While current cloaking
technologies are able to fully conceal objects that are illuminated with a single colour of light, when faced with sunlight and most other light sources--which are broadband and therefore contain many colours--they become ineffective.
device was constructed from two pairs of commercially available components called an dispersive optical fiber and a temporal phase modulator placed in front of the filter and behind it.
The construction, operation, and characteristics of a 2D cylindrical cloaking
structure have been extensively studied in [2,10-12].
A similar approach is proposed in Iemma , where a correction based on a local Doppler factor is used to derive a simple correction for the metamaterial parameters, to obtain the acoustic cloaking
of objects impinged by the acoustic perturbation generated by a comoving source.
Using transformation optics as the design method, the first experimental demonstration of cloaking
was achieved at microwave frequencies .
[Research paper: arXiv:1409.4705 - "Paraxial Ray Optics Cloaking
From a practical point of view and with reverse thinking, the inverse design allows the possibility of integrating the technical advantages of forward strategies; e.g., (i) the central concept of invisibility is to minimize the total scattering cross section, (ii) anisotropic materials ensure invisibility without violating the uniqueness theorem of the inverse problem, and (iii) non-superluminal propagation provides cloaking
performance with a relatively broad bandwidth.
One is Optimal cloaking
algorithm and the other is random cloaking
algorithm Both need not have all the users reporting the information of their positions all the time; they just report the information of their positions to the centralized anonymizer when they move to a new grid-area.
In this paper, we analyze the existing location privacy protection systems and algorithms for location based services, considering their disadvantages of slow responding time and high anonymization costs; we propose a new enhanced greedy cloaking
algorithm which predicts a cloaking
area at the initial query to be the cloaking
region in the whole query lifetime by comprehensive control of privacy monitor, quality monitor, and dynamic adjuster.
DEVELOPMENT A lab researcher has improved the lab's cloaking
system, first announced in 2006, by cutting the reflections that tempered the illusion of invisibility
In order to increase the cloaking
performance and further reduce the complexity in physical realization, novel cloaks were designed by utilizing optimizations [19-22] to the multilayered anisotropic cloaks.
components of buildings with pressurized rubber would prevent the powerful waves produced by an earthquake or attack from "seeing" the structure.
It is based on "plasmonic cloaking
" which uses materials that can scatter light bouncing off objects.
, along with enhanced imaging and solar collection, are the three main areas of transformation optics supported through a multidisciplinary university research initiative managed by Dr.
device can virtually conceal what is placed under it.