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  • Digital watermarking: An approach based on Hilbert transform 
    Agarwal, Rashmi; SANTHANAM, M. S.; Srinivas, K. (IEEE, 2017-01)
    Most of the well known algorithms for watermarking of digital images involve transformation of the image data to Fourier or singular vector space. In this paper, we introduce watermarking in Hilbert transform domain for ...
  • Magnetic phase transitions in HoFeO3 single crystals grown using the optical floating-zone method 
    BAG, RABINDRANATH; SINGH, SURJEET (AIP Publishing, 2017-05)
    We have successfully grown high-quality single crystals of potential multiferroic orthoferrite HoFeO3 in a four-mirror optical floating-zone furnace under two different grown atmospheres, namely, argon and air. The magnetic ...
  • Towards the equivalence of Diffie-Hellman problem and discrete logarithm problem for important elliptic curves used in practice 
    KUSHWAHA, PRABHAT (IEEE, 2017-07)
    In this paper, we have improved the existing estimates of the minimum number of group operations required to solve Diffie-Hellman problem for important elliptic curves used in practice. This leads us towards the equivalence ...
  • A Probabilistic Baby-step Giant-step Algorithm 
    Kushwaha, Prabhat; MAHALANOBIS, AYAN (Science and Technology Publications, 2017-07)
    In this paper, a new algorithm to solve the discrete logarithm problem is presented which is similar to the usual baby-step giant-step algorithm. Our algorithm exploits the order of the discrete logarithm in the multiplicative ...
  • Nonlinearity in data with gaps: Application to ecological and meteorological datasets 
    GEORGE, SANDIP V.; AMBIKA, G. (Indian Academy of Sciences, 2017-12)
    Datagaps are ubiquitous in real-world observational data. Quantifying nonlinearity in data having gaps can be challenging. Reported research points out that interpolation can affect nonlinear quantifiers adversely, ...
  • Determining the minimum embedding dimension for state space reconstruction through recurrence networks 
    Harikrishnan, K. P.; Jacob, Rinku; Misra, R.; AMBIKA, G. (Indian Academy of Sciences, 2017-12)
    The analysis of observed time series from nonlinear systems is usually done by making a time-delay reconstruction to unfold the dynamics on a multidimensional state space. An important aspect of the analysis is the choice ...
  • Dynamics of slow and fast systems on complex networks 
    GUPTA, KAJARI; AMBIKA, G. (Indian Academy of Sciences, 2017-12)
    We study the occurrence of frequency synchronized states with tunable emergent frequencies in a network of connected systems. This is achieved by the interplay between time scales of nonlinear dynamical systems connected ...
  • A Quantum-Secure Niederreiter Cryptosystem using Quasi-Cyclic Codes 
    KAPSHIKAR, U.; MAHALANOBIS, AYAN (European Commission, 2018-01)
  • On the effect of isovalent Bi substitution at the Eu site in the pyrochlore Eu2Ir2O7 
    TELANG, PRACHI; MISHRA, KSHITI; SINGH, SURJEET (AIP Publishing, 2018-04)
    We investigate the structural and physical properties of the pyrochlores Eu2-xBi2xIr2O7 (x = 0, 0.05, 0.1, 0.25, 0.5, 0.75 and 1). We found that the lattice parameters of the compositions close to Eu2Ir2O7 end (i.e., x < ...
  • Magnetic and magnetocaloric properties of Gd-doped Mn-Ni-Sn alloys 
    GHOSH, ARUP; NAIR, SUNIL (AIP Publishing, 2018-04)
    In this study, we have investigated the magnetic and magneto-structural transition in Mn-rich Mn2NiSn off-stoichiometric Heusler alloys by introducing Gd separately in the place of Mn and Ni. The structural transition ...
  • Numerical modelling of CIGS/CdS solar cell 
    Devi, Nisha; Aziz, Anver; DATTA, SHOUVIK (AIP Publishing, 2018-05)
    In this work, we design and analyze the Cu(In,Ga)Se2 (CIGS) solar cell using simulation software “Solar Cell Capacitance Simulator in One Dimension (SCAPS-1D)”. The conventional CIGS solar cell uses various layers, like ...
