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In this article, we focus on the PAoI optimization in slotted Aloha networks with FCFS and LCFS service disciplines by optimally tuning the channel access probability and packet arrival rate of each sensor.

Blockchain, as a type of distributed ledger technology, is well-suited for the distribution, sharing, certification, and tracing of …

This paper reported the Oxford SDM prototype circuit system, which is an optical transceiver powered by on-chip solar cells for IoT smart dusts with two-way optical wireless communications.

This paper discussed a logarithmic photodetector with a tunable passband for IoT smart dust applications.

In summary, we have designed and demonstrated a silicon-graphene conductive photodetector with improved responsivity and response speed.

In conclusion, we have achieved the single-, and dual wavelength soliton pulse in an EDFL incorporating a WS2-based fiber taper by properly adjusting the pump strength and polarization state.

In this paper, the design and measurement results of an optically powered, optical receiver areprovided.

This paper introduced an optically powered energy source which can be integrated on the same IC chip as the smart dust circuits.

A fault, especially an incipient fault has to be detected as early as possible to avoid serious damage occurring in the controlled system. A fuzzy relational sliding mode observer (FRSMO) is proposed to estimate the magnitude of slowly evolving faults in information-poor and non-linear systems. To reduce modelling errors, an on-line learning fault identification scheme is used to update the model and identify the fault in a periodical mode. The performance of the proposed methods is evaluated using a cooling-coil subsystem of an air-conditioning plant in a simulated environment. The simulation results of the actuator fault and flow reduction fault estimation confirm the effectiveness of the proposed methods.

In this paper we demonstrate that it is possible to communicate over 10s of metres with systems that can also be powered by the interrogating beam. Low communications energies of 16pJ/bit/mm2 of modulator are achieved, and it should be possible to reduce these further. The total electrical power consumption of the mote is approximately 40nW.