The outbreak of Corona disease, or the so-called Covid-19, has affected the course of human life. Detecting this disease early reduces the risk of spreading the disease. Thus, get rid of this epidemic sooner. In this paper, a system is created that helps to identify and detect Covid-19 disease through X-ray radiation. GoogLeNet, ResNet-101, Inception v3 network, and DAG3Net that are used for comparison purposes. Good results have been obtained in detecting Covid-19 disease, where the DAG3Net produces diagnostic (validation, training, testing and overall) accuracies of (96.15%, 94.34%, 96.75% and 96.58%) respectively, while the GoogLeNet, ResNet-101, and Inception v3 network are produced (98.08%, 100%, 99.59% and 99.72%) respectively.

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The four types of ferrites have been prepared by co-precipitation technique(Ni Zn Fe2O4,Mg Fe2O4,Mn Fe2O4, Cd Fe2O4). The prepared ferrites were sintered at 800C ̊. Then using the these types of ferrite to prepared the final Synthesis Nix Zn1-x-y My Fe2O4wereM2+=(Mg,Mn,Cd)with (X=0.3),(Y=0.4) to be six samples halve of these as pressed pellets (12.3 mm diameter, 5-4mm thickness) and later halve as triodes (Rin=9.85mm,Rout=19.4mm). All of them were sintered at (1100 °C) for (2 hr). (XRD) Technique was used to study the structure of matrix Nix Zn1-x-y My Fe2O4, the apparent density , and porosity were calculated, The electrical characteristics for these samples included the measure of A.C current as the dielectric constant was calculated (έ ) ,loses factor (tan δ) was measured at the same frequency range (20Hz - 3MHz) to calculate the imaginary part of dielectric constant and also the magnetic properties was measured by the same equipment, (initial permeability μ ) was calculate after measuring the inductors (L), the VSM Technique was used to study hysterics lope behavior of these samples.

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"Alumina nanoparticles was synthesized using sol-gel technique and the structural characteristics of these nanoparticles were investigated using AFM where found the size of particles about (80- 100 nm), and it has been studying the effect of these nanoparticles on photoluminescence (absorption and fluorescence) of Rh110 dye laser solution also doped it with non-organic media (ORMOSIL). FTIR analysis has been recorded to the final sample to investigate the vibrational mode of both the silica and the alumina bonds."