 2024, ACM (Association for Computing Machinery)

    Hamed Zamani, linsey pang

  37. Generalized Weak Supervision for Neural Information Retrieval

    Article • ACM Transactions on Information Systems, February 2024, ACM (Association for Computing Machinery)

    Hamed Zamani

  38. Large Language Model Augmented Narrative Driven Recommendations

    Article • September 2023, ACM (Association for Computing Machinery)

    Hamed Zamani

  39. Pre-Training Multi-Modal Dense Retrievers for Outside-Knowledge Visual Question Answering

    Article • August 2023, ACM (Association for Computing Machinery)

    Alireza Salemi, Hamed Zamani

  40. A Personalized Dense Retrieval Framework for Unified Information Access

    Article • July 2023, ACM (Association for Computing Machinery)

    Hamed Zamani

  41. Editable User Profiles for Controllable Text Recommendations

    Article • July 2023, ACM (Association for Computing Machinery)

    Hamed Zamani

  42. FiD-Light: Efficient and Effective Retrieval-Augmented Text Generation

    Article • July 2023, ACM (Association for Computing Machinery)

    Hamed Zamani

  43. Soft Prompt Decoding for Multilingual Dense Retrieval

    Article • July 2023, ACM (Association for Computing Machinery)

    Hamed Zamani

  44. Multivariate Representation Learning for Information Retrieval

    Article • July 2023, ACM (Association for Computing Machinery)

    Hamed Zamani

  45. A Symmetric Dual Encoding Dense Retrieval Framework for Knowledge-Intensive Visual Question Answering

    Article • July 2023, ACM (Association for Computing Machinery)

    Hamed Zamani, Alireza Salemi

  46. SIGIR 2023 Workshop on Retrieval Enhanced Machine Learning (REML @ SIGIR 2023)

    Article • July 2023, ACM (Association for Computing Machinery)

    Hamed Zamani

  47. The 2nd Workshop on Interactive and Scalable Information Retrieval Methods for eCommerce (ISIR-eCom)

    Article • April 2023, ACM (Association for Computing Machinery)

    Hamed Zamani, linsey pang

  48. Tutorials at The Web Conference 2023

    Article • April 2023, ACM (Association for Computing Machinery)

    Dr Olivier Jeunen, Liat Levontin, Josiah Poon, Amit Sheth, Johann Trippas, Dr Shoujin Wang, Jaemin Yoo, Hamed Zamani, Meike Zehlike, Xikun ZHANG, Yushan Jiang, Henry Weld, Haoyang Li, Caren Han, Hande Kucuk McGinty

  49. Revisiting Open Domain Query Facet Extraction and Generation

    Article • August 2022, ACM (Association for Computing Machinery)

    Hamed Zamani

  50. Stochastic Retrieval-Conditioned Reranking

    Article • August 2022, ACM (Association for Computing Machinery)

    Hamed Zamani

  51. Conversational Information Seeking

    Article • July 2022, ACM (Association for Computing Machinery)

    Johann Trippas, Hamed Zamani

  52. Curriculum Learning for Dense Retrieval Distillation

    Article • July 2022, ACM (Association for Computing Machinery)

    Hamed Zamani

  53. MIMICS-Duo

    Article • July 2022, ACM (Association for Computing Machinery)

    Leila Tavakoli, Hamed Zamani, Mark Sanderson, Johanne Trippas

  54. Retrieval-Enhanced Machine Learning

    Article • July 2022, ACM (Association for Computing Machinery)

    Hamed Zamani

  55. Conversational Search and Recommendation: Introduction to the Special Issue

    Article • ACM Transactions on Information Systems, October 2021, ACM (Association for Computing Machinery)

    Mark Sanderson, Hamed Zamani

  56. Learning Multiple Intent Representations for Search Queries

    Article • October 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  57. Context-aware Target Apps Selection and Recommendation for Enhancing Personal Mobile Assistants

