Novel Area Effective Designs for Full-Adder & Full-Subtractor using QCA -- Study of All-Optical Directional Coupler Based on Holes in Slab Photonic Crystal Structure -- All-Optical Feynman Gate using Frequency Encoding Scheme, Add/drop Multiplexer and Reflective Semiconductor Optical Amplifier with Simulative Verification -- Effects of Dimensional Variations on Short Channel Parameters in 14 nm Channel Length TG-SOI FinFETs -- Dibit-Based 4-bit Parity Generator using Reflective Semiconductor Optical Amplifier and Frequency Encoding Scheme -- Design and Implementation of an Efficient QCA based Multilayer Multi-Bit Parallel Shift Register Using Reversible Level-Sensitive 'D' flip-flop -- A 12-bit Low Power 50MS/s SAR ADC Optimized for Speed and Power in 45nm CMOS Technology -- Decision Tree-based Classification of sEMG and Accelerometer Data of Sign Language -- Bibliometric Analysis of Published Literature on Mobile Healthcare in the Past One Decade -- Shetkari Mitra App, An Application to Maximize the Profit of Farmers.