Study of Thermoelectric Generator for Harnessing of the heat energy wasted from automobiles and Thermal Power Plant

The ever growing huge demand for electricity needs is to be fulfilled with taking in consideration the environment factor. Thus, recycling of energy must be done as effectively as possible. Harnessing of the heat energy wasted from automobiles, industries, domestic appliances etc. all of which can generate power is proposed in this paper. Industries and automobile sector is the main source for the supply of waste heat which can generate power that can be further used for powering various accessories thus increasing the overall efficiency of the system itself. Technology under study in this paper for waste heat recovery is called TEG which stands for Thermo Electric Generators based on the See beck effect. TEG is a device which makes use of the temperature gradient across it to generate an electromotive force (EMF). TEGs are most suitable for waste heat recovery applications due to lack of mechanical parts, low maintenance and high durability and are proved in space missions over the past decades. The focus of this paper is to study characteristics of TEG and factors affecting its performance in turn reducing the environmental impact. Power generation from automobile and thermal power plant and accordingly future scope can be defined

Relativistic calculations of the lifetimes and hyperfine structure constants in 67^{67}Zn+^{+}

This work presents accurate {\it ab initio} determination of the magnetic dipole (M1) and electric quadrupole (E2) hyperfine structure constants for the ground and a few low-lying excited states in $^{67}$Zn$^{+}$, which is one of the interesting systems in fundamental physics. The coupled-cluster (CC) theory within the relativistic framework has been used here in this calculations. Long standing demands for a relativistic and highly correlated calculations like CC can be able to resolve the disagreements among the lifetime estimations reported previously for a few low-lying states of Zn$^{+}$. The role of different electron correlation effects in the determination of these quantities are discussed and their contributions are presented.Comment: 9 pages, 1 figure. submitted to J. Phys. B Fast Trac

DNA barcoding of selected Perciformes (Infra Class: Teleostei) fishes from Indian coast

315-321India has a rich aquatic biodiversity spreading across different ecosystems. Total 2358 endemic fish species have been reported from India comprising marine (1368) , brackish water (113) and freshwater fishes (877) . Marine fish identification is seldom difficult because of their high diversity and profound changes in appearance during their development stages. DNA barcoding technique has been successfully used to discriminate all animal taxa. In this study, DNA barcodes were generated for 32 species representing 13 families of the order perciformes. The average genetic divergence values for within species, genus and family were 0.42, 13.91 and 18.05%, respectively. The genetic divergence values increased several folds (15-20 times) from lower to higher taxa. Barcode gap analysis showed the absence of overlapping between intra and interspecific divergence values. Intraspecific variation has increased several folds (15-20 times) after including conspecific sequences from different geographical locations. Presence of allopatric lineages / cryptic species was observed in several fishes that have Indo-pacific region distribution. The neighbour joining (NJ) tree constructed based on mitochondrial cytochrome oxidase submit 1 kimura two parameter (COI K2P) values showed distinct clusters shared by congeneric species. Around 100 nucleotide diagnostic characters exclusive to Perciformes fish species were also identified