Wheels of Change: The Environmental Paradox of Accelerating Vehicle Retirement Program.

Accelerated vehicle retirement is recognized as crucial for managing fleet emissions effectively. However, the emergence of new energy vehicles introduces complexities in assessing their environmental impacts. This study developed a dynamic fleet-based life cycle assessment model to analyze the effects of four distinct scrappage strategies in China from 2021 to 2060.

Tunable bandwidth terahertz perfect absorption device based on vanadium dioxide phase transition control.

Utilizing the phase transition principle of VO, this paper presents a tunable ultra-wideband terahertz perfect absorption device with simple structure and tunability. The proposed broadband terahertz perfect absorption device is a three-layer structure with a metal reflective layer, a silicon dioxide dielectric layer and a VO layer from bottom to top. It was found that the terahertz perfect absorption device's absorption could be dynamically adjusted from 1.