• M B Sureshkumar

      Articles written in Pramana – Journal of Physics

    • Estimation of rotational temperature of121Sb16O molecule

      M B Sureshkumar N R Shah Ashish Jaituni

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      The (0,1), (0,0), (1,0) and (2,0) bands ofBX system of antimony monoxide have been excited in rf discharge tube source and photographed in the 9th order of a two metre plane grating spectrograph (PGS-2). Intensity records of the rotational lines have been obtained. The intensity measurements ofQ andP branch lines of the above four bands andJ numberings are used to estimate the effective rotational temperature of the source emitting the spectrum of121Sb16O molecule. It is concluded that121Sb{su16}O may be present inK type stars.

    • Polarized spectral features of human breast tissues through wavelet transform and principal component analysis

      Anita Gharekhan Ashok N Oza M B Sureshkumar Asima Pradhan Prasanta K Panigrahi

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      Fluorescence characteristics of human breast tissues are investigated through wavelet transform and principal component analysis (PCA). Wavelet transform of polarized fluorescence spectra of human breast tissues is found to localize spectral features that can reliably differentiate different tissue types. The emission range in the visible wavelength regime of 500–700 nm is analysed, with the excitation wavelength at 488 nm using laser as an excitation source, where flavin and porphyrin are some of the active fluorophores. A number of global and local parameters from principal component analysis of both high- and low-pass coefficients extracted in the wavelet domain, capturing spectral variations and subtle changes in the diseased tissues are clearly identifiable.

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