Abstract: A piston for an internal combustion engine has a lower piston part and an upper piston part disposed on the lower piston part. The upper piston part has a top land that runs around its circumference, and a ring belt that runs around its circumference. At least the upper piston part consists of a sintered material.

Abstract: A piston for an internal combustion engine, has a lower piston part and an upper piston part disposed on the lower piston part. The upper piston part has a top land that runs around its circumference, and a ring belt that runs around its circumference. At least the upper piston part consists of a sintered material.

Abstract: A composition comprising an organic fluorophore having a structure of: or a derivative thereof; as well as articles of manufacture marked with the fluorophore, methods for marking articles with the fluorophore, and methods for producing a fluorescent fiber.

Abstract: A device for laser processing, in which the device includes: a laser including a resonator, the resonator being configured to generate a laser beam with a predetermined caustic during operation of the device; and an optical element to transform a laser beam generated by the resonator into a transformed laser beam having an annular intensity distribution in a plane perpendicular to a propagation direction of the transformed laser beam during operation of the device, in which the annular intensity distribution extends along the propagation direction of the transformed laser beam, and has, at a minimum diameter of a caustic of the transformed laser beam, a beam radius and a ring width corresponding to 50% of a maximum beam intensity in a radial direction of the transformed laser beam, and a ratio of the ring width to the beam radius is less than 0.6.

Abstract: The present disclosure provides Benzoxazinone compounds represented by the formula: wherein each R1, R2, R3, and R4 is independently selected from hydrogen, alkyl of 1-12 carbon atoms, substituted alkyl, aryl of 6-12 carbon atoms, substituted aryl, halo, and alkoxy; and R5 is selected from alkyl of 1-12 carbon atoms, substituted alkyl, aryl of 6-12 carbon atoms, substituted aryl, halo, and alkoxy; wherein each of the substituted alkyl and the substituted aryl groups have a substituent selected from alkyl, aryl, halo, and alkoxy. The present disclosure provides a mark having a benzoxazinone compound, and a method for applying the mark onto an article. Also provided is a process for preparing benzoxazinone compounds.

Abstract: An apparatus for monitoring a temperature and/or a temperature-dependent parameter of an optical element arranged in a path of a laser beam includes a measuring light source to produce measuring radiation and direct the measuring radiation to the optical element, a detector arranged to detect a portion of the measuring radiation that has passed through a passage region of the optical element, an evaluating device connected to the detector to monitor the temperature and/or the temperature-dependent parameter. The evaluating device is configured to determine the temperature and/or the temperature-dependent parameter based on an intensity of the measuring radiation detected by the detector in the passage region.

Abstract: A piston for an internal combustion engine, has a lower piston part and an upper piston part disposed on the lower piston part. The upper piston part has a top land that runs around its circumference, and a ring belt that runs around its circumference. At least the upper piston part consists of a sintered material.

Abstract: A composition comprising an organic fluorophore having a structure of: or a derivative thereof; as well as articles of manufacture marked with the fluorophore, methods for marking articles with the fluorophore, and methods for producing a fluorescent fiber.

Abstract: The present disclosure provides Benzoxazinone compounds represented by the formula: wherein each R1, R2, R3, and R4 is independently selected from hydrogen, alkyl of 1-12 carbon atoms, substituted alkyl, aryl of 6-12 carbon atoms, substituted aryl, halo, and alkoxy; and R5 is selected from alkyl of 1-12 carbon atoms, substituted alkyl, aryl of 6-12 carbon atoms, substituted aryl, halo, and alkoxy; wherein each of the substituted alkyl and the substituted aryl groups have a substituent selected from alkyl, aryl, halo, and alkoxy. The present disclosure provides a mark having a benzoxazinone compound, and a method for applying the mark onto an article. Also provided is a process for preparing benzoxazinone compounds.

Abstract: There is provided rare earth metal complexes of formula (I): wherein M is a cation, RE is a rare earth metal; X is a counter anion; and R1, R2, R3, and R4 are each independently selected from hydrogen, alkyl of 1-8 carbon atoms, aryl, halo, and alkoxy. Also provided is a composition of europium bis(2,2?-bipyridine-N,N?)-trinitrate with a diketonate dopant. The disclosure also provides processes for preparing the rare earth metal complexes. A mark comprising the rare earth metal complexes, and a method of applying the mark, are disclosed. The rare earth metal complexes may be used in printing systems, and for security applications.