  • Searching for SUSY with Multijets and Missing Transverse Momentum 
    RANE, ADITEE (Springer, 2018-05)
    The proton-proton collisions at √s=13 TeV at the LHC, CERN provide an unique opportunity to search for new particles. An inclusive search for supersymmetry is performed in final states containing multiple jets and missing ...
  • Novel polyelectrolyte membranes for fuel and flow batteries: Insights from simulations 
    Sengupta, Soumyadipta; Kritikos, Giorgos; Karatasos, Konstantinos; VENKATNATHAN, ARUN; PANT, RAKESH; Komarov, Pavel; Lyulin, Alexey V. (AIP Publishing, 2018-07)
    Recent experiments on polyelectrolyte membranes have clearly shown that at operating temperatures perfluoroimide acid (PFIA) has a higher electrical conductivity than widely used Nafion. In the present paper classical ...
  • Diffusion of cosmic rays in heliosphere, observations from GRAPES-3 
    Arunbabu, K. P.; SUBRAMANIAN, PRASAD et al. (Sissa Medialab srl, 2018-08)
    The large area (560m2) GRAPES-3 tracking muon telescope has been operating at Ooty, India uninterruptedly from 2001. It records 4*10^9 muons of energy > 1GeV with an angular resolution of ~4 degree every day. The high ...
  • Long-term correction of GRAPES-3 muon telescope efficiency 
    Mohanty, P.K.; SUBRAMANIAN, PRASAD et al. (Sissa Medialab srl, 2018-08)
    The GRAPES-3 experiment in Ooty, India has been operating a large area (560m22) tracking muon telescope since 2000. It consists of 16 identical modules and each one is designed to measure the flux of muons in 13 ×× 13 ...
  • Transient weakening of geomagnetic shield probed by GRAPES-3 experiment 
    Mohanty, P.K.; SUBRAMANIAN, PRASAD et al. (Sissa Medialab srl, 2018-08)
    The large area (560 m2) GRAPES-3 tracking muon telescope in Ooty, India recorded a 2 hour (h) muon burst on 22 June 2015 starting at 19:00 UT in the midst of a continuing Forbush decrease. The burst occurred following the ...
  • Evolution of Reproductive Dominance in Animal Societies – Lessons From a Social Wasp 
    Chakraborty, Saikat; Bhadra, Anindita; Nandi, Anjan K; Annagiri, Sumana; Deshpande, Sujata; Lamba, Shakti; BANG, ALOK; Gadagkar, Raghavendra (Indian National Science Academy, 2018-09)
    Most insect societies can be classified as either primitively or highly eusocial. Primitively eusocial insect societies are usually led by queens who are morphologically indistinguishable from the workers and use aggression ...
  • CMS Collaboration 
    CMS Collaboration; CHAUHAN, S.; DUBE, SOURABH; HEGDE, V.; KAPOOR, A.; KOTHEKAR, K.; PANDEY, S.; RANE, A.; SHARMA, SEEMA et al. (Elsevier, 2019-02)
    Abstract:
  • Ab initio study of Y3AlZ (Z = B, C, N, O) 
    Ghule, A. S.; Ghule, S. S.; Garde, C. S.; Pandey, B.; Ramakrishnan, S.; SINGH, SURJEET; Rajarajan, A. K. (AIP Publishing, 2019-07)
    Electronic band structure calculations have been carried out for Y3AlZ (Z=B, C, N, O) system to check the possibility of new superconductor. The band structure calculations were carried out by augmented plane wave and local ...
  • Synthesis and magnetic behaviour of Er3AlCx 
    Ghule, S.S.; Garde, C.S.; Ramakrishnan, S.; SINGH, SURJEET; Rajarajan, A.K.; Laad, M. (AIP Publishing, 2019-07)
    High quality polycrystalline Er3AlCx (x = 0.8 and 1) system is synthesized using conventional tri arc melting. X-ray diffraction of Er3AlC is analyzed using Rietveld method which reveals single phase formation with Pm-3m ...

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