Introdouction: Canal length measurement is essential for proper endodontic treatment. Any error or miscalculation in working length determination, particularly in curved canals, can result in complications during or after root canal therapy. Digital radiography has enabled accurate measurement of curved canal length. In this study, we evaluated the accuracy of calibration of a complementary m...

We describe recent work on the twisted Yangians Y (g,h) which arise as boundary remnants of Yangians Y (g) in 1+1D integrable field theories, bringing out the special role played by the requirement that (g,h) be a symmetric pair.