Abstract: Systems, methods, and software for operating an unmanned aerial vehicle (UAV). A method includes capturing a video stream using one or more camera sensors of the UAV. The method includes transmitting data representative of the video stream to a ground station communicably coupled to the UAV. The method includes determining one or more performance characteristics of a communications link between the UAV and the ground station. The method includes adjusting a resolution of the video stream according to the one or more performance characteristics of the communication link. Embodiments of the present technology provide continuity of video quality for viewing by UAV users at ground stations responsive to variations in video data transmission capacity during flight operations with minimal, or no, detrimental impact on user experience.

Abstract: Systems, methods, and software for operating an unmanned aerial vehicle (UAV) having one or more camera sensors. A method includes capturing a video stream using the camera sensor(s) of the UAV. The method includes determining a capability of a ground station communicably coupled to the UAV to annotate the video stream. In response to determining that the ground station is capable to annotate the video stream, the method includes transmitting the video stream to the ground station without annotations. Alternatively, in response to determining that the ground station is incapable to annotate the video stream, drawing annotations on the video stream to generate an annotated video stream, and transmitting the annotated video stream to the ground station. Embodiments of the present technology provide enhanced interoperability between UAVs and different types of ground stations to improve streamlining and quality of user experiences as compared to conventional systems and techniques.

Abstract: A solid object is rotated in the central pool of molten metal that is formed by using an arc to melt a continuously fed metal wire and depositing the melted wire between the facing edges of two base metals to be joined. The stirring generated by the rotation in the pool moves hotter metal in the central region to its boundary adjacent to the facing edges. This stirring generated movement of molten metal is expected to better heat the facing edges so that the molten metal can better fuse with the facing edges. The stirring generated fluid flow within the molten pool also changes the solidification of the molten metal and the formation of the resultant grains.