Gamma ray shielding properties of borate glass samples containing oxides of lead and zinc are prepared by melt and quench technique and evaluated theoretically using XCOM computer software for gamma ray shielding properties. However, gamma ray shielding properties are discussed in terms of various calculated parameters such as half value layer, mean free path and mass attenuation coefficient. The calculated parameters are compared by the author with conventional shielding material concrete. FTIR studies are undertaken to investigate the various structural groups present in the prepared system. Furthermore, it was observed that the glass sample S1 posses minimum HVL value and maximum mass attenuation coefficient, It has been inferred that addition of lead improve the gamma ray shielding properties and simultaneously decrease the rigidity of the glass systems due to formation of non bridging oxygen. Gamma ray shielding properties of our glass systems have been compared with standard nuclear radiation shielding concrete.

In this paper, the enhancement-mode operation of the hetestructure of GaN/InN/GaN/In0.1Ga0.9N of the Metal Insulator Semiconductor High Electron Mobility Transistor (MIS-HEMTs) device having lnN-channel was investigated. The effect of scaling the device dimensions of Metal Insulator, such as the dielectric thickness of HfO2 and the channel lengths, on the electrical performances was analyzed and compared to the currently used heterostructure. The numerical simulation of synopsis TCAD used showed a significant improvement in the electrical properties of the device that achieved a threshold voltage (VT) = 0.828 maximum drain current of 1.77 A/mm V, transconductance (gm) of 2.29 S.mm −1 , lowest ON-state resistance (RON) of 0.21 Ω.mm, and along with high-frequency performance achieving fT/ fmax of 98 GHz/129 GHz and 200 GHz/ 360 GHz respectively. The simulations also showed that this scaled GaN/InN/GaN/In0.9Al0.1N heterostructure MIS-HEMT is an excellent substitute to the currently used MIS-HEMTs for delivering high power density and frequency at RF/power amplifier applications.

ZnO and Ni 0.2 Co 0.1 Zn 0.7 O nanoparticles were successfully synthesized by microwave assisted combustion synthesis method using urea as a fuel. The structural, morphological, compositional and Magnetic property of Ni 0.2 Co (XRD), Scanning electron microscopes (FE (EDX), and quantum design Vibrating sample magnetometre structural property showed the formation of Wurtzite structure of ZnO,with nine prominent peaks in which the strong diffraction peaks appear in (100), (002) and (101), respectively, there is a trace related to Ni ions observed. The average size of these nanoparticles was estimat which show that there is a little decrease in the average size of the particles compared to ZnO. Scanning electron microscopes (SEM) showed that the samples have sizes smaller than 100nm, no indication of phase separation and little agglomeration was o spectroscopy (EDX) results tallies with the synthesis results. Magnetic measurement at all temperature the sample present a ferromagnetic behavior with a clear S shape hysteresis loop however the behavior is dec room temperature ferromagnetic behavior was maintained.