Now showing items 955-974 of 1361

    • Performance of query processing implementations in ranking-based text retrieval systems using inverted indices 

      Cambazoglu, B. B.; Aykanat, C. (Elsevier Ltd, 2006-07)
      Similarity calculations and document ranking form the computationally expensive parts of query processing in ranking-based text retrieval. In this work, for these calculations, 11 alternative implementation techniques are ...
    • Permuting sparse rectangular matrices into block-diagonal form 

      Aykanat, C.; Pınar, A.; Çatalyürek Ü. V. (SIAM, 2004)
      We investigate the problem of permuting a sparse rectangular matrix into block-diagonal form. Block-diagonal form of a matrix grants an inherent parallelism for solving the deriving problem, as recently investigated in the ...
    • Person search made easy 

      İkizler, Nazlı; Duygulu, Pınar (Springer, Berlin, Heidelberg, 2005)
      In this study, we present a method to extensively reduce the number of retrieved images and increase the retrieval performance for the person queries on the broadcast news videos. A multi-modal approach which integrates ...
    • PETAL: a fully distributed location service for wireless ad hoc networks 

      Ilkhechi, A. R.; Korpeoglu, I.; Güdükbay U.; Ulusoy, Ö. (Academic Press, 2017)
      Location service is an essential prerequisite for mobile wireless ad hoc networks (MANETs) in which the underlying routing protocol leverages physical location information of sender and receiver nodes. Fulfillment of this ...
    • PetaShare: A reliable, efficient and transparent distributed storage management system 

      Kosar, T.; Akturk I.; Balman, M.; Wang X. (2011)
      Modern collaborative science has placed increasing burden on data management infrastructure to handle the increasingly large data archives generated. Beside functionality, reliability and availability are also key factors ...
    • PHR: A parallel hierarchical radiosity system with dynamic load balancing 

      Sinop, A.; Abacı, T.; Akkuş Ü.; Gürsoy, A.; Güdükbay U. (Springer, 2005)
      In this paper, we present a parallel system called PHR for computing hierarchical radiosity solutions of complex scenes. The system is targeted for multi-processor architectures with distributed memory. The system evaluates ...
    • Physically-based simulation of hair strips in real-time 

      Taşkıran, Hasan Dogu; Güdükbay, Uğur (UNION Agency - Science Press, 2005)
      In this paper, we present our implementation of physically-based simulation of hair strips. We used a mass-spring model followed by a hybrid approach where particle systems and the method of clustering of hair strands are ...
    • Piecewise-planar 3D reconstruction in rate-distortion sense 

      İmre, E.; Güdükbay, Uğur; Alatan, A. A. (IEEE, 2007-05)
      In this paper, a novel rate-distortion optimization inspired 3D piecewise-planar reconstruction algorithm is proposed. The algorithm refines a coarse 3D triangular mesh, by inserting vertices in a way to minimize the ...
    • Pipelined fission for stream programs with dynamic selectivity and partitioned state 

      Gedik, B.; Özsema, H. G.; Öztürk, Ö. (Academic Press, 2016)
      There is an ever increasing rate of digital information available in the form of online data streams. In many application domains, high throughput processing of such data is a critical requirement for keeping up with the ...
    • PocketDrive: A system for mobile control of desktop PC and its applications using PDAs 

      Yıldırım, Yenel; Körpeoğlu, İbrahim (IEEE, 2007-11)
      Today, consumer electronic devices and PCs are inevitable parts of our daily life. Controlling those devices remotely is an important aspect of the technology. We have already universal remote control devices for controlling ...
    • Polyphase adaptive filter banks for subband decomposition 

      Gerek, Ömer N.; Çetin, Ahmet Enis (IEEE, 1998-05-06)
      Subband decomposition is widely used in signal processing applications including image and speech compression. In most practical cases, the goal is to obtain subband signals that are suitable for data compression. In this ...
    • Pose sentences: a new representation for action recognition using sequence of pose words 

      Hatun, Kardelen; Duygulu, Pınar (IEEE, 2008-12)
      We propose a method for recognizing human actions in videos. Inspired from the recent bag-of-words approaches, we represent actions as documents consisting of words, where a word refers to the pose in a frame. Histogram ...
    • Power efficient data gathering and aggregation in wireless sensor networks 

      Tan, H. Ö.; Körpeoǧlu, İ. (Association for Computing Machinery, 2003)
      Recent developments in processor, memory and radio technology have enabled wireless sensor networks which are deployed to collect useful information from an area of interest The sensed data must be gathered and transmitted ...
    • The power of physical representations 

      Akman, V.; ten Hagen, P. J. W. (AAAI Press, 1989)
      Commonsense reasoning about the physical world, as exemplified by 'Iron sinks in water' or 'If a ball is dropped it gains speed,' will be indispensable in future programs. We argue that to make such predictions (namely, ...
    • Power-source-aware backbone routing in wireless sensor networks 

      Tekkalmaz, Metin; Körpeoğlu, İbrahim (IEEE, 2010-11)
      Due to the limited energy-source and mostly unattended nature of the wireless sensor networks, efficient use of energy has a critical importance on the lifetime of the applications accomplished by such networks. Although ...
    • Practical and realistic animation of cloth 

      Bayraktar, Serkan; Güdükbay, Uğur; Özgüç, Bülent (IEEE, 2007-05)
      In this paper, we propose a system for the practical animation of cloth materials. A mass spring based cloth model is used. Explicit time integration methods are used to solve the equations of motion. We update the spring ...
    • Practical threshold signatures with linear secret sharing schemes 

      Bozkurt, İlker Nadi; Kaya, Kamer; Selçuk, Ali Aydın (Springer, 2009-06)
      Function sharing deals with the problem of distribution of the computation of a function (such as decryption or signature) among several parties. The necessary values for the computation are distributed to the participating ...
    • A practitioner's guide for static index pruning 

      Altıngövde, İsmail Şengör; Özcan, Rıfat; Ulusoy, Özgür (Springer, 2009-04)
      We compare the term- and document-centric static index pruning approaches as described in the literature and investigate their sensitivity to the scoring functions employed during the pruning and actual retrieval stages. ...
    • Pragmatics in human-computer conversations 

      Saygin, A. P.; Cicekli, I. (Elsevier, 2002)
      This paper provides a pragmatic analysis of some human-computer conversations carried out during the past six years within the context of the Loebner Prize Contest, an annual competition in which computers participate in ...
    • Predicting optimal facility location without customer locations 

      Yilmaz, Emre; Elbaşı, Sanem; Ferhatosmanoğlu, Hakan (ACM, 2017-08)
      Deriving meaningful insights from location data helps businesses make better decisions. One critical decision made by a business is choosing a location for its new facility. Optimal location queries ask for a location to ...