Abstract: In an example, a method includes receiving an indication of an electrical parameter associated with at least part of a computing device. The method further includes determining whether or not the indication is indicative of an expected electric field distribution associated with a specified hardware configuration for the computing device.

Abstract: A device may include a dispensable substance container to hold a dispensable substance; a dispensing nozzle attached to the dispensable substance container to dispense the dispensable substance out of an opening in the dispensing nozzle; and a frangible obstruction encompassing the dispensing nozzle and obstructing the opening of the dispensing nozzle wherein the frangible obstruction is to slide along the dispensing nozzle to uncover the opening when broken free from the dispensing nozzle by a wall of a receiving container during an engagement between the dispensable substance container and the receiving container.

Abstract: An example virtual reality (VR) system includes a VR headset, a plurality of monitoring stations, and an image processing device. Each of the monitoring stations includes an image sensor to capture images of the VR headset and an environment in which the VR headset is used. The image processing device is to process the images captured by the monitoring stations to detect an object in the environment, and to transmit, to the VR headset, information that includes notification of the object detected.

Abstract: In an example, a print apparatus comprises an intermediate transfer member to receive thermoplastic print agent from a photoconductive surface, a rotatably mounted endless cleaning surface to receive a layer of thermoplastic print agent from the intermediate transfer member and a heater, to heat the endless cleaning surface. The endless cleaning surface may be to engage with the intermediate transfer member when heated to transfer residue from the intermediate transfer member to the layer of thermoplastic print agent on the endless cleaning surface.

Abstract: In one example in accordance with the present disclosure, a printing fluid container for a printing system is described. The printing fluid container includes a container body for holding printing fluid, a collar connected to the container body, and a cap removably engaging the collar. The collar has a plurality of collar teeth extending peripherally around the collar. The cap has a plurality of cap teeth extending peripherally around the cap. The cap teeth are configured for interfitment with the collar teeth such that rotation of the cap about the longitudinal axis in a first rotational direction effects cam-actuated removal of the cap from the collar.

Abstract: In some examples, a printer includes a feed mechanism to distribute a build material on a platform and a heater. The heater includes a lamp, a reflector, and a radiant energy absorbing baffle located between the lamp and the reflector. The lamp and the reflector are to direct radiant energy toward the platform, and the radiant energy is to heat the build material.

Abstract: An example non-transitory machine-readable storage medium includes instructions to, when executed by the processor, identify an object depicted in a video scene, wherein the video scene is displayed in a graphical user interface (GUI). The example instructions are executable to 1) identify coordinates of the object depicted in the video scene, wherein the coordinates are relative to the GUI and 2) identify coordinates of an inset window which is smaller than the GUI and overlaps the video scene. The example instructions are executable to compare the coordinates of the object with the coordinates of the inset window to determine an overlap of the inset window with the object. Responsive to an identified overlap of the inset window and the object, the instructions are executable to alter a display characteristic of the inset window to avoid the overlap of the inset window with the object.

Abstract: A hardening agent for three-dimensional printing includes a boron-containing hardener and a jettable liquid vehicle, and is devoid of a pigment and a dye. The boron-containing hardener is selected from the group consisting of a water dispersible boron-containing hardener present in an amount ranging from about 6 wt % to about 15 wt %, and a water soluble boron-containing hardener present in an amount ranging from greater than 1 wt % to about 20 wt %.

Abstract: In one example of the disclosure, a system for print fluid recirculation includes a supply manifold, a recirculation manifold, a printbar, and a recirculation pathway. The printbar includes a plurality of printheads that are in fluid communication with the supply manifold, and the recirculation manifold. The recirculation pathway is in fluid connection with the supply manifold and the recirculation manifold, and is to enable recirculation of print fluid at a controlled flow through the plurality of printheads.

Abstract: A printing device and method is described comprising: controlling movement of a printing medium along a printing medium path to position the printing medium relative to at least one printhead to allow printing on the printing medium by the at least one printhead; and applying a plurality of respective elastic forces in a direction substantially perpendicular to the printing medium path, wherein the respective elastic forces are applied by a plurality of elastic elements of a modular assembly arranged laterally across a width of the printing medium path, wherein the printing medium acts against the elastic forces of the respective elastic elements of the modular assembly.

Abstract: According to examples, an apparatus may include a processor and a memory on which are stored machine-readable instructions that when executed by the processor, may cause the processor to receive an image and identify contents in the received image. The processor may identify candidate regions on the image at which a predefined object is placeable. In some examples, the processor may assign scores to the identified candidate regions based on relative positions of the identified candidate regions to respective ones of the identified contents in the image. Based on the assigned scores, the processor may select a candidate region among the identified candidate regions at which the predefined object is to be placed. The processor may determine a size and a position of the predefined object based on the selected candidate region, and may output the determined size and the position of the predefined object on the image.

