Browsing All Posts filed under »IR«

Daniel Rose about Product Search

November 10, 2011


We had Dan Rose from (search subsidy of as a visitor in CIIR today, who gave a talk titled ‘Lessons and Challenges from Product Search’. Throughout his talk, he listed the factors makes product search different from typical web search problem, how A9 approaches some of these issues, and future challenges. Here I […]

HCIR’11 — an eye-opening experience

October 25, 2011


HCIR’11 was like a great school to me. I always felt that a good 1-day workshop can be better than week-long conferences, yet this was a special opportunity for me who is trying to extend my horizon to more user-conscious part of IR research. Gary’s keynote was particularly enchanting, providing a good overview on HCIR […]

Research with ‘Style’ – Leif Azzopardi’s Recent Work

October 10, 2011


I’ve written several papers as a grad student, and it feels like I’ve learned a bit about paper writing over the last 4 years. Looking back, however, I feel that my research has followed several patterns found in information retrieval research. In other words, it’s not easy to speak of something as ‘my own research style’. […]

Keyword Search, Associative Browsing and Faceted Navigation

September 27, 2011


Keyword Search, Associative Browsing and Faceted Navigation are three major techniques of information access. Google provide search, browsing (find-similar links) and navigation (filtering by time and types), and there exists many domain-specific collections of structured data (e.g., Amazon, IMDB and Yelp!) which supports all three methods in different forms. In this post, I’ll compare these method, and consider ways to […]

FXPAL Paper on Exploratory Search

September 22, 2011


I read a paper from FXPAL on a new framework and system of exploratory search. It’s been months since I read it, yet I want make a connection with my recent work here. They characterize exploratory search as follows:  Exploratory search is often characterized by an evolving information need and the likelihood that the information […]

Implementing PRM-S retrieval model on Galago

March 10, 2011


PRM-S (Probabilistic Retrieval Model for Semistructured Data) is a novel retrieval model for structured documents — i.e. XML documents or emails.  My previous works show its effectiveness in the IMDB collection [1], and also in the TREC email known-item finding task [2]. (I have blogged about the model before) Recently I got requests for codes implementing […]

Issues on TREC Session Track

December 14, 2010


William Webber’s post on TREC Session Track got me thinking about what it means to evaluate a user’s session, or an interactive IR system in general. TREC Session track aims at extending the horizon of evaluation beyond the single query-response interaction, whose potential benefit is described in the following excerpt from the track overview paper: […]