Abstract: In embodiments of the invention, a semiconductor structure comprising a III-nitride light emitting layer disposed between an n-type region and a p-type region is grown on a substrate. The substrate is a non-III-nitride material. The substrate has an in-plane lattice constant asubstrate. At least one III-nitride layer in the semiconductor structure has a bulk lattice constant alayer and [(|asubstrate?alayer|)/asubstrate]100% is no more than 1%. A surface of the substrate opposite the surface on which the semiconductor structure is grown is textured.

Abstract: An antenna with polarization switching comprising a plurality of waveguides fed with radiofrequency signals and perforated with apertures disposed so as to illuminate radiating elements placed on mobile support means in a plane that is distant from the said apertures, it being possible for the said support means to be configured according to at least two distinct configurations. The radiating elements illuminated according to one and the same configuration are adjacent, the support means being adapted for orienting the radiating elements illuminated in a first configuration according to a different direction from the radiating elements illuminated in a second configuration. The antenna applies notably to the switching of antennas onboard objects moving on the ground required to undertake high-speed communications with a satellite, in particular a geostationary satellite.

Abstract: Methods, systems, and apparatus, including computer programs encoded on a computer storage medium, for information retrieval. In one aspect, a method includes receiving a search query in a search interface; determining that the received search query is a flights-related query; and in response to determining that the search query is a flights-related query and without further user input, providing a flight search interface including a plurality of search dimensions and a plurality of flight search results, each dimension associated with an attribute of flight search and each dimension having an associated value, wherein one or more dimension values correspond to values extracted from the search query, and wherein the plurality of flight search results are filtered according to the dimension values.

Abstract: An antenna with polarization switching comprises a support comprising at least two faces each supporting a plurality of waveguides fed with radiofrequency signals and pierced with apertures disposed so as to illuminate radiating elements placed some distance from the said apertures. For at least one given antenna pointing, the said support is able to toggle between at least two different configurations, the said support being configured so as to place, in the second configuration, the second face in a position identical to that taken by the first face in the first configuration, several radiating elements of the first face being, in the said position, oriented differently from radiating elements of the second face. It applies notably to the switching of antennas embedded onboard moving objects on the ground having to operate high-speed communications with a satellite, in particular a geostationary satellite.

Abstract: A printing device having ultrafine particle (UFP) emissions is disclosed which includes an UFP particle removal assembly comprising a fluid conduit having a printing device emission input and output and an other fluid input and output wherein an emission portion of the conduit is affected by the other fluid portion and communication of the other fluid through the removal assembly effects a condensation/coalescence of the UFP emissions between the emission input and output for a reduction in UFP content of printing device emissions at the printing device emission output.

Abstract: A light emitting device comprises a flip-chip light emitting diode (LED) die mounted on a submount. The top surface of the submount has a reflective layer. Over the LED die is molded a hemispherical first transparent layer. A low index of refraction layer is then provided over the first transparent layer to provide TIR of phosphor light. A hemispherical phosphor layer is then provided over the low index layer. A lens is then molded over the phosphor layer. The reflection achieved by the reflective submount layer, combined with the TIR at the interface of the high index phosphor layer and the underlying low index layer, greatly improves the efficiency of the lamp. Other material may be used. The low index layer may be an air gap or a molded layer. Instead of a low index layer, a distributed Bragg reflector may be sputtered over the first transparent layer.

Abstract: Multifrequency reflecting antenna (AR), for example for a telecommunication satellite that comprises a reflector (R) with a front face (FA) for reflecting beams of electromagnetic waves belonging to at least two different frequency bands. The front face (FA) of the reflector (R) comprises a structure (ST) defining a three-dimensional pattern with symmetry of revolution, chosen so as to shape the beams such that they have approximately identical radiofrequency characteristics.

Abstract: Multifrequency reflecting antenna (AR), for example for a telecommunication satellite that comprises a reflector (R) with a front face (FA) for reflecting beams of electromagnetic waves belonging to at least two different frequency bands. The front face (FA) of the reflector (R) comprises a structure (ST) defining a three-dimensional pattern with symmetry of revolution, chosen so as to shape the beams such that they have approximately identical radiofrequency characteristics.

Abstract: Dual polarisation antenna having low side lobes, useful in a satellite radio communication system. The antenna includes a reflector assembly (12) illuminated by a feed source (11). The reflector assembly (12) includes a front reflector (15) that reflects two electromagnetic waves orthogonally polarized and each at a different frequency, an auxiliary reflector (16) that reflects one of the orthogonally polarized electromagnetic waves, and a deflecting surface (13) that totally diffracts the orthogonally polarized electromagnetic wave that passes through the auxiliary reflector (16).

Abstract: Dual polarisation antenna having low side lobes, useful in a satellite radiocommunication system.

Abstract: The present invention concern a method using powder metallurgy for producing molded parts intended to be assembled by self-brazing to metal parts capable of receiving them and said receiving parts. The method comprises forming a homogenous mixture of a basic metal powder, brazing powder and a liquid binding agent which is injection molded to form a self-brazing part.

Abstract: The process relates to the production of a green from slurry by solidification after injection into a mold having a temperature of less than 0.degree. C. The mold and moveable parts of a jack ensure closure thereof and are housed within a gas-tight vessel. A distributor for dry gas with a dew point lower than the temperature of the mold emits a gas current through apertures. The green is conducted outside the vessel through an aperture which is opened in a continuous or discontinuous manner. The process is applicable to the production of sintered metallic or ceramic parts with high density and high performance mechanical characteristics.

Abstract: A device for the production of a green from slurry by solidification after injection into a mold having a temperature of less than 0.degree. C. The device includes a mold having a jack wherein moveable parts of the jack ensure closure thereof and which are housed within a gas-tight vessel. A distributor for dry gas with a dew point lower then the temperature of the mold emits a gas current into the vessel through apertures. A chute conducts the green towards an exit aperture and to a receiving member outside the vessel.

Abstract: A radiating device for a planar antenna, said device including a first ground plane and a second ground plane, a slot (25) provided in the first ground plane and being fed by electromagnetic coupling from a feed line (17), and an assembly of a plurality of thin conductive parts; the central portion of the radiating slot (25) being a conductive part (15) supported at its center by a supporting column (18). Application in particular to the space field.

Abstract: The anti-seizing coating according to the invention relates to the protection of the surfaces of male (7) or female (2) components of an assembly means (1) for metal tubes by threadings coming into contact with one another at the time of screwing.This coating is constituted by a thin lead oxide layer (14) produced by the oxidation of a lead layer, which is itself formed on an underlying layer (13) of a metal such as copper and which has been directly or indirectly deposited beforehand on the surface (4, 5, 9, 10, 11, 6) to be protected against seizing. The invention also relates to the process for producing this coating and the coated assembly means obtained.