Abstract: Aspects of the present disclosure are directed to an apparatus including a circuit region and a fluidic region. In a particular example, the circuit region with logical circuits thereon, includes a thermal oxide layer on a silicon substrate, and a dielectric layer over the field oxide layer, the dielectric layer including a doped dielectric film. The microfluidic device further includes a fluidic region including fluid ports formed through a surface of the apparatus and including an un-doped dielectric film. The fluidic region includes an aperture in the dielectric layer, where the aperture is defined by a dielectric wall which forms part of the dielectric layer. A sealing film deposited over the dielectric wall may prevent the doped dielectric film from contacting fluid contained in the fluid port.

Abstract: An example self-priming microfluidic structure can include a microfluidic channel including a floor and a ceiling. A channel height is defined as a distance between the floor and the ceiling. A channel height step can be in the floor, or ceiling, or both. The channel height downstream of the channel height step can be greater than the channel height upstream of the channel height step. An interior pillar can be positioned in the microfluidic channel extending from the floor to the ceiling. The interior pillar can include a widening portion at an upstream end of the interior pillar and a tapering portion at a downstream end of the interior pillar. The interior pillar can overlap the channel height step so that the interior pillar is partially upstream of the channel height step and partially downstream of the channel height step.

Abstract: A print apparatus is disclosed. In an example, the print apparatus comprises: a photoconductive surface to receive a latent image representative of an image to be printed onto a printable substrate; a plurality of print components, each print component having a surface movable relative to the photoconductive surface, wherein a current or voltage is to be applied between the print component surface and the photoconductive surface; and processing circuitry to: measure a current or voltage between each print component surface and the photoconductive surface; responsive to detecting a deviation in the measured current or voltage from a reference current or voltage in respect of any of the plurality of print components, determine that there exists a defect associated with the photoconductive surface; and determine, based on the amount of deviation of the measured current or voltage from the reference current or voltage, an indication of the size of the defect.

Abstract: An example non-transitory computer-readable storage medium comprises instructions that, when executed by a processing resource of a computing device, cause the processing resource to, responsive to identifying a spatial area of attention of a gaze of a user, enhance audio associated with the spatial area of attention. The instructions further cause the processing resource to modify the enhancing based at least in part on a physiological observation of the user while hearing the audio.

Abstract: An apparatus includes a wire connector configured to receive a connection to an external device. The external device includes a speaker and is configured to output audible sounds. The apparatus includes a connection detection circuit configured to determine whether the external device has connected to the apparatus through the wire connector. The apparatus includes an output test circuit configured to, upon detection of a connection to the external device, issue a test signal to the external device, evaluate a response to the test signal, the response based upon a resistance value within the external device, and determine an identity of the external device based upon the response to the test signal.

Abstract: Systems, apparatuses, and methods of fluid delivery for liquid electrophotography printing. A fluid delivery apparatus includes a charged ink source, a supplemental fluid source, a working suspension tank in fluid communication with the charged ink source and the supplemental fluid source, a sensor, and an optical density control unit. The charged ink source is to store a charged ink mixture including charge directors and toner particles. The supplemental fluid source is to store a supplemental fluid including imaging oil. The working suspension tank is to store a working suspension mixture including the charge directors, the toner particles, and the imaging oil. The sensor is to monitor an optical density of print output of the liquid electrophotography printing apparatus. The optical density control unit is to determine whether to supply an uncharged ink mixture to the working suspension tank in response to the monitored optical density indicating electrical fatigue.

Abstract: This disclosure describes three-dimensional printing kits, methods, and systems for three-dimensional printing with triethylene glycol fusing agents. In one example, a three-dimensional printing kit can include a powder bed material including polymer particles and a fusing agent to selectively apply to the powder bed material. The fusing agent can include water, a radiation absorber, and triethylene glycol in an amount from about 20 wt % to about 35 wt %. The radiation absorber can absorb radiation energy and convert the radiation energy to heat to fuse the powder bed material.

Abstract: A light pipe is mounted to a support structure along a length of the light pipe. The light pipe has an end at which light enters the light pipe. Light exits the light pipe at an emissive surface of the light pipe. A reflective backing is positioned at a surface of the light pipe opposite the emissive surface. A compliant member between the reflective backing and the support structure maintains the reflective backing flush against the surface of the light pipe.