The Space-Air-Ground-Sea integrated network calls for more robust and secure transmission techniques against jamming. In this paper, we propose a textual semantic transmission framework for robust transmission, which utilizes the advanced natural language processing techniques to model and encode sentences. Specifically, the textual sentences are firstly split into tokens using wordpiece algorithm, and are embedded to token vectors for semantic extraction by Transformer-based encoder. The encoded data are quantized to a fixed length binary sequence for transmission, where binary erasure, symmetric, and deletion channels are considered for transmission. The received binary sequences are further decoded by the transformer decoders into tokens used for sentence reconstruction. Our proposed approach leverages the power of neural networks and attention mechanism to provide reliable and efficient communication of textual data in challenging wireless environments, and simulation results on semantic similarity and bilingual evaluation understudy prove the superiority of the proposed model in semantic transmission.

George Gorman, Long Island regional director for the NY State office of Parks and Recreation, explains how drones are being used to track sharks and ensure swimmers' safety. Authorities are using drones to monitor Long Island waters following a flurry of recent incidents with sharks off New York shores. Earlier this week, five people reported being bitten by sharks at popular beaches. In response to encounters there and in other police jurisdictions, the Suffolk County Police Department said it would increase its shark patrols, using drones for an aerial view. "While residents are encouraged to enjoy the summer at the beach, swimmers should remain vigilant when in the water. If you see a shark, or a pod of bunker fish that attract the predators, calmly exit the water and alert the lifeguard on duty or a local official," the department said on Facebook.

The last time state lawmakers tried to place limits on drones in the skies above California, they were met with the veto of Gov. Jerry Brown, who said he did not want to create new crimes to enforce bans on the use of such devices. This year, the pushback to new rules is coming not from the governor but through the lobbying efforts of a budding industry that hopes to influence policy at the state Capitol and nationwide. As drones multiply in number and category, cities and states want to set boundaries. But drone manufacturers and associations this legislative session boosted their politicking, successfully beating back several bills they said would create a patchwork of laws that vary by state and hinder innovation. "We want to solve problems and address concerns, but to do it in a way that is constantly clear across the country," said Brendan Schulman, vice president of policy and legal affairs for DJI Technology Co., the world's largest drone maker. "Otherwise, it will be too confusing for commercial users and consumers to understand what the rules are when they travel from place to place."