Browsing by Keywords "Database systems"

Now showing items 1-20 of 45

    • 2-D adaptive prediction based Gaussianity tests in microcalcification detection 

      Gürcan, M. Nafi; Yardımcı, Yasemin; Çetin, A. Enis (SPIE, 1998-01)
      With increasing use of Picture Archiving and Communication Systems (PACS), Computer-aided Diagnosis (CAD) methods will be more widely utilized. In this paper, we develop a CAD method for the detection of microcalcification ...

    • Adaptive schemes for location update generation in execution location-dependent continuous queries 

      Lam, Kam-Yiu; Ulusoy, Özgür (Elsevier Inc., 2006-04)
      An important feature that is expected to be owned by today's mobile computing systems is the ability of processing location-dependent continuous queries on moving objects. The result of a location-dependent query depends ...

    • Algorithms for effective querying of compound graph-based pathway databases 

      Doğrusöz, Uğur; Çetintaş, Ahmet; Demir, Emek; Babur, Özgün (BioMed Central Ltd., 2009-11-16)
      Background: Graph-based pathway ontologies and databases are widely used to represent data about cellular processes. This representation makes it possible to programmatically integrate cellular networks and to investigate ...

    • Analysis of concurrency control protocols for real-time database systems 

      Ulusoy, Özgür (Elsevier, 1998)
      This paper provides an approximate analytic solution method for evaluating the performance of concurrency control protocols developed for real-time database systems (RTDBSs). Transactions processed in a RTDBS are associated ...

    • Automatic detection of salient objects and spatial relations in videos for a video database system 

      Sevilmiş, T.; Baştan M.; Güdükbay, Uğur; Ulusoy, Özgür (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 ...

    • Automatic image captioning 

      Pan J.-Y.; Yang H.-J.; Duygulu, Pınar; Faloutsos, C. (2004)
      In this paper, we examine the problem of automatic image captioning. Given a training set of captioned images, we want to discover correlations between image features and keywords, so that we can automatically find good ...

    • Automatic multimedia cross-modal correlation discovery 

      Pan, J.-Y.; Yang, H.-J.; Faloutsos, C.; Duygulu, Pınar (ACM, 2004-08)
      Given an image (or video clip, or audio song), how do we automatically assign keywords to it? The general problem is to find correlations across the media in a collection of multimedia objects like video clips, with colors, ...

    • Automatic performance evaluation of Web search engines 

      Can, F.; Nuray, R.; Sevdik, A. B. (Elsevier, 2004)
      Measuring the information retrieval effectiveness of World Wide Web search engines is costly because of human relevance judgments involved. However, both for business enterprises and people it is important to know the most ...

    • Automatic Ranking of Retrieval Systems in Imperfect Environments 

      Nuray, Rabia; Can, Fazlı (ACM, 2003-07-08)
      The empirical investigation of the effectiveness of information retrieval (IR) systems requires a test collection, a set of query topics, and a set of relevance judgments made by human assessors for each query. Previous ...

    • Bilkent University Multimedia Database Group at TRECVID 2008 

      Küçüktunç, Onur; Baştan, Muhammet; Güdükkbay, Uğur; Ulusoy, Özgür (National Institute of Standards and Technology, 2008-11)
      Bilkent University Multimedia Database Group (BILMDG) participated in two tasks at TRECVID 2008: content-based copy detection (CBCD) and high-level feature extraction (FE). Mostly MPEG-7 [1] visual features, which are also ...

    • BilVideo: Design and implementation of a video database management system 

      Dönderler, M. E.; Şaykol, E.; Arslan, U.; Ulusoy, Özgür; Güdükbay, Uğur (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, ...

