scispace - formally typeset
Search or ask a question
Institution

Indian Institute of Technology Indore

EducationIndore, Madhya Pradesh, India
About: Indian Institute of Technology Indore is a education organization based out in Indore, Madhya Pradesh, India. It is known for research contribution in the topics: Fading & Support vector machine. The organization has 1606 authors who have published 4803 publications receiving 66500 citations.


Papers
More filters
Proceedings ArticleDOI
01 Nov 2014
TL;DR: D discrete wavelet transform is used for the time-frequency analysis of EEG signal and results show that the proposed method classifies EEG signals with excellent accuracy, sensitivity and specificity compared to the existing methods.
Abstract: Analysis of EEG is the primary method for diagnosis of epilepsy. In this paper discrete wavelet transform is used for the time-frequency analysis of EEG signal. Using discrete wavelet transform, EEG signal is decomposed into five different frequency bands namely delta, theta, alpha, beta and gamma. Only theta, alpha and beta carry seizure information. Statistical feature like energy, variance and zero crossing rate and nonlinear feature like fractal dimension is extracted from each of the three sub bands and fed to support vector machine classifier. Support vector machine classifies the input EEG signal into seizure free and seizure signal. Experimental results show that the proposed method classifies EEG signals with excellent accuracy, sensitivity and specificity compared to the existing methods.

41 citations

Journal ArticleDOI
TL;DR: In this article, the effects of a heteroatom at the meso position on the optical and electrochemical properties of the BODIPYs were studied, and the single-crystal X-ray structures of 2a,b and 3c,d showed interesting supramolecular interactions.

41 citations

Journal ArticleDOI
TL;DR: A theoretical line-shape function has been proposed for representing the observed Raman scattering spectrum from amorphous-Si-based on modified phonon confinement model framework and an empirical formula has been suggested using bond polarizability model for estimating the short-range order.
Abstract: Quantification of the short-range order in amorphous silicon has been formulized using Raman scattering by taking into account established frameworks for studying the spectral line-shape and size dependent Raman peak shift. A theoretical line-shape function has been proposed for representing the observed Raman scattering spectrum from amorphous-Si-based on modified phonon confinement model framework. While analyzing modified phonon confinement model, the term “confinement size” used in the context of nanocrystalline Si was found analogous to the short-range order distance in a-Si thus enabling one to quantify the same using Raman scattering. Additionally, an empirical formula has been proposed using bond polarizability model for estimating the short-range order making one capable to quantify the distance of short-range order by looking at the Raman peak position alone. Both the proposals have been validated using three different data sets reported by three different research groups from a-Si samples prepa...

41 citations

Journal ArticleDOI
TL;DR: In this article, a single crystal X-ray analysis of PTZTPE-1 reveals a twisted confirmation of tetra phenothiazine and TPE phenyl rings confirming strong AIE characteristics and reversible mechanochromic behavior.
Abstract: Mono and tetra phenothiazine (PTZ) functionalized tetraphenylethylene (TPE) derivatives PTZTPE-1 and PTZTPE-4 were designed and synthesized by the Suzuki cross-coupling reactions between PTZ boronate ester and bromo TPEs. The PTZTPE-1 and PTZTPE-4 are highly emissive in the solid state, which is crucial for a molecule to show mechanofluorochromism. The strong donor ability of PTZ could affect the donor ability of TPE leading to changes in the electronic and photophysical properties of the target molecules. The number of PTZ moieties attached to TPE could vary the twisting in the molecules, which could further affect the mechanochromic properties. The photophysical, electrochemical, solvatochromic, mechanochromic and AIE properties of PTZTPE-1 and PTZTPE-4 were studied. Both PTZTPE-1 and PTZTPE-4 show significant mechanochromic behavior and comparable spectral shift on grinding. The single crystal X-ray analysis of PTZTPE-1 reveals a twisted confirmation of PTZ and TPE phenyl rings confirming strong AIE characteristics and reversible mechanochromic behavior.

41 citations

Journal ArticleDOI
TL;DR: In this paper, the position-dependent power spectrum is used to estimate the bispectrum of the 21-cm signal from the epoch of reionization, and the correlation between the local power spectrum and the corresponding mean density of the subvolume is computed.
Abstract: The 21-cm signal from the epoch of reionization is non-Gaussian. Current radio telescopes are focused on detecting the 21-cm power spectrum, but in the future the Square Kilometre Array is anticipated to provide a first measurement of the bispectrum. Previous studies have shown that the position-dependent power spectrum is a simple and efficient way to probe the squeezed-limit bispectrum. In this approach, the survey is divided into subvolumes and the correlation between the local power spectrum and the corresponding mean density of the subvolume is computed. This correlation is equivalent to an integral of the bispectrum in the squeezed limit, but is much simpler to implement than the usual bispectrum estimators. It also has a clear physical interpretation: it describes how the small-scale power spectrum of tracers such as galaxies and the 21-cm signal respond to a large-scale environment. Reionization naturally couples large and small scales as ionizing radiation produced by galactic sources can travel up to tens of Megaparsecs through the intergalactic medium during this process. Here we apply the position-dependent power spectrum approach to fluctuations in the 21-cm background from reionization. We show that this statistic has a distinctive evolution in time that can be understood with a simple analytic model. We also show that the statistic can easily distinguish between simple "inside-out" and "outside-in" models of reionization. The position-dependent power spectrum is thus a promising method to validate the reionization signal and to extract higher-order information on this process.

41 citations


Authors

Showing all 1738 results

NameH-indexPapersCitations
Raghunath Sahoo10655637588
Biswajeet Pradhan9873532900
A. Kumar9650533973
Franco Meddi8447624084
Manish Sharma82140733361
Anindya Roy5930114306
Krishna R. Reddy5840011076
Sudipan De549910774
Sudip Chakraborty513439319
Shaikh M. Mobin5151511467
Ashok Kumar5040510001
Ankhi Roy492598634
Aditya Nath Mishra491397607
Ram Bilas Pachori481828140
Pragati Sahoo471336535
Network Information
Related Institutions (5)
Indian Institute of Technology Kharagpur
38.6K papers, 714.5K citations

95% related

Indian Institute of Science
62.4K papers, 1.2M citations

92% related

Nanyang Technological University
112.8K papers, 3.2M citations

92% related

Royal Institute of Technology
68.4K papers, 1.9M citations

90% related

University of Science and Technology of China
101K papers, 2.4M citations

90% related

Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
202365
2022253
2021914
2020801
2019677
2018614