Faculty Publications

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Publications by NITK Faculty

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    The limit of limits
    (School of Engineering and Technology, 2006) Babu Narayan, K.S.B.
    Throughout the history structural engineering has wrestled with the forces of nature and has accomplished the inspiring, daring and amazing feats of innovating structures of gigantic proportions. The tallest building on earth has crossed the 500m barrier and heights exceeding 800m are being ambitiously contemplated. Mind boggling spans for bridges are being suggested and possibilities are being investigated. At this most-happening juncture of time, this paper envisages to explore, with simple and familiar concepts, the limits of possibilities and the hurdles to be cleared to extend the limits. © 2006 by School of Engineering and Technology, Asian Institute of Technology.
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    Estimating multiple physical parameters from speech data
    (IEEE Computer Society help@computer.org, 2016) Kalluri, S.B.; Vijayakumar, A.; Vijayasenan, D.; Singh, R.
    In this work, we explore prediction of different physical parameters from speech data. We aim to predict shoulder size and waist size of people from speech data in addition to the conventional height and weight parameters. A data-set with this information is created from 207 volunteers. A bag of words representation based on log magnitude spectrum is used as features. A support vector regression predicts the physical parameters from the bag of the words representation. The system is able to achieve a root mean square error of 6.6 cm for height estimation, 2.6cm for shoulder size, 7.1cm for waist size and 8.9 kg for weight estimation. The results of height estimation is on par with state of the art results. © 2016 IEEE.
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    Study of Wireless Channel Effects on Audio Forensics
    (Institute of Electrical and Electronics Engineers Inc., 2018) Vijayasenan, D.; Kalluri, S.B.; Sreekanth, K.; Issac, A.
    In this work, we try to study the effect of a wireless channel on physical parameter prediction based on speech data. Speech data from 207 speakers along with corresponding speaker's height and weight is collected. A three path Rayleigh fading channel with typical values of Doppler shift, path gain and path delay is utilized to create the mobile channel output audio. A Bag of Words (BoW) representation based on log magnitude spectrum is used as features. Support Vector Regression (SVR) predicts the physical parameter of the speaker from the BoW representation. The proposed system is able to achieve a Root Mean Square Error (RMSE) of 6.6 cm for height estimation and 8.9 Kg for weight estimation for clean speech. The effect of Rayleigh channel increase the RMSE values to 8.17 cm and 11.84 Kg respectively for height and weight. © 2016 IEEE.
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    Iterative roots of PM functions extended from the characteristic interval
    (Birkhauser, 2023) Murugan, V.; Suresh Kumar, M.S.; Jarczyk, J.; Jarczyk, W.
    In this paper we consider the problem of finding iterative roots of order less than the number of forts of continuous piecewise monotone(PM) functions with nonmonotonicity height greater than one. We present sufficient conditions to extend iterative roots of PM functions from the characteristic interval which determines the behavior of the function under iteration. © 2023, The Author(s), under exclusive licence to Springer Nature Switzerland AG.