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  • AGN Feedback in Galaxy Groups: A Joint GMRT/X‐ray Study 
    Giacintucci, S.; Vrtilek, J. M.; O’Sullivan, E.; Raychaudhury, S.; David, L. P.; Venturi, T.; ATHREYA, RAMANA; Gitti, M. (AIP Publishing, 2009-12)
    We present an ongoing study of 18 nearby galaxy groups, chosen for the availability of Chandra and/or XMM‐Newton data and evidence for AGN/hot intragroup gas interaction. We have obtained 235 and 610 MHz observations at ...
  • Iron substitution in CdSe nanoparticles: Magnetic and optical properties 
    Singh, S.B.; Limaye, Mukta V.; Date, S.K.; Gokhale, Shubha; KULKARNI, SULABHA (American Physical Society, 2009-12)
    Chemically synthesized, thiol capped undoped, and Fe doped CdSe nanoparticles (NPs) have been investigated using a variety of physicochemical techniques. The electron spin resonance spectra exhibit two distinct signals at ...
  • Optical investigations of interaction between zinc tetra phenyl porphyrin and CdSe nanoparticles 
    Lihitkar, N.B.; Singh, S.B.; Singh, J.; Srivastava, O.N.; Naik, R.H.; KULKARNI, SULABHA (Elsevier B.V., 2009-12)
    Interactions between nanoparticles of zinc tetra phenyl porphyrin (ZnTPP) with CdSe nanoparticles in dimethyl sulphoxide solvent have been investigated. A ZnTPP–CdSe complex was formed which showed substantial changes in ...
  • Computing the multifractal spectrum from time series: An algorithmic approach 
    Harikrishnan, K. P.; Misra, R.; AMBIKA, G.; Amritkar, R.E. (AIP Publishing, 2009-12)
    We show that the existing methods for computing the f(α) spectrum from a time series can be improved by using a new algorithmic scheme. The scheme relies on the basic idea that the smooth convex profile of a typical f(α) ...
  • Antiphase Synchronization in Environmentally coupled Rossler Oscillators 
    AMBIKA, G.; VERMA, S. (Cornell University Library, 2009-12)
    We study the manifestation of antiphase synchronization in a system of n Rossler Oscillators coupled through a dynamic environment. When the feedback from system to environment is positive (negative) and that from environment ...
  • Cell-level canonical sampling by velocity scaling for multiparticle collision dynamics simulations 
    Huang, C. C.; CHATTERJI, APRATIM; Sutmann, G.; Gompper, G; Winkler, R. G. (Elsevier B.V., 2010-01)
    A local Maxwellian thermostat for the multiparticle collision dynamics algorithm is proposed. The algorithm is based on a scaling of the relative velocities of the fluid particles within a collision cell. The scaling factor ...
  • Scaling relation for determining the critical threshold for continuum percolation of overlapping discs of two sizes 
    Balram, Ajit C.; DHAR, DEEPAK (Indian Academy of Sciences, 2010-01)
    We study continuum percolation of overlapping circular discs of two sizes. We propose a phenomenological scaling equation for the increase in the effective size of the larger discs due to the presence of the smaller discs. ...
  • Near-field optical properties of silver nanocylinders arranged in a Pascal triangle 
    KUMAR, G. V. PAVAN (Optical Society of America, 2010-01)
    The Pascal triangle is a geometric representation of binomial coefficients in triangular form. We utilize this formalism to deterministically arrange silver nanocylinders of different sizes (30, 60, and 90nm) on a triangle ...
  • Gravity and Yang-Mills theory 
    ANANTH, SUDARSHAN (World Scientific Publishing, 2010-01)
    Three of the four forces of Nature are described by quantum Yang–Mills theories with remarkable precision. The fourth force, gravity, is described classically by the Einstein–Hilbert theory. There appears to be an inherent ...
  • LC2 formulation of supergravity 
    ANANTH, SUDARSHAN (Springer Nature, 2010-02)
    We formulate (N = 1, d = 11) supergravity in components in light-cone gauge (LC 2) to order . In this formulation, we use judicious gauge choices and the associated constraint relations to express the metric, three-form ...
  • Interplay between magnetism and superconductivity in HoNi2B2C revisited 
    Alleno, E; SINGH, S.; Dhar, S. K.; Andre, G. (IOP Publishing, 2010-04)
    In this work the magnetic and superconducting properties of HoNi2B2C were investigated by using powder neutron diffraction and the specific heat and upper critical field (Hc2) measurements as a function of temperature. ...
