BackgroundAs a crucial component of solar radiation, the association between exposure to ultraviolet (UV) radiation and acne remains unclear.ObjectivesTo investigate the association of previous exposure to ultraviolet radiation at different wavelengths or doses with acne in college...

To accurately predict the gravity separation distribution rate and thus the product yield during the design and management of coal preparation plants, a modified hyperbolic tangent model was proposed to derive direct calculation formulas for heavy-medium and water-medium separation distribution...

Dielectric barrier discharge (DBD) synergistic catalysis technology combines the high reaction activity of a plasma and the high reaction selectivity of a catalyst and has attracted increased attention in recent years. In this work, the conversion of carbonyl sulfide (COS) by DBD combined with a...

A new process of “cold spraying interlayer + roll-bonding” (CSIR)for preparation of metal clad plates was put forward. Firstly, micro-Ni particles were cold sprayed to form an ultra-thin coating between two substrate slabs. Then the elongation and bonding of Mg and Al substrate slabs and...

Constructing acceptor–donor units (D/A) of polymer is an efficient method for promoting carrier separation to optimize photoreactivity. However, the carriers across the D/A interface of micromolecule was relatively hindered by the Coulomb potential. In this work, the polarity-bridged...

Natural disasters may cause extensive damage to local communities. In 2021, the historically low-temperature snowstorm Uri hurt Texas by disrupting business and activities, constraining energy distribution and consumption, and preventing residents from accessing critical resources. To mitigate...

Sulfur hexafluoride (SF6) is commonly used as an insulating medium for high-voltage electrical equipment. However, SF6 is also a greenhouse gas, which escapes into the atmosphere during use, so its emissions represent a serious environmental threat. Therefore, the capture and recovery of SF6 gas...

We estimate the forward-looking long-term equity risk by extrapolating the way it participated in the real economy. We decompose the 1926-2000 historical equity returns into supply factors including inflation, earnings, dividends, price to earnings ratio, dividend payout ratio, book value,...

We use Bayesian dynamic factor models to disentangle the global and idiosyncratic country-specific factors of the stock market prices and other macroeconomic variables from a large group of countries. We find that the global factors account for significant portions of an individual country's...