Browsing Department of Physics by Title

Browsing Department of Physics by Title

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  • Signature of Extended Solar Cycles as Detected from Ca ii K Synoptic Maps of Kodaikanal and Mount Wilson Observatory 
    Chatterjee, S.; Banerjee, D.; McIntosh, S.W.; Leamon, R.J.; Dikpati, M.; Srivastava, A.K.; Bertello, L. (Institute of Physics Publishing, 2019-03-20)
    In recent years there has been a resurgence of the study of extended solar cycles (ESCs) through observational proxies mainly in extreme ultraviolet. But most of them are limited only to the space-based era covering only ...
  • Signature of Oxide-Ion Conduction in Alkaline-Earth-Metal-Doped Y3GaO6 
    Singh, P.; Pandey, R.; Miruszewski, T.; Dzierzgowski, K.; Mielewczyk-Gryn, A.; Singh, P. (American Chemical Society, 2020)
    We have studied alkaline-earth-metal-doped Y3GaO6 as a new family of oxide-ion conductor. Solid solutions of Y3GaO6 and 2% -Ca2+-, -Sr2+-, and -Ba2+-doped Y3GaO6, i.e., Y(3-0.06)M0.06GaO6-δ (M = Ca2+, Sr2+, and Ba2+), were ...
  • Signatures of red-shifted foot points in the quiescent coronal loop system 
    Rao, Yamini K.; Srivastava, Abhishek K.; Kayshap, Pradeep; Dwived, Bhola N. (Copernicus GmbH, 2019-08-30)
    We observed quiescent coronal loops using multiwavelength observations from the Atmospheric Imaging Assembly (AIA) aboard the Solar Dynamics Observatory (SDO) on 13 April 2016. The flows at the foot points of such loop ...
  • Smap soil moisture product assessment over wales, u.K., using observations from the wsmn ground monitoring network 
    Gupta, D.K.; Srivastava, P.K.; Singh, A.; Petropoulos, G.P.; Stathopoulos, N.; Prasad, R. (MDPI AG, 2021-06-01)
    Soil moisture (SM) is the primary variable regulating the soil temperature (ST) differences between daytime and night-time, providing protection to crop rooting systems against sharp and sudden changes. It also has a number ...
  • Solar x-ray control of the ionospheric absorption measured by the sweep frequency method 
    Gupta, G.P. (Springer India, 1978-11)
    The ionospheric absorption data measured by the sweep frequency method have been compared with the solar x-ray data in the band of 1-8 A during quiet- and disturbed-sun conditions. The degree of solar x-ray control of ...
  • Spatial damping of compressional MHD waves in prominences 
    Singh, K.A.P.; Dwivedi, B.N.; Hasan, S.S. (2007-10)
    Aims. We study the spatial damping of linear compressional MHD waves in a homogeneous, isothermal, and unbounded prominence. Methods. We derive a general dispersion relation invoking the Newtonian radiation and turbulent ...
  • SPATIAL VARIATION of URBAN HEAT ISLAND INTENSITY in URBAN CITIES USING MODIS SATELLITE DATA 
    Bala, R.; Prasad, R.; Yadav, V.P.; Sharma, J. (International Society for Photogrammetry and Remote Sensing, 2019-10-01)
    Urban Heat Island (UHI) refers to the occurrence of higher temperatures in urban areas than the neighbouring rural areas. The neighbouring land cover also has some influence on the urban temperatures. The present study ...
  • Spectroscopic observations and modelling of impulsive Alfvén waves along a polar coronal jet 
    Jelínek, P.; Srivastava, A. K.; Murawski, K.; Kayshap, P.; Dwivedi, B. N. (EDP Sciences, 2015-07-12)
    Context. The magnetic reconnection in the solar corona results in impulsively generated Alfvén waves, which drive a polar jet. Aims. Using the Hinode/EIS 2" spectroscopic observations, we study the intensity, velocity, and ...
  • Spin freezing and field induced transition in (Tb1−xEux)2Ti2O7: A magnetic property study 
    Singh, P.; Pal, A.; Gangwar, V.K.; Ghosh, S.; Singh, R.K.; Ghosh, A.K.; Chatterjee, S. (Elsevier B.V., 2020-11-15)
    The magnetic properties and Raman effect of (Tb1−xEux)2Ti2O7 have been investigated. Raman study indicates the existence of hardening due to phonon-phonon anharmonic interaction. The DC magnetic study indicates the significant ...
  • Stability criterion for white dwarfs in Palatini f(R) gravity 
    Sarmah, L; Kalita, S; Wojnar, A (American Physical Society, 2021-12-24)
