Now showing items 1-14 of 14

    • Abstract metaprolog engine 

      Cicekli, I. (Elsevier, 1998)
      A compiler-based meta-level system for MetaProlog language is presented. Since MetaProlog is a meta-level extension of Prolog, the Warren Abstract Machine (WAM) is extended to get an efficient implementation of meta-level ...
    • Automated construction of fuzzy event sets and its application to active databases 

      Saygin, Y.; Ulusoy, Ö. (IEEE, 2001)
      Fuzzy sets and fuzzy logic research aims to bridge the gap between the crisp world of math and the real world. Fuzzy set theory was applied to many different areas, from control to databases. Sometimes the number of events ...
    • BilVideo: a video database management system 

      Dönderler, M. E.; Şaykol, E.; Ulusoy, Ö.; Güdükbay U. (IEEE, 2003)
      The BilVideo video database management system provides integrated support for spatiotemporal and semantic queries for video. BilVideo can support any application with video data searching needs. It's query language provides ...
    • Content-based retrieval of historical Ottoman documents stored as textual images 

      Şaykol, E.; Sinop, A. K.; Güdükbay U.; Ulusoy, Ö.; Çetin, A. E. (IEEE, 2004)
      There is an accelerating demand to access the visual content of documents stored in historical and cultural archives. Availability of electronic imaging tools and effective image processing techniques makes it feasible to ...
    • Dealing with fuzziness in active mobile database systems 

      Saygın, Y.; Ulusoy, Ö.; Yazıcı, A. (Elsevier, 1999)
      Current needs of industry required the development of advanced database models like active mobile database systems. An active mobile database system can be designed by incorporation of triggering rules into a mobile computing ...
    • Error-tolerant retrieval of trees 

      Oflazer, K. (IEEE, 1997)
      We present an efficient algorithm for retrieving from a database of trees, all trees that differ from a given query tree by a small number additional or missing leaves, or leaf label changes. It has natural language ...
    • An evaluation of real-time transaction management issues in mobile database systems 

      Kayan, E.; Ulusoy, Ö. (Oxford University Press, 1999)
      A critical issue in mobile data management is to respond to real-time data access requirements of the supported application. However, it is difficult to handle real-time constraints in a mobile computing environment due ...
    • Exploiting data mining techniques for broadcasting data in mobile computing environments 

      Saygin, Y.; Ulusoy, Ö. (IEEE, 2002)
      Mobile computers can be equipped with wireless communication devices that enable users to access data services from any location. In wireless communication, the server-to-client (downlink) communication bandwidth is much ...
    • Graph visualization toolkits 

      Dogrusoz, U.; Feng, Q.; Madden, B.; Doorley, M.; Frick, A. (IEEE, 2002)
      The Graph Layout Toolkit and Graph Editor Toolkit, which provide a framework for graph visualization useful in a broad array of application areas are introduced. As such, an architectural overview of these tools is presented ...
    • Hypergraph models and algorithms for data-pattern-based clustering 

      Ozdal, M. M.; Aykanat, C. (Springer, 2004)
      In traditional approaches for clustering market basket type data, relations among transactions are modeled according to the items occurring in these transactions. However, an individual item might induce different relations ...
    • OBJECTIVE: A benchmark for object-oriented active database systems 

      Çetintemel, U.; Zimmermann, J.; Ulusoy, Ö.; Buchmann, A. (Elsevier, 1999)
      Although much work in the area of Active Database Management Systems (ADBMSs) has been done, it is not yet clear how the performance of an active DBMS can be evaluated systematically. In this paper, we describe the OBJECTIVE ...
    • Optimization of signature file parameters for databases with varying record lengths 

      Kocberber, S.; Can, F.; Patton, J. M. (Oxford University Press, 1999)
      For signature files we propose a new false drop estimation method for databases with varying record lengths. Our approach provides more accurate estimation of the number of false drops by considering the lengths of individual ...
    • An overview of regression techniques for knowledge discovery 

      Uysal, İ.; Güvenir, H. A. (Cambridge University Press, 1999)
      Predicting or learning numeric features is called regression in the statistical literature, and it is the subject of research in both machine learning and statistics. This paper reviews the important techniques and algorithms ...
    • Research issues in real-time database systems . Survey paper 

      Ulusoy, Ö. (Elsevier, 1995)
      Today's real-time systems are characterized by managing large volumes of data. Efficient database management algorithms for accessing and manipulating data are required to satisfy timing constraints of supported applications. ...