The derailment coefficient, which is calculated based on the wheel-rail contact forces, indicates the running safety of a railway vehicle with respect to flange climb derailment.The value of the derailment coefficient changes constantly due to numerous factors associated with the vehicle and track conditions while the vehicle runs on a service line
This article describes a new concept called the errand economy.It examines the dark side of the platform economy and the gig economy and makes a valuable contribution to the field.The concepts, especially for liberal scholars, hide the negative impact of platform capitalism on production relationships and the working class sd11i by emphasising digi
Since its discovery in Houston, Texas, blues cube in 1987, the Asian "tiger mosquito" Aedes albopictus has spread to 678 counties in 25 states.This species, which readily colonizes container habitats in the peridomestic environment, was probably introduced into the continental United States in shipments of scrap tires from northern Asia.The early p
By aggregating self-reported health statuses across millions of users, we seek to characterize the variety of health information discussed in Twitter.We describe a topic modeling framework for discovering health topics in Twitter, a social media website.This is an exploratory approach with the goal of understanding what health topics are commonly d
The transfer of Pb from the soil to crops is a serious food hygiene security problem in China because of industrial, agricultural, and historical contamination.In this study, the characteristics of exogenous Pb transfer from 17 Chinese soils to a popular wheat variety (Xiaoyan 22) were investigated.In addition, bioaccumulation prediction models of