Abstract: A fluid ejection system may include a fluidic die comprising at least one fluid ejection device, at least one electrical impedance sensor to detect at least one impedance value during a plurality of stages of existence of a drive bubble in at least one firing chamber associated with the at least one fluid ejection device, and a service station wherein, based on the impedance values detected, the printing system services the at least one fluid actuator.

Abstract: Aspects of the present invention are directed to systems and processes which enable the simultaneous treatment of a wastewater stream comprising biodegradable and adsorbable contaminants within a single treatment vessel.

Abstract: A fluidic die includes a plurality of fluid chambers, each fluid chamber including an electrode exposed to an interior of the fluid chamber and having a corresponding fluid actuator operating a high voltage separated from the fluid chamber and electrode by an insulating material, and monitoring circuitry, operating at a low voltage, to monitor a condition of each fluid chamber. For each fluid chamber the monitoring circuitry includes a sense node and a conductor connecting the electrode to the sense node, the conductor having a geometry to form at least one region of higher current density relative to remaining portions of the conductor, the at least one region of higher current density to fail and create an open to protect the low-voltage monitoring circuitry in response to a fault current caused by a short circuit of the high voltage fluid actuator to the electrode.

Abstract: In one example, a fault-tolerant printhead includes an array of fluid actuators. Each fluid actuator includes a fault sensor to detect a faulted fluid actuator and a per-fluid actuator memory to store a fault sensor state of the fluid actuator. The fault-tolerant printhead also includes an interface to read a state of each per-fluid actuator memory.

Abstract: A fluidic die may include at least one fluidic passageway, at least one electrode disposed within the at least one fluidic passageway, and control circuitry to activate the electrode within the fluidic die. An impedance sensed at the electrode corresponds to a particle concentration within the fluid. The control circuitry activates the electrode during a separate pulse group assigned to the activation of the electrode among at least one other pulse group assigned to an activation of at least one fluid actuator within a column group.

Abstract: A fluidic die includes fluid chambers, each including an electrode exposed to an interior of the fluid chamber and each having a corresponding fluid actuator operating at a high voltage. The fluidic die further includes monitoring circuitry, operating at a low voltage relative to the fluid actuator, to monitor a condition of each fluid chamber, for each chamber the monitoring circuitry including a connection structure and a select transistor and a pulldown transistor connected to the electrode via the connection structure. The connection structure and select and pulldown transistors together structured to form electrically conductive paths with electrical resistances to protect at least the select transistor from fault damage if the high voltage fluid actuator short-circuits to the electrode.

Abstract: In some examples, a fluidic die includes a plurality of fluid actuators, an actuation data register to store actuation data that indicates each fluid actuator of the plurality of fluid actuators to actuate, and a plurality of mask registers to store respective different mask data patterns, each mask data pattern of the different mask data patterns indicating a respective set of fluid actuators of the plurality of fluid actuators enabled for actuation for a respective actuation event.

Abstract: In some examples, a fluidic die includes a plurality of fluid actuators to cause ejection of fluid towards a target, an actuation data register to store actuation data that indicates each fluid actuator of the plurality of fluid actuators to actuate, and a controller to use different drop weight patterns and actuation data in the actuation data register to dispense fluid of different drop weights using the plurality of fluid actuators. Each drop weight pattern of the different drop weight patterns indicates a respective set of fluid actuators of the plurality of fluid actuators enabled for actuation, and a first drop weight pattern of the different drop weight patterns corresponding to a first drop weight, and a second drop weight pattern of the different drop weight patterns corresponding to a second drop weight different from the first drop weight.

Abstract: Apparatus include a first laser diode situated to emit a beam from an exit facet along an optical axis, the beam as emitted having perpendicular fast and slow axes perpendicular to the optical axis, a first fast axis collimator (FAC) optically coupled to the beam as emitted from the exit facet and configured to direct the beam along a redirected beam axis having a non-zero angle with respect to the optical axis of the first laser diode, a second laser diode situated to emit a beam from an exit facet of the second laser diode along an optical axis parallel to the optical axis of the first laser diode and with a slow axis in a common plane with the slow axis of the first laser diode, and a second fast axis collimator (FAC) optically coupled to the beam as emitted from the exit facet of the second laser diode and configured to direct the beam along a redirected beam axis having a non-zero angle with respect to the optical axis of the second laser diode.

Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of fluid actuators. Wires are disposed at various points along at least one of a supply bus and a return bus that are coupled to the actuators in the array. The wires output a voltage level at a corresponding point of the respective bus. At least one comparator compares a voltage of a selected wire against a voltage threshold. At least one fault capture device to output a signal indicating a fault based on the output of the at least one comparator.

Abstract: A chair preferably configured for conversion between a preferred storage configuration and at least one preferred use configuration. When in one of the use configurations, the chair may have a recliner mechanism which allows the angle of the back support assembly relative to the seat frame to be progressively changed such that the back support assembly may be positioned at a reclined angular position. When in the preferred storage configuration, the back support assembly may be positioned at least partially within the seat frame to decrease the area of the footprint of the chair to facilitate storage of the chair.

Abstract: Disclosed herein are systems and methods for using machine learning for image-based spoof detection. One embodiment takes the form of a method that includes obtaining an input-data set that includes a plurality of images captured of a biometric-authentication subject by a plurality of cameras of a camera system. The method also includes inputting the input-data set into a trained machine-learning module, and processing the input-data set using the machine-learning module to obtain, from the machine-learning module, a spoof-detection result for the biometric-authentication subject. The method also includes outputting the spoof-detection result for the biometric-authentication subject.

Abstract: In one example in accordance with the present disclosure, a fluidic die is described is described. The fluidic die includes an array of fluid actuators grouped into zones. Each zone includes a number of fluid actuators and at least one fault detection device. The fault detection device includes a comparator to compare at least one of a representation of a supply voltage and a return voltage supplied to the zone against a voltage threshold. The fault detection device also includes a fault capture device to store an output of the comparator.

Abstract: A modular material tracking system is provided for tracking material stored on and drawn from a reel using a modular system. The modular material tracking system may include a detection element, digital logic components, location receiver, enclosure, analytic components, interface component, sensor module, and plate module. One or more sensors relative to the reel may detect a position indicative of forward or reverse reel rotation. A processor may analyze signals to count rotations of the reel, which is savable in memory. A battery may provide power. The system may also record the time and location associated with rotations. A method for tracking material stored on and drawn from a reel using a modular material tracking system is also provided.

Abstract: A fluidic die includes an array of nozzles, each nozzle to eject a fluid drop in response to a corresponding actuation signal having an actuation value. Nozzle select logic provides for each nozzle a nozzle select signal having a select value or a non-select value. Actuation logic provides the respective actuation signal for each nozzle, the actuation logic to receive one or more drop weight signals, and for each nozzle select signal having the select value, to provide an actuation signal having an actuation value to the corresponding nozzle and/or to one or more neighboring nozzles based on a state of the one or more drop weight signals.

Abstract: Vaccination methods to control PCV2 infection with different PCV2 subtypes are disclosed. Specifically, a PCV2 subtype b (PCV2b) ORF2 proteins or immunogenic compositions comprising a PCV2b ORF2 protein are used in a method for the treatment or prevention of an infection with PCV2 of the same PCV2b and/or different subtype; the reduction, prevention or treatment of clinical signs caused by an infection with PCV2 of the same PCV2b or a different subtype; and/or the prevention or treatment of a disease caused by an infection with PCV2 of the same PCV2b and/or a different subtype. The present invention in particular relates to PCV2 subtype b (PCV2b) ORF2 proteins characterized in that they contain at least one mutation in the BC loop that such that the expressed protein is preferably expressed in a higher amount compared to a PCV2 ORF2 protein that does not contain such mutation.

Abstract: A microfluidic device for validating fluidic uniformity may include a chamber defined in the microfluidic device. and a plurality of sensors located within the chamber. The plurality of sensors being positioned within the chamber in a symmetrical location about a least one element of the chamber. The microfluidic device may also include control logic to activate the sensors to measure a property of a fluid within the chamber and determine whether the element affects the measurement of the property of the fluid provided by the sensors. The control logic may also, in response to a determination that the element does not affect the measurement of the property of the fluid provided by the sensors, determine if the property measured by all the sensors at their respective symmetrical locations within the chamber are uniform within a range of values.

Abstract: A fluidic die may include a fluidic channel, and an electrode disposed within a fluidic channel of the fluidic die to determine if a difference between an initially-measured impedance and a subsequently-measured impedance as measured by the electrode indicates a completion of a purging of an initial fluid from the fluidic die and a replacement with a second fluid.