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A recent study conducted by the China Automotive Engineering Research Institute Co. Ltd. explores the effectiveness of a combined active and passive safety system in protecting pedestrians from head injuries in vehicle collisions. The study constructs a "vehicle-pedestrian" interaction system and analyzes the impact of the exterior airbag and braking control systems on pedestrian head injury. The results show that the exterior airbag can effectively protect the pedestrian's head and reduce the head injury criterion (HIC). The study proposes a hierarchical design strategy and a rapid prediction method for HIC, providing a theoretical basis for parameter design and selection. [Extracted from the article]

A recent study conducted at the Second Affiliated Hospital of Kunming Medical University in China focused on the role of cytokines in the pathogenesis of bullous pemphigoid (BP), an autoimmune disease. The study found that T helper cells, specifically Th2 and Th17 cells, play a significant role in the pathogenesis of BP. Cytokines such as IL-4, IL-5, IL-13, IL-17, and IL-23 were found to be involved in various aspects of the disease, including eosinophil recruitment, antibody production, pruritus, blister formation, and inflammation. The researchers concluded that a better understanding of these cytokines could lead to potential therapeutic targets for BP. [Extracted from the article]

Researchers at Peking University conducted a study on the effects of ability tracking, a practice of grouping students based on their test scores, on students' academic and non-academic outcomes in rural junior high schools in China. The study found that ability tracking had no statistically significant effect on students' academic or non-academic outcomes overall. However, it did help reduce math anxiety among high-ability students. The study also found that ability tracking was associated with lower math scores for low-ability boarding students compared to non-boarding students in comparison schools. The research was supported by the National Natural Science Foundation of China and has been peer-reviewed. [Extracted from the article]