With the rapid development of 6G space–air–ground integrated communication networks, low Earth orbit (LEO) satellite constellations, leveraging their advantages of wide-area coverage and freedom from geographic constraints, have become key infrastructure for achieving global seamless connectivity. However, due to the relative motion among satellites in different orbits, inter-satellite links (ISLs) exhibit periodic dynamic on–off characteristics, among which a portion of the interruptions are predictable topological changes. Conventional Open Shortest Path First (OSPF) protocols compute shortest paths solely based on link distance, without considering link effective duration or bandwidth constraints, rendering them inadequate for adapting to the dynamic topological characteristics of satellite networks. Although fast reroute strategies can address sudden link failures, they consume substantial bandwidth resources and cannot provide protection for all nodes across the entire network. Therefore, how to proactively switch service paths before predictable link interruptions occur, so as to minimize service disruption and resource overhead, has become a core issue in ensuring service continuity in LEO satellite networks.

The U.S. National Science Foundation is investing $20 million in a two-year pilot led by UCF’s National Commercialization and Translation Institute to help NSF-funded small businesses overcome the “valley of death” and move late-stage deep technologies toward commercial success. The pilot will also evaluate approaches that could inform a scalable, long-term model.

Achieving high hardness and toughness simultaneously remains a major challenge in advanced structural ceramics. Silicon nitride (Si₃N₄) ceramics provide a promising platform because their α, β, and γ polymorphs exhibit complementary strengthening and toughening characteristics. However, differences in transformation kinetics and rapid volume shrinkage during phase transitions hinder the formation of uniform multiphase microstructures with strong interfacial bonding. Here, a novel phase-transition-regulated precipitation–densification strategy was developed to construct triphase Silicon nitride in-situ composite ceramics with synergistic mechanical properties. This approach provides a new pathway for overcoming the hardness–toughness trade-off and advancing high-performance structural ceramics for demanding engineering applications.

^99mTc-HMPAO leukocyte scintigraphy is an improved, lower-radiation method playing a critical role in early diagnosis and subsequent monitoring of the rare and serious disease of necrotizing external otitis (NEO). Results, though garnered through a small study, show high specificity and sensitivity for diagnosis and later monitoring of disease progression or recurrence.