Now showing items 1-5 of 5

  • A general procedure of estimating the population mean in the presence of non-response under double sampling using auxiliary information 

    Singh, H. P.; Kumar, Sunil (Institut d'Estadística de Catalunya, 2009)
    Article
    Open Access
    In the present study, we propose a general class of estimators for population mean of the study variable in the presence of non-response using auxiliary information under double sampling. The expression of mean squared ...
  • Nonlinear dielectric response of BaBi4Ti4O15 ceramics 

    Kumar, Sunil; Ochoa Guerrero, Diego A.; García García, José Eduardo; Varma, K.B.R (American Institute of Physics (AIP), 2012)
    Conference lecture
    Restricted access - publisher's policy
    Nonlinear dielectric response of BaBi4Ti4O15 ceramics synthesized via the conventional solid-state reaction route has been monitored over a wide range of electric field strengths (E0 = 0.5-5 kV/cm). Dielectric permittivity ...
  • Nonlinear dielectric response of BaBi4Ti4O15 ceramics 

    Kumar, Sunil; Ochoa Guerrero, Diego A.; García García, José Eduardo; Varma, K.B.R (2013-02-05)
    Article
    Restricted access - publisher's policy
    Nonlinear dielectric response of BaBi 4 Ti 4 O 15 ceramics synthesized via the conventional solid-state reaction route has been monitored over a wide range of electric field strengths (E 0 = 0.5-5 kV/cm). Dielectric ...
  • Raman scattering, microstructural and dielectric studies on Ba1-xCaxBi4Ti4O15 ceramics 

    Kumar, Sunil; Kundu, Swarup; Ochoa Guerrero, Diego A.; García García, José Eduardo; Varma, K.B.R (2012-10)
    Article
    Restricted access - publisher's policy
    Polycrystalline powders of Ba1−xCaxBi4Ti4O15 (where x = 0, 0.25, 0.50, 0.75 and 1) were prepared via the conventional solid-state reaction route. X-ray diffraction (XRD) and Raman scattering techniques have been employed ...
  • Relaxor ferroelectric behavior and structural aspects of SrNaBi 2Nb 3O 12 ceramics 

    Kumar, Sunil; Ochoa Guerrero, Diego A.; García García, José Eduardo; Varma, K.B.R (2012-04)
    Article
    Restricted access - publisher's policy
    The SrNaBi2Nb3O12 (SNBN) powder was prepared via the conventional solid-state reaction method. X-ray structural studies confirmed the phase to be a three-layered member of the Aurivillius family of oxides. The SNBN ceramics ...