Abstract In the study of perturbations around black hole configurations, whether an external source can influence the perturbation behavior is an interesting topic to investigate.When the source acts as an initial pulse, it is intuitively acceptable that the existing quasinormal frequencies will remain unchanged.However, the confirmation of such an
Models of mass distribution in the Milky Way are discussed where those yielding the potential analytically are preferred.It is Trivet Foot noted that there are three main contributors to the Milky Way potential: bulge, disc and dark halo.In the case of the disc the Miyamoto-Nagai formula, as simple enough, has shown as a very good solution, but it
The publish/subscribe model has gained prominence in the Internet of things (IoT) network, and both Message Queue Telemetry Transport (MQTT) and Constrained Application Protocol (CoAP) support it.However, existing coverage-based fuzzers may miss some paths when fuzzing such publish/subscribe protocols, because they implicitly assume that there are
This paper presents a control scheme of a wide-area controlled static VAr compensator (WAC-SVC) and its real-time implementation in a hardware-in-the-loop (HIL) simulation scheme with three control objectives: (1) to increase the critical clearing time, (2) to damp the power oscillations, and (3) to minimize the maximum line current.The proposed co