Okan Ozturkmenoglu

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This paper present the details of participation of DEMIR (Dokuz Eylul University Multimedia Information Retrieval) research team to the context of our participation to the ImageCLEF 2011 Medical Retrieval task. This year, we evaluated fusion and re-ranking method which is based on the best low level feature of images with best text retrieval result. We(More)
This paper present the details of participation of DEMIR (Dokuz Eylül University Multimedia Information Retrieval) research team to the ImageCLEF 2013 Medical Retrieval task. This year, we participated to two subtasks: modality classification and ad-hoc image-based retrieval. For them, our central method is integrated combination multimodal retrieval(More)
This paper present the details of participation of DEMIR (Dokuz Eylul University Multimedia Information Retrieval) research team to the ImageCLEF 2012 Medical Retrieval task. This year, we evaluated impact of our proposed Integrated Combination method and Explicit Graded relevance feedback on the most descriptive low level features of images and best text(More)
This paper present the participation details of DEMIR (Dokuz Eylul University Multimedia Information Retrieval) research team at ImageCLEFwiki2011. This year we investigate on evaluating of different weighting models on text retrieval performance. In the case of low-level feature selection, we extracted different features and examined their performance to(More)
This paper presents the details of participation of DEMIR (Dokuz Eylül University Multimedia Information Retrieval) research team to the Share/CLEF eHealth 2014. This year, we participated to task 3a: monolingual user-centered health information retrieval. In this task, we focused to apply query expansion techniques selectively to some queries to improve(More)
In this paper, we compare the performance of different lemmatization approaches for information retrieval over Turkish text collection. A lemma is simply the "dictionary form" of a word and lemmatization is the process of determining the lemma for a given word where different inflected forms of a word can be analyzed as a single item. We compared three(More)
This paper present the details of participation of DEMIR (Dokuz Eylul University Multimedia Information Retrieval) research team to TREC 2011 Medical Records track. In this study, our aim is to index and retrieve medical terms and term phrases in medical text archives. We searched medical terms and term phrases with using UMLS which is a metathesaurus about(More)
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