Now showing items 1-11 of 11

    • Analysis of Web search queries with very few or no results 

      Sarıgil, Erdem (Bilkent University, 2012)
      Nowadays search engines have significant impacts on people’s life with the rapid growth of World Wide Web. There are billions of web pages that include a huge amount of information. Search engines are indispensable tools ...
    • 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 ...
    • Cost-aware strategies for query result caching in Web search engines 

      Ozcan, R.; Altingovde, I. S.; Ulusoy, O. (Association for Computing Machinery, 2011)
      Search engines and large-scale IR systems need to cache query results for efficiency and scalability purposes. Static and dynamic caching techniques (as well as their combinations) are employed to effectively cache query ...
    • Efficient result caching mechanisms in search engines 

      Sazoğlu, Fethi Burak (Bilkent University, 2014)
      The performance of a search engine depends on its components such as crawler, indexer and processor. The query latency, accuracy and recency of the results play crucial role in determining the performance. High performance ...
    • 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 ...
    • Exploiting query views for static index pruning in web search engines 

      Altingovde I.S.; Ozcan, R.; Ulusoy Ö. (2009)
      We propose incorporating query views in a number of static pruning strategies, namely term-centric, document-centric and access-based approaches. These query-view based strategies considerably outperform their counterparts ...
    • 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 ...
    • A five-level static cache architecture for web search engines 

      Ozcan, R.; Altingovde, I. S.; Cambazoglu, B. B.; Junqueira, F. P.; Ulusoy, Ö. (Elsevier Ltd, 2012)
      Caching is a crucial performance component of large-scale web search engines, as it greatly helps reducing average query response times and query processing workloads on backend search clusters. In this paper, we describe ...
    • Longitudinal analysis of search engine query logs - temporal coverage 

      Yılmaz, Oğuz (Bilkent University, 2012)
      The internet is growing day-by-day and the usage of web search engines is continuously increasing. Main page of browsers started by internet users is typically the home page of a search engine. To navigate a certain web ...
    • 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 ...
    • Strategies for setting time-to-live values in result caches 

      Sazoglu, F. B.; Cambazoglu, B. B.; Ozcan, R.; Altingovde, I. S.; Ulusoy, Ö. (2013)
      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 ...