Structural and Optical Properties of Lead Iodide Thin Films Prepared By Vacuum Evaporation Method

Structural and optical properties were studied as a function of films thickness for thermally evaporation PbI2 films. X-ray diffraction analysis confirmed that PbI2 films are polycrystalline having hexagonal structure. The optical absorption data indicate an allowed direct transmission with optical energy gap varies continuously from ( 2.15eV to 2.33eV) . The energy gap shows thickness dependence, which can be explained qualitatively by a thickness dependence of grain size through the decrease of the grain boundary barrier height with grain size. The low fluctuation in energy gap indicates that the grain size is quite small, which is finding in agreement with AFM results

Web based support for pregnant mother

This paper reports on a work on progress. A web-based system has been developed to ensure pregnant mothers be notified regarding their pregnancy progress.The design and development of the system which is named Pregnancy Progress System (PregProSyst) are outlined.In addition, an initial test with potential users including pregnant mothers and healthcare practitioners is also discussed. It is found that potential users agree that PregProSyst is good for them and they are happy to use the system