Abstract: An upper rail device for a seat of a vehicle includes: a lower plate in which a slot is formed, a drive housing mounted on the lower plate, a drive support that passes through the slot for insertion into a curved movement path of a lower rail, a motor with a reducer mounted on an upper surface of the drive housing, a drive shaft connected to an output portion of the reducer, a drive gear mounted on a lower end portion of the drive shaft and engaged with a driven gear mounted within the curved movement path of the lower rail. The upper rail device may be fastened to enable sliding movement along the curved movement path of the lower rail so that the seat can be moved in a diagonal or oblique direction depending on various purposes, which can improve a seat position movement adjustment.

Abstract: An anode for a secondary battery is provided, the anode for a secondary battery including: an anode current collector; a first anode mixture layer formed on at least one surface of the anode current collector, and including a first silicon-based active material and a first conductive material; and a second anode mixture layer formed on the first anode mixture layer, and including a second silicon-based active material and a second conductive material, wherein a content of the first silicon-based active material in the first anode mixture layer is lower than a content of the second silicon-based active material in the second anode mixture layer, and a Radial Breathing Mode (RBM) peak is observed in a Raman spectrum obtained from a surface of the second anode mixture layer.

Abstract: A silent marker, method of marking a petroleum product with the silent marker, and method of detecting the silent marker. The marker is an ester derivative of fluorescent material, and the silent marker may be detected by measuring the fluorescence generated from the selective hydrolysis of the ester moiety under enzymatic action.

Abstract: The present invention relates to marking a petroleum product with a silent marker, which is an ester derivative of fluorescent material, and to detecting the same. In accordance with the present invention, the silent marker may be detected by measuring the fluorescence generated from the selective hydrolysis of the ester moiety under enzymatic action.