Now showing items 1-19 of 19

    • Approximation of multiserver retrial queues by means of generalized truncated models 

      Anisimov, V. V.; Artalejo, J. R. (Springer, 2002)
      It is well-known that an analytical solution of multiserver retrial queues is difficult and does not lead to numerical implementation. Thus, many papers approximate the original intractable system by the so-called ...
    • Binary sequences with low aperiodic autocorrelation for synchronization purposes 

      Kocabaş, Ş. E.; Atalar, Abdullah (IEEE, 2003)
      An evolutionary algorithm is used to find three sets of binary sequences of length 49-100 suitable for the synchronization of digital communication systems. Optimization of the sets are done by taking into consideration ...
    • Bounds on the capacity of random insertion and deletion-additive noise channels 

      Rahmati, M.; Duman, T. M. (IEEE, 2013)
      We develop several analytical lower bounds on the capacity of binary insertion and deletion channels by considering independent uniformly distributed (i.u.d.) inputs and computing lower bounds on the mutual information ...
    • Client-server synchronization and buffering for variable rate multimedia retrievals 

      Hui J.Y.; Karasan, E.; Li J.; Zhang, J. (1996)
      We consider the use of large buffers and feedback as a mechanism to maintain loosely coupled synchronization between a multimedia server and a client. The multimedia stream is modeled as a fluid flow through rate controlled ...
    • Communication scheme by using synchronized chaotic systems 

      morgül, Ö.; Feki, M. (IEEE, Piscataway, NJ, United States, 1996)
      A method to synchronize systems with chaotic behavior, in a master-slave configuration adapted to communication systems, is discussed. This work is motivated by the need for secure communication. In this method, the ...
    • A delay-tolerant asynchronous two-way-relay system over doubly-selective fading channels 

      Salim, A.; Duman, T. M. (Institute of Electrical and Electronics Engineers Inc., 2015)
      We consider design of asynchronous orthogonal frequency division multiplexing (OFDM) based diamond two-way-relay (DTWR) systems in a time-varying frequency-selective (doubly-selective) fading channel. In a DTWR system, two ...
    • Differential modulation for asynchronous two-way relay systems over frequency-selective fading channels 

      Salim, A.; Duman, T. M. (John Wiley and Sons Ltd, 2016)
      We propose two schemes for asynchronous multi-relay two-way relay (MR-TWR) systems in which neither the users nor the relays know the channel state information. In an MR-TWR system, two users exchange their messages with ...
    • Efficient parallel spatial subdivision algorithm for object-based parallel ray tracing 

      Aykanat, C.; İşler, V.; Özgüç, B. (Pergamon Press, 1994)
      Parallel ray tracing of complex scenes on multicomputers requires the distribution of both computation and scene data to the processors. This is carried out during preprocessing and usually consumes too much time and memory. ...
    • Model based anticontrol of discrete-tiime systems 

      Morgül, Ö. (Institute of Electrical and Electronics Engineers, 2003)
      We will consider a model-based approach for the anticontrol of some discrete-time systems. We first assume the existence of a chaotic model in an appropriate form. Then by using an appropriate control input we try to match ...
    • A model-based scheme for anticontrol of some chaotic systems 

      Morgül, Ö. (World Scientific Publishing, 2003)
      We consider a model-based approach for the anticontrol of some continuous time systems. We assume the existence of a chaotic model in an appropriate form. By using a suitable input, we match the dynamics of the controlled ...
    • A model-based scheme for anticontrol of some discrete-time chaotic systems 

      Morgül, Ö. (World Scientific, 2004)
      We consider a model-based approach for the anticontrol of some discrete-time systems. We first assume the existence of a chaotic model in an appropriate form. Then by using an appropriate control input we try to match the ...
    • Observer based chaotic message transmission 

      Morgül, Ö.; Solak, E.; Akgül, M. (World Scientific Publishing, 2003)
      We consider observer based synchronization of continuous-time chaotic systems. We present two message transmission schemes for such systems. The first one is based on chaotic masking and modulation, and the second one is ...
    • On the synchronization of logistic maps 

      Morgül, Ö. (Elsevier BV, 1998-10-26)
      We study the synchronization of two chaotic maps described by a logistic equation. We propose a new feedback term and show that the resulting system has some desired properties including exponential synchronization with ...
    • Progressive refinement radiosity on ring-connected multicomputers 

      Çapın, T. K.; Aykanat, C.; Özgüç, B. (Publ by ACM, New York, NY, United States, 1993)
      The progressive refinement method is investigated for parallelization on ring-connected multicomputers. A synchronous scheme, based on static task assignment, is proposed, in order to achieve better coherence during the ...
    • Study of encapsulated microbubble cluster based on association schemes perspective 

      Behnia S.; Yahyavi, M.; Habibpourbisafar, R.; Mottaghi, F. (Elsevier B.V., 2018)
      Ultrasound contrast agents have been recently utilized in therapeutical implementations for targeted delivery of pharmaceutical substances. Radial pulsations of a cluster of encapsulated microbubbles under the action of ...
    • A switching synchronization scheme for a class of chaotic systems 

      Morgül, Ö.; Akgül, M. (Elsevier, 2002)
      In this Letter, we propose an observer-based synchronization scheme for a class of chaotic systems. This class of systems are given by piecewise-linear dynamics. By using some properties of such systems, we give a procedure ...
    • Synchronization and chaotic masking scheme based on occasional coupling 

      Morgül, Ö. (American Physical Society, 2000)
      Synchronization and a related message transmission scheme using synchronized chaotic systems was presented for discrete-time systems. The scheme was based on occasional coupling of transmitter and receiver systems. The ...
    • Test case verification by model checking 

      Naik, K.; Sarikaya, B. (Kluwer Academic Publishers, 1993)
      Verification of a test case for testing the conformance of protocol implementations against the formal description of the protocol involves verifying three aspects of the test case: expected input/output test behavior, ...
    • Ultra-low timing-jitter passively mode-locked fiber lasers for long-distance timing synchronization 

      Ilday, F. Ö.; Winter, A.; Kim J.-W.; Chen, J.; Schmüser, P.; Schlarb, H.; Kärtner, F. X. (S P I E - International Society for Optical Engineering, 2006)
      One of the key challenges for the next-generation light sources such as X-FELs is to implement a timing stabilization and distribution system to enable ∼ 10 fs synchronization of the different RF and laser sources distributed ...