Korean researchers confirmed that underground wireless communication is possible, moving beyond the terrestrial wireless communication they have primarily focused on until now. This opened up a new wireless channel for confirming the survival of buried people in the event of a collapse of an underground facility such as a mine, conducting underground rescue operations, or conducting underground military operations.

Mapping light fields and local density of optical states (LDOS) around nanostructured materials with very high spatial resolution is instrumental for advancing nano-optics, nanomaterial science, and quantum technologies, yet has remained a longstanding challenge. Recently, scientists from Huazhong University of Science and Technology, in China, demonstrated an imaging modality, called scanning-exciton optical nanoscopy (SEON), to simultaneously and robustly map the light fields and LDOS around plasmonic nanostructures and photonic-crystal nanocavities with few-nanometer resolution.

Polyolefin upcycling is advancing through two key hydrogen‑based routes—hydrocracking and hydrogenolysis—which differ fundamentally in mechanism and product profiles. Despite promising lab results, scale‑up faces hurdles including catalyst deactivation, mass-/heat‑transfer limits, and analytical gaps. Researchers outline five priorities to enable real‑world, scalable plastic‑to‑alkane conversion.

Host–guest doping is widely used in organic light-emitting diodes (OLEDs). In principle, non-doped OLEDs that use a single material for charge transport and emission could simplify device fabrication. Here, excited-state energy levels were engineered to strengthen a hot-exciton pathway, enabling rapid utilization of triplet excitons to suppress quenching. With a fast reverse intersystem crossing rate on the order of 10⁸ s⁻¹, the non-doped device achieved a maximum external quantum efficiency of 20.3%. This work offers a new strategy for efficient blue OLEDs.

Recently, the team led by Professor Xin Xu from the School of Atmospheric Sciences, Nanjing University published a short communication in Science Bulletin entitled “Complex Terrain Causes Global Model Prediction Biases of 21.7 Zhengzhou Extreme Precipitation”. The study reveals that the orographic gravity wave drag triggered by complex terrain can cause significant location and intensity biases of the “21.7” Zhengzhou extreme precipitation in global numerical weather prediction (NWP) models.