    • The BioPAX community standard for pathway data sharing 

      Demir, Emek; Cary, M. P.; Paley, S.; Fukuda, K.; Lemer, C.; Vastrik, I.; Wu, G.; D'Eustachio, P.; Schaefer, C.; Luciano, J.; Schacherer, F.; Martinez-Flores, I.; Hu, Z.; Jimenez-Jacinto, V.; Joshi-Tope, G.; Kandasamy, K.; Lopez-Fuentes, A. C.; Mi, H.; Pichler, E.; Rodchenkov, I.; Splendiani, A.; Tkachev, S.; Zucker, J.; Gopinath, G.; Rajasimha, H.; Ramakrishnan, R.; Shah, I.; Syed, M.; Anwar, N.; Babur, Özgün; Blinov, M.; Brauner, E.; Corwin, D.; Donaldson, S.; Gibbons, F.; Goldberg, R.; Hornbeck, P.; Luna, A.; Murray-Rust, P.; Neumann, E.; Reubenacker, O.; Samwald, M.; Iersel, Martijn van; Wimalaratne, S.; Allen, K.; Braun, B.; Whirl-Carrillo, M.; Cheung, Kei-Hoi; Dahlquist, K.; Finney, A.; Gillespie, M.; Glass, E.; Gong, L.; Haw, R.; Honig, M.; Hubaut, O.; Kane, D.; Krupa, S.; Kutmon, M.; Leonard, J.; Marks, D.; Merberg, D.; Petri, V.; Pico, A.; Ravenscroft, D.; Ren, L.; Shah, N.; Sunshine, M.; Tang R.; Whaley, R.; Letovksy, S.; Buetow, K. H.; Rzhetsky, A.; Schachter, V.; Sobral, B. S.; Doğrusöz, Uğur; McWeeney, S.; Aladjem, M.; Birney, E.; Collado-Vides, J.; Goto, S.; Hucka, M.; Novère, Nicolas Le; Maltsev, N.; Pandey, A.; Thomas, P.; Wingender, E.; Karp, P. D.; Sander, C.; Bader, G. D. (Nature Publishing Group, 2010-09)
      Biological Pathway Exchange (BioPAX) is a standard language to represent biological pathways at the molecular and cellular level and to facilitate the exchange of pathway data. The rapid growth of the volume of pathway ...

    • Coding of fingerprint images using binary subband decomposition and vector quantization 

      Gerek, Ömer N.; Çetin, A. Enis (SPIE, 1998-01)
      In this paper, compression of binary digital fingerprint images is considered. High compression ratios for fingerprint images is essential for handling huge amount of images in databases. In our method, the fingerprint ...

    • Computer aided frequency planning for the radio and TV broadcasts 

      Altıntaş, Ayhan; Ocalı, O.; Topçu, Satılmış; Tanyer, S. G.; Köymen, Hayrettin (Institute of Electrical and Electronics Engineers, 1996-06)
      The frequency planning of the VHF and UHF broadcasts in Turkey is described. This planning is done with the aid of computer databases and digital terrain map. The frequency offset is applied whenever applicable to increase ...

    • Constrained min-cut replication for K-way hypergraph partitioning 

      Yazici V.; Aykanat, Cevdet (Institute for Operations Research and the Management Sciences (I N F O R M S), 2014)
      Replication is a widely-used technique in information retrieval and database systems for providing fault tolerance and reducing parallelization and processing costs. Combinatorial models based on hypergraph partitioning ...

    • A database model for querying visual surveillance videos by integrating semantic and low-level features 

      Şaykol, Ediz; Güdükbay, Uğur; Ulusoy, Özgür (Springer, Berlin, Heidelberg, 2005)
      Automated visual surveillance has emerged as a trendy application domain in recent years. Many approaches have been developed on video processing and understanding. Content-based access to surveillance video has become a ...

    • Distributed block formation and layout for disk-based management of large-scale graphs 

      Yaşar, A.; Gedik, B.; Ferhatosmanoğlu, H. (Springer, 2017)
      We are witnessing an enormous growth in social networks as well as in the volume of data generated by them. An important portion of this data is in the form of graphs. In recent years, several graph processing and management ...

    • Effective use of space for pivot-based metric indexing structures 

      Çelik, Cengiz (IEEE, 2008-04)
      Among the metric space indexing methods, AESA is known to produce the lowest query costs in terms of the number of distance computations. However, its quadratic construction cost and space consumption makes it infeasiblefor ...

    • Generating time-varying road network data using sparse trajectories 

      Eser, Elif; Kocayusufoğlu, F.; Eravci, Bahaedd; Ferhatosmanoglu, Hakan; Larriba-Pey, J. L. (IEEE, 2016-12)
      While research on time-varying graphs has attracted recent attention, the research community has limited or no access to real datasets to develop effective algorithms and systems. Using noisy and sparse GPS traces from ...

    • HandVR: a hand-gesture-based interface to a video retrieval system 

      Genç, S.; Baştan M.; Güdükbay, Uğur; Atalay, V.; Ulusoy, Özgür (Springer U K, 2015)
      Using one’s hands in human–computer interaction increases both the effectiveness of computer usage and the speed of interaction. One way of accomplishing this goal is to utilize computer vision techniques to develop ...