Abstract:
Methods and systems for mitigating disturbances in a dual gridded reflector antenna are provided. An antenna system that includes a first reflective surface, a second reflective surface, and an intercostal ring is provided. The intercostal ring is configured to connect the first reflective surface and the second reflective surface. A baffle is disposed between the intercostal ring and a path of the electromagnetic waves. The baffle is configured to redirect the electromagnetic waves away from the intercostal ring. Alternatively, the baffle is not present, and the intercostal ring is configured to redirect a perturbed portion of an electromagnetic wave away from wave paths of electromagnetic waves reflected by the first reflective surface and the second reflective surface, respectively.
Abstract:
According to a first aspect of the present invention there is provided a process for preparing a particulate solid comprising the steps i) to iv): i) providing a dispersion of polymer particles in a liquid medium, said polymer being obtained or obtainable by the copolymerization of at least the monomers in components a) to d): a) 45 to 90 parts of one of more hydrocarbyl (meth) acrylates each having a homopolymer Tg of from 90 to 130° C. and having no hydrophilic groups; b) 10 to 55 parts of one or more ethylenically unsaturated monomers each having homopolymer Tg of below 90° C. and having no hydrophilic groups; c) 0 to 40 parts of one or more styrenic monomers having a homopolymer Tg of at least 90° C. and having no hydrophilic groups; d) 0 to 10 parts of one or more ethylenically unsaturated monomers each having at least one hydrophilic group; wherein all the parts are by weight; ii) associating the particles to form clusters of particles; iii) optionally stabilizing the clusters; iv) heating the clusters above the glass transition of the polymer.
Abstract:
According to a first aspect of the present invention there is provided a process for preparing a particulate solid comprising the steps i) to iv): i) providing a dispersion of polymer particles in a liquid medium, said polymer being obtained or obtainable by the copolymerisation of at least the monomers in components a) to d): a) 45 to 90 parts of one of more hydrocarbyl (meth) acrylates each having a homopolymer Tg of from 90 to 130° C. and having no hydrophilic groups; b) 10 to 55 parts of one or more ethylenically unsaturated monomers each having homopolymer Tg of below 90° C. and having no hydrophilic groups; c) 0 to 40 parts of one or more styrenic monomers having a homopolymer Tg of at least 90° C. and having no hydrophilic groups; d) 0 to 10 parts of one or more ethylenically unsaturated monomers each having at least one hydrophilic group; wherein all the parts are by weight; ii) associating the particles to form clusters of particles; iii) optionally stabilising the clusters; iv) heating the clusters above the glass transition of the polymer.
Abstract:
A method of manufacturing a composite element. A stack of plies is assembled on a lay-up table, each ply comprising a plurality of reinforcement elements such as dry-fibres. A first part of the stack of plies is bound to form a partially bound stack of plies, a second part of the stack of plies remaining unbound. The partially bound stack of plies is press-formed in a mould cavity between a pair of mould tools to form a shaped pre-form, plies in the second part of the stack sliding against each other during the press-forming. A liquid matrix material is injected into the shaped pre-form in the mould cavity and subsequently cured.
Abstract:
A beverage formulation having a beverage having caffeine wherein the beverage contains caffeine levels in the range of about 0.07 to about 0.30 mg/ml, being optically clear, and having an added aroma; and wherein the beverage comprises an extract that is derived from at least one member of the group of coffee cherry husks and coffee cherry pulp; wherein the extract is in the range of about 5 to about 30% based on standardized extract of the beverage; wherein at least a portion of the caffeine is derived from the extract; wherein the optically clear is measured by a haze value of at least below about 10; and wherein at least a portion of the added aroma is derived from aroma recovered from the extract.
Abstract:
The present invention relates to a transient control drive method, for driving a liquid crystal capacitor of a pixel circuit from a first voltage level to a second voltage level, comprises: driving the liquid crystal capacitor from the first voltage level to an intermediate voltage level; and driving the liquid crystal capacitor from the intermediate voltage level to the second voltage level. The present invention further provides a transient control drive circuit and an image display system thereof.
Abstract:
An active matrix liquid crystal display device has an array of picture elements (12), each comprising a picture element electrode (14) and a switching device (16), addressed by crossing sets of selection (row) and data (column) address conductors (18,20), and a set of supplementary connection lines (30) extending in the direction of the data address conductors (20) and connected to respective ones of the row address conductors (18) enabling addressing of the array from one side or opposed sides. Each picture element includes a storage capacitor (22) connected to its picture element electrode and a capacitor line (40) shared by picture elements in the same row. The selection conductor of one row of picture elements is coupled to a respective capacitor line associated with a different row, for example via a connection line (45) at their ends, whereby each connection line is connected to a respective selection conductor for the row of picture elements and the capacitor line for another row coupled thereto. In addition to enabling unwanted display artefacts caused by spurious parasitic capacitances to be avoided, the arrangement also allows capacitively coupled drive schemes to be employed with the necessary drive signals being supplied through the connection lines.
Abstract:
A magnetron output arrangement includes a coaxial output adapted to be coupled in an endfire configuration to a rectangular waveguide. The waveguide has a flange for mating with the magnetron output arrangement. The coaxial output includes a central conductor. The output arrangement further includes a plate located in a predetermined position with respect to the central conductor. The plane of the plate is arranged to be substantially perpendicular to the axis of the coaxial output. The plate is located a predetermined distance from the end of the central conductor, such that the coaxial output in use couples with the plate so that the output coupling is substantially the same regardless of the type of waveguide flange employed.
Abstract:
Magnetoresistive random access memory (MRAM) is used to provide in-pixel memory circuits for display devices. A memory circuit (25) comprises memory elements, for storing a drive setting, and a read-out circuit, for example a flip-flop circuit (64), for reading-out the stored drive setting. The memory elements comprise two MRAMs (60, 62), each coupled to a respective input of the flip-flop circuit (64). A drive circuit (26) is coupled to the read-out circuit and a pixel display electrode (27) for driving the pixel display electrode (27) dependent upon the read-out drive setting with drive current that does not pass through the MRAMs (60, 62). A display device (1) is provided comprising a plurality of pixels (20) each associated with one such memory circuit (25) and drive circuit (26).
Abstract:
A magnetron of the type having a strap ring has protruding regions of the strap ring arranged so as to increase the capacitance between the strap ring and another strap ring or between the strap ring and anode vanes. Increasing the capacitance at selected portions of the strap ring allows control of the frequency response of the magnetron.