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    Wyświetlanie 1-12 z 12
    Tytuł:
    Coherence Properties of Coupled Chaotic Map Lattices
    Autorzy:
    Janowicz, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1492426.pdf
    Data publikacji:
    2011-12
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    05.45.Ra
    45.70.Qj
    03.75.Hh
    03.75.Nt
    Opis:
    Strong global correlations in the systems of coupled chaotic map lattices based on a modified logistic map are investigated. It is shown that, in the parameter range close to the edge of chaos as defined for an individual map, the systems exhibit off-diagonal long-range order and single-particle reduced density matrices defined in a natural way possess one strongly dominant eigenvalue. In addition, pattern formation [13] in the above systems has been investigated.
    Źródło:
    Acta Physica Polonica A; 2011, 120, 6A; A-114-A-118
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Explosion of Atom Clusters in a Free-Electron Intense Laser Pulse
    Autorzy:
    Rusek, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037285.pdf
    Data publikacji:
    2004-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.40.-c
    32.80.Rm
    42.50.Hz
    07.05.Tp
    Opis:
    The explosion of rare-gas atomic clusters induced by short, intense X-ray pulses generated by a free-electron laser is studied. A numerical approach for an explicitly time-dependent description of small to medium size clusters in 3D is developed within the Thomas-Fermi model. Such an approach, though strongly simplified in comparison to fully quantum-mechanical schemes, is nevertheless expected to yield a qualitatively correct description of the electronic and ionic dynamics of these systems, at a much lower computational cost.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 5; 425-436
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Anderson Localization of Electromagnetic Waves in Dielectric Media: Model Studies
    Autorzy:
    Rusek, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2044616.pdf
    Data publikacji:
    2006-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Fx
    42.25.Hz
    72.10.Fk
    78.20.Ci
    Opis:
    Anderson localization of electromagnetic waves in random arrays of dielectric cylinders confined within a planar metallic waveguide is studied. The disordered dielectric medium is modeled by a system of randomly distributed 2D electric dipoles. An effective theoretical approach based on the method of images is developed. A clear distinction between isolated localized waves (which exist in finite media) and the band of localized waves (which appears only in the limit of the infinite medium) is presented. The Anderson transition emerging in the limit of an infinite medium is observed both in finite size scaling analysis of transmission and in the properties of the spectra of some random matrices. The sound physical interpretation of the obtained results suggests deeper insight into the existing experimental and theoretical work.
    Źródło:
    Acta Physica Polonica A; 2006, 109, 1; 109-119
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dynamics of Argon Clusters in an Intense Laser Pulse: Bloch-Like Hydrodynamic Model
    Autorzy:
    Rusek, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2038167.pdf
    Data publikacji:
    2004-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    36.40.-c
    32.80.Rm
    42.50.Hz
    07.05.Tp
    Opis:
    The dynamics of small (<55 atoms) argon clusters ionized by an intense, infrared, femtosecond laser pulse is studied using a Bloch-like hydrodynamic model. Evolution of both free electrons and ions formed in the cluster explosion process is examined. Oscillations of the electron cloud in a rare-gas atomic cluster are described as a motion of a fluid obeying Bloch-like hydrodynamic equations. Our theoretical approach includes all possible ionization mechanisms: tunnel (or field) ionization both by an external laser field, and by an internal field due to the space-charge distribution inside the cluster, as well as electron-impact (or collisional) ionization. The results of our simulations are compared both with experimental findings and with predictions of other theoretical models.
    Źródło:
    Acta Physica Polonica A; 2004, 106, 1; 3-12
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Free Electrons Generation in the Interaction of Intense Laser Pulses with Atomic Clusters
    Autorzy:
    Rusek, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2041831.pdf
    Data publikacji:
    2005-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    32.80.-t
    36.40.Gk
    52.50.Jm
    Opis:
    Interaction of argon clusters with intense laser pulses is studied theoretically. Free electrons energy distribution is studied. Differences between infrared and vacuum ultraviolet frequency regimes are pointed out. Clear physical interpretation of the obtained results is given.
    Źródło:
    Acta Physica Polonica A; 2005, 107, 3; 473-478
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Optimization of Directional Antennas in Two-Dimensional Artificial Dielectrics
    Autorzy:
    Janowicz, M.
    Rusek, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037143.pdf
    Data publikacji:
    2004-03
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    41.20.Jb
    84.40.Ba
    42.25.Bs
    Opis:
    We investigate numerically the problem of optimization of directional characteristics of dipole antennas located inside, or in the vicinity of, photonic crystals or more general artificial dielectrics, made of very thin perfectly conducting wires. We concentrate on two-dimensional propagation. Simulated annealing is used to find the distribution of wires which optimizes the directional pattern. It is demonstrated that high directivity can be obtained for systems containing a very small number of elements provided that the size and shape of the unit cell as well as the position of the radiating source with respect to the crystal are optimized. Building up of the radiation pattern is also illustrated with the help of the wave-optical rays.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 3; 263-278
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Examples of Migration Matrices Models and their Performance in Credit Risk Analysis
    Autorzy:
    Grzybowska, U.
