THE REQUIRED ACOUSTIC PARAMETERS SIMPLIFICATION OF INVISIBILITY CLOAKS AND CONCENTRATORS USING THE IMPEDANCE-TUNABLE COORDINATE TRANSFORMATION

The required acoustic parameters simplification of invisibility cloaks and concentrators using the impedance-tunable coordinate transformation

Abstract Transformation acoustics, as an unconventional theory, provides a powerful tool to design various kinds of acoustic devices with excellent functionalities.However, the required ideal parameters, which are prescribed by the method, are both complex and hard Eyeshadows to implement-even using acoustic metamaterials.Furthermore, simplified pa

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Is it possible to control bovine tuberculosis without compensation? Reviewing ten years of the Chilean program and its progress

Abstract In 2011, the Chilean bovine tuberculosis (bTB) program was launched by the Livestock and Agriculture Service (SAG) as a compulsory countrywide program based on testing and culling of bTB reactors at herd-owners expense.This review outlines the rationale and key components of the bTB program, and the dynamic Soup changes that have occurred

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