A Review and Performance Analysis of Image Edge Detection Algorithms

Edge detection is the fundamental operation of digital image processing and applied in many fields like industrial, medical, satellite, agriculture etc. According to this growth of edge detection applications, many researchers and scholars are interested to develop the edge detection algorithm by using various techniques. This paper illustrates the review for what are the novel techniques are used for the edge detection, which operators are mostly used by them and how they get the accurate results to compare with existing methods. It also discussing the performance analysis of most commonly used edge detection operators such as Canny, Laplacian Gaussian (LoG), Sobel, Prewitt and Roberts,. Finally the accuracy, PSNR (Peak Signal to Noise Ratio) and execution time are tabulated and realize the most precious and fast computed edge detection method is uncovered

Effect of fibre composition on essential properties of needle-punched nonwoven fabrics as secondary layer for composite wound dressings

Suitability of viscose, bamboo, cotton and polyester fibres as a secondary layer for wound dressing application hasbeen analysed. The needle-punched nonwovens of the selected fibres in seven different combinations, namely 100% viscose,70/30 viscose/bamboo, 70/30 viscose/cotton, 70/30 viscose/polyester, 30/70 viscose/bamboo, 30/70 viscose/cotton and30/70 viscose/polyester have been used for the study. These nonwovens are compared for their properties like mass per unitarea, thickness, air permeability, tensile strength, elongation, water vapor transmission rate, rate of absorption, absorbency,vertical wicking, dehydration rate, and antibacterial efficacy against S.aureus and E.coli. From the obtained results, based onthe importance of wound dressing characteristics, 70/30 viscose/bamboo needle-punched nonwoven is found to be moreuseful as a secondary layer for wound dressing. The dressings maintain the suitable moisture conditions around the woundsurface, preventing the desiccation. The usage of developed nonwovens aids in rapid uptake and retention of wound fluid,which creates an optimum environment for rapid healing and inhibition of bacterial growth.

Chemical Characterisation of Bulk and Melt-spun Ribbons of NiMnIn alloy using Inductively Coupled Plasma Optical Emission Spectrometry

Method development for the analysis of NiMnIn, a new magnetocaloric effect (MCE) material using inductively coupled plasma optical emission spectrometry (ICPOES) is discussed. Spectral interference of Ni and Mn on the analysis of In were studied. The process of method validation was carried out using various analytical techniques like conventional wet chemical techniques and instrumental techniques such as atomic absorption spectrometry. All the techniques show a close agreement in values, thus this method could be applied for regular analysis of NiMnIn alloys. A comparative chemical analysis of bulk and melt-spun ribbons of this alloy is also discussed.Defence Science Journal, 2011, 61(3), pp.270-274, DOI:http://dx.doi.org/10.14429/dsj.61.39

Effect of Ag+ ion Concentration on the Reaction Kinetics and Shape of Nanoparticles Synthesised by Green Chemical Approach

The effect of varying Ag+ ion concentration on the green chemical reaction with a fixed tea aliquot concentration has been studied in detail with the help of UV-visible absorption spectra. With increase in the concentration of Ag+ solution the position of surface plasmon band systematically increased from 435 nm – 450 nm. The reaction followed first order kinetics and the rate of reaction increased in a linear fashion with k = 3.54 x 10-4 min-1 for 0.5 mL to k = 1.86 x 10-3 min-1 for 3.0 mL Ag+ solution. X-ray diffraction patterns showed an enhanced (200) reflection for 3.0 mL Ag sample. The shape of Ag nanoparticles could be effectively tuned from spherical to cuboid with increase in silver content as evidenced from scanning electron and transmission electron micrographs. The average particle size of Ag NPs increased from 25 nm to 55 nm with increase in the Ag+ content of the reaction

Indoleamine 2,3-dioxygenase 1 activation in mature cDC1 promotes tolerogenic education of inflammatory cDC2 via metabolic communication

Conventional dendritic cells (cDCs), cDC1 and cDC2, act both to initiate immunity and maintain self-tolerance. The tryptophan metabolic enzyme indoleamine 2,3-dioxygenase 1 (IDO1) is used by cDCs in maintaining tolerance, but its role in different subsets remains unclear. At homeostasis, only mature CCR

Altered compensatory cytokine signaling underlies the discrepancy between Flt3–/– and Flt3l–/– mice

The receptor Flt3 and its ligand Flt3L are both critical for dendritic cell (DC) development, but DC deficiency is more severe i

Cis interactions in the Irf8 locus regulate stage-dependent enhancer activation

Individual elements within a superenhancer can act in a cooperative or temporal manner, but the underlying mechanisms remain obscure. We recently identified a