Aluminum matrix composites reinforced with boron carbide are currently employed in the nuclear industry. It's used as a control rod in nuclear reactors; Since B C has very high absorption cross section for
Recommender systems have been introduced to provide a solution to navigating the huge volume of information already available and growing at an explosive rate. The amount of information available in electronic form, such as news, movies, books, advertisements and other online information is overwhelming us. Recommender systems are computerbased techniques that can be utilized to efficiently
This work owes its importance to the fact that it aims at knowing and measuring the concentrations of alpha-particles emitters discrete by the human body in the urine in particular. Knowledge of these concentrations is extremely important since it reveals whether a person has received such doses of radioactive materials emitting alpha-particles that result in the occurrence of malignant tumor and mutations.
The recent study deal with the structural and optical properties of Al 2O3 thin films prepared by the chemical spray pyrolysis technique at glass substrate(450°C) and studying the effect of annealing at different temperatures (500,550,600) °C on the optical properties.The results of X-ray diffraction showed that the prepared films are polycrystalline, the study of optical properties included the record of transmittance spectrum of the films with the wavelengths range from (300-900)nm, and then measuring the forbidden energy gap of electronic transitions w
This research intents to design Bidirectional Converter that can be used in wide applications from uninterrupted power supplies (UPS),photovoltaic (PV) and battery charging and discharging system, to
The study of the effect of some factors on the human is difficult and complex because of the lack of instruments for measuring eye efficiency. The human eye is an optical organ, its work is similar to the camera work, but the eye can not return the image which it makes, but the camera can return. Producing high quality image by human optical system like other lens system is affected by many parameters, some of them are internal such as aberrations and age, pigmentation.
Metal-semiconductor (M-S) junctions are prepared in this study by thermal evaporation technique, in which we used indium (In), silver (Ag) and gold (Au) films and aluminum (Al) films. The Al/c-Si/In, Al/c-Si/Ag and Al/c-Si/Au diodes heat treated at different annealing temperatures 303,373 and 473 K.
The spying and intrusion operation had been widely spread to steal the information especially with the development of computer networks (like,Internet). To prevent this danger the development of a new technology called “digital information hiding” was developed in such a way that the intruder cannot notice the existence of secret information in the media.In this project an image steganograph system is introduced. The proposed system is based on using the affine transform to represent the blocks of the secret image in terms of the blocks of the cover image.
A computation investigation on the design of magnetic deflection and focusing system using the synthesis approach of optimization method has been done.
Computational program "Crystal-2" in Visual Basic 6.0 was designed and applied to identify the specification for three crystal structures includes the lattice parameters (a, b, c), the axial angles (α, β, γ), the Filling Factor(FF) foe CdS, the Average Grain Size (AGS) for CdS, and the Elastic Strain (ε) for CdS and CdTe.This program will give us a complete description on crystal structure for three crystal structures material by inserting a data which include the values of Miller indices (hkl), the diffracted angle (2θ) from ASTM data for cadmium sulfide, beryllium and compare the calcu
