Browsing Theses by Subject "Information Retrieval"
Now showing items 1-20 of 22
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Answering Consumer Health Questions on the Web
(University of Waterloo, 2022-12-21)Question answering is an important sub task in the field of information retrieval. Question answering has typically used reliable sources of information such as the Wikipedia for information. In this work, we look at ... -
Crawling, Collecting, and Condensing News Comments
(University of Waterloo, 2013-11-29)Traditionally, public opinion and policy is decided by issuing surveys and performing censuses designed to measure what the public thinks about a certain topic. Within the past five years social networks such as Facebook ... -
Design and Evaluation of Temporal Summarization Systems
(University of Waterloo, 2014-06-06)Temporal Summarization (TS) is a new track introduced as part of the Text REtrieval Conference (TREC) in 2013. This track aims to develop systems which can return important updates related to an event over time. In TREC ... -
Discovering Play Store Reviews Related to Specific Android App Issues
(University of Waterloo, 2018-09-20)Mobile App reviews may contain information relevant to developers. Developers can investigate these reviews to see what users of their apps are complaining about. However, the huge volume of incoming reviews is impractical ... -
The Effects of Time Constraints and Document Excerpts on Relevance Assessing Behavior
(University of Waterloo, 2018-08-30)Assessors who judge the relevance of documents to the search topics and perform the relevance assessment process are one of the main parts of Information Retrieval (IR) sys- tems evaluations. They play a significant role ... -
Efficient Temporal Synopsis of Social Media Streams
(University of Waterloo, 2013-08-07)Search and summarization of streaming social media, such as Twitter, requires the ongoing analysis of large volumes of data with dynamically changing characteristics. Tweets are short and repetitious -- lacking context and ... -
Enabling Cross-lingual Information Retrieval for African Languages
(University of Waterloo, 2023-04-28)Language diversity in NLP is critical in enabling the development of tools for a wide range of users. However, there are limited resources for building such tools for many languages, particularly those spoken in Africa. ... -
Evaluating Entity Relationship Recommenders in a Complex Information Retrieval Context
(University of Waterloo, 2014-05-21)Information Retrieval, as a field, has long subscribed to an orthodox evaluation approach known as the Cranfield paradigm. This approach and the assumptions that underpin it have been essential to building the traditional ... -
Evaluating Information Retrieval Systems With Multiple Non-Expert Assessors
(University of Waterloo, 2013-08-21)Many current test collections require the use of expert judgments during construction. The true label of each document is given by an expert assessor. However, the cost and effort associated with expert training and judging ... -
Exploitation of Redundant Inverse Term Frequency for Answer Extraction
(University of Waterloo, 2002)An automatic question answering system must find, within a corpus,short factual answers to questions posed in natural language. The process involves analyzing the question, retrieving information related to the question, ... -
Focused Retrieval
(University of Waterloo, 2010-12-03)Traditional information retrieval applications, such as Web search, return atomic units of retrieval, which are generically called ``documents''. Depending on the application, a document may be a Web page, an email message, ... -
Formulating Complex Queries Using Templates
(University of Waterloo, 2009-01-23)While many users have relatively general information needs, users who are familiar with a certain topic may have more specific or complex information needs. Such users already have some knowledge of a subject and its ... -
An In-Depth Exploration of the High-Quality Entity Linking for Information Retrieval: MMEAD
(University of Waterloo, 2023-12-19)Entity linking has emerged significantly during the digital information explosion, aiming to provide context and meaning to huge amounts of unstructured data. While traditional information retrieval primarily relied on ... -
Increasing the Efficiency of High-Recall Information Retrieval
(University of Waterloo, 2019-04-30)The goal of high-recall information retrieval (HRIR) is to find all, or nearly all, relevant documents while maintaining reasonable assessment effort. Achieving high recall is a key problem in the use of applications ... -
Integrating Skips and Bitvectors for List Intersection
(University of Waterloo, 2014-11-20)This thesis examines space-time optimizations of in-memory search engines. Search engines can answer queries quickly, but this is accomplished using significant resources in the form of multiple machines running concurrently. ... -
Inverted Index Partitioning Strategies for a Distributed Search Engine
(University of Waterloo, 2010-12-21)One of the greatest challenges in information retrieval is to develop an intelligent system for user and machine interaction that supports users in their quest for relevant information. The dramatic increase in the amount ... -
Learning Automatic Question Answering from Community Data
(University of Waterloo, 2012-09-19)Although traditional search engines can retrieval thousands or millions of web links related to input keywords, users still need to manually locate answers to their information needs from multiple returned documents or ... -
Misinformation Retrieval
(University of Waterloo, 2021-10-01)This work introduces the task of misinformation retrieval, identifying all documents containing misinformation for a given topic, and proposes a pipeline for misinformation retrieval on tweets. As part of the work, I curated ... -
A Study of Using Chinese Restaurant Process Mixture Models in Information Retrieval
(University of Waterloo, 2015-01-16)Retrieval systems help users to isolate relevant information from massive data collections. Usually, a user obtains useful information by submitting a query to such a system. One critical issue is that a query could have ... -
Studying Relevance Judging Behavior of Secondary Assessors
(University of Waterloo, 2016-08-03)Secondary assessors, individuals who do not originate search topics and are employed solely to judge the relevancy of documents, have been found to differ in their relevance judgments. Their relevance judgments are used ...