Now showing items 1-17 of 17

    • Analyzing Turkish e-government websites by eye tracking 

      Albayrak, D.; Çaģiltay, K. (IEEE Computer Society, 2013)
      Usability studies provide essential information about users' views and perceptions of efficiency, effectiveness and satisfaction of given online services. Nowadays, e-government web sites become popular. Therefore, there ...
    • Architecture of a grid-enabled Web search engine 

      Cambazoglu, B. B.; Karaca, E.; Kucukyilmaz T.; Turk, A.; Aykanat, C. (Elsevier Ltd, 2007)
      Search Engine for South-East Europe (SE4SEE) is a socio-cultural search engine running on the grid infrastructure. It offers a personalized, on-demand, country-specific, category-based Web search facility. The main goal ...
    • Characterizing web search queries that match very few or no results 

      Altingovde, I. S.; Blanco, R.; Cambazoglu, B. B.; Ozcan, R.; Sarigil, E.; Ulusoy, Ö. (2012)
      Despite the continuous efforts to improve the web search quality, a non-negligible fraction of user queries end up with very few or even no matching results in leading web search engines. In this work, we provide a detailed ...
    • Diversity and novelty in web search, recommender systems and data streams 

      Santos, R. L. T.; Castells, P.; Altingovde, I. S.; Can, F. (Association for Computing Machinery, 2014)
      This tutorial aims to provide a unifying account of current research on diversity and novelty in the domains of web search, recommender systems, and data stream processing.
    • Efficient community identification and maintenance at multiple resolutions on distributed datastores 

      Aksu, H.; Canim, M.; Chang, Yuan-Chi; Korpeoglu, I.; Ulusoy, Ö. (Elsevier BV, 2015)
      The topic of network community identification at multiple resolutions is of great interest in practice to learn high cohesive subnetworks about different subjects in a network. For instance, one might examine the ...
    • Exploiting interclass rules for focused crawling 

      Altingövde, I. S.; Ulusoy, Ö. (IEEE, 2004)
      A baseline crawler was developed at the Bilkent University based on a focused-crawling approach. The focused crawler is an agent that targets a particular topic and visits and gathers only a relevant, narrow Web segment ...
    • Exploiting navigational queries for result presentation and caching in Web search engines 

      Ozcan, R.; Altingovde, I. S.; Ulusoy, O. (John Wiley & Sons, Inc., 2011)
      Caching of query results is an important mechanism for efficiency and scalability of web search engines. Query results are cached and presented in terms of pages, which typically include 10 results each. In navigational ...
    • A financial cost metric for result caching 

      Sazoglu, F. B.; Cambazoglu, B. B.; Ozcan, R.; Altingovde, I. S.; Ulusoy, Ö. (2013)
      Web search engines cache results of frequent and/or recent queries. Result caching strategies can be evaluated using different metrics, hit rate being the most well-known. Recent works take the processing overhead of queries ...
    • Incorporating the surfing behavior of web users into PageRank 

      Ashyralyyev, S.; Cambazoglu, B. B.; Aykanat, C. (2013)
      In large-scale commercial web search engines, estimating the importance of a web page is a crucial ingredient in ranking web search results. So far, to assess the importance of web pages, two different types of feedback ...
    • Integrating social features into mobile local search 

      Kahveci, B.; Altıngövde, İ. S.; Ulusoy, Ö. (Elsevier Inc., 2016)
      As availability of Internet access on mobile devices develops year after year, users have been able to make use of search services while on the go. Location information on these devices has enabled mobile users to use local ...
    • A large-scale sentiment analysis for Yahoo! Answers 

      Kucuktunc, O.; Cambazoglu, B. B.; Weber, I.; Ferhatosmanoglu, H. (2012)
      Sentiment extraction from online web documents has recently been an active research topic due to its potential use in commercial applications. By sentiment analysis, we refer to the problem of assigning a quantitative ...
    • Metadata extraction from text in soccer domain 

      Gokturk, Z.O.; Cicekli, N.K.; Cicekli I. (2008)
      Event detection is a crucial part for soccer video searching and querying. The event detection could be done by video content itself or from a structured or semi structured text files gathered from sports web sites. In ...
    • Site-based dynamic pruning for query processing in search engines 

      Altingovde I.S.; Demir, E.; Can F.; Ulusoy Ö. (2008)
      Web search engines typically index and retrieve at the page level. In this study, we investigate a dynamic pruning strategy that allows the query processor to first determine the most promising websites and then proceed ...
    • SLIM: A scalable location-sensitive information monitoring service 

      Bamba, B.; Wu, K.-L.; Gedik, B.; Liu L. (IEEE Computer Society, 2013)
      Location-sensitive information monitoring services are a centerpiece of the technology for disseminating content-rich information from massive data streams to mobile users. The key challenges for such monitoring services ...
    • Timestamp-based result cache invalidation for web search engines 

      Alici, S.; Altingovde I.S.; Ozcan, R.; Cambazoglu, B.B.; Ulusoy O. (2011)
      The result cache is a vital component for efficiency of large-scale web search engines, and maintaining the freshness of cached query results is the current research challenge. As a remedy to this problem, our work proposes ...
    • Towards a quality service layer for Web 2.0 

      Schaal, M.; Davenport, D.; Cevik, A. H. (Springer, 2011)
      Despite the help of search engines and Web directories, identifying high quality content becomes increasingly difficult as the Internet gets ever more crowded with information. Prior approaches for filtering and searching ...
    • A web-site-based partitioning technique for reducing preprocessing overhead of parallel PageRank computation 

      Cevahir, A.; Aykanat, C.; Turk, A.; Cambazoglu, B.B. (2007)
      A power method formulation, which efficiently handles the problem of dangling pages, is investigated for parallelization of PageRank computation. Hypergraph-partitioning-based sparse matrix partitioning methods can be ...