Now showing items 21-34 of 34

    • Non-linear pricing by convex duality 

      Pınar, M. Ç. (Elsevier, 2015)
      We consider the pricing problem of a risk-neutral monopolist who produces (at a cost) and offers an infinitely divisible good to a single potential buyer that can be of a finite number of (single dimensional) types. The ...
    • On probability of success in linear and differential cryptanalysis 

      Selçuk, A. A. (Springer New York LLC, 2008-01)
      Despite their widespread usage in block cipher security, linear and differential cryptanalysis still lack a robust treatment of their success probability, and the success chances of these attacks have commonly been estimated ...
    • Optimal channel switching in the presence of stochastic signaling 

      Dulek, B.; Varshney P.K.; Tutay, Mehmet Emin; Gezici, Sinan (IEEE, 2013)
      Optimal channel switching and detector design is studied for M-ary communication systems in the presence of stochastic signaling, which facilitates randomization of signal values transmitted for each information symbol. ...
    • Optimal stochastic parameter design for estimation problems 

      Soganci, H.; Gezici, Sinan; Arıkan, Orhan (Institute of Electrical and Electronics Engineers, 2012)
      In this study, the aim is to perform optimal stochastic parameter design in order to minimize the cost of a given estimator. Optimal probability distributions of signals corresponding to different parameters are obtained ...
    • Real-space condensation in a dilute Bose gas at low temperature 

      Kulik, I. O. (Natsional'na Akademiya Nauk Ukrainy, 2001)
      We show with a direct numerical analysis that a dilute Bose gas in an external potential - which is choosen for simplicity as a radial parabolic well - undergoes at certain temperature Tc a phase transition to a state ...
    • Reconstruction of the polarization distribution of the Rice-Mele model 

      Yahyavi, M.; Hetényi, B. (American Physical Society, 2017)
      We calculate the gauge-invariant cumulants (and moments) associated with the Zak phase in the Rice-Mele model. We reconstruct the underlying probability distribution by maximizing the information entropy and applying the ...
    • Short-time Fourier transform: two fundamental properties and an optimal implementation 

      Durak, L.; Arıkan, Orhan (IEEE, 2003)
      Shift and rotation invariance properties of linear time-frequency representations are investigated. It is shown that among all linear time-frequency representations, only the short-time Fourier transform (STFT) family with ...
    • A spatial data model for remote sensing image retrieval 

      Akçay, H. Gökhan; Aksoy, Selim (IEEE, 2013)
      Given a query region, our aim is to discover and retrieve regions with similar spatial arrangement and characteristics in other areas of the same large image or in other images. A Markov random field is constructed by ...
    • Stochastic resonance in binary composite hypothesis-testing problems in the Neyman-Pearson framework 

      Bayram, S.; Gezici, Sinan (Elsevier, 2012-02-20)
      Performance of some suboptimal detectors can be enhanced by adding independent noise to their inputs via the stochastic resonance (SR) effect. In this paper, the effects of SR are studied for binary composite hypothesis-testing ...
    • Theoretical investigation on exact blind channel and input sequence estimation 

      Özdemir, A. K.; Arıkan, Orhan (IEEE, Piscataway, NJ, United States, 1999)
      Recent work on fractionally spaced blind equalizers have shown that it is possible to exactly identify the channel and its input sequence from the noise-free channel outputs. However, the obtained results are based on a ...
    • Three management policies for a resource with partition constraints 

      Alanyalı, M. (Cambridge University Press, 1999)
      Management of a bufferless resource is considered under non-homogeneous demand consisting of one-unit and two-unit requests. Two-unit requests can be served only by a given partition of the resource. Three simple admission ...
    • Towards heuristic algorithmic memory 

      Özkural, Eray (Springer, Berlin, Heidelberg, 2011)
      We propose a long-term memory design for artificial general intelligence based on Solomonoff's incremental machine learning methods. We introduce four synergistic update algorithms that use a Stochastic Context-Free Grammar ...
    • Univariate X̄ control charts for individual characteristics in a multinormal model 

      Serel, D. A.; Moskowitz, H.; Tang, J. (Taylor & Francis, 2000)
      The early work on multivariate statistical process control was built upon Hotelling's T2 control chart which was developed to simultaneously monitor the means of correlated quality variables. This chart, however, has a ...
    • Vortices in trapped boson-fermion mixtures 

      Taşgin, M. E.; Subaşi, A. L.; Oktel, M. Ö.; Tanatar, Bilal (Springer, 2005)
      We consider a trapped system of atomic boson-fermion mixture with a quantized vortex. We investigate the density profiles of bosonic and fermionic components as functions of the boson-boson and boson-fermion short-range ...