The article provides the results of a mathematical description of the distribution of contact stresses of a roll module with smooth rollers.Analysis of the developed models shows that when the rollers rotate, the maximum of the normal stress distribution diagram is displaced in the direction opposite to the movement of the material being processed;
Hydrocarbon exploration and production activities are basic to the functioning of the oil and gas industry, while concession contracts and fees are central concepts in the aforementioned activities.The authors consider several questions regarding these concepts, such as: what is the legislative, institutional, and fiscal framework in certain Europe
Abstract To understand the origin and early evolution of life it is crucial to establish characteristics of the primordial environment that facilitated the emergence and evolution of life.One important environmental factor is the pH of the primordial environment.Here, we assessed the pH-dependent thermal stabilities of previously reconstructed ance
Background/Objectives: Poxviruses are large DNA viruses that replicate in the host cytoplasm without a nuclear phase.As vaccine vectors, they can package and express large recombinant cassettes from different positions of their genomic core region.We present a comparison between wildtype modified vaccinia Ankara (MVA) and isolate CR19, which has si
This paper introduces a novel technique to enhance the gain of the basic monopole antenna by using broadband gradient refractive index (GRIN) metamaterial.The proposed GRIN is designed by using a parallel-line unit cell metamaterial with different refractive index.A seven GRIN lens is placed on the omnidirectional printed basic monopole antenna, pe