منابع مشابه
Revealing Invisible Photonic Inscriptions: Images from Strain
Photonic structural materials have received intensive interest and have been strongly developed over the past few years for image displays, sensing, and anticounterfeit materials. Their "smartness" arises from their color responsivity to changes of environment, strain, or external fields. Here, we introduce a novel invisible photonic system that reveals encrypted images or characters by simply ...
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متن کاملMetrical Quantization *
Canonical quantization may be approached from several different starting points. The usual approaches involve promotion of c-numbers to q-numbers, or path integral constructs, each of which generally succeeds only in Cartesian coordinates. All quantization schemes that lead to Hilbert space vectors and Weyl operators—even those that eschew Cartesian coordinates—implicitly contain a metric on a ...
متن کاملHidden Inscriptions in the Laurentian Library
Following the discovery of a series of geometric designs on the floor of the Biblioteca Laurenziana in Florence we analyse the “Medici panel”, which consists of a circular rosette containing a set of inscribed elliptical disks, with a view to regenerating the pattern. The geometry is shown to be surprisingly complex. We were able to determine a numerical solution for synthesising the pattern. A...
متن کاملContextual Metrical Invisibility
This paper investigates a stress phenomenon which I refer to as “contextual metrical invisibility” in several languages, the primary examples being from Mohawk and Passamaquoddy. In each of these languages, there is a class of vowels which are, in certain contexts but not in others, invisible to syllable-sensitive processes. The proposal I make is that such vowels, which I refer to as “weak vow...
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ژورنال
عنوان ژورنال: The Classical Review
سال: 1897
ISSN: 0009-840X,1464-3561
DOI: 10.1017/s0009840x00026056