Abstract: A security device, including at least first and second embossed, reflective metal diffraction gratings in respective regions: wherein the first diffraction grating exhibits, in incident white light, a zero-order output over a first area of substantially uniform grating period, wherein the zero-order output of the first diffraction grating comprises different coloured first and second sub-outputs for respective first and second polarisations parallel and perpendicular to the first diffraction grating; wherein the second diffraction grating exhibits, in incident white light, a zero-order output over a second area of substantially uniform grating period; wherein the zero-order output of the second diffraction grating comprises third and fourth sub-outputs for respective first and second polarisations parallel and perpendicular to the second diffraction grating; and wherein the first and second diffraction gratings exhibit, for incident white light, substantially the same first order diffraction efficiency over t

Abstract: A passive refrigeration box for controlled refrigeration of a product comprising: an outer box including an outer insulation layer; an inner box including an inner insulation layer, and a thermal shield on an outside of the inner insulation layer, the inner box and the outer box defining a vapour channel therebetween; and a thermal link including a thermal layer and a plurality of heat pipes or thermosyphons, the thermal layer and a top section of the inner box defining a coolant chamber, the coolant chamber including a coolant chamber access, and in communication with the vapour channel, and the thermal layer and a bottom section of the inner box defining a load chamber, the load chamber including a load chamber access, each heat pipe or thermosyphon having a condenser section disposed in the coolant chamber and an evaporator section disposed in the load chamber and extending through the thermal layer.

Abstract: A magnetocaloric heat pump with a regenerator assembly and a rotatable field generator, containing: a shaft, oriented along a rotation axis and inserted into an axial orifice of a regenerator body of the regenerator assembly and into an axial orifice of a generator body of the rotatable field generator, the rotatable field generator, wherein the generator body is peripherally situated in a periphery of the rotation axis, the generator body containing a first and a second magnetic ring section, which are located diametrically opposite to each other in relation to the rotation axis, wherein the rotatable field generator is attached to the shaft, and the regenerator assembly, wherein the regenerator body is peripherally situated in a periphery of a rotation axis, the regenerator body containing a magnetocaloric material distributed in the regenerator body and wherein the regenerator assembly is arranged around the shaft.

Abstract: Embodiments of a system and a method for continuously measuring cementitious board during the continuous manufacture thereof can be used in connection with the manufacture of various cementitious products, including gypsum wallboard, for example. Embodiments of a system and a method for continuously measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. A height measuring system can be used to determine the relative amount the cementitious board sags as it passes over an unsupported span disposed between the forming station and the cutting station and to correlate the measured sag distance with a value of percent hydration of the cementitious slurry of that particular portion of the cementitious board.

Abstract: A magnetocaloric cascade containing at least three different magnetocaloric materials with different Curie temperatures, which are arranged in succession by descending Curie temperature, wherein none of the different magnetocaloric materials with different Curie temperatures has a higher layer performance Lp than the magnetocaloric material with the highest Curie temperature and wherein at least one of the different magnetocaloric materials with different Curie temperatures has as lower layer performance Lp than the magnetocaloric material with the highest Curie temperature wherein Lp of a particular magnetocaloric material being calculated according to formula (I): Lp=m*dTad,max with dTad,max: maximum adiabatic temperature change which the particular magnetocaloric material undergoes when it is magnetized from a low magnetic field to high magnetic field during magnetocaloric cycling, m: mass of the particular magnetocaloric material contained in the magnetocaloric cascade.

Abstract: Embodiments of a system and a method for continuously measuring cementitious board during the continuous manufacture thereof can be used in connection with the manufacture of various cementitious products, including gypsum wallboard, for example. Embodiments of a system and a method for continuously measuring cementitious board during its continuous manufacture can be used online in a continuous manufacturing process to effectively determine the degree to which cementitious slurry has set (e.g., expressed as percent hydration) at a predetermined location, such as, near a cutting station, for example. A height measuring system can be used to determine the relative amount the cementitious board sags as it passes over an unsupported span disposed between the forming station and the cutting station and to correlate the measured sag distance with a value of percent hydration of the cementitious slurry of that particular portion of the cementitious board.

Abstract: A magnetocaloric cascade containing at least three different magnetocaloric materials with different Curie temperatures, which are arranged in succession by descending Curie temperature, wherein none of the different magnetocaloric materials with different Curie temperatures has a higher layer performance Lp than the magnetocaloric material with the highest Curie temperature and wherein at least one of the different magnetocaloric materials with different Curie temperatures has as lower layer performance Lp than the magnetocaloric material with the highest Curie temperature wherein Lp of a particular magnetocaloric material being calculated according to formula (I): Lp=m*dTad,max with dTad,max: maximum adiabatic temperature change which the particular magnetocaloric material undergoes when it is magnetized from a low magnetic field to high magnetic field during magnetocaloric cycling, m: mass of the particular magnetocaloric material contained in the magnetocaloric cascade.

