Figure 1.

Schematic of cyclical weight transfer with 4 participating institutions ($I_1$, $I_2$, $I_3$, and $I_4$), where $I_1$ is the starting institution. Each arrow represents transfer of updated model weights $W_{t,i}$ at cycle $t$ for $i\in \{\mathrm{1,2},\mathrm{3,4}\}$.