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Is SARS CoV-2 a multifractal?
Sankaranarayana Iyer Sankararaman, Vimal Raj, S. Sreejyothi, Mohanachandran Nair Sindhu Swapna, 2021, izvirni znanstveni članek

Opis: A first report of unveiling the fractality and fractal nature of severe acute respiratory syndrome coronavirus (SARS CoV-2) responsible for the pandemic disease widely known as coronavirus disease 2019 (COVID 19) is presented. The fractal analysis of the electron microscopic and atomic force microscopic images of 40 coronaviruses (CoV), by the normal and differential box-counting method, reveals its fractal structure. The generalised dimension indicates the multifractal nature of the CoV. The higher value of fractal dimension and lower value of Hurst exponent (H) suggest higher complexity and greater roughness. The statistical analysis of generalised dimension and H is understood through the notched box plot. The study on CoV clusters also confirms its fractal nature. The scale-invariant value of the box-counting fractal dimension of CoV yields a value of 1.820. The study opens the possibility of exploring the potential of fractal analysis in the medical diagnosis of SARS CoV-2.
Najdeno v: ključnih besedah
Povzetek najdenega: ...A first report of unveiling the fractality and fractal nature of severe acute respiratory...
Ključne besede: Fractality, SARS CoV, Coronavirus, Fractal dimension, Multifractal
Objavljeno: 30.06.2022; Ogledov: 451; Prenosov: 0
.pdf Polno besedilo (1,48 MB)

The efflorescent carbon allotropes: Fractality preserved blooming through alkali treatment and exfoliation
Swapna Mohanachandran Nair Sindhu, Sankararaman S, 2020, izvirni znanstveni članek

Opis: The work reported in the paper elucidates morphological modification induced nanoart and surface area enhancement of graphite, graphene, and soot containing carbon allotropes through ultrasonication and alkali-treatment. The field emission scanning electron microscopic (FESEM) analysis of the samples before and after exfoliation reveals the formation of brilliant flower-like structures from spindle-like basic units due to Ostwald ripening. The x-ray diffraction analysis of the samples gives information about structural composition. The fractal analysis of the FESEM images indicates a multifractal structure with the dimensions—box-counting dimension D0 (1.72), information dimension D1 (1.66), and correlation dimension D2 (1.63)—preserved upon exfoliation. The process of ultra-sonication assisted liquid phase exfoliation resembles blooming as if the carbon allotropes are efflorescent.
Najdeno v: ključnih besedah
Ključne besede: carbon allotropes, fractal dimension, soot, fractality, alkali treatment, exfoliation
Objavljeno: 04.07.2022; Ogledov: 423; Prenosov: 0
.pdf Polno besedilo (8,02 MB)

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