PENDULUM SEISMOMETERS are among the oldest forms of instruments employed to record earthquake motion upon a stationary plate. In 1841 crude forms of such seismometers were used to record shocks at ...

Abstract: Reduced-order models (ROMs) are popular in online motion planning due to their simplicity. A good ROM for control captures critical task-relevant aspects of the full dynamics while remaining ...

Abstract: In this paper, an adaptive fuzzy control scheme for two inverted pendulums mounted on two carts with unknown control directions is proposed. A kind of Nussbaum-type functions is designed, ...

Clock mystery from 350 years ago is shedding light on human health In 1665, the inventor of the pendulum clock, Christiaan Huygens, noticed that two of his clocks hung on the same wall would ...

Their common name comes from their gourd-like nests that hang like pendulums from trees. Remizids are found in Europe, Asia and Africa, with one species (Verdin, Auriparus flaviceps) in North America.