Ranking in information retrieval has been traditionally approached as a pursuit of relevant
information, under the assumption that the users' information needs are unambiguously …

Web search queries are often ambiguous or multi-faceted, which makes a simple ranked list
of results inadequate. To assist information finding for such faceted queries, we explore a …

This study evaluates 30 IR evaluation measures or their instances, of which nine are for
adhoc IR and 21 are for diversified IR, primarily from the viewpoint of whether their …

In this paper, we provide an overview of the NTCIR IMine task, which is a core task of NTCIR-
11 and also a succeeding work of INTENT@ NTCIR-9 and INTENT2@ NTCIR-10 tasks …

Faceted search helps users by offering drill-down options as a complement to the keyword
input box, and it has been used successfully for many vertical applications, including e …

We examine the “goodness” of ranked retrieval evaluation measures in terms of how well
they align with users' Search Engine Result Page (SERP) preferences for web search. The …

Given an ambiguous or underspecified query, search result diversification aims at
accomodating different user intents within a single" entry-point" result page. However, some …

We present a simple and versatile framework for evaluating ranked lists in terms of Group
Fairness and Relevance, in which the groups (ie, possible attribute values) can be either …

This paper provides an overview of the NTCIR-10 INTENT-2 task (the second INTENT task),
which comprises the Subtopic Mining and the Document Ranking subtasks. INTENT-2 …

For intrinsically diverse tasks, in which collecting extensive information from different aspects
of a topic is required, searchers often have difficulty formulating queries to explore diverse …