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    Wyświetlanie 1-8 z 8
    Tytuł:
    Fiber-optic accelerometer based on a modal interferometer using a thin-core fiber
    Autorzy:
    Wang, X
    Wu, X
    Li, S
    Ge, Q
    He, T
    Yu, B
    Powiązania:
    https://bibliotekanauki.pl/articles/174927.pdf
    Data publikacji:
    2015
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fiber-optic accelerometer
    modal interferometer
    thin-core fiber
    Opis:
    A compact fiber-optic accelerometer based on a modal interferometer, which is fabricated by misaligned splicing of a short section of a thin-core fiber between two sections of a standard single-mode fiber, is demonstrated experimentally. A spectrum analysis method is used to detect an acceleration signal rapidly. The experimental results show that the thin-core fiber-based fiber-optic accelerometer has a minimum detectable acceleration of 3.3×10–3g (g – gravitational acceleration), and a wide frequency response range from 10 to 1200 Hz. Moreover, the proposed accelerometer exhibits the advantages of low cost, simple structure and easy fabrication.
    Źródło:
    Optica Applicata; 2015, 45, 3; 317-325
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Diamond Model of Social Response within an Agent-Based Approach
    Autorzy:
    Nail, P.
    Sznajd-Weron, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/1398893.pdf
    Data publikacji:
    2016-05
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    87.23.Ge
    05.50.+q
    Opis:
    Models of social response concern the identification and delineation of possible responses to social pressure. Most models are based on simple one-dimensional conceptualizations of conformity and its alternatives even though more sophisticated models have been available for a number of years. The diamond model is perhaps the most refined of the two-dimensional formulations. It is particularly useful in building agent-based models of opinion dynamics because it gives clear and explicit operational definitions of basic types of social response. In fact, the diamond model is actually a ready recipe for a microscopic model of opinion dynamics. Moreover, it fits quite well Einstein's simple but no simpler strategy. In this work, we will present the logic of the diamond model as well as its implications for agent-based modeling.
    Źródło:
    Acta Physica Polonica A; 2016, 129, 5; 1050-1054
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Acoustic Phonon Activated and Assisted Tunnelling in Ge:Sb,P
    Autorzy:
    Žurauskienė, N.
    Dargys, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1952435.pdf
    Data publikacji:
    1996-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    71.70.Ms
    73.40.Gk
    79.70.+q
    Opis:
    The influence of lattice vibrations on the field ionization rate of shallow donors in germanium at low lattice temperatures is investigated experimentally and theoretically. The role played by acoustic phonons in the tunnelling of electrons from the ground donor level (phonon assisted tunnelling) and through the excited donor levels (phonon activated tunnelling) is considered. Both processes are shown to enhance the tunnelling rate.
    Źródło:
    Acta Physica Polonica A; 1996, 90, 5; 993-996
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Two Charge States of Sulphur in GaSb
    Autorzy:
    Dobaczewski, L.
    Kaczor, P.
    Karczewski, G.
    Poole, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1879480.pdf
    Data publikacji:
    1991-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    79.70.+q
    78.50.Ge
    71.55.Eq
    Opis:
    Results of the isothermal DLTS, photoconductivity, and photo-Hall measurements, showed that the sulphur-related center in GaSb, being a DX-type defect, has two charge states.
    Źródło:
    Acta Physica Polonica A; 1991, 79, 1; 133-136
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Phase Shifter Operation of the Azimuthally Magnetized Coaxial Ferrite Waveguide
    Autorzy:
    Georgieva-Grosse, M.
    Georgiev, G.
    Powiązania:
    https://bibliotekanauki.pl/articles/1419702.pdf
    Data publikacji:
    2012-07
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    02.60.Lj
    02.90.+p
    41.20.-q
    41.20.Jb
    85.70.Ge
    Opis:
    The terms for operation of the coaxial waveguide, entirely filled with azimuthally magnetized latching ferrite, as a digital nonreciprocal phase shifter for the normal $TE_{01}$ mode, are found. They are classified as physical, mathematical and functional ones. The physical prerequisites are drawn from the phase curves of the structure and specify the boundaries of the interval in which it produces differential phase shift for a given numerical equivalent of the modulus of off-diagonal ferrite permeability tensor element. The mathematical condition brings the parameters of configuration together with certain roots of its characteristic equation, derived in terms of complex Kummer and Tricomi confluent hypergeometric functions and with the related to them positive real $L_2(c,ρ,n)$ numbers (c=3, 0<ρ<1, n=1). The functional criteria determine the borders of the domain of phase shifter operation of the geometry. These are functions, defined for a fixed central conductor thickness which express in normalized form the impact of the guide radius on the phase shift at the cut-off frequencies and at the envelopes, denoting the termination of the phase curves for negative ferrite magnetization from the side of higher frequencies. The same are reckoned, employing iterative methods, consisting in a repeated numerical solution of the equation mentioned, followed by a computation of the guide radius and phase constant of the wave and are plotted graphically. The influence of the parameters of transmission line on the area referred to is analyzed.
