Shark teeth discovered in the late Paleocene-early Eocene Chehel-Kaman Formation in NE Iran bring new data on the fossil fish record from this country.Two genera from the location JORDAN 1 are described and figured.The present record is one of the very few reports of fossil shark teeth from the Cenozoic of Iran and the first one from this formation
In recent years, new concepts of acoustic absorbers dedicated to the reduction of low-frequency noise have been developed.Among them, liners with moving parts, such as membrane-based liners, have been an object of particular interest.In the present paper, we propose a liner concept based on a cantilever beam made of articulated plates with micro-sl
In view of Day and Night Cream problem that scheme of single preventing override trip and scheme of preventing override trip of surface power system cannot solve underground override trip fault effectively, the paper proposed a scheme that using power monitoring system to solve Rice Bowl underground override trip fault.Taking power network of Henan
Male Xenopus laevis frogs have been observed to clasp other males in a sustained, amplectant position, the purpose of which is unknown.We examined three possible hypotheses for this counter-intuitive behavior: 1) clasping males fail to discriminate the sex of the frogs they clasp; 2) male-male clasping is an aggressive or dominant behavior; or 3) t
Microbial activity in clay barrier materials during radioactive waste disposal can lead to a violation of important physicochemical properties of the barrier system as a whole, thereby reducing the safety of the storage facility.This work evaluates the activity of the microbial complex of five bentonite and two kaolin clays.All clay materials were