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A promising method to improve the performance of information retrieval systems is to approach retrieval tasks as a supervised classification problem. Previous user interactions, e.g. gathered from a thorough log file analysis, can be used to train classifiers which aim to inference relevance of retrieved documents based on user interactions. A problem in this approach is, however, the large imbalance...
This paper exploits a media document representation called feature terms to generate a query from multiple media examples, e.g. images. A feature term denotes a continuous interval of a media feature dimension. This approach (1) helps feature accumulation from multiple examples; (2) enables the exploration of text-based retrieval models for multimedia retrieval. Three criteria, minimised chi2, minimised...
In this paper, we present a user study on a novel video search interface based on the concept of aspect browsing. We aim to confirm whether automatically suggesting new aspects can increase the performance of an aspect-based browser. The proposed strategy is to assist the user in exploratory video search by actively suggesting new query terms and video shots. We use a clustering technique to identify...
This paper proposes an aggregative query generation which exploits a media document representation called feature term to create a query from multiple media examples, e.g. images. A feature term denotes an interval of one media feature dimension, such as a bin in colour histogram. This approach (1) can easily accumulate features from multiple query examples to generate an efficient query; (2) enables...
Over the years, recommender systems have been systematically applied in both industry and academia to assist users in dealing with information overload. One of the factors that determine the performance of a recommender system is user feedback, which has been traditionally communicated through the application of explicit and implicit feedback techniques. In this paper, we propose a novel video search...
Powerbrowser builds on a dynamic, real-time HTML to WML conversion tool and employs implicit feedback to understand a user's information needs. In addition, we have provided nonlinear navigation, and query-biased summarization. Based on these features, we have developed 3 separate versions of Powerbrowser. In this paper we describe and evaluate three strategies for information retrieval on mobile...
A derivative of the pEX3 expression vector was constructed that codes for the first 407 amino acids of the 1051 amino acids of the pEX3 fusion protein. The amount of truncated fusion protein (40 mg/g cells), obtained by expression in E. coli, was similar to that produced by the original pEX3 vector. The truncated fusion protein was purified more easily from E. coli contaminants than the original fusion...
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