Early Warning (United States)

Interactions Among Three‐Tier Factors of Community Safety Resilience: A Dual‐Perspective Analysis

ABSTRACT Enhancing community safety resilience (CSR) is critical for sustainable urban development. Disregarding the complex interactions among CSR factors may cause imbalanced resilience building, limiting a community's capacity to respond to uncertain disasters. This study aims...

Spatial decoupling and structural fragility of China's grain system: Long-term evolution and pathways toward resilient reconstruction, 1990-2050

Climate-driven instability and the spatial mismatch between grain production and consumption pose growing threats to national food security. In response to this challenge, we developed a comprehensive evaluation system combining dynamic centroid analysis, optimisation model and e...

Time‐Varying Mosaic Metasurface Architecture Enabling Programmable Multi‐Tone Pseudo‑Doppler Spectral Engineering

ABSTRACT The pseudo‐Doppler effect, an artificial frequency shift produced by time‐varying phase modulation of stationary structures, offers a promising route for electromagnetic (EM) wave manipulation. However, existing time‐modulated metasurfaces are predominantly spatially uni...

Synergistic Mechanisms of Bio-Based Polymers and Silica Nanoparticles in Foam-Based Biomass Dust Suppression: Experiments and MD Simulations

Abstract Dust explosions in biomass processing motivate the development of eco-friendly foam dust suppressants. This work formulates foams comprising zwitterionic surfactants, bio-based polymers (CMC, SA), and SiO2 nanoparticles and correlates macroscopic wetting, drainage, and d...

Non-targeted screening and chemical fingerprint analysis of anthropogenic contaminants in duck Farm Agro-Ecosystems

A non-targeted UHPLC-Q-Orbitrap-HRMS workflow was applied to six matrices from two duck farms in Hunan, China. A total of 3,352 chemical features were obtained, and 209 anthropogenic contaminants were annotated (60 at Schymanski Level 2 and 149 at Level 3). Chemical and industria...

Experimental study on the deflagration and flame‐development characteristics of hydrogen‐blended natural gas flames under various initial conditions

Abstract Hydrogen‐blended natural gas (HBNG) is an effective transitional solution for large‐scale hydrogen energy transportation, whose safety requires quantitative assessment from a practical perspective. This study constructed a 60 L cylindrical deflagration experimental setup...

A Visual Detection and Multi-Zone Personnel Safety Control Method for Firework Manufacturing Workshops

Real-time visual detection is essential for personnel safety control in firework manufacturing workshops, where inadequate personnel-count control can increase safety risks in hazardous production zones. This study proposes a visual detection and multi-zone personnel safety contr...

Modulation of the Relationship Between ENSO and the Intensity of the South China Sea Summer Monsoon by Quasi‐Biennial Oscillation

ABSTRACT This study investigates how boreal winter equatorial stratospheric quasi‐biennial oscillation (QBO), defined by 70‐hPa zonal winds, modulates the El Niño–Southern Oscillation (ENSO)–South China Sea summer monsoon intensity (SCSSMI) relationship during 1952–2020 using the...