Chromium nitrate (CrNo3) doped PMMA films with concentration range of 0.5, 1.5, 2.5, and 3% mass fraction were prepared by the solution casting technique.Optical properties of these filmswere estimated by measuring absorption, transmission spectra in UV and visible range. From the absorption edge studies the values of optical band gap (Eopt) were calculated. It was found that such values decrease by increasing Cr content where as the values of the absorption edges were decreased.Moreover, the thermal characterization of prepared sample was studied under non-isothermal conditions. The procedure was applied to the experimental data obtained by differential scanning calorimetry (DSC), using a heating rate of 15K/min. In addition, from the heating rate of the prepared samples, the glass transition, Tg, melting point, Tm, and decomposed temperature were estimated. It was found that the glass temperature increased from 147 to 1690C with increasing CrNO3 ions from 0.5 to 3 mass %

In this paper product block technique is modified to solve nonlinear Volterra integral equations of the second kind when the kernel contains mild singularity. The product block by block method is modified by using two suggestions. Firstly we use Bool's quadrature rule which has high order of convergence. Secondly the Bool's block is adapted to use on graded nodes. To illustrate the effectiveness of the developed method a number of numerical examples are presented and a comparison with Simpson's product block by block is made.

The Spectrum of Antimony was recorded in the 300Ǻ- 2080 Ǻ wavelength range using a 3m normal incidence vacuum Spectrograph. Large number of configurations were investigated first time for odd parity and even parity system. Sixty-seven lines have been classified in this spectrum. The Hartree–Fock calculations with relativistic correction and least squares fitted parametric calculations were carried out using Cowan Code in order to interpret the spectrum satisfactorily”

In the study of high energy nucleus-nucleus collisions, observations on projectile fragments (PFs) have considerable advantages in comparison to target fragments (TF) as PFs can be more reliably identified and easily distinguished by the detectors. In this work, the experimental results of multiplicity and angular distribution of projectile fragments emitted from the collision of 24Mg beam with emulsion targets at 4.5 A GeV are reported . It is observed that the fragmentation mechanism differs considerably in smaller and larger mass systems

The electronic and magnetic structures of series of double perovskite oxides Ba2BB'O6, have been calculated by using the ab-initio linear muffin-tin orbital method with the atomic-sphere approximation (LMTO-ASA). The calculations were performed using the local spin density approximation with the coulomb interaction method (LSDA+U) in the framework of density functional theory (DFT). The results show that Ba2VHfO6 is half-metallic and Ba2CrTaO6 is conductor. The conduction bands in two compounds form mainly from the contributions of V (3d) and Cr (3d) elements. Ba2MnWO6 was found to be semiconductor, agreement with the results of J. Cheng and Z. Q. Yang. The ground magnetic phases for the first two compounds were found to be ferromagnetic while, the third was found to be antiferromagnetic material. These caused the hybridization between the V/Cr (3d) t2g spin up and Hf/Ta (5d) t2g spin up, and between Mn (3d) t2g spin up and W (5d) t2g spin down orbitals. The magnetic moments were found to be 1.39 μB for V4+, 0.35 μB for Hf4+, 2.79 μB for Cr3+, -0.46 μB for Ta5+, 4.41 μB for Mn2+ and -0.42 μB for W6+.

The spectrum of antimony was recorded in the 300 – 2080Ǻ region on a 3m normal incidence vacuum spectrograph, at the Physics Department, St. Francis Xavier University, Antigonish, Nova Scotia, Canada. The analysis is considerably extended to complete the configuration 5p6d, for the first time. All other reported levels of 5s5p3, 5p5d, 5p6s and 5p7s were also confirmed. The three transitions without good intensities at 95802.6, 93197.5 and 86066.8 cm-1 have been identified to establish the missing 5s5p3 1D2 level, fitting nicely into the least squares fitted calculations almost for all the reported levels of 5p6p, five of the 5p7p and two of the 5p4f, Beside that a few more levels with dual J values without any configuration assignment are also listed and I have tried to interpret these levels theoretically. The Hartree- Fock calculations with relativistic corrections using Cowan Codes for Sb II to get ab- initio energy parameters used in the level fitting calculations are used.