  In this paper, we study a model relevant to semantics-aware goal-oriented
communications. More specifically, observations from an external process are
transmitted through status updates to a battery-powered receiver. From these
updates, the receiver is informed about the status of the process and if there
is sufficient energy, uses them to perform an actuation to achieve a goal. We
consider a wireless power transfer model where the destination receives energy
from a dedicated power transmitter and occasionally from the data transmitter.
We provide the analysis for the Age of Information (AoI). Furthermore, we
propose a new metric, namely the \textit{Age of Actuation (AoA) which is
relevant when the receiver utilizes the status updates to perform actions in a
timely manner}. We analytically characterize the AoA and we show that is a more
general metric than AoI. We provide the optimization problems for both metrics,
and we numerically evaluate our analytical results.
