Now showing items 1-7 of 7

    • Characterizing, predicting, and handling web search queries that match very few or no results 

      Sarıgil, Erdem; Altıngövde, I. S.; Blanco, R.; Cambazoğlu, B. B.; Özcan, R.; Ulusoy, Özgür (John Wiley & Sons, 2018)
      A non‐negligible fraction of user queries end up with very few or even no matching results in leading commercial web search engines. In this work, we provide a detailed characterization of such queries and show that search ...
    • A financial cost metric for result caching 

      Sazoğlu, Fethi Burak; Cambazoğlu, B. B.; Özcan, R.; Altıngövde, I. S.; Ulusoy, Özgür (ACM, 2013-07-08)
      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 ...
    • How k-12 students search for learning?: analysis of an educational search engine log 

      Usta, Arif; Altıngövde, İsmail Şengör; Vidinli, İ. B.; Özcan, R.; Ulusoy, Özgür (ACM, 2014-07)
      In this study, we analyze an educational search engine log for shedding light on K-12 students' search behavior in a learning environment. We specially focus on query, session, user and click characteristics and compare ...
    • Improving educational web search for question-like queries through subject classification 

      Yılmaz, Tolga; Özcan, R.; Altıngövde, İ. Ş; Ulusoy, Özgür (Elsevier, 2019)
      Students use general web search engines as their primary source of research while trying to find answers to school-related questions. Although search engines are highly relevant for the general population, they may return ...
    • Re-finding behaviour in educational search 

      Usta, Arif; Altıngövde, İ. Ş.; Özcan, R.; Ulusoy, Özgür (Springer, Cham, 2019)
      One of the search tasks in Web search is repeat search behaviour to find out documents that users once visited, which is called re-finding. Although there have been several works in the context of general-purpose Web ...
    • Strategies for setting time-to-live values in result caches 

      Sazoğlu, Fethi Burak; Cambazoğlu, B. B.; Özcan, R.; Altıngövde, İsmail Şengör; Ulusoy, Özgür (ACM, 2013-10-11)
      In web query result caching, staleness of queries are often bounded via a time-to-live (TTL) mechanism, which expires the validity of cached query results at some point in time. In this work, we evaluate the performance ...
    • A “suggested” picture of web search in Turkish 

      Sarıgil, E.; Yılmaz, O.; Altıngövde, İ. Ş.; Özcan, R.; Ulusoy, Özgür (ACM, 2016-05)
      Although query log analysis provides crucial insights about Web users’ search interests, conducting such analyses is almost impossible for some languages, as large-scale and public query logs are quite scarce. In this ...