Abstract: A method for calculating checksums includes calculating a first checksum based at least in part on a first block of data, and calculating a partial checksum based at least in part on a second block of data. The second block of data comprises a data portion followed by a fill portion, the fill portion having a length equal to a length of the first block of data. The first checksum and partial checksum are combined to form a second checksum for a total block of data, the total block of data comprising the first block of data and the data portion of the second block of data.

Abstract: A ceiling-mounted projection system has a projector mounted above the ceiling, and a periscope assembly that can be moved by a motor along a vertical axis between a raised position in which the periscope assembly is retracted into the ceiling and a lowered position in which the lower portion of the periscope assembly extends below the ceiling. An upper mirror is mounted on the upper portion of the periscope assembly and aligned to reflect images from the projector in a downward direction when the periscope assembly is in the lowered position. A lower mirror is mounted on the lower portion of the periscope assembly and aligned to reflect the images from the upper mirror onto a viewing surface when the periscope assembly is in the lowered position.

Abstract: Stable dry powders which are insoluble in hot water and which contain one or more lipid-soluble vitamins an/or one or more carotenoids are formed in an aqueous dispersion containing 2 to 50% by weight of at least one protein, 1 to 30% by weight of at least one sugar, 0.2 to 20% by weight of K2HPO4, Na2HPO4 or mixtures thereof, 0.1 to 20% by weight of at least one lipoid-soluble vitamin and/or at least one carotenoid and 5 to 95% of water. This dispersion is converted into dry powder which is heated in the range of 55° C. to 1800° C.

Abstract: The present invention provides an off-axis rotary joint for optical signal transfer. An annular waveguide has optical discontinuity means, such as a plurality of circumferentially equally spaced apart notches directed inwardly thereof, which discontinuities intercept a light beam emanating from a light source near the waveguide. The discontinuities direct light into the waveguide, along which it travels until it meets an internal reflecting member which, in turn reflects the travelling light out of the waveguide to a suitable detector. The light source and the waveguide/reflector/detector are relatively rotatable so that the signal strength at the detector is an indication of the position of the light source relative to the waveguide. The invention has practical applicability in apparatus, such as turrets and CT scanners, in which the central shaft or axis area must be occupied by equipment or personnel rather than componentry of the rotary joint.

Abstract: The purpose of this invention is to reveal the surface properties, such as smoothness and resulting printability of a rapidly moving strip of material, such as paper. To accomplish this, the production process is continuously monitored, without error due to environmental conditions such as dust and dirt on optical surfaces, temperature affects, lamp degradation, etc. An index of printability relative to smoothness is obtained by integrating the plateau areas in the optical field of view. A unique combination of approach angle, selected wave length of infra red radiation, horizontal polarization of search beam, and use of four optical paths to obtain mathematical model equivalency, is employed.