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This study is supported in part by TUBITAK grant 119C028, and in part by Turkcell Technology within the framework of 5G and Beyond Joint Graduate Support Programme coordinated by Information and Communication Technologies Authority. A communication receiver that wants to pull data from a remote sensor by exploiting wireless energy transfer is considered. The receiver has a long-term average energy budget for this operation, and its goal is to keep the time average of a general age penalty function as small as possible. The channel from the source to the receiver is a two-state (ON/OFF) communication link whose state is IID or Markovian, and known instantaneously by the receiver. Modeling the problem as a constrained Markov decision problem, we obtain a randomized threshold-based decision policy that achieves the minimum possible average age penalty. We determine the optimal time average Age of Information and age violation probabilities by exploiting the optimality of the derived policy. IEEE Control Systems Society Information Theory Society Communication Systems Technical Committee (Performance of Communication Systems Working Group) Publisher's Version WOS:000766966900006

In this paper two new conceptual robotic system designs, called Șaerial-retrievalș and Șaerial-rescueș are presented and demonstrated by simulation results. The Unmanned air vehicles (UAV) used in this design are thrust vector controlled robotic systems. The Șaerial-retrievalș concept aims at entrapping and retrieving a (lost) floating object in the air. The second concept, Șaerial-rescueș aims at rescuing a free falling object (e.g. a person) in the air using a stretched net attached to the UAV's. Position and angular control are applied in both systems.