Chaos Theory: An Emerging Tool for Arrhythmia Detection
AbstractThe heart is an important muscular organ of the human body which pumps blood throughout the body. It is essential for human life. Timely and accurate assessment of the functioning of the heart has great relevance for reducing the death rate due to cardiac diseases around the world. If the heart is not able to pump blood smoothly, then heart diseases are likely to appear. These heart diseases are known as arrhythmia. Electrocardiogram (ECG) is a diagnostic tool for assessing the functioning of heart non-invasively. It not only detects cardiovascular diseases, but also examines breathing pattern and mental stress. EC...
Source: Sensing and Imaging - February 11, 2020 Category: Biomedical Engineering Source Type: research
Intelligent Integration of Neutron, Density and Gamma Ray Data for Subsurface Characterization
In this study, a real time decision level fusion system uses fuzzy logic approach is introduced to incorporate neutron, density, and gamma-ray information in order to provide more specific interpretation of the subsurface structures. Results of the proposed approach agreed well with the results of an offline subsurface determination program, with an average ratio of about 89.75%. The suggested approach was evaluated against real data from eight wells, and the results were promising to yield more objective interpretation. (Source: Sensing and Imaging)
Source: Sensing and Imaging - February 5, 2020 Category: Biomedical Engineering Source Type: research
Tone Mapping High Dynamic Range Images by Hessian Multiset Canonical Correlations
AbstractTone mapping algorithms reproduce high dynamic range (HDR) images on low dynamic range images in the standard display devices such as LCD, CRT, projectors, and printers. In this paper, we propose a statistical clustering-based tone mapping technique that would be able to adapt the local content of an image as well as its color. At first, the HDR image is partitioned into many overlapped color patches and we disintegrate each color patch into three segments: patch mean, color variation and color structure. Then based on the color structure component, the extracted color patches are clustered into a number of cluster...
Source: Sensing and Imaging - January 19, 2020 Category: Biomedical Engineering Source Type: research
Novel Neural Network Based CT-NSCT Watermarking Framework Based upon Kurtosis Coefficients
AbstractIn the research presented here, the novel neural network based watermarking framework is investigated in the area of transformation, while contourlet transform and nonsubsampled contourlet transform are realized to address the proposed idea via the Kurtosis to choose the band of suitable coefficients. It is to note that there are a number of techniques to deal with the aforementioned watermarking framework through the new integration of contourlet transform and nonsubsampled contourlet transform in connection with the perceptron neural network to extract the logo information, appropriately. There is the optimizatio...
Source: Sensing and Imaging - December 17, 2019 Category: Biomedical Engineering Source Type: research
Application of Digital Processing in Relic Image Restoration Design
AbstractCultural relic is the carrier of human historic culture, which can reflect the cultural and social environment, but cultural relics as a material will be damaged over time. Before the advent of computer technology, the damaged cultural relics would not be repaired due to cost. Computer vision technology has been applied to the restoration of cultural relics, mainly for the virtual restoration of damaged cultural relics images. This paper briefly introduced the Criminisi image restoration algorithm and the structure tensor used to improve the algorithm in the digital cultural relics image restoration. A damaged cult...
Source: Sensing and Imaging - December 13, 2019 Category: Biomedical Engineering Source Type: research
New Plasmonic Biosensors for Determination of Human Hemoglobin Concentration in Blood
AbstractTwo new types of plasmonic biosensors are applied for detection of hemoglobin concentration in human blood by using the angular interrogation method. The first type of the fiber with five layers is made by a SiO2 core surrounded by GaP, gold, Al2O3 and hemoglobin layers. The second type of the fiber with six layers is made by a ZBLAN core surrounded by NaF, silicon, silver, Al2O3 and hemoglobin layers. For some thicknesses of the interior layers and for a hemoglobin concentration close to the mean value of a male human at a laser wavelength (1.53 μm), a large figure of merit and maximum value of the amplitude se...
Source: Sensing and Imaging - December 10, 2019 Category: Biomedical Engineering Source Type: research
Coverage Maximization in Wireless Sensor Networks Using Minimal Exposure Path and Particle Swarm Optimization
AbstractThe fundamental objective of deploying wireless sensors is to monitor a physical condition(s) within the desired region and relay the measured data to the interested parties through a gateway. However, achieving maximum coverage over the desired area after the initial random deployment of nodes is likely impossible. Arbitrary paths become exposed, uncovered by any of the sensor nodes questioning the quality of service of the network. In our proposed coverage maximization scheme, exposure profiles of sensor nodes were used by the sink node to compute the minimal exposure path. A combination of the computed minimal e...
Source: Sensing and Imaging - December 6, 2019 Category: Biomedical Engineering Source Type: research
Reversible Image Steganography Using Dual-Layer LSB Matching
The objective of the proposed work is to enhance the embedding efficiency (EE) using dual-layer based embedding strategy and to curtail the distortion caused to the stego-image to improve its quality. At the first layer of embedding, each pixel conceals two bits of information using the proposed modified LSB matching method to produce the intermediate pixel pair (IPP). Further, the IPP is utilized to conceal four bits of information during the next layer of embedding. Experimental study reveals that, the proposed method can embed 1,572,864 bits of secret data with peak signal-to-noise ratio (PSNR) of 47.86 dB, 48.05 dB,...
