The study was undertaken to compare the micro ear anatomy of three commonly available animal models which are expected to have similar anatomy to human and to find out suitable model among them as an alternative for human cadaver temporal bone dissection. This is an observational study of comparison of micro ear anatomy of the three animal models with human. Decapitated heads of cattle, pig and sheep were collected from slaughter houses, soft tissues along with brain were removed and preserved in commercially available formalin preservative. CT scan was taken for the three specimens and 3D reconstructions were done. Each specimen was subjected to micro dissection and the anatomical features were studied and compared with human. Among the three animal models sheep is found to be an ideal model for a beginner because of ease of exposure of bone, very thin cortical bone, and no cellularity, good exposure of all the middle ear structures and similar interrelations of middle ear structures with human. Pig may not be an ideal model because of abundant fatty soft tissues, thick periosteum very narrow space occupied by the middle ear, difficulty in accessing cellularity small fragile ossicular chain and overhanging facial nerve.
The study focuses on examining the price discovery process, short run disturbances and hedging mechanism of agricultural and metal commodities futures market for the period January 2010 to December 2018. Contango and normal backwardation have also been taken into deliberation for select commodities which are traded in MCX and NCDEX, India which is a valuable addition to the existing body of literature in derivatives market. Johansen’s co-integration, VECM, Granger causality test and OLS are employed for understanding the price discovery and constant hedging for select commodities. Further, existence contango and normal backwardation have been observed by comparing the spot and futures prices. It has been found that spot market is acting as a leader in the longer period and laggard in short run investors can be benefitted to take short run or long run investment decision.
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