Role-Based Access Control (RBAC) is increasingly used for ensuring security and privacy in complex organizations such as healthcare institutions. In RBAC, access permissions are granted to an individual based on her defined roles. Much work has been done on the specification of RBAC models for enforcing access control; however, in order to arrive at appropriate choices of access control for par...

There has been significant interest in the design of nonreciprocal acoustic devices that allow waves to be perfectly transmitted one direction, whilst propagating opposite direction are blocked or reflected. Previously proposed have broken symmetry transmission by introducing nonlinearities resonant cavities. However, these typically limitations, such as signal distortions and bandwidth over wh...

The ability to control flexural wave propagation is of fundamental interest in many areas of structural engineering and physics. Metamaterials have shown a great potential in subwavelength wave propagation control due to their inherent local resonance mechanism. In this study, we propose a transformation method to derive the material properties of a flexural waveguide and implement the function...

In this study, we address the issue of real-time energy-maximising control for wave energy converters (WECs), by proposing a receding-horizon optimal framework based on concept moment. This approach is achieved extending so-called moment-based framework, recently published in WEC literature, to effectively solve associated problem within finite time-horizon, allowing performance, and straightfo...