  • Parametric characterisation of a chaotic attractor using the two scale Cantor measure 
    Harikrishnan, K. P.; Misra, R.; AMBIKA, G.; Amritkar, R.E. (Elsevier B.V., 2010-04)
    A chaotic attractor is usually characterised by its multifractal spectrum which gives a geometric measure of its complexity. Here we present a characterisation using a minimal set of independent parameters which is uniquely ...
  • Synchronized states in chaotic systems coupled indirectly through a dynamic environment 
    Resmi, V.; AMBIKA, G.; Amritkar, R.E. (American Physical Society, 2010-04)
    We consider synchronization of chaotic systems coupled indirectly through common environment where the environment has an intrinsic dynamics of its own modulated via feedback from the systems. We find that a rich variety ...
  • Development in microreactor technology for nanoparticle synthesis 
    Singh, Akanksha; Malek, Chantal Khan; KULKARNI, SULABHA (World Scientific Publishing, 2010-04)
    Microreactor technology is a new concept of chemical synthesis for nanoparticle production. The "state of the art" in microreactor fabrication and its application to the synthesis of nanoparticles is reviewed. The microfluidic ...
  • Enhanced field emission from ZnO nanoneedles on chemical vapour deposited diamond films 
    Marathe, Sonali; Koinkar, Pankaj; Ashtaputre, Shriwas; Sathe, Vasant; More, M. A; KULKARNI, SULABHA (Elsevier B.V., 2010-05)
    ZnO nanoneedles were coated on hot filament chemical vapour deposited diamond thin films to enhance the field emission properties of ZnO nanoneedles. The virgin diamond films and ZnO nanoneedles on diamond films were ...
  • Epitaxial growth in dislocation-free strained asymmetric alloy films 
    Desai, Rashmi C.; Kim, HoKwon; CHATTERJI, APRATIM; Ngai, Darryl; Chen, Si; Yang, Nan (American Physical Society, 2010-06)
    Epitaxial growth in strained asymmetric, dislocation-free, coherent, alloy films is explored. Linear-stability analysis is used to theoretically analyze the coupled instability arising jointly from the substrate-film lattice ...
  • AGN feedback in groups of galaxies: a joint X‐ray/low‐frequency radio study 
    Giacintucci, S.; O’Sullivan, E.; Vrtilek, J. M.; Raychaudhury, S.; David, L. P.; Venturi, T.; ATHREYA, RAMANA; Gitti, M. (AIP Publishing, 2010-07)
    We present an ongoing, low‐frequency radio/X‐ray study of 18 nearby galaxy groups, chosen for the evidence, either in the X‐ray or radio images, of AGN/intragroup gas interaction. We have obtained radio observations at 235 ...
  • Volume exclusion and elasticity-driven directional transport: a model inspired by bacterium motility 
    BHATTACHARYAY, ARIJIT (IOP Publishing, 2010-07)
    We present a model to capture the role of strong attractive interaction and volume exclusion inducing super-diffusive transport of small systems in a thermal atmosphere. We characterize such systems on the basis of three ...
  • Critical current and vortex dynamics in single crystals of Ca (Fe 1 − x Co x ) 2 As 2 
    Pramanik, A. K.; HARNAGEA, LUMINITA; SINGH, S.; Aswartham, S.; Behr, G.; Wurmehl, S.; Hess, C.; Klingeler, R.; Chner, B. (American Physical Society, 2010-07)
    We investigate the critical current density and vortex dynamics in single crystals of Ca ( Fe 1 − x Co x ) 2 As 2 ( x = 0.051 , 0.056, 0.065, and 0.073). The samples exhibit different critical temperatures and superconducting ...
  • The very steep spectrum radio halo in Abell 697 
    Macario, G.; Venturi, T.; Brunetti, G.; Dallacasa, D.; Giacintucci, S.; Cassano, R.; Bardelli, S.; ATHREYA, RAMANA (EDP Sciences, 2010-07)
    Aims. We present a detailed study of the giant radio halo in the galaxy cluster Abell 697 to constrain its origin and connection with the cluster dynamics. Methods. We performed high sensitivity GMRT observations at 325 ...

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