• Publications
  • Influence
Semantics + filtering + search = twitcident. exploring information in social web streams
Automatically filtering relevant information about a real-world incident from Social Web streams and making the information accessible and findable in the given context of the incident areExpand
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Twitcident: fighting fire with information from social web streams
In this paper, we present Twitcident, a framework and Web-based system for filtering, searching and analyzing information about real-world incidents or crises. Twitcident connects to emergencyExpand
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Predicting the effectiveness of queries and retrieval systems
  • C. Hauff
  • Computer Science
  • SIGF
  • 18 August 2010
We consider users' attempts to express their information needs through queries, or search requests and try to predict whether those requests will be of high or low quality. The second type of methodsExpand
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Improved query difficulty prediction for the web
Query performance prediction aims to predict whether a query will have a high average precision given retrieval from a particular collection, or low average precision. An accurate estimator of theExpand
  • 96
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A survey of pre-retrieval query performance predictors
The focus of research on query performance prediction is to predict the effectiveness of a query given a search system and a collection of documents. If the performance of queries can be estimated inExpand
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Working Notes for the Placing Task at MediaEval 2013
This paper provides a description of the MediaEval 2013 Placing Task. The primary task of location estimation asks participants to place images on the world map, that is, to automatically estimateExpand
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The Combination and Evaluation of Query Performance Prediction Methods
In this paper, we examine a number of newly applied methods for combining pre-retrieval query performance predictors in order to obtain a better prediction of the query's performance. However, inExpand
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Scope of negation detection in sentiment analysis
An important part of information-gathering behaviour has always been to find out what other people think and whether they have favourable (positive) or unfavourable (negative) opinions about theExpand
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A comparison of user and system query performance predictions
Query performance prediction methods are usually applied to estimate the retrieval effectiveness of queries, where the evaluation is largely system sided. However, little work has been conducted toExpand
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Leveraging User Modeling on the Social Web with Linked Data
Social Web applications such as Twitter and Flickr are widely used services that generate large volumes of usage data. The challenge of modeling the use and the users of such Social Web servicesExpand
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