A steel-polymethyl methacrylate (steel-PMMA) beam was fabricated to investigate the vibration properties of a one-dimensional phononic crystal structure.The experimental system included an excitation system, a signal acquisition system, and a data analysis and processing system.When an excitation signal was exerted on one end of the beam, the signa
Mechanical performance analysis of two-prop shield caving hydraulic support
The bed rock of shallow-buried depth coal seam is relatively thinner and the loose layer is thicker, SOAP 3 IN 1 CITRUS the working face is easy to appear step subsidence and other conditions, and mine rock pressure is severe.The two-prop shield caving hydraulic support used in the working face of shallow buried depth coal seam is prone to insuffic
Antimicrobial Use and Resistance in Surplus Dairy Calf Production Systems
Surplus calves, which consist predominately of male calves born on dairy farms, are an underrecognized source of antimicrobial-resistant (AMR) pathogens.Current production systems for surplus calves have important risk factors for Lacrosse - Protective - Rib the dissemination of pathogens, including the high degree of commingling during auction and
Financial impact of electric scooters: a review of injuries over 27 months at an urban level 1 trauma center (cost of e-scooter injuries at an urban level 1 trauma center)
Background Electric scooters (e-scooters) have become a widespread method of transportation due to convenience and affordability.However, the financial impact of medical care for sustained injuries is currently unknown.The purpose of this study is to characterize total billing charges associated with medical care of e-scooter injuries.Methods A ret