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"Rainbows"
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I see rainbows
\"Young children are naturally curious about the world around them. I See Rainbows offers answers to their most compelling questions about rainbows. Age-appropriate explanations and appealing photos encourage readers to continue their quest for knowledge. Additional text features and search tools, including a glossary and an index, help students locate information and learn new words.\"--Provided by publisher.
Book
Rainbow Connections of Graphs: A Survey
The concept of rainbow connection was introduced by Chartrand et al. [
14
] in 2008. It is interesting and recently quite a lot papers have been published about it. In this survey we attempt to bring together most of the results and papers that dealt with it. We begin with an introduction, and then try to organize the work into five categories, including (strong) rainbow connection number, rainbow
k
-connectivity,
k
-rainbow index, rainbow vertex-connection number, algorithms and computational complexity. This survey also contains some conjectures, open problems and questions.
Journal Article
Rainbow
\"What is that colorful arc in the sky? It is a rainbow. Rainbows are always pretty to look at, but where do they come from? The answer is at your fingertips. Just open this book and read about the wonders of rainbows...\"-- Provided by publisher.
Book
Weaving the rainbow: Properties of classical light
This paper considers the principal themes of classical optics which principally emerged in the seventeenth century. These themes - rays, mechanical effects, waves, colour and polarisation - are woven together especially in the explanation of the rainbow. They are also entwined with optical technology and the physiology of human vision. 1
Journal Article
Graded elastic metasurface for enhanced energy harvesting
In elastic wave systems, combining the powerful concepts of resonance and spatial grading within structured surface arrays enable resonant metasurfaces to exhibit broadband wave trapping, mode conversion from surface (Rayleigh) waves to bulk (shear) waves, and spatial frequency selection. Devices built around these concepts allow for precise control of surface waves, often with structures that are subwavelength, and utilise Rainbow trapping that separates the signal spatially by frequency. Rainbow trapping yields large amplifications of displacement at the resonator positions where each frequency component accumulates. We investigate whether this amplification, and the associated control, can be used to create energy harvesting devices; the potential advantages and disadvantages of using graded resonant devices as energy harvesters is considered. We concentrate upon elastic plate models for which the A0 mode dominates, and take advantage of the large displacement amplitudes in graded resonant arrays of rods, to design innovative metasurfaces that trap waves for enhanced piezoelectric energy harvesting. Numerical simulation allows us to identify the advantages of such graded metasurface devices and quantify its efficiency, we also develop accurate models of the phenomena and extend our analysis to that of an elastic half-space and Rayleigh surface waves.
Journal Article
Encyclopedia of rainbows : our world organized by color
In this playful visual encyclopedia, artist Julie Ream groups together colorful iterations of a single type of thing and meticulously arranges them in rainbow order.-- Provided by publisher.
Book
A second wave of topological phenomena in photonics and acoustics
Light and sound are the most ubiquitous forms of waves, associated with a variety of phenomena and physical effects such as rainbows and echoes. Light and sound, both categorized as classical waves, have lately been brought into unexpected connections with exotic topological phases of matter. We are currently witnessing the onset of a second wave of active research into this topic. The past decade has been marked by fundamental advances comprising two-dimensional quantum Hall insulators and quantum spin and valley Hall insulators, whose topological properties are characterized using linear band topology. Here, going beyond these conventional topological systems, we focus on the latest frontiers, including non-Hermitian, nonlinear and non-Abelian topology as well as topological defects, for which the characterization of the topological features goes beyond the standard band-topology language. In addition to an overview of the current state of the art, we also survey future research directions for valuable applications.
The current state of the art of topological phenomena in photonics and acoustics is reviewed and future research directions for valuable applications are discussed.
Journal Article