Source: Sensing and Imaging - December 3, 2019 Category: Biomedical Engineering Source Type: research
A Robust Pan-Sharpening Scheme for Improving Resolution of Satellite Images in the Domain of the Nonsubsampled Shearlet Transform
AbstractPan-sharpening is a substantial post-processing task for captured multispectral remotely sensed satellite imagery. Its main purpose is to fuse the high spectral characteristics of the multispectral (MS) images with the high spatial information of the panchromatic (Pan) image to output a sharper MS image (pan-sharpened) that encompasses higher spectral and spatial resolutions. In this paper, we investigate a conception of a new pan-sharpening scheme using the pulse coupled neural network (PCNN) in the nonsubsampled shearlet transform (NSST) domain. This can be done based on two main steps. In the first step, the inp...
Source: Sensing and Imaging - December 3, 2019 Category: Biomedical Engineering Source Type: research
Design and Simulation of a High Sensitive Surface Plasmon Resonance Biosensor for Detection of Biomolecules
AbstractIn this paper, a surface plasmon resonance (SPR) biosensor based on black phosphorus (BP) –WSe2 coated metal surface for the detection of biomolecules is designed and simulated. The reported sensor configuration consists of a prism (SF10 glass), ZnO (zinc oxide), gold (Au), WSe2–BP, and sensing medium. The execution parameters including sensitivity, detection accuracy, and quality factor of the proposed sensor are explored at an operating wavelength of 633 nm. The angular interrogation method is used for the reflectance spectra analysis. The overall simulation is perfor med by COMSOL multiphysics (5.3a). Numer...
Source: Sensing and Imaging - December 3, 2019 Category: Biomedical Engineering Source Type: research
A Pulsed Thermal-Flow (PTF) Sensor Measures Velocity of Flow and Thermal Diffusivity
The objective of our development project was twofold: first, to realize a micro-sensor of low cost and ultra-low energy consumption that, secondly, accurately and rapidly measures gas flow velocities within a wide temperature range. The sensor of size 4.2 × 3.2 × 0.6 mm3 is of micro-beam type. It consists of one Joule heating element and several resistance thermometers at distinct distances from the heater. The heater is operated in a single short pulse mode of a fixed duration that can be chosen between 10 and 100 µs. Due to this ultra-short time of excitation, there is no natural convection during a run. F...
Source: Sensing and Imaging - November 5, 2019 Category: Biomedical Engineering Source Type: research
GPR Measurements with Advanced Isosurface Rendering Technique for Accurately Characterizing Subsurface Archaeological Structure at Al-Nadura Roman Temple in Egypt
AbstractThe application of modern visualization techniques (e.g., isosurface rendering) has been beneficial for the 3D presentation of ground penetrating radar (GPR) datasets, compared to the conventional time-slice imaging method, in order to facilitate GPR data interpretation. In this case study, we concentrate on how to apply isosurface rendering technique to easily interpret and highlight the spatial variations within GPR data in archaeological applications. Isosurface renders are generated from surfaces with equal amplitudes, which are illuminated in the 3D data volume using artificial light that reflects off the surf...
Source: Sensing and Imaging - October 27, 2019 Category: Biomedical Engineering Source Type: research
A Novel Biosensor Based on Micromechanical Resonator Array for Lab-On-a-Chip Applications
AbstractMechanical resonators are rarely reported to be used in liquid environment due to high damping. Most applications of mechanical resonators are related to their use in the gaseous environment. In this paper, a novel mass detective biosensor is proposed for Lab-On-a-Chip applications based on micromechanical resonator array. The sensor can be fabricated by MEMS technology such as standard Polysilicon Multi User MEMS Process (PolyMUMPs). The sensor consists of chained mechanically coupled resonators with electrostatic actuating elements and capacitive sensing elements on both sides. The sensor is suitable for digital ...
Source: Sensing and Imaging - October 16, 2019 Category: Biomedical Engineering Source Type: research
Facilitating Displacement of a Micro-scale Liquid Marble Using Electric Fields
AbstractThis paper discusses a novel theoretical treatment for facilitating displacement of a micro-scale liquid marble. It can be beneficial in designing microsensors as liquid-state micro accelerometers. In this work, the marble has been placed on the substrate under which the finger electrodes are located. The marble has been bounded with another rigid plate above it. To overcome the complexities of the marble displacement, initially, it has been deformed utilizing the electric field. This deforming electric field is generated via applying a sufficient DC voltage to the top, and bottom fixed plates. The electrostatic ma...
Source: Sensing and Imaging - September 22, 2019 Category: Biomedical Engineering Source Type: research
An Efficient Adaptive Interpolation for Bayer CFA Demosaicking
AbstractDemosaicking refers to the image processing of reconstruction full color image from the raw incomplete samples recorded by a single-chip image sensor. For most available demosaicking methods, the image edges are important cues to design the interpolation scheme, and the accuracy of edge estimation has great influence on the reconstructed image quality. In this paper, a block edge estimation method is proposed by considering all the color channels comprehensively. Based on the novel edge estimation method, the proposed algorithm firstly interpolates the G channel pixels with the guidance of the color correlation and...
Source: Sensing and Imaging - September 12, 2019 Category: Biomedical Engineering Source Type: research
