—Radio-Frequency (RF) recharging of sensor nodes is a promising way to minimize maintenance and prolong the operational life of wireless sensor networks. In this paper, we present a simple MAC protocol based on polling that includes provisions for on-demand recharging using the same RF band as normal data communications, and we develop a probabilistic performance model to evaluate the impact o...

Planning a trip with an electric vehicle requires consideration of both battery dynamics and the availability of charging infrastructure. Recharging costs for an electric vehicle, which increase as the battery’s charge level increases, are fundamentally different than refueling costs for conventional vehicles, which do not depend on the amount of fuel already in the tank. Furthermore, the viabi...

The Electric Vehicle Routing Problem with Time Windows (EVRPTW) is an extension to the well-known Vehicle Routing Problem with Time Windows (VRPTW) where the fleet consists of electric vehicles (EVs). Since EVs have limited driving range due to their battery capacities they may need to visit recharging stations while servicing the customers along their route. The recharging may take place at an...

This paper presents dynamic standby control (DSC) with voltage keeper for further standby power reduction. As compared to the reported DSC, the new modified DSC can be kept deeply cut-off with negative overdrive voltage as well. Besides, a bootstrapped voltage keeper directly recharges the boosted node of power gate, which prevents leakage current during the recharging period. However, total st...

Recharging through radio frequency (RF) is a promising approach to enhance battery lifetime of wireless sensor networks (WSNs). In this paper, we design a polling based MAC protocol with round robin scheduling under E-limited service policy. We derive service completion time for E-limited system. In this model, the coordinator sends recharging pulse upon the reception of recharging request(s) f...

Autonomous mobile robots are constrained in their long-term functionality due to a limited on-board power supply. Typically, rechargeable batteries are utilized that may only provide a few hours of peak usage before recharging is necessary. Recharging requires a robot to be taken offline, and attached to a battery charger via human intervention. This is unacceptable in environments where long-t...

One of the crucial issue in the field of autonomous mobile robotics is the vitality of energy efficiency of robots and the entire system they form. By efficiency here we refer to ability of robots (or the system in which they are deployed) to maintain their survival throughout the course of the operation so as to provide themselves with the opportunity of attaining energy once needed. In this p...