<p><span>DC-DC converters are devices which convert direct current (DC) from one voltage level to another by changing the duty cycle of the main switches in the circuits. These converters are widely used in switched mode power supplies and it is important to supply a constant output voltage, regardless of disturbances on the input voltage. In this work, the performance of three different converters such as Single-Ended Primary-Inductance Converter (SEPIC), Luo converter and ZETA converter have been analyzed. Further, the parameters values such as ripple voltage, switching losses and efficiency of the proposed three different converters were compared with each other. Also, the simulation work has been carried out using MATLAB/SIMULINK software. From the comparison of obtained results, it is observed that the ZETA converter has high significance than the SEPIC and Luo converter.</span></p>

The paper presents the results of an investigation on steel-concrete composite beam subjected to static loading. An experimental investigation and analytical study using finite element analysis (FEA). The load carrying capacity of the steel-concrete composite beam is presented. The steel-concrete composite beam is embedded with 19 mm stud shear connector. The interaction of steel-concrete layers of composite beam with headed stud shear connector due to the application of flexural load is analysed. The experimental results are compared with those of analytical modelling using ANSYS 10.Biographical notes: Currently, B. Raguvaran Balasubramanian doing research in the area of steel-concrete composite structures based on this, he has published more than three international journals in various publications based on research area in structural engineering and construction engineering.Rajaram Baskar has been acquired experience in the design of steel structures. He has completed his PhD in the year 2005, he is working as a Professor at Annamalai University, one of the famous institution in India and all over the world. He has published more number of international journals in various publication based on research area in structural engineering and construction engineering and he has conducted national conferences about technical study and design of various types of structures. And now, he is also guiding to the PhD research scholar in his area effectively and technical oriented subjects.

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The paper presents the results of an investigation on steel-concrete composite beam subjected to static loading. An experimental investigation and analytical study using finite element analysis (FEA). The load carrying capacity of the steel-concrete composite beam is presented. The steel-concrete composite beam is embedded with 19 mm stud shear connector. The interaction of steel-concrete layers of composite beam with headed stud shear connector due to the application of flexural load is analysed. The experimental results are compared with those of analytical modelling using ANSYS 10.