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    Wyświetlanie 1-5 z 5
    Tytuł:
    Change in entropy of the spinning black holes
    Autorzy:
    Mahto, D.
    Singh, A. S.
    Vineeta, K.
    Kumar, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/411895.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Event-horizon
    AGN
    Entropy & Energy
    Opis:
    Aims: To derive an expression for change in entropy of spinning black holes on the basis of the model for the energy of spinning black holes E BHs= KBHs R's ( Mahto et al. 2011a) & the model for entropy change δS bh = [wzór]δE ( Mahto et al. 2011b) and then calculate their values for different test spinning black holes. Study Design: Data for the mass of black holes have collected from the research paper entitled :Super massive Black Holes in Galactic Nuclei: Past Present & Future Research(2005), Space Science Reviews by L. Ferrarese & H. Ford and Black holes in Astrophysics(2005), New Journal Physics by R. Narayan. The data for black hole constant for spinning black holes (K BHs = 1.214x1044) is taken from the paper entitled: Study of Schwarzschild radius with reference to the spinning black holes. Bulletin of Pure and Applied Sciences (2011a). Place and Duration of Study: Department of Physics, Marwari College Bhagalpur and University Department of Physics, T.M.B.U. Bhagalpur, between December 2013 and March 2014. Methodology: A theoretical based work using Laptop to calculate the calculation for change in entropy of different test spinning black holes at Marwari College Bhagalpur and the residential research chamber of the first author. Results: The calculation shows that the change in entropy of spinning black holes of the rest masses for stellar – mass black holes (M ~ 5 – 20 Mʘ) in X-ray binaries is 2.483x10 63 to 39.731x10 63 J/K and for the super massive Black holes (M ~ 10 6 – 109.5 Mʘ) in active galactic nuclei is 9.932x10 73 to 28.432x10 80 J/K. The nature of the graph for XRBs is the same to the Hawking entropy with the event horizon and straight line for AGN which confirms the validity of equations EBHs=KBHs R’s and δS bh = [wzór]δE .Conclusion: The change in energy and entropy of black holes are mainly dependent on the mass and independent of their event horizons.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 13, 2; 95-103
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Change in energy and entropy of the non-spinning black holes
    Autorzy:
    Mahto, D.
    Khan, T. A.
    Kumar, A.
    Sah, R. K.
    Powiązania:
    https://bibliotekanauki.pl/articles/412037.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    event-horizon
    AGN
    Entropy & Energy
    Opis:
    In the present paper, we have derived an expression for change in entropy of non-spinning black holes on the basis of formula (EBH = KBHRS) as proposed by Kanak Kumari et al. (2010) and the formula δSbh= 2π/(k.c^2 ) δE (Mahto et al., 2011) and calculated their values for different test non-spinning black holes.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 4; 12-19
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Cancer Cell Plasma Membrane Potentials As Energetic Equivalents to Astrophysical Properties
    Autorzy:
    Persinger, M. A.
    Lafrenie, R. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/411648.pdf
    Data publikacji:
    2014
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    kT boundary
    magnetic energy
    cancer cell
    entropy
    noise band
    Hubble's parameter
    Opis:
    The primary physical and chemical parameters that define the hypopolarized plasma cell membrane of malignant (cancer) cells compared to non-malignant cells reflect universal characteristics. The median value for the resting membrane potential is the constant for the Nernst equation without reference to discrepancies in ion concentrations and is identical to Boltzmann energies at 37 °C. The threshold energy defining space-time converges with access to entropic processes that are reflected in the morphology of cancer cells and tumors. Slowing of growth in cancer cell lines but not normal cells following exposure to weak (~1 to 10 μT) patterned magnetic fields occurs when the energy induced within the cell corresponds to the energy equivalent of the hypopolarized membrane potential. The optimal temporal parameters for the efficacy of these fields can be derived from Hubble‟s parameter and the transform function for “noise” or “random” patterns within the system. Quantitative solutions and experimental data indicate that the cancer cell may be dominated by entropic process that can be attenuated or blocked by temporally-structured applied magnetic fields whose intensity matches the increment of energy associated with this threshold.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2014, 17, 1; 67-77
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Thermodynamic Characteristics of Solid
    Autorzy:
    Pluta, Z.
    Hryniewicz, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/411946.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    thermodynamic characteristics
    interstate space
    hermodynamics
    solid
    potential field
    specific proper heat energy
    specific gained heat energy
    energetic band
    heat work
    source characteristics of entropy growth
    entropy constant
    Opis:
    The paper is to present the developed thermodynamic characteristics of a solid. The existent description of dependence of temperature on the proper entropy (thermal capacitance) was used as the beginning point of the considerations. A critical evaluation of the picture of that dependence was a consecutive link of the considerations. Furthermore, an adequate description of the discussed heat phenomenon, taking into account the detailed characteristics of the entropy growth characteristics, has been presented. This characteristics indicates a clear quantum character of the studied reality, reflected by the potentials, proper and gained, respectively. These magnitudes are the measures of the proper and gained specific energies of this thermodynamic factor. The dependence of temperature on the specific energy has been described to formulate a formula on the heat work. At the end the dependence between the specific heat and the entropy constant is derived. In conclusion, a quantum nature of macroscopic reality has been noticed together with the definition of the heat energy notion. The necessity of noticing the description of any other reality in this scale has been indicated.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 2; 60-71
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Energy, entropy and work function in a molecule with degeneracy
    Autorzy:
    Malaver, Manuel
    Powiązania:
    https://bibliotekanauki.pl/articles/1177950.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Statistical mechanics
    degeneracy
    entropy
    heat capacity
    internal energy
    limit of high and low temperature
    work function
    Opis:
    In this paper, we have deduced some thermodynamic properties for a molecular system with degeneracy based in the postulates of the statistical mechanics. We obtain analytical expressions for internal energy U, heat capacity Cv , entropy S and work function o Helmholtz free energy A. It is predicted in this research the thermodynamic behavior of U, Cv, S and A in the limit of high and low temperature.
    Źródło:
    World Scientific News; 2018, 97; 250-257
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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