Abstract: Methods, computer systems, and apparatus, including computer programs encoded on computer storage media, for predicting an exchange-correlation energy of an atomic system. The system obtains respective electron-orbital features of the atomic system at each of a plurality of grid points; generates, for each of the plurality of grid points, a respective input feature vector for the electron-orbital features at the grid point; and processes the respective input feature vectors for the plurality of grid points using a neural network to generate a predicted exchange-correlation energy of the atomic system.

Abstract: A drone comprises at least one propeller for generating lift and an article containment area for containing an article to be carried by the drone. The floor of the article containment area comprises a dynamic support surface for supporting the article and allowing the article to move into, out of and through the article containment area. The dynamic support surface may be a conveyor belt forming the floor of the article containment area.

Abstract: A drone comprises at least one propeller for generating lift and an article containment area for containing an article to be carried by the drone. The floor of the article containment area comprises a dynamic support surface for supporting the article and allowing the article to move into, out of and through the article containment area. The dynamic support surface may be a conveyor belt forming the floor of the article containment area.

Abstract: A drone comprises at least one propeller for generating lift and an article containment area for containing an article to be carried by the drone. The floor of the article containment area comprises a dynamic support surface for supporting the article and allowing the article to move into, out of and through the article containment area. The dynamic support surface may be a conveyor belt forming the floor of the article containment area.

Abstract: A sorting conveyor comprising a modular conveyor belt having a plurality of carriers along its length. Each carrier comprises an opening through the belt associated with one or more doors movable between a closed position occluding the opening and supporting a load and an open position not occluding the opening to drop the load at a selected drop position.

Abstract: A sorting conveyor comprising a modular conveyor belt having a plurality of carriers along its length. Each carrier comprises an opening through the belt associated with one or more doors movable between a closed position occluding the opening and supporting a load and an open position not occluding the opening to drop the load at a selected drop position.

Abstract: A cooling device having internal pathways that define separate first and second flow circuits, each configured to direct a coolant at first and second mass flow rates to cool separate first and second surfaces of the cooling device. The internal pathways further define cooling channels into which the first and second flow circuits converge to cool separate third and fourth surfaces of the cooling device. The cooling device may be used simultaneously cool multiple electronic components that have similar or different cooling requirements.

Abstract: A drone comprises at least one propeller for generating lift and an article containment area for containing an article to be carried by the drone. The floor of the article containment area comprises a dynamic support surface for supporting the article and allowing the article to move into, out of and through the article containment area. The dynamic support surface may be a conveyor belt forming the floor of the article containment area.

Abstract: A conveyor system with a diverting conveyor belt crossing and intersecting a main conveyor line. The diverting conveyor belt has rollers on its outer side that rotate freely in the main conveying direction of the line. The downstream edge of the diverting conveyor is selectably tilted between a lowered, untilted position level with the main conveyor line and a raised, tilted position above the level of the main conveyor line. When the diverting belt is untilted and stopped, an article passes over the belt's rollers without being diverted. When the diverting belt is tilted and running, it diverts articles off the side of the conveyor line. In another version the rollers include an electrically conductive or magnetic material. A linear-motor stator under the diverting belt selectively actuates the conductive or magnetic rollers to draw undiverted articles across the belt.

Abstract: A missort prevention system prevents missorts in a sortation conveying system. The missort prevention system includes a sensor for detecting the presence of an unexpected article on a chute transitioning articles off of a conveyor and a missort preventer for blocking the further passage of the unexpected article on the chute.

Abstract: The subject technology provides configurations for receiving a query for data stored across data systems in which the query is associated with a user. It is determined if the user has permission to execute an operation from the query at a data in which the operation is executed upon at least one table provided by the data system. The subject technology determines if the operation corresponds to a cache object in a cache registry if the user has permission. Each cache object is owned by a cache manager user. A view associated with the user is created that provides temporary access privileges to the cache object corresponding to the operation in which the cache object includes results of the operation executed in the query and the cache object is owned by the cache manager user. The results of the operation are then provided in the created view to the user.

Abstract: A method for halftone printing of an image may include receiving image data of an image to be printed. The method may also include processing the image data to generate, for each printing element of a plurality of printing elements which are designed to sharingly print a single color component of a color space, or for each pass of a single printing element which is designed to pass a plurality of passes over a single print area when printing that color component, a halftone pattern for the image for that color, that was independently generated for that printing element or for that pass. The method may further include printing, by each printing element of the plurality of printing elements or in each pass of a single printing element, the halftone pattern that was independently generated for that printing element or for that pass.

Abstract: An article-diverting modular conveyor belt employs an article mover on a conveyor belt module for selectively moving a conveyed article towards a side of the module. The article mover may be a transversely-extending endless belt for carrying articles across the belt towards a side of the module. Rollers below the conveyor belt are selectively activated to induce movement of the article mover.

Abstract: The subject technology provides querying structured and unstructured data across disparate incompatible systems with a single language and connection point. Cost based optimizations are provided for executing the query. In some configurations, logical plans for executing a query are generated. For each of the logical plans, the subject technology generates a set of physical plans for executing the query on data systems, determines an execution cost for each physical plan from the physical plans, and selects a respective physical plan with a lowest determined execution cost among the determined execution cost for each physical plan. A physical plan is then selected for execution with a lowest execution cost among the selected respective physical plans of each of the logical plans. Data from an operation from the query may then be persisted and then used for generating a new set of logical and physical plans for executing a remaining set of operations from the query.

Abstract: A missort prevention system prevents missorts in a sortation conveying system. The missort prevention system includes a sensor for detecting the presence of an unexpected article on a chute transitioning articles off of a conveyor and a missort preventer for blocking the further passage of the unexpected article on the chute.

Abstract: A conductive paste composition contains a source of an electrically conductive metal, an alkaline-earth-metal boron tellurium oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor device substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.

Abstract: A conductive paste composition contains a source of an electrically conductive metal, a Ti—Te—Li oxide, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and establish electrical contact between it and the device.

Abstract: An apparatus for switching communication signals includes a pair of communication signal paths for carrying a differential serial communication signal. First and second pairs of switches are each respectively connected to the pair of communication signal paths to permit shared access to the pair of communication signal paths. A negative impedance converter (NIC) coupled to the communication signal paths produces negative capacitance to cancel parasitic capacitance associated with the switches. The NIC may be AC-coupled to the communication signal paths, and may employ a bipolar junction transistor (BJT) pair or other active devices.

Abstract: A sorting conveyor including a diverting conveyor and a bidirectional assist roller to help sort articles over the side of the diverting conveyor. The diverting conveyor includes, in one version, a conveyor belt with diverting rollers selectively actuated to push articles toward a side of the diverting conveyor. The bidirectional assist roller rotates on an axis parallel to the main conveying direction. As articles to be diverted reach the side of the diverting conveyor, the bidirectional roller rotates in a direction to assist articles over the side of the diverting conveyor and the bidirectional roller and onto an exit conveyor. When the diverting rollers are not actuated, the bidirectional roller rotates in the opposite direction to prevent articles from exiting the side of the diverting conveyor. In some instances, the bidirectional roller can be raised above the level of the diverting rollers to further block articles not selected for sorting from exiting over the side and onto the exit conveyor.

Abstract: An article-diverting modular conveyor belt employs an article mover on a conveyor belt module for selectively moving a conveyed article towards a side of the module. The article mover may be a transversely-extending endless belt for carrying articles across the belt towards a side of the module. Rollers below the conveyor belt are selectively activated to induce movement of the article mover.