21 research outputs found
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A short model excitation of an asymmetric force free superconducting transmission line magnet
A short model of asymmetric force free magnet with single beam aperture was tested at Fermilab together with the excitation test of VLHC transmission line magnet. The design concept of asymmetric force free superconducting magnet was verified by the test. The testing reached up to 104 kA current and no indication of force imbalance was observed. Since the model magnet length was only 10cm, A 0.75m model was constructed and tested at KEK with low current to ensure the validity of the design. The cool down and the excitation at KEK were also successful finding very small thermal contraction of the conductor and reasonable field homogeneity
Increasing Incidence of Hand and Distal Upper Extremity Injuries Associated With Electric Scooter Use.
PURPOSE: Electric scooters (e-scooters) have seen an increase in popularity in cities across the United States as a form of recreation and transportation. The advent of ride-sharing applications allows anyone with a smartphone to easily access these devices, without any investment or experience required. In this study, the authors analyze scooter-related injuries of the hand and upper extremity.
METHODS: The National Electronic Injury Surveillance System (NEISS) was queried to look for injuries related to the use of e-scooters between 2010 and 2019. Data collected included demographic information, the location of the injury, the injury diagnosis, and disposition. National estimates (emergency room visits in the United States) were calculated using the weight variable included in the NEISS database. Miscoded reports were excluded. As a corollary, Google Trends data were utilized to establish a correlation between e-scooter-related injuries and the relative number of e-scooter hits on the Google search engine.
RESULTS: From 2010 to 2019, there were 730 e-scooter-related injuries reported to the NEISS database. This corresponds to an estimated 26,412 injuries nationally during this time period. The incidence of scooter-related injuries increased by over 230% (2,130 national injuries in 2010; 7,213 national injuries in 2019; relative difference 5,083). Injuries most commonly occurred in patients aged 10 to 18 years (30.3%). The most frequent site of injury was the wrist (41.9%). The most common injury diagnosis was fracture (55.3%). Additionally, there was a correlation between the number of Google Trends e-scooter hits and the number of injuries during this time period.
CONCLUSIONS: The incidence of e-scooter-related upper extremity injuries increased dramatically in the United States between 2010 and 2019.
CLINICAL RELEVANCE: As novel e-scooter-sharing apps become increasingly popular, it is imperative that users are educated about the risk of injury and that use of proper protective equipment is encouraged