    Article • ACM Transactions on Information Systems, July 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  58. Improving Transformer-Kernel Ranking Model Using Conformer and Query Term Independence

    Article • July 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  59. Passage Retrieval for Outside-Knowledge Visual Question Answering

    Article • July 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  60. Current Challenges and Future Directions in Podcast Information Access

    Article • July 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  61. Learning Robust Dense Retrieval Models from Incomplete Relevance Labels

    Article • July 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  62. Generalizing Discriminative Retrieval Models using Generative Tasks

    Article • April 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  63. Tip of the Tongue Known-Item Retrieval

    Article • March 2021, ACM (Association for Computing Machinery)

    Hamed Zamani

  64. Generating Clarifying Questions for Information Retrieval

    Article • April 2020, ACM (Association for Computing Machinery)

    Hamed Zamani

  65. Neural models for information retrieval without labeled data

    Article • ACM SIGIR Forum, December 2019, ACM (Association for Computing Machinery)

    Hamed Zamani

  66. An Analysis of Approaches Taken in the ACM RecSys Challenge 2018 for Automatic Music Playlist Continuation

    Article • ACM Transactions on Intelligent Systems and Technology, November 2019, ACM (Association for Computing Machinery)

    Hamed Zamani

  67. Performance Prediction for Non-Factoid Question Answering

    Article • September 2019, ACM (Association for Computing Machinery)

    Hamed Zamani

  68. Analyzing and Predicting News Popularity in an Instant Messaging Service

    Article • July 2019, ACM (Association for Computing Machinery)

    Hamed Zamani

  69. Asking Clarifying Questions in Open-Domain Information-Seeking Conversations

    Article • July 2019, ACM (Association for Computing Machinery)

    Hamed Zamani

  70. From Neural Re-Ranking to Neural Ranking

    Article • October 2018, ACM (Association for Computing Machinery)

    Hamed Zamani

  71. In Situ and Context-Aware Target Apps Selection for Unified Mobile Search

    Article • October 2018, ACM (Association for Computing Machinery)

    Hamed Zamani

  72. Neural Query Performance Prediction using Weak Supervision from Multiple Signals

    Article • June 2018, ACM (Association for Computing Machinery)

    Hamed Zamani

  73. Universal Approximation Functions for Fast Learning to Rank

    Article • June 2018, ACM (Association for Computing Machinery)

    Hamed Zamani

  74. SIGIR 2018 Workshop on Learning from Limited or Noisy Data for Information Retrieval

    Article • June 2018, ACM (Association for Computing Machinery)

    Hamed Zamani, Hang Li

  75. ACM SIGIR Student Liaison Program

    Article • ACM SIGIR Forum, February 2018, ACM (Association for Computing Machinery)

    Jiaxin Mao, Johann Trippas, Hamed Zamani

  76. Neural Ranking Models with Multiple Document Fields

    Article • February 2018, ACM (Association for Computing Machinery)

    Hamed Zamani

  77. Improving Retrieval Performance for Verbose Queries via Axiomatic Analysis of Term Discrimination Heuristic

    Article • August 2017, ACM (Association for Computing Machinery)

    Hamed Zamani, Azadeh Shakery

  78. Relevance-based Word Embedding

    Article • August 2017, ACM (Association for Computing Machinery)

    Hamed Zamani

  79. Word Embedding Causes Topic Shifting; Exploit Global Context!

    Article • August 2017, ACM (Association for Computing Machinery)

    Hamed Zamani

  80. Situational Context for Ranking in Personal Search

    Article • April 2017, ACM (Association for Computing Machinery)

    Hamed Zamani

  81. Pseudo-Relevance Feedback Based on Matrix Factorization

    Article • October 2016, ACM (Association for Computing Machinery)

    Hamed Zamani, Azadeh Shakery

  82. Axiomatic Analysis for Improving the Log-Logistic Feedback Model

    Article • July 2016, ACM (Association for Computing Machinery)

    Azadeh Shakery, Hamed Zamani