By Richard V. Craster, Sébastien Guenneau
About the publication: This publication is the 1st finished assessment on acoustic metamaterials; novel fabrics which may control sound waves in striking methods, which come with collimation, focusing, cloaking, sonic screening and remarkable transmission. It covers either experimental and theoretical elements of acoustic and elastic waves propagating in based composites, with a spotlight on powerful homes linked to destructive refraction, lensing and cloaking. so much comparable books within the box handle electromagnetic metamaterials and concentrate on numerical tools, and little (or no) experimental part. every one bankruptcy can be authored by way of an said specialist, among the subjects coated might be experimental effects on non-destructive imaging, cloaking through floor water waves, flexural waves in skinny plates. functions in clinical ultrasound imaging and modeling of metamaterials could be emphasised too. The e-book can function a reference for researchers who desire to construct an effective origin of wave propagation during this category of novel materials.
Read or Download Acoustic Metamaterials: Negative Refraction, Imaging, Lensing and Cloaking PDF
Similar imaging systems books
Advances in electronic sign processing algorithms and desktop expertise have mixed to supply real-time platforms with features a long way past these of simply few years in the past. Nonlinear, adaptive tools for sign processing have emerged to supply larger array achieve functionality, despite the fact that, they lack the robustness of traditional algorithms.
Regardless of being a tender box of analysis and improvement, information mining has proved to be a winning method of extracting wisdom from large collections of based electronic facts assortment as frequently kept in databases. while info mining was once performed in early days totally on numerical information, these days multimedia and net purposes force the necessity to improve info mining equipment and strategies which may paintings on all types of knowledge corresponding to files, photographs, and signs.
Concerning the e-book: This publication is the 1st entire overview on acoustic metamaterials; novel fabrics that may control sound waves in remarkable methods, which come with collimation, focusing, cloaking, sonic screening and notable transmission. It covers either experimental and theoretical features of acoustic and elastic waves propagating in established composites, with a spotlight on powerful houses linked to detrimental refraction, lensing and cloaking.
This entire quantity covers radiopharmaceuticals built for pathway-directed structures in imaging and theranostic functions. We now are on the leading edge of delivering customized therapy with elevated use in oncology of those new radiopharmaceuticals. traits in high-resolution instrumentation improvement, caliber insurance structures and regulatory compliance for radiopharmaceuticals, medical evaluate of radiopharmaceuticals, and advantages and pitfalls of the present scientific FDG puppy are mentioned.
Additional resources for Acoustic Metamaterials: Negative Refraction, Imaging, Lensing and Cloaking
Fig. 17. At this frequency, we observe a lensing effect for a finite array of high-contrast cylinders, see Figs. 20. We note that the stop bands correspond to Mie resonances of the cylinders, see Fig. 18. However, if the contrast is not large enough, the stop bands cannot form as the contrast in shear modulus is only on the order of 10, and the whole theory breaks down, see Fig. 16. Similar results hold for 30 S. V. Craster Fig. 01. 647] whereby the group velocity is negative on the optical band of the low frequency stop band in Fig.
2 Model and Method of Calculation As illustrated in Fig. 1, we consider square, triangular and honeycomb lattice arrays of cylindrical pillars on the surface of a semi-infinite substrate. The z axis is chosen to be perpendicular to the surface and parallel to the cylinder axis.
Opt. Lett. 30, 1204–1206 (2005) 19. : Acoustic meta-materials for sound focussing and confinement. New J. Phys. 9, 399 (2007) 20. : Oblique propagation of electromagnetic and elastic waves for an array of cylindrical fibres. Proc. R. Soc. Lond. A 459, 2215–2263 (2003) 21. : Negative refractive index, perfect lenses and checkerboards: Trapping and imaging effects in folded optical spaces. C. R. Phys. 10, 352–378 (2009) 22. : Negative refraction in 2d checkerboards related by mirror anti-symmetry and 3d corner lenses.