Abstract: In an example of the disclosure, a heat exchange and flame arrest device for use with a subject gas includes tubing arranged to traverse a core, with the tubing defining a cooling fluid pathway. The core includes a gas flow inlet, a set of cooling fins, and a gas flow outlet. The gas flow inlet, the set of cooling fins, and the gas flow outlet collectively form a gas flow pathway for a subject gas. Each cooling fin of the set is positioned to form a gap between that cooling fin and an adjacent cooling fin. The gas flow inlet is to receive the subject gas. The combination of the gap between each cooling fin of the set and the cooling capacity of the cooling fluid pathway is sufficient to, if the subject gas has ignited, lower temperature of the subject gas to below autoignition temperature.

Abstract: Example implementations relate to computing device locations and computing devices having audio components thereon that change operational states. In some examples, a non-transitory computer-readable storage medium can include instructions that when executed cause a processor of an electronic device to determine a default host computing device of a plurality of computing devices, request a location of a first computing device of the plurality of computing devices using a sensor of the default host computing device, and request a location of a second computing device of the plurality of computing devices using the sensor. The instructions when executed can cause the processor to determine a first audio loop potential associated with the first computing device and a second audio loop potential associated with the second computing device, assign the first computing device as an active client and assign the second computing device as an inactive client.

Abstract: In some examples, a printed circuit board (PCB) card retention system can include a bracket, a fixed protrusion at a first location on the bracket, where the fixed protrusion includes a face, and a movable mechanism coupled to the bracket at a second location a distance away from the first location, where the movable mechanism includes a face, a positioning mechanism to position the face of the movable mechanism at a position of a plurality of positions that are each a different distance away from the face of the fixed protrusion, and a translation mechanism to permit the face of the movable mechanism, when at the position, to translate.

Abstract: In an example, a heated air knife and a negative pressure component are controlled to heat a subject gas and direct the subject gas through an evaporation channel at a target gas velocity that is above a flame propagation velocity for the subject gas. The evaporation channel is defined in part by a first surface, a nozzle of the air knife, a mixing zone, and a second surface substantially opposite the first surface.

Abstract: In some examples, the disclosure describes a device, comprising: a processor resource, and a non-transitory memory resource storing machine-readable instructions stored thereon that, when executed, cause the processor resource to: determine an emotion based on a facial expression of a user captured within an image, apply a plurality of alterations to the image to exaggerate the facial expression of the user when the emotion has continued for a threshold quantity of time, and remove the plurality of alterations to the image when the emotion of the user has changed.

Abstract: In one example in accordance with the present disclosure, a fluid ejection controller is described. The fluid ejection controller includes a firing board to pass control signals to a fluid ejection device to eject fluid from the fluid ejection device. A mount pivotally holds the firing board between a disengaged position where electrical pins of the firing board are not in contact with electrical pads of the fluid ejection device and an engaged position where the electrical pins are in contact with the electrical pads. The mount includes a slot to receive the fluid ejection device and at least one biasing spring to bias the firing board away from the fluid ejection device during insertion of the fluid ejection device. The fluid ejection controller also includes a handle coupled to a cam shaft to move the firing board between the disengaged position and the engaged position.

Abstract: An example device for image transfer can include a memory device, a service cubby to house a computing device and coupled to the memory device, a controller coupled to the memory device. The controller can retrieve, from the memory device, an image requested for transfer to the computing device in the memory device, perform an integrity check on the image, and transfer, via a local network of the device, the image to the computing device while the computing device is coupled to the service cubby.

Abstract: An example charging member has a conductive support, a conductive elastic body layer on the conductive support, a first surface layer on the conductive elastic body layer, and a second surface layer on the first surface layer. The first surface layer includes a binder resin and a first plurality of first particles dispersed in the binder resin of the first surface layer, the second surface layer includes the binder resin, a second plurality of first particles, and second particles, the second plurality of first particles and the second particles being dispersed in the binder resin of the second surface layer, and an average diameter d1 of the first particles is 3 ?m?d1?6 ?m and an average diameter d2 of the second particles is 20 ?m?d2?26 ?m.

Abstract: In an example, a method includes, at least one processor, in response to each of a plurality of requests, determining a halftone screen. Determining the halftone screen comprises encoding a signature pattern in the halftone screen, and halftone screens for different requests may be encoded with a different signature pattern. The halftone screen may be arranged such that, when applied to image data to provide a printed output, the pattern is discernible therein to provide a signature for the printed output.

Abstract: In some examples in accordance with the present description, an electronic device includes a cavity having an antenna. The cavity includes a light source and a lens to direct a light generated by the light source through an opening. The opening has a dimension that is proportional to an operating frequency of the antenna.