    Źródło:
    Acta Physica Polonica A; 2012, 122, 1; 63-70
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Assessment of the Magnetostrictive Properties of the Selected Construction Steel
    Autorzy:
    Juś, A.
    Nowak, P.
    Gińko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/1032160.pdf
    Data publikacji:
    2017-04
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    75.80.+q
    75.50.Bb
    85.70.Ec
    07.55.Ge
    46.25.Hf
    Opis:
    The paper presents results of research on the effects of mechanical stresses on the magnetostrictive properties of 13CrMo4-5 steel. Measurements of stress dependence of magnetostriction fill the gap in the state of the art enabling description of relationships between stresses applied to the samples and its magnetoelastic and magnetostrictive properties. Performed studies represent the starting point for development of unified model of both Villari (magnetoelastic) and Joule (magnetostrictive) effects under stresses in steels. The formulated model will be the basis for the development of generalized methods of interpreting the results of non-destructive testing of the state of the internal stresses in steels based on these phenomena.
    Źródło:
    Acta Physica Polonica A; 2017, 131, 4; 1084-1086
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Prototype System for Marking and Identification οf Dangerous Spots for Vision Impaired People - Size and Shape Testing Marking the Dangerous Spots Zone
    Autorzy:
    Wiciak, J.
    Borkowski, B.
    Czajka, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/1490371.pdf
    Data publikacji:
    2012-01
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    41.20.-q
    46.40.-f
    07.55.Db
    07.55.Ge
    Opis:
    The article constitutes the continuation of the works realized under the research project entitled: "The development of the method for marking and identification of the spots dangerous and of special importance for vision impaired persons in the big city with use of the wave-vibration markers". The consideration included the identification of the object (human), identification of the direction of movement (double barrier), wireless data transmission with the information on the dangerous area, stimulation of the vibration signal and the feedback of the system. This article presents the result of choice of the optimal solution regarding the installation of the system on the selected objects of the urban engineering and also presents the concept of the method of modelling of the shape of the zone that is used for marking of the dangerous spot.
    Źródło:
    Acta Physica Polonica A; 2012, 121, 1A; A-024-A-027
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Bending, Impact Fracture Behavior and Characteristics of Stainless Steel Clad Plates with Different Rolling Temperature
    Autorzy:
    An, Q.
    Fan, K. Y.
    Ge, Y. F.
    Liu, B. X.
    He, J.
    Wang, S.
    Chen, C. X.
    Ji, P. G.
    Tolochko, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/2049433.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    stainless steel clad plate
    interface characteristics
    bending behavior
    impact morphologies
    delamination crack
    Opis:
    The interface characteristics, bending and impact behavior, as well as fracture characteristics of stainless steel clad plates fabricated by vacuum hot rolling at different rolling temperatures of 1100°C, 1200°C and 1300°C are investigated in detail. The interface bonding strength is gradually increased with the increasing rolling temperature due to the sufficient diffusion behavior of alloy element. The bending toughness and impact toughness are gradually decreased, while the bending strength increase with the increase of the rolling temperature, which is attributed to mechanisms of matrix softening and interface strengthening at high rolling temperature. Due to the weak interface at 1100°C, the bending and impact crack propagation path was displaced by delamination cracks, which in turn lead to reduction in stress intensity of the main crack, playing an effective role in toughening the stainless steel clad plates. Moreover, the impact fracture morphologies of clad plates show a typical ductile-brittle transition phenomenon, which is attributed to the matrix softening behavior with the increasing rolling temperature.
    Źródło:
    Archives of Metallurgy and Materials; 2021, 66, 1; 229-239
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-8 z 8

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