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Wydział Fizyki, Astronomii i Informatyki Stosowanej / Faculty of Physics, Astronomy and Informatics Przeglądanie wg tytułu

Repozytorium Uniwersytetu Mikołaja Kopernika

Wydział Fizyki, Astronomii i Informatyki Stosowanej / Faculty of Physics, Astronomy and Informatics Przeglądanie wg tytułu

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  • Drozdowski, Winicjusz; Brylew, Kamil; Wojtowicz, Andrzej J.; Kisielewski, Jarosław; Świrkowicz, Marek; Łukasiewicz, Tadeusz; de Haas, Johan T.M.; Dorenbos, Pieter (2014-05-26)
    (LuxY1-x)3Al5O12:Pr (x = 0.25, 0.50, 0.75) crystals have been grown by the Czochralski method and their scintillation properties have been examined. Compared to the well-respected LuAG:Pr scintillator, which has so extensively ...
  • Siejkowski, Hubert; Soida, Marian; Otmianowska-Mazur, Katarzyna; Hanasz, Michał; Bomans, Dominik J. (2011-01-12)
    Radio observations show that magnetic fields are present in dwarf irregular galaxies (dIrr) and its strength is comparable to that found in spiral galaxies. Slow rotation, weak shear and shallow gravitational potential are ...
  • Hanasz, Michał; Kowal, Grzegorz; Otmianowska-Mazur, Katarzyna; Lesch, Harald (2004-02-27)
    We present the first numerical model of the magnetohydrodynamical cosmic-ray (CR) driven dynamo of the type proposed by Parker (1992). The driving force of the amplification process comes from CRs injected into the galactic ...
  • Duch, Włodzisław (Wydawnictwo Poznańskiego Towarzystwa Przyjaciół Nauk, 2013)
    Agnozje wiążą się z niezdolnością do odczytania istotnych aspektów informacji z sygnałów płynących ze zmysłów, są więc trudnościami w przetwarzaniu informacji wstępującej (bot-tom-up) od zmysłów do obszarów skojarzeniowych. ...
  • Przegiętka, Krzysztof; Chruścińska, Alicja (Elsevier B.V., 2013)
    The aim of this work was to study the effect of the quality of optical bleaching on the results of OSL (Optically Stimulated Luminescence) dating method. The large aliquots of coarse quartz grains extracted from fluvial ...
  • Duch, Włodzisław; Szymański, Julian (Springer, 2012)
    An approach to the word sense disambiguation (WSD) relaying on the WordNet synsets is proposed. The method uses semantically tagged glosses to perform a process similar to the spreading activation in semantic network, creating ...
  • Erwiński, Krystian; Paprocki, Marcin; Grzesiak, Lech; Karwowski, Kazimierz; Wawrzak, Andrzej (2013-03-20)
    In computerized numerical control (CNC) systems, the communication bus between the controller and axis servo drives must offer high bandwidth, noise immunity, and time determinism. More and more CNC systems use real-time ...
  • Duch, Włodzisław (Wydawnictwo Uniwersytetu Warszawskiego, 2010)
    Architektury kognitywne (AK) są próbą stworzenia modeli komputerowych integrujących wiedzę o działaniu umysłu. Ich zadaniem jest implementacja konkretnych schematów działania funkcji poznawczych umożliwiająca testowanie ...
  • Duch, Włodzisław (2014-02-19)
    Analysis of dynamics of biologically motivated neural networks allows for studying non-linear processes responsible for cognitive functions and thus provides adequate language to understand complex mental processes, including ...
  • Duch, Włodzisław (2014-02-19)
    The autor tries to answer the questions: How can we understand neurodegenerative disease, such as autism, ADHD or epilepsy? Who is in the best position to do it? Observations: what do we know? Theories: do we understand ...
  • Piwiński, Mariusz (Wydawnictwo Naukowe UMK, 2013)
    Dynamiczny rozwój Internetu sprawił, iż na przestrzeni ostatnich lat usługi sieciowe stały się nieodzowną częścią naszego życia. Coraz częściej spotykamy się z sytuacjami, w których wiele spraw znacznie łatwiej i szybciej ...
  • Chruściński, Dariusz; Kossakowski, Andrzej; Młodawski, Krzysztof; Matsuoka, Takashi (2010)
    We analyze special class of bipartite states - so called Bell diagonal states. In particular we provide new examples of bound entangled Bell diagonal states and construct the class of entanglement witnesses diagonal in the ...
  • Chruściński, Dariusz; Kossakowski, Andrzej; Aniello, P.; Marmo, Giuseppe; Ventriglia, F. (2010-04-08)
    We analyze a class of dynamics of open quantum systems which is governed by the dynamical map mutually commuting at different times. Such evolution may be effectively described via spectral analysis of the corresponding ...
  • Sarbicki, Gniewomir; Chruściński, Dariusz (2012-11-05)
    Exposed positive maps in matrix algebras define a dense subset of extremal maps. We provide a class of indecomposable positive maps in the algebra of 2n x 2n complex matrices with n>1. It is shown that these maps are exposed ...
  • Chruściński, Dariusz; Kossakowski, Andrzej (2007-11-28)
    We construct a new class of positive indecomposable maps in the algebra of `d x d' complex matrices. These maps are characterized by the `weakest' positivity property and for this reason they are called atomic. This class ...
  • Drozdowski, Winicjusz; Wojtowicz, Andrzej J.; Brylew, Kamil; Łachmański, W.; Talik, E.; Szubka, M.; Kusz, J.; Guzik, A.; Balin, K.; Kisielewski, Jarosław; Świrkowicz, Marek; Pajączkowska, A. (IOP Science, 2017-02)
    Interior of Czochralski-grown (Lu,Y)AG:Pr crystals has been examined by means of several techniques, such as X-Ray Photoelectron Spectroscopy, X-Ray Diffraction, Time-of-Flight Secondary Ion Mass Spectrometry, and magnetic ...
  • Chruściński, Dariusz; Rutkowski, Adam (2011-01-30)
    We provide a multi-parameter family of 2-qudit PPT entangled states which generalizes the celebrated Horodecki state in 3 x 3. The entanglement of this family is identified via semidefinite programming based on "PPT symmetric ...
  • Chruściński, Dariusz; Kossakowski, Andrzej (2006-04-03)
    We construct a new class of PPT states for bipartite "d x d" systems. This class is invariant under the maximal commutative subgroup of U(d) and contains as special cases almost all known examples of PPT states. Theses ...
  • Chruściński, Dariusz; Kossakowski, Andrzej (2010-11-02)
    We provide a simple class of 2-qudit states for which one is able to formulate necessary and sufficient conditions for separability. As a byproduct we generalize well known construction provided by Horodecki et al. for ...