Search Results - "Kariyappa, R."
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Evaluating the efficacy of microbial antagonists in inducing resistance, promoting growth, and providing biological control against powdery mildew in wheat
Published in Frontiers in microbiology (23-07-2024)“…This study evaluates the biocontrol efficacy of three bacterial strains DTPF-3, DTBA-11, and DTBS-5) and two fungal strains ( Pusa-5SD and An-27) antagonists,…”
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Origin of the Solar Rotation Harmonics Seen in the EUV and UV Irradiance
Published in Solar physics (01-11-2021)“…Long-term periodicities in the solar irradiance are often observed with periods proportional to the solar rotational period of 27 days. These periods are…”
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DYNAMICS OF THE SOLAR MAGNETIC BRIGHT POINTS DERIVED FROM THEIR HORIZONTAL MOTIONS
Published in The Astrophysical journal (10-06-2012)“…The subarcsecond bright points (BPs) associated with the small-scale magnetic fields in the lower solar atmosphere are advected by the evolution of the…”
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OBSERVATIONS OF THE INTERACTION OF ACOUSTIC WAVES AND SMALL-SCALE MAGNETIC FIELDS IN A QUIET SUN
Published in The Astrophysical journal (10-01-2012)“…The effect of the magnetic field on photospheric intensity and velocity oscillations at the sites of small-scale magnetic fields (SMFs) in a quiet Sun near the…”
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NONLINEAR FORCE-FREE FIELD MODELING OF THE SOLAR MAGNETIC CARPET AND COMPARISON WITH SDO /HMI AND SUNRISE /IMAX OBSERVATIONS
Published in The Astrophysical journal (01-10-2014)“…In the quiet solar photosphere, the mixed polarity fields form a magnetic carpet that continuously evolves due to dynamical interaction between the convective…”
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OBSERVATIONS AND MODELING OF THE EMERGING EXTREME-ULTRAVIOLET LOOPS IN THE QUIET SUN AS SEEN WITH THE SOLAR DYNAMICS OBSERVATORY
Published in The Astrophysical journal (01-05-2013)“…We used data from the Helioseismic and Magnetic Imager (HMI) and the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO) to study…”
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Spatially resolved images and solar irradiance variability
Published in Journal of astrophysics and astronomy (01-06-2008)“…The Sun is the primary source of energy that governs both the terrestrial climate and near-earth space environment. Variations in UV irradiances seen at earth…”
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Preliminary Results on Irradiance Measurements from Lyra and Swap
Published in Advances in astronomy (01-01-2012)“…The first and preliminary results of the photometry of Large Yield Radiometer (LYRA) and Sun Watcher using Active Pixel system detector and Image Processing…”
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Solar oscillations in strong and weak fraunhofer lines over a quiet region
Published in Solar physics (01-05-1996)“…We have analysed a 35-min-long time sequence of spectra in the Ca II H line, Na I D1 and D2 lines, and in a large number of strong and weak Fe I lines taken…”
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Intensity oscillations in chromospheric bright points and network elements
Published in Solar physics (01-09-1994)“…From a 35-min time series of photographic spectra in the Ca II H-line obtained at the Vacuum Tower Telescope (VTT) of the Sacramento Peak Observatory under…”
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CaII K imaging to understand UV irradiance variability
Published in Journal of astrophysics and astronomy (01-09-2000)“…To identify and understand the underlying physical mechanisms of total solar and UV irradiance variability and to estimate the contribution of various…”
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The extreme solar activity during october–november 2003
Published in Journal of astrophysics and astronomy (01-06-2006)“…The positional measurements of sunspots from the Kodaikanal Observatory and Solar Geophysical data are used to study the association between occurrence of the…”
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Observational searches for chromospheric G-mode oscillations from CaII H-line observations
Published in Journal of astrophysics and astronomy (01-06-2006)“…We have used a high spatial and temporal resolution of long time sequence of spectra in CaII H-line obtained at the Vacuum Tower Telescope (VTT) of the…”
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Study of Inhomogeneities in the Solar Atmosphere
Published in Publications of the Astronomical Society of the Pacific (01-11-1993)Get full text
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Variability of the solar chromospheric network over the solar cycle
Published in Solar physics (01-06-1994)Get full text
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Contribution of chromospheric features to UV irradiance variability from spatially-resolved Ca II K spectroheliograms: I. A new method of analysis and preliminary results
Published in Solar physics (1996)“…We have digitized the Ca II K spectroheliograms, observed at the National Solar Observatory at Sacramento Peak, for the period 1980 (maximum of solar cycle…”
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Heating of the quiet solar chromosphere. I: Role of the inner network bright points
Published in Solar physics (01-05-1994)Get full text
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OBSERVATIONS OF THE INTERACTION OF ACOUSTIC WAVES AND SMALL-SCALE MAGNETIC FIELDS IN A QUIET SUN
Published in The Astrophysical journal (2011)Get full text
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Ca II K line profile of the truly quiet Sun
Published in Solar physics (01-01-1996)“…While evaluating the chromospheric variability (solar cycle related or any other) using the Ca II K line ( lambda 3933.684 A) as an indicator, an essential…”
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Observational Searches for Chromospheric g-Mode Oscillationsfrom Call H-Line Observations
Published in Journal of astrophysics and astronomy (01-09-2006)“…We have used a high spatial and temporal resolution of long time sequence of spectra in Call H-line obtained at the Vacuum Tower Telescope (VTT) of the…”
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