A single sewing needle is tiny enough to slip through fabric unnoticed, yet physics suggests that if it somehow struck Earth at light speed, the result would look less like a pinprick and more like a ...

Ultimately, Game of Wool has cast a valuable spotlight on a heritage craft under threat despite its global profile.

Can you chip in? As an independent nonprofit, the Internet Archive is fighting for universal access to quality information. We build and maintain all our own systems, but we don’t charge for access, ...

Abstract: We introduce a new algorithm for 3-D image reconstruction from cone-beam (CB) projections acquired along a partial circular scan. Our algorithm is based on a novel, exact factorization of ...

Abstract: Ultrasound-guided regional anaesthesia is increasingly used, enabling surgery on conscious patients. The precise location of the needle tip is crucial to avoid nerve damage, which is the ...