Abstract: An ultrasonic system may include: an oral care device including: a head; a plurality of teeth cleaning elements extending from a first side of the head; and an ultrasound module including an ultrasound transceiver positioned in the head, the ultrasound transceiver configured to produce an ultrasound signal on the first side of the head and to generate a detection signal from a reflected ultrasound signal; and a processing module operably coupled to the ultrasound module to receive the detection signal; wherein the processing module includes a programmable processor configured to process the detection signal non-linearly with respect to time by first identifying a first reflection representing a surface of a tooth and then determining whether a second reflection peak is present in the detection signal at a time prior to the first reflection peak, the second reflection peak representing a biofilm on the surface of the tooth.

Abstract: An ultrasonic system may include: an oral care device including: a head; a plurality of teeth cleaning elements extending from a first side of the head; and an ultrasound module including an ultrasound transceiver positioned in the head, the ultrasound transceiver configured to produce an ultrasound signal on the first side of the head and to generate a detection signal from a reflected ultrasound signal; and a processing module operably coupled to the ultrasound module to receive the detection signal; wherein the processing module includes a programmable processor configured to process the detection signal non-linearly with respect to time by first identifying a first reflection representing a surface of a tooth and then determining whether a second reflection peak is present in the detection signal at a time prior to the first reflection peak, the second reflection peak representing a biofilm on the surface of the tooth.

Abstract: A device housing includes a main body, a metallic layer, and a paint layer. The main body defines a first surface and a second surface adjacent to each other. The metallic layer is formed on the first surface, and the paint layer is formed on the second surface. The device housing further defines a groove between the first surface and the second surface to separate the metallic layer and the paint layer. An apparatus for making the device housing is also described.

Abstract: A device housing includes a main body, a metallic layer, and a paint layer. The main body defines a first surface and a second surface adjacent to each other. The metallic layer is formed on the first surface, and the paint layer is formed on the second surface. The device housing further defines a groove between the first surface and the second surface to separate the metallic layer and the paint layer. An apparatus for making the device housing is also described.

Abstract: The invention provides a photographic element comprising a light-sensitive silver halide emulsion layer having associated therewith a 1-aryl-2-pyrazolin-5-one coupler bearing a 4-aryloxy coupling-off group containing a group capable of releasing a photographically useful group (PUG) wherein:(1) the 1-aryl-2-pyrazolin-5-one ring contains a 3-cyano substituent or a substituent linked to the 3-position by an acyl group, thio group, sulfoxide group, sulfone group, or a tetrahedral carbon atom which tetrahedral carbon atom has bonded thereto three other atoms or substituent groups for which the sum of the .sigma.* values is at least 1.5; and(2) the 4-aryloxy coupling-off group:(a) contains ring substituents selected so that the sum of the Hammett's sigma constants for all substituents on the aryloxy ring is at least 0.