Abstract: An article of manufacture marked with compositions comprising rare earth metal compounds which, due to their luminescence when irradiated with UV light, are suitable in particular for the marking of security-relevant items, such as documents or data carriers.

Abstract: In a laser processing machine for processing workpieces using a laser beam (2), a telescope (1) for widening the laser beam (2) comprises an ellipsoidal mirror (3) and a paraboloidal mirror (4) whose axes of rotation (6) extend parallel, in particular collinear, to each other. This orientation permits precise production of the reflecting surfaces of the two mirrors through one single clamping (e.g. through diamond lathe) such that later adjustment is not required.

Abstract: An interior fitting for a vehicle, particularly for a motor vehicle, comprises a supporting body, which is provided, at least in areas, with a sensor-functional planar structure and with a covering layer that is located on the side facing the interior. Different output signals can be generated by means of the planar structure according to the location of action thereupon. According to the invention, the covering layer is flexibly designed and completely covers the sensor-functional planar structure.

Abstract: Rare earth metal compounds are described which, due to their luminescence when irradiated with UV light, are suitable in particular for the marking of security-relevant items, such as documents or data carriers.

Abstract: Fluorescent pigment compounds comprising aryl-ureido benzoxazinone compounds of the general formula (I): wherein R1 is an substituted or unsubstituted aryl group, R2 and R3 are each independently selected from an H atom, an alkyl group, an alkoxy group, an alkylcarboxy group and a halogen atom, X is a carbon or sulfur atom and n is an integer of 1 or more. Many of the compounds of this class produce a yellow, generally deep yellow, emission at wavelengths of about 560 to about 585 nm when excited by an appropriate UV source. These compounds produce fluorescence making them useful as fluorescent pigments, those compounds providing emission wavelengths within the range of from about 560 to about 585 or higher when excited by a UV source are particularly useful. Those compounds having this emission spectra for the compounds makes these compounds particularly useful as pigments in security applications, particularly as pigments for use in security inks and fibers.

Abstract: An article of manufacture marked with compositions comprising rare earth metal compounds which, due to their luminescence when irradiated with UV light, are suitable in particular for the marking of security-relevant items, such as documents or data carriers.

Abstract: A process for producing a phenothiazinium compound comprising the step of: reacting phenothiazine, in the presence of a halogen, with at least one amine selected from the group consisting of: wherein Z is CH2, O, S, SO2, NH, NCH3, NC2H5, NCH2CH2OH or NCOCH3, and R1 and R2 are each independently linear or branched CnH2nY.

Abstract: In a laser processing machine for processing workpieces using a laser beam (2), a telescope (1) for widening the laser beam (2) comprises an ellipsoidal mirror (3) and a paraboloidal mirror (4) whose axes of rotation (6) extend parallel, in particular collinear, to each other. This orientation permits precise production of the reflecting surfaces of the two mirrors through one single clamping (e.g. through diamond lathe) such that later adjustment is not required.

Abstract: In order to be able to ascertain the position of the bone in the body without complicated procedures in a process for the preoperative determination of the positioning data of endoprosthetic parts of a central joint relative to the bones forming the central joint, a respective outer articular point is determined by way or movement of the bones about a respective outer joint which is located at the end of the two bones facing away from the central joint. An articular point is determined for each of the two bones in the area of the central joint, and a direction characteristic for each of these bones is determined by way of a straight-line connection of the two articular points obtained in this manner for the two bones. The orientation of the endoprosthetic parts relative to this characteristic direction is then determined. Apparatus for carrying out the process is also provided.

Abstract: A process for producing a phenothiazinium compound comprising the step of: reacting phenothiazine, in the presence of a halogen, with at least one amine selected from the group consisting of: wherein Z is CH2, O, S, SO2, NH, NCH3, NC2H5, NCH2CH2OH or NCOCH3, and R1 and R2 are each independently linear or branched CnH2nY; and replacing the halogen with a non-halide counteranion.