    Recent observations of several peculiar over- and underluminous type Ia supernovae infer indirect evidence for the violation of the Chandrasekhar mass limit by suggesting the existence of super- and sub-Chandrasekhar ...
  • Stokes correlation to estimate topological charge from the speckle pattern 
    Sarkar, Tushar; Singh, Rakesh Kumar (Springer Science and Business Media Deutschland GmbH, 2022-12-15)
    The orbital angular momentum (OAM) of the vortex or helical beam, connected with the topological charge (TC) of the beam, has been used as an alternative degree of freedom to encode and decode the information in the optical ...
  • A Strategic Review on Carbon Quantum Dots for Cancer-Diagnostics and Treatment 
    Naik, Kaustubh; Parmar, Avanish Singh (Frontiers Media S.A., 2022-05-18)
    The understanding of the genesis of life-threatening cancer and its invasion calls for urgent development of novel technologies for real-time observations, early diagnosis, and treatment. Quantum dots (QDs) grabbed the ...
  • Stretching of a single-stranded DNA 
    Mishra, G.; Giri, D.; Kumar, S. (2009-03-03)
    Recent experiments have shown that the force-extension (F-x) curve for single-stranded DNA (ssDNA) consisting only of adenine [poly(dA)] is significantly different from thymine [poly(dT)]. Here, we show that the base ...
  • Structural and optical characterizations of BaSnO3 nanopowder synthesized by aqueous sol-gel method 
    Kumar, Upendra; Jawed Ansaree, Md.; Upadhyay, Shail (University of Novi Sad, Faculty of Technology, 2017-08-10)
    Precursor gel for preparation of nanocrystalline BaSnO3 powder was synthesised by aqueous sol-gel method using Ba(OH)2 · 8 H2O and Na2 SnO3 · 3 H2O as raw materials. Thermogravimetric and differential scanning calorimetric ...
  • Structural and optical properties of solvothermal synthesized nearly monodispersed CdSe nanocrystals 
    Shahi, A K; Pandey, B K; Singh, B P; Gopal, R (Institute of Physics Publishing, 2016-08-01)
    Water soluble nearly monodisperse CdSe nanocrystals have been successfully synthesized via aqueous phase solvothermal route in non ionic surfactant glycolic acid ethoxylate 4-non phenyl ether (GAEPE). X-ray diffraction ...
  • Structured transmittance illumination coherence holography 
    Mandal, Aditya Chandra; Sarkar, Tushar; Zalevsky, Zeev; Singh, Rakesh Kumar (Nature Research, 2022-12)
    The coherence holography offers an unconventional way to reconstruct the hologram where an incoherent light illumination is used for reconstruction purposes, and object encoded into the hologram is reconstructed as the ...
  • A study of a long duration B9 flare-CME event and associated shock 
    Chandra, R.; Chen, P.F.; Fulara, A.; Srivastava, A.K.; Uddin, W. (Elsevier Ltd, 2018-01-15)
    We present and discuss here the observations of a small long duration GOES B-class flare associated with a quiescent filament eruption, a global EUV wave and a CME on 2011 May 11. The event was well observed by the Solar ...
  • Study of phase evolution and dielectric properties of Sr2Mn0.7Sn0.3O4 
    Nirala, Gurudeo; Upadhyay, Shail (University of Novi Sad, Faculty of Technology, 2023-06-15)
    Ruddlesden-Popper oxide Sr2Mn0.7Sn0.3O4 was synthesized by solid state method by calcining at different temperatures between 1200 and 1500 °C. The phase evolution during thermal treatments was investigated and it was shown ...
  • Study of structural, electrical, and photoluminescent properties of SrCeO3 and Sr2CeO4 
    Yadav, Dharmendra; Kumar, Upendra; Upadhyay, Shail (Tsinghua University Press, 2019-02-09)
    Phase pure powders of SrCeO3 and Sr2CeO4 have been synthesized by calcination at 1000 °C for 14 h via solid state ceramic route. Ceramics/pellets of these samples have been obtained by sintering at 1200 ℃ for 12 h. The ...
  • Study of whistler mode instability in Saturn's magnetosphere 
    Singhal, R.P.; Tripathi, A.K. (Copernicus GmbH, 2006)
    A dispersion relation for parallel propagating whistler mode waves has been applied to the magnetosphere of Saturn and comparisons have been made with the observations made by Voyager and Cassini. The effect of hot ...

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