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TL;DR: In this article, the effects of zinc oxide nanoparticles on the structural and electrical properties of polyvinyl alcohol films were investigated by Fourier transform infrared spectroscopy, UV-visible (vis) spectra, X-ray diffraction and SEM techniques.
Abstract: This study has been conducted with the objective of investigating the effects of zinc oxide nanoparticles on the structural and electrical properties of polyvinyl alcohol films. The fabricated nanocomposites were characterised by Fourier transform infrared spectroscopy, UV–visible (vis) spectra, X-ray diffraction and SEM techniques. UV–vis spectra showed that the addition of ZnO nanoparticles did not affect the absorbance in the visible region of nanocomposites. The SEM image showed that ZnO nanoparticles were homogeneously dispersed throughout the entire film’s polymeric matrix. The dielectric properties were found to be strongly dependent on frequency and nanofiller content. AC conductivity σac of polyvinyl alcohol/ZnO nanocomposites increased with increasing frequency. The dissipation factor tan δ also increased with nanoparticle addition and decreased with frequency. At low nanofiller concentrations, nanocomposites exhibited low dielectric values at higher frequency, thus behaving like a lossl...
50 citations
19 Jan 2019
TL;DR: In this paper, controlled partial image encryption using LSIC and chaotic map is presented, in which image is divided into 16x16 blocks and entropy of each block is compared with threshold entropy from entropy selection table, if entropy of block is greater than predefined threshold entropy then that block is XORed with 16×16 random block generated by converting each row of LSIC into 16 × 16 block.
Abstract: Partial image encryption plays a vital role in the field of medical image encryption, because small amount of encryption leads to high security with low computation complexity. This paper presents controlled partial image encryption using LSIC and chaotic map. It consists of two methods. In method-1 image is divided into 16x16 blocks. Entropy of each block is compared with threshold entropy from entropy selection table. If entropy of each block is greater than predefined threshold entropy then that block is XORed with 16x16 random block generated by converting each row of LSIC into 16x16 block. In method-2 entropy of block greater than predefined threshold entropy then pixels within that block is shuffled using chaotic map. Based on different threshold entropy values different partial encrypted images are obtained. From the experimental results shows that proposed methods can controlled amount of encryption as per the requirements.
46 citations
TL;DR: In this article, a truncated Haar wavelet series was proposed for the computation of eigenvalues and solutions of Sturm-Liouville eigenvalue problems (SLEPs).
45 citations
TL;DR: A scheme for signal compression based on the combination of discrete FRFT (DFRFT) and set partitioning in hierarchical tree (SPIHT) and application to different types of signals demonstrates significant reduction in bits leading to high signal compression ratio.
41 citations
TL;DR: In this paper, Tetraethylorthosilicate incorporated hybrid poly(vinyl alcohol) membranes were grafted with glycidyltrimethylammonium chloride (GTMAC) in different mass%.
39 citations
Authors
Showing all 350 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Narasimha H. Ayachit | 15 | 104 | 703 |
| Arjumand A. Kittur | 14 | 17 | 807 |
| S. C. Shiralashetti | 13 | 45 | 493 |
| Varsha S. Joshi | 11 | 17 | 405 |
| A.A. Kittur | 11 | 12 | 673 |
| V.S. Yaliwal | 10 | 35 | 368 |
| Umakant P. Kulkarni | 10 | 65 | 372 |
| S. R. Biradar | 10 | 38 | 330 |
| Suresh Chavhan | 9 | 26 | 169 |
| Mrityunjaya V. Latte | 9 | 38 | 214 |
| P. S. Shivakumar Gouda | 8 | 29 | 206 |
| M.N. Kalasad | 8 | 9 | 212 |
| Satish S. Bhairannawar | 6 | 19 | 80 |
| G S Thyagaraju | 6 | 12 | 80 |
| V. S. Hegde | 6 | 11 | 107 |