To meet the requirements of low frequency, high power, small size and light weight, a type of Class I barrel-stave flextensional transducer employing improved concave stave is presented.As the key component of flextensional transducer, concave stave plays an important role in vibrating efficiently to radiate acoustic energy.The structure of concave
The consumption of food products with low consumer properties is the reason for a decrease in a life quality as well as for a number of diseases development among the population.Meanwhile, the annual volume of confectionery production and Balance Board their consumption is increasing, which requires an expansion of the assortment in this group.A je
Abstract Background The presence of lymphoma in buffaloes was first reported in India in the 1960s.The disease is similar to Enzootic Bovine Leucosis (EBL) caused by Bovine leukemia virus (BLV) in cattle; however, according to our results and those of other studies, the etiology of these lymphomas in buffalo do not appear to be associated with BLV.
Abstract In this work we consider a simple model for dark matter and identify regions Clippers of parameter space where the relic abundance is set via kinematic thresholds, which open and close due to thermal effects.We discuss instantaneous freeze-out, where dark matter suddenly freezes-out when the channel connecting dark matter to the thermal ba