In this paper, we present a multi-channel carrier sense multiple access with collision avoidance (CSMA/CA) protocol for orthogonal frequency division multiple access (OFDMA) systems. The CSMA/CA ...

We study a distributed coordination function (DCF) aided WLAN system, where the user stations (STAs) are capable of harvesting energy either from the AP's downlink data transmission or from the AP's ...

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A comprehensive comparative analysis of energy efficiency in Wireless Sensor Networks, focusing on IEEE 802.15.4 and LEACH protocols. This project evaluates performance metrics, energy consumption ...

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Background The American Heart Association has advocated for regionalized systems of care for out‐of‐hospital cardiac arrest (OHCA), emphasizing admission to specialized centers with onsite coronary ...

Consider optical transmitters. From the viewpoint of semiconductor laser diodes, the GaAlAs material system can cover the wavelength range from 700 nm to 1 000 nm, while InGaAsP can cover 1 000 nm to ...

We have developed a thiol-modified nanoporous silica material (SH-SAMMS) as an oral therapy for the prevention and treatment of heavy metal poisoning. SH-SAMMS has been reported to be highly efficient ...