Abstract: System and method for the indexing and retrieval of semantically annotated information units from a collection of semantically annotated indexed information units in response to a query using an ontology-based IR model. The retrieval method comprises: receiving a semantically annotated query with semantic annotations to individuals or classes within a determined populated base ontology; embedding, as a set of weighted-mentions to individuals or classes within the populated base ontology, the semantically annotated query in a semantic representation space of an ontology-based metric space IR model; obtaining the representation in the semantic representation space for every indexed information unit; computing the Hausdorff distance between the space representation of the query and the space representation of all the indexed information units of the collection; retrieving and ranking, the relevant information units based on the computed Hausdorff distance.

Abstract: Guidance System for controlling output variables of single-input single-output or multi-input multi-output processes, where the process parameters are known or unknown and time-varying. The guidance system of the present invention generates a desired trajectory for a process output variable, and based on said desired trajectory, computes a set point for the derivative variable of said process output variable. This set point is then applied to a model based advanced controller for said derivative variable and the control action generated by said model based advanced controller is applied to the process and guides the process evolution in such a way that said process output variable converges towards said desired trajectory.

Abstract: A device for concentrating solar radiation (4) with longitudinal mirrors (7) and a longitudinal receiver (1), has mirrors with a circular cross-section with a radius of curvature that is twice the transverse distance from the center (35) of each mirror to the central point (3) of the receiver. The width of the receiver is 1% of the transverse distance from the central point to the center (89) of the furthest mirror (32). The width of each mirror is determined according to the drift of the rays reflected when the mirror focuses the sun, prescribing an equal width for all mirrors, which is: equal to the width of the active face (2) of the receiver when mounted according to the meridian; and triple the width of the active face (2) of the receiver when mounted according to the parallel of latitude. The mirrors are installed in a contiguous manner and the receiver is installed at a height on columns (8).

Abstract: Guidance System for controlling output variables of single-input single-output or multi-input multi-output processes, where the process parameters are known or unknown and time-varying. The guidance system of the present invention generates a desired trajectory for a process output variable, and based on said desired trajectory, computes a set point for the derivative variable of said process output variable. This set point is then applied to a model based advanced controller for said derivative variable and the control action generated by said model based advanced controller is applied to the process and guides the process evolution in such a way that said process output variable converges towards said desired trajectory.

Abstract: A receiver for a solar power plant with mirrors (7) and horizontal longitudinal receivers (1) includes a rotating shaft and axis of symmetry which (14) are parallel to a longitudinal axis of the radiation receiver. The receiver is formed by a balanced expansion and pressure collector, the tubes (19) of which are grouped in a separate central bundle (20) and adjacent bundles (21 and 22), thermally insulated from one another longitudinally. Heat transfer fluid circulates first through both adjacent bundles in parallel, to then be injected into the central bundle, where the radiation intensity received is greater because of receiving the radiation from the array of mirrors focused on the midline of the active face (2) of the receiver, each bundle of tubes being able to be covered by a separate (60, 61, 62) transparent window (28).

Abstract: A device for concentrating solar radiation (4) with longitudinal mirrors (7) and a longitudinal receiver (1), has mirrors with a circular cross-section with a radius of curvature that is twice the transverse distance from the centre (35) of each mirror to the central point (3) of the receiver. The width of the receiver is 1% of the transverse distance from the central point to the centre (89) of the furthest mirror (32). The width of each mirror is determined according to the drift of the rays reflected when the mirror focuses the sun, prescribing an equal width for all mirrors, which is: equal to the width of the active face (2) of the receiver when mounted according to the meridian; and triple the width of the active face (2) of the receiver when mounted according to the parallel of latitude. The mirrors are installed in a contiguous manner and the receiver is installed at a height on columns (8).

Abstract: The present invention refers to the use of a selection of imidazole compounds in a method of obtaining extracellular or intracellular pH images in biological systems, by magnetic resonance, consisting of administering the imidazole compound to said biological system and acquiring a pH image through magnetic resonance measurements, and said method selected from the group consisting of proton magnetic resonance chemical shift imaging (1H CSI), proton magnetic resonance spectroscopic imaging (1H MRSI), fluorine magnetic resonance chemical shift imaging (19F CSI), fluorine magnetic resonance spectroscopic imaging (19F MRSI), and combinations thereof.

Abstract: Hydrogels presented in the form of pellets which are capable of regulating, without dissolving, any pH of an aqueous solution so as to convert it to a pH of 7. These pellets can be removed from the solution at any time without this modifying the pH, and once washed, can be used again. The velocity of buffering depends on the initial pH and can be controlled by modifying the mass and the composition of the pellets. They are obtained by copolymerization of a vinyl-heterocyclic comonomer and a divinyl comonomer in an aqueous solution at a temperature of close to 60.degree. C., in an inert atmosphere. By adjusting the proportion of crosslinking agent and the concentrations of comonomers, the crosslinking of the hydrogel is regulated in accordance with the intended use of the product.

Abstract: A triboelectric device in which electrical charges are obtained by a rolling process between two rigid dielectric surfaces of appropriate materials, one of which may be planar. There exists therein no injection of electrical charges originating from outside. The separation of the charges with the concomitant generation of electrical potentials is effected by the movement of the parts by triboelectrification. Such devices are useful in the construction of electrostatic generators for teaching, research or industry and as an essential supply for fixed or portable ignition devices for boilers, cookers and gas burners.