نتایج جستجو برای: refraction
تعداد نتایج: 8286 فیلتر نتایج به سال:
Negative refraction of elastic waves at the deep-subwavelength scale in a single-phase metamaterial.
Negative refraction of elastic waves has been studied and experimentally demonstrated in three- and two-dimensional phononic crystals, but Bragg scattering is impractical for low-frequency wave control because of the need to scale the structures to manageable sizes. Here we present an elastic metamaterial with chiral microstructure made of a single-phase solid material that aims to achieve subw...
Refraction of wave propagation in a corotating pulsar magnetospheric plasma is considered as a possible interpretation for observed asymmetric pulse profiles with multiple components. The pulsar radio emission produced inside the magnetosphere propagates outward through the rotating magnetosphere, subject to refraction by the intervening plasma that is spatially inhomogeneous. Both effects of a...
We report initial results from the world’s first ISP-scale field trial of a refraction networking system. Refraction networking is a next-generation censorship circumvention approach that locates proxy functionality in the middle of the network, at participating ISPs or other network operators. We built a high-performance implementation of the TapDance refraction networking scheme and deployed ...
REFRACTING THE REFRACTION: ANDRZEJ BUSZA’S TRANSLATION THEORY AND CANON OF CONTEMPORARY STUDIES The article discusses the less-known theory of translation put forward by Andrzej Busza – a Polish-Canadian writer and translator, professor University British Columbia co-founder “Kontynenty” group in London. Busza, also esteemed as poet scholar studying writings Joseph Conrad, presented his views o...
A Fresnel zone plate lens can be constructed using a dye-doped liquid crystal filled cell and photo-induced alignment techniques. Light passing through a Fresnel zone patterned photo-mask causes the dye-doped liquid crystal to align in such a way to produce odd and even zones on the lens. Diffraction of incident light through the odd and even zones of the lens allows the light to constructively...
BACKGROUND To evaluate the predictability of refraction following immediate sequential bilateral cataract surgery (ISBCS) performed under general anaesthesia. METHODS This is a retrospective review of all ISBCS performed at Kantonsspital Winterthur, Switzerland, between April 2000 and September 2013. The case notes of 250 patients were reviewed. Patients having full refraction reported (110 p...
Galileo Galilei, the father of experimental science, taught that to understand nature, you must measure nature. Galileo’s contemporary, Christophoro Scheiner, explored the nature of eyes as optical instruments and discovered how to measure the eye’s focusing distance simply by viewing a point of light through closely spaced pinholes in an opaque card. Two centuries later, Thomas Young used Sche...
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