Now showing items 1-20 of 20

    • An analysis of manipulated information and respective alternative costs in information systems and in decision making structures 

      Güvenen O.; Öztürk, M.H. (International Institute of Informatics and Systemics, IIIS, 2006)
      Today Information Technologies create base for the most important decision support systems for the practices in academia, business and politics. The effectiveness and success of operations that are supported by information ...
    • Auction based scheduling for distributed systems 

      Zarifoglu, E.; Sabuncuoglu I. (2006)
      Businesses deal with huge databases over a geographically distributed supply network. When this is combined with scheduling and planning needs, it becomes too difficult to handle. Recently, Fast Consumer Goods sector tends ...
    • Automatic detection of salient objects and spatial relations in videos for a video database system 

      Sevilmiş, T.; Baştan M.; Güdükbay U.; Ulusoy, Ö. (Elsevier BV, 2008-10)
      Multimedia databases have gained popularity due to rapidly growing quantities of multimedia data and the need to perform efficient indexing, retrieval and analysis of this data. One downside of multimedia databases is the ...
    • A beam search algorithm to optimize robustness under random machine breakdowns and processing time variability 

      Goren, S.; Sabuncuoglu I. (2007)
      The vast majority of the machine scheduling research assumes complete information about the scheduling problem and a static environment in which scheduling systems operate. In practice, however, scheduling systems are ...
    • A bilevel uncapacitated location/pricing problem with Hotelling access costs in one-dimensional space 

      Arbib, C.; Pınar, M. Ç.; Tonelli, M. (International Conference on Information Systems, Logistics and Supply Chain, 2016)
      We formulate a spatial pricing problem as bilevel non-capacitated location: A leader first decides which facilities to open and sets service prices taking competing offers into account; then, customers make individual ...
    • BilVideo: Design and implementation of a video database management system 

      Dönderler, M. E.; Şaykol, E.; Arslan, U.; Ulusoy, Ö.; Güdükbay U. (Springer, 2005)
      With the advances in information technology, the amount of multimedia data captured, produced, and stored is increasing rapidly. As a consequence, multimedia content is widely used for many applications in today's world, ...
    • CiSE: a circular spring embedder layout algorithm 

      Dogrusoz, U.; Belviranli, M. E.; Dilek, A. (Institute of Electrical and Electronics Engineers, 2013)
      We present a new algorithm for automatic layout of clustered graphs using a circular style. The algorithm tries to determine optimal location and orientation of individual clusters intrinsically within a modified spring ...
    • Diffusion of geograpgic information system at municipalities in Istanbul 

      Çavur, M.; Özturan, M.; Karaduman, C.; Içli, A.B. (TMMOB Maden Muhendisleri Odasi, 2015)
      This study aims to develop a better understanding of diffusion of Geographic Information Systems within municipalities and examines the infrastructure of Istanbul municipalities and whether they are ready for this technology ...
    • E-museum: web-based tour and information system for museums 

      Baştanlar, Y.; Altingövde, I. S.; Aksay, A.; Alav, O.; Çavuş, Ö.; Yardımcı, Y.; Ulusoy, Ö.; Güdükbay U.; Çetin, E.; Akar, G. B.; Aksoy, S. (2006)
      A web-based system - consisting of data entrance, access and retrieval modules - is constructed for museums. Internet users that visit the e-museum, are able to view the written and visual information belonging to the ...
    • Effectiveness of information systems outsourcing: An exploratory case study 

      Uçar, Erkan; Bilgen, S. (IADIS, 2012)
      The objective of this research is to construct an assessment model for measuring the effectiveness of Information Systems (IS) outsourcing. "Lack of expertise" and "cost effectiveness" constitute the major points of ...
    • Empirical distributions of daily equity index returns : a comparison 

      Corlu, C. G.; Meterelliyoz, M.; Tiniç, M. (Elsevier Ltd, 2016)
      The normality assumption concerning the distribution of equity returns has long been challenged both empirically and theoretically. Alternative distributions have been proposed to better capture the characteristics of ...
    • Evaluation of a broadcast scheduling algorithm 

      Karakaya, M.; Ulusoy Ö. (Springer Verlag, 2001)
      One of the two main approaches of data broadcasting is pull- based data delivery. In this paper, we focus on the problem of scheduling data items to broadcast in such a pull-based environment. Previous work has shown that ...
    • A framework for applying the principles of depth perception to information visualization 

      Zeynep, C. Y.; Bulbul, A.; Capin, T. (Association for Computing Machinery, 2013)
      During the visualization of 3D content, using the depth cues selectively to support the design goals and enabling a user to perceive the spatial relationships between the objects are important concerns. In this novel ...
    • Keyphrase extraction through query performance prediction 

      Ercan, G.; Cicekli, I. (Sage Publications Ltd., 2012)
      Previous research shows that keyphrases are useful tools in document retrieval and navigation. While these point to a relation between keyphrases and document retrieval performance, no other work uses this relationship to ...
    • KiMPA: A kinematics-based method for polygon approximation 

      Şaykol, E.; Güleşir G.; Güdükbay, U.; Ulusoy Ö. (Springer Verlag, 2002)
      In different types of information systems, such as multimedia information systems and geographic information systems, object-based information is represented via polygons corresponding to the boundaries of object regions. ...
    • A layout algorithm for undirected compound graphs 

      Dogrusoz, U.; Giral, E.; Cetintas, A.; Civril, A.; Demir, E. (Elsevier Inc., 2009-03)
      We present an algorithm for the layout of undirected compound graphs, relaxing restrictions of previously known algorithms in regards to topology and geometry. The algorithm is based on the traditional force-directed layout ...
    • Realistic rendering and animation of a multi-layered human body model 

      Yeşil, M.Ş.; Güdükbay, U. (2006)
      A framework for realistic rendering of a multi-layered human body model is proposed in this paper. The human model is composed of three layers: skeleton, muscle, and skin. The skeleton layer, represented by a set of joints ...
    • A “suggested” picture of web search in Turkish 

      Sarıgil, E.; Yılmaz, O.; Altıngövde, İ. Ş.; Özcan, R.; Ulusoy, Ö. (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 ...
    • 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 ...
    • Wireless ATA: A new data 

      Ozler, S.; Korpeoglu I. (2005)
      This paper introduces a new data transport architecture and protocol for storage that is implemented on wireless devices and that can be accessed through a short-range wireless access technology such as Bluetooth or 802.11. ...