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    Wyświetlanie 1-4 z 4
    Tytuł:
    A Poynting Vector Approach to the Study of Power Flow through a Transformer
    Autorzy:
    Todeschini, G.
    Emanuel, A. E.
    Powiązania:
    https://bibliotekanauki.pl/articles/262661.pdf
    Data publikacji:
    2007
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    power definitions
    power quality
    Poynting vector
    harmonics
    Opis:
    This work deals with the flow of the electromagnetic energy through an idealized single-phase transformer supplied with nonsinusoidal voltage and supplying a nonlinear load. The electromagnetic flux components of the energy that flows from primary to secondary as well as the flux of energy stored in and ejected from the dielectric space surrounding the windings are identified and quantified. The electromagnetic flux components are correlated to well known instantaneous powers. These powers are not clever mathematic expedients but correct expressions that mirror the actual physical phenomena and lead to a more realistic interpretation of apparent power and its resolution.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2007, 13, 1; 129-137
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The use of motion peculiarities of particles of the Rayleigh light scattering mechanism for defining the coherence properties of optical fields
    Autorzy:
    Zenkova, C
    Soltys, I
    Angelsky, P
    Powiązania:
    https://bibliotekanauki.pl/articles/173481.pdf
    Data publikacji:
    2013
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    degree of coherence
    nanoparticles
    Poynting vector
    light scattering
    Opis:
    The paper proposes an alternative possibility for using the motion dynamics of tested particles of the Rayleigh light-scattering mechanism for estimating the degree of coherence of mutually orthogonal fields. The velocity of nanoparticles motion in the inhomogeneous optical field is chosen as the measuring parameter for diagnostics. The direct connection between the velocity of nanoscale particle motion and the degree of coherence of interacting fields is analytically demonstrated.
    Źródło:
    Optica Applicata; 2013, 43, 2; s. 297-312
    0078-5466
    1899-7015
    Pojawia się w:
    Optica Applicata
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    New Surface-Plasmon-Polariton-Like Acoustic Surface Waves at the Interface Between Two Semi-Infinite Media
    Autorzy:
    Kiełczyński, Piotr
    Powiązania:
    https://bibliotekanauki.pl/articles/31340115.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czasopisma i Monografie PAN
    Tematy:
    shear horizontal acoustic waves
    surface plasmon polaritons
    phase velocity
    group velocity
    Poynting vector
    Opis:
    This paper presents theory of new shear horizontal (SH) acoustic surface waves that propagate along the interface of two semi-infinite elastic half-spaces, one of which is a conventional elastic medium and a second one an elastic metamaterial with a negative and frequency dependent shear elastic compliance. This new surface waves have only one transverse component of mechanical displacement, which has a maximum at the interface and decays exponentially with distance from the interface. Similar features are also shown by the acoustic shear horizontal Maerfeld-Tournois surface waves propagating at the interface of two semi-infinite elastic media due to the piezoelectric effect that should occur in at least one semi-space. The proposed new shear horizontal acoustic surface waves exhibit also strong formal similarities with the electromagnetic surface waves of the surface plasmon polariton (SPP) type, propagating along a metal-dielectric planar interface. In fact, the new shear horizontal elastic surface waves possess a large number of properties that are inherent for the SPP electromagnetic surface waves, such as strong subwavelength concentration of the wave field in the proximity of the guiding interface, low phase and group velocity etc. As a result, the new shear horizontal acoustic surface waves can find applications in sensors with extremely high sensitivity, employed in measurements of various physical parameters, such as viscosity of liquids, as well as in biosensors, chemosensors, or a near field acoustic microscopy (subwavelength imaging) and miniaturized devices of microwave acoustics.
    Źródło:
    Archives of Acoustics; 2022, 47, 3; 363-371
    0137-5075
    Pojawia się w:
    Archives of Acoustics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Convergence of Numbers of Synapses and Quantum Foci within Human Brain Space: Quantitative Implications of the Photon as the Source of Cognition
    Autorzy:
    Persinger, M. A.
    Powiązania:
    https://bibliotekanauki.pl/articles/412322.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    photons
    synapses
    Poynting Vector
    neuroquantum
    recoil energies
    Bohr nucleus substitution frequency
    consciousness-light field
    gravitational-photon equivalence
    Opis:
    Quantitative solutions involving classical methods indicated that the numbers of quantum foci within the human cerebrum are the same order of magnitude as the numbers of synapses in the cerebral cortices. The Bohr frequency for the magnitude of the quantum associated with the removal of one nucleus from another is within the range of the width of synapse (~1 μm) while the recoil energy from a rest mass photon is equivalent to the energy produced by the entire field of dynamic neurons per second. The intrinsic energy (10-20 J) associated with each action potential is similar to the gravitational potential energy from Planck’s mass applied across 1 μm. Both the endogenous cerebral magnetic field strength which is similar in magnitude to intergalactic intensities and the interaction between weak geomagnetic variations and the cerebrum’s electric dipole current are associated with photon flux densities in the order (10-11 W∙m-2) that have been measured in the laboratory. The perspective of the human cerebral volume as a field of foci of photon quanta offers different perspectives for the intrinsic nature of consciousness and cognition and their influence by phenomena from astronomical origins.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 11, 1; 59-66
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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