    Karwański, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1408978.pdf
    Data publikacji:
    2012-02
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.50.Ga
    87.55.N-
    02.10.Yn
    Opis:
    Credit risk models used in banks are based on probability models for occurrence of default. A vast class of the models used in practice (e.g., Credit Metrics) is based on the notion of intensity. In 1997 Jarrow applied Markov chain approach to analyze intensities. The key problem that arises is the selection of appropriate estimators. Within the Markov approach among the most frequently used estimators of a migration matrix are cohort and duration estimators. Migration matrices can also be obtained with help of statistical longitudinal models (GLMM) in which states (rating classes) in discrete time points are regarded as matched pairs. In this paper we compare Markov chain models and GLMM models and the influence of their application on bank portfolio evaluation.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 2B; B-40-B-46
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Smart metering – a brief overview of projects, benefits and applications
    Autorzy:
    Ząbkowski, T.
    Bator, M.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/94779.pdf
    Data publikacji:
    2012
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    smart metering
    smart grid
    measurement
    resources saving
    oszczędność zasobów
    Opis:
    Smart metering is a topic that recently has attracted much attention all over the world. Smart metering appears to be a remedy for rising prices of electricity, gas or water. The evidence from many project running in Europe and the USA showed that this technology is technically feasible and can generate the value added for the households and suppliers. In this paper we aim to systematize the knowledge of smart metering solutions, point out the benefits of smart metering and present a short overview of the SMEPI project led by Vedia S.A. in cooperation with GridPocket and SGGW.
    Źródło:
    Information Systems in Management; 2012, 1, 1; 72-83
    2084-5537
    2544-1728
    Pojawia się w:
    Information Systems in Management
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Light Localization in Left-Handed Media
    Autorzy:
    Rusek, M.
    Orłowski, A.
    Mostowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2047827.pdf
    Data publikacji:
    2007-10
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    03.65.Nk
    41.20.Jb
    72.10.Fk
    72.15.Rn
    Opis:
    Localized waves in disordered left-handed materials are studied using a generalized coupled-dipole model. Resonances in an open system consisting of randomly distributed electric and magnetic dipoles are investigated. A new type of long-lived resonance modes localized at the boundary of the system is found. They resemble evanescent waves responsible for a superfocusing phenomenon by a left-handed lens.
    Źródło:
    Acta Physica Polonica A; 2007, 112, 4; 673-680
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problems of visualization of digital images for the blind persons with special attention paid to business graphics
    Autorzy:
    Olejniczak, M.
    Śmiałowski, T.
    Chmielewski, L.
    Orłowski, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/94839.pdf
    Data publikacji:
    2013
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    non-visual presentation of images
    blind and visually impaired
    tactile interface
    business graphics
    prezentacja obrazów
    niewidomi i niedowidzący
    interfejs dotykowy
    Opis:
    Sight is the most important sense of a human. For the most of the society, the perception performed by the sight organ is perceived as something very natural. Reflection on life without the sight is not common, which slows down the technological development aiming at reducing the social exclusion of persons with sight disabilities. The dynamical development of advanced technologies does not provide solutions for all the cases of illness. However, many tools exist which allow people with visual disabilities to interact with the outside world. In most cases these tools allow only for the exchange of very basic information. We present some problems associated with the visualization of images for the blind, with the attention concentrated upon business graphics. We also give some propositions to enhance the level of non-visual perception of images with the use of specialized tactile equipment.
    Źródło:
    Information Systems in Management; 2013, 2, 4; 300-312
    2084-5537
    2544-1728
    Pojawia się w:
    Information Systems in Management
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Results on Gain-Loss Asymmetry for Stock Markets Time Series
    Autorzy:
    Grudziecki, M.
    Gnatowska, E.
    Karpio, K.
    Orłowski, A.
    Załuska-Kotur, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1812227.pdf
    Data publikacji:
    2008-09
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    89.65.Gh
    02.50.r
    89.90.+n
    Opis:
    A method called investment horizon approach was successfully used to analyze stock markets of many different countries. Here we apply a version of this method to study characteristics of the Polish Pioneer mutual funds. We decided to analyze Pioneer because of its longest involvement in investing on the Polish market. Moreover, it apparently manages the biggest amount of money among all similar institutions in Poland. We compare various types of Pioneer mutual funds, characterized by different financial instruments they invest in. Previously, investment horizon approach produced different characteristics of emerging markets as opposed to mature ones, providing a possible way to quantify stock market maturity. Here we generalize the above mentioned results for mutual funds of various types.
    Źródło:
    Acta Physica Polonica A; 2008, 114, 3; 569-574
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Light Propagation in a Magnetic Field: Random Green Matrix Approach
    Autorzy:
    Pinheiro, F. A.
    Rusek, M.
    Orłowski, A.
    van Tiggelen, B. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2037256.pdf
    Data publikacji:
    2004-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    42.25.Dd
    78.20.Ls
    Opis:
    We studied the spectral properties of the matrices describing multiple scattering of electromagnetic waves from randomly distributed point-like magneto-optically active scatterers under an external magnetic field B. We showed that the complex eigenvalues of these matrices exhibit some universal properties such as the self-averaging behavior of their real parts, as in the case of scatterers without magneto-optical activity. However, the presence of magneto-optically active scatterers is responsible for a striking particularity in the spectra of these matrices: the splitting of the values of the imaginary part of their eigenvalues. This splitting is proportional to the strength of the magnetic field and can be interpreted as a consequence of the Zeeman splitting of the energy levels of a single scatterer.
    Źródło:
    Acta Physica Polonica A; 2004, 105, 4; 339-347
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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