IEEE 802.15.4 LR-WPAN is a specification for low-cost, lowpowered and low data rate transmission. This standard uses CSMA/CA protocol for contention resolution. One of the tasks performed by CSMA/CA algorithm is Clear Channel Assessment (CCA), used to find the status (IDLE or BUSY) of the channel. There are three operating modes to perform CCA. As per the standard CCA mode 2 and 3 are based on ...

Multi-carrier cooperative relay-based wireless communication is of particular interest in future wireless networks. In this paper we present resource allocation algorithm in which sub-carrier pairing is of particular interest along with fairness constraint in multi-user networks. An optimization of sub-carrier pair selection is formulated through capacity maximization problem. Sub-carrier pairi...

Wireless sensor networks have seen thriving development and its increased usage has made it a keen topic for researchers to explore more. Huge investments and research efforts are going on in this field. It has been used for the purpose of sensing and communicating data without any supervision of human being. There are various areas where research activities are going on in Wireless sensor netw...

© 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim 1 wileyonlinelibrary.com orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) of the individual CQDs. This inhomogeneity in electronic energy levels can disrupt the charge hopping transport in CQD fi lms and degrade the transport rate signifi cantly. In addition, a suffi ciently narrow CQD size dispersion is essential to achieve the...

Cooperation in wireless networks has been recently considered as a technique to increase the network throughput. However, for sensor networks with limited available energy, this benefit may come at the expense of a increased energy consumption due to the simultaneous transmission by many nodes. In this paper we consider the bit per Joule achievable rate (AR) as a performance measure of a cooper...

This paper focuses on energetic aspects of the dynamics and control of process networks with high material recycle. Two prototype systems are analyzed, for which the large material recycle acts as an energy carrier, leading to a high energy throughput for the entire network. Using singular perturbation arguments, we show that the variables in the energy balance of these networks evolve in the f...

Wireless body area networks (WBANs) are expected to influence the traditional medical model by assisting caretakers with health telemonitoring. Within WBANs, the transmit power of the nodes should be as small as possible owing to their limited energy capacity but should be sufficiently large to guarantee the quality of the signal at the receiving nodes. When multiple WBANs coexist in a small ar...

The flow of energy from the laser to the lattice during pulsed laser annealing of Si is examined, with particular attention paid to the influence of the dense'plasma of hot, photoexcited carriers on-the manner in which this energy transfer occurs. Consideration of carrier thermalization and recombination at high carrier densities suggests that under certain conditions carrier diffusion may incr...