A piezoelectric/magnetostrictive composite vibrating energy generator is introduced, and its output characteristic is analyzed. In order to increase the maximum output power of the vibrating energy harvester, a new up-conversion matching circuit is proposed, which can change the low frequency vibrating signal into a narrow bandwidth signal focused on a higher frequency. The matching circuit wit...

Managing fisheries by delegating authority to an association of users is gaining increased attention as a strategy for implementing rights-based reform. Assigning rights to groups rather than individuals can facilitate coordination and collective action and enable efficiency gains similar to those achieved when a firm organizes its inputs centrally. Evidence from developed country fisheries man...

We analyze coupled flexural vibration of two elastically and electrically connected piezoelectric beams near resonance for converting mechanical vibration energy to electrical energy. Each beam is a so-called piezoelectric bimorph with two layers of piezoelectrics. The 1D equations for bending of piezoelectric beams are used for a theoretical analysis. An exact analytical solution to the beam e...

In this paper, we investigate the usage of a nonlinear energy harvester at full-duplex (FD) relay, which can harvest from radio frequency (RF) signals transmitted source. We mathematically derive exact closed-form expressions outage probability (OP), throughput, and average symbol error rate (ASER) harvester-wireless information power transfer-FD relaying (N-WIPT-FDR) system over Rayleigh fadin...

This paper deals with an electrical modelling and optimization of a thermal energy harvester dedicated to power autonomous systems. Such devices based on bimetal strips and piezoceramics turn thermal gradients into electricity by a two-step conversion mechanism. This work focuses first on a demonstration of a ST-WSN (GreenNet demonstration platform) supplied by the harvester to validate, for th...

Many efficient methods of generating “good” random numbers exist in the literature of mathematics and computer science. One particular method of generating usable randomness is with “extractors”: graphs which will transform “bad” randomness (i.e. a smaller ratio of entropy/data, or randomness distributed poorly) to “good” randomness (of a provable level of security) by an additional input of on...

Automation of agricultural harvesting equipment in the near term appears both economically viable and technically feasible. This paper describes a vision-based algorithm which guides a harvester by tracking the line between cut and uncut crop. Using this algorithm, a harvester has successfully cut roughly one acre of crop to date, at speeds of up to 4.5 miles an hour, in an actual alfalfa field...