Abstract: Autonomous oxy-gas cutting of a metal substrate or surface along a cutting path employs vision feedback from camera based images of a predetermined, marked cutting path. The method for metal cutting according to the predetermined path includes identifying the path on a substrate for cutting, and computing a set of points based on iterative intervals along the path. A controller disposes a cutting torch based on a tangent to the path at each point in the set of points. The controller iteratively advances the torch based on successive points in the set of points for a complete traversal of the path. Cutting torch control involves moving an oxy-gas cutting jet along the cutting path on a metal surface for an efficient and complete cut. While traversing the cutting path, the controller regulates the surface heat pool quality by moving the torch tip at an appropriate velocity.

Abstract: A dual-luminophor compositions that include a first luminescent compound having a luminescent emission that is sensitive to oxygen concentration, a second luminescent compound having a luminescent emission that is insensitive to oxygen concentration, and an oxygen-permeable host material; and method for measuring the pressure of an oxygen-containing fluid using the dual-luminophor composition.

Abstract: Paper pulp is added to a stain solution. The stain solution and pulp fibers are mixed to form a slurry. Samples are removed from the slurry and are admixed with dilution water and a bleach. Then, the fibers are moved into a flow cell where they are subjected to a light source adapted to stimulate fluorescence from the stained pulp fiber. Before the fiber slurry enters the flow cell it is mixed with a dilution water of bleach to reduce background fluorescence. The fluorescent light is collimated and directed through a dichroic filter onto a fluorescence splitting dichroic filter.