A transmission-type terahertz beam reconfigurable metasurface based on a multilayer annular structure.

To achieve flexible control over terahertz beams, vanadium dioxide (VO) with phase transition temperatures of 60 °C and 72 °C is selected. The effects of VO in its two states-insulator (before phase transition) and metallic (after phase transition)-on the amplitude and phase of the unit structure are analyzed. A terahertz beam reconfigurable phase gradient metasurface based on VO with different phase transition temperatures is designed.

The relationship between parent-child relationship and peer victimization: a multiple mediation model through peer relationship and depression.

Introduction: Peer victimization is a highly prevalent worldwide issue with cross-cultural characteristics. Parent-child relationship and peer victimization is known to be interrelated, but how they influence each other remains unclear. This study explored the mechanisms of peer victimization related to parent-child relationship.

Mechanical Behavior of Brick Masonry in an Acidic Atmospheric Environment.

In order to evaluate the deterioration regularity for the mechanical properties of brick masonry due to acid rain corrosion, a series of mechanical property tests for mortars, bricks, shear prisms, and compressive prisms after acid rain corrosion were conducted. The apparent morphology and the compressive strength of the masonry materials (cement mortar, cement-lime mortar, cement-fly ash mortar, and brick), the shear behavior of the masonry, and the compression behavior of the masonry were analyzed. The resistance of acid rain corrosion for the cement-lime mortar prisms was the worst, and the incorporation of fly ash into the cement mortar did not improve the acid rain corrosion resistance.