IIA Institutional Repository: Recent submissions

  • Gravimagnetic field, torsion, and gravitational shielding 
    de Sabbata, V; Sivaram, C (Springer, 1991-08)
    Many arguments are given in support of the existence of a gravimagnetic field in nature. Its connection with torsion is elaborated. Some consequences of the existence of such a field for effects of gravitational shielding ...
  • Response of the equatorial ionosphere in the Indian (midnight) sector to the severe magnetic storm of July 15, 2000 
    Sastri, J. H; Niranjan, K; Subbarao, K. S. V (American Geophysical Union, 2002-07)
    During the severe magnetic storm of July 15, 2000, an impulsive and remarkably large downward movement of F region occurred simultaneously at locations throughout the equatorial region (dip 0.3-20°N) in the Indian sector, ...
  • Height gradient of F region vertical drift in the evening equatorial ionosphere 
    Sastri, J. H; Varma, V. K. M; Nayar, S. R. P (American Geophysical Union, 1995-10)
    Simultaneous measurements of F-region vertical drift are made in the evening hours (1700-2100 IST) at Trivandrum (dip 0.6°N) and Kodaikanal (dip 4°N) on fifteen days during December 1993- January 1994 using the HF phase ...
  • Thermospheric meridional neutral winds associated with equatorial midnight temperature maximum (MTM) 
    Sastri, J. H; Rao, H. N. R; Somayajulu, V. V; Chandra, H (American Geophysical Union, 1994-05)
    Coordinated measurements were made on two nights in December 1992 of thermospheric temperature with a Fabry-Perot Interferometer (FPI) at Kavalur ( dip∼ 9.5° N) and of F-layer height with ionosondes at Trivandrum ( dip∼ ...
  • Solar cycle and seasonal variations in F-region vertical drifts over Kodaikanal, India 
    Ramesh, K. B; Sastri, J. H (European Geophysical Society, 1995-06)
    Measurements of the changes in phase path of F-region reflections at normal incidence at Kodaikanal (77°28'E, 10°14'N, dip 3°N) from February 1991 to February 1993 are used to determine the variation of the equatorial ...
  • Is the Quantum Mechanical Description of Physical Reality Complete? Proposed Resolution of the EPR Puzzle 
    Unnikrishnan, C. S (Springer, 2002-02)
    The question whether the quantum mechanical description of physical reality could be considered complete was asked in 1935 by Einstein, Podolsky, and Rosen. Subsequent debates and developments lead to the notion that all ...
  • Black Hole Hawking Radiation May Never Be Observed! 
    Sivaram, C (Springer, 2001-02)
    Thermal Hawking emission from black holes is a remarkable consequence of the unification of quantum physics and gravitation. Black holes of a few solar masses are the only ones which can form in the present universe. ...
  • Torsion and massive electrodynamics in the early universe 
    Sivaram, C; de Andrade, L. C. G (Springer, 1994-06)
    A recent model based on massive electrodynamics in spaces with torsion gave rise to London type equations with Meissner-like effects and photon mass. This effective photon mass can be related to a time-varying torsion ...
  • Strong Gravity and Strings 
    Sivaram, C; de Sabbata, V (Wiley InterScience, 1991)
  • Radiation of the fifth-force field 
    Bertotti, B; Sivaram, C (Springer, 1991-11)
    The «fifth-force» field, if it exists, has radiative effects in competition with the gravitational radiation. Since this field violates the Principle of Equivalence, it may affect a gravitational wave detector more than a ...
  • Abundance gradient in interstellar medium 
    Giridhar, S (Centre of Advanced Study in Astronomy Osmania University, 1984)
    The author discusses in this review the implication of observed abundance gradient in the interstellar medium on the chemical evolution of the galaxy. I describe the ingradients that are required to develop enrichment model ...
  • Abundance analysis of selected Cepheids and the galactic distribution of metallicity 
    Giridhar, S (Indian Academy of Sciences, 1983-06)
    The determinations are made in order to study the large-scale chemical inhomogeneities across the galactic disk. High-dispersion spectra are obtained of WZ Sgr, X Sgr, Zeta Gem, T Mon and SV Mon. The atmospheric abundances ...
  • Detection of an extremely active state of AM Canum Venaticorum 
    Kutty, K. R. N; Marar, T. M. K; Padmini, V. N; Seetha, S; Kasturirangan, K; Rao, U. R; Bhattacharyya, J. C; Mohin, S; Jayakumar, K (D. Reidel Publishing Co., 1986)
    We report fast photometric observations of AM Canum Venaticorum (AM CVn), the ultrashort-period, hydrogen-deficient variable, are reported. An intense flare of (Delta m) peak roughly 0.34 was detected on February 24th, ...
  • Minor planets and planetary rings 
    Bhattacharyya, J. C (Centre of Advanced Study in Astronomy Osmania University, 1984)
    Circumstances of the discovery of the first asteroid and the characteristics of various orbits followed by them have been discussed. Their shapes, compositions and evolutionary histories so far known have also been described. ...
  • Astronomy in India in the 20th century. 
    Bhattacharyya, J. C; Vagiswari, A (Indian National Science Academy, 1985)
  • The inconsistency of a model for internal structure or black holes 
    Sivaram, C (Indian Academy of Sciences, 1985-08)
    The recent claim that a black hole can be treated as a relativistic gas of micro black holes (planckions) is shown to be physically inconsistent and in fact is grossly in error. Any deductions made about black holes from ...
  • Mildly Active Nuclei of Galaxies 
    Prabhu, T. P (Indian Academy of Sciences, 1985)
    Milder forms of activity in the nuclear regions of galaxies are reviewed. Three classes of activity are identified, namely starbursts, high-excitation emission-line and low-ionization emission-line nuclei. Sérsic perinuclear ...
  • Limits on surface magnetic fields of fast pulsars 
    Datta, B (Nature Publishing Group, 1984-03-22)
    The rapid rotation rate of millisecond pulsar PSR 1937+214 suggests that it may be close to the point of rotational instability. Rotational stability implies lower limits on the mass and moment of inertia, and an upper ...
  • Science in British India. I. Colonial tool 
    Kochhar, R. K (Indian Academy of Science, 1992-12-10)
  • Polarimetric observations of hydrogen deficient stars 
    Raveendran, A. V; Kameswara Rao, N; Deshpande, M. R; Joshi, U. C; Kulshrestha, A. K (Reidel Publishing Company, 1986)
    Polarimetric observations of HD 30353, SU Tau, XX Cam, R CrB, UV Cas, BD +13°3224, BD +10°2179 and HD 124448 are presented. The linear polarization of HD 30353 is found to vary appreciably at Hα over a time scale as short ...

Search DSpace

Browse

My Account