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10.1038/srep25320 http://scihub22266oqcxt.onion/10.1038/srep25320 C4850458!4850458!27125237     free     free     free Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Deprecated: Implicit conversion from float 211.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534       Sci+Rep 2016 ; 6 (ä): ä Nephropedia Template TP {{tp|p=27125237|t=2016. Transformation seismology: composite soil lenses for steering surface elastic Rayleigh waves |pdf=|usr=}}{{27125237}} gab.com Text Transformation seismology: composite soil lenses for steering surface elastic Rayleigh waves JO: Sci Rep http://www.kidney.de/pget.php?&tw=1&pmid=27125237 #FOAvip Metamaterials are artificially structured media that exibit properties beyond those usually encountered in nature. Typically they are developed for electromagnetic waves at millimetric down to nanometric scales, or for acoustics, at centimeter scales. By applying ideas from transformation optics we can steer Rayleigh-surface waves that are solutions of the vector Navier equations of elastodynamics. As a paradigm of the conformal geophysics that we are creating, we design a square arrangement of Luneburg lenses to reroute Rayleigh waves around a building with the dual aim of protection and minimizing the effect on the wavefront (cloaking). To show that this is practically realisable we deliberately choose to use material parameters readily available and this metalens consists of a composite soil structured with buried pillars made of softer material. The regular lattice of inclusions is homogenized to give an effective material with a radially varying velocity profile and hence varying the refractive index of the lens. We develop the theory and then use full 3D numerical simulations to conclusively demonstrate, at frequencies of seismological relevance 3?10?Hz, and for low-speed sedimentary soil (vs: 300?500?m/s), that the vibration of a structure is reduced by up to 6?dB at its resonance frequency. Twit Text FOAVip Transformation seismology: composite soil lenses for steering surface elastic Rayleigh waves ????Sci Rep http://www.kidney.de/pget.php?&tw=1&pmid=27125237 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=27125237 #FOAvip English Wikipedia <ref>{{Cite pmid|27125237}}</ref> Transformation seismology: composite soil lenses for steering surface elastic Rayleigh waves #MMPMID27125237 Colombi A; Guenneau S; Roux P; Craster RV Sci Rep 2016[]; 6 (ä): ä PMID27125237show ga Metamaterials are artificially structured media that exibit properties beyond those usually encountered in nature. Typically they are developed for electromagnetic waves at millimetric down to nanometric scales, or for acoustics, at centimeter scales. By applying ideas from transformation optics we can steer Rayleigh-surface waves that are solutions of the vector Navier equations of elastodynamics. As a paradigm of the conformal geophysics that we are creating, we design a square arrangement of Luneburg lenses to reroute Rayleigh waves around a building with the dual aim of protection and minimizing the effect on the wavefront (cloaking). To show that this is practically realisable we deliberately choose to use material parameters readily available and this metalens consists of a composite soil structured with buried pillars made of softer material. The regular lattice of inclusions is homogenized to give an effective material with a radially varying velocity profile and hence varying the refractive index of the lens. We develop the theory and then use full 3D numerical simulations to conclusively demonstrate, at frequencies of seismological relevance 3?10?Hz, and for low-speed sedimentary soil (vs: 300?500?m/s), that the vibration of a structure is reduced by up to 6?dB at its resonance frequency. äTransformation seismology: composite soil lenses for steering surface (epmc).pdf DeepDyve Pubget Overpricing