Abstract: In various examples, a printbar is formed from multiple modular fluid ejection subassemblies joined together through a molding process that provides for a continuous planar substrate surface. A mold may secure the modular fluid ejection subassemblies during a molding process in which a runner conveys a molding material to seams between the joined modular fluid ejection subassemblies.

Abstract: Examples of methods for part packing are described herein. In some examples, a first subset and a second subset of a set of parts are determined. In some examples a first packing of the first subset is determined. In some examples, a second packing of the second subset is determined based on the first packing.

Abstract: In one example in accordance with the present disclosure, a fluidic die is described. The fluidic die includes an array of fluid actuators grouped into primitives. The fluidic die also includes a fluid actuator controller to selectively activate fluid actuators via activation data. The fluidic die also includes an array of actuator evaluators, wherein each actuator evaluator of the fluidic die is coupled to a subset of the array of fluid actuators. The actuator evaluators selectively evaluate an actuator characteristic of a selected fluid actuator based on: an output of an actuator sensor paired with the selected fluid actuator, the activation data, and an evaluation control signal.

Abstract: An example apparatus comprises includes a first reservoir to store a biologic sample containing a cell, a microfluidic channel fluidically coupled to the first reservoir, and circuitry. The microfluidic channel includes a constriction region including a first circumference that is attenuated from remaining portions of the microfluidic channel, and a fluidic pump disposed within the microfluidic channel. The circuitry is to activate the fluidic pump to direct flow of the cell from the first reservoir to the microfluidic channel and through the constriction region.

Abstract: Systems, apparatuses, and methods may provide for technology that calibrates a printer alignment. Such calibration includes determining a tilt value for individual columns. A difference is determined between a first set of alignment values of nozzles of a first column of the trench and a second set of alignment values of nozzles of a second column of the trench. A dot offset value is determined based on the difference between the first and second set of alignment values of nozzles of the first and second columns. A top nozzle alignment value of the second column adjusted based on a difference compared against the first set of alignment values of nozzles of the first column and based on the dot offset value.

Abstract: A logic circuit, or method using the same, may include a memory storing (i) a plurality of partition groups, each partition group including a plurality of partitions, and (ii) a partition map defining an address and access mode for each of said partitions, defining different access modes for at least some of the partitions. The plurality of partition groups may comprise (i) a general use partition group including a first consumable level counter; (ii) a second use partition group including a second incrementally updatable consumable level counter; and (iii) a guide partition group including a use indicator to indicate which of the first and second consumable level counters to use.

Abstract: In one example in accordance with the present disclosure, a flexible linkage for a panel release mechanism is described. The example flexible linkage includes a body formed with a fold structure that unfolds from a first position to a second position under tension and becomes taut upon unfolding. The example flexible linkage also includes a first end of the body to couple to a handle of the panel release mechanism. The example flexible linkage also includes a second end of the body to couple to a latch mechanism.

Abstract: A print apparatus is disclosed. The print apparatus includes a photoconductive surface to receive a latent image representative of an image to be printed onto a printable substrate; a charging component to apply a voltage is to be applied to the photoconductive surface as the charging component moves relative to the photoconductive surface; and processing circuitry to receive data indicative of a measurement of a first current resulting from the voltage applied by the charging component; determine, responsive to detecting an increase in the measured first current relative to a reference current, the increase being greater than a first defined threshold current, that there exists a point defect under affecting the latent image; and generate instruction data responsive to determining that there exists a point defect under affecting the latent image. A method and a machine-readable medium are also disclosed.

Abstract: A toner cartridge includes a customer replaceable unit monitoring (CRUM) apparatus to store error information of a toner injection process of the toner cartridge using a toner refill apparatus. Based on the error information not being stored in the CRUM apparatus, an availability of a refill operation of the toner cartridge is identified based on a predetermined first reference value and an amount of toner detected in the toner cartridge, and, based on the error information being stored in the CRUM apparatus, the availability of the refill operation of the toner cartridge is identified based on a predetermined second reference value and the amount of toner detected in the toner cartridge.

Abstract: In one example in accordance with the present disclosure, a mobile device is described. The example mobile device includes an image sensor to capture an image frame. The example mobile device also includes a processor for performing simultaneous localization and mapping (SLAM). The example mobile device further includes a memory communicatively coupled to the processor and storing executable instructions that when executed cause the processor to: (1) determine a current location of the mobile device in a local map based on features extracted from the image frame; (2) perform a panoramic check to determine whether a threshold number of keyframes surrounding the current location have been captured; and (3) determine whether to add the image frame to a keyframe database for local mapping based on the panoramic check.