in contrast to adults in many firefly species are able to control their biochemical reaction in order to emit high and discrete flashes. The light production of a firefly is initialized by the signal originating within its nervous system. In most cases, the first signallers are flying males, who try to attract flightless females on the ground or surrounding them. The responses to these signals are given by the females in terms of emitting continuous or flashing lights. Females are attracted according
also has some disadvantages such as the physical contact between the specimen surface and bombarding ball causes higher surface roughness to the component, which will be more severe in the case of soft materials and the process is not advisable if surface finish is mandatory. The accessibility of shots in the case of components having complex geometry is another difficulty in performing shot peening. Optimization of shot peening process has been developed by selecting suitable shot velocity, size,
Chapter 1 INTRODUCTION Diesel engine is a very popular prime mover used for surface transportation, agricultural machinery needs and in industries. Diesel engines of more than 6.5 million units are being used only in the Indian agricultural sectors for different activities and the import of petroleum products is a major draw off on our foreign exchange sectors and with increasing demand in future years the condition is likely to become worse. Hence, it is an urgent need for a country like India