IIA Institutional Repository

Browsing by Author "Krishan, V"

Browsing by Author "Krishan, V"

Sort by: Order: Results:

  • Neutron oscillation and the primordial magnetic field 
    Sivaram, C; Krishan, V (Gordon and Breach Science Publishers, 1983)
    The phenomenon of neutron-antineutron oscillations, recently proposed as a novel consequence of grand unified theories, permits limits to be placed on any primordial field present during the nucleosynthetic stage of the ...
  • Neutron oscillation as a source of excess sub-GeV antiprotons in galactic cosmic rays 
    Sivaram, C; Krishan, V (Nature Publishing Group, 1982-09)
    The recent detection1,2 of an antiproton/proton (/p) ratio at energies much less than 1 GeV is several orders of magnitude above that predicted for production from primary cosmic ray collisions. It is well recognized that ...
  • Nonlinear analysis of two contra-streaming electron beams - plasma system 
    Krishan, V (D.Reidel Publishing Co.,, 1978-08)
    The nonlinear theory of electromagnetic modes in the radio frequency range, excited from a system consisting of two contra-streaming electron beams, supports the experimental observation that out of w~(n + ½)w/subce,w = ...
  • Nonlinear jeans instability in an uniformly rotating gas 
    Chakrabarti, N; Pal, B; Krishan, V (Springer Netherlands, 2008)
    A nonlinear stability analysis of a uniformly rotating gas in a gravitational field has been performed. One dimensional non-linear equations have been solved by the double-Lagrangian transformation method. An explosive ...
  • Observations and interpretation of solar decameter type IIIb radio bursts 
    Krishan, V; Subramanian, K. R; Sastry, Ch. V (Kluwer Academic Publishers, 1980-06)
    Solar decameter bursts of Type IIIb are observed with a multichannel radiometer at wavelengths around 12m. The time and frequency resolutions were 10 ms and 100 kHz. Observations on the time structure of these bursts are ...
  • Observations and interpretation of the slowly varying component of solar radio emission at decameter wavelengths 
    Sastry, Ch. V; Dwarakanath, K. S; Shevgaonkar, R. K; Krishan, V (D. Reidel Publishing Co., 1981-10)
    We have observed the slowly varying component of solar radio emission at a frequency of 34.5 MHz with half power beam widths of 26/40 in the east-west and north-south directions, respectively. It is found that the observed ...
  • On the correlation between exciter duration and decay constant of solar decameter Type III radio bursts 
    Subramanian, K. R; Krishan, V; Sastry, Ch. V (Kluwer Academic Publishers, 1981-04)
    It is observed that while there exists a strong correlation between the decay constant and the exciter duration for isolated type III radio bursts, it is absent for those type III radio bursts which are preceded by type ...
  • On the Fractal Structure of Solar Supergranulation 
    Paniveni, U; Krishan, V; Singh, J; Srikanth, R (Springer, 2005-10)
    We employ fractal analysis to study the complexity of supergranulation structure using the Solar and Heliospheric Observatory (SOHO) dopplergrams. Our data consists of 200 visually selected supergranular cells, for which ...
  • One more explanation of superluminal motion 
    Krishan, V (Indian Academy Sciences, 1988-12)
    A model in which stimulated Raman scattering produces superluminal motion in extragalactic radio sources is examined. The scattering medium studied is a plasma whose position, density, and temperature determine the rate ...
  • One-third spectrum in large scale Hall-magnetohydrodynamic turbulence 
    Krishan, V; Mahajan, S. M (American Institute of Physics, 2004-11)
    In a recent study [H. Branover, A. Eidelman, and E. Golbraikh, ``On the universality of large-scale turbulence,'' Phys. Fluids 16, 845 (2004)] the properties of the large scale turbulence have been investigated theoretically ...
  • Optical interferometric observations of a transient event of 1986 March 13 in the coma of Comet Halley 
    Prasad, D. C; Chandrasekhar, T; Desai, J. N; Ashok, N. M; Krishan, V (Indian Academy of Sciences, 1989-03)
    During the recent apparition of Comet Halley in 1985-86, a transient ionic event in the form of a blob of H2O(+) emission was recorded in the coma at about 0 h UT on March 13, 1986. Observations were carried out using a ...
  • Parametric decay instability in 3C 273 
    Gangadhara, R. T; Krishan, V (Cambridge University Press, 1991)
    The parametric decay instability (PDI) causes anomalous absorption of strong electromagnetic (e.m) radiation under specific conditions of energy and momentum conservation. It is shown that in the source 3C 273, the conditions ...
  • Peculiarities in the ionic tail of Comet Ikeya-Seki (1965f) 
    Krishan, V; Sivaraman, K. R (D. Reidel Publishing Co., 1982-04)
    Direct photographs of Comet Ikeya-Seki obtained on four consecutive days from October 29 to November 1, 1965, are used for an analysis of the multiple helical structures in the ionised tail. The formation of these structures ...
  • Physics of partially ionized plasmas 
    Krishan, V (Cambridge University Press, 2016)
    DescriptionContentsResourcesCoursesAbout the Authors Plasma is one of the four fundamental states of matter; the other three being solid, liquid and gas. Several components, such as molecular clouds, diffuse interstellar ...
  • Plasma acceleration by ion-acoustic turbulence 
    Krishan, V (Kluwer Academic Publishers, 1980-12)
    An energetic proton beam passing through a stationary ionized medium, excites ion-acoustic turbulence. The ion-acoustic instability saturates due to the non-linear indirect wave-particle scattering. The electric field ...
  • Plasma acceleration by ion-acoustic turbulence 
    Krishan, V (D. Reidel Publishing Co., 1980-12)
    An energetic proton beam passing through a stationary ionized medium, excites ion-acoustic turbulence. The ion-acoustic instability saturates due to the non-linear indirect wave-particle scattering. The electric field ...
  • Plasma heating in a sheared magnetic field 
    Krishan, V (Indian Academy of Sciences, 1981-12)
    The mechanism of spatial resonance of Alfven waves for heating a collisionless plasma is studied in the presence of a twisted magnetic field. In addition to modifying the equilibrium condition for a cylindrical plasma, the ...
  • Plasma mechanisms for variability in active galactic nuclei 
    Krishan, V; Wiita, P J (1994-03)
    We consider several physical processes, dominated by plasma effects, that might play roles in producing variability in Active Galactic Nuclei (AGN). One class of processes involves oscillations in the plasma itself. If ...
  • Plasma wave aided two photon decay of an electromagnetic wave in a plasma 
    Magesh Kumar, K. K; Singh, R; Krishan, V (American Institute of Physics Publishing, 2014-11)
    The presence of a Langmuir wave in an unmagnetized plasma is shown to allow parametric decay of an electromagnetic wave into two electromagnetic waves, which is otherwise not allowed due to wave number mismatch. The decay ...
  • Plasmas: the first state of matter 
    Krishan, V (Cambridge University Press, 2014)
    Most astronomers believe that the universe began about 15 billion years ago when an explosion led to its expansion and cooling. The present state of the universe compels us to believe that the universe was extremely hot ...

Search DSpace

Browse

My Account