Cytotoxic T-lymphocyte antigen 4 (CTLA4) is a co-receptor expressed by activated, memory T cells and regulatory T cells 1,2,3,4,5,6. It is a homodimer that can bind to the homodimeric ligands CD80 ...

Investopedia contributors come from a range of backgrounds, and over 25 years there have been thousands of expert writers and editors who have contributed. Gordon Scott has been an active investor and ...

Abstract: The nonstationary spatiotemporal distribution of the ionosphere creates multiple irregular propagation paths between the target and transceivers of the skywave over-the-horizon radar (OTHR).

Abstract: The construction of a digital twin model for the full life cycle of rolling bearings is of great significance for analyzing their degradation performance and health management. However, ...