SONAR (Swiss Sonography Group in Arthritis and Rheuma- tism) is a musculoskeletal ultrasound expert group founded in 2008. The group has developed a semi-quantitative score for Rheumatoid Arthritis using modified OMERACT criteria for synovitis, tenosynovitis and erosions. The score in- cludes B mode and Powerdoppler mode in finger joints, wrists, elbows and knees, an erosion and tenosynovitis score and ad- ditional cartilage measurement in selected joints. 2015 we developed and introduced a semi-quantitative score for hip involvement in Spondyloarthritis and started teaching the score to rheumatologists nationwide (Sonar-Hip or CoxSo- nar Score). Since 2008 we promote musculoskeletal ultrasound (msus) in the management of RA patients to increase the role of msus in RA and to improve patient outcomes. The So- nar-group offers msus courses to improve practical skills. The scientific commitee of the Sonar-group works with and supports the SCQM (www.scqm.ch) In 2018, the SONAR group has decided to focus more on the use of ultrasound in psoriatic arthritis and spondylarthitis. We have started a project concerning the implementation of a newly defined ultrasound enthesitis score in the registry. A preliminary score based on the OMERACT definition of ultra- sound elementary lesions observed in inflammatory enthesitis has been developped. The implementation process into SCQM has been finalyzed in 2019 followed by a validation study and teaching courses.
This book presents a generalization of transforms from the frames co-moving with an accelerated particle for uniform circular or linear motion into an inertial frame of reference. The solutions presented here will be of great interest for real-time applications because earth-bound laboratories are inertial only in approximation. The motivation behind this is that real life applications include accelerating and rotating frames with arbitrary orientations more often than the idealized case of inertial frames. The book is divided into three main sections: the first deals with the theory of dynamics, while the second section deals with the application of theory to the derivation of the relativistic fictitious forces (Coriolis, centrifugal and Euler) occurring in a rotating frame and D’Alembert for a linearly accelerated frame. The third section deals with the Thomas Wigner effect. This is the first book on the subject and it will be of great interest for physics students, physics professors, and engineers.
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