We analyze the collective dynamics of an ensemble globally coupled, externally forced, identical mechanical oscillators with cubic nonlinearity. Focus is put on solutions where splits into two internally synchronized clusters, as a consequence bistability individual oscillators. The multiplicity these solutions, induced by many possible ways distributing between implies that can exhibit multist...

Duckweeds are the smallest flowering plants on Earth. They grow fast water’s surface and produce large amounts of biomass. Further, duckweeds display high adaptability, species found around globe growing under different environmental conditions. In this work, we report composition 21 ecotypes fourteen belonging to two subfamilies group (Lemnoideae Wolffioideae). It is reported presence starch s...