Abstract: Recommender systems are essential in digital services for helping users find relevant items. One of the main challenges faced by these systems is the problem of sparsity, where limited ...

As renewable energy installations multiply, the first generation of solar panels, wind turbine blades, and lithium-ion batteries is reaching the end of its lifespan. Police in Finland arrest 2 members ...

Thomas Midgley Jr. was celebrated as one of the most brilliant inventors of his era. His solutions eliminated engine knocking and made refrigeration safe for homes worldwide. What was not understood ...