Abstract: A magnetocaloric cascade containing at least three different magnetocaloric materials with different Curie temperatures, which are arranged in succession by descending Curie temperature, wherein none of the different magnetocaloric materials with different Curie temperatures has a higher layer performance Lp than the magnetocaloric material with the highest Curie temperature and wherein at least one of the different magnetocaloric materials with different Curie temperatures has as lower layer performance Lp than the magnetocaloric material with the highest Curie temperature wherein Lp of a particular magnetocaloric material being calculated according to formula (I): Lp=m*dTad,max with dTad,max: maximum adiabatic temperature change which the particular magnetocaloric material undergoes when it is magnetized from a low magnetic field to high magnetic field during magnetocaloric cycling, m: mass of the particular magnetocaloric material contained in the magnetocaloric cascade.

Abstract: An optically variable device includes a substrate and a plurality of optical elements formed in or on the substrate and being structured to provide a three-dimensional optical effect for a viewer when light is incident on the optical elements. The plurality of optical elements are arranged as a plurality of stereo pairs structured to reflect or refract light to corresponding focal points in three-dimensional space apart from the optically variable device to form the three-dimensional optical effect. The optical elements include one or more optical elements that are curved structures having a curvature that is either less than or greater than a semi-circle.

Abstract: A magnetocaloric cascade containing at least three different magnetocaloric materials with different Curie temperatures, which are arranged in succession by descending Curie temperature, wherein none of the different magnetocaloric materials with different Curie temperatures has a higher layer performance Lp than the magnetocaloric material with the highest Curie temperature and wherein at least one of the different magnetocaloric materials with different Curie temperatures has as lower layer performance Lp than the magnetocaloric material with the highest Curie temperature wherein Lp of a particular magnetocaloric material being calculated according to formula (I): Lp=m*dTad,max with dTad,max: maximum adiabatic temperature change which the particular magnetocaloric material undergoes when it is magnetized from a low magnetic field to high magnetic field during magnetocaloric cycling, m: mass of the particular magnetocaloric material contained in the magnetocaloric cascade.

Abstract: The technology provides a shimmed active magnetic regenerator (SAMR) for use in active magnetic thermodynamic devices. The shimmed active magnetic regenerator comprises a combination of at least one magnetocaloric material and at least one shim comprising at least one passive material, such that when a magnetic field is applied the relative magnetization of the magnetocaloric material in combination with the shim is greater than the relative magnetization of the magnetocaloric material. The SAMR can achieve a relative magnetism of about 1 from a magnetic field less than approximately 3T.

Abstract: Optical elements include an optical grating structure which exhibits novel pleochroic properties when rotated or viewed from changing observation locations. The optical grating structure is formed from a plurality of selectively arranged grating elements which are preferably, but not necessarily, formed from a plurality of lines or grooves having a closed-loop shape. The preferred closed-loop lines and grooves are disposed one inside another and preferably include at least one common axis of symmetry. A two-dimensional array of such elements is arranged to define an optically variable device. A method of creating elements, arrays and optically variable devices and articles employing the same are also disclosed.

Abstract: The present invention enables mobile users to access documents and/or corporate resources in their native application (i.e., Microsoft Word, Microsoft Excel, Microsoft PowerPoint, etc.) from a remote hosting environment irrespective of the applications resident on the user's computer (i.e., a personal computer, PDA, cellular telephone, etc.). In an aspect, a usermay access a hosting environment on the Internet, and synchronize data between the user's personal computer and the hosting environment, thereby permitting subsequent unlimited access to documents and/or corporate resources using a web browser from any location. Preferably, the synchronization of the data may occur manually or automatically.

Abstract: A substrate is arranged for presenting a three-dimensional optical image to a viewer. The substrate is formed with a multiplicity of pairs of spaced optical elements, with each pair of spaced optical elements being arranged for directing light incident thereon to a respective eye of the viewer, when the viewer is positioned at a predetermined angle of view or within a limited range of angles of view, for giving the viewer a perception of a point image located at a predetermined distance from a plane of the substrate at an intersection of lines followed by light rays from a respective optical element of a pair of spaced optical elements. The multiplicity of pairs of optical elements are arranged at different x and y orientations on the substrate, so that corresponding multiplicity of adjacent point images, so provided, together form the three-dimensional optical image for the viewer.

Abstract: A substrate is arranged to provide at least one optically variable image the substrate has a front surface formed with a plurality of groups of elemental areas, the different said groups of elemental areas corresponding to respective pixels of the image. The different elemental areas of each group are formed with respective sets of grooves or ridges, where the grooves and ridges of different elemental areas of each group are disposed at different orientations in the different elemental areas, such that each elemental area directs light to a viewer from a respective angle of view. For any given angle of view, the image seen by the viewer is made up of light reflected or refracted without interference.