81 citations · 153 across the 23 of their papers we have counts for
8 papers · 1 filter
Timely Updates in Energy Harvesting Two-hop Networks: Offline and Online Policies
Ahmed Arafa, Sennur Ulukus
A two-hop energy harvesting communication network is considered, in which measurement updates are transmitted by a source to a destination through an intermediate relay. Updates ar…
Online Timely Status Updates with Erasures for Energy Harvesting Sensors
Ahmed Arafa, Jing Yang, Sennur Ulukus +1
An energy harvesting sensor that is sending status updates to a destination through an erasure channel is considered, in which transmissions are prone to being erased with some pro…
Relay-Aided Secure Broadcasting for Visible Light Communications
Ahmed Arafa, Erdal Panayirci, H. Vincent Poor
A visible light communication broadcast channel is considered, in which a transmitter luminaire communicates with two legitimate receivers in the presence of an external eavesdropp…
Anomalous Dome-like Superconductivity in RE2(Cu1-xNix)5As3O2(RE=La, Pr, Nd)
Xu Chen, Jiangang Guo, Chunsheng Gong +8
Significant manifestation of interplay of superconductivity and charge density wave, spin density wave or magnetism is dome-like variation in superconducting critical temperature (…
Age-Minimal Transmission for Energy Harvesting Sensors with Finite Batteries: Online Policies
Ahmed Arafa, Jing Yang, Sennur Ulukus +1
An energy-harvesting sensor node that is sending status updates to a destination is considered. The sensor is equipped with a battery of finite size to save its incoming energy, an…
Securing Downlink Non-Orthogonal Multiple Access Systems by Trusted Relays
Ahmed Arafa, Wonjae Shin, Mojtaba Vaezi +1
A downlink single-input single-output non-orthogonal multiple access system is considered in which a base station (BS) is communicating with two legitimate users in the presence of…