BackgroundMumps is a viral respiratory disease characterized by facial swelling and transmitted through respiratory secretions.Despite the availability of an effective vaccine, mumps outbreaks have reemerged globally, including in China, where it remains a significant public health issue.In Yunnan province, China, the incidence of mumps has fluctua
At this study an attempt for the theoretical approach of the Re ynolds number effect of air flow to the particle collection efficiency of a fibrous fil ter with cylindrical section will be made.Initially, a report of the air filtration models to fibrous filter media will be presented along with an explanation of both the parameters and the physical
School buildings that projects of a special nature and stages interspersed potential risks and increase the risk of occurrence Crimpers in the implementation phase, including the risk of design, planning and other operational, legal, financial, logistical, physical or human, natural or environmental risks.Despite the similarity of projects, school