Recent Submissions

  • Analytic and asymptotic properties of Linnik's probability densities 

    Hayfavi, A.; Kotz, S.; Ostrovskii, I. V. (Elsevier, 1994)
    The analytic and asymptotic properties of the probability density Jin (:r:) introduced in 1953 by Ju. V. Linnik and defined by the characteristic function 1/(1 + It I"), 0 < n < 2, are studied. Expansions of Jin (:r:) ...
  • Square functions in ergodic theory 

    Jones, R. L.; Ostrovskii, I. V.; Rosenblatt, J. M. (Cambridge University Press, 1996)
    Given the usual averages in ergodic theory, let n1 ≤ n2 ≤ … and . There is a strong inequality ‖Sf‖2 ≤ 25‖f‖2 and there is a weak inequality m{Sf > λ} ≤ (7000/λ)‖f‖1. Related results and questions for other variants of ...
  • On vector invariants of the symmetric group 

    Stepanov, S. A. (Walter de Gruyter GmbH, 1996)
    The purpose of this paper is to give a proof of the results announced by the author [7] in 1982 on the algebraic independence over a field k of any non-degenerate system of mn distinct basis invariants in the ring k[x11 ...
  • Fibre products of hyperelliptic curves and geometric Goppa code 

    Stepanov, S. A.; Özbudak, F. (Walter de Gruyter GmbH, 1997)
    The purpose of this paper is to extend the results of the first author on construction of fairly long geometric Goppa codes over Fq (q = pv and v > I is even) with rather good parameters to the case of finite fields Fq ...
  • Codes on fibre products of hyperelliptic curves 

    Stepanov, S. A. (Walter de Gruyter GmbH, 1997)
    The purpose of this paper is to construct a new family of smooth projective curves over a finite field Fq with a lot of Fg-rational points. The genus in this family is considerably less than the number of rational points, ...
  • Polynomial invariants of finite groups over fields of prime characteristics 

    Stepanov, S. A. (Walter de Gruyter GmbH, 1999)
    Let R be a commutative ring with the unit element 1, and let G = Sn be the symmetric group of degree n 2'. 1. Let A~n denote the subalgebra of invariants of the polynomial algebra Arnn = R[x11 , ... ,x1n; ... ;xm1, ... ...
  • Vector invariants of symmetric groups in prime characteristic 

    Stepanov, S. A. (Walter de Gruyter GmbH, 2000)
    Let R be a commutative ring with the unit element 1 and Sn be the symmetric group of degree n 2::: 1. Let A~ denote the subalgebra of invariants of the polynomial algebra with respect to Sn, The classical result of H. ...
  • Determination of the J-groups of complex projective and lens spaces 

    Dibag, I. (Springer Netherlands, 2003)
    We determine completely the I-groups of complex projective and lens spaces by means of a set of generators and a complete set of relations.
  • Burst-mode Yb-doped fiber amplifier system optimized for low-repetition-rate operation 

    Kalaycıoğlu, H.; Akçaalan, Ö.; Yavaş, S.; Eldeniz, Y. B.; Ilday, F. Ö. (Optical Society of America, 2015)
    We report on the burst-mode operation of a polarization-maintaining Yb-doped multi-stage all-fiber amplifier capable of generating 10-pulse 100 ns long bursts of 400 μJ total energy. The corresponding average energy per ...
  • Cavity formation in split ring resonators 

    Caglayan, H.; Bulu, I.; Loncar, M.; Ozbay, E. (Elsevier BV, 2008-12)
    We report that it is possible to obtain a cavity structure by the deformation of a unit cell of an split ring resonator (SRR) structure. We presented the Q-factor of the cavity resonance as 192 for an SRR-based single ...
  • Codes on fibre products of Artin-Schreier curves 

    Stepanov, S.; Shalalfeh, M. H. (Walter de Gruyter GmbH, 2001)
    The purpose of this paper is to construct a new family of smooth projective curves over a finite field Fq with many Fq-rational points using fibre products of Artin-Schreier curves. We show that for any curve X in this ...
  • Graphene-enabled electrically controlled terahertz spatial light modulators 

    Kakenov, N.; Takan, T.; Ozkan, V. A.; Balcı, O.; Polat, E. O.; Altan, H.; Kocabas, C. (Optical Society of America, 2015-05-01)
    In this Letter, we demonstrate a broadband terahertz (THz) spatial light modulator using 5×5 arrays of large area graphene supercapacitors. Our approach relies on controlling spatial charge distribution on a passive matrix ...
  • Visible photoluminescence from thin films of SiOx prepared by low-temperature plasmachemical deposition 

    Timofeev, F. N.; Mikhailov, V. N.; Timofeev, I. N.; Aydinli, A.; Suzer, S.; Ellialtioglu, R.; Gure, M.; Turkoglu, K. (American Institute of Physics, 1994-07-26)
  • Investigation of thin films SiO2 obtained by low temperature plasmachemical deposition 

    Timofeev, F. N.; Bozkurt, K.; Gure, M.; Aydinli, A.; Suzer, S.; Ellialtioglu, R.; Turkoglu, K. (American Institute of Physics, 1994-07-26)
  • The discrete fractional Fourier transform and Harper's equation 

    Barker, L. (London Mathematical Society, 2000)
    It is shown that the discrete fractional Fourier transform recovers the continuum fractional Fourier transform via a limiting process whereby inner products are preserved.
  • The number of blocks with a given defect group 

    Barker, L. (London Mathematical Society, 1997)
    Given a P-subgroup P of a finite group G, we express the number of P-blocks of G with defect group P as the /?-rank of a symmetric integer matrix indexed by the N (P) / P-conjugacy classes in PC(P)/P. We obtain ...
  • Some results related to the Laplacian on vector fields 

    Erkekoğlu, Fazilet; Kupeli, D. N.; Unal, B. (Institute of Mathematics, University of Debrecen, Hungary., 2006)
    A characterization of Euclidean spheres out of connected, compact, Einstein Riemannian manifolds of constant scalar curvature is made by a characterization of a vector field with an eigenvalue equation for the Laplacian ...
  • Probing dynamics of surface structures using x-ray photoelectron spectroscopy 

    Sezen, H.; Suzer, S. (2012)
    By incorporating laser illumination, and/or by application of electrical square-wave pulses to the sample, X-ray photoelectron spectroscopy is utilized to probe the dynamics of the surface structures in the range of 10-3 ...
  • Multifunctional integrated photonic switches 

    Demir, H. M.; Sabnis, V. A.; Fidaner, O.; Zheng, J.-F.; Harris, J. S.; Miller, D. A. B. (Institute of Electrical and Electronics Engineers, 2005)
    Traditional optical-electronic-optical (o-e-o) conversion in today’s optical networks requires cascading separately packaged electronic and optoelectronic chips and propagating high-speed electrical signals through and ...
  • FRET-LEDs involving colloidal quantum dot nanophosphors 

    Nizamoğlu, S.; Sari, E.; Baek, J. H.; Lee, I. H.; Sun, X. W.; Demir, H. V. (Webcom Communications, 2010)
    Semiconductor nanocrystal quantum dots (NQD) with their narrow and tuneable emission are promising candidates to serve as color convertors integrated on light-emitting diodes (LEDs). The use of nonradiative energy transfer, ...

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