نتایج جستجو برای: left handed materials

تعداد نتایج: 726760  

ژورنال: Anatomical Sciences Journal 2003
Haghir, Hassan, Mehr Aein, Parviz,

Purpose: This study is designed to determine the sex difference in volume of precentral cortex of left hemisphere in right-handed normal subjects and the right-handed subjects which are suffering from Alzheimer and Parkinson diseases. Materials and Methods: This study was performed on 72 normal human brains (38 males, 34 females), 11 human brains suffering from Alzheimer (4 males, 7 females), ...

2017
Davit Hakobyan Etienne Brasselet

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

Journal: :Optics express 2003
Chiyan Luo Steven Johnson J Joannopoulos J Pendry

It is shown that certain metallic photonic crystals can enable negative refraction and subwavelength imaging without relying on a negative effective index. These metallic structures are very simple in design and appear straightforward for fabrication. Their unusual electromagnetic response should provide an interesting comparison with the metallic left-handed materials.

Journal: :Optics letters 2006
Alexander K Popov Vladimir M Shalaev

Optical parametric amplification controlled by the auxiliary electromagnetic field enables transparency, amplification, and oscillation with no cavity in strongly absorbing negative-index metamaterials. The opposite directions of the wave vector and the Poynting vector in such materials result in extraordinary optical properties, including "backward" phase matching and the generation of entangl...

2001
V. V. Klimov

The influence of a microsphere having simultaneously negative permittivity and permeability (Left-Handed Sphere) on decay rate of allowed (E 1) and forbidden (M 1) transitions is considered. It is found, that in contrast to usual (Right-Handed) materials it is possible to increase the decay rate by several orders of magnitude even in the case of sphere of small radii. This enhancement is due to...

Journal: :NeuroImage 2006
Pierre-Yves Hervé Fabrice Crivello Guy Perchey Bernard Mazoyer Nathalie Tzourio-Mazoyer

Using voxel-based morphometry, we measured the cerebral anatomical asymmetries in a sample of 56 young right-handed males and then compared voxelwise asymmetry indices of these subjects to those of 56 young left-handed males. In the right-handed, the clusters of grey matter asymmetry corresponding to the leftward occipital petalia and planum temporale asymmetries were retrieved. Strong rightwar...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2002
Makoto Tadokoro Hideaki Kanno Tadanori Kitajima Hiromi Shimada-Umemoto Noritaka Nakanishi Kiyoshi Isobe Kazuhiro Nakasuji

Manipulation of molecular crystals formed from self-organization is one of the important methods to develop the new molecular functional materials. In particular, we look upon mutual cohesive interactions of hydrogen bonding and metal coordination as one useful tool to construct the preprogramming superstructures. In this study, five controlled superstructures of a one-dimensional linear chain-...

2012
Jérôme Crassous Axelle Amon Jeanne Crassous

Differential scattering of leftand right-handed circularly polarized waves is a general property of scattering media lacking space-inversion symmetry. We show in this paper that this scattering difference has remarkable properties in the case of an almost transparent chiral random medium. By tuning the refractive indices of the materials composing the medium, this scattering difference can be v...

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