Abstract: The technology relates to managing nighttime power for solar-powered vehicles. A system may include a sunrise estimator for estimating a time until a next sunrise, a battery state estimator for estimating a battery state, a critical battery estimator for determining a battery threshold, below which subsystems may be powered off, and an alert monitor to determine, and communicate to the solar-powered vehicle, a charge threshold and a restart charge threshold. A method may include operating a vehicle in an operational power mode, estimating a time until a next sunrise, estimating a battery state, determining a preservation battery threshold based on the estimated time until the next sunrise and the estimated battery state, determining a minimum charge threshold based on the preservation battery threshold, monitoring a battery charge level of the vehicle throughout the night, and if the battery charge level drops below the minimum charge threshold, implementing a preservation power mode.

Abstract: Methods, systems, and apparatus, including computer programs encoded on computer storage media, for identifying one or more invalid images characterizing the brain of a patient. One of the methods includes obtaining a data object comprising one or more images characterizing a brain of a patient; processing the data object to determine one or more particular images that are invalid; and providing, for display to a user on a graphical interface, data characterizing i) each particular image and ii) a respective reason that each particular image is invalid selected from a set of possible reasons that an image may be invalid.

Abstract: A system for controlling an aerial vehicle includes an aerial vehicle, a ballast coupled to the aerial vehicle, a server including a processor and a memory, and a wireless communication link that communicatively couples the aerial vehicle and the server. the memory stores instructions that, when executed by the processor, cause the server to receive weather data, determine, based on the weather data, that the aerial vehicle is experiencing, or is expected to experience, weather that satisfies a predetermined criterion, and cause the aerial vehicle to decouple at least a portion of the ballast based on a result of the determination.

Abstract: A system for controlling an aerial vehicle includes an aerial vehicle, a ballast coupled to the aerial vehicle, a server including a processor and a memory, and a wireless communication link that communicatively couples the aerial vehicle and the server. the memory stores instructions that, when executed by the processor, cause the server to receive weather data, determine, based on the weather data, that the aerial vehicle is experiencing, or is expected to experience, weather that satisfies a predetermined criterion, and cause the aerial vehicle to decouple at least a portion of the ballast based on a result of the determination.

Abstract: A system for controlling an aerial vehicle includes an aerial vehicle, a ballast coupled to the aerial vehicle, a server including a processor and a memory, and a wireless communication link that communicatively couples the aerial vehicle and the server. the memory stores instructions that, when executed by the processor, cause the server to receive weather data, determine, based on the weather data, that the aerial vehicle is experiencing, or is expected to experience, weather that satisfies a predetermined criterion, and cause the aerial vehicle to decouple at least a portion of the ballast based on a result of the determination.

Abstract: A tongue and groove press tool to assist carpenters in holding material overhead while nailing roofing material in place comprising a tongue and groove press tool to assist carpenters in holding material overhead while nailing, the held material in place comprising a base adapted to be secured to an existing stud of a structure receiving the material, the base including a channel member and a downwardly facing longitudinal extension, a rod formed of extension front and rear members, the forward end of the push rod having a support for receiving and supporting roofing material overhead to be nailed, and a handle having a grip at the lower end and a clevis at the upper end whereby when the base is secured to a stud and a handle pushed forwardly with an edge of the material to be supported is in contact with the base, then the tool will hold the material in place.