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In this paper, Carry Select Adder (CSA) architecture are proposed using parallel prefix adder. Instead of using 4-bit Ripple Carry Adder (RCA), parallel prefix adder i.e., 4-bit Brent Kung (BK) adder is used to design CSA. Adders are key element in digital design, performing not only addition operation, but also many other function such as subtraction, multiplication and division. Ripple Carry Adder (RCA) gives the most complicated design as-well-as longer computation time. The time critical application use Brent Kung parallel prefix adder to drive fast results but they lead to increase in area. Carry Select Adder understands between RCA and BK in term of area and delay. Delay of RCA is larger therefore we have replaced it with Brent Kung parallel prefix adder which gives fast result. Power and delay of 4-bit RCA and 4-bit BK adder architecture are calculated at different input voltage. This paper describes comparative performance of 4-bit RCA and 4-Bit BK parallel prefix adder designed using TANNER EDA tool.

Solar inverters are mainly classified as voltage source based solar inverter and current source based solar inverter. The comparison of voltage source inverter (VSI) and current source inverter (CSI) is presented in this paper. Conventional CSI generate high earth leakage current into the grid. Therefore, conventional CSI requires an intermediate isolation transformer to feed power to the grid. The use of transformer makes the system bulky. To overcome these limitations, a modified CSI without transformer is analyzed from reliability point of view in this paper. The failure rates, Mean Time Between Failures (MTBF) and hence the reliability of various components of conventional VSI, CSI and proposed CSI are calculated using methods discussed in Military Handbook (MILHDBK 217F). It is found that conventional CSI is more reliable than VSI as it requires smaller dc link capacitor.The failure rate for proposed CSI is found to be less compared to conventional CSI, thus MTBF and reliability of proposed transformer less CSI is more than conventional CSI and VSI. The reliability of these inverters is calculated in benign environment.

To meet increasing Energy demand, depleting Fossil Fuel and environmental problems caused by conventional power generation, renewable energy sources such as solar photovoltaic (PV) are becoming more attractive alternatives to replace conventional generation. Power electronic systems are essential to utilize and develop renewable energy sources. In solar PV applications, utilizing maximum power from the source is one of the most important functions of the power electronic systems. The proposed work presents the comparison of Voltage Source Inverter (VSI) and Current Source Inverter (CSI) with MOSFET and IGBT then THDs and Reliability of the PV inverters for solar systems are measured. Reliability Curves and MTBF plots are studied, simulated and analyzed. The simulation of the system is carried out in the MATLAB environment.

We propose a new ultrasonic image analysis system that can be utilized as an effective tool in classifying liver states as normal, hepatitis, or liver cirrhosis. In this system, we first define suitable settings for the ultrasonic device, then remove the inhomogeneous structures from the area of interest in the image, and then, by using the forward sequential search method, look for the useful texture parameters from the co-occurrence matrix, the statistical feature matrix, the texture spectrum, and the fractal dimension descriptors. Finally, the selected parameters are fed into three different classifier i.e. MLP NN, RBF network and SVM(support vector machine) for the classification of liver disease.