Now showing items 41-60 of 168

    • Modification of Bragg-Williams approximation applied in Jackson's model of crystal growth 

      Izdebski, Marek (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      Results of Monte Carlo simulations for single-layer solid-fluid interface were compared with Bragg-Williams approximation, which describes the number of bonds between solid and fluid cells in Jackson's crystal growth model. ...
    • Active partition based medical image understanding with self-organised competitive spatch eduction 

      Pryczek, Michał; Tomczyk, Arkadiusz; Szczepaniak, Piotr (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      Medical Image Understanding is a recently defined semantic oriented image recognition task. Its specific requirements, highlighting complex characteristics of recognised objects as well as indispensable use of human-level ...
    • Growth velocities and sectorial and zonal distributions of impurities in crystals 

      Szurgot, Marian (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      Formulae for relative impurity content in various parts of a crystal have been derived and analysis of sectorial and zonal distributions of impurities conducted. Contribution of volume diffusion controlled crystal growth ...
    • Conductivity in cured epoxy resins containing a biphenyl unit 

      Włodarska, Magdalena; Izdebski, Marek; Bąk, Grzegorz; Mossety-Leszczak, Beata; Galina, Henryk (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      Conductivity of two epoxy matrices based on the same monomer was compared. The epoxy monomer had symmetric structure and contained the biphenyl group which induced additional phase transitions in the pure material. Two ...
    • Improving digital watermarking fidelity using fast neural network for adaptive wavelet synthesis 

      Stolarek, Jan; Lipiński, Piotr (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      This paper introduces a new adaptive algorithm for digital watermark embedding in wavelet domain. The proposed algorithm performs adaptive mother wavelet synthesis based on a low frequency component energy maximization. ...
    • Dielectric and flexoelectric deformations induced by ac electric field in insulating nematic layers 

      Derfel, Grzegorz; Buczkowska, Mariola; Guzowski, Jakub (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      The deformations of homeotropic nematic layers induced by ac electric field of frequency f were studied numerically. Two kinds of nematic liquid crystals with small negative dielectric anisotropy, Δε < 0, were considered: ...
    • The Gentzen sequent calculus in e-testing. Pt. 1: Foundations 

      Niewiadomski, Adam; Indrzejczak, Andrzej (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      Modern methods and trends in education, especially the so-called e-learning, are undeniably more and more popular and widely applied in recent years. The paper is focused on the subdomain of the e-learning area which is ...
    • The role of artificial intelligence, knowledge and wisdom in automatic image understanding 

      Szczepaniak, Piotr; Tadeusiewicz, Ryszard (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      In the paper, the roles of intelligence, knowledge, learning and wisdom are discussed in the context of image content understanding. The known model of automatic image understanding is extended by the role of learning. ...
    • Packet switching networks traffic prediction based on radial basis function neural network 

      Zaleski, Arkadiusz; Kacprzak, Tomasz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      New multimedia applications require Quality of Service support, which is still not successfully implemented in current packet-switched networks implementations. This paper presents a concept of neural network predictor, ...
    • Influence of strong flaxoelectric properties on deformations of nematic liquid layers induced by DC electric field 

      Buczkowska, Mariola; Machlowski, Michał (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      Deformations of nematic layers induced by electric field were studied numerically. The role of very strong flexoelectric properties was considered. The threshold voltages for deformations were calculated for nematics with ...
    • Effect of light beam deviation from Bragg angle on the intensity of light diffracted on acoustic wave 

      Pieszyński, Krzysztof (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2010)
      The paper describes the influence of the effect of light beam deviation from Bragg angle on the intensity of light diffracted on acoustic wave. The analysis was based on the results of numerical calculations. The calculations ...
    • Administration of access control in information systems using URBAC model 

      Poniszewska-Marańda, Aneta (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      Since the value of information is constantly growing more and more businesses are in need for information system to aid them with information gathering and processing. The most important issue that arises here is how to ...
    • Security of information in university eLearning systems 

      Grzybowski, Rafał (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      The increase in popularity of university eLearning platforms, supporting traditional methods of education, as well as new communication tools development, make the security issues of information stored in these systems ...
    • Microscopic studies of Al Haggounia 001 meteorite 

      Szurgot, Marian; Polański, Krzysztof; Kosiński, Janusz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      Elemental composition, mineral composition and microstructure of Al Haggounia 001 meteorite found in 2006 were studied by analytical electron microscopy. It was established that orthopyroxene dominated by enstatite ...
    • Modern regularization techniques for inverse modelling: a comparative study 

      Krawczyk-Stańdo, Dorota; Rudnicki, Marek; Stańdo, Jacek (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      Regularization techniques are used for computing stable solutions to ill-posed problems. The well-known form of regularization is that of Tikhonov in which the regularized solution is searched as a minimiser of the weighted ...
    • On properties of a lattice structure for a Wavelet Filter Bank Implementation 

      Stolarek, Jan (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      This paper presents concept of a lattice structure for parametrization and implementation of a Discrete Wavelet Transform. Theoretical properties of the lattice structure are discussed in detail. An algorithm for converting ...
    • Free and open software for applied statistics. A comparison and a case study in biometrics 

      Niewiadomska, Ewa; Niewiadomski, Adam (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      This article is intended to be a position paper on advantages of free and open software for statistics and its applications to biometrics and biostatistics. Especially, the authors focus on the R package viewed as a new ...
    • Thermal problems in arsenide VECSELs 

      Sokół, Adam K.; Sarzała, Robert (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      Different aspects of thermal management of GaAs-based vertical-external-cavity surface-emitting lasers (VECSELs) are described and analyzed by example of typical configurations of GaInNAs/GaAs multiple-quantum-well (MQW) ...
    • Reaction-diffusion problems with random parameters using the generalized stochastic finite difference method 

      Kamiński, Marcin (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      The main idea here is to demonstrate the new stochastic discrete computational approach consisting of the generalized stochastic perturbation technique based on the Taylor expansions of the random variables and, at the ...
    • Propagation of laser beam in air stream colliding with non streamlined obstacle 

      Klemm, Katarzyna; Pieszyński, Krzysztof; Rożniakowski, Kazimierz (Wydawnictwo Politechniki ŁódzkiejLodz University of Technology. Press, 2011)
      The paper presents measurements of refractive index structure constant Cn in the region of air inflow in vicinity of non streamlined obstacle (a model of a building) placed on a flat surface. Examinations were conducted ...