Mission-oriented drone networks have been widely used for structural inspection, disaster monitoring, border surveillance, etc. Due to the limited battery capacity of drones, mission execution strategy impacts network performance and mission completion. However, collaborative execution is a challenging problem for drones in such a dynamic environment as it also involves efficient trajectory design. We leverage multi-agent reinforcement learning (MARL) to manage the challenge in this study, letting each drone learn to collaboratively execute tasks and plan trajectories based on its current status and environment. Simulation results show that the proposed collaborative execution model can successfully complete the mission at least 80% of the time, regardless of task locations and lengths, and can even achieve a 100% success rate when the task density is not way too sparse. To the best of our knowledge, our work is one of the pioneer studies on leveraging MARL on collaborative execution for mission-oriented drone networks; the unique value of this work lies in drone battery level driving our model design.

"Call of Duty: Modern Warfare" accomplishes its mission on multiple fronts with a compelling and dramatic single-player story campaign. Firstly, the video game (out Oct. 25 for PlayStation 4, Xbox One and PCs, rated Mature for ages 17-up) lives up to its namesake, "Call of Duty 4: Modern Warfare," the 2007 game that helped launch the video game franchise towards its stratospheric station as a perennial multibillion-dollar seller. The non-stop action spans the globe and keeps the player guessing where the story is headed. And, the story campaign alone suggests "Call of Duty" will continue the series' successful run – it's been the top-selling game each of the last ten years and topped $1 billion in sales annually for the last 15 years. This one has a special coop mode and a 2-vs.-2

The astronauts set for the Artemis mission to the moon will put on suits that may look like today's gear, but will be redesigned with new technology to accomplish more complex tasks. The new space suits are set to allow for better mobility, allowing them to lift their arms and objects over their head and flexibility at the hips and knees, for smoother travel over the lunar surface. NASA also plans to take full-body, 3D scans of each astronaut to provide them with the most comfort and broadest range of motion. A famous video of Gene Cernan, the last man to walk on the moon, floating around the web that shows the American astronaut bunny hopping across the lunar surface – and this is one of the issues NASA hopes to eliminate with the new design. The new space hear is set to have interchangeable parts that can be used for spacewalks in microgravity or on a planetary surface.