Nano Li-Ni ferrite samples having the structure Li were prepared by hydrothermal method in two sets from metal chlorides,ferrous sulfate and NaOH. Each set implicated varying x through 0, 0.1,0.3 to 1.0. The samples were without and with adding Fe0.5-0.5x2+. The ratio ofFe3+/ Fe2+ was kept at 1.7. The preparation temperature was 155 °C and pH was equal to 11.
The aim of the present work was to study the effect of alpha-particles, gammarays and (He-Ne) laser beam on the track registration and optical properties of CR-39 detectors. Twenty-four detectors divided into five groups. First group:include nine detectors were exposed to different powers of (1, 5 and 10 mW) of laser beam at times (5, 10 and 15 min) and then irradiated to alpha-particles from 226 Ra source.
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.
