Research
Prospects of Solar Power Satellite in Bangladesh
This paper is a quick study overview of the space solar power, its current status and the prospects of the implementation of Solar Power satellite (SPS) in Bangladesh. Collecting energy in space and to redirect it to Earth provides significant advantages in the continuity of supply with very little environmental impact. But, its development represents many challenges both technically and economically. Bangladesh is very close to launch its first communication satellite in space. It is proposed in this paper to integrate SPS module with that Satellite for providing the long time solution of the power crisis.
Design and Implementation of a Real-Time Automated ECG Diagnosis (AED) System
Automated ECG diagnosis (AED) & classification is essential to the timely diagnosis of potentially lethal heart conditions in clinical settings. In noisy environment, ECG feature extraction problem with considerable accuracy still remains open for research. Although, Wavelet Transform (WT) has been proved to be more prominent approach than any other conventional detection algorithms, but much abstruse to implement in commercial software. To reduce this implementation complexity, in this work, a combination of DWT and FFT-IFFT pair is proposed with Adaptive thresholding technique. MATLAB analysis supports this preprocessing and automatic detection idea in terms of accuracy. A software implementation of this AED system is presented here in .net framework which can be interfaced with any commercial ECG machine by changing some parameters.
Towards High Efficiency Solar Cells: Composite Metamaterials
Classification & Applicability of various metamaterials found to be promising in designing high efficiency solar cells. Also light absorption & polarization of electromagnetic energy have been found very prominent in case of metamaterials. Theoretical modeling of metamaterial solar cell has been developed in this study to achieve high efficiency. Hence, composite metamaterials have been investigated and metamaterial property like negative refractive index has been thoroughly studied. It has been found that if anti-reflective coating of solar cell is made of metamaterial, and its refractive index is 1 then no reflection occurs and the efficiency increases without any polarization effect. Also it has been realized that by using sawtooth structure in the second layer of metamaterial solar cell, the band gap can be tuned thus covering the whole solar spectrum and increasing efficiency. The simulation of the proposed model has been done utilizing PC1D, Wx AMPS and Matlab. Metamaterial solar cell shows promising future and this research work can be successfully used to design & develop metamaterial based highly efficient solar cells
