Abstract: A method for traveling down a prescribed arrangement of paths which are connected to one another at nodes with a mobile robot. The robot changes from an initial route, which contains all as yet untraveled paths, to a different replacement route including a loop route which retakes at least one path and at least one further path, and a subsequent remaining route which contains all as yet untraveled paths at that time if a value of a quality function for the replacement route is lower than a value of this quality function for the initial route. The quality function is dependent on a first effort, a second effort, and a variable weighting of the first and second values in relation to one another. The variable weighting weights the second effort lower for a first localization uncertainty of the robot.

Abstract: There are provided herein a superconductive composite tape and a method of fabrication thereof: a tape having a layer made of superconductive material positioned on a substrate is etched, for example by using laser equipment, in order to obtain a plurality of grooves through the superconductive material layer and delimit a plurality of superconductive filaments, which are substantially parallel to one another and to a longitudinal axis of the tape and are spaced out from one another.

Abstract: It is provided a method for making biaxially textured layers on non-textured substrates, in particular for making intermediate buffer layers in superconductive composite tapes. A non-textured substrate is provided with a surface having a roughness of less than approximately 10 nm and preferably less than approximately 5 nm. This is followed by a deposition step, in which a deposition material is deposited on said surface with direct evaporation without any concern for orientation; the deposition material grows in a natural texture on the surface to form an oriented layer with biaxial texture.

Abstract: There are provided herein a method and an apparatus for deposition of films of coating materials on a substrate, of particular use in obtaining superconductive composite tapes for deposition of films of superconductive oxides and/or buffer layers. A step of deposition of the film on the substrate is associated to a step of gas treatment in situ, in which a flow of gas is sent towards a working surface of the substrate or of the film growing on the substrate. The gas-treatment step is performed via ultrasound-expansion nozzles.

Abstract: Described herein are mixtures of cross-linking agents for the preparation of powder paints wherein the binder consists of polyester resins having free carboxyl groups. The cross-linking mixture itself comprises at least one Beta-hydroxyalkylamide compound having a Beta-hydroxy functional of 4 and at least one compound of formula (II) where R is linear or branched C2-C10 alkyl group having a Beta-hydroxy functionality of 2, wherein said cross-linked mixture has a mean Beta-hydroxy functionality of between 2.1 and 3.9.

Abstract: A process for the preparation of high concentration solutions of cellulose erivatives in organic solvents comprises contacting with paraformaldehyde and the solvent a cellulose which has a polymerization degree lower than 300 and preferably not significantly higher than 200. The solvent is selected from among dimethylformamide, dimethylacetamide and N-methylpyrrolidone.

Abstract: A process for the preparation of regenerated cellulose shaped bodies from inning dopes comprising solutions of methylol derivatives of cellulose in organic solvent selected from dimethylformamide, dimethylacetamide, dimethylsulphoxide and N-methyl-pyrrolidone is described. The cellulose derivative is coagulated from the spinning dope in a coagulating bath, the main component of which is a high-boiling alcohol capable of reacting with the free (para)formaldehyde and with the bound (para)formaldehyde of the methylol derivative to a degree varying with the temperature. It is possible to prepare filaments and yarns having excellent characteristics by starting from solutions having high CH.sub.2 O and cellulose concentrations and high MS ratios.

Abstract: A process for the preparation of regenerated cellulose formed bodies from lutions of cellulose derivatives in organic solvents is disclosed. The cellulose derivatives is firstly precipitated in a coagulating bath constituted of a cellulose non-solvent, non-regenerating organic liquid, then the coagulated body is drawn in subsequent baths and the cellulose is regenerated. The drawing and the regeneration occur, at least in part, concurrently.

Abstract: A process for the dissolution of cellulose in organic solvents such as dihylformamide, dimethylacetamide, and N-methylpyrrolidone is described which comprises contacting the cellulose with an excess of paraformaldehyde and with the solvent at elevated temperatures, preferably higher than 115.degree. C. The amount of paraformaldehyde used preferably corresponds to at least 13 CH.sub.2 O units per anhydroglucosidic unit of the cellulose. The solution obtained can be rendered stable at room temperature by heating it under stirring to lower the paraformaldehyde content, preferably to not less than 8 CH.sub.2 O units per anhydroglucosidic unit. Formed bodies of regenerated cellulose can be obtained from said solutions by coagulating them in an aqueous bath, which may be alkaline or may be a mixture of water and the solvent of the solution, or even by evaporating the solvent.

Abstract: A process for the preparation of formed bodies of regenerated cellulose f cellulose derivative solutions in dimethylsulphoxide is disclosed. The solution is extruded and coagulated in a coagulating bath which is a saline acqueous solution having a substantially non-alkaline or preferably a substantially neutral reaction, a formed body being thus produced.

Abstract: A process for the preparation of solutions of cellulose derivatives from which formed bodies, such as fibres or films, of regenerated cellulose can be obtained by coagulation and regeneration, e.g. by wet spinning, is disclosed. The cellulose is transformed into a methylol derivative containing more than 2 units of formaldehyde per anydroglucosidic unit, which derivative is soluble in organic solvents of the class consisting of polar aprotic solvents constituted by N-substituted amides, pyridine and formamide. The methylol derivative is prepared by treating cellulose with paraformaldehyde and dimethylsulphoxide. The methylol derivative is then dissolved in one of the aforesaid solvents, preferably dimethylformamide or dimethylacetamide, to provide spinnable viscous solutions from which formed bodies can be obtained, e.g. by spinning in an aqueous alkaline bath.