1,592 research outputs found
Polarization optics of GRIN lenses
No full text"In this paper we show that the matrix representation for a linear retarder, given by Jones calculus, can be successfully applied to describe the birefringence properties of GRIN lenses for meridional rays. The usefulness of this description is experimentally verified by comparing the output pattern of a GRIN lens obtained in a linear polariscope with the predicted conoscopic pattern.
The work of Aleksandr Grin (1880-1932) : a study of Grin's philosophical outlook
No full textThere has been to date no attempt at a detailed examination of Aleksandr Grin’s
philosophical views interpreted on the basis of his literary work. Whilst some critics have
noted interesting links between the writer’s oeuvre and a few popular philosophers, this has
usually been done in passing and on an ad hoc basis. This thesis aims to fill this gap by
reconstructing Grin’s views in relation to the European philosophical tradition.
The main body of the thesis consists of three parts built on and named after three
essential themes in philosophy: External World, Happiness and Morality.
Part One delineates Grin’s views on nature and civilisation: I argue first that his cult of
nature makes it possible to conceive of Grin as a pantheistic thinker close to Rousseau and
Bergson, and then I reconstruct the author’s criticism of urbanisation and industrialisation.
In the second part I assess the place of happiness in Grin’s world-view, indicating its
similarities to the philosophy of various thinkers from the Ancients to Schopenhauer and
Nietzsche. After sketching a general picture of the concept of happiness in Grin’s works, I
discuss the place of material and immaterial factors in the writer’s outlook. I also gather
maxims expressed by the protagonists in his fiction that can be taken as recommendations
concerning ways of achieving and defending happiness. Finally, I link happiness with the
problem of morality in Grin’s oeuvre.
In the final part I examine modes of moral behaviour as displayed by the author’s
protagonists. Firstly, I argue that in Grin’s works we find numerous examples and themes that
allow us to perceive him as an existentialist. Secondly, I indicate Grin’s adherence to rules of
conduct commonly associated with chivalric literature. Thirdly, I emphasise the importance of
Promethean-like characters in the moral hierarchy of Grin’s protagonists
Metamaterial-Based Planar GRIN Lens Antenna for D-Band Wireless Communications
No full textThis paper presents a metamaterial-based planar GRIN lens antenna for wireless communications, modeled and designed using COMSOL Multiphysics. The antenna is designed to work at 140 GHz in the D-band, proposed for the next mobile generation (6G). Such devices could be produced by using the SiGe technology, that allows large scale production. The proposed device shows a 11 dB gain in the center band. This value is about five times higher than the same antenna without the lens
D. Parodi, La Philosophie contemporaine en France. Essai de classification des doctrines, 1920
No full textGrin Edmond. D. Parodi, La Philosophie contemporaine en France. Essai de classification des doctrines, 1920. In: Revue d'histoire et de philosophie religieuses, 3e année n°3, Mai-juin 1923. pp. 289-292
Design of GRIN Liquid Crystal Lens for Autostereoscopic 2-D/3-D Switchable Display
No full textWe achieves switchable between autostereoscopic 2-view 3-D and 2-D display on a 10.1-inch LCD panel using GRIN LC lens with a 20 um cell gap and 14 volt driving voltage. Simulation results such as refraction distribution and 3-D crosstalk verify the performance of this LC lens for autostereoscopic 2-D/3-D switchable display.</jats:p
grin
No full textgrin259. grin: A strap that's put on the horse's top lip and is used to turn his lip up while shoeing.W. J. KIRWINJH 4/73Used I and SupUsed I and Sup1Not usedThis card is stamped with DNE-cit bit it isn't cited in the DNE
grin
No full textgrin259. a device used by blacksmiths to keep horses quiet while shoeing them. A grin consist [sic] of a stick and a loop of rope attached to one end. The loop is palced over the horse's nose and then the stick is twisted, cutting off the horse's breathing.W. J. KIRWIN MAR 1973JH MAR 1973DNE-citUsed I and SupUsed I and Sup1Not usedThis card is stamped with DNE-cit bit it isn't cited in the DNE
Current taxonomic composition of European genebank material documented in EURISCO
No full textTaxonomy plays an essential role in genebank documentation. It is often the first level at which users search material, and it determines the protocols used in the management of collections. Especially, when plant genetic resources information is pooled in systems such as EURISCO, the European catalogue of ex situ plant genetic resources, problems regarding technical handling of taxonomic nomenclature, such as lack of standardization and low quality of data, become apparent. These problems were studied by analysing the content of EURISCO and mapping the taxon names in EURISCO on those used in the United States Department of Agriculture genebank system GRIN-Tax. Thus, the number of spelling errors and the level of standardization could be quantified and improved. An analysis of the content of EURISCO was made, showing a highly unbalanced distribution over crops: 50% of the accessions belong to ten genera only. Mapping EURISCO on the crops listed in Annex 1 of the International Treaty on Plant Genetic Resources for Food and Agriculture showed that 67% of the accessions in EURISCO belong to crops in that list
Visualization D 3D GRIN Lenslet with baffles.wmv
No full textVideo showing holographic display testbed configured with a 3D GRIN (axial and radial polynomial functions) microlens array including inter-lenslet baffling to reduce cross talk when integrated with LED display. Showing extended field of view made possible with baffling
A 2-D Multi-Beam GRIN Lens Using Multilayer Metasurfaces
No full textA new design method of gradient-index (GRIN) lenses is presented to obtain wide multi-beam coverage and high aperture efficiency. Multilayer metasurfaces using effective medium concept are deployed for the lens implementations. The radiation performance of the GRIN lens has been validated based on microstrip array illuminations. The design theory has been well verified with both simulation and measurement
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